352674909 Cementing Squeeze Program Example Pdf

CemCADE* Cementing Program 7" Liner Cementing Program Well: Engkabang West 1 Field: SK-333 Rig: Nabors-503 Prepared by:

Prepared for:

Fesarama Felaza

Alex Dixon

Schlumberger Well Services

JX NOEX

First Floor, Lot 1786, Block 5, Jee Foh Road,

Lot 1168, 3rd floor,

Miri, 98000, Malaysia

Wisma Interhill

Tel: 0123293466

Miri, 98100

Version: V4. Rev. 3 Date: 02-13-2014

Disclaimer Notice:

This information is presented in good faith but the results given are estimates based on various assumptions relating to the well, reservoir, and desired services. All recommendations given are opinions only and rely on facts or information provided by the Operator or others, limitations of computer modeling, estimates as to unknown data, or on inferences, measurements, and assumptions that are not infallible. NO WARRANTY IS GIVEN OR IMPLIED AS TO THE RESULTS PRESENTED, ACCURACY OR COMPLETENESS OF INFORMATION, EFFECTIVENESS OF PRODUCTS, MATERIALS OR SUPPLIES, RECOMMENDATIONS MADE, OR RESULTS OF SERVICES RENDERED.

Miri Cementing Services

Document Control Document Name and Version: Well Engkabang West 1, 7" Liner, Rev Rev. 3 Once approved by Schlumberger and the Operator, any deviation from this program requires documented agreement (SLB QHSE Standard S010 Management of Change and Exemption Standard). Approvals Name

Signature

Date

Author

Fesarama Felaza

Fesarama Felaza

13-Feb-14

Schlumberger Review

Zakhirah Shahrum

Schlumberger Approval

Ouagal Oueddo (FSM)

Customer Approval

Alex Dixon

Distribution List: JX NOEX (Company Man, Drilling Engineer), SLB (FSM, DESC’s, DTE, On site supervisor) Cementing program generated from: CemCADE file: ‘’7in liner (13-feb).cfw”, LoadCase Base case CemCADE version: “Version wcs-cem473_08”

Revision History Date

Version

Description

Author

1-Feb-14

V1

Preliminary CemCADE for drilling engineer

Fesarama Felaza

8-Feb-14

V2

Revision 1

Fesarama Felaza

12-Feb-14

V3

Revision 2

Fesarama Felaza

13-Feb-14

V4

Revision 3

Fesarama Felaza

Page 2 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Table of Contents Document Control ............................................................................................................................................................... 2 Table of Contents ................................................................................................................................................................ 3 References .......................................................................................................................................................................... 4 Design Discussion ............................................................................................................................................................... 5 Well Data Summary ............................................................................................................................................................ 6 Centralization .................................................................................................................................................................... 20 Fluid Sequence ................................................................................................................................................................. 21 Pumping Schedule ............................................................................................................................................................ 22 Job Preparation ................................................................................................................................................................. 23 Job Procedure ................................................................................................................................................................... 27 Contingency Plans ............................................................................................................................................................ 30 Software Simulations......................................................................................................................................................... 30 Laboratory Reports............................................................................................................................................................ 39

Page 3 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

References Well Trajectory Open Hole Size

Formation Data Mud Properties Temperature Data Casing ID Liner hanger Centralizers

Page 4 of 45

Date Received 5-Feb-14 31-Jan-14

Originator

Ref.

James Daniel James Daniel

7-Feb-14

Nguyen Bao Toan

30-Jan-14 12-Feb-14

JX NOEX Thony Maratin Saba

EW-1 ST1 Survey Report_3767m_05Feb2014.xlsx Caliper_2810-3738m.las Nippon_EW-1-FMIcalipers_LAS_3755m_to_2800m_5Feb2014.las Daily drilling report dated 30-Jan-14 229_EW1_DMR_11022014.xlsx

18-Nov-13

Mike Nguyen

Copy of EW-1 Temp Log.xlsx

12-Feb-14 12-Nov-13 12-Feb-14 12-Nov-13 12-Feb-14

Nguyen Bao Toan Nguyen Bao Toan Nguyen Bao Toan Nguyen Bao Toan Nguyen Bao Toan

Email dated 12-Feb-14 Nippon HPHT Well - 7 x 9.875 Rev 01.pdf Engkabang W1 7 in Casing Tally Draft1 09-Feb.-14.xls CW7A 07000812.pdf Email dated 12-Feb-14

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Design Discussion OBJECTIVE  Support the casing/formation from TD (3766.0 m) until expected minimum contaminated cement top at 3300.0 m.  Provide casing support and shoe integrity for drilling ahead. ACCEPTANCE CRITERIA  TOC at minimum desired depth, verified by no losses during the cement job and/or achieve minimum pressure differential at the end of the job as expected. Refer to Pressure simulation chart.  Drill hard cement through shoe track and achieve desired FIT/LOT.  No SQ/HSE incident during pumping operation. CENTRALIZERS  Schlumberger recommends a minimum 75% standoff to a point 500ft above the top of HC (or above the shoe, if no HC zone exists).  As per provided informations, centralizers avaliable for the job are : 1. Slip On Centek Centralizer (8.25” nominal OD) : 146ea available  Efforts were made to optimize and achieve best centralization with the provided resources above.  Centralization program proposed for this string is expected to give a standoff of 24.7% to 78% across the centralized section with the agreed hole size basis (10% excess over caliper data)  A total of 145ea centralizers were utilized on the design  All centralizers were reported to be floating, as the hole are mostly over gauged  Based on the WELLCLEAN* simulation, mud contamination is expected from top of liner to 3250m-MD MUD PROPERTIES and CONDITIONING  WBM mud is used in this section. The density of the mud is expected to be 18.10 lb/gal.  Reported ratio of “Solid:Oil:Water” is 38.7 %:0.0 %:61.3 % with a rheology of PV: 30.552 cP; YP: 25.76 lbf/100ft2.  If the mud density is more than +/-0.2 lb/gal different than simulated value prior to starting the cement job and/or the rheology exceeds by 10% the above range, the onshore cement engineer should be contacted and the simulation rerun.  Prior to cementing, it is recommended to have the mud rheologies down to as low as reasonably possible (Recommended Yp < 10~12 lbf/100ft2).  Once casing is on bottom, prior to cementing, casing should be circulated for the greater of either 1x casing volume, or 1.5x bottoms up, unless lost circulation issues prevent this. Circulation should continue until mud is fully conditioned and acceptable gas levels are measured that are similar to background gas after circulating bottoms up after tripping during drilling  While circulating, slowly stage pumps up to the maximum treatment rate. During this circulation, the pressures at different pumping rates should be recorded (this will help to calculate the top of cement based on final differential pressure at the end of the job).  It is recommended to rotate the casing during mud conditioning as it can help to improve mud removal

Page 5 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services 

Simulated velocity profile with 6bpm circulation rate at 2866m-MD (worst stand off point) can be seen below. Simulation was done with and without 20rpm rotation, as can be seen without casing rotation it was simulated that the mud left at narrow side will be static and may increase contamination risk.

20 rpm rotation

no casing rotation

TEMPERATURE SIMULATION  For BHST source, refer to the “reference” section.  BHCT of 260degF is derived with CemCADE temperature simulation by using fluid placement sequence.  Mud circulation @ 6.0 bbl/min for 180.0 min is considered to derive BHCT. WIPER PLUG PLACEMENT  Wiper plug sequence: MUDPUSH II – Cement – Top Plug – MUDPUSH II – MUD – MUDPUSH II – MUD SPACER  MUDPUSH II spacer is used to improve mud removal efficiency and to minimize the contamination between mud and cement slurry. It will also maintain the hydrostatic balance against the formation fluids.  Schlumberger recommends pumping a spacer volume to cover minimum 150 meters length in the annulus or 60 bbls volume, whichever is larger.  It is recommended to pump spacer behind as per job schedule, to minimize a chance of any direct contact between cement-WBM while pulling out with setting tool. CEMENT SLURRY SYSTEM AND VOLUME  18.80 lb/gal DensCRETE* cement slurry for zonal isolation and high compressive strength will be used for this job.  Slurry volume is based on: o 2818 to 2885m-MD : 10% annular excess over MWD calipered hole size o 2885 to 3750m-MD : 10% annular excess over FMI log caliper hole size o 3750 to 3767m-MD : 10% annular excess over MWD calipered hole size  175bbls of DensCRETE* cement slurry will be pumped  PlugAdvisor* simulation program was run to asses contamination risk across cemented section.  1120m-MD of “minimum contaminated” cement slurry have been achieved with 185bbls slurry volume based on PlugAdvisor* simulation. Page 6 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services DISPLACEMENT  Displacement will be done with 18.10 lb/gal WBM .  Displacement rate is designed as per the pumping schedule.  Calibrate the cement unit displacement tank and computer by pumping 10 bbls of water from one tank to the other and verifying accuracy against the electronic counter.  Displacement will be done by SLB pump.

Page 7 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Well Data Summary The cementing program incorporates the following data: Configuration

Liner ; Single stage

MSL / Water Depth / Return

(m)MD ; (m)MD ; 0.0 mMD

Rig Type

Land

Section MD / TVD

3767.0 m ; 3564.2 m

Fluids Return to

RIG_FLOOR

All depths take the rig floor as reference.

MD

OD

Joint

Weight

ID

(m)

(in)

(m)

(lb/ft)

(in)

1074.5

9 7/8

12.2

62.8

8.720

2818.0

9 7/8

12.2

62.8

8.698

Drill pipe

2696.0

5 1/2

12.2

24.7

Casing/Liner

2822.5

7

12.7

3766.0

7

11.1

Prev. Casing

Landing Collar

3730.0 m

Collapse

Burst

(psi)

(psi)

-

-

-

-

4.778

S135

11177

16298

HT55

29.0

6.241

P-110

8530

11220

VamTop HT

32.0

6.175

Q125

11710

14160

VamTop HT

Type

Grade

Thread

Serial Number

Float Shoe 3766.0 m Type Serial Number *) Casing and drillpipe ID was provided by JX NOEX and based on caliper data, all volumetric calculations were based on these values.

Page 8 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Open Hole and Formation Data Mean OH Diameter Mean Annular Excess

MD (m)

2818.0 2821.4 2822.4 2823.1 2824.3 2824.7 2854.6 2854.8 2855.2 2855.8 2856.6 2856.7 2859.9 2860.1 2860.2 2860.7 2860.9 2861.0 2861.2 2861.5 2861.8 2862.7 2864.1 2864.4 2864.7 2864.8 2865.4 2865.6 2865.7 2884.9 2885.3 2885.4 2885.5 2885.6 2885.7 2886.3 2886.4 2887.6 2887.7 2889.1 2889.2 2889.4 Page 9 of 45

: 8.873 in : 10.0 % Caliper and Hole Size Data Caliper Excess (in)

(%)

8.878 8.891 8.549 8.986 9.555 9.164 8.811 9.166 17.601 16.326 17.606 11.625 8.587 9.161 9.748 10.361 9.520 9.009 9.621 10.217 9.689 9.304 16.049 15.476 16.053 10.613 11.058 10.340 9.251 8.919 8.373 9.100 9.499 9.864 10.319 9.418 10.763 9.490 10.174 9.163 9.753 9.236

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

9.045 9.058 8.688 9.161 9.774 9.353 8.972 9.356 18.327 16.979 18.333 11.989 8.730 9.349 9.981 10.639 9.736 9.186 9.845 10.484 9.918 9.504 16.686 16.080 16.690 10.909 11.384 10.617 9.447 9.089 8.498 9.284 9.713 10.106 10.595 9.627 11.069 9.704 10.438 9.352 9.987 9.431

Miri Cementing Services

MD (m)

2889.5 2889.9 2890.0 2890.4 2890.5 2891.9 2892.0 2892.6 2892.7 2893.7 2893.8 2894.2 2894.3 2898.7 2898.8 2900.2 2900.3 2906.7 2906.8 2907.6 2907.7 2907.9 2908.0 2908.2 2908.3 2909.1 2909.2 2909.4 2909.5 2910.3 2910.4 2911.6 2911.7 2911.9 2912.0 2912.2 2912.3 2912.5 2912.6 2913.6 2913.7 2914.7 2914.8 2915.4 2915.5 2915.7 2915.8 2916.0 Page 10 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

9.942 9.160 9.824 9.290 9.961 9.347 10.083 9.384 10.178 9.375 10.319 9.402 9.982 9.148 9.434 9.230 9.702 9.188 9.863 9.325 10.300 9.934 10.849 9.907 10.854 9.512 10.110 9.108 10.042 9.448 10.341 9.379 10.409 9.592 10.399 9.501 10.446 9.249 10.411 9.463 10.075 9.543 10.079 9.422 10.017 9.268 9.936 9.392

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

10.190 9.349 10.063 9.489 10.210 9.550 10.341 9.590 10.443 9.580 10.594 9.609 10.232 9.335 9.644 9.424 9.932 9.378 10.105 9.526 10.574 10.181 11.161 10.152 11.166 9.728 10.370 9.293 10.297 9.659 10.618 9.584 10.691 9.814 10.680 9.716 10.730 9.444 10.693 9.675 10.332 9.761 10.337 9.631 10.270 9.465 10.183 9.598

Miri Cementing Services

MD (m)

2916.1 2918.5 2918.6 2918.7 2918.9 2919.0 2919.6 2919.7 2919.8 2919.9 2922.3 2922.4 2923.2 2923.3 2927.1 2927.2 2927.3 2929.7 2929.8 2930.2 2930.3 2930.4 2930.5 2930.6 2930.7 2931.3 2931.4 2931.8 2931.9 2932.0 2935.2 2935.3 2936.7 2936.8 2937.0 2937.1 2938.9 2939.0 2939.4 2939.5 2944.9 2945.0 2946.0 2946.1 2947.5 2947.6 2948.6 2948.7 Page 11 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

10.393 9.388 10.082 9.668 9.337 10.206 9.526 10.290 9.827 10.197 9.600 10.018 9.440 10.080 9.470 9.580 10.293 9.669 10.845 9.816 11.310 10.906 10.571 11.444 10.292 9.778 10.794 9.682 10.627 10.537 9.535 10.464 9.695 10.649 9.668 10.754 9.756 10.639 9.709 10.614 9.495 10.403 9.684 10.630 9.734 10.655 9.538 10.469

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

10.674 9.594 10.340 9.896 9.540 10.472 9.742 10.562 10.066 10.462 9.822 10.271 9.651 10.338 9.682 9.801 10.566 9.897 11.157 10.054 11.654 11.223 10.863 11.797 10.566 10.014 11.102 9.911 10.923 10.827 9.753 10.749 9.924 10.947 9.896 11.059 9.990 10.936 9.939 10.909 9.709 10.683 9.913 10.926 9.966 10.954 9.755 10.754

Miri Cementing Services

MD (m)

2952.3 2952.4 2952.6 2952.7 2957.7 2957.8 2958.0 2958.1 2962.9 2963.0 2964.0 2964.1 2964.3 2964.4 2976.4 2976.5 2980.1 2980.2 2982.6 2982.7 2983.1 2983.2 2987.8 2987.9 2988.1 2988.2 2994.0 2994.1 2994.3 2994.4 2996.4 2996.5 2996.9 2997.0 3001.0 3001.1 3002.9 3003.0 3009.2 3009.3 3010.1 3010.2 3012.4 3012.5 3012.9 3013.0 3013.2 3013.3 Page 12 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

9.364 9.876 9.120 9.824 9.405 9.885 9.085 9.588 9.270 9.661 9.113 9.891 9.269 9.899 9.169 9.589 9.153 9.477 9.198 10.143 9.307 9.913 9.028 9.223 8.839 9.217 8.884 9.447 9.013 9.548 8.961 9.160 9.077 8.928 9.037 9.538 9.123 9.655 9.103 9.483 9.136 9.530 9.088 9.559 9.197 9.747 9.252 9.933

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

9.569 10.119 9.305 10.063 9.613 10.128 9.268 9.810 9.467 9.888 9.298 10.135 9.466 10.143 9.358 9.810 9.341 9.690 9.390 10.405 9.507 10.158 9.207 9.417 9.002 9.410 9.050 9.658 9.190 9.766 9.134 9.349 9.259 9.099 9.216 9.756 9.308 9.881 9.287 9.696 9.323 9.747 9.272 9.778 9.389 9.980 9.448 10.180

Miri Cementing Services

MD (m)

3013.9 3014.0 3014.8 3014.9 3015.1 3015.2 3020.4 3020.5 3020.7 3020.8 3021.6 3021.7 3022.1 3022.2 3022.4 3022.5 3023.7 3023.8 3024.4 3024.5 3028.5 3028.6 3035.6 3035.7 3036.5 3036.6 3037.4 3037.5 3038.3 3038.4 3040.4 3040.5 3053.7 3053.8 3062.8 3062.9 3063.1 3063.2 3066.5 3066.6 3075.5 3075.6 3078.0 3078.1 3079.3 3079.4 3080.4 3080.5 Page 13 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

9.424 9.935 9.085 9.518 9.160 9.873 9.134 9.777 9.132 9.570 9.304 9.720 9.189 9.728 9.243 10.089 9.368 10.121 9.271 10.080 9.261 9.543 9.079 9.350 8.953 9.339 8.967 9.319 8.897 9.204 9.007 9.308 8.913 9.054 8.935 9.573 9.267 9.676 8.953 9.419 9.039 9.685 9.134 9.709 9.272 9.765 9.156 9.445

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

9.633 10.182 9.267 9.734 9.348 10.116 9.320 10.012 9.318 9.791 9.504 9.951 9.380 9.960 9.438 10.347 9.572 10.382 9.468 10.338 9.457 9.761 9.261 9.553 9.126 9.541 9.141 9.520 9.065 9.396 9.183 9.508 9.082 9.234 9.106 9.794 9.464 9.904 9.125 9.628 9.218 9.914 9.320 9.939 9.470 10.000 9.344 9.655

Miri Cementing Services

MD (m)

3083.8 3083.9 3095.3 3095.4 3095.5 3095.9 3096.0 3096.1 3096.5 3096.6 3096.8 3097.0 3097.1 3097.5 3097.6 3101.2 3101.3 3107.9 3108.0 3112.0 3112.1 3147.9 3148.0 3168.0 3168.1 3169.5 3169.6 3171.2 3171.3 3174.6 3174.8 3174.9 3175.1 3175.2 3177.7 3177.8 3178.8 3178.9 3179.5 3179.6 3180.6 3180.7 3181.3 3181.4 3184.6 3184.7 3186.1 3186.2 Page 14 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

9.045 9.407 8.789 9.201 10.026 9.418 10.212 10.727 9.713 10.111 9.177 9.669 10.579 9.462 9.243 8.893 9.356 8.890 9.295 8.883 8.528 8.803 9.151 8.827 9.087 8.810 9.205 8.844 9.209 8.702 9.209 9.642 8.916 9.230 8.859 9.223 9.031 9.505 9.049 9.449 9.020 9.326 8.940 9.436 8.939 9.270 9.000 9.326

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

9.224 9.614 8.948 9.393 10.280 9.626 10.479 11.030 9.943 10.371 9.367 9.896 10.872 9.674 9.439 9.061 9.560 9.058 9.494 9.050 8.666 8.963 9.339 8.989 9.270 8.971 9.398 9.008 9.402 8.854 9.402 9.868 9.085 9.424 9.024 9.417 9.209 9.720 9.229 9.659 9.197 9.528 9.111 9.646 9.111 9.468 9.176 9.528

Miri Cementing Services

MD (m)

3187.0 3187.1 3188.5 3188.6 3188.8 3188.9 3200.9 3201.0 3201.2 3201.3 3201.7 3201.8 3204.1 3204.2 3205.1 3205.2 3205.6 3205.7 3206.3 3206.4 3206.8 3206.9 3207.6 3207.7 3207.9 3208.0 3209.2 3209.3 3209.5 3209.6 3210.8 3210.9 3211.5 3211.6 3211.7 3212.4 3212.5 3213.7 3213.9 3214.2 3214.3 3214.5 3214.6 3215.0 3215.1 3216.9 3217.0 3217.8 Page 15 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

8.936 9.314 8.968 9.432 8.949 9.368 8.872 9.330 8.936 9.290 8.917 9.294 8.891 9.346 8.955 9.319 8.869 9.701 8.797 9.160 8.786 9.158 8.985 9.479 8.999 9.550 8.925 9.561 8.833 9.281 9.099 9.928 9.045 9.677 9.289 8.760 9.505 9.071 8.533 9.511 9.896 9.508 10.109 8.995 9.557 8.867 9.145 8.941

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

9.107 9.514 9.141 9.642 9.121 9.573 9.038 9.532 9.107 9.488 9.086 9.492 9.058 9.549 9.128 9.520 9.035 9.931 8.956 9.348 8.945 9.348 9.159 9.692 9.175 9.768 9.095 9.781 8.995 9.480 9.283 10.174 9.225 9.905 9.488 8.917 9.719 9.252 8.671 9.726 10.142 9.723 10.369 9.171 9.775 9.032 9.332 9.113

Miri Cementing Services

MD (m)

3217.9 3218.7 3218.8 3219.2 3219.3 3220.1 3220.2 3220.4 3220.5 3237.7 3237.8 3238.2 3238.3 3238.9 3239.0 3240.1 3240.2 3241.4 3241.5 3241.6 3241.8 3241.9 3242.1 3242.2 3242.6 3242.7 3243.1 3243.2 3243.3 3243.4 3243.8 3243.9 3245.1 3245.2 3245.4 3245.5 3247.1 3247.2 3249.0 3249.1 3249.7 3249.8 3253.6 3253.7 3253.9 3254.0 3254.1 3256.5 Page 16 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

9.211 8.967 9.559 9.101 9.736 9.245 10.057 9.111 9.481 8.906 9.139 8.987 9.360 8.966 9.524 8.919 9.653 8.991 9.331 9.732 9.048 9.444 9.134 9.636 8.964 9.297 8.992 9.512 9.112 9.446 8.936 9.208 9.024 9.251 9.027 9.366 8.946 9.440 8.937 9.403 9.076 9.497 8.929 9.277 9.046 9.366 9.006 9.092

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

9.402 9.141 9.779 9.285 9.969 9.440 10.312 9.296 9.694 9.074 9.326 9.162 9.563 9.139 9.741 9.088 9.879 9.166 9.534 9.964 9.228 9.653 9.320 9.860 9.137 9.496 9.168 9.727 9.296 9.655 9.107 9.400 9.202 9.446 9.205 9.571 9.118 9.649 9.108 9.610 9.258 9.712 9.099 9.476 9.226 9.571 9.182 9.276

Miri Cementing Services

MD (m)

3256.6 3257.8 3257.9 3258.3 3258.4 3261.2 3261.3 3261.5 3261.6 3261.8 3261.9 3262.0 3263.0 3263.1 3263.9 3264.0 3266.0 3266.1 3266.2 3266.4 3266.5 3266.7 3266.8 3267.0 3267.1 3269.3 3269.4 3271.4 3271.5 3272.1 3272.2 3272.4 3272.5 3273.5 3273.6 3274.2 3274.3 3274.5 3274.6 3274.8 3274.9 3275.1 3275.2 3275.4 3275.5 3276.1 3285.2 3285.3 Page 17 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

9.693 9.052 9.587 9.156 9.918 9.139 9.642 9.072 9.802 9.394 10.072 9.580 8.954 9.847 8.935 9.743 9.009 9.432 9.981 9.146 9.788 9.167 9.646 9.088 9.406 8.874 9.453 9.089 10.081 9.362 9.419 8.807 9.444 9.090 9.569 9.149 9.697 9.075 9.552 9.152 9.589 8.855 9.530 8.945 8.947 9.214 8.770 9.247

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

9.922 9.232 9.808 9.344 10.163 9.326 9.867 9.254 10.039 9.601 10.329 9.800 9.127 10.088 9.106 9.977 9.186 9.642 10.232 9.333 10.024 9.356 9.871 9.271 9.612 9.040 9.665 9.272 10.340 9.566 9.628 8.968 9.655 9.274 9.789 9.337 9.926 9.257 9.769 9.340 9.810 9.020 9.747 9.117 9.118 9.407 8.927 9.443

Miri Cementing Services

MD (m)

3335.6 3335.7 3336.1 3336.2 3337.6 3337.7 3375.7 3375.8 3377.1 3377.2 3388.3 3388.4 3410.5 3410.6 3415.0 3415.2 3417.3 3417.4 3420.0 3420.1 3469.2 3469.3 3469.5 3469.6 3470.0 3470.1 3470.7 3470.8 3488.2 3488.3 3488.9 3489.0 3491.1 3491.2 3499.8 3499.9 3500.3 3500.4 3503.8 3503.9 3513.2 3513.3 3532.2 3532.3 3553.7 3553.8 3571.1 3571.2 Page 18 of 45

Caliper and Hole Size Data Caliper Excess (in)

(%)

8.732 9.575 8.989 9.453 8.878 9.231 8.689 8.611 8.684 8.873 8.748 9.160 8.709 8.597 8.567 8.933 8.594 8.992 8.688 9.247 8.611 8.790 8.608 8.939 8.559 9.060 8.772 9.140 8.682 9.002 8.690 9.033 8.709 8.932 8.707 8.905 8.752 8.991 8.718 8.624 8.636 8.770 8.575 8.807 8.591 8.790 8.565 8.708

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Equiv. Diam. (in)

8.886 9.795 9.164 9.663 9.045 9.426 8.840 8.754 8.835 9.040 8.904 9.348 8.862 8.742 8.709 9.103 8.738 9.169 8.839 9.443 8.756 8.950 8.753 9.110 8.699 9.241 8.930 9.326 8.833 9.178 8.842 9.213 8.861 9.103 8.860 9.074 8.908 9.167 8.871 8.769 8.783 8.929 8.716 8.969 8.734 8.950 8.706 8.861

Miri Cementing Services Caliper and Hole Size Data Caliper Excess

MD (m)

3574.2 3574.3 3612.4 3612.5 3746.0 3766.0 3767.0 MD (m)

TVD (m)

(in)

(%)

8.489 8.589 8.529 8.544 8.476 8.580 8.580

10.0 10.0 10.0 10.0 10.0 10.0 0.0 Formation Data Pore

Frac.

(lb/gal)

(lb/gal)

Equiv. Diam. (in)

8.623 8.733 8.667 8.681 8.610 8.722 8.580 Name

Res. Fluid

2100.0 1993.2 17.70 14.70 2220.0 2096.4 19.90 16.30 2280.0 2148.7 19.90 16.40 Gas 2300.0 2166.4 19.90 16.40 Gas 2400.0 2256.5 19.90 16.40 Gas 2430.0 2284.3 19.90 16.70 Gas 2597.0 2442.5 19.90 17.00 Gas 2822.0 2658.6 20.10 17.40 Gas 2923.0 2755.3 20.10 17.50 Gas 3370.0 3182.5 20.10 17.60 Gas 4230.0 4012.5 20.10 17.60 Gas Reference depth for pressure conversion to equivalent density or pressure gradient is RIG_FLOOR

Temperature Data MD (m)

0.0 2624.0 4230.0

Page 19 of 45

Geothermal Temperature Profile TVD Temperature Rel. Gradient (m)

(degC)

(degF/100ft)

0.0 2468.5 4012.5

32 119 176

0.0 1.9 2.0

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Centralization Assumptions Casing Top at 2696.0 m 7 in casing to 2822.5 m Casing Shoe at 3766.0 m 10% annular excess over caliper hole size data or 9.039 in equivalent hole

Travelling Block Weight Friction Factor Total Drag Force

57.0 ton 0.25 5.5 ton

Hook load (Down/Up)

167.9 ton / 179.0 ton

Placement Details Depth

2707.9 m-2822.5 m 2822.5 m-3433.0 m 3433.0 m-3732.7 m 3732.7 m-3766.0 m

Joint

9 55 27 3

Centralizer Details

Centralizers per joint

Type

Max OD

Min OD

Nos.

3 every 1 joints

CW-7 CW-7 CW-7 CW-7

8.250 8.250 8.250 8.250

8.250 8.250 8.250 8.250

27 55 54 9 145

1 every 1 joints 2 every 1 joints 3 every 1 joints

Total centralizers

Standoff Results:

Page 20 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Fluid Sequence Original fluid Type

Density

Rheology

WBM

18.10 lb/gal

PV: 30.552 cP; YP: 25.76 lbf/100ft2

Fluid Name MUDPUSH II DensCRETE* MUDPUSH II WBM MUDPUSH II WBM

Volume

Ann Length

Top

Density

(bbl)

(m)

(m)

(lb/gal)

80.0 175.0 10.0 100.0 50.0 162.1

552.8 1500.0

1713.2 2266.0 3647.7 2824.8 2228.5 0.0

18.50 18.80 18.50 18.10 18.50 18.10

Rheology PV: 44.689 cP; YP: 18.14 lbf/100ft2 PV: 134.322 cP; YP: 17.49 lbf/100ft2 PV: 44.689 cP; YP: 18.14 lbf/100ft2 PV: 30.552 cP; YP: 25.76 lbf/100ft2 PV: 44.689 cP; YP: 18.14 lbf/100ft2 PV: 30.552 cP; YP: 25.76 lbf/100ft2

Note: for clarity purpose, fluid rheology is given using the Bingham model. However all simulations are run with the Herschel-Bulkley model.

Page 21 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Pumping Schedule Fluid Name

Volume (bbl)

(bbl/min)

Time (min)

Cum Vol (bbl)

MUDPUSH II

80.0

6.0

13.3

80.0

DensCRETE*

175.0

6.0

29.2

175.0

Pause

0.0

0.0

10.0

0.0

MUDPUSH II

10.0

6.0

1.7

10.0

WBM

100.0

6.0

16.7

100.0

MUDPUSH II

50.0

5.0

10.0

50.0

WBM

90.0

3.0

30.0

90.0

WBM

72.1

2.0

36.1

162.1

Shut-In

0.0

0.0

1440.0

0.0

Rate

Comments

Static period after Placement

Total Pumping Time = 02:26 hr:mn Total Displacement Volume = 322.1 bbl Half shoe track vol = 2.18 bbl Other factors that can affect the displacement volume:  Air/gas trapped in the mud.  Variance in casing ID. Pauses for dropping the plugs are estimates only and every effort should be made to minimize the pause time.

Dynamic Security Checks : Frac Absolute Relative Pore Absolute Relative

Page 22 of 45

89 psi 0.7 %

at 3767.0 m at 3767.0 m

275 psi 2.8 %

at 3370.0 m at 3767.0 m

Collapse Casing Drill Pipe Burst Casing Drill Pipe

Engkabang West 1, 7" Liner, Rev Rev. 3

7571 psi 10073 psi

at 2826.6 m at 2696.0 m

10459 psi 15973 psi

at 2696.0 m at 0.0 m

Miri Cementing Services

Job Preparation Total Material Requirements (175bbls slurry) Additives D206 D182 D031 D700 D080A D150 D153 D157 D701

Total Quantity 61.7 gal 334 lb 77656 lb 1241.4 gal 9.5 gal 128.9 gal 286 lb 14323 lb 57.3 gal

Mix Water Requirements Fresh water

Page 23 of 45

5528 gal

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Batch Mixing      



Ensure that the mixer and hoses are cleaned prior to the cement job. No signs of any mud, or hydrocarbon fluids that may contaminate 2 units of batch mixers with 4 compartments will be utilized : o BS956 : Twin 2X80bbls BMX o BS955 : Twin 2X50bbls BMX Considering dead volume and line loss of 5bbls/compartment, 195bbls slurry will be batch mixed. Ensure that the total slurry volume is split evenly into the compartments of the batch mixer during mixing. This is improtant to ensure that all slurry prepared share the same mixing energy. Mixing will be done in 4 separate compartments. Mix fluid will be prepared in BS956. After homogeneous mixtures have been reached and properties checked, fluids will be distributed to both BS956 and BS955 for blend product addition. Fresh water preparation o Total fresh water requirement for 195bbls 18.80ppgDensCRETE* = 48.8bbls o Fill up the compartments with water till desired amounts  BS956  1st compartment : 24.4 bbls of fresh water  2nd compartment : 24.4 bbls of fresh water Chemicals addition and slurry mix o Add the chemicals one by one as per the mixing order in the lab report. Amount for one compartment of BS956 ( to make a total of 49bbls mix fluid)  D206 : 27 gals  D700 : 691 gals  D153 : 159 lbs  Circulate at high rate for 30mins to properly prehydrate  D701 : 32 gals  D080A : 5.3 gals  D150 : 71.7 gals  D157 : 7972 lbs o Mix thoroughly with agitator and circulating pumps. o Take mix fluid sample, label and store properly.  Mix fluid volume should be 49bbls/compartment.  Total mix fluid volume should be 98 bbls o Transfer the mix fluid as follows:  BS956  1st compartment : 30 bbls of mix fluid nd  2 compartment : 30 bbls of mix fluid  BS955  1st compartment : 19 bbls of mix fluid  2nd compartment : 19 bbls of mix fluid o Start adding blend in slowly and build density gradually. Check density of the slurry intermittently using a Presurrized Mud Balance and slowly build up to desired density. o As the density gets 0.4ppg closer to the final density (18.80ppg), add the blend slowly. Remember NOT to over add DensCRETE* blend. o Mix well to homogenize the slurry properly and reduce the viscosity. o Maximum operational batch mix time is 3:00hrs as simulated on the lab.

Page 24 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services o

Final slurry volume should be  BS956  60 bbls of slurry/compartment  BS955  37.5 bbls of slurry/compartment

Page 25 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

HSE & QA/QC Considerations 1) PPE: All requirements for Personal Protective Equipment (PPE) are listed on the Material Data Sheets (MSDS) and must be adhered to at all times. 2) Cleanliness: Check for cleanliness of tanks, Pits, batch mixer and mixing equipment – to be verified by client rep. If any doubts clean again. 3) Mud pits and other rig tanks: When using rig tanks to prepare spacer and mix water for the cement job, ensure that there is no communication or leak path between the tanks; that is a common cause of contamination of spacer and mix water fluids. 4) Equipments: Make sure equipment is working properly; a. Check the NRD (densitometer) for proper reading. Check calibration with water. a. Check the Pressurized Mud Balance is clean, in working condition and properly calibrated (check with water and a high density fluid of known density). b. Displacement tanks have been flushed with drill water; clean and empty to accommodate mix fluid; c. The cement unit has been checked and function tested; d. Barrel Counter of the cement unit is working and is calibrated; e. The Data Acquisition System is tested and working properly; 5) Fluid Compressibility: Check the mud compressibility; get help from mud engineer. 6) Chloride Content: Check for Fresh Water Chloride content should be below 1000ppm; test to be performed from the pit/tank used for preparation of MUDPUSH II* and mix fluid. 7) LOT Numbers: Identify LOT Numbers of Additives to be used; they must be in agreement with the Lab Report. 8) Additive Quantities: Isolate the proper amount of Additives to be used on the job to avoid job delay. 9) Bulk Materials: Make sure to clearly mark the silos that are going to be used. Establish clear communication with the barge captain for bulk delivery. Purge the bulk line before the job to check any possible blockage in the line. 10) Mixing Order: Additives must be mixed as per the Lab Test Report 11) Sampling: Minimum Sample Requirements: a. 11 kg (25 lb) per blend with a minimum of 5 lb (2.3 kg) from each silo/transport silo b. 4-L of Field Water c. 4-L of Mix Fluid d. Appropriate additives QTY to perform lab testing on total cement/blend sample 12) Slurry Samples: Slurry sample should be taken regularly through the job to check for density and should be independently checked with a properly calibrated pressurized mud balance. Review calculations, JRI (Job Risk Index), HARC, Job procedure, equipments and additives status with the Engineer-in-Charge prior to the job.

Page 26 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

MUDPUSH II Spacer Before MUDPUSH II spacer preparation (ideally, 1 day before) check that the tank is empty, clean and has been circulated with fresh water. If any doubt, liaise with Co-Man and Mud Engineer to get it properly cleaned. Review calculations to determine the amount of additives required for the spacer preparation (MUST INCLUDE THE DEAD VOLUME OF THE PIT; REPORT THE TOTAL MIXED QUANTITY IN THE JOB REPORT). Isolate the additives so they are ready to be used. 1) On the tank, check the lines with the Mud Engineer, check the manifold and the valves setup to familiarize with the system. Make sure the tank is properly isolated to avoid contamination. 2) Fill up enough Water to be able to run C-Pump on the tank. Check for clean uncontaminated return. If doubtful, dump, flush and repeat this step. 3) Dump the water, and close all valves. Mixing Tank is ready (witnessed by Co-Man). 4) The Mixing Tank should be empty, if not check all lines and valves to determine where the leak is from (potential contamination). Then flush again lines and Tank with water. 5) With the correct level of Water in the Tank and the circulation ON, take a sample (5 Liters). This should be done from an area that is vigorously agitated in the Tank or from the sampling valve. If several compartments are to be use then sample each of them separately. Properly identify samples through accurate labeling. 6) With circulation ON and paddle ON a. Add the required amount of Antifoam through the mixing hopper to properly disperse it and circulate for 15 to 20 min; b. Add the required amount of D182 through the mixing hopper; 7) Keep circulation ON and paddle ON for 1 hour to properly hydrate D182. 8) Take a sample and ask Mud Engineer to perform Fann Readings at surface condition (R1B1). Compare with Lab Test values for the base spacer. If reading within +/- 10% proceed to next step, if above or below call town for advice. 9) Add the required amount of Barite (D031) through the mixing hopper and circulate for 15 min. Check density using a clean and calibrated pressurized mud balance and adjust as required. 10) When the density is at the correct value, check the Rheology as per step #10. Keep Circulation OFF and Paddle ON. 11) Before pumping check density (should be within +/-0.2 lb/gal from previous reading) and take a sample.

Page 27 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Job Procedure Hold safety meeting with Company Man & Rig personnel at wellsite. (Displacement volume should be double-checked at rig site according to casing tally) Run Liner to TD using centralizers as per centralizer placement schedule in CemCADE. Rig up cementing lines as per WS Safety Standard 5. Rig up liner cement head and load drill pipe wiper dart. Count the turns of pin. . Ensure that safety slings are used to secure the cement head. With casing at bottom, circulate one-and-half hole volume minimum at maximum possible rate (5 bpm) with rig pump. Start casing rotation at 20rpm during this conditioning period. Condition the mud to achieve Plastic viscosity Pv < 30 cP and a yield point Yp <10. Batch mix DensCRETE* slurry and MUDPUSH II* Once mud circulation is completed, switch surface lines to cementing line. Pump 5 bbls of MUDPUSH II @ 4 bpm. Pressure test surface lines to 5000psig. Monitor for 5 minutes minimum. Pump MUDPUSH II* spacer as per the design at 6bpm, rotate the casing at 20rpm Pump 175bbls of 18.80ppg DensCRETE* cement slurry at 6pm, rotate the casing at 20rpm Drop drill pipe wiper dart from liner cement head. Pump 5 bbls of MUDPUSH II* to flush the line. Check for plug departure. Displace with the following schedule: a. Pump remaining 5bbls of MUDPUSH II* behind, pump at 6bpm, rotate the casing at 20rpm b. Followed with 100bbls of WBM, pump at 6bpm, rotate the casing at 20rpm c. Followed with 50bbls of MUDPUSH II* at 5bpm, rotate the casing at 20rpm d. Followed with 90bbls of WBM at 3.5bpm, rotate the casing at 20rpm e. Staged down to 2bpm for the final 72.1bbls of WBM, STOP casing rotation Bump the plug at 3500psig. If the plug did not bump, DO NOT over displace more than 2.18bbls (half shoe track volume) Hold the pressure for 15 minutes. Bleed off the pressure back to displacement tank and check if float equipment is holding. Proceed with JX NOEX program to set liner top packer Pull out to 2600m-MD, reverse circulate the excess cement until DP is clean. (7bpm for 60minutes)

Page 28 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services If required to do inflow test /pressure test. It is recommended to do while cement is on the liquid state. So it does not disturb the set cement properties. Please refer to UCA/SGSA chart in the lab report section.

50 psi compressive strength

Top of liner condition 38:44hrs after cement in place

Casing shoe condition 09:51hrs after cement in place

WOC. Note: This job procedure is based on the best available data prior to actual job execution. Accurate well data, equipment/tool specification, volumes and job procedure are to be confirmed and agreed at well site before starting the job.

** CEMENT UNIT MUST RECORD ALL PUMPING PRESSURE**

Page 29 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Contingency Plans CEMENT SLURRY DENSITY TOLERANCE  Cement slurry will be batch mixed, and density will be verified before pumping down hole.  If difficult to maintain slurry density in acceptable tolerance, report to town. Co-man and engineer in town to decide to either continue the job or to cancel. PRESENCE OF GAS OR FORMATION INFLUENCES  Circulate bottoms up to condition mud and remove gas.  Measure mud density at entry and exit to verify that they are the same, and proceed with cementing.  If the densities are different after circulating, notify management. LEAK DURING PRESSURE TEST  Do a low pressure test to check for leaks. If any, release pressure, disconnect connection, inspect the WECO seal, orings and/or threads, and reconnect connection.  If the leak does not dissapear, replace the component with a leak. CAVITATION IN THE TRIPLEX  Stop pumping and switch to front pump (max. rate capped at 5.8bpm) LEAKS DURING CEMENTING OPERATION  Release pressure, repair the problem. DO NOT leave cement under static condition for more than 30minutes.  If the problem can NOT be solved, and impossible to continue pumping, switch to rig pump to displace. CEMENT UNIT FAILURE WHILE DISPLACING  Switch to rig pumps to displace. Verify displacement strokes and caliberate rig pump efficiency with co. man, driller, OIM, and cementer prior to restarting displacement, taking any volume already displaced by cement unit into account. Continue recording the pressure using the cement unit until the job finished. PLUG NOT BUMPED  Displace max ½ of shoe track volume. Do not overdisplace.  If the plug is not bumped, but floating equipment hold after bleeding of pressure, ensure that the cement is fully set before any attempt to pressure test casing. PRESSURE LIMIT IS REACHED  Bleed off pressure, resume pumping at lower rate. FLOATS NOT HOLDING  If floats do not hold, pump returned fluid volume back into the well and close cement head valve at surface. Continue monitor the pressure until cement sets. Refer to lab report, time for slurry to develop 50 psi CS. (09:51 hrs)

Page 30 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services LINER TOP PACKER DID NOT SET  Job design takes into account a maximum of 60minutes to set liner top packer  Should the first attempt fails, JX NOEX has contingency plan to run another back up packer  Consider cement TT and UCA/SGSA test result MANAGEMENT OF CHANGE  If there is any change or deviation from the original planned job, inform the line management immediately. Request for management of change (MOC).  Emergency contact: Fesarama Felaza – SLB Cementing Engineer – Mob: +6 012 329 3466 JX NOEX Engineer on duty

Page 31 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Software Simulations

1.6

Surface Pressure and Return Rate

0.2

0.4

Surf. Press. (psi) (x 1000) 0.6 0.8 1.0 1.2

1.4

Calc. Pump Press. Calc. CemHP

0

25

50

75 Time (min)

100

125

150

Surface pumping pressure simulation

7

(The calculated pumping pressure takes into account the friction pressure in the surface line.)

0

1

2

Flow Rate (bbl/min) 3 4

5

6

Q In Q Out

0

40

80 Time (min)

120

160

U-Tube simulation at surface

During the job, compare the actual return versus the prediction above (assuming actual and planned pumping schedules are the same). Page 32 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Depth = 3766 m Frac Pore Hydrostatic Dynamic

17.4 17.7

18.0

18.3

Ann. Pressure (lb/gal) 18.6 18.9 19.2 19.5

19.8

20.1 20.4

ECD at the Shoe during Cement Placement

0

25

50

75 Time (min)

100

125

150

ECD at the Previous Shoe during Cement Placement

17.2

17.6

18.0

Ann. Pressure (lb/gal) 18.4 18.8 19.2

19.6

20.0

20.4

Depth = 2820 m Fluids at 3766 m Frac Pore Hydrostatic Dynamic

0

Page 33 of 45

25

50

75 Time (min)

100

Engkabang West 1, 7" Liner, Rev Rev. 3

125

150

Miri Cementing Services

Temperature Simulation

Left: Temperature plot at the end of the cement placement. Right: Temperature seen by the cement particles (first sack and last sack of cement) when pumped downhole. The temperature simulations above incorporate the following data The well starts at the mud circulation final temperature profile prior to cementing. Static temperature, sea temperature, sea current are defined as per section 2 Pre-job Mud circulation 180.0 min @ 6.0 bbl/min Pre-job Mud temperature (injection) 59 degC Slurry Temperature (injection) 95 degF Displacement fluid temperature (injection) 95 degF Page 34 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Mud Removal

90

120

MUDPUSH II WBM DensCRETE*

60

Friction Pressure (psi/1000ft)

150

Annulus ID : 7.000 in - OD : 9.040 in

0.8

1.2

1.6

2.0

2.4

2.8 3.2 3.6 4.0 Flow Rate (bbl/min)

4.4

4.8

5.2

5.6

Frictional Hierarchy vs. flow rate

[Friction hierarchy between the pumped fluids versus the pumping rate (sensitivity analysis)]

Page 35 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

6.0

6.4

Miri Cementing Services

Formation Flow Risk Analysis As per the API RP 65, one criterion to assess the formation flow risk is the Critical Static Gel Strength (CSGS) of the slurry in front of the potential flowing formation. The lower the CSGS the higher the formation flow risk. The CSGS can be calculated with the following equation: Where: OBP = PCement + PMud - PFormation; is the initial calculated overbalance pressure (psi); 300 is a conversion factor; L is the length of the cement column above the flow zone (ft); Deff is the effective diameter (in.) = DOH – Dc; Dc is the outside diameter of the casing (in.); DOH is the diameter of the open hole (in.). API RP 65 Part II also states that ”Wellbores have variable hole diameters and contain multiple fluids (drilling fluid, spacer, lead cement, tail cement) in the annulus. Many wellbore sections have more than one potential flow zone to be evaluated. For these reasons, it is recommended that a computer program be used to accurately calculate CSGS.” The GasMigrationAdvisor (GMA) software calculates the CSGS taking into account the wellbore caliper (if available) and also the static gel strength of the fluids above the cement placed in front of the potential flow zones. Current mud rheology data showed a relatively high gel strength value and consequently drops the CSGS to zero (critical). One of the efforts to increase the CSGS to a more manageble value is by applying back pressure after cement in place. However, the liner is equipped with a top packer, and will be activated soon after cement is in place. By setting the top packer, there is no possible way of applying pressure to increase CGSG value. It is recommended under this case, to utilize a low porosity cement system (CRETE*) with GASBLOK* technology and minimize static gel strength transition time. The GasMigrationAdvisor (GMA) software calculates the CSGS taking into account the wellbore caliper (if available) but also the static gel strength of the fluids above the cement placed in front of the potential flow zones. ZONE Gas Zone 1

Top (MD)

Bottom (MD)

CSGS (GMA)

2818

3800

0 lbf/100ft2

GMA risk versus PDL value: Pressure Decay Limit risk is HIGH *.(*) based on formation pressures provided on this report

API recommended CGSP Time from 75 to 500lbf/100ft2

Page 36 of 45

< 45 min 13 min

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

WELLCLEAN II Simulation (x 1000) psi %

m 0

020

540

10 60

(x 1000) psi 15 80

0 100

2510

% 5015

75

100

Hydrostatic Mud Contamination Frac Uncontaminated Slurry Pore

4000

2000

Hydrostatic Std Betw . Cent. Min. Hydrostatic Cement Coverage Max. Dynamic Min. Dynamic Frac Pore

05

Fluid Sequence

Dynamic Well Security Cement Coverage

Static Well Uncontaminated Security Slurry

The Fluid Concentrations map (left) shows the fluid concentration, i.e. the potential contamination between fluids. The Risk Mud on the Wall map (right) shows the risk of leaving a thin film of mud on the wall.

Page 37 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Contamination Assesment

In a liner job, it is critical to evaluate slurry contamination potential, as there is no physical barrier in between spacer and cement slurry as in a conventional two plug casing jobs. Spacer contamination in to cement slurry is likely expected in this condition. Simulation has been run to ensure that we have sufficient low contaminated cement coverage, and hence good zonal isolation. Simulations have shown with 175bbls of DensCRETE* slurry, under the assumed hole size we will have 1120m-MD of low contaminated cement.

Page 38 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Laboratory Reports

Page 39 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Page 40 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Thickening Time Test Ramping

-

In this time (min)

Do this

To this (degF)

0 31 36

Start con. Ramp To Ramp To

95 230 260

And this (psi) 1500 12200 12200

180 minutes of batch mix time. - ON motor for 215 mins, then stop for 10 mins (simulating droping dart) ON for another 160 minutes, then OFF motor for 60 minutes (simulating setting packer) - ON until set

Page 41 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

UCA/SGSA done at casing shoe

Static gel strength 75lbf/100ft2 100lbf/100ft2 500lbf/100ft2

Time 09:49 09:54 10:02

1. 180 mins of batch mixing 2. Conditioning to simulate placement as per LAR: a. 62min to 237degF/12200psig b. 112min to 270degF/12200psig c. Keep running for 60min 3. UCA/SGSA a. 1440min to 314degF/11250psig

Page 42 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Compressive Strength 50psi 500psi 4000psi

Time 9:51 10:22 30:00

Miri Cementing Services

UCA/SGSA done at Top of Liner UCA at TOL at 239 degF

Instrument: SGSA 3 Test Start: 2/1/2014 6:18:15 PM Algorithm: Compressive strength type B (more than 14 lb/gal) Algorithm: Static gel strength Additives: D206=0.05 + D700=1.30 + D701=0.060 + D080A=0.010 + D150=0.135 + FW Comments: D153=0.30% and D157=15%

400

360

4000

4000

3500

3500

3000

3000

Test Stop: 2/4/2014 2:58:26 AM 50 psi: 38:44:00 500 psi: 41:44:00 75 lb/100ft2: 37:13:30 100 lb/100ft2: 37:13:30 500 lb/100ft2: 37:13:30

320

200

160

2500

2000

1500

Static Gel Strength (lb/100ft2)

240

Compressive Strength (psi)

Temperature (°F)

280 2500

2000

1500

120 1000

1000

500

500

0

0

80

40

0

0

CHANDLER ENG INEERING

Static gel strength 75lbf/100ft2 100lbf/100ft2 500lbf/100ft2

15

30 Time (HH)

Test File Name: 7in Liner 18.80ppg SGSA 239degF Printed: 2/5/2014 10:44:54 AM

Time 37:13 37:13 37:13

1. 180 mins of batch mixing 2. Conditioning to simulate placement as per LAR: a. 18min to 180degF/12200psig b. 54min to 270degF/12200psig c. Keep running for 60min d. Cool down to 239degF/800psig within 75 min 3. UCA/SGSA run at 239degF/8000psig

Page 43 of 45

45

Engkabang West 1, 7" Liner, Rev Rev. 3

60

Page 1

Compressive Strength 50psi 500psi 2500psi

Time 38:44 41:44 50:00

Miri Cementing Services

Page 44 of 45

Engkabang West 1, 7" Liner, Rev Rev. 3

Miri Cementing Services

Mud Properties Data WATER-BASED MUD DMR No. 229 Operator : Report For : Well Name : Contractor: Report For :

JX NIPPON EXPLORATION Field/Area : Da n / Bri a n Description : Engka ba ng Wes t 1 Location : Na bors Water Depth : Les l i e Lopez Rig Name :

DRILLING ASSEMBLY 2475 m, 5.-in DP/ ID 4.276 269 m, 5.5-in HWDP/ ID 3.25 10 m, 7.-in Jar/ ID 2.75 56 m, 6.75-in DC/ ID 2.5 4 m, 8.375-in Mill Assy/ ID 2.25

Sample From FlowLine Temp Depth/TVD Mud Weight /Temp Funnel Viscosity Rheology Temp R600/R300 R200/R100 R6/R3 PV YP 10s/10m/30m Gel API Fluid Loss HTHP Fluid Loss Cake APT/HT Uncorr Solids Oil/Water Sand MBT pH / Temp Alkal Mud (Pm) Pf / Mf Chlorides Hardness (Ca++) KCL Polyamine Btm Hole Circ Temp

NaCl KCl Low Gravity High Gravity Corrected Solids Average SG K+ (KCL)

BIT INFORMATION Nozzles 0 1/32" TFA 0.000 Bit 8.5-in Flat Mill Assy CASING 30.-in @59 m (59 TVD) 26.-in @167 m (167 TVD) 20.-in @956 m (953 TVD) 13.625-in @2219 m (2099 TVD) 9.875-in @2818 m (2658 TVD)

Pump Make Pump Liner x Stk Pump Capacity bbl/stk Pump stk/min Flow Rate Pump Pressure Bottoms Up Total Circulation Mud in Hole Annulus Volume 446

MUD PROPERTIES Active 21:30 Active 14:30 °C m lb/gal s/qt °C

3767 / 3564 18.10 @ 37 68 66 86 / 58 46 / 35 12 / 11 cP 28 lb/100ft² 30 lb/100ft² 13 / 33 / 37 cc/30min 4.8 cc/30min 17.4 @ 150 1/32" 2/3 %Vol 40 %Vol / 60 %Vol 0.1 lb/bbl 5.25 10.5@28 4.2 4.0/8.2 mg/L 32,000 280 %/Wt 3. % 1. °C

%Wt %Wt %Vol %Vol %Vol mg/l

2.3 3.7 5.8 32.9 38.7 4.04 20,000

HSE Participation Daily 2

Observation Cards Submitted

3767 / 3564 18.10 @ 41 67 66 86 / 58 46 / 35 12 / 11 28 30 13 / 33 / 37 4.8 17.4 @ 150 2/3 40 / 60 0.1 5.25 10.5@28 4.2 4.0 / 8.2 32,000 280 3. 1.

2.3 3.7 5.8 32.9 38.7 4.04 20,000

Cumulative 224

MUD REMARKS AND TREATMENT Periodically circ active mud volumes via mix pumps.

TIME DISTRIBUTION Last 24 hrs Rig Up/Service 9 Drilling Tripping 14.5 Circulate 0.5 BOP Testing

Page 45 of 45

SK333 Expl ora ti on Ons hore Ba ra m Del ta 0m Na bors 503

LOSSES (bbl) / 2066 / 10 / 30 / Left in Ho le / Other / 65 Dispo sed / 346 Co ntaminated / Shakers Evapo ratio n Centrifuge Fo rmatio n

Depth/TVD : Date : Spud Date : Mud Type : Activity :

3767 m / 3564 m 2/11/2014 7/6/2013 ENVIROTHERM NT Ci rcul a te Btms Up

CIRCULATION DATA WIRTH WIRTH WIRTH 5x12 in 5x12 in 5x12 in 0x0 in 0.0692 0.0692 0.0692 65@95% 65@95% 0@95% 0@0% 378 gal/min Depth Drilled Last 24 hr 2065 psi m 49.6 min 6448 stk Volume Drilled Last 24 hr 181.9 min 23642 stk bbl Pipe Below Bit Active Pits Total Circ 155 220 1036 1637 PIT STATUS PIT WT (ppg) VOL (bbl) Remark Suction 1 18.1 185 Activ e Suction 2 18.1 185 Activ e Intermediate 1 18.1 289 Activ e Intermediate 2 18.1 69 Reserv e Reserv e 1 18.1 142 Reserv e Reserv e 2 18.1 252 Reserv e Slug Pit Reserv e Sand Trap 1 18.1 98 Activ e Sand Trap 2 18.1 98 Activ e Settling 1 18.1 103 Activ e Settling 2 18.1 78 Activ e Premix 1 20 600 Reserv e Premix 2 20 600 Reserv e Premix 3 20 600 Reserv e MUD PROPERTY SPECS Spec Actual Mud Density lb/gal 16.0 - 17.7 18.10 Viscosity sec/qt 60-80 68 PV cP ALAP 28 YP lb/100ft² 15-55 30 6 RPM 10 - 18 12 API Fluid Loss cc/30min <6.0 4.8 MBT lb/bbl <10 5.25 LGS % <6 5.8 pH 10-10.5 10.5 KCl % 3-7 3. KLA-STOP % 3-4 1. VOLUME ACCOUNTING (bbl) Daily Cum. Section Losses 3908 Built Base Fluid Water 2476.9 Chemical 1838.3 Total 4315 Received Backloaded Start Volume End Volume 4034 4034 SOLIDS CONTROL EQUIPMENT Last 24 hr Type Model/Size Hrs Used 518 FVS Centrifuge 518 High-Volume FLC 513 230/230/230 FLC 513 200/200/230 1.0 FLC 513 230/230/230 1.0 FLC 513 230/230/230 12.0

DRILLING REMARKS Trip ou of Hole f/ 1707 to 254m RCJB Fishing Assy. L/D tools. PJSM. R/D Wireline Shive from crown. Service Top Drive. P/U BHA & M/U Fishing Assy, Flat Mill & Junk Basket. Trip in hole, filling every 10stnds. Circ & condition Btms up @ 2813m with 380GPM. MW in & Out @ 18.1ppg.

np/na Kp/Ka Bit Pressure Loss/ % Bit HHP/HSI Jet Velocity MUD ENGINEER Timothy T. Ragendra Sandhu

Engkabang West 1, 7" Liner, Rev Rev. 3

RHEOLOGY & HYDRAULICS 0.643 Va Pipe 0.904 Va Collars 8.69/10 Cva Pipe / 0. Cva Collars / 0. ft/s ECD at Shoe RIG PHONE

182 ft/min 306 ft/min 325 ft/min 406 ft/min 19.02 ppg PROJECT ENGINEER Thony Maratin