Hal Drilling Sharing Session_aceh_print

Geothermal Drilling Sharing Session Unsyiah - Aceh Dimas Widianto/ Rudi Siburian 12 November 2015

Agenda Halliburton Life Rules Halliburton Project Management Drilling Geothermal Well  Challenges  Planning  Execution Drilling Engineering  Drilling Fluid  Directional Drilling  Cementing  Drilling Bit General Discussion

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Project Management in Halliburton Baroid

Drill Bits and Services

Landmark Software and Services

Artificial Lift

Drilling and Evaluation

Sperry Drilling

Testing and Subsea

Cementing

Completion and Production

Wireline and Perforating

Completion Tools

Consulting

Project Management

Integrated Asset Management

Consulting and Project Management

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Boots & Coots

Multi-Chem

Production Enhancement

Consulting & Project Management Exploration

Development

Decommission

SOFTWARE & SERVICES FORMATION EVALUATION DRILLING – BITS, DIRECTIONAL, AND PERFORMANCE FLUIDS CEMENTING WIRELINE LOGGING PERFORATING SERVICES RESERVOIR TESTING & SAMPLING COMPLETIONS SAND CONTROL FRACTURING ACIDIZING RESERVOIR & FRACTURE MONITORING PRODUCTION CHEMICAL SERVICES CASED-HOLE SERVICES WATER MANAGEMENT ARTIFICIAL LIFT PIPELINE & PROCESS SERVICES DECOMMISSIONING & ABANDONMENT WELL INTERVENTION REAL-TIME CENTERS & SERVICES

CONSULTING & PROJECT MANAGEMENT

Exploration

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Well Construction

Completions

Production

Abandonment

Halliburton Project Management

Project Activities Past Experience Active Opportunities

Founded:

2015

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1995

Employees 636

Disciplines

Operational Countries

Project Managers 24 Well Engineers Rig Supervisors Logistics & Procurement

Services Integrated Project Management Integrated Services

Rig Participation 80Drilling Rigs 21 Workover Rigs 7 Rigless spreads

Halliburton Geothermal IPM Team Strengths  HAL PSLs (Sperry, Baroid, Bits, Cementing, Wireline) most experienced in Indonesian Geothermal Industry. 3rd Party Well Testing contractor world class within geothermal market  Strong HPM geothermal engineering and field operations team has been built.  Strong procurement, logistics, HSE, and F&A support  Large infrastructure positioned for future geothermal operations in Indonesia

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Drilling Geothermal Wells - Challenges ▌ Severe lost circulation environment  Hole cleaning challenges  Stuck pipe risks  Compromised primary cementing ▌ High Temperature – up to 550 to 600 deg F ▌ H2S and CO2 Gas ▌ Difficult to drill lithology are the norm in geothermal drilling  Hard & Abrasive, Volcanic Rock  Sloughing formations/clays ▌ Cement & Casing Integrity – Thermal Cyclic

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Thermal Cycle of Geothermal Well

Temperature (deg F)

Production

Initial

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Cooling, logging, work over, etc

Thermal Cycle of Geothermal Well

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Typical Well Schematic

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Drilling Geothermal Wells – Planning

▌Engineering  Casing Design  Directional Drilling  Drilling Fluid  Cementing  Drilling Bits  Air Drilling .

Drilling Geothermal Wells – Execution

Wellpad / Location Final Preparation

Conductor Setting

Run Casing, Cementing, etc

Actual Drilling Activities

Rig Move

Pre-Spud Meeting

Well Testing

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Rig Up

Ready to Spud, Inspection

Rig Down & Move Out

Drilling Fluid

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Drilling Fluid – Mud Formulation

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Drilling Fluid Hole Cleaning

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Directional

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What Can Go Wrong ??

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Well Trajectory - Example

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Spider Plot

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Electromagnetic telemetry Drillpipe acts as center Conductor

Earth’s Formations act as lossy outer conductor

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Does not require a solid column of fluid for data transmission

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Battery powered, does not require pumps on for operation

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Full two-way communication

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Electromagnetic telemetry Benefits  Independent of mudflow  No moving parts  Higher data rates  Less limited by LCM Application  Currently limited to onshore  Depth limitation  Advantage for underbalanced operation .

Cementing

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1st Lost Circulation “Responding to minimize Non-Productive Time” ▌ Real-time Accurate Wellbore-Temperature Profile It can be used to make the necessary adjustments to the cement-slurry design to minimize wait-on-cement time, resulting in substantial cost savings. ▌ Rapid Cement Setting Utilize 2 – 3% CaCl2 with regular cement slurry, prepare sensitivity test. ▌ Reactive Pill 25 lb/bbl bentonite + 10% CaCl2, pump ahead prior cement plug ▌ Reactive Spacer FLO-CHEK® System (externally catalyzed, soluble silicate system) ▌ Or, we can use the “advance solution” – Use SentinelCem™ as spacer ahead of the slurry

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2nd Extreme High Temperature “Aggressive temperature changes during drilling & production ” ▌ High Temperature Retarder (SCR-500L)  Synthetic material – increase the predictability of thickening time  High bottom hole circulating temperatures ranging from 200° - 330°F  The thickening time decreases proportionally as the temperature increases – high sensitivity  Wide compatibilities with other chemicals ▌ Strength Retrogression Additives (SSA-1)  Maintain low permeability and high compressive strength under hightemperature conditions  Use above 230°F static temperature  Technology center is available to test the slurry system for accurate SSA1 concentration .

3rd Cement & Casing Integrity “Long Term Cement Sheath Failure,High Temperature Exposure”

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ISSUES

BENEFITS

An initially competent cement sheath can fail

Long-Term Zonal Isolation

Flow pathways are established affecting production

Maximize Production

Impossible to effectively repair

Minimize Remedial Costs

Environmental Impact

Reduced Environmental Impact

3rd Cement & Casing Integrity “Prolong the Life of the Well – Stress Analysis” Formation Properties

▌ Cement hydration ▌ Shoe pressure testing ▌ Fracturing / stimulation ▌ Completion fluid change

Cement Properties

▌ Injection and production ▌ Evacuation / unloading ▌ Kill Well

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3rd Cement & Casing Integrity “Prolong the Life of the Well WellLife® and ElastiCem™” ▌ 2D Crush Compressive Strength Test

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Drilling Bit

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Roller Cones : TCI bits IADC 500 and above Traditionally used to drill geothermal wells…

Due to its crushing cutting action .

Roller Cones : TCI bits IADC 500 and above limitations…  Limited bit life due to seal and bearing systems  Limited bit life due to impact on its cutting structure  Lost Cones (Big Problem)

Tripping and remedial of the above relates directly to rig cost Hence, PDC is preferred….. if at all possible .

PDC (Polycrystalline Diamond Compact) Bit Traditionally cannot be used to effectively drill geothermal wells

Cutter Breakage historically thought to be Impact Damage

Due to its shearing cutting action .

PDC Historical Challenges Challenges - Bit life due to hard and varying formations - All roller cone TCI bits in this field in the first 7 wells prior to the PDC runs Solutions - DatCIsm (Design at Customer Interface) process - Understanding Costumer objectives - Collaboration with Costumer and Halliburton (bit designs, cutter selection) - Support execution of solutions (bit hydraulics etc) - SelectCutter™

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Performance Results PDC bit to drill the entire 12 ¼” section Offset bits (2x Roller Cone) drilled a total of 2,185 with 46.3 on bottom hours and an average ROP of 47.2 ft/hr 1x PDC Bit; 12¼ MM75DM Drilled a total of 2,191 ft (8193010ft) with 38.3 on bottom hours and an average ROP of 57.2 ft/hr. Pulled out in re-runable condition.

12 ¼” MM75DM Drilled a total of 2,191 ft with 38.3 on bottom hours and an average ROP of 57.2 ft/hr. Kicked off from vertical and built to 44° .

Performance Results The first PDC bit to drill the entire 8 ½” section and the longest ever footage drilled by an 8 ½” bit

8 ½” MM75D

Offset bits (4x roller cone bits) drilled a total of 3,500 ft with an average ROP of 34.3 ft/hr 8 ½” MM75D drilled a total of 4,674 ft with an average ROP of 46.7 ft/hr

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Saves a total of 2.9 drilling days

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