Drilling Manual Planning (1)

Quartz School for Well Site Supervisors Module – 8 Directional Drilling

Section – 10 Manual Planning

Manual Planning Tips for Well Planning – Objectives: • Understand the triangles needed for planning: – Simple “J” shaped Wells – “S” shaped Wells – Double Build Wells • Plan wells in the simplest method available

2 IF. 10/23/2009

Rev 1

Manual Planning Overview Manual well planning is essentially the manipulation of right-angle triangles to compare differences in Displacement & TVD to place each point in the wellbore.

The Tips are designed to help you determine which points you need to connect to build the correct triangles to find the solution to the problem. 3 IF. 10/23/2009

Rev 1

Manual Planning Keys for Triangles • Read and understand question properly • Use all the data in your drawing and equations • Draw large and clear diagram with right scale • Find right triangles • Know and use all triangles Tips • Connect triangles together to find the solution to the problem

4 IF. 10/23/2009

Rev 1

Manual Planning Exercise “J” or Slant Well Given Information: Target Location= 1638.3 ft S and 1147.15 ft W Target’s TVD = 8500 ft KOP = 1981 ft Build Radius = 2291.83 ft

• • • •

Solve for the following variables: 1. 2. 3. 4. 5. 6. 7.

Profile drawing Well Coordinate Build up rate (BUR) MAX hold angle End of build (EOB) true vertical depth (TVD) EOB Measured Depth Total MD to the target

5 IF. 10/23/2009

Rev 1

Vertical Section and Plan View Drawings Given Information: • Target Location= 1638.3 ft S and 1147.15 ft W • Target’s TVD = 8500 ft • KOP = 1981 ft • Build Radius = 2291.83 ft

Solve for the following variables: 1. 2. 3. 4. 5. 6. 7.

Profile drawing Well Coordinate Build up rate (BUR) MAX hold angle End of build (EOB) true vertical depth EOB Measured Depth Total MD to the target

6 IF. 10/23/2009

Rev 1

Manual Planning Exercise “S” Type Well Given Information: • • • • •

Target Location= 3500 ft at 235 azm Target’s TVD = 12,000 ft KOP = 6084 ft Build up rate (BUR) = 3 grd/100ft Drop off rate (DOR) = 2 grd/100ft

Solve for the following variables: 1.Profile drawing 2.Well Coordinate 3.Build and drop radius 4.MAX hold angle 5.EOB TVD 6.EOB MD 7.EOB displacement 8.Start of drop (SOD) MD 9.SOD TVD 10.SOD Displacement 11.Total MD to the target 7 IF. 10/23/2009

Rev 1

Vertical Section and Plan View Drawings Given Information: • • • • •

Target Location= 3500 ft at 235 azm Target’s TVD = 12,000 ft KOP = 6084 ft Build up rate (BUR) = 3 grd/100ft Drop off rate (DOR) = 2 grd/100ft

Solve for the following variables: 1.Profile drawing 2.Well Coordinate 3.Build and drop radius 4.MAX hold angle 5.EOB TVD 6.EOB MD 7.EOB displacement 8.Start of drop (SOD) MD 9.SOD TVD 10.SOD Displacement 11.Total MD to the target

8 IF. 10/23/2009

Rev 1

Manual Planning Tip 1 This Tip applies to “J” profile wells only.

Center of Radius of Curvature

A line needs to be drawn between the target and the Center of Radius of Curvature.

Target 9 IF. 10/23/2009

Rev 1

Manual Planning Tip 1 This Tip applies to “J” profile wells only. Center of Radius of Curvature

This then needs to be triangulated by comparing the Displacement and TVD

10 IF. 10/23/2009

Rev 1

Target

Manual Planning Tip 1 This Tip applies to “J” profile wells only.

Center of Radius of Curvature

This can also be triangulated by comparing the Displacement and TVD the other way However these angles don’t add up to either 90 ° or 180° making the calculation more difficult 11 IF. 10/23/2009

Rev 1

Target

Manual Planning Tip 1 This Tip applies to “J” profile wells only.

Center of Radius of Curvature

Whereas these angles add up to 180° making the calculation easier to work through

12 IF. 10/23/2009

Rev 1

Targe t

Manual Planning Tip 2 This Tip applies to “Horizontal ” profile & double build wells. Here we look at a double build: A line needs to be drawn between the Centers of Radius of Curvature for each curve. 13 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Tip 2 This Tip applies to “S” profile & double build wells. Here we look at a double build: These then also need to be triangulated by comparing the Displacement and TVD 14 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Tip 2 This Tip applies to “S” profile & double build wells. Here is an “S” well:

A line needs to be drawn between the Centers of Radius of Curvature for each curve. 15 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Tip 2 This Tip applies to “S” profile & double build wells. Here is an “S” well:

This then needs to be triangulated by comparing the Displacement and TVD 16 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Tip 3 This Tip applies to “S” profile & double build wells. Here is an “S” well:

The Radius of Curvature of one curve is projected onto the other R of C as an addition, as in this case, or a subtraction. 17 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Tip 3 This Tip applies to “S” profile & double build wells. Here is an “S” well: This is then triangulated by connecting the outside end to the Center of Radius of Curvature of the other curve. 18 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Tip 3 This Tip applies to “S” profile & double build wells. Here is a double build well:

Center of Radius of Curvature 1

The Radius of Curvature of one curve is projected onto the other R of C as, in this case, a subtraction. 19 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 2

Manual Planning Tip 3 This Tip applies to “S” profile & double build wells. Here is a double build well: This is then triangulated by connecting the inside end to the Center of Radius of Curvature of the other curve. 20 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Tip 4 This Tip applies to all well profiles. Key Points in the well path need to be triangulated back to the nearest Center of Radius of Curvature by comparing relative Displacements and TVDs. 21 IF. 10/23/2009

Rev 1

Center of Radius of Curvature 1

Center of Radius of Curvature 2

Manual Planning Summary There are 4 Tips to Manual Well Planning: •

For “J” wells –

•

•

A line from the target to the Center of Radius

For “S” & Double Build Wells –

A line joining the two centers of radius

–

A projection of one radius of curvature onto the other (+/-)

For all well profiles –

22 IF. 10/23/2009

Triangulate back to the nearest Center of Radius by comparing relative displacement & TVD Rev 1