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PETE 411 Well Drilling

PETE 411 Well Drilling. Lesson 33 Directional Drilling. Directional Drilling. I. II. III. When is it used? Type I Wells Type II Wells Type III Wells Directional Well Planning & Design Survey Calculation Methods. Read ADE Ch.8 (Reference).

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PETE 411 Well Drilling

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  1. PETE 411Well Drilling Lesson 33 Directional Drilling

  2. Directional Drilling I II III When is it used? Type I Wells Type II Wells Type III Wells Directional Well Planning & Design Survey Calculation Methods

  3. Read ADE Ch.8 (Reference) HW #17due 11-27-02HW #18due 12-06-02

  4. Inclination Angle q, a, I Direction Angle f, e, A

  5. Max. Horiz. Depart. ?

  6. Type I Type II Type III

  7. r I DL Dy r I Dx

  8. Fig. 8.11

  9. N18E S23E Azimuth Angle N55W S20W

  10. Example 1: Design of Directional Well Design a directional well with the following restrictions: Total horizontal departure = 4,500 ft True vertical depth (TVD) = 12,500 ft Depth to kickoff point (KOP) = 2,500 ft Rate of build of hole angle = 1.5 deg/100 ft Type I well (build and hold)

  11. Example 1: Design of Directional Well (i) What is the maximum hole angle required. (ii) What is the total measured depth (MD)? (MD = well depth measured along the wellbore, not the vertical depth)

  12. (i) Maximum Inclination Angle

  13. (i) Maximum Inclination Angle

  14. (ii) Measured Depth of Well

  15. (ii) Measured Depth of Well

  16. * The actual well path hardly ever coincides with the planned trajectory * Important: Hit target within specified radius

  17. What is known? I1 , I2 , A1 ,A2 , DL= DMD1-2 Calculate b = dogleg angle DLS = b*100/DL DLS = dogleg severity

  18. (20)

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