1. INSTRUCTOR © 2017, John R. Fanchi
All rights reserved. No part of this manual may be reproduced in any form without the express written permission of the author.
© 2004 John R. Fanchi All rights reserved. Do not copy or distribute.

2. To the Instructor
The set of files here are designed to help you prepare lectures for your own course using the text Introduction to Petroleum Engineering, J.R. Fanchi and R.L. Christiansen (Wiley, 2017)
File format is kept simple so that you can customize the files with relative ease using your own style. You will need to supplement the files to complete the presentation topics.

3. DIRECTIONAL DRILLING © 2017, John R. Fanchi
All rights reserved. No part of this manual may be reproduced in any form without the express written permission of the author.
© 2004 John R. Fanchi All rights reserved. Do not copy or distribute.

4. Outline Directional Drilling Technology
Applications of Directional Drilling

5. DIRECTIONAL DRILLING TECHNOLOGY

6. Well Orientation
Vertical
Well
Deviated
Well
Horizontal
Well

7. Directional Drilling – KOP
Kelly Bushing (KB) Elevation
Elevation = Ground Level + distance from ground to KB
Kick Off Point (KOP)
Depth where well starts deviating from vertical

8. Directional Drilling – Dog Leg
Dog Leg (DL)
Wellbore deviation measured in angle from vertical per unit of depth
e.g. degrees per 100 ft
vertical axis = 0°

9. Directional Drilling – Landing Point
Landing Point (LP)
Point where wellbore changes from deviated to lateral
Assume LP angle at target = 90° (vertical angle = 0°)
Underbuilt
Building less angle than needed to reach LP
Overbuilt
Building more angle than needed to reach LP
Horizontal
Overbuilt
Underbuilt
Target

10. Wellbore Trajectories: “J” and “S” Curves
“J” curve
Lake
“S” curve
KOP
Target

11. Wellbore Trajectories
“S” curve
Horizontal from slant hole
Slant hole
Short radius
Opposing Laterals
Medium radius
Stacked Laterals
Side-tracking from vertical wells
“J” curve
Long radius
Source:

12. Measurement-while-drilling (MWD)
Rotational speed of drillstring
Smoothness of that rotation
Type and severity of downhole vibration
Downhole temperature
Torque and Weight on Bit
Measured near drill bit
Mud flow volume
Source:

13. APPLICATIONS OF DIRECTIONAL DRILLING
© 2004 John R. Fanchi All rights reserved. Do not copy or distribute.

14. Horizontal Drilling Horizontal Drilling Radius Considerations
Short radius: 30’ – 60’ and > 20 ° /100’ build
Medium: 300’ – 500’ and 8° – 20 ° /100’ build
Long: > 500’ and < 8 ° /100’ build angle
Considerations
Shorter radius = shorter horizontal length
Shorter radius = more stresses on pipe
Short radius requires special tools

15. Sidetrack
JPT, Sept. 2012, pg. 57
WB = Wellbore
C = Completion

16. Extended Reach Drilling (ca. May 2011)
Industry Worldwide ERD envelope, SPE

17. Odoptu ERD Record (as of May 2012)
Odoptu development
9 ERD wells drilled from shore to offshore field
Well OP-11 set ERD record
12,345 m measured depth (MD)
1,784 m true vertical depth (TVD)
Well specs
30-in conductor driven to approx 90 m depth
Casings are 30-in, 18 5/8-in, and 13 5/8 in
9 5/8-in liner
8 1/2-in hole to TD
5 ½-in tubing to surface
Ref. pg , JPT summary of SPE , May 2012

18. Fishbone Well Pochahontas, West Virginia Coal Gas
Change in Gas Saturation
after 2 years depletion
Fishbone Production Well
20 x 20 Grid
Low – Blue
High – Red

19. Pad Drilling in Shale
Plan View
Well Pad
Stimulated
Region

20. QUESTIONS?
© 2004 John R. Fanchi All rights reserved. Do not copy or distribute.

21. SUPPLEMENT
© 2004 John R. Fanchi All rights reserved. Do not copy or distribute.