Directinal Drilling Technology Instroduction.ppt

For reference

1. Introduction to
Directional Drilling
Khalifah Al-Amri
Senior Drilling & Workover Engineer

2. Outline
Definition
What Are Directional Wells ?
Directional Well Types
Why Drill Directionally?
Planning A Directional Well Path
How To Drill Directionally?
Horizontal Drilling
Complex Wells

3. Definition
Directional drilling is the science of deviating a
well bore along a planned course to a subsurface
target whose location is a given lateral distance
and direction from the vertical.

4. What Are Directional Wells ?
Directional wells are deviated
from vertical (straight)
Directional wells are drilled with
intentional control to hit a pre-
determined target:
inclination (angle)
azimuth (direction).
Think 3-D when directional

5. Vertical Type
Slant (J) Type
“S” Type Horizontal Type
Directional Well Types

6. Inaccessible Locations
Salt Dome Drilling Fault Controlling
Sidetracking
Why Drill Directionally?

7. Why Drill Directionally?

8. Planning A Directional Well Path
Kick Off Point
Build Up Rate
Azimuthal Direction
Inclination Angle
True Vertical Depth
Measured Depth
Horizontal Displacement
TVD EOWMD
KOP
HD
Inc
0 N
Dir

9. How To Drill Directionally?
Slide & Rotate Mode
Downhole Motor
Bent Sub
Fixed
Adjustable
Surveying Tool
Media of Transmission

10. Horizontal Drilling
Types of Horizontal Wells:
Long Radius (2°-8°/100’)
Medium Radius (8°-30°/100’)
Short Radius (30°-60°/100’)
Ultra Short Radius (60°-
200°/100’)

11. Horizontal Drilling
Vertical Wells
Horizontal Wells
Water Coning
Gas
Oil
Water
Gas Coning
Applications:
GasandWaterConing:
Longerhorizontaldrainholeincreasesthe
exposureofthepay-zone
Allowsahigherproductionrateatlower
drawdownpressureresultinginlessconing

12. OtherMajorApplications:
Maximum reservoir exposure
Naturally fractured tight reservoirs
Thin dry reservoirs
Less wells needed to develop a field
Horizontal Drilling

13. Complex Wells
Stacked Laterals

14. Complex Wells
Fishbone Wells

15. Complex Wells
Stacked Fishbone Wells

16. Complex Wells
Multiple-Branch Multilateral Wells