Gas Volume Requirements for Underbalanced Drilling : Deviated Holes

by Guo, Boyun; Ghalambor, Ali

• ISBN13: 9780878148028
• ISBN10: 0878148027
• Format: Hardcover
• Copyright: 2002-09-01
• Publisher: Pennwell Corp

Summary

Written to aid drilling engineers and drilling supervisors in underbalanced drilling (UBD) operations. Contributes material on multiphase flow in deviated and horizontal well drilling.

Author Biography

Dr. Boyun Guo is an Associate Professor in the Petroleum Engineering Department at The University of Louisiana at LaFayette Dr. Ali Ghalambor currently serves as Petroleum Department Head at The University of Louisiana at LaFayette

Table of Contents

Preface	xi
List of Symbols	xv
Underbalanced Drilling Basics	1	(18)
Benefits of Underbalanced Drilling	2	(3)
Underbalanced Drilling Techniques	5	(3)
Limitations of Underbalanced Drilling	8	(2)
Selection of Underbalanced Drilling Techniques	10	(5)
Volume Requirements	15	(2)
References	17	(2)
Air, Gas, Mist, and Unstable Foam Drilling	19	(52)
Criteria for the Minimum Gas Volume Requirement	20	(1)
Minimum Kinetic Energy	20	(2)
Minimum Velocity Criterion	22	(3)
Discussion of Criteria	25	(3)
Direct Circulation	28	(1)
Vertical Hole	29	(15)
Slant-Hole	44	(4)
Deviated Hole	48	(5)
Vertical-Deviated-Slant Combined Hole	53	(5)
Reverse Circulation	58	(3)
Correlations for Gas Volume Requirement	61	(1)
Vertical Hole	61	(3)
Deviated Hole	64	(3)
References	67	(4)
Stable Foam Drilling	71	(28)
Stable Foam Drilling Operations	72	(1)
Volumetric Gas Flow Rate Requirement	73	(1)
Criteria	73	(3)
Hydrostatic Pressure	76	(4)
Frictional Pressure Loss	80	(6)
Procedure	86	(10)
References	96	(3)
Aerated Liquid Drilling	99	(28)
Aerated Liquid Drilling Operations	100	(1)
Volumetric Gas Flow Rate Requirement	101	(1)
Criteria	101	(2)
Borehole Pressure	103	(15)
Volume Requirement	118	(4)
The Optimum Liquid and Gas Rates	122	(1)
References	123	(4)
Selecting Compressor Units	127	(46)
Pipe Flow	128	(1)
Air, Gas, Mist, and Unstable Foam	128	(2)
Stable Foam	130	(4)
Aerated Liquid	134	(2)
Nozzle Flow	136	(1)
Air, Gas, Mist, and Unstable Foam	136	(3)
Stable Foam and Aerated Liquid	139	(1)
Examples for Compressor Selection	140	(31)
References	171	(2)
Field Applications	173	(16)
Liquid-Gas Rate Window (LGRW)	173	(1)
Description of the LGRW	174	(1)
Preparation of the LGRW	174	(7)
Field Case Studies	181	(1)
Air, Gas, Mist, and Unstable Foam Drilling Cases	181	(2)
Stable Foam Drilling Case	183	(2)
Aerated Liquid Drilling Cases	185	(3)
References	188	(1)
Appendix A Required Air Flow Rates for Air--Drilling Vertical Holes	189	(16)
Appendix B Required Gas Flow Rates for Gas--Drilling Vertical Holes	205	(14)
Appendix C Required Air Flow Rates for Air--Drilling Deviated Holes	219	(8)
Index	227