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U.S. Department of Energy
Office of Scientific and Technical Information

Underbalanced drilling in the Piceance basin. Final report, June 1997

Technical Report ·
OSTI ID:565431

Underbalanced drilling technology is established and fairly well understood in some areas in the U.S. such as Appalachia. The primary objective of this cooperative project in the Piceance Basin was to use underbalanced drilling technologies to reduce rates of penetration such that significant cost reductions could occur. Fluids evaluated included air/mist, stiff foams and aerated muds. Underbalanced drilling was successful particularly in the surface hole; however, heaving shales in the Wasatch section were problematic.

Research Organization:
Chevron USA, Inc., Houston, TX (United States)
OSTI ID:
565431
Report Number(s):
PB--98-112303/XAB; CNN: Contract GRI-5095-210-3512
Country of Publication:
United States
Language:
English

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