A study for development of a plan of depletion in a rich gas condensate reservoir: Anschutz Ranch East unit, Summit County, Utah, Uinta County, Wyoming

Conference · Sat Oct 01 04:00:00 EDT 1983 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5358227

Kleinsteiber, S W; Calvin, J W; Wendschlag, D D

The Anschutz Ranch East field is the largest hydrocarbon accumulation discovered to date in the Western Overthrust Belt. Analyses of reservoir fluid samples from the discovery well indicated that the fluid is a rich gas condensate with liquid dropout under reservoir conditions as high as 40 percent of the hydrocarbon pore volume. The proximity of the fluid dew point pressure to the original reservoir pressure dictated that a plan-of-depletion be established very early in the life of the field to avoid reservoir damage and the potential loss of significant liquid reserves. This requirement was further amplified by the fact that some of the depletion alternatives involved major front-end monetary commitments and long lead times for implementation. Using preliminary reservoir data together with compositional simulators, various depletion alternatives ranging from primary depletion to full pressure maintenance were evaluated. Variables examined in the study included such factors as type of injection fluid and injection-production well configuration. Full pressure maintenance using nitrogen preceded by a hydrocarbon-nitrogen gas buffer in an inverted nine-spot pattern was selected as the most attractive depletion method. This plan was approved by the working interest owners and state regulatory agencies and is currently being implemented.

• Research Organization: Amoco Production Co. USA
• OSTI ID: 5358227
• Report Number(s): CONF-8310121-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE12042
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
BUFFERS
CONDENSATES
ELEMENTS
ENHANCED RECOVERY
EXPLOITATION
EXPLORATORY WELLS
FEDERAL REGION VIII
FLUID INJECTION
FLUIDS
GAS CONDENSATE FIELDS
GAS CONDENSATE WELLS
GAS CONDENSATES
GEOLOGIC DEPOSITS
LIQUIDS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NATURAL GAS LIQUIDS
NITROGEN
NONMETALS
NORTH AMERICA
PETROLEUM DEPOSITS
PLANNING
RECOVERY
RESERVES
RESERVOIR ROCK
RESOURCE DEPLETION
RESOURCES
USA
UTAH
WELLS
WYOMING