Ekofisk waterflood pilot

Conference · Sat Sep 01 04:00:00 EDT 1984 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:6142594

Thomas, L K; Dixon, T N; Evans, C E; Vienot, M E

This paper describes the evaluation of a waterflood pilot in the highly fractured Maastrichtian reservoir of the Ekofisk Field in the Norwegian sector of the North Sea. A four well pilot consisting of one water injector and three producers was initiated in the spring of 1981 and was concluded in mid 1984. A total of 21 million barrels of water was injected and water breakthrough occurred in two of the production wells. Simulation of waterflood performance in the pilot was conducted using a three-dimensional, threephase dual porosity model. Initial and boundary conditions were taken from a full three-dimensional, single porosity model of the reservoir. The pilot was conducted to determine the following information for the Maastrichtian: water cut performance versus time, water imbibition characteristics, and anisotropy. Results from this work have been incorporated into a full field waterflood study. Reservoir description included the determination of fractured areas, matrix block sizes, water-oil capillary imbibition, matrix permeability and porosity, and effective permeability. These data were derived from fracture core analysis, pressure transient tests, laboratory water-oil imbibition studies, repeat formation pressure test results, and open and cased hole logs. An excellent match of waterflood performance was obtained using the dual porosity model. Of particular interest are the imbibition characteristics of the Maastrichtian in the Ekofisk field and the character of the water cut performance of the producing wells following injector shut downs and start ups.

• Research Organization: Phillips Petroleum Co.
• OSTI ID: 6142594
• Report Number(s): CONF-8409104-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE13120
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ATLANTIC OCEAN
COMPUTERIZED SIMULATION
ENHANCED RECOVERY
EUROPE
FLUID INJECTION
GEOLOGIC DEPOSITS
MINERAL RESOURCES
NORTH SEA
NORWAY
OIL FIELDS
OIL WELLS
PERFORMANCE
PERMEABILITY
PETROLEUM DEPOSITS
POROSITY
RECOVERY
RESERVOIR ROCK
RESOURCES
SCANDINAVIA
SEAS
SIMULATION
SURFACE WATERS
WATERFLOODING
WELLS
WESTERN EUROPE