Integrated geologic/engineering study of the Kurten Field waterflood

Conference · Tue May 01 00:00:00 EDT 1990 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:6754474

Gay, A L ^[1]

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1. Chevron U.S.A. Inc., Houston, TX (USA)

An integrated interpretation of petrographic, geochemical, engineering, and electric-log data was used to evaluate a current waterflood project in Kurten field, Brazos County, Texas. Petrographic studies reveal three sand facies deposited in a dynamic sand ridge environment. Although electric-log porosity is relatively constant throughout the sand body, scanning electron microscope thin section and engineering profile studies reveal the clean well-sorted sand facies to be impermeable due to quartz overgrowths. A quartz-rich bioturbated sand is identified as the reservoir facies, having fewer quartz overgrowths and more authigenic clays. The third sand facies, a clay-rich bioturbated sand, is impermeable due to an overabundance of authigenic and detrital clays. Engineering and production data support this interpretation. A comparison of hydrocarbon composition of the oils, using capillary gas chromatography, supports the conclusion that the well-sorted clean sand contains many permeability barriers and is not a continuous reservoir conducive to waterflooding. Interactive computer interpretation of electric logs, using a combination of sonic and density porosities, deep resistivity, and spontaneous potential, allows the mapping of the sand facies. Water saturations and net oil in place maps reveal the best parts of the field on which to focus the revised waterflood project. This revision should concentrate on the quartz-rich bioturbated sand in the central part of the original unit to result in a more efficient economical secondary recovery program.

• OSTI ID: 6754474
• Report Number(s): CONF-900605-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (USA), Vol. 74:5; Conference: Annual convention and exposition of the American Association of Petroleum Geologists, San Francisco, CA (USA), 3-6 Jun 1990; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
58 GEOSCIENCES
OIL WELLS
WATERFLOODING
TEXAS
OIL FIELDS
ELECTRIC LOGGING
ENHANCED RECOVERY
GAS CHROMATOGRAPHY
GEOCHEMICAL SURVEYS
PERMEABILITY
PETROLEUM
PETROLOGY
POROSITY
RESERVOIR ENGINEERING
SANDSTONES
WATER SATURATION
CHROMATOGRAPHY
ENERGY SOURCES
ENGINEERING
FEDERAL REGION VI
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGY
MINERAL RESOURCES
NORTH AMERICA
PETROLEUM DEPOSITS
RECOVERY
RESOURCES
ROCKS
SATURATION
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SURVEYS
USA
WELL LOGGING
WELLS
020300* - Petroleum- Drilling & Production
580000 - Geosciences