Interactions between early and late diagenesis in reservoir formation, Lisburne field, Prudhoe Bay, Alaska

Conference · Wed Mar 01 04:00:00 EST 1989 · AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)

OSTI ID:5954331

Jameson, J

The Lisburne field is an example of a giant carbonate oil field where reservoir porosity formed due to several distinct, diagenetic events. The later stages of diagenesis occurred during relatively deep burial and often exploited preexisting pathways. Although burial diagenesis is generally perceived as being destructive to porosity and permeability, the Lisburne field is an example where late processes combine to enhance reservoir properties. The earliest porosity formed during the Pennsylvanian as shallow-marine carbonates of the Wahoo formation, which were subaerially exposed at the close of some depositional cycles. Early porosities are moldic and minor intercrystalline, occurring at shoal and near shoal facies. The second stage of porosity development is intercrystalline, associated with Permian-Triassic burial and ferroan dolomitization at depths of 1000-2000 ft (800-1600 m). Trace element gradients and isotopic data indicate the overlying Kavik shales were a source of fluids. In general, ferroan dolomites formed by overgrowth on early (.Pennsylvanian) dolomite. The youngest porosity is moldic and Cretaceous/Tertiary age. Burial fabrics such as stylolites and sutured grain contacts are often probably associated with burial expulsion of fluids from Cretaceous shales on the eastern side of the field. Although each stage of porosity is volumetrically significant, the reservoir quality of the Lisburne field is best in areas affected by all three stages of diagenesis. The second and third stages of porosity development are particularly important to reservoir quality.

• Research Organization: Exxon Co., Houston, TX (USA)
• OSTI ID: 5954331
• Report Number(s): CONF-890404-
• Conference Information: Journal Name: AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States) Journal Volume: 73:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ARCTIC OCEAN
BAYS
BEAUFORT SEA
CARBONATE ROCKS
CENOZOIC ERA
CRETACEOUS PERIOD
DIAGENESIS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
MESOZOIC ERA
MINERAL RESOURCES
OIL FIELDS
PALEOZOIC ERA
PENNSYLVANIAN PERIOD
PERMIAN PERIOD
PETROLEUM DEPOSITS
POROSITY
PRUDHOE BAY
RESERVOIR ROCK
RESOURCES
ROCKS
SEAS
SEDIMENTARY ROCKS
SHALES
SURFACE WATERS
TERTIARY PERIOD
TRIASSIC PERIOD