Diagenesis of the Almond sandstone in the Washakie Basin

Conference · Wed Jan 01 04:00:00 EST 1992 · Geological Society of America, Abstracts with Programs; (United States)

OSTI ID:5806789

Yin, Peigui; Liu, Jie; Surdam, C R ^[1]

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1. Univ. of Wyoming, Laramie, WY (United States). Dept. of Geology and Geophysics

The marginal marine and nonmarine Almond sandstones are mostly sublitharenite, litharenite, and lithic arkose. The sandstones are fine-to very-fine-grained, and are well-sorted. The framework composition, authigenic minerals, and porosity and permeability distributions in the Almond sandstones are different below and above 8,000 feet, resulting in a variation in hydrocarbon reservoir types. The shallow conventional reservoirs are permeable, producing both liquid oil and gas, whereas the deep gas-bearing sandstones are very tight and overpressured. Porosity of the shallow Almond sandstones have been significantly enhanced by dissolution of the feldspar grains and lithic fragments. Quartz overgrowth cement and authigenic clay rims have occluded most of the intergranular pores, as well as the previously leached pores. The Almond sandstones have been buried deeper than their present depths. The sandstones in each part of the Washakie Basin have experienced different uplift and subsidence. Reconstruction of the burial history and diagenetic modeling are essential steps for understanding the diagenetic evolution of the Almond sandstones.

• OSTI ID: 5806789
• Report Number(s): CONF-921058--
• Conference Information: Journal Name: Geological Society of America, Abstracts with Programs; (United States) Journal Volume: 24:7
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000* -- Geosciences
DEVELOPED COUNTRIES
DIAGENESIS
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GROUND SUBSIDENCE
GROUND UPLIFT
MINERAL RESOURCES
MINERALOGY
NATURAL GAS DEPOSITS
NORTH AMERICA
PERMEABILITY
PETROLEUM DEPOSITS
POROSITY
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
USA
WASHAKIE BASIN
WYOMING