Hypothesis combining dilation, natural hydraulic fracturing, and dolomitization to explain petroleum reservoirs in Monterey shale, Santa Maria area, California

Conference · Fri May 01 00:00:00 EDT 1981 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:5810905

Redwine, L

Fractured reservoirs in the generally siliceous Monterey shale of the Santa Maria area represent an anomalous lithology and type of fracturing. Some, perhaps all, are not fractured chert but parts of the Monterey embrittled by dolomitization. Reservoir fractures, unlike ubiquitous Monterey fractures, are mostly abundant, disordered, open extension fractures that commonly produce epigenetic, dolomitic breccias. These dolomite-cemented breccias commonly contain open voids, many of which are 15 cm across or larger. Breccias locally have an exploded appearance and contain some matched fragments separated by vein-like or dike-like matrix, which apparently was an injected slurry of water and oil containing fragments of dolomite and dolomitic Monterey shale.

• OSTI ID: 5810905
• Report Number(s): CONF-8105250-
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 65:5; Conference: Annual AAPG-SEPM-EMD-DPA convention, San Francisco, CA, USA, 31 May 1981
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CALIFORNIA
PETROLEUM DEPOSITS
GEOLOGIC FRACTURES
DOLOMITE
FRACTURED RESERVOIRS
GEOLOGY
LITHOLOGY
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
FEDERAL REGION IX
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
RESOURCES
USA
020200* - Petroleum- Reserves
Geology
& Exploration