Upper Permian (Guadalupian) coastal tidal flat and shelf lagoon deposits: outcrop model and subsurface examples of stratigraphic traps, Permian basin

Conference · Thu May 01 04:00:00 EDT 1986 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:5065536

Harris, P M; Ward, R F

Over half a century of exploration and development drilling has shown that hydrocarbons reservoired in Upper Permian (Guadalupian) deposits of west Texas and southeastern New Mexico have accumulated at the contact between shelf-lagoon dolomites or siltstones and their updip coastal evaporite equivalents. Production from any of the Guadalupian shelf units similarly occurs from stacked reservoirs of dolomites or siltstones. Dolomites comprise shoaling cycles of deposition: intercrystalline and moldic porosities typify basal dolomudstones and dolowackestones as well as overlying dolopackstones, whereas capping dolomudstones may contain fenestral porosity but usually are tight and interlayered with anhydrite. Interparticle porosity occurs in siltstones that are interbedded with the dolomites. Reservoir development is more a problem of updip seal than porosity, as sediments other than lagoonal dolomites and siltstones are porous. Porous carbonate sands accumulated in a backreef position and the shelf margin reef and associated slope debris apron have developed porosity secondarily through solution, fracturing, and minor dolomitization. Hydrocarbons migrated from presumed basinal source rocks through the margin and backreef, and continued updip into shelf lagoon deposits that pinch out into tight anhydrite-cemented equivalents as well as interbedded evaporites of coastal tidal-flat origin.

• Research Organization: Chevron Oil Field Research Co., La Habra, CA
• OSTI ID: 5065536
• Report Number(s): CONF-860624-
• Conference Information: Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 70:5
• 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
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
DOLOMITE
FEDERAL REGION VI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC TRAPS
GEOLOGY
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NATURAL GAS DEPOSITS
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
PERMIAN BASIN
PERMIAN PERIOD
PETROLEUM DEPOSITS
POROSITY
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SILTSTONES
STRATIGRAPHY
TEXAS
USA