Gas reservoirs in Stuart City trend along lower Cretaceous shelf margin in south Texas
Conference
·
· SEPM Carbonate Reservoir Rocks Core Workshop; ()
OSTI ID:5287257
A complex of reefs, banks, tidal bars, channel fills, and stabilized grainflats accumulated along the Lower Cretaceous shelf margin in S. Texas. The wide range of energy levels along this shelf-margin complex resulted in deposition of numerous facies, some with initial porosities as great as 30 to 40%. Subsequent marine cementation, meteoric phreatic diagenesis, and deep subsurface cementation have generally filled pore spaces and blocked permeability within the limestone. Only 4 facies commonly have greater than 5% porosity and 5 md permeability--the algae encrusted miliolid-coral- caprinid packstone, mollusk grainstone, rudist grainstone, and coral-stromatoporoid boundstone. Stuart City gas fields are facies-controlled stratigraphic traps. Gas is present within common intraparticle and moldic porosities, which are best preserved in the 4 depositional facies listed above. Fractures provide the effective gas collecting network in the Stuart City reservoirs. 11 referernces.
- OSTI ID:
- 5287257
- Report Number(s):
- CONF-8006217-
- Conference Information:
- Journal Name: SEPM Carbonate Reservoir Rocks Core Workshop; () Journal Volume: 1
- Country of Publication:
- United States
- Language:
- English
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Sat Sep 01 00:00:00 EDT 1990
· AAPG Bulletin (American Association of Petroleum Geologists); (USA)
·
OSTI ID:5967674