Integrated seismic-petrologic mapping of ooid bars and associated facies, St. Louis Formation (Upper Mississippian), Gray County, Kansas

Conference · Tue Aug 01 00:00:00 EDT 1989 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:5661364

Single, R S ^[1]

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1. Univ. of Texas, Austin (USA)

Localized dim-spot anomalies on a large-amplitude, continuous seismic reflector correspond to porosity zones in the St. Louis Limestone. Anomalies are recognized as a decrease in wavelet amplitude on 12-fold CDP data and smaller amplitudes represent higher porosity. Mapped low-amplitude anomalies trend in a northwest-southeast direction. Continuously cored intervals from wells tied to the seismic data were studied to determine depositional environment, porosity types, and their relationships to the seismic anomalies. Porous ooid grainstones, up to 12 ft thick, encased in mud-rich skeletal wackestones and packstones document the presence of ooid shoals developed on a low-moderate energy shelf. The shoals, as seen on wireline logs and in cores, define a northwest-southeast-trending bar complex paralleling depositional strike. Primary interparticle and leach porosity totals around 10% in the ooid grainstone. Skeletal wackestones-packstones are locally cross-bedded and contain contorted shale laminations. These facies are tightly cemented and were deposited on a low-moderate energy shelf. Northwest-southeast-trending porosity zones in ooid grainstone shoals correlate with low-amplitude anomalies having the same orientation.

• OSTI ID: 5661364
• Report Number(s): CONF-8909166--
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (USA), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (USA) Vol. 73:8; ISSN AABUD; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
DEPOSITION
DIAGENESIS
DRILL CORES
FEDERAL REGION VII
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGY
GEOPHYSICAL SURVEYS
KANSAS
MINERAL RESOURCES
MISSISSIPPIAN PERIOD
NORTH AMERICA
PERMEABILITY
PETROLEUM DEPOSITS
PETROLOGY
POROSITY
RESERVOIR ROCK
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SEISMIC SURVEYS
SHALES
SURVEYS
USA