Rock-eval data relating to oil-source potential of shales of New Albany group (Devonian-Mississippian) in Illinois basin

Conference · Mon Aug 01 04:00:00 EDT 1988 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:5589037

Chou, Mei-In M; Dickerson, D R; Sargent, M L ^[1]

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1. Illinois State Geological Survey, Champaign (USA)

Only limited data on petroleum source rock potential of New Albany Group (Devonian-Mississippian) shales have been reported, with the exception of vitrinite reflectance and some petrographic analyses. The New Albany Group contains the thickest and most widespread continuous black shale beds in the Illinois basin. The New Albany extends from northwestern Illinois to southwestern Indiana and western Kentucky and is thought to have played a major role in petroleum generation throughout the basin. In this study, Rock-Eval pyrolysis was used to measure the petroleum-generative potential and production index of the shale. Seven geochemical logs, based on 143 core samples from across the basin, and a production index map, based on a total of 252 samples (cuttings and cores) in Illinois, were generated. Systematic variations of petroleum-generative potential of the shale were observed. The variations are related to the differences in shale lithofacies, depth, and geographic location. The upper portion of the New Albany - the Hannibal and Saverton Shales - has the lowest oil-generative potential. The Grassy Creek, Sweetland Creek, and other stratigraphically lower shales of the New Albany Group generally have good oil-generative potential. However, samples from the Hicks dome area of extreme southern Illinois are overmature and have no oil-generative potential. Source rocks that have both good oil-generative potential (> 6 kg hydrocarbons per ton of rock) and a higher production index (> 0.09) are generally located at depths of 2,500-5,300 ft.

• OSTI ID: 5589037
• Report Number(s): CONF-8809345--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (USA) Journal Volume: 72:8
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
BITUMINOUS MATERIALS
BLACK SHALES
CARBONACEOUS MATERIALS
CHATTANOOGA FORMATION
DEVONIAN PERIOD
ENERGY SOURCES
FEDERAL REGION V
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC STRUCTURES
ILLINOIS
MATERIALS
MATURATION
MINERAL RESOURCES
MISSISSIPPIAN PERIOD
NORTH AMERICA
OIL SHALES
PALEOZOIC ERA
PETROLEUM DEPOSITS
RESOURCES
SEDIMENTARY BASINS
SOURCE ROCKS
USA