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OIL AND GAS RESOURCES, AUSTIN CHALK, US

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Product Details

Product Number
368008
Series
SIR-2012-5159
Scale
NO SCALE
Alternate ID
SIR-2012-5159
ISBN
978-1-4113-3549-3
Authors
CENTRAL ENERGY RES SCI CENTER
Version Date
01/01/2012
Regions
TX, TN, OK, MS, MO, LA, KY, IL, GA, FL, AR, AL
Countries
USA
Media
Electronic (Physical)
Format
CD-ROM

Additional Details

Description
Abstract

The Upper Cretaceous Austin Chalk forms a low-permeability, onshore Gulf of Mexico reservoir that produces oil and gas from major fractures oriented parallel to the underlying Lower Cretaceous shelf edge. Horizontal drilling links these fracture systems to create an interconnected network that drains the reservoir.

Field and well locations along the production trend are controlled by fracture networks. Highly fractured chalk is present along both regional and local fault zones. Fractures are also genetically linked to movement of the underlying Jurassic Louann Salt with tensile fractures forming downdip of salt-related structures creating the most effective reservoirs. Undiscovered accumulations should also be associated with structure-controlled fracture systems because much of the Austin that overlies the Lower Cretaceous shelf edge remains unexplored.

The Upper Cretaceous Eagle Ford Shale is the primary source rock for Austin Chalk hydrocarbons. This transgressive marine shale varies in thickness and lithology across the study area and contains both oil- and gas-prone kerogen. The Eagle Ford began generating oil and gas in the early Miocene, and vertical migration through fractures was sufficient to charge the Austin reservoirs.

Survey Date
2012
Print Date
2012
Height In Inches
5.000
Length In Inches
5.500
Two Sided
No
Pieces
1
Languages
English
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