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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: AL, AR, FL, GA, IL, KY, LA, MO, MS, OK, TN, TX
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
Height In Inches: 5.000
Two Sided: No
Pieces: 1
Languages: English
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