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The AAPG/Datapages Combined Publications Database
GCAGS Transactions
Abstract
Hydrocarbon Production and Surface Expression of the China Segment of the Tepetate
Fault
Zone, Louisiana
ABSTRACT
The China Segment is a portion of the Tepetate Fault
Zone that traverses St. Landry, Acadia, and Jefferson Davis parishes. It is part of the larger Baton Rouge-Tepetate
Fault
System that is a major down-to-the-basin growth
fault
zone that traverses the northern portion of south Louisiana. This
fault
system exhibits syndepositional growth in the late Eocene and Oligocene periods with surface
fault
-line scarps and floodplain deformation indicating movement during Pleistocene and Holocene. The Baton Rouge
Fault
Zone comprises the eastern and central portion of the
fault
system, the Tepetate
Fault
Zone comprises the western portion and presents a more complex, sinuous, and segmented trace in the subsurface.
The China Segment exhibits surface expression consisting of a series of scarps that comprise the China fault
-line scarp. The
fault
-line scarps exhibit displacement ranging from 1.5 to over 3 meters. These scarps offset the surface of the Prairie Alloformation and associated abandoned river channels indicating reactivation and movement during the Pleistocene. Deformation of flood plains, where crossed by the trace of Tepetate
Fault
Zone, demonstrates Holocene
fault
movement.
Eight named hydrocarbon producing fields associated with the China Segment have cumulative production of 106 MMBO + 410 BCFG. Producing structures are predominately fault
generated rollover anticlines. The China Segment is also recognized as a barrier to freshwater flow in regional freshwater aquifers. The affect of
fault
reactivation on hydrocarbon entrapment and freshwater resources is uncertain.
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