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The Sedimentary Structure of a Coarse Grained Point Bar as Resolved by GPR, Congaree River Valley, SC

Patrick Duff
Department of Geology, University of South Carolina, Columbia, SC, USA
[email protected]


Flood plain deposition within incised alluvial valleys is widely recognized as complex, and floodplain deposits are characterized by abrupt lateral and vertical discontinuities in facies. The complex architecture of flood plain deposits represents a significant obstacle to correctly applying the Incised Valley Fill Model, one of the most utilized conceptual models in hydrocarbon exploration. As the major reservoir target in systems involving incised alluvial valleys, predicting the occurrence of point bar deposits in the subsurface, as well as understanding their internal structure and relationship to other flood plain deposits remains a topic of active research.

GPR lines will be acquired to investigate the internal structure of a coarse grained point bar deposit, as well as to serve as an experiment in the application of GPR to sedimentological and stratigraphic research. Strike and dip oriented GPR reflection lines, as well as a CMP survey will be collected in 50, 100, and 200 MHz on point bar number two, Conagree River Valley, South Carolina. The resulting data will be processed and interpreted using a radar stratigraphic approach. The results will shed light on the depositional character of the Congaree River Valley, establish the suitability of point bar two as a reservoir analogue, and suggest a broader role for GPR technology in sedimentological and stratigraphic investigations.

AAPG Search and Discovery Article #90199 © 2014 AAPG Foundation 2014 Grants-in-Aid Projects