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The purpose of the paper is to define the geologic features of a delta lobe in offshore Louisiana and relate them to seismic characteristics. The seismic facies found in the delta sequence were also studied and compared to the different subdivisions of the delta lobe and its respective geologic features.
The data consisted of a grid of eleven seismic lines which covered an area of 550 sq mi (1,430 sq km). Four wells with various geophysical logs, and paleontologic determinations of their environments, were also included in the data.
A synthetic seismogram and two models were developed: a depositional model, and a seismic facies model. The synthetic seismogram was made from Well C using a velocity log and a density log to obtain the reflection coefficients. These reflection coefficients were then filtered using a time-variant filter. The depositional model was constructed on the basis of the correlation and interpretation of SP logs, the paleoenvironments, and a dip log. The seismic facies model was developed by correlating the seismic reflection characteristics found in the synthetic seismogram with the seismic lines.
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