Abstract
Sequence stratigraphic interpretation was carried out by integrating biostratigr aphic analysis, well log, and seismic interpretations in the offshore Louisiana of the Gulf of Mexico.In biostratigraphic analysis, abundance of benthonic foraminifera, planktonic foraminifera and calcareous nannoplankton were investigated in the depth range from 2, 500ft to 6, 500ft of a well located in the south addition of South Marsh Islands area. Four 4th order sequences were identified through recognizing condensed sections characterized by peaks of abundance curves.In well log interpretation, high gamma-ray and low resistivity were the indicators of condensed sections. Upward coarsening and upward fining patterns were interpreted to identify sequences and systems tracts.In seismic interpretation, reflection character was used to identify sequences and systems tracts because reflection terminations such as onlaps, offlaps, downlaps were not obvious in this area. Condensed sections were characterized by continuous high amplitude reflectors. Slope fan systems tracts were characterized by hummocky reflection configurations.By integrating biostratigraphic analysis, well log, and seismic interpretations, sequence and systems tracts can be identified with great precision and confidence. This can be achieved by none of three techniques by itself.
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