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| Seismic sedimentology in the Olmos formation of upper Cretaceous, Gold River North Oilfield, Webb County, south Texas |
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LI Xiu-peng1,ZENG Hong-liu2,ZHA Ming1
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(1. College of Geo-Resources and Information in China University of Petroleum, Dongying 257061, China;2. Bureau of Economic Geology, the University of Texas at Austin, Austin, Texas 78758，USA)
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| Abstract: |
| By using 3D seismic and logging data, seismic sedimentology was studied in Olmos formation of upper Cretaceous, Gold River North Oilfield, Webb County, south Texas, and nine fourth order sequences were identified with the technique of 90°-phase data and stratal slices. The results show that seismic amplitudes can be correlated to log lilhologies by using 90°-phase seismic data and used to analyze Iithofacies. The technique of stratal slices can reveal the isochronism of sediment dispersal patterns with high-resolution. And the sedimentary systems can be analyzed with lithologic log data. A shelf-edge deltaic system including fluvial plain, deltaic plain，deltaic-front, prodelta, and incised valleys was identified in Olmos formation of Gold River North Oilfield. |
| Key words: seismic sedimentology sedimentary system della stratal slice Olmos formation |
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