Seismic sedimentology and its application in shallow sea area, gentle slope belt of Chengning uplift

Abstract

Seismic sedimentology is a new frontier inter-discipline subject, and shows good prospect and potentiality in reservoir deposition research with seismic data and geophysics technologies. We made seismic sedimentology research of shallow sea area, gentle slope belt of Chengning (埕宁) uplift, Bohaiwan (渤海湾) basin. In shallow sea area with sparse well coverage, it was difficult to characterize the reservoir architecture with the traditional method based on wells. A new method to resolve the above problems is built: (1) information on plane and in section is inter-calibrated with each other; (2) recognize the isochronic surfaces by frequency decomposition and interpret the depositional character with technology of stratal slicing; (3) make a comprehensive research with the stratal slice interpretation and the dissection of well group. The depositional model of this area is built and used in the architecture analysis of area without wells. The architecture description reveals that the sedimentary character of pan-connection sand bodies in braided rivers is the reason for high water cut of the new horizontal wells.

Keywords

seismic sedimentology / shallow sea area / gentle slope belt of Chengning uplift / braided river / architecture / braided bar

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