Technology and Application of Structural-Lithologic Trap Identification and Reservoir Characterization of Paleogene Steep Slope Fans

doi:10.3969/j.issn.1006-6535.2020.05.006

Abstract

Abstract: Due to the lack of bright spot seismic reflection characteristics, it is difficult to identify traps and characterize reservoirs in the process of target evaluation for steep slope fans developed in oil generation sags. Taking LF 1-X target of Paleogene steep slope fan in the Lufeng sag of the Pearl River Mouth Basin as an example, by using various geophysical interpretation techniques such as paleogeomorphological analysis technology, three-dimensional visualization technology and prestack elastic inversion reservoir prediction technology, the technologies for identifying structure-lithologic target traps and characterizing reservoirs in Paleogene steep slope fans in the oil generation sags have been developed, which have effectively identified and characterized the trap and reservoir distribution of this sedimentary type. The research results show that fan delta reservoirs are well developed in the fifth Member of the Wenchang Formation (Wen 5 Member for short) in LF 1-X structure; the enrichment degree of lobes in the west side of the Wen 5 Member reservoir is higher than that of the east side; fan delta front is a favorable development site for high-quality reservoirs. The research results can be referred for the comprehensive evaluation of structural-lithologic targets in steep slope fans of oil generation sags.

Key words: Lufeng sag, Paleogene, steep slope fan, structural-lithologic trap, trap implementation, reservoir characterization

CLC Number:

TE122.3

Yang Dongsheng, Zhao Zhigang, Xu Jianyong, Liu Zhifeng, Li Nan. Technology and Application of Structural-Lithologic Trap Identification and Reservoir Characterization of Paleogene Steep Slope Fans[J]. Special Oil & Gas Reservoirs, 2020, 27(5): 38-44.

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