四川盆地川中地区震旦系灯影组台地边缘相带地震识别及其分段特征

doi:10.11743/ogg20170608

Abstract

Abstract: The Sinian Dengying Formation platform margin facies is developed in east and west of the Mianzhu-Changning Rift,Sichuan Basin,where oil and gas accumulated.Seismic recognition,fine characterization and distribution features of the platform facies zones are carried out by means of detailed interpretation of seismic facies and horizon flattening.Seismic reflection features of facies zones on the platform margin are "dome-shaped" or brackish-shaped,with internal messy or earthworm-like reflections,moderate to weak amplitudes,and low to intermediate frequencies.Three stages of platform margin zones,Z₂dn¹,Z₂dn² and Z₂dn⁴,developed in east and west of the Mianzhu-Changning Rift,and two stages of platform margin zones developed in Z₂dn².The Z₂dn¹ platform margin zone is distributed in eastern area of the Anyue-Lezhi,trending in near North-South direction.The Z₂dn² platform margin zone is distributed in a semi-circle shape.The Z₂dn⁴ platform margin zone trends in near north-south direction to the south of the Anyue,and in northeast-southwest direction in the Suining-Shehong area.The distribution pattern of the platform margin facies of the Sinian Dengying Formation in the central Sichuan Basin indicates that the Sinian Dengying Formation has favorable exploration zones.This characterization work gives some guidance for further oil and gas exploration.

Key words: horizon flattening, seismic facies, platform margin facies zone, isolated platform, Dengying Formation, Sichuan Basin

CLC Number:

TE121.3

Zeng Fuying, Yang Wei, Sun Ai, Jin Hui, Xie Wuren, Ma Shiyu, Su Nan. Seismic recognition and zonation of the platform margin facies of the Sinian Dengying Formation in central Sichuan Basin[J]. Oil & Gas Geology, 2017, 38(6): 1079-1086.

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Seismic recognition and zonation of the platform margin facies of the Sinian Dengying Formation in central Sichuan Basin

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