川东云安厂构造带三岔坪构造解析
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摘要
三岔坪构造位于川东高陡构造带,是我国油气勘探的主要战略区。从三岔坪构造的典型地震剖面分析入手,可建立合理的断层相关褶皱模型,利用平衡剖面进行复原,验证解释合理性。对比地震剖面显示三岔坪构造在东西两段的主断层挤压方向存在反向,东段云安厂构造和硐村构造主断层由南向北逆冲,西段巴阳构造主断层沿滑脱层由北向南滑脱。
As a major strategic reserve of oil and gas exploration in China,Sanchaping structure lies in the steep structural zones in Eastern Sichuan Basin.Starting with typical seismic profile analysis of Sanchaping structure,a reasonable fault-related fold model was established.Then,the use of balanced section for recovery was applied to test and verify its rationality.The comparison of seismic profiles reveals that the extrusion direction in east and west major fault shows opposite direction.Besides,the east of Yunanchang structure and Dongcun major fault thrust from the south toward the north.Meanwhile,along detachments,the west of Bayang structural fault shows detachment from the north to the south.
As a major strategic reserve of oil and gas exploration in China,Sanchaping structure lies in the steep structural zones in Eastern Sichuan Basin.Starting with typical seismic profile analysis of Sanchaping structure,a reasonable fault-related fold model was established.Then,the use of balanced section for recovery was applied to test and verify its rationality.The comparison of seismic profiles reveals that the extrusion direction in east and west major fault shows opposite direction.Besides,the east of Yunanchang structure and Dongcun major fault thrust from the south toward the north.Meanwhile,along detachments,the west of Bayang structural fault shows detachment from the north to the south.
引文
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[4]胡召齐,朱光,刘国生,等.川东“侏罗山式”褶皱带形成时代:不整合面的证据[J].地质论评,2009,55(1):32~42.
[5]Suppe J.Geometry and kinematics of faultbend folding[J].American Journal of Science,1983,283:684~721.
[6]Shaw J,Connors C,Suppe J.Seismic Interpretation of Contractional Fault Related Folds:An AAPG Seismic Atlas.Studies in Geology#53[M].Tulsa:the American Association of Petroleum Geologists,2005,11~25.
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[8]金之钧,龙胜祥,周雁,等.中国南方膏盐岩分布特征[J].石油与天然气地质,2006,27(5):571~583.