石油实验地质2018，Vol.40Issue(2)：177-184,8.DOI:10.11781/sysydz201802177
鄂西仙女山断裂构造演化及其对长阳背斜圈闭性的影响
Tectonic evolution of Xiannüshan fault and its influence on hydrocarbon traps in Changyang anticline, Western Hubei fold belt
摘要
Abstract
The Western Hubei fold belt is an important oil and gas exploration area in South China. Located in the northeast of the fold belt, the Xiannüshan fault intersects the Changyang anticline, and has an important influence on the hydrocarbon traps in the Changyang anticline.However,the geometrical morphology and evolution history of the Xiannüshan fault has not been well studied due to the lack of accurate depth information, and the influence on hydrocarbon trap evolution was still unclear.Based on the interpretation of the latest seismic section in the central part of the fault,the quasi-three-dimensional shape and the formation process of the Xiannüshan fault were analyzed. Combined with the regional geological evolution and hydrocarbon accumulation process, the influ-ence of the formation and evolution of faults on the preservation units in the Changyang anticline was analyzed. (1)The Xiannüshan fault belt can be divided into three parts. The northern part is dipping westwards, while the middle and southern parts are dipping eastwards.(2)The Xiannüshan fault was first formed during the Late Jurassic as a strike slip fault,pulling apart during the Late Cretaceous,and thrusted during the Middle and Late Paleogene. (3)The strike slip of the Xiannüshan fault in the Late Jurassic was favorable for hydrocarbon migration in the Changyang anticline. However, the stretching of the Xiannüshan fault in the Late Cretaceous destroyed tectonic traps in the Changyang anticline, leading to hydrocarbon loss. In areas where similar faults have occurred in the western Hubei,the potential for oil and gas exploration may have been adversely affected.关键词
地震剖面/油气藏圈闭/仙女山断裂/湘鄂西褶皱带/中扬子地区Key words
seismic profile/hydrocarbon trap/Xiannüshan fault/Western Hubei fold belt/Middle Yangtze region分类
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邓铭哲,何登发,张煜颖..鄂西仙女山断裂构造演化及其对长阳背斜圈闭性的影响[J].石油实验地质,2018,40(2):177-184,8.基金项目
国家重点基础研究发展计划(973计划)项目(2017YFC0601405)资助. （973计划）
