江汉盆地西南缘主干断层活动性分析
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摘要
江陵凹陷的形成与发育过程非常复杂,经历了多期构造运动。文中分析了江汉盆地西南缘的构造背景及断裂发育特征,复兴场、谢凤桥等主干断裂是该区构造的主要控制因素,通过选取5条垂直于断层的剖面进行三维地震解释,认为它们具有同生断层的特点。讨论了生长指数研究断层活动性的局限性,用生长指数和断层活动速率,从空间和时间上,对该区主干断层的活动性进行了研究,结果表明断层活动速率更能反映出断层活动性。
Jangling depression,whose formation and development are very complicated,underwent multistage tectonization.By analyzing structure background and the development characteristics of the southwest of Jianghan basin and by choosing five section planes,which are vertical with these faults,for 3D seismic interpretation,it can be found that such main faults as Fuxingchang fault and Xiefengqiao fault control the regional structure and they are synsedimentary faults.The dimensional and temporal development characteristics of the main faults are studied both through growth index and fault activity ratio.It is indicated that the fault growth index cannot precisely reflect the actual fault activity.It has been proved that the fault activity ratio is fit for better analysis and study of the formation and development of the faults.
Jangling depression,whose formation and development are very complicated,underwent multistage tectonization.By analyzing structure background and the development characteristics of the southwest of Jianghan basin and by choosing five section planes,which are vertical with these faults,for 3D seismic interpretation,it can be found that such main faults as Fuxingchang fault and Xiefengqiao fault control the regional structure and they are synsedimentary faults.The dimensional and temporal development characteristics of the main faults are studied both through growth index and fault activity ratio.It is indicated that the fault growth index cannot precisely reflect the actual fault activity.It has been proved that the fault activity ratio is fit for better analysis and study of the formation and development of the faults.
引文
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[2]鲁兵,罗笃清,王凯.滨北地区浅层断裂特征、形成机制及其对圈闭的控制作用[J].1998,22(3):5-8.
[3]赵勇,戴俊生.应用落差分析研究生长断层[J].石油勘探与开发,2003,30(3):13-15.23(6):1-5.
[4]李阳.复杂断块油藏构造表征[M].北京:石油工业出版社,2001.
[5]李春光.中国东部盆地油气藏同生断层的定量研究[J].油气地质与采收率,2003,10(4):1-4.
[6]李勤英,罗凤芝,苗翠芝.断层活动速率研究方法及应用探讨[J].断块油气田,2000,7(2):15-17.
[7]吴智平,李伟,郑德顺.沾化凹陷中、新生代断裂发育及其形成机制分析[J].高校地质学报,2004,10(3):405-416.
[8]赵密福,刘泽容,信荃麟,等.惠民凹陷临南地区断层活动特征及控油作用[J].石油勘探与开发,2000,27(6):9-11.
[9]汤良杰,金之钧.负反转断裂主反转期和反转强度分析[J].石油大学学报(自然科学版),1999,23(6):1-5.
[10]肖英玉,郝雪峰.断层生长指数在层序地层单元中应用的局限性[J].油气地质与采收率,2003,10(增刊1):1-5.
[11]朱志澄.构造地质学[M].武汉:中国地质大学出版社,1999.
[12]衣学磊,侯贵廷.济阳坳陷中、新生代断裂活动强度研究[J].北京大学学报(自然科学版),2002,38(4):504-509.
[13]史兰斌,李祖信,唐汉军.新疆特克斯河下游河段断层活动性研究[J].工程地质学报,1994,2(3):13-19.
[14]陈孔全.江陵凹陷西南缘新生古储型油气成藏条件[J].天然气工业,2004,24(2):33-36.
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