北部湾盆地涠西勘查区反转构造及其油气成藏意义
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摘要
在系统分析北部湾盆地涠西勘查区地震剖面的基础上,认为北部湾盆地涠西勘查区发育两期反转构造即渐新世末期及中新世末期反转构造。这两期反转构造形成断层型反转构造和褶皱型反转构造两类,它们的形成与北部湾盆地演化的区域应力性质及方向的调整有关。该反转构造一方面形成良好的圈闭条件,另一方面使早期形成的断裂重新活动,有利于油气运移。同时两期反转构造形成的圈闭与勘查区内主要的烃源岩生排烃高峰具有良好的时空配置关系,有利于油气聚集成藏,是寻找大中型油气田的首选目标。
It was indicated that there were two different inversion structures formed in two period based on analysis of seismic profiles in Weixi exploration region of the Beibuwan Basin.The first inversion structure was developed during the end of the Oligocene and the second during the end of the Miocene.These two periods of inversion structures can be divided into two types which were fault type and fold type.Formation of these inversion structures was resulted from the directional and qualitative adjustment of regional stress.On the one hand these inversion structures formed favourable traps,and on the other hand these inversion structures caused the early faults reactivation and made for oil migration.In addition,the formation periods of these inversion structures were matchable with the peak stages of hydrocarbon generation and expulsion.These inversion structures are preferred targets for finding giant-medium size of oil-gas fields.
It was indicated that there were two different inversion structures formed in two period based on analysis of seismic profiles in Weixi exploration region of the Beibuwan Basin.The first inversion structure was developed during the end of the Oligocene and the second during the end of the Miocene.These two periods of inversion structures can be divided into two types which were fault type and fold type.Formation of these inversion structures was resulted from the directional and qualitative adjustment of regional stress.On the one hand these inversion structures formed favourable traps,and on the other hand these inversion structures caused the early faults reactivation and made for oil migration.In addition,the formation periods of these inversion structures were matchable with the peak stages of hydrocarbon generation and expulsion.These inversion structures are preferred targets for finding giant-medium size of oil-gas fields.
引文
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20梁积伟,解东宁,何明喜等.华北盆地南部构造样式分析[J].石油实验地质,2006,28(5):414~417
21吴根耀,马力.“盆”“山”耦合和脱耦的反转点和切入点研究[J].石油实验地质,2005,27(1):8~17
2王燮培,严俊君.反转构造及其石油地质意义[J].地球科学,1989,14(1):101~108
3陈昭年,陈发景.反转构造与油气圈闭[J].地学前缘,1995,2(3):96~103
4翟光明.中国石油地质志卷十六沿海大陆架及毗邻海域油气区(下册)[M].北京:石油工业出版社,1992.353
5翟光明.中国石油地质志卷十六沿海大陆架及毗邻海域油气区(下册)[M].北京:石油工业出版社,1992.185
6宋廷光,余百莲,韩典杰等.反转构造的类型和特点[J].地球科学,1995,20(3):271~274
7陈昭年,陈发景.松辽盆地反转构造[M].北京:地质出版社,1996.1~63
8 Ting Guang Song.Inversion styles in the Songliao basin(Northeast China)and estimation of the degree of inversion[J].Tectonophysics,1997,283;173~188
9刘月新,常波涛,孙连浦等.反转构造的反转程度及其与油气聚集的关系[J].油气地质与采收率,2006,13(2):53~55
10邱中建,龚再升.中国油气勘探(第二卷):西部油气区[M].北京:石油工业出版社,1999.451~480
11朱文斌,马瑞士,郭令智等.吐哈盆地中央构造带正反转演化特征[J].大地构造与成矿学,2003,27(2):125~131
12罗权生.台北凹陷反转构造特征与油气关系浅析[J].石油勘探与开发,1997,24(5):25~28
13刘光炎.吐哈盆地HYS反转构造及其平衡演化[J].石油地球物理勘探,1998,33(3):413~417
14 Allen M B,Macdonald D I M,Zhao Xun,et al.Early Cenozoictwoa-phase extension and late Cenozoic thermal subsidenceand inversion of the Bohai Basin,northern China[J].Marineand Petroleum Geology,1997,14(7/8):951~972
15王国纯.中国近海盆地的正反转构造及其石油地质意义[J].中国海上油气(地质),1995,9(1):33~40
16张功成,朱德丰.松辽盆地伸展和反转构造样式[J].石油勘探与开发,1996,23(2):16~20
17陈昭年,陈发景.松辽盆地反转构造运动学特征[J].现代地质,1996,10(3):290~396
18罗笃清,云金表,李玉喜.松辽盆地的正构造反转及其形成机制探讨[J].大庆石油学院学报,1994,18(2):17~21
19翟光明.中国石油地质志卷十六沿海大陆架及毗邻海域油气区(下册)[M].北京:石油工业出版社,1992.187
20梁积伟,解东宁,何明喜等.华北盆地南部构造样式分析[J].石油实验地质,2006,28(5):414~417
21吴根耀,马力.“盆”“山”耦合和脱耦的反转点和切入点研究[J].石油实验地质,2005,27(1):8~17