琼东南盆地宝岛凹陷北坡断裂体系新认识及与天然气成藏关系
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摘要
琼东南盆地宝岛凹陷北坡存在近SN向走滑断裂,改变了前人对琼东南盆地断裂体系的认知。通过切取三维地震相干体的时间切片,落实了走滑断裂的实际走滑距离;利用断裂生长指数推断出走滑断裂的构造应力方向及走滑断裂的活动期次,并通过分析走滑断裂对烃源、储层物性、油气运聚、成藏等影响作用,认为琼东南盆地宝岛凹陷北坡将是未来有利的勘探区域。
The S-N directional strike-slip faults,which are integrated at the northern slope of the Baodao sag in Qiongdongnan basin,change the previous recognition about the basin′s fault system.We use the 3D time slice of seismic coherence body to measure the real distance of the strike-slip fault.Depended on fault activity index,we determine the structural stress direction and deduce the activity stages of the strike-slip fault.Based on taking the effect of the strike-slip fault on source kitchen,reservoir property,gas migration and accumulation,we consider that the northern slope of the Baodao sag would be a potential province for future petroleum exploration.
The S-N directional strike-slip faults,which are integrated at the northern slope of the Baodao sag in Qiongdongnan basin,change the previous recognition about the basin′s fault system.We use the 3D time slice of seismic coherence body to measure the real distance of the strike-slip fault.Depended on fault activity index,we determine the structural stress direction and deduce the activity stages of the strike-slip fault.Based on taking the effect of the strike-slip fault on source kitchen,reservoir property,gas migration and accumulation,we consider that the northern slope of the Baodao sag would be a potential province for future petroleum exploration.
引文
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[3]Li Xuxuan,Zhu Guanghui.The fault system and its hydrocar-bon carrier significance in Qiongdongnan basin[J].China Off-shore Oil and Gas,2005,17(1):1-7.[李绪宣,朱光辉.琼东南盆地断裂系统及其油气输导特征[J].中国海上油气,2005,17(1):1-7.]
[4]Yang Hongjun.Hydrocarbon carrier system types and accumula-tion models in Qiongdongnan basin[J].China Offshore Oil andGas,2008,20(2):87-91.[杨红军.琼东南盆地油气输导体系类型及运聚成藏模式[J].中国海上油气,2008,20(2):87-91.]
[5]Xia Yiping,Liu Wanhui,Xu Ligui,et al.Identification ofstrike-slip fault and its petroleum geology significance[J],China Petroleum Exploration,2007,(1):17-23.[夏义平,刘万辉,徐礼贵,等.走滑断层的识别标志及其石油地质意义[J].中国石油勘探,2007,(1):17-23.]
[6]Zolnai G.Continental Wrench-tectonics and Hydrocarbon Ha-bitat[M].2nd Edition.Oklahoma:American Association ofPetroleum Geologists Education Department,1991.
[7]Qi Jiafu,Xia Yiping,Yang Qiao.Petroleum Structure Analy-sis[M].Beijing:Petroleum Industry Press,2006:108-109.[漆家福,夏义平,杨桥.油区构造解析[M].北京:石油工业出版社,2006:108-109.]
[8]Yang Kesheng.China Petroleum Basin Structure and TectonicStyle Seismic Interpretation[M].Beijing:Petroleum IndustryPress,2006:186-196.[杨克绳.中国含油气盆地结构和构造样式地震解释[M].北京:石油工业出版社,2006:186-196.]
[9]Huang Baojia.Gas potential and its favorable exploration are-as in Qingdongnan basin[J].Natural Gas Industry,1999,19(1):34-39.[黄保家,琼东南盆地天然气潜力及有利勘探方向[J].天然气工业,1999,19(1):34-39.]
[10]Liu Yurui,Liu Qidong,Yang Xiaolan.Relation between fea-tures of strike-slip faults and hydrocarbon accumulation in Su-bei basin[J].Oil&Gas Geology,2004,25(3):279-283.[刘玉瑞,刘启东,杨小兰.苏北盆地走滑断层特征与油气聚集关系[J].石油与天然气地质,2004,25(3):279-283.]
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