摘要
利用三维地震、钻井和岩心薄片等资料,研究渤海湾沙北地区共轭走滑断裂的平面、剖面特征,分析走滑断裂对沉积体系、圈闭发育及油气运聚的控制作用。结果表明:共轭走滑断裂具有明显分期及分段特征,古近纪强伸展弱走滑,新近纪走滑加强;派生断裂与主走滑断裂搭接,形成平面呈马尾状、剖面呈花状的构造样式;主走滑断裂与边界断裂交汇形成断槽,是物源水系进入湖盆的主要通道,砂体沿走滑断裂走向富集。走滑断裂控制形成众多断块及断鼻圈闭,走滑应力决定圈闭规模及油气运聚。增压型构造圈闭面积大,侧封性好,有利于油气保存,是沙北地区下一步勘探有利目标。
The 3 Dseismic,drilling data,core and thin section are used to analyse the plane and section features of conjugate strike-slip fault in Shabei area of Bohai Bay,and its control on sedimentary system,trap development and hydrocarbon migration and accumulation.The results show that the conjugate strike-slip fault has obvious staging and segmental characteristics.Strong extending and weakly slipping occurred during the Paleogene,while strike slip strengthens in the Neogene.The derived faults and main faults occur vertically as flower structures and laterally as horse tail faults.The intersection of main strike-slip fault and boundary fault forms fault trough,which is the main channel for the sourcewater system to enter the lake basin,and the sand body is enriched along the strike-slip fault strike.The strike-slip fault control forms a large number of fault-block and fault-nose traps.The strike-slip stress determines the scale of traps and the migration and accumulation of hydrocarbons.The turbocharged structural trap with large area and good lateral sealing is conducive to the preservation of hydrocarbons,it can be the favorable exploration target for the next step.
出处
《东北石油大学学报》
CAS
北大核心
2018年第2期43-50,共8页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2016ZX05024-003)
关键词
共轭走滑断裂带
郯庐断裂
控制作用
沙北地区
渤海湾
conjugate strike-slip fault zone
Tan-Lu fault
control action
Shabei area
Bohai Bay
