摘要
基于三维地震资料解释和构造几何学,研究南堡凹陷3号构造中—深层两期断裂的油藏的控制作用。结果表明:南堡凹陷3号构造中—深层具有构造体系转换界面和构造反转界面,沙河街组顶部是构造体系转换的关键界面,早期以北东向伸展为主,晚期以南北向伸展兼右旋走滑为主;南堡凹陷3号构造主断层具有长期发育、旋回式活动特征,东西向断层具有活动时间晚、强度稳定特征,存在3类区域构造样式和12类局部构造样式;沙河街组一期断裂影响程度较小,造成深部断层具有较好的断层封闭性,而东营组二期断裂向下断入沙河街组一段内且与砂体连通,在伸展期极易开启并造成油气沿着浅部断层向上运移,深部油气聚集成藏非常有利,也为油藏聚集的有利场所。
Based on three-dimensional seismic data and structural geometry,research shows that the structural system transformation and structural inversion interface at the same time on mid-depth reservoir formation in the No.3Nanpu sag.Top of shahejie formation is the key to the structural system conversion interface.North-east to stretch in the early,and north-south to stretch and dextral strike-slip in the late.The main fault has a long-term development and cycle type activities,the east-west fault activity time late and stable strength,and derived fault activity time is short in the No.3 Nanpu sag,and there are 3categories of regional tectonic style and 12 categories of local tectonic style.The first phase of Shahejie formation fracture influence is small,cause deep fault has good fault sealing,second phase of Dongying formation fracture broken down into Sha 1,and connecting with sand body.Easily open up the shallow fault caused by oil and gas migration in the extension period,lead to deep upward migration and accumulation of oil and gas accumulation is very favorable.Speculation in Dongying formation also gathered the favorable places for reservoir.
出处
《东北石油大学学报》
CAS
北大核心
2016年第1期72-79,5,共8页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2011ZX05006-06)
中石油股份公司科技重大专项(2014E-050211)
关键词
构造转换
两期断裂
中—深层
3号构造
南堡凹陷
structural change
two phase fault
mid-depth reservoir
structure No.3
Nanpu sag
