摘要
通过采用先进的地质解释软件,对柴北缘冷湖地区的三维地震资料进行解释,建立起该区域新生代的三维构造模型。研究区新生代构造主要是由断层F2活动引起的断层相关背斜,发育3条主要断层F2、F5和F6,均具有右行走滑冲断的性质。结合区域地质资料及断层F2的几何学和运动学特征,认为该断层和它的相关背斜为油气的二次运移和聚集提供了较好的通道和构造圈闭。
Through the interpretation of three-dimensional seismic profiles and by the use of the advanced geologic software, the Cenozoic underground three-dimensional structural model of Lenghu area on the northern margin of the Qaidam Basin is established. By observing and analyzing the three-dimensional structural model it can be discovered that the Cenozoic structure in the Lenghu area is a fault-related anticline resulted from fault F2. Three major faults, i.e. , F2 , F5 and F6, occur in the Cenozoic in the Lenghu area, and the faults in T2＇ surface dextrally cut across the contour, which reflects that the faults are of the dextral strike-slip thrust type and were resulted from a wrenching stress field. The dextral strike-slip thrust faults in the Lenghu area are closely related to the Ahun Tagh structural belt, which is a sinistral strike-slip thrust belt developed in the Cenozoic. Via analysis of the regional geologic data and the geometry and kinematics of fault F2, it can be concluded that the fault provide excellent channels and structural traps for hydrocarbon migration and accumulation.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2006年第4期430-434,共5页
Geotectonica et Metallogenia
基金
中国石油天然气股份公司横向课题资助.
关键词
柴北缘
冷湖地区
三维构造建模
断层相关背斜
右行走滑冲断
northern margin of Qaidam Basin
Lenghu area
three-dimensional structure anticline
dextral strike-slip thrust F2 and its related fold modeling
fault-related
