柴北缘冷湖地区构造建模和构造分析  

THREE-DIMENSIONAL STRUCTURE MODELING AND STRUCTURAL ANALYSIS OF THE LENGHU AREA ON THE NORTHERN MARGIN OF QAIDAM BASIN

作　　者：王步清[1] 王清华[2] 陈汉林[2] 肖安成[2] 

机构地区：[1]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [2]浙江大学理学院地球科学系,浙江杭州310027

出　　处：《大地构造与成矿学》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.

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.

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 

分 类 号：P542[天文地球—构造地质学]