塔里木盆地玉北三维区撕裂断层特征及形成机制  

Deformation characteristics and formation mechanism of tear faults in Yubei 3D area,Tarim basin

作　　者：杨勇[1,2] 汤良杰[1,2] 余腾孝[3] 陈刚[1,2] 岳勇[3] 赵彬彬[1,2] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国石油大学盆地与油藏研究中心,北京102249 [3]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《中国矿业大学学报》2014年第3期442-447,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(41172125;40972090);国家重点基础研究发展计划(973)项目(2012CB214804;2005CB422107);中国石油化工股份有限公司项目(P11086);国家科技重大专项(2011ZX05002-003-001);中石化西北油田分公司项目(KY2012-S-051)

摘　　要：为了确定玉北三维区撕裂断层的形成机制,利用构造要素相关性分析及构造解析方法,通过三维地震资料解释,揭示了玉北三维区撕裂断层的构造变形特征,确定了研究区撕裂断层的形成演化模式.结果表明:玉北三维区发育的撕裂断层在地震剖面上表现为高陡断裂带,具有明显的花状构造特征.根据撕裂断层两侧断块运动方向和断块间的相对运动方向,可以将玉北三维区发育的撕裂断层分为单侧逆冲型和同向差异逆冲型两种类型.这些撕裂断层的形成演化明显受基底断层和区域挤压应力的控制.先存基底断层控制后期撕裂断层的发育位置和展布方向,区域挤压应力在基底断层两侧造成的位移变形量差异为撕裂断层的形成提供了动力来源.The correlation method of structural factors and structural analysis were used to determine the formation mechanisms of tear faults in the Yubei 3D area in this paper. The interpretation of 3D seismic data shows defromation characteristics of the tear faults, and their evolution has been modeled. The results show that： tear faults which developed in study area shows as high-steep faults on the seismic profiles, and they appear flower structures. According to the relative movement direction of the fault blocks, the tear faults can be divided into unilateral thrust type and differential thrust type. The formation of tear faults was jointly controlled by the pre-existing basement faults and regional compressive stress. The pre-existing basement faults controlled the position and orientation of the later tear faults, and the differential displacement on two sides of basement faults resulted from regional compressive stress pro- vided driving forces for the development of the tear faults.

关 键 词：玉北地区 撕裂断层 花状构造 基底断层 形成机制 

分 类 号：P542.3[天文地球—构造地质学]