徐家围子断陷徐中断裂特征及形成机制  

CHARACTERISTICS AND GENERATING MECHANISM OF XUZHONG FAULT IN XUJIAWEIZI FAULT DEPRESSION

作　　者：李钰玮 陈均亮[2] 张莹[2] 田桂荣 LI Yuwei;CHEN Junliang;ZHANG Ying;TIAN Guirong(No. 6 Oil Production Plant, Daqing Oilfield Co Ltd., Daqing 163114, China;Exploration and Development Research Institute, Daqing Oilfield Co Ltd. , Daqing 163712, China;No. 1 Geophysical Prospecting Company, Daqing Oilfield Co Ltd., Daqing 163357, China)

机构地区：[1]大庆油田有限责任公司第六采油厂,黑龙江大庆163114 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]大庆钻探工程公司地球物理勘探一公司,黑龙江大庆163357

出　　处：《大庆石油地质与开发》2018年第2期34-39,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大科技专项"大庆油气持续有效发展关键技术研究与应用"(2016E-02)

摘　　要：徐家围子断陷深层天然气勘探表明徐中断裂不仅是火山口发育带,同时也是天然气聚集带。为了搞清徐中断裂形成机制及其与沉积岩、火山岩的关系,结合区域构造背景和三维地震资料重新刻画了徐中断裂,并对徐中断裂的演化特征和非后期走滑成因进行了探讨。研究认为:徐中断裂为典型的变换构造,断陷期调整了徐西、宋西2条控陷断裂变形的不协调性,为同沉积的控凹断裂;徐中断裂在沙河子组、营城组一段沉积末期的挤压变形过程中响应强烈,发生了构造反转,沿徐中断裂形成正向构造带,火山口优先发育其上;徐中断裂发育于整个断陷期,并响应于各个改造期,为长期活动的断裂,构造变换带控制了沙河子组扇体和水系的延伸。Deep natural gas exploration in Xujiaweizi Fault Depression shows that the volcanic crater is not only developed in Xuzhong Fault,but also the natural gas is accumulated in the belt way.In order to make clear of the generating mechanism of Xuzhong Fault and its relationships with the sedimentary and volcanic rocks,integrating with the regional structure background and 3 D seismic data,the fault was re-characterized,and moreover the fault evolution characteristics and the non-late-strike-slip genesis were explored.The study shows that Xuzhong Fault is the typical transformed structure,the non-accordance of Xuxi and Songxi two depression-controlled fault deformations were adjusted During the fault stage,they are syndepositional sag-controlling faults;Xuzhong Fault responded intensely in the course of the compressional deformation at the deposition end periods of Shahezi Formation and the1 st member of Yingcheng Formation,and furthermore the structure inversion occurred then,the normal structural belt formed along the Xuzhong Fault,the crater was preferably developed on the belts;Xuzhong Fault was developed in the whole depression period and responsed at various deforming stage and finally became long-period activefault,the structural deforming belt controls the extensions of Shahezi Formation fan-bodies and drainage system.

关 键 词：徐家围子断陷 变换构造 伸展断裂 后期走滑 徐中断裂 

分 类 号：TE121.2[石油与天然气工程—油气勘探]