基于高密度地震反射和砂箱实验的准噶尔盆地南缘霍尔果斯背斜深层构造解析  

Deep structure analysis of Huoerguosi Anticline at the southern margin of Junggar Basin based on high-density seismic reflection and sandbox modeling

作　　者：马德龙 袁剑英[1,2] 张虎权 何登发[3] 潘建国[1] 潘树新[1] 王宏斌[1,2] 魏东涛[4] 王彦君 崔键 MA Delong;YUAN Jianying;ZHANG Huquan;HE Dengfa;PAN Jianguo;PAN Shuxin;WANG Hongbin;WEI Dongtao;WANG Yanjun;CUI Jian(Research Institute of Petroleum Exploration and Development-Northwest,PetroChina,Lanzhou 730020,China;Key Laboratory of Reservoir Description,PetroChina,Lanzhou 730020,China;School of Energy Resources in China University of Geosciences,Beijing 100083,China;Xi'an Center of Geological Survey,CGS,Xi'an 710054,China;School of Earth Sciences and Engineering in Nanjing University,Nanjing 210093,China)

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]中国石油油藏描述重点实验室,甘肃兰州730020 [3]中国地质大学(北京)能源学院,北京100083 [4]中国地质调查局西安地调中心,陕西西安710054 [5]南京大学地球科学与工程学院,江苏南京210093

出　　处：《中国石油大学学报（自然科学版）》2018年第6期9-18,共10页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家科技重大专项(2016ZX05003-002)

摘　　要：利用霍尔果斯背斜高密度三维地震反射资料和砂箱模拟实验,并根据构造几何学的分析方法,获得准噶尔盆地南缘霍尔果斯背斜的深部地质结构及运动学演化过程。结果表明:霍尔果斯背斜高密度三维地震反射揭示安集海河组(E2-3a)滑脱层冲出地表、上盘形成单斜构造;下侏罗统滑脱层与安集海河组(E2-3a)滑脱层构成深部构造楔,构造楔缩短量为2 306 m,平均缩短率为2 mm/a;下侏罗统深部下凹的地震反射特征揭示深层可能发育早期断陷。先存断陷和同构造沉积控制下的双层滑脱构造物理模拟实验结果与霍尔果斯背斜高密度三维地震反射形态相近,并且其运动学特征也一致。获得的霍尔果斯深层构造楔变形速率明显低于前人通过其他方式获得的相邻区域浅层变形速率,可能是由于北天山山前发育多套塑性滑脱层,并在挤压过程中塑性地层内部层间剪切作用造成的;另外,研究区下侏罗统及以下地层可能发育早期的断陷,并对晚期构造变形有一定的控制作用。High-density seismic reflection data and sandbox physical modeling method were used to obtain the deep structure and evolution history of the Huoerguosi Anticline at the southern margin of Junggar Basin.E 2-3 a detachment fault thrusts northward and outcrops at the ground surface,and the hanging wall layers dip southward to form monoclonal structure.The lower Jurassic detachment is combined with the E 2-3 a detachment fault,forming a structural wedge in the deep with shorting up to 2 306 m and at a rate of 2 mm/a.The layers below lower Jurassic may develop earlier fault depression.In the sandbox modeling which were controlled by the early fault depression and syn-tectonic sediment,the similar structure style as seen in the seismic profile was obtained,and the kinematic features are consistent between the sandbox modeling and the geological structure obtain from seismic reflection.The shorting rate calculated in this paper is much smaller than that from previous studies of shallow layers or at ground surface,which may result from the velocity difference between layers in multiple detachment layers in this area.The early fault depression structure may exert great influence on the subsequent structural evolution in the region.

关 键 词：准噶尔盆地南缘 霍尔果斯背斜 砂箱模型 深层结构 

分 类 号：P542[天文地球—构造地质学]