准噶尔盆地中4区块构造解析及物理模拟实验  

Geostructural Analysis and Physical Simulation for the 4th Block of the Central Junggar Basin

作　　者：胡秋媛[1] 董大伟[2] 杨建磊[1] 高亮[3] 孔雪[1] 杨光 焦晓倩 HU Qiu-yuan;DONG Da-wei;YANG Jian-lei;GAO Liang;KONG Xue;YANG Guang;JIAO Xiao-qian(Department of Oil&Gas Engineering,Shengli Institute of China University of Petroleum,Dongying 257000,China;Higher Education Research and Evaluation Center,Shengli Institute of China University of Petroleum,Dongying 257000,China;Teaching and Researching Department,Shengli Institute of China University of Petroleum,Dongying 257000,China)

机构地区：[1]中国石油大学胜利学院油气工程学院,东营257000 [2]中国石油大学胜利学院高等教育与评价中心,东营257000 [3]中国石油大学胜利学院教学科研处,东营257000

出　　处：《科学技术与工程》2020年第10期3898-3907,共10页Science Technology and Engineering

基　　金：国家自然科学基金(40772132);中国石油大学胜利学院科研计划重点项目(KY2017010);中国石油大学胜利学院春晖计划项目(KY2018007);中国石油大学胜利学院大学生创新训练计划(2019004)。

摘　　要：准中4区块位于准噶尔盆地腹部地区,发育多个含油构造,油气勘探潜力巨大,但勘探程度较低。综合应用地震、钻井等资料,通过构造精细解释、平衡剖面回剥、断层落差等方法,系统研究准中4区块的几何学、运动学及动力学特征,在此基础上基于相似性原理,通过构造物理模拟实验再现了研究区构造演化过程,从而对研究区动力学成因取得了新的认识。研究表明,准中4区块断层呈带状分布,可划分为董3~董1井断层区、董7~董8井断层区和董6井断层区3个构造分区。其中,董3~董1井区断层为高角度逆冲断层,在J1s^J2t沉积期强烈活动;董7~董8井区断层为高角度正断层和斜滑断层,董6井区断层为高角度"卷心菜式"正断层,均在J1s^J2x沉积期强烈活动。进入白垩纪,研究区内各分区断层活动减弱,代之以区域整体沉降,至新近纪,构造变形以单斜挠曲为主要特征。构造物理模拟实验进一步证实了董3~董1井区断层受控于准南缘冲断和白家海凸起的阻挡,董7~董8井区断层受控于走滑变形机制下三台凸起冲断的后缘拉张。The 4 th block is located in the abdomen area of the Junggar Basin with many oil-bearing structures.It has great potential for oil and gas exploration;however,the degree of exploration is very low.Using comprehensive seismic and drilling data,the geometry,kinematics,and dynamics of the 4 th block were systematically studied by means of structural fine interpretation,balanced profile back-stripping,and fault drop method.By means of the similarity principle,the structural evolution of the study area was reconstructed in the structural physical simulation,which deepened understanding of the dynamic causes.Results show that the faults in the 4 th block are distributed in strips,and can be divided into three fault zones,i.e.,Dong 3~Dong 1,Dong 7~Dong 8,and Dong 6.There is a high-angle thrust fault in Dong 3~Dong 1 zone,which was strongly active during the J1s^J2t deposition period,while Dong 7~Dong 8 zone has a high-angle normal fault and a diagonal slip fault,and the Dong 6 zone features a high-angle"cabbage-type"normal fault.All of them were strongly active during the J1s-J2x deposition period.After entering the Cretaceous,the fault activity in all the zones was weakened,and replaced by the overall regional settlement.To the Neogene,the structural deformation was characterized by monoclinic deflection.The structural physical simulation further confirmed that the faults in the Dong3~Dong1 zone were controlled by the thrust in the south margin of the Junggar Basin and the block of Baijiahai bulge,and the Dong 7~Dong 8 zone was controlled by the trail extension of the three bulge thrusts under the strike-slip deformation mechanism.

关 键 词：准噶尔盆地 中4区块 构造解析 构造物理模拟实验 

分 类 号：TE121[石油与天然气工程—油气勘探]