Geological structures and potential petroleum exploration areas in the southwestern Sichuan fold-thrust belt, SW China

作     者：CHEN Zhuxin WANG Lining YANG Guang ZHANG Benjian YING Danlin YUAN Baoguo PEI Senqi LI Wei CHEN Zhuxin;WANG Lining;YANG Guang;ZHANG Benjian;YING Danlin;YUAN Baoguo;PEI Senqi;LI Wei

作者机构：Research Institute of Petroleum Exploration&DevelopmentPetroChinaBeijing 100083China Key Laboratory of Basin Structure&Hydrocarbon AccumulationCNPCBeijing 100083China Research Institute of Petroleum Exploration&DevelopmentPetroChina Southwest Oil&Gas Field CompanyChengdu 610041China Northwest of Sichuan Gas Production DistrictPetroChina Southwest Oil&Gas Field CompanyJiangyou 621700China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2020年第47卷第4期

页      面：699-713页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Supported by the Petro China Science and Technology Project(2016E-0601,2019B-0503) China National Science and Technology Major Project(2016ZX05003-001) 

主　　题：eastern Tibet Plateau Sichuan Basin deep geological structure fold-thrust belt structural deformation petroleum exploration 

摘      要：Based on the latest geological,seismic,drilling and outcrop data,we studied the geological structure,tectonic evolution history and deformation process of the southwestern Sichuan fold-thrust belt to find out the potential hydrocarbon exploration areas in deep *** key tectonic periods,the southwestern Sichuan fold-thrust belt developed some characteristic strata and structural deformation features,including the Pre-Sinian multi-row N-S strike rifts,step-shaped platform-margin structures of Sinian Dengying Formation,the western paleo-uplift in the early stage of Late Paleozoic,the Late Paleozoic–Middle Triassic carbonate platform,foreland slope and forebulge during Late Triassic to Cretaceous,and Cenozoic multi-strike rejuvenated fold-thrusting *** fold-thrust belt vertically shows a double-layer structural deformation controlled by the salt layer in the Middle Triassic Leikoupo Formation and the base detachment layer at *** upper deformation layer develops the NE-SW strike thrusts propagating toward basin in long distance,while the deeper deformation layer had near north-south strike basement-involved folds,which deformed the detachment and thrusting structures formed earlier in the upper layer,with the deformation strength high in south part and weak in north *** southern part of the fold-thrust belt is characterized by basement-involved fold-thrusts formed late,while the central-northern part is dominated by thin-skin thrusts in the shallow *** Wuzhongshan anticlinal belt near piedmont is characterized by over-thrust structure above the salt detachment,where the upper over-thrusting nappe consists of a complicated fold core and front limb of a fault-bend fold,while the deep layer has stable subtle in-situ *** exploration strata and areas have been identified both in the upper and deeper deformation layers separated by regional salt detachment,wherein multiple anticlinal structures are targets for exploration