准噶尔盆地南缘复式背斜类型及下部成藏组合成藏特征  

Types of Composite Anticlines and Pool Formation Characteristics of the Lower Play in Southern Margin of the Junggar Basin

作　　者：丁玉才 向英杰 赵进雍[1] 康永尚[2,3] 袁春林[2] Ding Yucai;Xiang Yingjie;Zhao Jinyong;Kang Yongshang;Yuan Chunlin(Institute of Geophysics,Reserch Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Urumqi,Xinjiang,830013,China;China University of Petroleum,Beijing,102249,China;State Key Laboratory of Petroleum Resources and Prospecting,Beijing,102249,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830013 [2]中国石油大学(北京)地球科学学院,北京102249 [3]油气资源与探测国家重点实验室,北京102249

出　　处：《新疆地质》2021年第2期254-263,共10页Xinjiang Geology

基　　金：国家科技重大专项(2016ZX05003-005);国家科技重大专项(2016ZX05047-001-004);新疆大庆重大科技专项(2017E-0403)共同资助。

摘　　要：在前人研究基础上,据新采集的二维和三维地震剖面及重新处理的二维和三维剖面等资料,对南缘主要复式背斜开展构造解释。将南缘复式背斜类型进行划分,对复式背斜下部成藏组合成藏特点进行分析与探讨,认识如下:①准噶尔盆地南缘复式背斜可划分为继承型、走滑型、反转型、三重叠置型和隐伏型;②继承型复式圈闭发育于构造位移较小的第二排(高泉背斜)及第三排背斜带(呼图壁背斜)中;走滑型发育于天山挤压冲断和准噶尔盆地西缘褶皱山系阻挡的共同作用区,包括安集海背斜、独山子背斜及四棵树凹陷艾卡构造带上的西湖背斜和卡因迪克背斜等;反转型(东湾背斜)位于山前近EW向展布的第一排背斜带和第二排背斜带之间;三重叠置型复式背斜位于第二排背斜带(霍-玛-吐);隐伏型复式背斜位于山前第一排背斜带冲断带的下盘;③下部成藏组合(侏罗系—下白垩统)在不同类型复式背斜中具不同成藏特点,位于四棵树凹陷的继承型复式背斜(高泉背斜)以燕山期圈闭的后期强化为主,主要聚集了早期生成的液态烃。四棵树凹陷走滑型复式圈闭及独山子、独南等走滑型复式圈闭以液态烃为主;位于第三排背斜带的呼图壁继承型复式背斜以晚期捕获周缘高成熟烃源岩排出的气态烃为主,位于第一排背斜带及第二排背斜带之间的东湾反转型复式背斜和位于第二排背斜带的霍尔果斯、玛纳斯和吐谷鲁三重叠置型复式背斜以气态烃为主;位于第一排背斜带逆冲带下盘的隐伏型复式背斜于燕山期形成,预测以液态烃为主;④液态烃分布受到复式背斜捕获油气时周缘烃源岩的演化程度控制。其中,燕山期背斜区域更有利于早期烃类的捕获,可能为含油构造,隐伏型复式背斜很可能为最有潜力的含油构造。建议以寻找大-中型油田为主要目标,加快四棵树凹陷继承型及走滑型�Based on previous research work results,composite anticlines are tenuously interpreted from newly acquired 2D and 3D seismic data and reprocessed 2D and 3D seismic in the southern thrusted belt.The types of the composite an-ticlines are classified and the pooling characteristics in the lower play are discussed.The following conclusions are drawn:1)The composite anticlines can be classified as inherited,strike-slip,reversed,three-level superposed and buried types according to mainly the relative position of anticlinal highs in different layers;2)The inherited composite anti-clines develop in small structural displacement area,situated in the second anticlinal belt(Gaoquan anticline)and in the third anticlinal belt(Hutubi anticline).The strike-slip composite anticlines,including Anjihai,Dushanzi anticlines and that in the Aika anticlinal belt in Sikeshu depression,occur in a tectonic setting where both the Tianshan compressional thrusted force,and the resisting force from the western orogen of the Junggar Basin,take in action.The reversed compos-ite anticline refers to Dongwan anticline that is situated in between the first and the second almost E-W extended anticli-nal belts.The three-level superposed composite anticlines are situated in the second anticlinal belt(Huo-Ma-Tu).The subtle composite anticlines are situated in the footwall of thrusted faults under the first anticlinal belt.3)In the lower play(Jurassic-Lower Cretaceous),different pool formation characteristics exist for different composite anticline types.The in-herited composite anticline(Gaoquan anticline)formed mainly during Yanshan orogeny and enhanced during Himalayan orogeny has captured mainly oil generated from surrounding source rocks,so as to the strike-slip composite anticlines in Sikeshu depression and Dushanzi,Dunan strike-slip composite anticlines.The inherited composite anticline(Hutubi anti-cline)has mainly captured gas generated from the surrounding high maturity source rocks,so as to the reversed compos-ite anticline(Dongwan anticline

关 键 词：断层相关褶皱 背斜带 复式背斜 挤压和冲断 滑脱 走滑 成藏特征 

分 类 号：P618.13[天文地球—矿床学]