中亚费尔干纳盆地构造演化和油气远景浅析  

Tectonic evolution and hydrocarbon prospect in the Fergana basin,Central Asia

作　　者：李春麟[1,2] 张凯逊 郭振华 韩淑琴 Bakhtier NURTAEV[5] Pulatjon SULTONOV Shukhrat SHUKUROV 陶涛 LI Chunlin;ZHANG Kaixun;GUO Zhenhua;HAN Shuqin;Bakhtier NURTAEV;Pulatjon SULTONOV;Shukhrat SHUKUROV;TAO Tao(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;Key Laboratory of Paleomagnetism and Tectonic Reconstruction,Ministry of Natural Resources,Beijing 100081,China;Key Laboratory of Petroleum Geomechanics,China Geological Survey,Beijing 100081,China;Beijing Xinxinghua􀆳an Intelligence Technology Co.Ltd.,Beijing 100071,China;Institute of Geology and Geophysics,State Committee on Geology and Mineral Resources of Uzbekistan,Tashkent 100041,Uzbekistan;Geology and Geoinformation System Faculty,National University of Uzbekistan,Tashkent 100174,Uzbekistan)

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]自然资源部古地磁与古构造重建重点实验室,北京100081 [3]中国地质调查局油气地质力学重点实验室,北京100081 [4]北京新兴华安智慧科技有限公司,北京100071 [5]乌兹别克斯坦地质与矿产资源国家委员会地质与地球物理研究所,塔什干100041,乌兹别克斯坦 [6]乌兹别克斯坦国立大学地质与地球信息系统学院,塔什干100174,乌兹别克斯坦

出　　处：《地质学报》2023年第2期480-495,共16页Acta Geologica Sinica

基　　金：中国地质科学院地质力学研究所基本科研业务费项目(编号2019JK019);中国地质调查局地质调查项目(编号DD20190664)联合资助的成果。

摘　　要：中亚地区油气资源丰富并且出口潜力巨大,加强与中亚国家的能源合作可以增加我国能源安全的系数。本文以中亚费尔干纳盆地为主要研究对象,通过野外构造变形的解析,发现盆缘发育典型的无序型逆冲断层。以此为基础,结合盆地的沉积环境更替,讨论了费尔干纳盆地中生代以来的构造演化。费尔干纳盆地的基底形成于晚古生代,与石炭纪末期南天山洋的关闭有关。三叠纪至侏罗纪,费尔干纳盆地进入了陆内坳陷阶段,沉积了一套河湖相碎屑岩。侏罗纪末期至白垩纪的早期,受中特提斯洋关闭的影响,费尔干纳盆地进入挤压阶段。白垩纪至古近纪,天山造山带以南地区受新特提斯洋扩张的影响,发生了区域性海侵事件,生物繁盛,沉积了优质的烃源岩。古近纪与新近纪之交,随着阿拉伯地块与欧亚大陆的碰撞,新特提斯洋最终关闭,盆地再次进入挤压阶段。新近纪至第四纪时期,盆地内沉积了巨厚的陆相碎屑,不整合地覆盖于古近系之上。受印度与欧亚大陆持续汇聚作用影响,费尔干纳盆地在第四纪进入了前陆盆地演化阶段。通过南天山板块缝合带南、北两侧含油气盆地生储盖组合及构造演化的对比,发现费尔干纳盆地上古生界具有较好的油气资源潜力。我们的研究扩展了费尔干纳盆地的油气前景。Central Asia is rich in oil and gas resources and has great export potential.Strengthening energy cooperation with Central Asian countries can increase the coefficient of China’s energy security.In this paper,the Fergana basin in Central Asia is taken as the main research object.Through the analysis of structural deformation,it is found that the typical out-of-sequence thrust faults are developed in the margin of the Fergana basin.Combined with the sedimentary environment replacement of the basin,the tectonic evolution of the Fergana basin since the Mesozoic is reconstructed.The basement of Fergana basin was formed in the Late Paleozoic,which is related to the closure of the Southern Tianshan Ocean at the end of the Carboniferous.From Triassic to Jurassic period,Fergana basin entered the intracontinental depression stage and deposited a set of fluvial and lacustrine clastic rocks.Late Jurassic-early Cretaceous period,due to the closure of the Meso-Tethys,the Fergana basin turned into the compression stage.From Cretaceous to Paleogene,influenced by the expansion of the Neo-Tethys Ocean,a regional transgression event occurred in the south of the Tianshan Orogenic Belt.A large number of organisms developed,and high-quality source rocks were deposited in the basin.With the collision between the Arabian block and Eurasia continent across the Paleogene and Neogene transition,the Neo-Tethys Ocean finally closed,and the Fergana basin entered the compressional stage again.From Neogene to Quaternary period,a huge thickness of continental clastic deposit was deposited in the basin,and angular unconformity between Paleogene and Neogene was developed in the basin.Under the influence of continuous convergence between India and Eurasia continents,the Fergana basin began the foreland basin evolution stage during the Quaternary.Through the comparison of source-reservoir-cap rock assemblages and tectonic evolution of petroliferous basins in the northern and southern flanks of the South Tianshan Suture,it is found that the Upper

关 键 词：无序型逆冲断层 构造演化 石炭系—二叠系 油气前景 费尔干纳盆地 

分 类 号：P618.13[天文地球—矿床学]