哈拉阿拉特山地区构造特征及成因机制模拟

发布时间：2019-03-04 21:01

【摘要】：哈拉阿拉特山地区是准噶尔盆地西北缘山前冲断带的一部分,构造变形复杂。为研究哈山地区的构造变形过程及成因机制,在三维地震资料解释的基础上,根据构造变形样式的差异,划分为西、中、东三段。西段构造变形整体以推覆叠加为主,中段整体表现为冲断叠加的特征,东段主要表现为冲断褶皱的模式。构造变形过程主要经历了早二叠世伸展裂陷、中晚二叠世-三叠纪强烈逆冲推覆、侏罗纪-白垩纪弱挤压逆冲和新生代隆升兼走滑调整四个阶段。采用物理模拟手段对哈山地区不同区段典型剖面的构造变形过程进行了实验研究。结果表明,挤压速率和强度是决定哈山地区不同区段地层叠置程度的主要因素,塑性地层的分布控制了不同区段滑脱断层与冲断断层发育的先后顺序,而塑性地层的长度则决定了滑脱断层的规模。
[Abstract]:The Hararat Mountain area is a part of the Piedmont thrust belt in the northwest margin of Junggar Basin, and its structural deformation is complex. In order to study the process of tectonic deformation and its genetic mechanism in Hashan area, based on the interpretation of three-dimensional seismic data and according to the difference of tectonic deformation patterns, it is divided into three segments: West, middle and east. The whole tectonic deformation of the western segment is dominated by nappe superimposition, the middle segment is characterized by thrust superimposition, and the eastern segment is characterized by thrust fold. The tectonic deformation process mainly experienced four stages: early Permian extensional rift, middle-late Permian-Triassic strong thrust nappe, Jurassic-Cretaceous weak compressional thrust and Cenozoic uplift and strike-slip adjustment. By means of physical simulation, the structural deformation process of typical sections in different sections of Hashan area is studied experimentally. The results show that the compression rate and strength are the main factors to determine the superimposition degree of strata in different sections of Hashan area, and the distribution of plastic strata controls the order of the development of slip faults and thrust faults in different sections. The length of plastic formation determines the scale of slip fault.
【作者单位】：中国石化胜利油田分公司勘探开发研究院;中国石化胜利石油管理局博士后科研工作站;中国石化胜利油田分公司石油工程技术研究院;
【基金】：国家科技重大专项课题“准噶尔盆地碎屑岩层系大中型油气田形成规律与勘探方向”(2011ZX05002-002) 中国石化科技重大攻关课题“哈山构造带成藏主控因素研究”(P13020) 胜利油田分公司博士后科研课题“哈山构造带形成演化及成因机制”(YKB1415)联合资助
【分类号】：P542

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