柴北缘西段新生代弧形构造带演化历史及成藏过程  

Evolution History and Hydrocarbon Accumulation Process of the Late Cenozoic Arcuate Tectonic Zone in the West Section of the Northern Margin of Qaidam Basin

作　　者：马新民[1,2] 刘池阳[1] 罗金海[1] 陈大友[1] 张建魁 

机构地区：[1]西北大学地质学系,大陆动力学国家重点实验室(西北大学),陕西西安710069 [2]中国石油勘探开发研究院西北分院,甘肃兰州730020 [3]中国石油长庆油田分公司,陕西西安710069

出　　处：《地质与勘探》2016年第2期316-326,共11页Geology and Exploration

基　　金：国家科技重大专项(2011ZX05007-006);中国石油天然气股份有限公司重大科技项目(2011E-0301)联合资助

摘　　要：本文在钻井和二、三维地震数据精细解释的基础上,详细研究了柴北缘西段晚新生代弧形构造带演化历史和油气成藏过程。认为柴北缘西段是由一系列沿造山带前缘展布的弧形逆冲断裂和褶皱组成的弧形构造带。晚新生代以来的构造演化具有自山前向盆内扩展,东西两侧向中间传播的特点,油气运聚与构造演化过程紧密耦合。各弧形构造带两侧形成时间早,生储盖配置好,且具有古构造背景,是油气运聚的长期指向,应是下一步优先勘探目标。In a long time,＂ Resverse-S type structural system＂ model was used to interprete formation mechanism of the late Cenozoic structural deformation in west part of the northern Qaidam Basin. It paid much emphasis on strike-slip effect of Altyn fault, but ignored overall tectonic background of extrusion and contraction in the late Cenozoic, Based on the data frmn field outcrop, drilling well and seismic interpretation, combined with analysis on the paleogeography and tectonic evolution, this paper put forward the new understanding of arcshaped deformation in west part of the northen Qaidam basin and discussed its formation mechanism and hydrocarbon accumulation in detail, it draw the conclusion as follows： （1） Arcshaped thrust faults and folds make up the late Cenozoic arcuate structural belts in the west part of the northern Qaidam Basin, recent ＂ Reverse-S type＂ distribution on the plan is the result of the moification of arcshaped structural behs due to the differential sliding of basement fault. （2） Bedrock uplift, basement faults and thickness difference of sedimentary cover are the main control factors for formation mechanism of late Cenozoic arcuate structural belts. （3） Tectonic ew）lutiou has the characteristics of extending from edge to abdomen and spreading from both sides to middle. （4） it is paleostructure located at both sides of arcuate structural belts that would be tbe faw）rable exploration areas.

关 键 词：弧形构造带 构造演化 油气成藏 柴达木盆地 

分 类 号：P618.130.21[天文地球—矿床学]