云南楚雄盆地西部高精度重磁电特征及基底特征  

Basement Structure of Western Chuxiong Basin in Yunnan Province:Using High-Precision Gravity-Magnetic-Electrical Survey

作　　者：张聪[1,2] 石砥石 张子亚[1,2] 陈科 苑坤[2] 乔计花 彭芳苹[4] Zhang Cong;Shi Dishi;Zhang Ziya;Chen Ke;Yuan Kun;Qiao Jihua;Peng Fangping(The Key Laboratory of Unconventional Oil ＆ Gas Geology, China Geological Survey, Beijing 100029, China;Oil ＆ Gas Survey, China Geological Survey, Beijing 100083, China;Development of Geological and Research Center, China Geological Surveys, Beijing 100037, China;Beijing Technology and Engineering Co., Ltd, Beijing 100192, China)

机构地区：[1]中国地质调查局非常规油气地质重点实验室,北京100029 [2]中国地质调查局油气资源调查中心,北京100083 [3]中国地质调查局发展研究中心,北京100037 [4]北京勘察技术工程有限公司,北京100192

出　　处：《吉林大学学报（地球科学版）》2018年第3期863-871,共9页Journal of Jilin University：Earth Science Edition

基　　金：国土资源部全国油气资源战略选区调查与评价项目(XQ2014-04-02);中国地质调查局项目(121201021000150011)~~

摘　　要：楚雄盆地是滇黔桂地区面积最大的含油气盆地,油气勘探进展缓慢,关键问题是基底和沉积盖层展布不清。重磁电是认识和了解盆地基底展布的重要手段。本研究在楚雄盆地西部实施2条区域重磁电测线,并对其进行基底结构的综合解译。结果表明:楚雄盆地西部上三叠统底界的最大埋藏深度为7km,盆地总体走向北西,结晶基底在平川、云南驿、红河断裂以东,猛虎、舍资一线以西地区深度最大为9km;在大姚县和南华县之间形成楚雄盆地最大的磁基底凹陷区,面积达到1 200km^2。Chuxiong basin is the largest petroleum-bearing basin in the Yunnan-Guizhou-Guangxi area,but its progress of oil and gas exploration is slow.The key issue is the unclear structure of thebasement and sedimentary caprock.Two parallel exploration profiles were obtained based on the high precision gravity,magnetic and electrical data,and the basement characteristics and stratigraphic structure were figured out hereupon.The comprehensive exploration results show that the maximum burial depth of bottom boundary is 7 km in the Upper Triassic in the western Chuxiong basin.The overall trend of Chuxiong basin is north-west,and the maximum depth of the crystallization basement is 9 km between the Pingchuan-Yunnanyi-Honghe and the Menghu-Shezi faults.The largest magnetic basement sag in Chuxiong basin exists between Dayao County and Nanhua County,with an area of 1 200 km^2.

关 键 词：基底结构 重力 磁力 大地电磁 楚雄盆地 

分 类 号：P59[天文地球—地球化学]