广域电磁法在豫西地区济源凹陷古生界油气勘探中的应用  

Application of the Wide Field Electromagnetic Method to Paleozoic Oil and Gas Exploration in the Jiyuan Depression of Western Henan Province

作　　者：王丹丹 张交东[1,2] 刘旭锋 邵昌盛[3] 曾秋楠 张文浩[1,2] 刘钊[3] WANG Dandan;ZHANG Jiaodong;LIU Xufeng;SHAO Changsheng;ZENG Qiunan;ZHANG Wenhao;LIU Zhao(Oil&Gas Survey,China Geological Survey,Beijing 100083;Key Laboratory of Unconventional Oil and Gas,China Geological Survey,Beijing 100029;The 282 Team of Sichuan Nucleus Industrial Geology Bureau,Deyang,Sichuan 618000)

机构地区：[1]中国地质调查局油气资源调查中心,北京100083 [2]中国地质调查局非常规油气重点实验室,北京100029 [3]四川省核工业地质局二八二大队,四川德阳618000

出　　处：《地质与勘探》2023年第2期328-336,共9页Geology and Exploration

基　　金：中国地质调查局地质调查项目(编号:DD20190095);国家重大科技专项(编号:2016ZX05034-004-006)联合资助。

摘　　要：豫西地区济源凹陷由山地和丘陵组成,地形条件复杂,地震资料品质较差,盆地内断裂形态结构、深部古生界展布特征等不清楚,制约着济源凹陷的油气勘探和资源潜力评价。本文利用广域电磁法在豫西地区济源凹陷进行方法应用研究,采用“地球物理资料综合处理解释一体化系统”进行数据处理与反演,获得了地下真实的电性特征,建立了目标层与视电阻率的电性关系,刻画了研究区目标层的构造特征。本研究查明了济源凹陷西部斜坡的断裂结构特征,新识别出12条断裂;揭示石炭-二叠系厚度分布范围在200~1800 m,最大埋深2200 m;奥陶系顶界面埋深分布在300~2450 m,呈“条带状”展布,得到了地质调查井岩心编录的证实。The Jiyuan depression possesses complex topography with both mountains and hills,which has resulted in poor quality of seismic data.The unclear understanding of the fault structures and the distribution of deep Paleozoic strata in the depression has restricted the oil and gas exploration and resource evaluation.This work applied the wide field electromagnetic method to the Jiyuan depression to verify the effectiveness of this method.The integrated system of geophysical data comprehensive processing and interpretation was utilized for data processing and inversion.The real underground electrical characteristics were obtained,the electrical relationship between target layer and apparent resistivity was established,and the structural characteristics of the target layer in the study area were described.In this study,the fault structural characteristics in the western slope of Jiyuan depression were identified,and 12 new faults were identified.It is revealed that the thickness of the Carboniferous-Permian is 200~1800 m,and the maximum burial depth is 2200 m.The burial depth of the top interface of the Ordovician ranges from 300 to 2450 m,showing a banded distribution,which was confirmed by the core logging of geological survey wells.

关 键 词：广域电磁法 油气勘探 石炭-二叠系 奥陶系 下古生界 济源凹陷 豫西 

分 类 号：P631[天文地球—地质矿产勘探]