石油勘探与开发2026，Vol.53Issue(4)：812-825,14.DOI:10.11698/PED.20260014
鄂尔多斯盆地西缘古生界多元油气成藏模式及勘探新领域
Multiple hydrocarbon accumulation models and new exploration areas in the Paleozoic strata in the western margin of the Ordos Basin,NW China
摘要
Abstract
Based on the latest high-precision gravity,magnetic and three-dimensional seismic exploration data in the western margin of the Ordos Basin,the fine analysis of Paleozoic tectonic system and the re-understanding of hydrocarbon accumulation conditions are carried out.The research shows that,by redefining the classification of faults,four types of structural styles are identified,including back thrust belt,hanging wall syncline,footwall in-situ rock mass uplift belt,and strike-slip-thrust imbricate belt.According to the characteristics of source-reservoir configuration,five hydrocarbon accumulation models are established,including the Hengshanbao structural trap gas reservoir group in the northern zone,the tight gas accumulation in the intra-source syncline in the hanging wall and concealed uplift structure controlled accumulation in the footwallof of the thrust belt in the central zone,the low-mature shale self-generation and self-storage in the southern zone,and the grain beach+dual-source hydrocarbon supply in the platform margin.Combined with the analysis of exploration results,five favorable exploration areas are delineated:the Hengshanbao complex structural area in the northern zone,covering 410 km2,which belongs to the realistic and efficient exploration target area;the concealed uplift belt in the central zone,covering 1 800 km2,which is the first breakthrough in the 8th member of Lower Shihezi Formation;the Carboniferous Yanghugou Formation in the central zone,which has been revealed with the potential for coal-rock gas and tight sandstone gas accumulation within the source;the marine shale oil in the Middle Ordovician Wulalike Formation in the southern zone,covering 275 km2,with Well YT3 achieving an industrial breakthrough;and the western platform margin of the Ordovician strata,covering about 5 300 km2.These findings have guiding significance for further breakthrough,expansion,and reserves addition in subsequent oil and gas exploration activities in the western margin of the basin.关键词
鄂尔多斯盆地/西缘冲断带/高精度重磁勘探/构造解析/古生界/成藏条件/勘探新领域Key words
Ordos Basin/western margin thrust belt/high-precision gravity and magnetic seismic exploration/structural analysis/Paleozoic/hydrocarbon accumulation condition/new exploration area分类
能源科技引用本文复制引用
王红伟,魏嘉怡,徐敏,包洪平,杨智,杨亚娟,李涵,刘濮毓,张艳..鄂尔多斯盆地西缘古生界多元油气成藏模式及勘探新领域[J].石油勘探与开发,2026,53(4):812-825,14.基金项目
中国石油油气与新能源分公司科技项目(2023YQXNCS001-05) （2023YQXNCS001-05）
长庆油田深层海相油气创新联合体项目(2024D1JC06) （2024D1JC06）
