石油实验地质2024，Vol.46Issue(3)：542-552,11.DOI:10.11781/sysydz202403542
鄂尔多斯盆地东部高家堡地区下古生界断裂分层变形特征及形成机制
Characteristics and formation mechanism of stratified deformation of Lower Paleozoic faults in Gaojiapu area,eastern Ordos Basin
摘要
Abstract
In recent years,exploration breakthroughs have been successively achieved in the strata deeper than the fifth member of the Lower Ordovician Majiagou Formation in the Ordos Basin,revealing its tremendous exploration potential.With the deployment of high-precision 3D seismic data and the deepening of oil and gas exploration,the control exerted by faults on the gas reservoirs in the deeper layers of the fifth member has become increasingly prominent.Based on high-precision 3D seismic data,this study systematically characterized the geometric features of faults in the Gaojiabao area,dissected typical fault structural patterns,established fault formation and evolution models,and,in conjunction with drilling and testing data,discussed the control of faults on the differential enrichment of gas reservoirs in the deeper layers of the Majiagou Formation.The study yielded the following insights:Faults in the Lower Paleozoic of the Gaojiabao area in the Ordos Basin exhibit distinct stratified deformation characteristics,with the two sets of gypsum-salt rocks in the third and fifth members being major contributors to fault stratification.The Lower Paleozoic in the Gaojiabao area mainly develops strike-slip faults with compressional and torsional properties and thrust faults.Through studying the structural morphology and fault patterns of the Gaojiabao area,it is inferred that the Yanshan tectonic movement was the most signifi-cant phase of reformation affecting the faults formed during the Caledonian tectonic movement.The coupling of the structural uplift period with the oil-gas charging period in the Gaojiabao area means that faults play multiple roles,including improving reservoirs,connecting source rocks,and controlling traps.关键词
燕山期/加里东期/断裂分层/奥陶系/高家堡地区/鄂尔多斯盆地Key words
Yanshanian age/Caledonian age/fault stratification/Ordovician/Gaojiapu area/Ordos Basin分类
能源科技引用本文复制引用
陈平,李明瑞,李维,强敏,路鹏程,于小伟,韩伟..鄂尔多斯盆地东部高家堡地区下古生界断裂分层变形特征及形成机制[J].石油实验地质,2024,46(3):542-552,11.基金项目
中国石油科学研究与技术开发项目"海相碳酸盐岩重点领域综合地质研究与高效勘探关键技术攻关"(2022KT0103)资助. （2022KT0103）
