地质科学2024，Vol.59Issue(2)：300-312,13.DOI:10.12017/dzkx.2024.021
新疆克拉玛依乌尔禾张扭性走滑断裂特征及其控藏作用研究
Characteristics of transtensional strike-slip faults and its controlling effect on hydrocarbon accumulation in Wuerhe area,Karamay,Xinjiang
摘要
Abstract
Wuerhe bituminous vein is a small left-lateral strike-slip fault zone situated above the Wuerhe nasal uplift of the Wuxia fault zone in the northwest margin of the Junggar Basin.Following its formation,no significant transformation occurred,and vein-type bitumen deposits have developed within the fault zones.With favorable outcrop geological conditions and comprehensive three-dimensional seismic coverage,this area serves as a natural laboratory for studying strike-slip faults and reservoir control characteristics.In this study,UAV 3D modeling technology is employed to quantitatively analyze and dissect the outcrop of the strike-slip fault zone,combined with field section measurements.Seventeen faults are revealed in the fault zone,exhibiting a geese-like pattern on the northwest side of the main fault and a horsetail-like pattern on the southeast side,resulting in an overall negative flower-shaped fault zone.These results indicate that the formation of the faults can be attributed to Yanshanian sinistral shear stress within a tension-torsion environment influenced by tensile stress.The fracture cavity and induced fractures,particularly the active disk fracture,are well-developed.The opening of the cavity is positively correlated with the width of oil and gas infiltration.Based on the analysis of the relationship between transtensional strike-slip faults and reservoirs in Tarim Basin,it is believed that these faults serve as excellent vertical channels for hydrocarbon migration,active disks act as conduits while passive disks function as seals,traps located adjacent to active-disk of strike-slip faults represent ideal areas for oil and gas accumulation.关键词
准噶尔盆地西北缘/乌夏断裂带/乌尔禾沥青矿断裂带/左旋张扭性走滑断裂/控藏作用Key words
Northwestern margin of Junggar Basin/Wuxia fault belt/Wuerhe bituminous vein/Transtensional strike-slip faults/Reservoir control分类
天文与地球科学引用本文复制引用
孟凡超,白沅可,祝贺,王胜利..新疆克拉玛依乌尔禾张扭性走滑断裂特征及其控藏作用研究[J].地质科学,2024,59(2):300-312,13.基金项目
国家自然科学基金项目(编号:42272225)、崂山实验室科技创新项目(编号:LSKJ202203401)、山东省自然科学基金面上项目(编号:ZR2021MD083)和中央高校基本科研业务费专项(编号:23CX09004A)资助 （编号:42272225）
