高校地质学报2017，Vol.23Issue(1)：117-124,8.DOI:10.16108/j.issn1006-7493.2015120
柴达木盆地南翼山构造样式及其与油气成藏关系:三维地震解释新证据
Structural Style and Its Control Effect on Oil and Gas Accumulation in Nanyishan, Southwestern Qaidam Basin:New Evidence from the Interpretation of 3D Seismic Data
摘要
Abstract
The interpretation and structural analysis of 3D seismic data show that two left-lateral strike-slip fault groups parallel to the axis of the anticline (about 310 °) are developed in the two wings of Nanyishan anticline.The overall Nanyishan structure is characterized as positive flower structure,and three groups of secondary fractures can be seen in the crest of the anticline,which well match with R,R',and X in the Riedel shear model respectively.The property and orientation of the secondary fractures indicate that the boundary fault zone of the Nanyishan are dominated by left-lateral strike-slip movement rather than thrusting.Since the late Cenozoic,southwestern Qaidam basin is controlled by the Altyn Tagh fault systems and the Kunbei fault systems in the transpressional tectonic environment as a whole.A transpressional system rather than a thrusting system has formed in this region.The anticlinal dome and extensional second-order faults induced by transpressional structure system is the major controlling factor for the gas accumulation in Nanyishan.Left-lateral transpressional structure and anticlinal dome form the structural trap.Secondary fractures connect source rocks and reservoirs and form the migration pathway and reservoir of oil and gas.关键词
柴达木盆地/南翼山/三维地震解释/走滑断裂/油气成藏Key words
Qaidam basin/Nanyishan/3 D seismic interpretation/strike-slip fault/oil and gas accumulation分类
天文与地球科学引用本文复制引用
杜威,刘润超,程翔,郭召杰,张启全,王传武..柴达木盆地南翼山构造样式及其与油气成藏关系:三维地震解释新证据[J].高校地质学报,2017,23(1):117-124,8.基金项目
中油股份科技重大专项(2011E-03) （2011E-03）
