柴达木盆地诺木洪凹陷构造演化及有利区预测  

Tectonic evolution and favorable area prediction of Nomuhong sag in Qaidam Basin

作　　者：王福 WANG Fu(School of Earth Sciences and Engineering,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China;Key Laboratory of Oil and Gas Accumulation Geology in Shaanxi Province,Xi'an,Shaanxi 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]陕西省油气成藏地质学重点实验室,陕西西安710065

出　　处：《石油地质与工程》2022年第3期13-19,共7页Petroleum Geology and Engineering

摘　　要：在区域构造背景分析的基础上,开展了柴达木盆地诺木洪凹陷构造地层格架、构造演化史研究,以及印支、燕山和喜山构造运动对石炭系残留展布的控制作用分析。结果表明,石炭纪原始沉积在诺木洪凹陷广泛分布;印支晚期,凹陷内部差异隆升,西部石炭系剥蚀殆尽,自西向东在抬升运动较弱的地区残留上石炭统地层;中侏罗世凹陷才开始接受沉积,燕山末期-喜山早期,受东西向挤压形成中生界残留凹陷;喜山中期,发生构造反转,沉积自西向东逐渐扩展,范围逐渐增大。并结合地层沉积、构造演化等研究,从成熟度和生烃演化史两方面对石炭系烃源岩进行评价,落实圈闭发育和展布特征,指出诺木洪凹陷下步油气勘探的有利方向。Based on the analysis of regional tectonic background,the research on the tectonic stratigraphic framework and tectonic evolution history of Nomuhong sag in Qaidam Basin,as well as the control of Indosinian,Yanshan and Xishan tectonic movements on the residual distribution of Carboniferous system are carried out.The results show that the Carboniferous primitive sediments are widely distributed in Nomuhong sag;in the late Indosinian period,the interior of the sag was differentially uplifted,the Carboniferous System in the west was denuded,and the upper Carboniferous strata remained in the area with weak uplift movement from west to east;the middle Jurassic sag began to receive sedimentation.From the end of Yanshan to the early Himalayan,the Mesozoic residual sag was formed by east-west compression;in the middle Himalayan period,structural inversion occurred,and the sedimentation gradually expanded from west to east,and the range gradually increased.Finally,combined with the study of stratigraphic sedimentation and structural evolution,the source rocks are evaluated from two aspects of maturity and hydrocarbon generation evolution history,the trap development and distribution characteristics are implemented,and the favorable direction of oil and gas exploration is pointed out.

关 键 词：诺木洪凹陷 构造格架 构造演化 烃源岩评价 有利区预测 

分 类 号：TE111.2[石油与天然气工程—油气勘探]