重磁电震综合物探技术在准噶尔盆地车排子凸起南火山岩性预测中的应用  

Comprehensive geophysical prospecting technology of gravity,magnetism,electricity and seism for volcanic lithology prediction of south Chepaizi Uplift in Junggar Basin

作　　者：仲伟军[1] 党志敏[1] 郭忠[1] ZHONG Weijun;DANG Zhimin;GUO Zhong(Geophysical Research Institure of Exploration and Development Research Institute of Xinjiang Oilfield Company,CNPC,Urumqi 830013,China)

机构地区：[1]新疆油田公司勘探开发研究院地球物理研究所

出　　处：《复杂油气藏》2019年第3期32-36,共5页Complex Hydrocarbon Reservoirs

基　　金：国家科技重大专项(2016ZX05003-005);新疆油田股份公司重大专项《新疆和吐哈油田勘探开发关键技术研究与应用》下属课题《准噶尔盆地油藏富集规律及勘探技术研究与应用》(2017E-0401)

摘　　要：通过对已知油气藏精细解剖,认为准噶尔盆地车排子凸起南石炭系油藏为构造控制的岩性油气藏。但已有的三维地震资料内幕成像质量较差,对石炭系地层格架及火山平面分布特征难以清晰认识,制约了油气勘探的全面展开。利用重、磁、电、震、井综合地球物理技术,通过井-震标定,对石炭系火山岩目的层进行地震对比追踪;基于密度、磁化率、极化率异常匹配关系,对石炭系基底断裂、局部构造、火山岩分布进行研究,在平面、空间上识别出一系列纵横叠置、不同序列、不同期次的火山岩体;推测了三个上石炭统残留洼槽,主要分布在HG6井西、KB1井区以及SM4井区;石油地质条件分析基础上,综合评价了五个含油气有利目标,八个含油气较有利目标,为下一步油气勘探及井位部署提供了理论依据。实践证明,高精度的重、磁、电、井、震综合地球物理勘探技术,是解决石炭系火山岩油气勘探的一个重要手段。Through fine dissection of known Carboniferous reservoirs,it is considered that the south Carboniferous reservoirs in Chepaizi Uplift are structural-controlled lithologic reservoirs. However,the existing three-dimensional seismic data of the Carboniferous are poorly imaged,and the Carboniferous framework and volcanic plane distribution characteristics are not clearly understood,which restricts the comprehensive development of Carboniferous oil and gas exploration. In this paper,by means of gravity,magnetism,electricity,seism and well integrated geophysical techniques and well seismic calibration,it was carried out the seismic correlation and tracing of the target strata of Carboniferous volcanic rocks. Based on the matching relationship of density,susceptibility and polarizability anomalies,it was carried out studies on the distribution of basement faults,local structures and volcanic rocks in Carboniferous system. A series of vertical and horizontal overlaps,different sequences and non-volcanic rocks are identified in plane and space. Three residual depressions of Upper Carboniferous are presumed,mainly distributed in the west of well HG6,well KB1 and well SM4. Based on the analysis of petroleum geological conditions,five favorable targets and eight relatively favorable targets for oil and gas are synthetically evaluated,to provide a theoretical basis for further oil and gas exploration and well location deployment. Practice has proved that high-precision integrated geophysical exploration technology of gravity,magnetism,electricity,well and earthquake is an important means to solve hydrocarbon exploration in Carboniferous volcanic rocks.

关 键 词：重磁电震 综合地球物理技术 井震标定 石油地质条件 综合评价 有利目标 

分 类 号：TE122[石油与天然气工程—油气勘探]