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物探与化探  2020, Vol. 44 Issue (3): 499-506    DOI: 10.11720/wtyht.2020.1240
     地质调查·资源勘查 本期目录 | 过刊浏览 | 高级检索 |
优势道叠加技术在岩性油气藏识别中的应用
张毅1,2, 毛宁波1(), 何丽娟2
1. 长江大学 油气资源与勘探技术教育部重点实验室,湖北 武汉 430100
2. 中海石油(中国)有限公司 湛江分公司,广东 湛江 524057
Application of advantage trace stacking technique for lithologic reservoirs prospecting
Yi ZHANG1,2, Ning-Bo MAO1(), Li-Juan HE2
1. Key Laboratary of Exploration Technology for Oil and Gas Resources,Yangtze University,Wuhan 430100 China
2. Zhanjiang Branch of CNOOC Ltd.,Zhanjiang 524057,China
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摘要 

WZA-7N构造位于多个物源交汇区,是岩性油藏发育的有利区带,由于受地震资料分辨率的制约,常规的地震资料无法准确地刻画岩性边界,不仅增加了勘探风险,还影响了储量计算结果的可靠性。针对这一勘探难题,根据叠前道集中不同地震道分辨率、成像质量以及反应地质特征的差异性,结合井上合成记录与VSP走廊叠加道上的波组特征,设计了一套优势地震道叠加的技术流程,提高了地震分辨率,重新落实了岩性边界。实践证实,新的岩性解释方案与现有钻井资料吻合较好,进一步表明了优势道叠加技术能够有效提高地震分辨率和岩性边界解释精度,是适合该区岩性油藏精细勘探的实用技术。

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张毅
毛宁波
何丽娟
关键词 叠前道集VSP走廊叠加道优势道叠加地震分辨率岩性边界    
Abstract

WZA-7N structure is located in the intersection area of multiple provenances, which is generally the prospective zone of development of lithological reservoir. Due to the limitation of seismic resolution, conventional seismic data cannot accurately describe lithological boundaries, not only increase the exploration risk, but also affect the reliability of reserve calculation.in face of this exploration problem, according to the difference of every seismic trace in one prestack gather, resolution in every prestack gather in aspect of seismic resolution imaging quality and geological characteristics reaction, combined with the seismic wave group characteristics of well synthetic seismogram and VSP corridor stacking traces, author designed a set of technical process for advantage seismic tace stacking, which can effectively improve seismic resolution and interpreted lithological boundaries again. The subsequent drilling confirmed the correctness of the new lithological interpretation scheme. Practice further shows that the advantage tace stacking technique can effectively improve seismic resolution and interpretation accuracy of lithological boundary, which is a practical technique suitable for fine exploration of lithological reservoirs in weizhouA-7N structure.

Key wordspre-stack gather    VSP corridor stack traces    advantage trace stack    seismic resolution    lithological boundary
收稿日期: 2019-04-28      出版日期: 2020-06-24
:  P631.4  
基金资助:“十三五”国家重大专项“南海西部海域低渗油藏勘探开发关键技术”(2016ZX05024-006)
通讯作者: 毛宁波
作者简介: 张毅(1981-),男,硕士,高级工程师,长期从事油气勘探综合研究工作。Email: zhangyi9@cnooc.com.cn
引用本文:   
张毅, 毛宁波, 何丽娟. 优势道叠加技术在岩性油气藏识别中的应用[J]. 物探与化探, 2020, 44(3): 499-506.
Yi ZHANG, Ning-Bo MAO, Li-Juan HE. Application of advantage trace stacking technique for lithologic reservoirs prospecting. Geophysical and Geochemical Exploration, 2020, 44(3): 499-506.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1240      或      https://www.wutanyuhuatan.com/CN/Y2020/V44/I3/499
Fig.1  WZA-7N构造流一段下层序(T82-T83)沉积相连井剖面
Fig.2  实钻井岩性正演道集与地震道集对比
Fig.3  优势道叠加技术流程
Fig.4  共偏移距道集叠加示意
Fig.5  WZA-7N构造叠前偏移距道集(a)与角道集(b)对比
Fig.6  WZA-7N构造VSP走廊叠加道(a)与分角度道集叠加道(b)对比
Fig.7  VSP走廊叠加道、合成记录与地震剖面对比
Fig.8  实钻井合成记录与VSP走廊叠加道标定剖面
Fig.9  过WZA-7N-2井和WZA-4N-6井常规叠加剖面(a)与优势道叠加剖面(b)对比
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