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库车山前带高陡盐下构造三维采集技术及效果
3D SEISMIC ACQUISITION FOR HIGH-STEEP SUBSALT STRUCTURE, KUCHE MOUNTAIN FRONT BELT
江民1 周旭2 刘依谋1 刘新文2 孔德政2
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作者单位:1.中国塔里木油田公司勘探开发部 2.中国石油东方公司塔里木物探处
中文关键字:库车坳陷 地震采集 宽方位 井震联合激发 高效施工表层调查
英文关键字:Kuche Depression, seismic acquisition, wide azimuth, combined excitation of seismic source, effective operation, near surface investigation
中文摘要:  塔里木盆地库车山前带地表和地下构造都十分复杂,地震勘探难度大。以往地震资料偏移成像效果差,层位识别及断层解释困难,无法精细描述气藏形态和断层发育特征。此次地震资料利用高密度宽方位观测改善盐下断块的偏移归位效果,采用微测井与浅层层析相结合的表层调查及建模技术提高表层模型精度,利用井震联合激发及高效施工配套技术提高采集质量和效率。在库车坳陷西部的三维项目中,通过应用上述技术措施,提升了采集效果和施工效率,获得的三维地震资料信噪比高、偏移成像效果好,为油气藏评价提供了可靠资料。

 

英文摘要:  In Kuche mountain front belt of Tarim Basin, both surface and subsurface structures are very complex, resulting in a lot of difficulties in a seismic exploration. In the past, not only poor effect of migration imaging but also some difficulties existing in both reservoir identification and fault interpretation all lead to being incapable of fine description for reservoir geometry and fault development. However, in this study, a migration homing effect can be improved by high-density wide-azimuth observation in subsalt fault block. An accuracy of near-surface model may be increased by near-surface investigation and modeling technology combining micro well logging and shallow tomography. And acquisition quality and efficiency can be also perfected by means of combined excitation of seismic source and effective operation technology. These procedures have been applied to the western Kuche Depression. As a result, seismic acquisition effect and operation efficiency increase. For some obtained 3D seismic data, the SNR is high and the migration imaging effect is better, which can provide reliable data for reservoir evaluation.

  

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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
主管单位:中国石油西南油气田公司  主办单位:中国石油西南油气田公司勘探开发研究院
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