滨里海盆地盐下构造处理解释一体化研究  

THE INTEGRATATION FOR PROCESSING AND INTERPRETATION OF SUB-SALT STRUCTURE IN PRE-CASPIAN BASIN

作　　者：杨勤林[1,2] 王彦春[1] 张静[2] 刘文卿[2] 王震[3] 

机构地区：[1]中国地质大学地球物理与信息技术学院,北京100083 [2]中国石油勘探开发研究院西北分院,甘肃兰州730020 [3]中国石油勘探开发研究院,北京100083

出　　处：《物探与化探》2013年第2期323-327,共5页Geophysical and Geochemical Exploration

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(2008E-1606)

摘　　要：滨里海盆地在二叠系发育巨厚盐丘,由于高速盐岩厚度的剧烈变化导致盐下地震资料成像困难、构造形态畸变等。如何消除盐丘速度的影响,恢复盐下的真实构造形态是该区油气勘探急需解决的难题。笔者通过处理解释一体化的攻关研究,在解决静校正、盐下振幅恢复等叠前保真的基础上,采用浮动基准面叠前时间偏移方法对高陡构造准确成像,通过对盐体及盐下构造的精细刻画和层速度反演建立层位—速度模型,最后利用叠前深度逆时偏移的方法对盐下构造进行准确成像和构造恢复,形成了一套针对盐下构造处理解释一体化技术,并在滨里海含盐盆地得到了应用。There are salt domes of great thickness deposited in Pre-Caspian basin.As the salt layer thickness varies dramatically,it is difficult to perform imagery for the sub-salt seismic data,and the structure features show distortions.The elimination of the salt velocity influence and the restoration of the real sub-salt structure form constitute the urgent problems in oil-gas exploration.Through the integrated study of processing and interpretation,the authors used the floating datum pre-stack time migration method to conduct imagery for high and steep structures based on pre-stack fidelity of the static correction and to make salt amplitude recovery.Finally,the pre-stack reverse-time depth migration method was used for the sub-salt structure accurate imaging and recovery.A technological series of integration of processing and interpretation for sub-salt structure was formed and applied in Pre-Caspian salt basin.

关 键 词：滨里海盆地 盐丘 盐下构造 处理解释一体化 叠前深度逆时偏移 

分 类 号：P631.4[天文地球—地质矿产勘探]