基于反褶积广义S变换的双相介质理论油水识别法在渤海S油田馆陶组的应用  

The application of seismic oil-water identification method to Guantao Formation of Bohai S oil field

作　　者：韦红 白清云 张鹏志 甄宗玉 WEI Hong;BAI Qing-Yun;ZHANG Peng-Zhi;ZHEN Zong-Yu(China National Offshore Oil Corporation(CNOOC)Limited Tianjin Branch,Tianjin 300450,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300450

出　　处：《物探与化探》2021年第6期1394-1401,共8页Geophysical and Geochemical Exploration

基　　金：“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”项目(2016ZX05058-001)。

摘　　要：受限于地震资料分辨率较低,渤海S油田馆陶组的复合叠置砂体中的单砂体顶底识别较困难;且在时—空域里,地震反射特征相似的砂层组出现截然不同的流体类型,油水关系非常复杂。为此,本文首先开展了反褶积广义S变换的时频分析,参照已钻井的地震反射特征,优选低频、高频属性体;其次进行储层顶、底的准确识别;利用双相介质理论进行油、水的频谱特征差异分析。分析表明,油、水层在频率域的地震响应有较明显的特征,频率类的属性对地震波的高频衰减较敏感;通过优选该油田主力油层的低频、高频属性体数据及储层顶、底的频谱衰减差异的平面数据,共同构建一个新的流体识别因子,进行油水识别,并取得较好的效果,助力剩余10余口开发井的布署和实施。Restricted by the low resolution of seismic data,the identification of the top and bottom of a single sand body is difficult in the composite superposed sand bodies of the Guantao Formation in the Bohai S oil field.Moreover,in the time-space domain,sandstones with similar seismic reflection characteristics have very different fluid types,and the oil-water relationship is very complicated.In view of such a situation,based on the two-phase medium theory and the theory of viscous dispersion wave equation,the authors first carried out the time-frequency analysis of the generalized S transform,and selected the low-frequency and high-frequency attribute bodies with reference to the seismic reflection characteristics of the drilling well.Secondly,the top and bottom of the reservoir were accurately identified.Then the analysis of the difference of the spectrum characteristics of oil and water was conducted.The result shows that the seismic responses of the oil and water layers in the frequency domain have obvious characteristics,and the frequency-type attributes are more sensitive to the high-frequency attenuation of seismic waves.By optimizing the low-frequency and high-frequency attribute volume data of the main oil layer of the oil field and the plane data of the spectral attenuation difference between the top and bottom of the reservoir,a new fluid identification factor was jointly constructed to identify oil and water and achieved better results to help the remaining deployment and implementation of more than 10 development wells.

关 键 词：油水识别 频谱 地震响应 双相介质 黏滞弥散 油气地质工程 

分 类 号：P631.4[天文地球—地质矿产勘探]