频谱分解技术在岩相建模中的应用  

Application of spectrum decomposition technique in lithofacies modeling

作　　者：胡水清[1] 韩大匡[1] 刘文岭[1] 王玉学[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《大庆石油学院学报》2008年第3期1-4,共4页Journal of Daqing Petroleum Institute

基　　金：国家"973"重点基础研究发展计划项目(2005cb221306)

摘　　要：基于河流相储层的地质特征,通过频谱分解方法,提出利用井震(频谱分解结果)联合绘制的各地质小层砂泥岩平面分布图为约束,建立高精度储层岩相模型.实际区块应用表明,谱分解技术可以预测具有一定规模的河道砂体的分布,同时井震联合建模方法能够利用地震资料与井资料分别在平面和纵向上具有高密度采样的特点,对井间储层的分布做出准确、细致的描述和预测,可以降低建模过程砂岩骨架模型的不确定性.依据该方法在低井控条件下建立的高精度储层地质模型,其井上砂层预测符合率为80%.Based on the geologic characteristic of fluvial facies reservoir and the research on the application of spectrum decomposition technique, this paper presents a method for high-precision lithofacies modeling constrained by sublayer sand and shale distribution map described by combining logging and spectrum decomposition result. Case study shows that spectrum decomposition technique can be used to effectively predict the distribution of a certain scale channel sands. Besides, logging and seismic data unit reservoir modeling can fully utilize the high density horizontal sampling of the seismic data and high vertical resolution of the logging data to accurately predict the interwell reservoir distribution and reduce the uncertainty of sand skeleton model. Based on this method, a high precision reservoir geological modeling is built in low well control area, and the prediction precision of sand bodies come up to 80%.

关 键 词：频谱分解 河道砂体 储层地质建模 砂岩骨架模型 储层预测 

分 类 号：TE111.3[石油与天然气工程—油气勘探]