测井资料定量识别河流储层建筑结构要素  

Quantitative discrimination of architectural elements of fuvial reservoir using well log data

作　　者：冯建伟[1] 戴俊生[1] 冀国胜[1] 林博[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东东营257061

出　　处：《中国石油大学学报（自然科学版）》2007年第5期21-27,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金："十五"国家科技攻关项目(2003BA613A-02)

摘　　要：针对高含水开发阶段地下河流相储层内部建筑结构分析难度大、非均质性突出的问题,在岩心、露头、钻井、测井资料分析的基础上,以孤岛油田中一区馆(5+6)辫状河储层为例,运用M iall结构要素分析法,对储层建筑结构要素类型进行了划分,并从测井曲线提取反映结构要素的多个特征参数,进行主成分分析,建立结构要素模糊识别模型,最终编成软件,进行全区实际资料处理。结果表明,目的储层可划分为6级层次界面、11种岩石相类型、4种建筑结构要素,其中4级界面限定的成因砂体为研究的基本单位。该软件能准确识别地下储层结构要素类型,处理速度快,实用性强。采用该软件对储层内部纵、横方向延伸进行识别,可有效地追索建筑结构的横向变化、砂体的叠置迁移,从而预测河流沉积砂体的复杂分布规律和储层非均质性,指导剩余油开发。With oilfield entering late development stage, analysis of inner architectural structure of underground fluvial reservoir becomes more difficult, and heterogeneity becomes more serious. To discuss the problems, based on cores, outcrop, drilling and well log data, architectural structure of Guan（5 ＋ 6） sand sets in Zhong-1 district of Gudao Oilfield was analyzed according to Miall＇s classification. Then characteristic parameters were extracted by using well log data, and principal component was analyzed to establish quantitative fuzzy diagnosis model. Finally, a set of software was programmed. The results show that the bounding surfaces of study reservoir can be divided into six grades, lithofacies into eleven kinds and architectural elements into four kinds, among which the architectural element restricted by the fourth bounding surface is the most primary unit. By using the software, the architectural elements of underground reservoir can be discriminated effectively. The lateral and vertical extend of reservoir is discriminated, transformation of architectural structure and overlap made of sand body are traced effectively, and thus complicated distribution law and heterogeneity degree of fluvial reservoir are predicted to instruct development operation of remaining oil.

关 键 词：河流储层 测井资料 建筑结构要素 模糊识别模型 

分 类 号：P588.2[天文地球—岩石学] P512.2[天文地球—地质学]