摘要
储层流体性质识别技术的主要研究内容是确定油水关系划分标准。由于井下地质构造的复杂性和测井参数的模糊性,存在着由岩性、物性、电性及地层水矿化度等因素引起的含油性的变化,而传统的双参数油水解释标准往往对这类储层识别精度不够。数理统计方法是通过对一些样本的诸多已知性质进行分析提取、建立样本分类规则来实现对未分类样本的归类,尝试将该方法应用到流体性质识别中。首先利用试采井中能反映储层含油性的岩性、物性、电性特征的测井参数作为已经数据,进行聚类分析,求取各特征参数的判别向量,建立多参数油水解释图版;然后通过判别分析技术,建立油层、油水同层、水层的判别函数模型,最终形成了一套储层流体性质的定性和定量识别方法。该技术应用在目标区块储层评价中,通过17口井38层试采资料验证,符合率提高了10.5个百分点,取得了良好的应用效果。
The main research content of the identification technology of reservoir fluid property is to determine the classification standard of oil-water relationship.Due to the complexity of underground geological structure and the modularity of logging parameters,changes in oil-bearing properties are often triggered by lithology,physical properties,electrical properties and formation water salinity,but the traditional two-parameter oil-water interpretation standard is often not accurate enough for this kind of reservoir identification.The method of mathematical statistics can classify the unclassified samples by analyzing and extracting the known properties of some samples and establishing the classification rules of the samples.Using the logging parameters to reflect the lithology,physical property and electrical property of the oil-bearing reservoir in the test-production wells as the existing data,the cluster analysis is carried out to obtain the discriminant vectors of each characteristic parameter,and the multi-parameter oil-water interpretation chart is established.A set of qualitative and quantitative identification methods of reservoir fluid properties are finally formed by establishing the discriminant function model of oil layer,oil-water layer and water layer through discriminant analysis.The technique is applied to reservoir evaluation in the target block,and has been verified by 38 layers of 17 wells.The coincidence rate has been increased by 10.5 percent,and good application effect has been achieved.
作者
魏玉梅
刘文钰
刘俊东
刘永河
窦如胜
王顺利
孟姝婳
Wei Yumei;Liu Wenyu;Liu Jundong;Liu Yonghe;Dou Rusheng;Wang Shunli;Meng Shuhua(Tianjin Branch,China Petroleum Logging Co.Ltd.,Tianjin 300280,China;The Fourth Oil Production Plant(Tanhai Development Company),China National Petroleum Corporation Dagang Oilfield Branch,Tianjin 300280,China;The First Logging Branch,Bohai Drilling Engineering Co.Ltd.,Tianjin 300280,China)
出处
《工程地球物理学报》
2021年第6期822-827,共6页
Chinese Journal of Engineering Geophysics
基金
中国石油天然气股份有限公司重大科技专项(编号:2018E-11-05)。
关键词
数理统计
判别分析
多参数图版
函数模型
流体性质识别
mathematical statistics
discriminant analysis
multi-parameter chart
function model
fluid property identification
