物探化探计算技术2023，Vol.45Issue(6)：698-706,9.DOI:10.3969/j.issn.1001-1749.2023.06.02
泥页岩储层孔隙度测量方法分析与评价
Comparison of measurement methods for porosity of the shale reservoir
屈翠侠 1刘永河 2宋宏业 1魏玉梅 1刘竹杰 2徐锦锋1
作者信息
- 1. 中国石油集团 测井有限公司天津分公司,天津 300280
- 2. 中国石油股份有限公司 大港油田分公司第四采油厂(滩海开发公司),天津 300280
- 折叠
摘要
Abstract
The shale is an unconventional reservoir with porosity generally less than 10%and permeability generally less than 1mD.This feature of low porosity and low permeability makes it difficult to accurately obtain the porosity value by con-ventional experimental methods and logging interpretation methods.In this paper,the shale samples of the Ek2 in Cangdong sag are selected to test their porosity values separately by mercury intrusion,gas,liquid,and nuclear magnetic resonance(NMR)methods.The porosity values of the NMR experiment and NMR logging are compared.The experimental results show that NMR technology is a relatively suitable method for obtaining shale porosity,and the high-precision NMR instruments can measure more comprehensive shale porosity values under the condition of selecting a smaller echo interval(TE=0.1 ms).However,in the shale section with high organic matter content(TOC≥9%),the signal-to-noise ratio of NMR logging shows a certain correlation.Low signal-to-noise ratio(SNR)may cause the high porosity value obtained by NMR logging.Therefore,in the actual logging evaluation process,the influence of SNR should be considered.关键词
泥页岩/孔隙度/核磁共振/岩心实验/测井Key words
the shale/porosity/nuclear magnetic resonance(NMR)/core experiment/logging引用本文复制引用
屈翠侠,刘永河,宋宏业,魏玉梅,刘竹杰,徐锦锋..泥页岩储层孔隙度测量方法分析与评价[J].物探化探计算技术,2023,45(6):698-706,9.
