核磁共振测井法估算砂砾岩储层束缚水饱和度模型构建  

Method to Calculate the Irreducible Water Saturation(S_(wirr))Using Nuclear Magnetic Resonance Logging Data in Glutenite Reservoirs

作　　者：胡婷婷[1] 贾春明[1] 余海涛[1] 李静[1] 向英杰 HU Ting-ting;JIA Chun-ming;YU Hai-tao;LI Jing;XIANG Ying-jie(Research Institute of Geophysical,Research Institute of Exploration and Development,Petro China Xingjiang Oilfield Company,Urumqi 830013,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院地球物理研究所,乌鲁木齐830013

出　　处：《核电子学与探测技术》2020年第6期897-901,共5页Nuclear Electronics & Detection Technology

基　　金：中央高校基本科研业务费(2-9-2013-036)资助。

摘　　要：通过对经典的SDR和Timur-Coates渗透率评价模型进行综合分析,推导出一种利用核磁共振测井资料计算束缚水饱和度的理论模型。利用取自于准噶尔盆地砂砾岩储层21块代表性岩心的核磁共振实验结果,标定了束缚水饱和度计算模型中的系数。利用该模型对研究区实际测量的核磁共振测井资料进行了处理,计算出连续的束缚水饱和度曲线。计算的束缚水饱和度与岩心核磁共振实验结果的对比表明,二者之间的绝对误差低于5%,满足储量规范的基本要求,验证了模型的可靠性。Based on the comprehensive analysis of the classic Schlumberger Doll Research center(SDR)and Timur-Coates permeability prediction models,a theoretical relationship that used to calculate irreducible water saturation(S_(wirr))from nuclear magnetic resonance(NMR)logging data is proposed.The involved model parameters are calibrated by using the NMR experimental measurements of 21 typical core samples.These core samples were recovered from the glutenite reservoirs in the Jiamuhe Formation,Chepai 18 region,northwestern Junggar Basin.By applying this model to the target formations to process the field NMR logging,the irreducible water saturations are consecutively predicted.Comparison of the predicted with the core-derived results illustrates that the absolute errors between them are lower than 5.0%.The absolute errors match with the reserve specification very well,and this verifies the reliability of the proposed model.

关 键 词：核磁共振测井法 束缚水饱和度 砂砾岩储层 T2几何均值 核磁孔隙度 

分 类 号：P613.813[天文地球—矿床学]