基于全直径岩心二维核磁共振测量的低阻油层评价方法  

Low resistivity reservoir evaluation method based on full-diameter core 2d NMR measurement

作　　者：白莎 石玉江 李思 淑华 李新 赵建斌 刘鹏 董元媛 Sha Bai;Yujiang Shi;Si Li;Shuhua Di;Xin Li;Jianbin Zhao;Peng Liu;Yuanyuan Dong

机构地区：[1]中国石油集团测井有限公司地质研究院 [2]中国石油集团测井有限公司华北分公司

出　　处：《国外测井技术》2024年第2期32-39,2,共9页World Well Logging Technology

基　　金：中国石油集团股份公司《页岩油全直径岩心二维核磁扫描资料处理方法研究》,课题编号KT2020-10-09;中国石油集团测井有限公司《车载快速岩石物理实验室建设研究》,课题编号CPL2021-A10。

摘　　要：河套盆地临河组砂岩储层中油层类型多样,低阻油层普遍存在,油层识别难度大。本文通过室内柱塞样岩心离心状态、饱和状态测量核磁T谱,结合测井资料及油水分析,明确河套盆地临河组砂岩低阻油层主要成因;根据移动式全直径岩心核磁共振Ti一T,现场测量数据,分析不同流体组分T1-T,图谱特征,明确典型油层、低阻油层、水层孔隙流体组分分布特征规律,确定二维核磁TI-T,图谱中油水信号的分布特征;同时,根据低阻油信号在二维核磁Ti-T,图谱中的分布特征建立含油饱和度计算模型,实现低阻油层含油性定量评价;形成了基于全直径岩心二维核磁共振测量的低阻油层评价方法,该方法在河套盆地规模化应用,效果显著。There are various types of oil layers andlow resistivity oilreservoirs in Linhe Formation sandstone reservoirs in Hetao Basin,so it is difficult to identify oil reservoirs.In this paper,the main origin of low resistivity oil reservoir are determined by measuring the NMR T2 spectrum of indoor plunger sample cores under centrifugal state and saturation state,combining with logging data and oil-water analysis.Based on the field data of moving full-diameter core nuclear magnetic resonance(NMR)T1-T2,the characteristics of T1-T2 spectrum of different fluid components are analyzed,at the same time,the oil saturation calculation model is established according to the distribution characteristics of the low resistivity oil signal in the two-dimensional nuclear magnetic T1-T2 spectrum,the quantitative evaluation of oil-bearing capacity of low-resistivity reservoir is realized,and a method of low-resistivity reservoir evaluation based on full-diameter core two-dimensional nuclear magnetic resonance measurement is formed and This method has been applied in the HETAO Basin on a large scale with remarkable effect.

关 键 词：全直径岩心 二维核磁共振 低阻油层 流体识别 含油性定量评价 

分 类 号：TE3[石油与天然气工程—油气田开发工程]