基于核磁共振T2图谱测量岩心裂缝孔隙度  

Estimation of Core Fracture Porosity by T_2-NMR Spectroscopy

作　　者：宋南希[1] 陈宝新 王翠丽 陈东 罗明高[1] 蒲柏宇 Song Nanxi;Chen Baoxin;Wang Cuili;Chen Dong;Luo Minggao;Pubaiyu(College of Geosciences and technology,Southwest Petroleum University,Sichuan,Chengdu 610500,China)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]中石油塔里木分公司勘探开发研究院,新疆巴音郭楞841000

出　　处：《石化技术》2017年第2期127-127,共1页Petrochemical Industry Technology

摘　　要：核磁共振具有测试时间少,对岩样无损害,无副作用等优点,逐渐在测量储层孔隙结构特征中得到广泛应用。通过核磁共振分析系统AniMR-150,对15个普通岩心以及6个数字岩心进行不同回波间隔的多次测量,可以得到以下结论:普通孔隙型岩心的T_2谱具有一个波峰,分布于T_2截止线的左右,峰值不高,幅度比较小,此波峰代表了岩心的小孔隙特征,说明岩心孔隙度较小,岩心孔隙不发育;具有小孔隙与裂缝的特征的孔缝型岩心T_2谱呈双峰分布,且两峰不连续,右边波峰比前面更大,分布范围较大,左边波峰代表小孔隙,右边代表裂缝。Nuclear magnetic resonance(NMR)has many advantages,such as little testing time,no harm to rock specimen.The multiple echoes of15common cores and6digital cores were measured by the AniME-150system.The following conclusions canbe drawn:The T2spectrum of ordinary porosity core has a peak which is distributed around T2cut-off line,the peak value is nothigh and the amplitude is small.This peak represents the small pore feature of the core,which shows that the porosity of the core issmall and the core pore is not developed;And the two peaks are discontinuous.

关 键 词：核磁共振 T2图谱 孔隙体积 

分 类 号：P618.13[天文地球—矿床学]