Low-field NMR determinations of the properties of heavy oils and water-in-oil emulsions

被引：44

作者：

LaTorraca, GA ^{[1
]}

Dunn, KJ ^{[1
]}

Webber, PR ^{[1
]}

Carlson, RM ^{[1
]}

机构：

[1] Chevron Petr Technol Co, La Habra, CA 90631 USA

来源：

MAGNETIC RESONANCE IMAGING | 1998年 / 16卷 / 5-6期

关键词：

nuclear magnetic resonance relaxation; oil viscosity; nuclear magnetic resonance well logging;

D O I：

10.1016/S0730-725X(98)00030-7

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Low-field (<50 mT) nuclear magnetic resonance (NMR) well-logging measurements are beginning to be used to obtain estimates of oil viscosity in situ. To build an interpretive capability, we made laboratory T-1 and T-2 relaxation measurements on a suite of high-density, high-viscosity crude oils. These measurements were also used to estimate oil viscocity and water fraction from T-1 and T-2 measurements on stable, water-in-oil emulsions. High-density, high-viscosity oils have components that relax faster than can be measured by nuclear magnetic resonance logging tools, This requires corrections to T-2 logging measurements for accurate estimates of oil saturation and porosity. (C) 1998 Elsevier Science Inc.

引用

页码：659 / 662

页数：4