PORE-SIZE DISTRIBUTIONS FROM NMR SPIN-LATTICE RELAXATION DATA

被引：19

作者：

DAVIES, S

PACKER, KJ

ROBERTS, DR

ZELAYA, FO

机构：

来源：

MAGNETIC RESONANCE IMAGING | 1991年 / 9卷 / 05期

关键词：

D O I：

10.1016/0730-725X(91)90357-R

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：

A set of 12 reservoir core samples has been studied by proton spin-lattice relaxation measurements. Pore-size distributions for these samples have been obtained using the isolated sphere model. The model is based upon the theory of Brownstein and Tarr for relaxation of a fluid within a pore. Measurements of the initial slope of the relaxation curves did not prove an effective means of determining the value of the surface relaxation strength for input to the model, so the effect of varying surface relaxation strength was investigated via a grid search. The study shows that, with the spherical model, a single value of the surface relaxation strength is not appropriate to describe the relaxation behaviour of all the samples. Further work is in progress to determine whether the identified variation in surface relaxation strength is genuine, or an artefact of the simple model of the rock structure.

引用

页码：681 / 685

页数：5

共 6 条

[1]

Timur, Pulsed Nuclear Magnetic Resonance Studies of Porosity, Movable Fluid, and Permeability of Sandstones, Journal of Petroleum Technology, 21, pp. 775-786, (1969)

[2]

Brownstein, Tarr, Importance of classical diffusion in NMR studies of water in biological cells, Phys. Rev. A., 19, pp. 2446-2453, (1979)

[3]

Davies, Packer, Pore-size distributions from nuclear magnetic resonance spin-lattice relaxation measurements of fluid-saturated porous solids. I. Theory and simulation, J. Appl. Phys., 67, pp. 3163-3170, (1990)

[4]

Davies, Kalam, Packer, Zelaya, Poresize distributions from nuclear magnetic resonance spinlattice relaxation measurements of fluid-saturated porous solids. II. Applications to reservoir core samples, J. Appl. Phys., 67, pp. 3171-3176, (1990)

[5]

Bhattacharja, D'Orazio, Halperin, Tarczon, Magnetic resonance analysis of porous media, Molecular Dynamics in Restricted Geometries, pp. 311-350, (1989)

[6]

Metropolis, Rosenbluth, Rosenbluth, Teller, Teller, Equation of State Calculations by Fast Computing Machines, The Journal of Chemical Physics, 21, pp. 1081-1092, (1953)

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