Pore size distribution from NMR and image based methods: A comparative study

被引：36

作者：

Benavides, Francisco ^{[1
]}

Leiderman, Ricardo ^{[1
]}

Souza, Andre ^{[2
]}

Carneiro, Giovanna ^{[2
]}

de Vasconcellos Azeredo, Rodrigo Bagueira ^{[3
]}

机构：

[1] Fluminense Fed Univ, Comp Sci Dept, Av Gal Milton Tavares de Souza S-NO, BR-24210346 Niteroi, RJ, Brazil

[2] Schlumberger Brazil Technol Integrat Ctr, Av Rep Chile 330,Oeste,18 Ander, BR-20031170 Rio De Janeiro, RJ, Brazil

[3] Fluminense Fed Univ, Inst Chem, BR-24020141 Niteroi, RJ, Brazil

来源：

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING | 2020年 / 184卷

关键词：

Surface relaxivity; Nuclear magnetic ressonance; Digital petrophysics; Random walk; Pore size distribution; SURFACE RELAXIVITY; ROBUST DETERMINATION; SPACE MORPHOLOGY; DIFFUSION; RELAXATION; ALGORITHM; MICRO;

D O I：

10.1016/j.petrol.2019.106321

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In a previous work, we showed how to obtain the surface relaxivity as a function of pore size. In the present work, we take a step further and introduce a formulation that uses this surface relaxivity function to convert a T-2 distribution into a pore size distribution. We then compare the pore size distribution obtained with the aid of this formulation with the pore size distribution obtained with the aid of other image and non-image-based methodologies for three case studies. Particularly, we compare the pore size distribution obtained with the aid of the introduced formulation with the pore size distribution obtained from the uniform surface relaxivity hypothesis, using the uniform value obtained experimentally. The comparisons indicate that, at least for the studied cases, the use of the surface relaxivity function instead of the uniform value leads to a more accurate pore size distribution, indicating thus that the varying surface relaxivity and the formulation introduced here have the potential to improve the estimate of all other related subsequent petrophysical deliverables.

引用

页数：11

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