Correlation between relative permeability, capillary pressure and resistivity index

Ma Dong; Zhang Kun; Hu Juncheng; Li Hehui; Ma Long; Tang Tang

doi:10.11743/ogg20190119

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Correlation between relative permeability, capillary pressure and resistivity index
Vol. 40, Issue 1, Pages: 190-195(2019)
Online First：28 February 2019，

Published：2019
DOI： 10.11743/ogg20190119
稿件说明：

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DOI：

Ma Dong, Zhang Kun, Hu Juncheng, et al. Correlation between relative permeability, capillary pressure and resistivity index[J]. 2019, 40(1): 190-195. DOI： 10.11743/ogg20190119.

摘要

毛管压力、相对渗透率和电阻率指数是描述储集层物性及表征储集层中多相渗流特征的重要参数。由于现行的毛管压力和相对渗透率测试方法存在着耗时长、仪器精度要求高和实验条件易受到制约等诸多问题，因此获取毛管压力和相对渗透率数据具有一定难度。基于毛细管模型和阿尔奇公式，研究了毛管压力、相对渗透率和电阻率指数三者之间的相关性，建立了三者之间的转换模型。通过岩电实验对转换模型的准确性进行了验证。结果表明，通过转换模型计算得到的毛管压力和相对渗透率数据和实验实测数据非常接近。通过本文的方法，能够通过电阻率数据计算毛管压力和相对渗透率，可以使得毛管压力和相对渗透率数据的获取更加便捷和多元化。

Abstract

Parameters such as capillary pressure

relative permeability and resistivity index are important to describe reservoir properties and multiphase fluid flow characteristics in reservoirs.However

the relative permeability and capillary pressure could not be easily measured through experiments which are often time-consuming

demanding in instrument precision

and restricted by subjective conditions.The study discussed the correlation amongcapillary pressure

relative permeability and resistivity index based on the capillary tube model and Archie equation

and in turn built a transformation model among the three parameters.Besides

the accuracy of the transformation model was verified by rock-electrical property experiment.The results show that the relative permeability and the capillary pressure calculated with the transformation model are very close to that measured through in-situ experiments.The method proposed in this study can effectively calculate the relative permeability and capillary pressure with resistivity data

making it easier to figure out the two parameters.