Permeability Prediction for Carbonate Rocks using a Modified Flow Zone Indicator Method

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-02-28 DOI:10.14500/aro.11314

Ahmed J. Mahmood, M. A. Jubair

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引用次数: 0

Abstract

Carbonate reservoir rocks are usually heterogeneous, so it is not an easy task to establish a relation between porosity and permeability in these types of reservoir rocks. First, Kozney and Kozney-carmen formulas were used to establish these relations. Later, the flow zone indicator (FZI) method was introduced, which was widely used to find such a relation since it shows better results than the two former methods. In this work, the classical FZI method and a modified form of the FZI method are utilized to identify the hydraulic flow units and rock quality index to predict permeability. In this FZI method, the cementation factor (m) was introduced in calculating the value of FZI. The data collected from core analysis of the cored intervals in the Tanuma and Khasib formations were used as a database for this work. The classical and the modified FZI methods were applied using the database to predict core permeability. The value of the cementation factor was tuned to get a better match between the predicted permeability resulting from applying the modified method and the measured permeability values. Results show that the correlation coefficients resulting from applying the modified FZI method are closer to unity compared with that resulting from the classical FZI method. Cementation factor (m) of m = 3 for Tanuma formation and m = 3 for Khasib formation are the best values used with the modified FZI method. The modified FZI method shows a regression factor of 0.9986 for Tanuma and 0.9942 for Khasib formation.

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使用改良流区指示器法预测碳酸盐岩的渗透性

碳酸盐岩储层岩石通常是异质的，因此在这类储层岩石中建立孔隙度和渗透率之间的关系并非易事。最初，人们使用 Kozney 和 Kozney-carmen 公式来建立这些关系。后来又引入了流区指示器（FZI）方法，由于该方法比前两种方法显示出更好的结果，因此被广泛用于寻找这种关系。本研究利用经典的 FZI 方法和 FZI 方法的一种改进形式来确定水力流动单元和岩石质量指标，从而预测渗透率。这种 FZI 方法在计算 FZI 值时引入了胶结系数（m）。在这项工作中，使用了从 Tanuma 和 Khasib 地层岩心分析中收集的数据作为数据库。利用数据库应用经典和修正的 FZI 方法预测岩心渗透率。对胶结系数的值进行了调整，以使修正方法预测的渗透率与测量的渗透率值更加匹配。结果表明，与经典 FZI 方法相比，采用修正 FZI 方法得出的相关系数更接近于统一。改良 FZI 方法的最佳固结系数（m）为：Tanuma 地层 m = 3，Khasib 地层 m = 3。修正的 FZI 方法显示，Tanuma 油层的回归系数为 0.9986，Khasib 油层的回归系数为 0.9942。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.