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Effective porosity

About: Effective porosity is a research topic. Over the lifetime, 1199 publications have been published within this topic receiving 26511 citations.


Papers
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01 Jan 2012
TL;DR: In this article, a computerized well logging analysis for Raha Formation, using eight wells scattered in Ras Budran Field in the Gulf of Suez, was done utilizing different types of open-hole well logs such as: gamma-ray, density, and resistivity.
Abstract: The present study deals with the computerized well logging analysis for Raha Formation, using eight wells scattered in Ras Budran Field in the Gulf of Suez. This study was done utilizing different types of open-hole well logs such as: gamma-ray, density, and resistivity. The considered wells don't produce from the Raha Formation although it has suitable amount of oil with good values of the different petrophysical parameters. This is related to the absent of effective porosity which is considered in this paper through the discrimination of effective from ineffective porosity by using resistivity logs. These logs are considered as the most useful and helpful tool in detecting high effective porosity zones.

1 citations

Journal ArticleDOI
Shuyu Wu1, Jun Liu, Zhu Zhu, Zhiqiang Wu, Guolin Xiao 
TL;DR: In this paper, the core data spectral processing method of NMR taking the Eastern Depression of the North Yellow Sea as a case was discussed for core data processing of the NMR.
Abstract: NMR logging technology,due to its accurate measurement result and the advantage of detecting lithological texture without damage,is increasingly and extensively applied in oil exploration and development.In this paper,we focused on the core data spectral processing method of NMR taking the Eastern Depression of the North Yellow Sea as a case.Pretreatment,spectrum analysis and formation parameter method and process were discussed for the core data processing of NMR.Using the optimal solution spectrum method,we obtained the data of effective porosity,movable fluid porosity,bound water porosity and permeability of formation parameters.

1 citations

Book ChapterDOI
01 Jan 2016
TL;DR: In this article, several correlations relating the formation resistivity factor to several petrophysical parameters, including porosity, tortuosity, cementation factor m, water saturation, and permeability, are discussed.
Abstract: Sedimentary formations are capable of transmitting an electric current only by means of their interstitial and adsorbed water content. They would be nonconductive if they were entirely dry. A rock that contains oil and/or gas will have a higher resistivity to electric current than the same rock when it is completely saturated with formation water. The greater the connate water saturation is, the lower the formation resistivity is. This relationship to saturation makes the formation resistivity factor an excellent parameter for the detection of hydrocarbon zones. Several correlations relating the formation resistivity factor to: salinity of formation water, effective porosity, pore geometry, formation stress, temperature, interstitial fluids, and composition of rock, are discussed in this chapter. Methods for determining the formation resistivity are discussed, including: Archie equation, chemical analysis, spontaneous potential (SP) curve, and shale properties. Statistical correlations of the formation resistivity factor to several petrophysical parameters, including porosity, tortuosity, cementation factor m, water saturation, and permeability, are discussed in this chapter. Several models to estimate water saturation and flow units in shaly reservoirs are presented. Most concepts are illustrated with numerical examples. Many exercises are included at the end of the chapter.

1 citations

Proceedings ArticleDOI
29 Oct 2021
TL;DR: In this paper, the results of an experiment to determine the residual saturation of drilling fluid filtrate in the pore space of a core sample were presented, which can be useful in studying the mechanism of reducing the formation permeability for oil due to the penetration of the water phase.
Abstract: The article presents the results of an experiment to determine the residual saturation of drilling fluid filtrate in the pore space of a core sample. The presence of residual filtrate saturation of the pore space of the rock reduces its effective porosity and, consequently, oil permeability. The results of such studies can be useful in studying the mechanism of reducing the formation permeability for oil due to the penetration of the water phase. Optimization of the parameters of the drilling fluid and its filtrate can help reduce the negative impact on the formation during drilling.

1 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20236
202232
202162
202065
201971
201847