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LOW-MIDDLE POROUS RESERVOIR PROPERTIES OF YANCHANG FORMATION IN JING'AN OILFIELD

Bian Rui

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Abstract

The drilling core analysis data and well logging data of Jing'an oilfield are used to analyze the factors affecting low middle porous sandstone permeability. It is found that the oil effective permeability of low middle porous sandstone is related with the porosity, water saturation and shale volume of formation. The multivariate linear regression method is applid to establish the relation among effective permeability of oil and porosity, standard resistivity, standard spontaneous potential of formation. The effective oil permeability calculated by using the equation is consistent with the core analysis data. The method for calculating the reservoir permeability by using well logging data is presented. The relation of water saturation with porosity and resistivity of reservoir is also given.

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What this paper is about

The drilling core analysis data and well logging data of Jing'an oilfield are used to analyze the factors affecting low middle porous sandstone permeability. It is found that the oil effective permeability of low middle porous sandstone is related with the porosity, water saturation and shale volume of formation. The multivariate linear regression method is applid to establish the relation among effective permeability of oil and porosity, standard resistivity, standard spontaneous potential of formation. The effective oil permeability calculated by using the equation is consistent with the core analysis data. The method for calculating the reservoir permeability by using well logging data is presented. The relation of water saturation with porosity and resistivity of reservoir is also given.

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Available abstract

The drilling core analysis data and well logging data of Jing'an oilfield are used to analyze the factors affecting low middle porous sandstone permeability. It is found that the oil effective permeability of low middle porous sandstone is related with the porosity, water saturation and shale volume of formation. The multivariate linear regression method is applid to establish the relation among effective permeability of oil and porosity, standard resistivity, standard spontaneous potential of formation. The effective oil permeability calculated by using the equation is consistent with the core analysis data. The method for calculating the reservoir permeability by using well logging data is presented. The relation of water saturation with porosity and resistivity of reservoir is also given.

Key concepts: Porosity, Permeability (electromagnetism), Geology, Water saturation, Saturation (graph theory), Petroleum engineering, Oil shale, Well logging

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