Evaluation of Pore Geometry and Saturation Degree Influence to Electrical Resistivity Dispersion: A Potential Application to Extract Porosity

Surface conductivity is indicated by electrical resistivity dispersion in low water saturation. When evaluating surface conductivity, the pore geometry should be considered because a large structure is easier to saturate rather than a small structure. This work underlines the evaluation of pore geom...

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Bibliographic Details
Published in:Petroleum science and technology 2013-03, Vol.31 (5), p.516-529
Main Authors: Khairy, H., Harith, Z. T.
Format: Article
Language:English
Subjects:
Applied sciences
Conductivity
Crude oil, natural gas and petroleum products
Dispersions
Electric potential
electrical double layer
Electrical resistivity
Energy
Exact sciences and technology
Fuels
interfacial conductivity
partial water saturation
Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts
pore geometry
Porosity
Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units
Resistivity
Rock
Saturation
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Summary:Surface conductivity is indicated by electrical resistivity dispersion in low water saturation. When evaluating surface conductivity, the pore geometry should be considered because a large structure is easier to saturate rather than a small structure. This work underlines the evaluation of pore geometry distribution and saturation degree of reservoir rock and its effect to electrical dispersion. It is found that pore radius distribution and porosity has a good correlation with electrical dispersion. The large structure reflects more electrical dispersion compare to the small one. In high water salinity, surface conductivity occurs at low water saturation degree and vanishes with more water saturation addition. The potential indicator to estimate rock porosity derived from electrical dispersion has been verified in this article.
ISSN:1091-6466
1532-2459
DOI:10.1080/10916466.2010.516293