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Modeling the Dielectric Constant of Earth-Formation Rocks: A Sandstone Memory of Immiscible-Saturation History

机译：地球岩石介电常数的模拟：不混溶 - 饱和历史的砂岩记忆

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Electromagnetic (EM) probings of the earth are contributing to the economic exploration and production of geoenergy resources (e.g., gas, oil and geothermal reservoirs). There are two analytical effects included in one type of EM probing: First, the earth dielectric properties around a borehold are inverted from measurable responses downhole. Second, the gas/oil production parameters are estimated from the inverted dielectric properties of reservoir rocks. As a part of the second effort, this paper gives a modeling procedure with examples on the dielectric constants of three-component rocks made of clean sandstones saturated by oil and water. The present modeling procedure employs two of the theoretical models reported recently by Tsang and Kong (J. Appl. Phys. 51(7), July 1980; pp 3465-3485). Basically the models are for a two-component mixture: a base substance with spherical pores and a saturating substance inside the pores. For applications to three-component rocks the saturating mixture of oil and water is treated here as another two-component mixture. Measured data are based on the laboratory measurements on clay-free sandstones (collected from different sites) as reported by Poley, Nooteboom and deWaal (The Log Analyst, May-June, 1978; pp 8-30). 2 figures. (ERA citation 08:040164)

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