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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0925586 (1986-10-31) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 274 인용 특허 : 0 |
An in-situ method of determining the pore size distribution, capillary pressure curve, and permeability of a formation using induced polarization logging measurements. The induced polarization (IP) voltage decay curve is measured opposite the formation of interest and the voltage decay curve is deco
An in-situ method of determining the pore size distribution, capillary pressure curve, and permeability of a formation using induced polarization logging measurements. The induced polarization (IP) voltage decay curve is measured opposite the formation of interest and the voltage decay curve is decomposed into a series of relaxation times related to the pore size distribution. The capillary pressure curve and the permeability are approximated from the pore size distribution. The measurements can also be made in the frequency domain using various frequencies to obtain the variation in phase shift with frequency. The variation in phase shift with frequency can be correlated with previous core measurements to obtain the pore size distribution, capillary pressure curve and formation permeability.
A method for the in-situ determination of permeability of a formation, comprising the steps of: logging the formation of interest with a time dependent induced polarization logging tool to produce transient induced polarization measurements; converting the transient induced polarization measurements
A method for the in-situ determination of permeability of a formation, comprising the steps of: logging the formation of interest with a time dependent induced polarization logging tool to produce transient induced polarization measurements; converting the transient induced polarization measurements obtained by the logging tool to an induced polarization formation response function; determining the pore size distribution from the induced polarization response function; and determining the permeability from the pore size distribution.
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