Measuring device for measuring core saturation resistivity by liquid flooding method

Abstract

The invention relates to the technical field of core saturation and resistivity joint measuring devices, and discloses a core saturation and resistivity measuring device by the aid of a fluid displacing method. The core saturation and resistivity measuring device comprises an ambient pressure barrel, a displacing electrode, an upper barrel sealing cap and a lower barrel sealing cap. A rubber sleeve is mounted inside the ambient pressure barrel, the upper end and the lower end of the rubber sleeve are respectively fixedly mounted with the upper end and the lower end of the ambient pressure barrel, an air cavity is formed between the rubber sleeve and the inner wall of the ambient pressure barrel, a radial inflating opening which is communicated with the air cavity is formed in the middle of the ambient pressure barrel, the inside of the ambient pressure barrel is communicated with the outside of the ambient pressure barrel via the radial inflating opening, and the displacing electrode is fixedly mounted in an inner cavity formed by the upper portion of the rubber sleeve and the upper portion of the ambient pressure barrel. The core saturation and resistivity measuring device has the advantages that the core saturation and resistivity measuring device is reasonable and compact in structure and convenient to use, a core can be installed and replaced conveniently and can be effectively coupled with the measuring electrode, accordingly, the fluid draining quantity of the core can be assuredly accurately metered, the core saturation and resistivity measurement accuracy is guaranteed, and contact errors due to contact resistance of the core are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of a joint measurement device for rock core saturation and resistivity, and relates to a measuring device for measuring rock core saturation resistivity by a liquid flooding method. Background technique [0002] For a long time, the core saturation resistivity measurement device has used the gas or oil displacement to measure the core saturation two-pole method to measure the core saturation resistivity. The confining pressure can be set according to the measurement requirements, but the coupling pressure cannot be set. The displacement end is coupled with the core and the stainless steel measuring electrode, and the liquid outlet is directly coupled with the core and the stainless steel electrode. Because the coupling pressure is not fixed, the coupling effect is poor, and the contact error between the core and the electrode is large. As the water saturation of the core decreases, the contact resistance of...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a device for measuring core saturation resistivity by liquid flooding method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of traditional core saturation The contact resistance measurement error of the resistivity joint measurement device is large, resulting in a large measurement error of the core resistivity and a large measurement error of the liquid.

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