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Device and method for rapidly and accurately measuring seepage law of gas in compact rock core

A technology for accurate determination of tight rocks, applied in the field of exploration and development of tight gas reservoirs, can solve the problems of reduced accuracy of analysis results, and achieve the effect of simple operation

Active Publication Date: 2020-11-13
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

The research results show that using conventional gas reservoir analysis methods to simulate the production performance of tight gas reservoirs will greatly reduce the accuracy of the analysis results

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  • Device and method for rapidly and accurately measuring seepage law of gas in compact rock core
  • Device and method for rapidly and accurately measuring seepage law of gas in compact rock core
  • Device and method for rapidly and accurately measuring seepage law of gas in compact rock core

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] The purpose of the present invention is to provide a fast and accurate measuring device and method for the seepage law of gas in tight rock cores, which is used to quickly and accurately measure the apparent permeability of tight rock cores, the Biot coefficient, and the gas permeability when gas seeps in tight rock cores. Klinkenberg coefficient.

[0045] In order to make the above objects, features and advantages of the present invention...

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Abstract

The invention discloses a device and a method for rapidly and accurately measuring a seepage law of gas in a compact rock core. The device comprises a triaxial rock core holder, a pipeline system, a seepage system, a pressure system, a valve system and a data acquisition and processing system. The method comprises the following steps that the apparent permeability of a compact rock core is measured; by keeping the axial displacement of the compact rock core unchanged, the axial pressure and confining pressure applied to the compact rock core are adjusted, and the Biot coefficient of the compact rock core is measured; according to the measured Biot coefficient, the effective stress of the compact rock core is kept unchanged, and the Klinkenberg coefficient of gas seepage in the compact rockcore is measured. The method can accurately and quickly determine the seepage law of the gas in the compact rock core, are simple to operate, and have important significance for exploration and development of compact gas reservoirs.

Description

technical field [0001] The invention relates to the technical field of exploration and development of tight gas reservoirs, in particular to a device and method for quickly and accurately measuring the seepage law of gas in tight rock cores. Background technique [0002] Among the proven natural gas reservoirs in my country, the gas storage capacity of tight gas reservoirs accounts for a considerable proportion of the total gas storage capacity, and has broad development prospects. The research results show that using conventional gas reservoir analysis methods to simulate the production performance of tight gas reservoirs will greatly reduce the accuracy of the analysis results. This is caused by the particularity of the seepage mechanism of gas in tight gas reservoirs, which is mainly reflected in the following two aspects: 1. There is a "Klinkenberg" effect in the seepage of gas in tight cores, which makes its seepage law deviate from Darcy's linear seepage 2. Most of th...

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Application Information

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IPC IPC(8): G01N15/08G01N7/10
CPCG01N15/0826G01N7/10
Inventor 于俊红王刚肖智勇尚新春冯强
Owner SHANDONG UNIV OF SCI & TECH
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