Method and device for measuring density of adsorptive methane in coal
A density measurement and adsorption technology, applied in measurement devices, specific gravity measurement, and determination of specific gravity by measuring pressure difference, etc., can solve the problems of coalbed methane exploration errors, inaccurate results, and complicated measurement operations.
Active Publication Date: 2020-12-22
CHINA UNIV OF MINING & TECH (BEIJING)
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[0005] Another object of the present disclosure is to provide a device for measuring the density of adsorbed methane in coal to solve the problem that the current measurement of the density of adsorbed methane in coal is complicated and the result is inaccurate, which brings large errors to the exploration of coalbed methane The problem
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[0053] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0054] In this disclosure, in the absence of a contrary statement, the used orientation words such as "up, down" can refer to figure 1 Orientation shown on the drawing. "Inside and outside" refer to the inside and outside of the outline of the corresponding part. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.
[0055] This disclosure provides a method for measuring the density of adsorbed methane in coal, specifically refer to figure 2 , the method for measuring the density of adsorbed methane in coal includes the following steps:...
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The invention relates to a method and device for measuring the density of adsorptive methane in coal. The method for measuring the density of adsorptive methane in coal comprises the following steps:acquiring the volume Vc of sample coal; acquiring the pore volume V(phi) of the sample coal, and placing the sample coal in a closed measurement space; acquiring the volume V1 of the measurement space; introducing a predetermined amount of methane into the measurement space; measuring the pressure P1 of the measurement space after the sample coal adsorbs methane; and calculating the density rho(eg) of the adsorptive methane in the sample coal through a formula as described in the specification, wherein in the formula, N is the number of molecules of a predetermined amount of methane introducedinto the measurement space, NA is the Avogadro constant, R is a gas constant, T is a thermodynamic temperature, and c is the equivalent curvature of the surface of the sample coal after adsorbing themethane. Through the above technical scheme, the density of the adsorptive methane in the coal can be directly calculated, operation is simple and convenient, and the result is accurate and reliable.
Description
technical field [0001] The present disclosure relates to the field of energy exploration equipment, in particular to a density measurement method and a density measurement device for adsorbed methane in coal. Background technique [0002] Geophysical exploration refers to the detection of geological conditions such as stratum lithology and geological structure by studying and observing changes in various geophysical fields. Due to the differences in density, elasticity, electrical conductivity, magnetism, radioactivity, and thermal conductivity of different rock formation media that make up the earth's crust, these differences will cause local changes in the corresponding geophysical fields. By measuring the distribution and variation characteristics of these physical fields, combined with known geological data for analysis and research, the purpose of inferring geological properties can be achieved. [0003] At present, the AVO technology is commonly used for oil and gas d...
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IPC IPC(8): G01N9/26G01N9/36
CPCG01N9/266G01N9/36
Inventor 曾葫邹冠贵佘佳生
Owner CHINA UNIV OF MINING & TECH (BEIJING)