Method for determining physical parameters of industrial components of coal

A coal rock and industrial technology, applied in the direction of earthwork drilling, wellbore/well components, etc., can solve the problems that affect the logging interpretation of coal reservoir parameters, and achieve the effect of high accuracy

Inactive Publication Date: 2014-05-14
YANSHAN UNIV
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Problems solved by technology

That is, it is difficult to obtain accurate ash, fixed carbon and volatile density parameters and acoustic velocity parameters by conventional experimental methods, so it affects the logging interpretation of coal reservoir parameters

Method used

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  • Method for determining physical parameters of industrial components of coal
  • Method for determining physical parameters of industrial components of coal
  • Method for determining physical parameters of industrial components of coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] The specific implementation manner of the present invention is illustrated below with an example.

[0021] Coal rock samples can be obtained through mines or drilling cores, and the relative content of various industrial components of coal rocks, the density of coal rocks, and the velocity of sound waves can be measured respectively. The experimental results are shown in attached table 1.

[0022] Bring the experimental parameters into formula (1) respectively. The density of water is taken as 1.0g / cm 3 , as a known condition, only the densities of the other three components are calibrated. According to the data in Table 1, the enumeration method is used to calibrate the result: the ash density is 2.47g / cm 3 , fixed carbon density 1.39g / cm 3 , volatile matter density 1.05g / cm 3 , the average relative error rate of all samples is 2.0%, and the precision is relatively high.

[0023] In the same way, bring the experimental parameters into formula (2) respectively. T...

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Abstract

The invention provides a method for determining the physical parameters (density and acoustic velocity) of all industrial components (ash, fixed carbon and volatile components) of coal. According to the technical scheme, the relative contents of all the industrial components of the coal and the density and the acoustic velocity of the coal are measured. On the basis of tests on a large number of samples, the density and the acoustic velocity of the ash, the fixed carbon and the volatile components are calibrated with the enumeration method. The method provides most basic parameters for well logging interpretation of coal seams in the exploration and development process of coal field and coal seam gas, and a basis is laid for quantitative interpretation of the physical properties of the coal quality and the coal reservoir, and the coal seam gas content.

Description

technical field [0001] The invention belongs to the fields of coalfield exploration and coalbed methane exploration and development, and relates to a method for determining the physical parameters of coal and rock industrial components, specifically the determination of the density and sound wave velocity of each industrial component of coal and rock (ash content, fixed carbon, volatile matter) method. Background technique [0002] In the 1980s, with the development of coalfield digital logging technology, coalfield geological logging and interpretation technology has been continuously improved, and the evaluation of coal seam thickness and coal quality has become more and more perfect, which can basically meet the needs of coal mining. However, with the demand for coalbed methane development at home and abroad in the past ten years, the interpretation accuracy of coal reservoir parameters is getting higher and higher, and the number of interpretation indicators is also incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 邵先杰
Owner YANSHAN UNIV
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