Coal seam logging evaluation method and device
An evaluation method and evaluation device technology, which is applied in the direction of measuring devices, soil material testing, suspension and porous material analysis, etc., can solve the problems of low accuracy, large difference in compensation density, uncertainty of logging evaluation methods, etc. , to achieve accurate results and high certainty
Active Publication Date: 2020-08-11
PETROCHINA CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Due to the difference in lithology, physical properties, water content, etc. of coal seams, the compensation density varies greatly. Therefore, the above-mentioned logging evaluation method has great uncertainty, resulting in low evaluation accuracy.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0041] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0042] Please refer to figure 1 , which shows a flow chart of a coal seam logging evaluation method provided by an embodiment of the present invention. Such as figure 1 As shown, the logging evaluation method of this coal seam may include the following steps:
[0043] 101: Obtain the natural gamma ray value and compensation density of the coal seam according to the logging data of the coal seam;
[0044] 102: Obtain the relative value of natural gamma of the coal seam according to the natural gamma value of the coal seam;
[0045] 103: Evaluate the porosity of the coal seam according to the compensation density of the coal seam and the relative value of the natural gamma ray of the coal seam according to the formula Φ=X×DEN-Y×Igr-Z....
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a coal seam well logging evaluation method and a device and belongs to the technical field of coal seam development. The method comprises the steps of obtaining a natural gammavalue and a compensation density of a coal seam according to coal seam well logging information; obtaining a natural gamma relative value of the coal seam according to the natural gamma value of thecoal seam; evaluating a porosity of the coal seam according to the compensation density of the coal seam and a natural gamma relative value of the coal seam and according to a formula phi = X*DEN-Y*Igr-Z, wherein the phi is the porosity, the DEN is the compensation density, the Igr is the natural gamma relative value, and the X, Y and Z are constants. The device comprises a first obtaining module,a second obtaining module and an evaluating module. The method disclosed by the invention takes an effect of a coal seam structure characteristic to the compensation density into consideration, the natural gamma relative value has a higher accuracy to the natural gamma value, and well logging evaluation is performed according to the natural gamma relative value of the coal seam and the compensation density of the coal seam after the natural gamma relative value of the coal seam is obtained according to the natural gamma value of the coal seam; thus, evaluation results are more accurate.
Description
technical field [0001] The invention relates to the technical field of coal seam development, in particular to a coal seam logging evaluation method and device. Background technique [0002] At present, logging data are widely used in logging evaluation of coal seams. For example, the porosity of coal seams can be evaluated through well logging data. [0003] In the related art, when the coal seam is evaluated by logging, the compensation density of the coal seam is obtained according to the single logging data of the coal seam, and the porosity of the coal seam is evaluated according to the compensation density of the coal seam. [0004] In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: [0005] Due to the differences in lithology, physical properties, and water content of coal seams, the compensation density varies greatly. Therefore, the above-mentioned logging evaluation methods have l...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N33/24
CPCG01N15/088G01N33/24
Inventor 周明顺刘迪仁杨延辉潘景丽王芳赵国瑞侯翠芬殷洁张永平
Owner PETROCHINA CO LTD