Method for calculating parameters of primary fracture of overlying strata of coal seam

A calculation method and crack technology, applied in the fields of electrical digital data processing, design optimization/simulation, special data processing applications, etc., can solve the problem of low crack prediction accuracy and accuracy, unable to provide single crack parameters, unable to realize single crack prediction, etc. problems, to achieve the effect of improving the conversion rate of results, convenient admission, and simple methods

Pending Publication Date: 2021-08-31
北京大地高科地质勘查有限公司 +1
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Problems solved by technology

[0002] Fracture prediction technology has been widely used in many fields, especially in the energy field, where fracture prediction using geophysical technology is the most common; but limited by the current 3D seismic data acquisition and processing technol...

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  • Method for calculating parameters of primary fracture of overlying strata of coal seam

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Embodiment 1

[0027] This embodiment provides a specific implementation of the calculation method of the primary fracture parameters of the coal seam overlying rock, such as figure 1 shown, including the following steps:

[0028] I3D (three-dimensional scanning) fracture indication intensity data volume acquisition;

[0029] Water test pressure data acquisition;

[0030] Mud consumption data acquisition;

[0031] Calculation of crack equivalent width;

[0032] Crack equivalent length calculation.

[0033] Specifically, the I3D (three-dimensional scanning) fracture indication intensity data volume acquisition includes: based on the I3D (three-dimensional scanning) seismic advanced attribute module in Kendham software, the fracture attributes are extracted, and the fracture attributes include: energy attributes, dip angle attributes and azimuth angles Attributes, through multi-attribute fusion, based on the fracture indication intensity data formed after I3D (three-dimensional scanning) a...

Embodiment 2

[0043] This embodiment provides a specific implementation of the calculation method of the primary fracture parameters of the coal seam overlying rock, such as figure 1 As shown, according to the correlation between I3D (three-dimensional scanning) multi-attribute fracture prediction indication strength, water test pressure in grouting engineering, and mud loss during horizontal branch hole drilling, an equivalent calculation model for fracture extension length and fracture width is established. include:

[0044] (1) I3D (three-dimensional scanning) fracture indication intensity data volume acquisition, in which:

[0045] The I3D (three-dimensional scanning) seismic advanced attribute module in the Kingdom software is used to extract fracture attributes. The extraction process includes three fracture attributes, Symmetry, I3D (three-dimensional scanning) (Illuminatou3D) and I3D (three-dimensional scanning) Scan. Based on the fracture indication intensity data formed after the...

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Abstract

The invention discloses a method for calculating parameters of a primary fracture of overlying strata of a coal seam. The method comprises the following steps: acquiring an I3D fracture indication strength data body; acquiring water testing pressure data; acquiring slurry consumption data; calculating the equivalent width of the crack; calculating the equivalent length of the crack. The method is suitable for the technical field of coal mining, the method is simple, actual operation is convenient, in the coal mining exploration and mining process, mud leakage amount and water testing pressure data are convenient to record, the coverage is wide, real-time updating is achieved, and application and popularization of the method in the field of coal fields are facilitated. Meanwhile, the field of geological engineering integrated research is broadened, a correlation is established between equivalent length and equivalent width parameters of the crack and the slurry leakage amount and the water testing pressure, cognition of geology and engineers on underground conditions is unified, a unified measurement unit is used, and calculation data can be directly applied to engineering design and construction; the geophysical fracture prediction result is quickly converted to field application, and the result conversion rate of geological scientific research is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of coal mining, in particular to a method for calculating the parameters of primary cracks in overburden coal seams. Background technique [0002] Fracture prediction technology has been widely used in many fields, especially in the energy field, where fracture prediction using geophysical technology is the most common; but limited by the current 3D seismic data acquisition and processing technology, the fracture prediction accuracy and accuracy However, in the process of coal mining, many The application of this engineering technology needs to provide crack parameters to ensure the effectiveness and scientificity of engineering design and implementation. For this reason, this patent proposes the concepts of equivalent fracture length and equivalent fracture width. The purpose is to regard the fracture development strips predicted by 3D seismic as multiple fractures cutting and interweaving into an intercon...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 张彪陈庆黄辅强肖明国顾玉明李军姬朝辉李鹏孙红波阴慧胜
Owner 北京大地高科地质勘查有限公司
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