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Porosity inversion method of time-difference sound speed logging curve

A well logging curve and porosity technology, which is applied in the fields of seismology, measuring devices, suspension and porous material analysis for well logging records, and can solve the problem of few well logging curve inversions applied to the field of coal exploration technology, etc. question

Inactive Publication Date: 2017-08-29
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

[0002] The main methods to obtain rock porosity are core measurement and geophysical prospecting methods. At present, scholars at home and abroad have done a lot of research on the relationship between porosity and seismic data, such as using gamma-gamma and apparent resistivity logging curves to invert porosity , and then reflect the development of fractures, but most of them are used in the field of oil exploration, and rarely apply log curve inversion to the field of coal exploration technology

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  • Porosity inversion method of time-difference sound speed logging curve
  • Porosity inversion method of time-difference sound speed logging curve

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[0011] specific implementation plan

[0012] The present invention will be further described below in conjunction with the accompanying drawings and examples of the application of the present invention.

[0013] figure 1 It is a flow chart of the inversion method of rock shale content in the present invention. Such as figure 1 As shown, the method includes:

[0014] Step A, using geophysical prospecting means to obtain time difference sound velocity logging curve data;

[0015] Step B, deriving the actual quantitative data of the rock transit velocity sound velocity according to the transit velocity sound velocity logging curve;

[0016] Step C, based on the actual time-difference sound velocity quantitative data, use the formula to invert the porosity data;

[0017] Step D, using AutoCAD software to reconstruct the porosity curve according to the inverted porosity data;

[0018] Step E, analyzing the porosity curve to infer the development degree of rock fractures.

[...

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Abstract

The invention discloses a porosity inversion method of a time-difference sound speed logging curve, and belongs to the technical field of coal exploration. The method comprises that data of the time-difference sound speed logging curve is obtained by utilizing a geophysical prospecting means; practical quantified data of the time-difference sound speed of rocks is exported according to the time-difference sound speed logging curve; according to the practical time-difference sound speed quantified data, the porosity is inversed via a formula; according to porosity inversion data, AutoCAD is used to reconstruct a porosity curve; and the porosity curve is analyzed to deduce the growth degree of rock cracks. The logging reversion method commonly used in crack growth in the field of petroleum exploration is applied to the coal field, the logging is utilized fully, the rock porosity in certain depth range of a mining area is reflected more effectively, the crack growth condition is represented more visually to certain extant, and a new idea and method are provided for research on crack growth in the coal field.

Description

technical field [0001] The invention relates to the technical field of coal exploration, in particular to a porosity inversion method. Background technique [0002] The main methods to obtain rock porosity are core measurement and geophysical prospecting methods. At present, scholars at home and abroad have done a lot of research on the relationship between porosity and seismic data, such as using gamma-gamma and apparent resistivity logging curves to invert porosity , and then reflect the development of fractures, but most of them are used in the field of petroleum exploration, and rarely apply log curve inversion to the field of coal exploration technology. The present invention utilizes the time-difference sound velocity logging curve to invert the porosity, and then analyzes the development of fractures, fully utilizes the logging data, and provides a new idea and method for studying the development of fractures in the coal field. Contents of the invention [0003] 1....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40G01N15/08
CPCG01N15/088G01V1/40
Inventor 李鹏飞陈秀艳刘启蒙
Owner ANHUI UNIV OF SCI & TECH
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