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Method for researching development characteristics of coal micro-pore system

A microscopic pore and phylogenetic technology, applied in the direction of suspension and porous material analysis, measuring devices, scientific instruments, etc., can solve the difficulty in quantitative and qualitative description of the microscopic pore system of coalbed methane reservoirs, and the development of microscopic pore systems of coalbed methane reservoirs To solve problems such as unclear characteristics, to achieve reliable technical support and simple and feasible methods

Inactive Publication Date: 2018-05-15
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

[0005] Although my country's coalbed methane exploration and development has experienced decades of development, it is still difficult to quantitatively and qualitatively describe the microscopic pore system of coalbed methane reservoirs. Many geological theoretical issues are still in the exploratory stage. Developmental features are unclear

Method used

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  • Method for researching development characteristics of coal micro-pore system
  • Method for researching development characteristics of coal micro-pore system
  • Method for researching development characteristics of coal micro-pore system

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Embodiment Construction

[0043] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0044] refer to figure 1 , the coal microscopic pore system development characteristic research method of the present invention comprises the following steps:

[0045] Step 1: Collect samples and prepare samples

[0046] 1. Collect samples

[0047] First, coal samples in the study area were collected by conventional methods.

[0048] Then, the coal sample is observed macroscopically, and its macroscopic characteristics are described and recorded in detail.

[0049] Finally, combined with the geological background and coal seam information of the study area, the macroscopic coal rock types of the coal samples were classified.

[0050] The coal samples used in this example (denoted as Y1) come from the Upper Permian coal-bearing strata in the southern part of the Sichuan Basin. The average thickness of this set of coal-bearing strata is...

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Abstract

The invention discloses a method for researching development characteristics of a coal micro-pore system. The method includes the steps: (1) collecting a coal sample and dividing coal macro-lithotypes; (2) photographing and observing the coal sample by an environment scanning electron microscope and analyzing coal sample micro-pore genetic types; (3) performing low-temperature nitrogen adsorptionexperiments on the coal sample to obtain the relative pressure, the pressure and the adsorption volume of the coal sample; (4) calculating the micro-pore volume, the pore specific surface area and thepore radius of the coal sample; (5) acquiring low-temperature nitrogen adsorption isothermal lines and adsorption loop lines, and analyzing the micro-pore shape of the coal sample according to the adsorption isothermal lines and the adsorption loop lines. The method has the advantages that the method is simple and feasible, the development characteristics of the coal micro-pore system can be objectively and comprehensively analyzed, and reliable technical support is provided for coal bed methane reserve prediction and development.

Description

technical field [0001] The invention relates to a method for studying the development characteristics of coal microscopic pore systems, and belongs to the technical field of coalbed gas microscopic reservoir evaluation. Background technique [0002] In recent years, with the rapid progress of my country's modernization and science and technology, energy issues, environmental issues, and coal mine safety issues have become increasingly prominent. Responding to environmental issues and developing a low-carbon economy require reducing the use of coal and oil. Therefore, the development and utilization of natural gas has been paid more and more attention. It can be said that the era of promoting clean natural gas as the main energy source has quietly arrived. According to data released by the National Development and Reform Commission, my country's natural gas production in 2015 was 1350×10 8 m 3 , the annual total consumption of natural gas reached 1932×10 8 m 3 , natural g...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 单长安
Owner XI'AN PETROLEUM UNIVERSITY
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