Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Quantitative Method for Characterizing Open Pore Content in Coal

A quantitative characterization, open-pore technology, used in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc. Incomplete data, etc.

Active Publication Date: 2022-03-25
CHINA UNIV OF MINING & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their research is limited to the calculation of the hysteresis coefficient under a single pressure, and cannot quantitatively characterize the entire area of ​​the hysteresis loop; moreover, the compression effect of the mercury injection pressure on the coal matrix and the change law of the low-temperature liquid nitrogen adsorption curve are not considered in the calculation process , resulting in the calculated data not being able to completely and truly reflect the content of open pores in the coal

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Quantitative Method for Characterizing Open Pore Content in Coal
  • A Quantitative Method for Characterizing Open Pore Content in Coal
  • A Quantitative Method for Characterizing Open Pore Content in Coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to deepen the understanding of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0041] like figure 1 As shown, a method for quantitatively characterizing the content of open pores in coal includes the following steps,

[0042] Step 1: Carry out the mercury porosimetry test on the collected coal samples. The test adopts AutoPore-IV9500 automatic mercury porosimeter, and the test is carried out according to the China Petroleum and Natural Gas Industry Standard SY / T 5346-2005. The test uses pure coal, which is uniformly broken into 1 -2mm; before the test, the sample is dried to constant weight in the drying box, and then tested. During the test, the mercury injection pressure range of the instrument is 0.034-227.5MPa, and the corresponding pore siz...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for quantitatively characterizing the content of open pores in coal, which comprises the following steps: Step 1: Carry out a mercury porosimetry test on the collected coal sample, and obtain the corresponding mercury porosimetry hysteresis loop area and mercury injection and mercury removal Curve; Step 2: Simultaneously carry out low-temperature liquid nitrogen adsorption / desorption test on the collected coal samples, and obtain the corresponding low-temperature liquid nitrogen adsorption / desorption hysteresis loop area and adsorption / desorption curve; Step 3: According to the low-temperature liquid nitrogen obtained in step 2 The hysteresis loop type of the nitrogen adsorption / desorption curve distinguishes the coal sample with open pores or the coal sample with ink bottle pores; step 4: according to the results of the coal sample pore type distinction and the corresponding pore diameter in step 3, characterize the openness of the coal with the corresponding pore diameter Pore ​​content. This patent can completely and accurately identify the content of open pores in coal, and can be applied to other unconventional natural gas reservoirs, such as shale gas reservoirs, sandstone gas reservoirs, and the like.

Description

technical field [0001] The invention relates to the technical field of coal and rock open pore measurement, in particular to a method for quantitatively characterizing the content of open pores in coal. Background technique [0002] China is rich in coalbed methane resources, second only to Russia and Canada. The efficient exploitation of coalbed methane has important practical significance for ensuring the safe production of coal mines and improving my country's energy structure. Coal, as a complex porous organic medium, is the carrier for the occurrence of coalbed methane and the channel for its migration, which has a significant impact on the enrichment and development of coalbed methane. Effective pores in coal include two basic types: open pores and semi-closed pores. According to the mercury injection / removal curve and the "pore hysteresis loop" characteristics of low temperature liquid nitrogen adsorption / desorption, the connectivity and basic morphology of pores can...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/088G01N2015/0813
Inventor 杨兆彪张争光秦勇游振江赵俊龙李庚周斌扬
Owner CHINA UNIV OF MINING & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com