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

Method for measuring pore size distribution of rock material

A pore size distribution and rock material technology, which is applied in the analysis of suspensions and porous materials, material analysis through resonance, and material analysis, can solve the problems of time-consuming and difficult to accurately describe the pore size distribution of rock materials, etc. The effect of wide range and high measurement accuracy

Inactive Publication Date: 2020-05-15
CENT SOUTH UNIV
View PDF12 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different lithologies of various rock materials, it is difficult to accurately describe the pore size distribution inside the rock material by using the conversion coefficient obtained by empirical methods, and the method of determining the conversion coefficient by nuclear magnetic resonance combined with mercury injection method is time-consuming.

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
  • Method for measuring pore size distribution of rock material
  • Method for measuring pore size distribution of rock material
  • Method for measuring pore size distribution of rock material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Example Testing the pore size distribution of sandstone-like samples

[0042] (1) Prepare the sandstone sample to be tested into a standard cylindrical sample with a diameter of 5cm and a height of 2.5cm, place the sample in a vacuum saturation device for negative pressure vacuuming, the negative pressure is -0.1MPa, and the vacuum is saturated for 4h , until the sample is saturated with water.

[0043](2) NMR testing is carried out on the water-saturated sandstone sample. The parameters of the NMR tester are set as: magnet strength=0.52T, center frequency=21MHz, O1=2691500Hz, TW=1500, NECH=6000. The saturated porosity and T2 spectrum curve of sandstone-like samples obtained by nuclear magnetic resonance, the saturated porosity of sandstone samples is 6.329%, and the T2 spectrum is as attached figure 1 As shown, the maximum value of T2 is 471.375ms, and the minimum value of T2 is 0.012ms. And according to the T2 spectrum inversion of the capillary pressure-influent cu...

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

No PUM Login to View More

Abstract

The invention discloses a method for measuring pore size distribution of a rock material. The method comprises the following steps: acquiring a capillary pressure-water inlet cumulative saturation curve by adopting a centrifugal dehydration test; then, through curve fitting with nuclear magnetic resonance T2 spectrum inversion, obtaining optimal conversion coefficient, and finally, obtaining aperture distribution. Compared with the existing method, the method disclosed by the invention has the advantages that the operation is simple and convenient, the measurable aperture range is large, the measurement precision is high, the sample is not damaged, and the repeated measurement can be realized.

Description

technical field [0001] The invention belongs to a method for measuring the pore size distribution of rock materials. Background technique [0002] Affected by a series of internal and external factors such as diagenesis, geological tectonics, and weathering, there are pore structures and defects of different scales in the interior of rock materials. In different engineering backgrounds, the existence of these pore structures brings different effects. For example, for rock slopes in cold regions, the existence of pores above the middle pores provides good storage space and water conduction channels for water storage and infiltration, and provides a basis for the deterioration of rock slopes due to freeze-thaw damage. However, for shale gas storage rock formations and petroleum oil storage rock formations, the more developed the pore structure, the stronger the gas storage and oil storage capacity of the rock formation with larger pore diameter. In a word, the distribution c...

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
IPC IPC(8): G01N15/08G01N24/08
CPCG01N15/088G01N24/081
Inventor 邓红卫虞松涛邓畯仁田广林蒋震
Owner CENT SOUTH UNIV
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