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

Mohr-Coulomb theory based mechanical stability quantitative analysis method for exploitation of aquo-complex

A technique of quantitative analysis and Coulomb theory, which is applied in the field of mechanical stability analysis of marine natural gas hydrate resource exploitation, can solve the problems that the hydrate mechanical stability analysis method cannot be quantified, and achieve the effect of convenient and intuitive use and accurate analysis results

Active Publication Date: 2019-05-17
QINGDAO INST OF MARINE GEOLOGY
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a quantitative analysis method for the mechanical stability of hydrate mining based on the Moore-Coulomb theory, which can not only quantitatively analyze the hydrate The stability of the wellbore or reservoir during production, giving the "stability" index, can also realize the stability analysis of the wellbore and reservoir in the whole area

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
  • Mohr-Coulomb theory based mechanical stability quantitative analysis method for exploitation of aquo-complex
  • Mohr-Coulomb theory based mechanical stability quantitative analysis method for exploitation of aquo-complex
  • Mohr-Coulomb theory based mechanical stability quantitative analysis method for exploitation of aquo-complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0046]This example discloses a quantitative analysis method for the mechanical stability of gas hydrate mining based on the Mohr-Coulomb theory, which is applicable to various mining methods such as vertical wells and horizontal wells for hydrates, and can analyze the stability of well walls and formations. The following uses water The flat well mining method is taken as an example to describe this embodiment in detail:

[0047] A quantitative analysis method for the mechanical stability of hydrate mining based on Mohr-Coulomb theory, including the following steps:

[0048] Ste...

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 Mohr-Coulomb theory based mechanical stability quantitative analysis method for the exploitation of an aquo-complex. The method comprises the following steps: (1) calculatingthrough numerical simulation to obtain the condition of stress distribution of a reservoir stratum in the exploitation of the aquo-complex; (2) establishing a quantitative index for a mechanical stability coefficient s on the basis of the Mohr-Coulomb shearing strength theory; (3) substituting the stress distribution obtained in the step (1) into the mechanical stability coefficient s, and obtaining distribution of the mechanical stability coefficient; and (4) quantitatively analyzing the mechanical stability of the reservoir stratum on the basis of the mechanical stability coefficient obtained in the step (3). The method overcomes the defects that the traditional Mohr-Coulomb shearing strength theory only can qualitatively analyze in the analysis of the mechanical stability in the exploitation of aquo-complex, the concept of the stability coefficient is used to quantitatively describe the mechanical stability, the stability within the full research scope is quantitatively described,the method is more convenient and intuitive to use, the quantitative analysis result is more accurate, and the method has higher practical reference and application values.

Description

technical field [0001] The invention relates to the technical field of mechanical stability analysis for exploitation of marine natural gas hydrate resources, in particular to a quantitative analysis method for the mechanical stability of hydrate exploitation based on the Moore-Coulomb theory. Background technique [0002] Natural gas hydrate has huge resources and high energy density, making it an efficient and clean energy source. International and domestic hydrate production tests show that mechanical stability is an important factor restricting hydrate production. When hydrate is mined under pressure, on the one hand, the decrease in pore pressure causes the increase of sediment shear stress, which increases the load on the sediment; on the other hand, the hydrate acts as a cement in the sediment. strength will be reduced. When the load of the sediment exceeds the strength of the sediment, the hydrate reservoir may be destabilized and destroyed; at the same time, due t...

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 Applications(China)
IPC IPC(8): E21B49/00E21B49/08
Inventor 万义钊陈强胡高伟吴能友刘昌岭李彦龙孙建业
Owner QINGDAO INST OF MARINE GEOLOGY
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