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

Analysis method and device for self-supporting fracture conductivity

A technology of conductivity and analysis method, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of poor accuracy of conductivity, large difference in fluidity, and conductivity test of self-supporting fractures. Poor accuracy and other problems, to achieve the effect of improving accuracy

Active Publication Date: 2022-06-03
PETROCHINA CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, clean water or a solution added with clay stabilizer is used as the test fluid, its fluidity in self-supporting fractures is quite different from that of shale gas itself in self-supporting fractures, and the liquid test fluid is different from that of shale gas. The physical and chemical reactions that occur will also have a greater impact on the test results of the self-supporting fracture conductivity, resulting in poor accuracy of the self-supporting fracture conductivity test
On the other hand, the existing research on the conductivity of self-supporting fractures does not consider the non-Darcy effect when the test fluid flows at high speed, so there is a certain gap between the measured conductivity of self-supporting fractures and the actual conductivity of self-supporting fractures. deviation, which will also lead to poor accuracy of self-supporting fracture conductivity test
[0005] Therefore, there is a problem of poor accuracy in determining the conductivity of self-supporting fractures in the prior art

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
  • Analysis method and device for self-supporting fracture conductivity
  • Analysis method and device for self-supporting fracture conductivity
  • Analysis method and device for self-supporting fracture conductivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Confining pressure refers to the pressure exerted on it by the surrounding rock mass of the rock. The confining pressure of rocks deep underground, mainly

[0040] The preset displacement amount is a preset displacement amount, for example, the preset displacement amount can be set to 0.1mm.

[0041] In a further embodiment, the core sample is a cylindrical core sample. In a further example

[0055]

[0058]

[0061]

[0064]

[0073]

[0075] Y=k

[0079]

[0085] Step 403, determining the conductivity of the self-supporting fracture according to the minimum value of the square sum function.

[0089]

[0092]

[0094]

[0100] The embodiment of the present invention also provides a self-supporting fracture conductivity analysis device, such as the following embodiments

[0106] The flow conductivity determination module 604 is configured to use the least squares method to determine the flow rate according to the gas flow equation.

[0117] FIG. 9 shows the determination o...

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 and device for analyzing the conductivity of a self-supporting fracture. The method includes: shearing a core sample under a preset confining pressure to form a self-supporting fracture with a preset displacement. Izbash law and gas state equation, determine the gas flow equation of the self-supporting fracture power exponential form, determine the gas flow equation of the self-supporting fracture according to the gas flow equation of the power exponential form, according to the gas flow equation, use The least squares method determines the conductivity of the self-supporting fracture. The invention uses gas as the medium to avoid the damage effect of cuttings liquid on the analysis of the conductivity of self-supporting fractures. On the other hand, using the gas flow equation based on the power exponent form to determine the conductivity of self-propped fractures can express the conductivity of self-propped fractures more accurately. Therefore, the present invention can improve the accuracy of analyzing the conductivity of self-supporting fractures.

Description

Analysis method and device of self-supporting fracture conductivity technical field The present invention relates to oil and gas exploitation technical field, relate in particular to a kind of analytical method of self-supporting fracture conductivity and device. Background technique [0002] This section is intended to provide a background or context for the embodiments of the invention recited in the claims. description here Prior art is not admitted to be included in this section. [0003] Shale gas is an important unconventional energy source in my country. However, due to the characteristics of low porosity and low permeability in shale gas reservoirs, the It is difficult to mine, and currently, large-scale low-viscosity slick water is mainly used for volume fracturing. Natural fractures in shale reservoirs It is relatively developed. In the process of hydraulic fracturing, the change of fluid pressure and formation stress causes the tensile or shear rupture of ...

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): E21B43/267E21B47/00
CPCE21B43/267E21B47/00
Inventor 修乃岭胥云严玉忠管保山王欣王臻付海峰梁天成田国荣
Owner PETROCHINA CO LTD
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