Fracturing fluid for coal-bed gas well and use thereof

A fracturing fluid and pulverized coal technology, which is applied in wellbore/well components, drilling composition, production fluid, etc., can solve the problems of insufficient recovery of coalbed methane and the inability to increase the critical desorption pressure, etc. The effect of critical desorption pressure, increasing single well production, and improving economic benefits

Inactive Publication Date: 2015-08-26
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fracturing fluid in the prior art cannot increase the critical desorption pressure, resulting in insufficient recovery of coalbed methane

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The steps are the same as in Comparative Example 1, except that the fracturing fluid used also contains 0.04% ClO 2 . The critical desorption pressure obtained by the test is 1.4MPa higher than that in Comparative Example 1.

Embodiment 2

[0019] Same as Example 1, the difference is that the fracturing fluid used contains 0.045% ClO 2 . The critical desorption pressure obtained by the test is 2.6MPa higher than that in Comparative Example 1.

Embodiment 3

[0021] Same as Example 1, the difference is that the fracturing fluid used contains 0.05% ClO 2 . The critical desorption pressure obtained by the test is 1.8 MPa higher than that in Comparative Example 1.

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 fracturing fluid for a coal-bed gas well and a use thereof. The fracturing fluid comprises water, an antiswelling agent, a discharge aiding agent, a coal dust dispersant and chlorine dioxide, wherein the content of chlorine dioxide is in a range of 0.01-0.10wt%. The fracturing fluid improves coal seam seepage conditions, enlarges a flow discharge area, improves a single well yield and improves critical desorption pressure.

Description

technical field [0001] The invention relates to fracturing transformation of coal bed gas wells, in particular to a fracturing fluid for coal bed gas wells. The present invention also relates to the application of the above-mentioned fracturing fluid. Background technique [0002] Unlike conventional natural gas, coalbed methane belongs to the field of unconventional oil and gas reservoirs. Coalbed methane is mainly stored in the inner surface of coal matrix pores in the state of adsorption, and only a small amount is stored in free state in coal cleats and other fractures. The output of CBM must go through the process of analysis-diffusion-seepage. Since the permeability of coalbed methane reservoirs generally decreases, the average is generally 0.3-0.5×10 -3 μm 2 , and also has the characteristics of low porosity and low pressure. For the vast majority of coalbed methane wells, if hydraulic fracturing stimulation measures are not implemented, many wells will have no ind...

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): C09K8/68E21B43/26
Inventor 孙良田郑承纲柴国兴王培义罗晓义黄伟汪友平
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap