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

Recyclable fracturing fluid and preparation method thereof

A fracturing fluid and base fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as non-reusability, and achieve the effects of saving materials and water resources, reducing sewage, and reducing water pressure

Active Publication Date: 2014-01-15
北京国海能源技术研究院
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular chain of the thickener in the returned fracturing fluid has been deeply degraded and cannot be reused. It needs to be properly treated in accordance with environmental protection requirements before it can be discharged.

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
  • Recyclable fracturing fluid and preparation method thereof
  • Recyclable fracturing fluid and preparation method thereof
  • Recyclable fracturing fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The fracturing fluid includes the following main raw materials prepared in parts by weight: 0.2 part of guar gum derivative thickener, 0.02 part of crosslinking agent, 0.01 part of pH regulator, 1 part of fluid loss control agent, and 1 part of fungicide and 92.1 parts of water. The guar gum derivative thickener is small molecule guar gum; the cross-linking agent is organoboron; the pH regulator is sodium carbonate; the fluid loss reducer is modified starch ether DA1688; The agent is an aqueous solution with acrolein content of 0.5%.

[0029] Its preparation method comprises the following steps:

[0030] 1. Dissolve the thickening agent of guar gum derivatives in water and mix evenly to obtain the thickened base liquid;

[0031] 2. Add a pH regulator to the thickened base liquid prepared in step 1 to adjust the pH value of the thickened base liquid to 9-10;

[0032] 3. Slowly add a crosslinking agent to the thickened base liquid after adjusting the pH value in step 2...

Embodiment 2

[0035] The fracturing fluid includes the following main raw materials prepared in parts by weight: 0.35 parts of guar gum derivative thickener, 0.035 parts of crosslinking agent, 0.03 parts of pH regulator, 1 part of fluid loss control agent, and 1 part of fungicide and 96.5 parts of water.

[0036] The guar gum derivative thickener is any one of hydrophobically modified carboxymethyl hydroxypropyl guar gum; the crosslinking agent is organoboron; the pH regulator is potassium carbonate; the fluid loss control The agent is modified starch ether DA1688; the bactericide is an aqueous solution with a urea-formaldehyde content of 0.5%.

[0037] Its preparation method comprises the following steps:

[0038] 1. Dissolve the thickening agent of guar gum derivatives in water and mix evenly to obtain the thickened base liquid;

[0039] 2. Add a pH regulator to the thickened base liquid prepared in step 1 to adjust the pH value of the thickened base liquid to 9-10;

[0040] 3. Slowly ...

Embodiment 3

[0043] The fracturing fluid includes the following main raw materials prepared in parts by weight: 0.27 parts of guar gum derivative thickener, 0.027 parts of crosslinking agent, 0.02 parts of pH regulator, 1 part of fluid loss reducer, and 1 part of fungicide and 94.3 parts of water.

[0044] The guar gum derivative thickener is small molecule guar gum; the cross-linking agent is organoboron; the pH regulator is sodium hydroxide; the fluid loss reducer is modified starch ether DA1688; The bactericide is an aqueous solution containing 1,4-hydroquinone with a content of 0.5%.

[0045] Its preparation method comprises the following steps:

[0046] 1. Dissolve the thickening agent of guar gum derivatives in water and mix evenly to obtain the thickened base liquid;

[0047] 2. Add a pH regulator to the thickened base liquid prepared in step 1 to adjust the pH value of the thickened base liquid to 9-10;

[0048] 3. Slowly add a crosslinking agent to the thickened base liquid aft...

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 belongs to the technical field of oilfield fracturing stimulation, and particularly relates to a recyclable fracturing fluid and a preparation method thereof. The fracturing fluid is prepared from the following main raw materials in parts by weight: 0.2-0.35 part of a guar gum derivative thickener, 0.02-0.035 part of a cross-linking agent, 0.01-0.03 part of a pH regulator, 1 part of a fluid loss additive, 1 part of a bactericide and 92.1-96.5 parts of water. The recyclable fracturing fluid has the advantages of high flowback fluid recycling rate, and capabilities of turning waste into treasure, saving materials and water resource, reducing pollution discharge and reducing the pressure of water for underground operation.

Description

technical field [0001] The invention belongs to the technical field of oil field fracturing stimulation, and in particular relates to a recyclable fracturing fluid and a preparation method thereof. Background technique [0002] The water-based fracturing fluid commonly used at present usually uses guar gum or hydroxypropyl guar gum as the thickener, and is cross-linked with various ions to obtain a viscoelastic jelly, which has good sand-carrying performance and fluid loss control performance and rheological properties. Gel breakers such as oxidants, enzymes, and acids are often added to the fracturing fluid formula. After the fracturing operation is completed, the gel breaks and the viscosity drops to close to the viscosity of water, so as to facilitate the return of the fracturing fluid and avoid lasting damage to the formation. However, the molecular chain of the thickener in the returned fracturing fluid has been deeply degraded and cannot be reused. It needs to be prop...

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): C09K8/68
CPCC09K8/605C09K8/685C09K8/887C09K8/90
Inventor 张玄张鹏张聪忠张义勤
Owner 北京国海能源技术研究院
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