Supercharge Your Innovation With Domain-Expert AI Agents!

Supramolecular fracturing fluid based on modified polyacrylamide and preparation method thereof

A polyacrylamide and acrylamide technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of large amount of surfactant, harsh preparation conditions and high cost, and achieve good resistance to divalent salts, It is easy to popularize and apply, and the effect of on-site preparation is convenient

Active Publication Date: 2021-11-19
四川川庆井下科技有限公司
View PDF15 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the viscoelastic surfactants used at home and abroad are mainly cationic, and their use faces two problems: one is that cationic surfactants are easy to adsorb with negatively charged sandstone, thereby changing the wettability of formations and increasing oil and gas seepage The capillary resistance affects the recovery factor; the second is that the biocompatibility of the cationic surfactant is poor, so it is subject to many restrictions in use
However, due to the harsh preparation conditions and weak viscoelasticity of the anionic surfactant viscoelastic fluid, the viscoelasticity and temperature resistance of the currently used anionic surfactant cleaning fracturing fluid are compared with those of the cationic surfactant cleaning fracturing fluid. There is still a big gap, and it can only be used in some medium and low temperature reservoirs
In addition, the amount of surfactant used in clean fracturing fluid is large and the cost is high. How to reduce the amount of surfactant and control the cost of fracturing fluid are also key factors affecting its popularization and application

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
  • Supramolecular fracturing fluid based on modified polyacrylamide and preparation method thereof
  • Supramolecular fracturing fluid based on modified polyacrylamide and preparation method thereof
  • Supramolecular fracturing fluid based on modified polyacrylamide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A supramolecular cleaning fracturing fluid based on modified polyacrylamide and anionic surfactant, the specific preparation steps are as follows:

[0051] S1. According to the molar ratio of acrylamide, sodium acrylate, and functional monomer acryloxyethyl benzyl dimethyl ammonium chloride, the molar ratio is 85:15:1, and the modified polyacrylamide MPAM is prepared by aqueous solution polymerization- 7. The molecular weight is 4 to 5 million.

[0052] S2. the purified anionic surfactant sodium oleic acid ethyl sulfonate is dissolved in methanol of equal mass to make a pre-solution of mass fraction 50%; get the modified polyacrylamide MPAM prepared in 0.4g S1- 7 Dissolve in 300g of water, then add 3.2g of benzyltrimethylammonium chloride and 16g of pre-solution in sequence, and dissolve evenly to obtain solution A; dissolve 16g of potassium chloride in 100g of water to obtain solution B, and add solution B to the solution Stir evenly in A to form a viscoelastic supram...

Embodiment 2

[0054] A supramolecular cleaning fracturing fluid based on modified polyacrylamide and anionic surfactant, the specific preparation steps are as follows:

[0055] S1. According to the molar ratio of acrylamide, sodium acrylate, and functional monomer acryloxyethyl octadecyldimethylammonium chloride of 85:15:0.5, the modified polyacrylamide is prepared by aqueous solution polymerization MPAM-18, molecular weight 4-5 million.

[0056] S2. the purified anionic surfactant sodium oleic acid ethyl sulfonate is dissolved in methanol of equal mass to make a pre-solution of mass fraction 50%; get the modified polyacrylamide MPAM prepared in 0.4g S1- Dissolve 18 in 300g of water, then add 3.2g of benzyltrimethylammonium chloride and 16g of pre-solution in sequence, and dissolve evenly to obtain solution A; dissolve 16g of potassium chloride in 100g of water to obtain solution B, and add solution B to the solution Stir evenly in A to form a viscoelastic supramolecular cleaning fracturin...

Embodiment 3

[0058] A supramolecular cleaning fracturing fluid based on modified polyacrylamide and anionic surfactant, the specific preparation steps are as follows:

[0059] S1. According to the molar ratio of acrylamide, sodium acrylate, and functional monomer acryloxyethyl octadecyldimethylammonium chloride of 85:15:0.5, the modified polyacrylamide is prepared by aqueous solution polymerization MPAM-18, molecular weight 4-5 million.

[0060] S2. Dissolve the purified anionic surfactant sodium erucamide propyl sulfonate in isopropanol of equal mass to make a pre-solution with a mass fraction of 50%; get the modified polyacrylamide MPAM prepared in 0.8g S1 -18 was dissolved in 250g of water, then sequentially added 8g of benzyl dihydroxyethyl methyl ammonium chloride, 30g of pre-solution, and dissolved uniformly to obtain solution A; 20g of potassium chloride was dissolved in 150g of water to obtain solution B, and the solution Add B into solution A and stir evenly to form a viscoelasti...

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 supramolecular fracturing fluid based on modified polyacrylamide and a preparation method thereofd. The fracturing fluid comprises the following components: modified polyacrylamide, a sulfonate anionic surfactant, a water-soluble assistant salt, an organic solvent, a counter ion salt and water. The supramolecular fracturing fluid is prepared from the following components in parts by weight: 0.01 to 3 parts of modified polyacrylamide, 0.1 to 30 parts of sulfonate anionic surfactant, 0.01 to 20 parts of water-soluble assistant salt, 0.1 to 20 parts of organic solvent, 0.1 to 30 parts of counter ion salt and 80 to 150 parts of water. The supramolecular fracturing fluid has good viscoelasticity, temperature resistance and shear resistance, can reduce the use amount of a surfactant and the cost of the fracturing fluid, has high tolerance to calcium and magnesium ions, is simple in component and convenient to prepare, and can meet the requirements of oil and gas field development on the fracturing fluid.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a supramolecular fracturing fluid based on modified polyacrylamide and a preparation method thereof. Background technique [0002] Hydraulic fracturing is a key stimulation measure in the development of low-permeability oil and gas reservoirs, and the performance of fracturing fluid has an important impact on the stimulation effect. The clean fracturing fluid based on the worm-like micellar network structure constructed by the viscoelastic surfactant (Viscoelastic Surfactant, VES) has the ability to automatically break the gel when it is diluted with hydrocarbons (such as crude oil) or formation water, the gel-breaking fluid has no residue, and the energy can be improved. The fracturing fluid flowback rate and low damage to the formation are especially suitable for fracturing low-permeability tight oil and gas reservoirs. [0003] At present, the viscoelastic su...

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
CPCC09K8/602C09K8/68C09K8/882C08F220/56C08F220/06C08F220/34Y02P20/54
Inventor 吴越孙亚东张祥枫于世虎王鹏祥李嘉周怡吴安林张晓虎陈星宇蒋琪杨立
Owner 四川川庆井下科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com