Salt-resistant polyacrylamide for oil displacement and preparation method thereof

A polyacrylamide and acrylamide technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of insufficiency of shearing, polyacrylamide intolerant of temperature, corrosion of pipeline equipment, etc., and achieve product solubility. Improve, improve viscosity retention rate, improve the effect of slow dissolution

Active Publication Date: 2019-01-25
黑龙江吉地油田服务股份有限公司
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oilfield produced water contains a large amount of organic substances, which provide a good environment for the growth of a large number of bacteria. Among them, sulfate-reducing bacteria, iron bacteria, and saprophytic bacteria can corrode pipeline equipment and block oil layers, causing serious consequences to oilfield production.
Moreover, the viscosity retention rate of the polymer mother liquor prepared with existing sewage is low
At the same time, ordinary polyacrylamide is not resistant to temperature and shear, and cannot effectively flush the formation, so that ordinary polymers are no longer suitable for the production of this oil layer, and the oil recovery rate of existing polymers is also constantly declining. Therefore, affected by shear factors such as water quality, some high-temperature oil reservoirs, high-salinity oil reservoirs, and field equipment, higher requirements are placed on the performance of polymer products such as sewage resistance, adaptability, shear resistance, temperature resistance and salt resistance.

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
  • Salt-resistant polyacrylamide for oil displacement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. A salt-resistant polyacrylamide for oil displacement, comprising components and parts by weight: 770 parts of deionized water, 150 parts of acrylamide, 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, functional 5 parts of monomer microemulsion.

[0029] The components and parts by weight of the functional monomer microemulsion are: deionized water: 300 parts, acrylamide: 100 parts, acrylic acid 10 parts, functional monomer with n value of 10 30 parts, 1 part of sodium acetate, 10 parts of sodium hydroxide, 300 parts of white oil, 20 parts of sodium lauryl sulfate.

[0030] Two, a kind of preparation method of salt-resistant polyacrylamide for above-mentioned oil displacement, the steps are as follows:

[0031] Step 1, water phase preparation:

[0032] 300 parts of deionized water, 100 parts of acrylamide, 10 parts of acrylic acid, functional monomer with n value of 10 30 parts, 1 part of sodium acetate, stir evenly, and adjust the pH value to 7 with a mas...

Embodiment 2

[0041] 1. A salt-resistant polyacrylamide for oil displacement, comprising the following components in parts by weight: 840 parts of deionized water, 260 parts of acrylamide, 30 parts of sodium vinyl phosphate, and 40 parts of functional monomer microemulsion.

[0042] The components and parts by weight of the functional monomer microemulsion are: 400 parts of deionized water, 150 parts of acrylamide, 20 parts of acrylic acid, and a functional monomer whose n value is 8 50 parts, 6 parts of anhydrous sodium sulfate, the mass fraction is 10% sodium hydroxide, 500 parts of white oil, 50 parts of fatty alcohol polyoxyethylene ether.

[0043] Two, a kind of preparation method of salt-resistant polyacrylamide for above-mentioned oil displacement, the steps are as follows:

[0044] Step 1, water phase preparation:

[0045] 400 parts of deionized water, 150 parts of acrylamide, 20 parts of acrylic acid, functional monomer with n value of 8 50 parts, 6 parts of anhydrous sodium sul...

Embodiment 3

[0054] 1. A salt-resistant polyacrylamide for oil displacement, comprising the following components in parts by weight: 800 parts of deionized water, 200 parts of acrylamide, 20 parts of vinylpyrrolidone, and 20 parts of functional monomer microemulsion.

[0055] The components and parts by weight of the functional monomer microemulsion are: deionized water: 330 parts, acrylamide: 120 parts, acrylic acid 15 parts, functional monomer with n value of 16 40 parts, 3 parts of sodium acetate, 10% sodium hydroxide by mass fraction, 400 parts of white oil, 35 parts of linear alkylbenzene sulfonate sodium.

[0056] Two, a kind of preparation method of salt-resistant polyacrylamide for above-mentioned oil displacement, the steps are as follows:

[0057] Step 1, water phase preparation:

[0058] 330 parts of deionized water, 120 parts of acrylamide, 15 parts of acrylic acid, functional monomer with n value of 16 40 parts, 3 parts of sodium acetate, stir evenly, and adjust the pH val...

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 relates to salt-resistant polyacrylamide for oil displacement. The salt-resistant polyacrylamide is prepared from the following components in parts by weight: 770-840 parts of deionizedwater, 150-260 parts of acrylamide, 10-30 parts of an anionic monomer and 5-40 parts of functional monomer microemulsion. The invention further relates to a preparation method for the salt-resistant polyacrylamide for oil displacement. According to the salt-resistant polyacrylamide and the preparation method thereof, the functional monomer is introduced into a polymerization formula, so that sulfate-reducing bacteria, iron bacteria, saprophytic bacteria and the like in sewage can be inhibited, the viscosity retention rate of the salt-resistant polyacrylamide for oil displacment in the sewage for 180 days is greater than 90%, and therefore the viscosity retention rate of the polyacrylamide in the sewage is greatly increased; and meanwhile, the functional monomer adopts a microemulsion preparation mode, blocks in a molecular structure of a product are more uniform, the solubility of the product is greatly improved, and therefore the problem that conventional polyacrylamide is dissolved slowly in the sewage or in high-salinity brine can be solved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a salt-resistant polyacrylamide for oil displacement and a preparation method thereof. Background technique [0002] With the increase of oil field exploitation depth, the temperature and salinity of the oil layer are also increasing, and in the process of oil field development, in order to improve the recovery rate, the method of artificial water injection is often used to replenish energy to the oil layer and increase the pressure of the formation. The water content of crude oil continues to rise. After the produced crude oil is demulsified, the oil and water phases are separated. However, the oilfield produced water contains a large amount of organic substances, which provide a good environment for the growth of a large number of bacteria. Among them, sulfate-reducing bacteria, iron bacteria, and saprophytic bacteria can corrode pipeline equipment a...

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): C08F220/56C08F220/58C08F220/06C08F226/10C08F230/02C08F220/54C08F226/02C09K8/588
CPCC08F220/56C09K8/588C08F220/585C08F220/06C08F230/02C08F226/10C08F220/54C08F226/02
Inventor 孙安顺
Owner 黑龙江吉地油田服务股份有限公司
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