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

Hydrophobically associated gelled acid thickening agent and preparation method thereof

A technology of hydrophobic association and gelling acid, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low residual acid flowback efficiency, long swelling time, poor compatibility, etc., and achieve residual acid flowback. High efficiency, short swelling time and good thermal stability

Inactive Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic gelling acid thickeners generally have defects such as long swelling time, poor compatibility, low efficiency of residual acid flowback and high cost, which cannot meet the increasingly stringent construction requirements on site.

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
  • Hydrophobically associated gelled acid thickening agent and preparation method thereof
  • Hydrophobically associated gelled acid thickening agent and preparation method thereof
  • Hydrophobically associated gelled acid thickening agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: Preparation of gelled acid thickener.

[0049] (1) Add 15% acrylamide, 0.1% cetyldimethylethylammonium bromide, 2% dimethyldiallylammonium chloride, 0.02% ethyl ammonium to a certain amount of deionized water Disodium diamine tetraacetate and 0.02% urea were stirred and dissolved, and nitrogen gas was filled for 30 minutes to prepare a comonomer mixture.

[0050] (2) Add 0.02% of the total mass of azobisisobutylamidine hydrochloride and 0.02% of 2,5-dimethyl-hexyl-(2,5)-bishydroperoxide to the above-mentioned comonomer mixture Initiate with 0.02% sodium bisulfite, the reaction temperature is 70° C., and the reaction time is 3.5 hours to obtain a gel-like thickener.

[0051] (3) The thickener is granulated, dried, pulverized and sieved to obtain dry thickener granules.

[0052] After measurement, the molecular weight of the gelled acid thickener is 4 million, and the particle size of the particles is 50-110 μm.

[0053] The rheological curve of gelling aci...

Embodiment 2

[0055] Embodiment 2: Preparation of gelled acid thickener.

[0056] (1) To a certain amount of deionized water, 20% acrylamide, 0.2% cetyl acrylate dimethyl ethyl ammonium bromide, 3% dimethyl diallyl ammonium chloride, 0.03% Disodium edetate and 0.03% urea were stirred and dissolved, and after being filled with nitrogen for 30 minutes, a comonomer mixture was prepared.

[0057] (2) Add 0.03% of the total mass of azobisisobutylamidine hydrochloride and 0.03% of 2,5-dimethyl-hexyl-(2,5)-bishydroperoxide to the above-mentioned comonomer mixture Initiate with 0.03% sodium bisulfite, the reaction temperature is 80° C., and the reaction time is 4 hours to obtain a gel-like thickener.

[0058] (3) The thickener is granulated, dried, pulverized and sieved to obtain dry thickener granules.

[0059] After measurement, the molecular weight of the gelling acid thickener is 5.8 million, and the particle size of the particles is 110-160 μm.

[0060] The rheological curve of gelling acid...

Embodiment 3

[0062] Embodiment 3: Preparation of gelled acid thickener.

[0063] (1) To a certain amount of deionized water, add 25% acrylamide, 0.3% N-hexadecyl acrylamide, 4% N,N-dimethylaminoethyl methacrylate, 0.05% Disodium edetate and 0.05% urea were stirred and dissolved, and after being filled with nitrogen for 30 minutes, a comonomer mixture was obtained.

[0064] (2) Add 0.05% of the total mass of azobisisobutylamidine hydrochloride and 0.05% of 2,5-dimethyl-hexyl-(2,5)-bishydroperoxide to the above-mentioned comonomer mixture Initiate with 0.05% sodium bisulfite, the reaction temperature is 80° C., and the reaction time is 4.5 hours to obtain a gel-like thickener.

[0065] (3) The thickener is granulated, dried, pulverized and sieved to obtain dry thickener granules.

[0066] After measurement, the molecular weight of the gelled acid thickener is 6.9 million, and the particle size is 120-175 μm.

[0067] The rheological curve of gelling acid prepared by dissolving 1% of the a...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a hydrophobically associated gelled acid thickening agent and a preparation method thereof. The gelled acid thickening agent is a copolymer of three monomers of acrylamide, a hydrophobically associated monomer and a cationic monomer. The gelled acid thickening agent has the advantages of short swelling time, good temperature-resistant, salt-resistant and shearing-resistant performances, good compatibility, good thermal stability, high residual acid flowback efficiency, low cost, etc., and can meet the more and more harsh requirements of a construction site.

Description

technical field [0001] The invention relates to the technical field of acidizing and fracturing in oil and gas fields, in particular to a hydrophobic association gelling acid thickener and a preparation method thereof. Background technique [0002] Acid fracturing is the main technological measure for increasing production and injection of carbonate oil and gas reservoirs. Its main mechanism is to use acid liquid to dissolve soluble pollutants in the formation pores and soluble minerals in the formation rocks, thereby improving the permeability of the formation. The development of gelled acid thickener is the key to improve the properties of gelled acid. Synthesizing a gelling acid thickener with short swelling time, good temperature and salt resistance, shear resistance, good compatibility, good thermal stability and low cost is the current research focus at home and abroad. However, domestic gelled acid thickeners generally have defects such as long swelling time, poor co...

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): C08F220/56C08F226/02C08F220/34C08F4/40C09K8/74
Inventor 杜涛姚奕明蒋廷学陈作张旭东徐胜强周健
Owner CHINA PETROLEUM & CHEM CORP
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