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

AM/NAI/APEG (Acrylamide/N-Allylimidazole/Allyl Alcohol Polyoxyethylene Ether) polymer clay stabilizer and preparation method

A clay stabilizer and polymer technology, which is applied in the field of polymer clay stabilizer and its synthesis, can solve the problems of mud shale hydration, high temperature resistance, and insufficient stability of high salt, and achieve rigidity increase, viscosity and resistance Increased temperature and enhanced stabilizing effect

Inactive Publication Date: 2013-01-30
SOUTHWEST PETROLEUM UNIV
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the above different types of clay stabilizers are copolymers of acrylamide (AM) and special functional monomers. Although they all have a certain ability to stabilize clay to a certain extent, they are effective in inhibiting shale hydration and It shows certain deficiencies in the stability of high temperature and high salt

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
  • AM/NAI/APEG (Acrylamide/N-Allylimidazole/Allyl Alcohol Polyoxyethylene Ether) polymer clay stabilizer and preparation method
  • AM/NAI/APEG (Acrylamide/N-Allylimidazole/Allyl Alcohol Polyoxyethylene Ether) polymer clay stabilizer and preparation method
  • AM/NAI/APEG (Acrylamide/N-Allylimidazole/Allyl Alcohol Polyoxyethylene Ether) polymer clay stabilizer and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 7.0g of imidazole into the reactor, dissolve it with tetrahydrofuran as a solvent, add 2.7g of NaH as a catalyst, slowly add 14.0g of allyl bromide dropwise under continuous stirring, the reaction temperature is 0°C, and the reaction time is 7h. After the reaction, slowly add a large amount of distilled water , distilled under reduced pressure, extracted with ethyl acetate solvent, washed with saturated brine, dried and filtered, and distilled the solvent under reduced pressure to obtain N-allylimidazole as a light yellow liquid (yield 99%).

[0023] The synthesis of embodiment 2 ternary copolymerization AM / NAI / APEG

Embodiment 2

[0024] Add 0.0468g of NAI prepared above into a 250ml three-necked flask according to the ratio in Table 1, then add AM, APEG, and emulsifier OP-10 to make an aqueous solution with a concentration of 10-20% of the total monomer mass, and pass nitrogen gas for 30 minutes ; Then add initiator ammonium persulfate solution and sodium bisulfite solution, the molar ratio of ammonium persulfate and sodium bisulfite is 1:1, the amount of initiator added is 0.1-0.5% of the total mass of the monomer, continue to feed nitrogen 10-20min, react at a temperature of 30-60°C for 4-10h; finally wash three times with absolute ethanol, pulverize and dry to obtain AM / NAI / APEG terpolymer.

[0025] Table 1 Addition amount of ternary polymer synthetic drugs

[0026]

[0027] Embodiment 3: AM / NAI / APEG copolymer structural characterization

Embodiment 3

[0028] The infrared spectrogram of the terpolymer AM / NAI / APEG synthesized by embodiment 2 is as follows figure 1 shown. It is known from the figure that the hydroxyl O-H stretching vibration is divided into 3400cm -1 .N-H (-NH2) stretching vibration peak at 3200cm -1 .C=O stretching vibration peak at 1659cm -1 at 1180cm -1 、1453cm -1 It is the vibration of the aromatic ring skeleton of the imidazole ring, 1112cm -1 It is the stretching vibration peak of ether C-O-O.

[0029] Example 4 Effect of ternary copolymerization AM / NAI / APEG solution on montmorillonite crystal spacing

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 an AM / NAI / APEG (Acrylamide / N-Allylimidazole / Allyl Alcohol Polyoxyethylene Ether) polymer clay stabilizer for inhibiting clay hydration in a well drilling process and a synthesis method thereof. The technical scheme provided by the invention is that the used monomer comprises the following components in percentage by mass: 88.5-94.8 percent of acrylamide (AM), 0.2-1.5 percent of N-allylimidazole (NAI) and 5-10 percent of allyl alcohol polyoxyethylene ether (APEG). The preparation method comprises the following steps of: adding 10 g of AM, 0.05 g of NAI and 2 g of APEG into a reactor of 250 m to prepare aqueous solution with monomer total mass percentage concentration of 10-20 percent; adjusting pH (Potential of Hydrogen) to be 2-3 by using hydrochloric acid; introducing nitrogen for 20 minutes, wherein the molar ratio of ammonium persulphate to sodium hydrogensulfite is 1:1, and the amount of added initiator is 0.1-0.5 percent of the total mass of the monomer; continuously introducing nitrogen for 10 minutes; reacting at the temperature of 30-70 DEG C for 4-12 hours; and finally washing for three times by using absolute ethanol, crushing and drying to prepare AM / NAI / APEG terpolymer. The indentation hardness of clay shale reaches up to 416.92 MPa by compounding the polymer with 10 percent KCl, and the dendrite arm spacing of sodium montmorillonite can be reduced to 14.96767 angstroms by compounding with 2 percent KCl.

Description

technical field [0001] The invention relates to a polymer clay stabilizer for suppressing clay hydration expansion in oilfield drilling and development processes and a synthesis method thereof. technical background [0002] During the drilling process, 75% of the formation encountered is mud shale, and mud shale wall instability accounts for more than 90% of the entire well wall instability. Studies have shown that clay is the main component of shale, and under the action of the external water environment, the hydration expansion of clay is the main reason for reducing the mechanical strength of shale and causing engineering problems. In engineering, it is generally used to add clay stabilizer to the working fluid to inhibit the hydration of clay, so as to slow down and inhibit the reduction of rock strength and ensure the stability of the well wall (Liu Xiangjun, Liu Hong, etc. Drilling fluid immersion has a negative effect on the mudstone of the Kuqa Formation. Influence ...

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
IPC IPC(8): C08F290/06C08F220/56C08F226/06C09K8/035
Inventor 刘向君刘锟苟绍华叶仲斌梁利喜周龙涛
Owner SOUTHWEST PETROLEUM UNIV
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