Unlock instant, AI-driven research and patent intelligence for your innovation.

Dual-core copolymerized clay stabilizer and preparation method thereof

A clay stabilizer and copolymerization technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of large influence, inability to achieve, poor comprehensive performance, etc. Clay hydration expansion, good mutual coordination effect

Active Publication Date: 2014-12-10
大庆奥斯贝森化工科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of reservoir conditions, the so-called high-permeability reservoirs may also have permeability in the range of tens to thousands of millidarcy, so if high molecular weight clay stabilizers are used for such reservoirs, Inevitably cause damage to the reservoir and cannot play its due role
[0004] The clay stabilizers currently used have poor selectivity, cannot achieve good compounding properties with the injected liquid, and have high cost, and relatively single performance. Only liquid system can be applied in the field, the application effect is not ideal, and it is greatly affected by the external environment

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
  • Dual-core copolymerized clay stabilizer and preparation method thereof
  • Dual-core copolymerized clay stabilizer and preparation method thereof
  • Dual-core copolymerized clay stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The compound structural formula of binuclear copolymerization clay stabilizer provided by the invention is:

[0021]

[0022] In the formula, x:y is 1-10.

Embodiment 2

[0025] The preparation method of binuclear copolymerization clay stabilizer of the present invention, concrete operation steps are as follows:

[0026] a. Propyl alcohol polyoxyethylene ether and (3-acrylamidopropyl) trimethylammonium chloride are added to the solvent in a molar ratio of 1:1 to 10, and the mass ratio of the reactant to the solvent is 1: 1~5;

[0027] b. Pass high-purity nitrogen into the above-mentioned substances, and exhaust oxygen;

[0028] c. Heat the product obtained in step b, and raise the temperature to 50-90°C; add the catalyst in an amount of: the mass ratio to the reactant is 0.002-0.02:1, and the mass ratio of ammonium persulfate and sodium sulfite in the catalyst is 0.5~5.0:1, continuous reaction for 2~5 hours;

[0029] d. Detect the molecular weight of the reaction product during the reaction in step c. When the molecular weight is 8,000 to 15,000, add the polymerization inhibitor hydroquinone, the amount of which is: the mass ratio to the reac...

Embodiment 3

[0033] (l) Add 50ml of deionized water into a 250ml three-necked flask, and simultaneously add 45.4g of acryl alcohol polyoxyethylene ether and 20.6g of (3-acrylamidopropyl) trimethylammonium chloride;

[0034] (2) Stir and pass high-purity nitrogen into the system for 5 to 15 minutes;

[0035] (3) Dissolve 0.5 g of ammonium persulfate and 0.3 g of sodium sulfite in 10 ml of deionized water in a 50 ml beaker and add them to a three-necked flask;

[0036] (4) Heat up to 70°C, add the catalyst prepared in (3) at this temperature, stir for 2 to 5 hours, detect the molecular weight of the reaction product during the reaction, when the molecular weight is 8000 to 15000, then add 0.1 to Hydroquinone stops the reaction, and after the reaction is completed, a binuclear copolymer clay stabilizer is obtained;

[0037] (5) Aging for 1h, purification, to obtain the compound shown in the structural formula, x:y=1:1

[0038] The molecular weight of the compound is 8000-15000.

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 a dual-core copolymerized clay stabilizer and a preparation method of the dual-core copolymerized clay stabilizer, relating to the field of oil extraction of oilfield. The preparation method comprises the following steps of: respectively adding polyoxyethylene allyl ether and (3-acrylamide propyl) trimethyl ammonium chloride into a solvent, wherein the mole ratio of the reactants is 1:1-10, and the weight ratio of the reactants and the solvent is 1:1-5; introducing high-purity nitrogen to the mixture; heating the obtained product to 50-90 DEG C; adding a catalyst, wherein the weight ratio of the catalyst and the reactants is 0.002-0.02:1, reacting for 2-5 hours continuously; detecting the molecular weight of a reaction product in the reaction process, while the molecular weight of the reaction product is 8000-15000, and adding the hydroquinone as a polymerization inhibitor, wherein the weight ratio of hydroquinone with the reactants is 0.0005-0.005:1; thereby obtaining the dual-core copolymerized clay stabilizer. The clay stabilizer provided by the invention has stronger effect on preventing clay expansion. The molecular weight of the product is controlled by controlling the reaction condition, and in practical application, the clay stabilizers with different molecular weights can be synthesized according to different oil reservoir conditions and different application environments to meet the demands of oil reservoirs with different permeabilities.

Description

technical field [0001] The invention relates to a dual-core copolymer clay stabilizer used in the field of oil recovery and a preparation method thereof, in particular to a clay stabilizer suitable for reservoirs with different permeability, an intermediate thereof and a preparation method thereof. Background technique [0002] In the process of oilfield development, from drilling, well completion, acidizing, fracturing to water injection development, each process will have foreign fluids in contact with formation clay minerals, which contain a certain amount of clay minerals such as kaolinite, montmorillonite, illite and green Clay minerals such as mudstone, these clay minerals are mostly composed of silicon-oxygen tetrahedrons and aluminum-oxygen octahedrons in a layered structure. When clay minerals are in contact with water, water can enter between the crystal layers of clay minerals, and the exchangeable cations on the surface of the crystal layers dissociate and diffus...

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 Patents(China)
IPC IPC(8): C09K8/575C08F290/06C08F220/60
Inventor 段华生于婷胡云峰王彦伟
Owner 大庆奥斯贝森化工科技有限公司