Anti-swelling stabilizer for fracturing

A stabilizer and anti-swelling technology, which is applied in the field of preparation of chemical products in oil and gas fields, can solve the problems of ineffective clay migration prevention, poor temperature resistance and anti-swelling performance, and inability to produce multi-point adsorption, and achieves enhanced binding force and high efficiency. Anti-swelling performance, the effect of preventing hydration and dispersion

Inactive Publication Date: 2017-11-07
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are many kinds of anti-swelling stabilizers commonly used at present, which can be divided into two categories: inorganic compounds and organic compounds. The former, such as potassium chloride, zirconium oxychloride, polyhydroxy aluminum chloride, etc., has the advantages of wide supply and low price, but Disadvantages are large dosage, short validity period, poor anti-swelling performance, can not produce multi-point adsorption, has no obvious effect on preventing clay migration, and is not suitable for carbonate rock formations; the latter such as polyquaternium and modified polyquaternium , cationic polyacrylamide, etc., which have the advantage of less dosage and longer validity period, but the disadvantage is poor temperature resistance and is only effective in weak acid environment, and the anti-swelling performance still needs to be improved

Method used

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  • Anti-swelling stabilizer for fracturing

Examples

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Embodiment 1

[0013] An anti-swelling stabilizer for fracturing, comprising the following components by mass percentage: 25% polydimethyldiallyl ammonium chloride, 10% sodium chloride, and 5% alkylphenol polyoxyethylene ether and water 60%.

[0014] The preparation process of the anti-swelling stabilizer for above-mentioned fracturing is specifically as follows: after adding 60 g of water, 25 g of polydimethyldiallyl ammonium chloride, and 5 g of alkylphenol polyoxyethylene ether into a stirred reactor, Raise the temperature to 70°C for 1 hour, then cool to room temperature, then add 10 g of sodium chloride, stir for 1 hour to obtain an anti-swelling stabilizer.

Embodiment 2

[0016] An anti-swelling stabilizer for fracturing, comprising the following components by mass percentage: 28% polytrimethylallyl ammonium chloride, 15% potassium chloride, dodecyl dimethyl benzyl chloride Ammonium chloride 10% and water 47%.

[0017] The preparation process of the anti-swelling stabilizer for above-mentioned fracturing is specifically as follows: add 47g water, 28g polytrimethylallyl ammonium chloride, 10g dodecyldimethylbenzyl chloride into a reactor with stirring After mixing the ammonium, raise the temperature to 60°C for 2 hours, then cool to room temperature, add 15 g of potassium chloride, stir for 1.5 hours to obtain an anti-swelling stabilizer.

Embodiment 3

[0019] An anti-swelling stabilizer for fracturing, comprising the following components by mass percentage: 30% poly 2-hydroxypropyl-1,1-N-dimethylammonium chloride, 13% potassium chloride, alkane Base phenol ethoxylate 5% and water 52%.

[0020] The preparation method of the above-mentioned anti-swelling stabilizer for fracturing, the specific process is as follows: add 52g water, 30g poly 2-hydroxypropyl-1,1-N-dimethylammonium chloride, 5g After the alkylphenol polyoxyethylene ether was mixed, the temperature was raised to 50°C for 3 hours, then cooled to room temperature, and 13 g of potassium chloride was added, and the anti-swelling stabilizer was obtained after stirring for 2 hours.

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Abstract

The invention relates to an anti-swelling stabilizer for fracturing. The anti-swelling stabilizer is prepared from an organic cationic polymer, inorganic salt, a solubilizer and water. The anti-swelling stabilizer can be directly added to a fracturing fluid for use during oil well and gas well fracturing operation. When the addition mass percentage of the anti-swelling stabilizer in the fracturing fluid is 0.5-1%, an anti-swelling rate of the anti-swelling stabilizer can reach above 90%. The anti-swelling stabilizer has high-efficiency anti-swelling performance and high-temperature resistance, is low in working concentration and low in cost, and has good compatibility with the fracturing fluid.

Description

technical field [0001] The invention belongs to the technical field of preparation of oil and gas field chemical products, and in particular relates to an anti-swelling stabilizer for fracturing of oil and gas wells. Background technique [0002] Fracturing and acidizing stimulation work are effective production stimulation measures in the process of oil and gas reservoir exploitation. When water-based fracturing is performed on the reservoir, the clay will expand and migrate, which can easily block the pores of the formation and reduce the permeability of the formation, thereby reducing the production of the oil well. In order to reduce the hydration swelling of clay minerals, anti-swelling stabilizers must be added to the fracturing fluid. [0003] There are many kinds of anti-swelling stabilizers commonly used at present, which can be divided into two categories: inorganic compounds and organic compounds. The former, such as potassium chloride, zirconium oxychloride, pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/66C09K8/68C09K8/88
CPCC09K8/665C09K8/68C09K8/882C09K8/885C09K2208/12
Inventor 王佳李俊华周渝李辰沈燕宾路建萍谢元李轶司伟
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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