A temperature-resistant and salt-resistant anti-swelling clay stabilizer and preparation method thereof

A clay stabilizer, heat-resistant and salt-resistant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature and salt resistance of clay stabilizers, reduction of formation permeability, and limited application range, etc. Achieve good compatibility, strong reservoir adaptability and low cost

Active Publication Date: 2022-03-29
山东滨州昱诚化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stabilizer is easy to adsorb to the rock surface, reducing the permeability of the formation, or directly blocking the formation. At the same time, the temperature and salt resistance of the clay stabilizer is poor, which limits its application range

Method used

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  • A temperature-resistant and salt-resistant anti-swelling clay stabilizer and preparation method thereof
  • A temperature-resistant and salt-resistant anti-swelling clay stabilizer and preparation method thereof
  • A temperature-resistant and salt-resistant anti-swelling clay stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: anti-swelling clay stabilizer C 1 and its preparation method

[0031] (1) Anti-swelling clay stabilizer C 1 The composition and components are as follows:

[0032]

[0033] According to existing literature, the synthetic route of described soybean oil modified surfactant is as follows:

[0034]

[0035] Where: R" is C n h 2n+1 , 0≤n≤15; R' is C m h 2m+1 , 0≤m≤15.

[0036] (2) Anti-swelling clay stabilizer C 1 The preparation method is as follows:

[0037] ①Put 80 parts of water in a beaker and heat it in a constant temperature water bath at 50°C; add 0.01 part of amino carboxylic acid resin at a stirring rate of 220 rpm, and continue stirring for 10 minutes to obtain a mixed solution;

[0038] ② Adjust the temperature of the above mixed solution to 20°C, slowly add 0.1 part of ammonium sulfate at a stirring rate of 300rpm, and continue stirring for 18 minutes after it is completely added; then raise the temperature to 55°C, and keep the tem...

Embodiment 2

[0040] Embodiment 2: anti-swelling clay stabilizer C 2 and its preparation method

[0041] (1) Anti-swelling clay stabilizer C 2 The composition and components are as follows:

[0042]

[0043] According to existing literature, the synthetic route of described soybean oil modified surfactant is as follows:

[0044]

[0045] Where: R" is C n h 2n+1 , 0≤n≤15; R' is C m h2m+1 , 0≤m≤15.

[0046] (2) Anti-swelling clay stabilizer C 2 The preparation method is as follows:

[0047] ①Put 90 parts of water in a beaker and heat it in a constant temperature water bath at 55°C; add 0.03 parts of amino carboxylic acid resin at a stirring rate of 230 rpm, and continue stirring for 12 minutes to obtain a mixed solution;

[0048] ② Adjust the temperature of the above mixed solution to 30°C, slowly add 0.3 parts of ammonium sulfate at a stirring rate of 500rpm, and continue stirring for 16 minutes after adding it completely; then raise the temperature to 58°C, and keep the tempe...

Embodiment 3

[0050] Embodiment 3: anti-swelling clay stabilizer C 3 and its preparation method

[0051] (1) Anti-swelling clay stabilizer C 3 The composition and components are as follows:

[0052]

[0053] According to existing literature, the synthetic route of described soybean oil modified surfactant is as follows:

[0054]

[0055] Where: R" is C n h 2n+1 , 0≤n≤15; R' is C m h 2m+1 , 0≤m≤15.

[0056] (2) Anti-swelling clay stabilizer C 3 The preparation method is as follows:

[0057] ①Put 85 parts of water in a beaker and heat it in a constant temperature water bath at 60°C; add 0.05 parts of amino carboxylic acid resin at a stirring rate of 200 rpm, and continue stirring for 14 minutes to obtain a mixed solution;

[0058] ② Adjust the temperature of the above mixed solution to 25°C, slowly add 0.4 parts of ammonium sulfate at a stirring rate of 400rpm, and continue stirring for 15 minutes after adding it completely; then raise the temperature to 62°C, and keep the tem...

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Abstract

The invention belongs to the technical field of oil field development, and specifically relates to a temperature-resistant and salt-resistant anti-swelling clay stabilizer and a preparation method thereof. The anti-swelling clay stabilizer is composed of soybean oil modified surfactant, amino carboxylic acid resin, Ammonium sulfate and water are compounded; wherein, the soybean oil modified surfactant is a quaternary ammonium salt surfactant with a long carbon chain alkyl group and a quaternary ammonium cation. The anti-swelling clay stabilizer of the present invention has the characteristics of wide source of raw materials, simple synthesis process, less dosage, and strong adaptability to oil reservoirs; meanwhile, it has good heat and salt resistance, can withstand temperatures up to 280°C, and can resist salinity up to 230,000mg / L, and has good compatibility with formation water, high anti-swelling rate, and the anti-swelling rate reaches more than 98.0%. Therefore, the present invention can be widely applied to the technical field of oil field exploitation.

Description

technical field [0001] The invention belongs to the technical field of oil field exploitation, and in particular relates to a temperature-resistant and salt-resistant anti-swelling clay stabilizer and a preparation method thereof. Background technique [0002] Most low-permeability oil and gas reservoirs contain clay minerals, some of which are deposited by clastic clay, and some of them are formed under the long-term action of heat and pressure, and some of them are formed when water flows through the bedrock. , formed by authigenic clay deposits. Through extensive investigations on the importance of these minerals in oil and gas production and their hazards to permeability, it is generally believed that clay swelling and clay migration are two important factors for these minerals to impair reservoir permeability. During the swelling process, the clay absorbs water into the crystal structure, resulting in an increase in the volume of the clay, thereby blocking the formatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/03C09K8/035C09K2208/12
Inventor 张静孙海龙
Owner 山东滨州昱诚化工科技有限公司
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