Multifunctional clay stabilizer

A clay stabilizer and multi-functional technology, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of increasing the on-site liquid preparation process, the single performance of chemical additives, reducing the construction efficiency, etc., and reducing the preparation cost. Low, improve the accuracy of liquid dispensing, reduce the effect of labor intensity

Active Publication Date: 2017-05-31
DAQING BEIHUA CHEM PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of experiments have shown that the performance of the chemical additives used in fracturing and acidizing is single, which not only increases the on-site liquid preparation process, reduces the construction efficiency, but also increases the construction cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this example, a multifunctional clay stabilizer for fracturing was developed, which was prepared through the following steps:

[0022] Step 1. Place the reaction bottle equipped with a stirrer, reflux condenser and thermometer in a constant temperature water bath, then heat the water contained in the constant temperature water bath to 45°C, and feed into the reflux condenser with a temperature not higher than Condensation water at 5°C, and then add allyl chloride with a mass purity of not less than 94% and an aqueous solution of dimethylamine with a concentration of 40wt% to the reaction flask, stir well and then add KOH aqueous solution with a concentration of 30wt% dropwise to make the reaction The pH value of the system was maintained at 8, and the time for adding the KOH aqueous solution was controlled within 10 minutes. After the KOH aqueous solution was added dropwise, it was stirred and reacted for 4 hours to obtain a mixed solution A; the mass ratio of the all...

Embodiment 2

[0028] In this example, a multifunctional clay stabilizer for fracturing was developed, which was prepared through the following steps:

[0029] Step 1. Place the reaction bottle equipped with a stirrer, reflux condenser and thermometer in a constant temperature water bath, then heat the water contained in the constant temperature water bath to 43°C, and feed into the reflux condenser with a temperature not higher than Condensation water at 5°C, and then add allyl chloride with a mass purity of not less than 94% and an aqueous solution of dimethylamine with a concentration of 40wt% to the reaction flask, stir evenly, and then dropwise add a KOH aqueous solution with a concentration of 25wt% to make the reaction system The pH value of the solution is maintained at 9, and the dropwise addition time of the KOH aqueous solution is controlled within 10min. After the KOH aqueous solution is added dropwise, the stirring reaction is carried out for 3h to obtain the mixed solution A; th...

Embodiment 3

[0037] In this example, a multifunctional clay stabilizer for fracturing was developed, which was prepared through the following steps:

[0038]Step 1. Place the reaction bottle equipped with a stirrer, reflux condenser and thermometer in a constant temperature water bath, then heat the water contained in the constant temperature water bath to 47°C, and feed into the reflux condenser with a temperature not higher than Condensation water at 5°C, and then add allyl chloride with a mass purity of not less than 94% and an aqueous solution of dimethylamine with a concentration of 40wt% into the reaction flask, stir evenly, and then dropwise add a KOH aqueous solution with a concentration of 30wt% to make the reaction system The pH value of the solution is maintained at 7, and the dropwise addition time of the KOH aqueous solution is controlled within 10min. After the KOH aqueous solution is added dropwise, the stirring reaction is carried out for 4h to obtain the mixed solution A; t...

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Abstract

The invention provides a multifunctional clay stabilizer. The multifunctional clay stabilizer is prepared through the following steps: 1, performing stirring reaction on allyl chloride and a dimethylamine water solution under the conditions that the pH value is 7-9 and the temperature is 40-50 DEG C for 3-4 hours to obtain a mixed solution A; 2, adding an AMPS (2-acrylamido-methylpropanesulfonic acid) water solution into the mixed solution A, dropwisely adding initiator, reacting under the condition that the temperature is 75-80 DEG C, and diluting with water to obtain a solution B; 3, stirring and uniformly mixing active aid, isopropanol and water to obtain a solution C; and 4, uniformly mixing the solution B and the solution C according to a mass ratio of 1:1 to obtain the multifunctional clay stabilizer. The clay stabilizer provided by the invention not only has a high-efficiency anti-swelling effect, but also has a discharge aid effect at the same time, so that the original single function (clay anti-swelling) is changed into multiple functions and high efficiency (anti-swelling and discharge aiding).

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a multifunctional clay stabilizer. Background technique [0002] The purpose of drilling and completion is mainly to develop oil and gas layers, form oil and gas seepage channels, and establish good oil and gas production conditions. Any additional factors that hinder the flow of oil and gas into the bottom of the production well are called pollution or damage of oil and gas reservoirs. In every process of drilling and completion and other production stimulation measures, oil and gas reservoirs may be damaged, thereby greatly reducing the efficiency of oil and gas production. [0003] Clay minerals contained in oil and gas reservoirs mainly include kaolinite, montmorillonite, illite and chlorite. These clay minerals will swell when encountering foreign water or water-based substances during drilling, water injection, acidizing and fracturing, and then...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C09K8/60
CPCC09K8/602C09K8/608C09K8/725C09K8/74C09K2208/12
Inventor 王满学
Owner DAQING BEIHUA CHEM PLANT
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