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Inorganic-organic polymer treatment agent for drilling fluid and preparation method therefor

A treatment agent and drilling fluid technology, which is applied in the field of synthesis and preparation of water-soluble polymer materials, can solve the problems that the treatment agent no longer faces the difficulties of temperature resistance and salt resistance, temperature resistance and salt resistance, etc., achieve good protection effect and control hydration The effect of dispersion and wide source of raw materials

Active Publication Date: 2016-02-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in recent decades, the research and development of drilling fluid treatment agents has been mainly carried out along the fixed model of organic polymers, and its temperature and salt resistance has become a difficulty in the development of treatment agents
However, if the research and development ideas are placed on inorganic compounds, the treatment agent will no longer face the main problem of temperature resistance and salt resistance due to the characteristics of inorganic compounds.

Method used

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  • Inorganic-organic polymer treatment agent for drilling fluid and preparation method therefor
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  • Inorganic-organic polymer treatment agent for drilling fluid and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Add 13 kg of sodium hydroxide and 170 kg of water into the neutralization kettle, add 20 kg of aluminum-magnesium silicate inorganic gel after it is completely dissolved, and grind it with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, and slowly add 25 kg of 2-acryloyloxy-2-methylpropanesulfonic acid and 18 kg of methacrylic acid under the condition that the temperature does not exceed 35 ° C, and continue to stir after the addition is complete 15 minutes. Add 40 kg of N,N-dimethylacrylamide, and continue to stir for 25 minutes after the addition, to obtain a reaction mixture.

[0020] 2) Add the reaction mixture obtained in step 1) into the polymerization tank, stir for 10 minutes, and adjust the pH value of the system to 8.5 with 10% sodium hydroxide solution by mass fraction. Add 0.35 kg of potassium persulfate and 0.5 kg of sodium metabisulfite (an aqueous solution prepared with an appropriate amount of water), stir fo...

Embodiment 2

[0022] 1) Add 20 kg of sodium hydroxide and 112 kg of water into the neutralization kettle, add 12.5 kg of aluminum-magnesium silicate inorganic gel after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, slowly add 65 kg of acryloyloxybutanesulfonic acid and 25 kg of itaconic acid under the condition that the temperature does not exceed 35°C, and continue stirring for 25 minutes after the addition is complete. Add 40 kg of acrylonitrile and continue stirring for 20 minutes after the addition to obtain a reaction mixture.

[0023] 2) Add the reaction mixture obtained in step 1) into the polymerization tank, stir for 8 minutes, and adjust the pH value of the system to 10.0 with a 20% mass fraction of sodium hydroxide solution. Add 0.8 kilograms of potassium persulfate and 1.6 kilograms of sodium thiosulfate (aqueous solution prepared with an appropriate amount of water), stir for about 8 minutes and st...

Embodiment 3

[0025] 1) Add 10.4 kg of sodium hydroxide and 150 kg of water into the neutralization kettle, add 12.5 kg of aluminum-magnesium silicate inorganic gel and 2.5 kg of bentonite after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid into the reaction kettle, and slowly add 28 kg of 2-acrylamide-2-phenylethanesulfonic acid and 13 kg of methacrylic acid under the condition that the temperature does not exceed 35°C, and continue to stir for 20~ 25 minutes. Add 83 kg of isobutylacrylamide, and continue stirring for 25 to 30 minutes after the addition, to obtain a reaction mixture;

[0026] 2) Add the reaction mixture obtained in step 1) into the polymerization tank, stir for 5-10 minutes, and adjust the pH value of the system to 11 with a sodium hydroxide solution with a mass fraction of 10%-40%. Add 0.25 kg of sodium persulfate and 0.5 kg of sodium metabisulfite (an aqueous solution prepared with an appropriate amount of water),...

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Abstract

The present invention provides an inorganic-organic polymer treatment agent for a drilling fluid, wherein the treatment agent is polymerized and formed by a sulfonic acid monomer, a carboxylic acid monomer, a nonionic monomer and inorganic material under the action of an initiator; and the inorganic material contains an aluminum-magnesium silicate inorganic gel. The inorganic-organic polymer treatment agent provided by the present invention has a relative strong reduction fluid loss effect in a fresh water drilling fluid, a saline water drilling fluid, a saturated saline water drilling fluid and a composite saline water drilling fluid, and further has a relative strong collapse prevention capability to control hydration and dispersion of mud shale and clay mud-making effectively. The recover value of permeability is high. The treatment agent has a relatively good hydrocarbon reservoir protecting effect. The inorganic-organic polymer treatment agent is simple in production process, wide in raw material sources, and vast in popularizing prospect. The present invention further provides a preparation method for the inorganic-organic polymer treatment agent for the drilling fluid.

Description

technical field [0001] The invention relates to an inorganic-organic monomer polymer treatment agent for drilling fluid and a preparation method thereof, belonging to the technical field of synthesis and preparation of water-soluble polymer materials. Background technique [0002] Since the 1980s, the number of deep wells, ultra-deep wells, and complex wells drilled in various countries in the world has increased, which puts forward higher requirements for drilling fluid technology. Drilling fluid technology must not only meet the requirements of traditional functions, but also meet the requirements of the environment, Requirements for oil layer protection, increasing drilling speed, reducing comprehensive drilling cost, etc. are developing towards the goal of economy, safety and efficiency. The original drilling fluid treatment agents can no longer fully meet the needs of the development of drilling fluid technology, all countries in the world are working hard to develop ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C08F220/54C08F220/58C08F220/06C08F220/38C08F222/02C08F220/46C08F2/44
Inventor 杨小华王中华林永学王琳蔡利山
Owner CHINA PETROLEUM & CHEM CORP
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