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

A technology for treating agent and drilling fluid, which is applied in the field of synthesis and preparation of water-soluble polymer materials, can solve the difficulties of temperature resistance and salt resistance, and the treatment agent no longer faces the problems of temperature resistance and salt resistance, so as to achieve good protection effect and control hydration. The effect of dispersion and cost reduction

Active Publication Date: 2018-01-23
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 thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Add 14 kg of sodium hydroxide and 160 kg of water into the neutralization kettle, add 20 kg of lithium-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 30 kg of 2-acrylamide-2-methylpropanesulfonic acid and 15 kg of acrylic acid under the condition that the temperature does not exceed 35°C, and continue stirring for 10 minutes after the addition is complete. Add 55 kg of acrylamide, and continue stirring 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 5 minutes, and adjust the pH value of the system to 9.0 with 10% sodium hydroxide solution by mass fraction. Add 0.3 kg of ammonium persulfate and 0.5 kg of sodium bisulfite (aqueous solution prepared with an appropriate amount of water), stir for about 15 min and then stand still, c...

Embodiment 2

[0022] 1) Add 14 kg of sodium hydroxide and 170 kg of water into the neutralization kettle, add 20 kg of lithium-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 20 kg of acryloyloxybutanesulfonic acid and 18 kg of itaconic acid under the condition that the temperature does not exceed 35 °C, and continue stirring for 15 minutes after the addition is complete. Add 28 kg of acrylonitrile, and continue stirring for 30 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 10 minutes, and adjust the pH value of the system to 11.0 with a 40% mass fraction of sodium hydroxide solution. Add 0.35 kg of potassium persulfate and 0.7 kg of sodium metabisulfite (aqueous solution prepared with an appropriate amount of water), stir for about 10 minutes and stand still...

Embodiment 3

[0025] 1) Add 20 kg of potassium bicarbonate and 120 kg of water into the neutralization kettle, add 12.5 kg of lithium-magnesium silicate inorganic gel and 3.0 kg of attapulgite after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, and slowly add 65 kg of propane 2-acryloyloxy-2-methylpropanesulfonic acid and 25 kg of itaconic acid under the condition that the temperature does not exceed 35 °C, and continue to stir after the addition is complete 20 minutes. Add 40 kg of acrylonitrile, and continue stirring for 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 9 minutes, and adjust the pH value of the system to 10.0 with a 40% mass fraction of sodium hydroxide solution. Add 0.8 kg of ammonium persulfate and 0.7 kg of sodium metabisulfite (aqueous solution prepared with an appropriate amount of...

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Abstract

The invention provides an inorganic-organic polymer treating agent used for drilling fluid. The treating agent is prepared from a sulfonic acid monomer, a carboxylic acid monomer, a non-ionic monomer and an inorganic material by polymerization under the action of an initiator, wherein the inorganic material contains lithium magnesium silicate inorganic gel. The inorganic-organic polymer treating agent provided by the invention has strong effect of reducing filtrate loss in fresh-water drilling fluid, saltwater drilling fluid, saturated saltwater drilling fluid and compound saltwater drilling fluid. The treating agent also has strong anti-sloughing ability, can effectively control hydration dispersion of clay-shale and slurry making of clay, and has high permeability recovery rate and good hydrocarbon reservoir protection effects. Meanwhile, the treating agent has the advantages of simple production process, wide raw material sources and extensive popularization prospects. The invention also provides a preparation method for the inorganic-organic polymer treating agent used 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 Patents(China)
IPC IPC(8): C09K8/035C08F292/00C08F220/56C08F220/58C08F220/06C08F222/02C08F220/54
Inventor 杨小华王中华林永学王琳蔡利山
Owner CHINA PETROLEUM & CHEM CORP
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