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

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 difficulty 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 simple production process

Active Publication Date: 2015-12-16
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 processing agent for drilling fluid and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] 1) Add 22.8 kg of potassium hydroxide and 130 kg of water into the neutralization kettle, add 21 kg of bentonite after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, and slowly add 48 kg of 2-acrylamide dodecylsulfonic acid and 18 kg of acrylic acid under the condition that the temperature does not exceed 35°C, and continue stirring for 10 to 15 minutes after the addition is complete. Add 55 kg of N,N-dimethylacrylamide, and continue to stir for 25 to 30 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 5-10 minutes, and adjust the pH value of the system to 10.5 with a sodium hydroxide solution with a mass fraction of 10%-40%. Add 0.6 kg of sodium persulfate and 1.2 kg of ferrous sulfate (an aqueous solution prepared with an appropriate amount of water), stir for about 9 minutes and then st...

Embodiment 2

[0022] 1) Add 14 kg of sodium hydroxide and 160 kg of water into the neutralization kettle, add 18 kg of bentonite after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, and slowly add 20.8 kg of acryloyloxybutanesulfonic acid and 29 kg of maleic acid under the condition that the temperature does not exceed 35 ° C, and continue stirring for 15 to 25 minutes after the addition is complete. Add 26.5 kg of acrylonitrile, and continue to stir for 25 to 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 5-10 minutes, and adjust the pH value of the system to 11.0 with a sodium hydroxide solution with a mass fraction of 10%-40%. Add 0.35 kg of sodium persulfate and 0.7 kg of ferrous chloride (an aqueous solution prepared with an appropriate amount of water), stir for about 5 to 15 minutes and then stand...

Embodiment 3

[0025] 1) Add 35 kg of potassium bicarbonate and 150 kg of water into the neutralization kettle, add 14 kg of bentonite and 3.5 kg of aluminum tripolyphosphate after being completely dissolved, and grind with a colloid mill after stirring evenly. Add the ground mixture into the reaction kettle, slowly add 20.8 kg of 2-acryloyloxy-2-methylpropanesulfonic acid and 32.5 kg of itaconic acid under the condition that the temperature does not exceed 35°C, and continue stirring after the addition is complete 15-20 minutes. Add 49.5 kg of N,N-dimethylacrylamide, and continue stirring for 15 to 20 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 8.5 with a sodium hydroxide solution with a mass fraction of 10%-40%. Add 0.35 kg of ammonium persulfate and 0.7 kg of sodium metabisulfite (an aqueous solution prepared with an appropri...

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Abstract

The invention provides an inorganic-organic polymer processing agent for drilling fluid polymerized from sulfonic acid monomer, carboxylic acid monomer, nonionic monomer and inorganic material in the presence of initiator, and the inorganic material includes bentonite. The inorganic-organic polymer processing agent for drilling fluid has good effect on filtration reduction effect in fresh water drilling fluid, brine drilling fluid, saturated brine drilling fluid and compound brine drilling fluid. The inorganic-organic polymer processing agent for drilling fluid has strong anti-sloughing capability and high permeability recovery, can control hydration and dispersion of the shale effectively, can control mud making of the clay effectively, and has good effect on hydrocarbon reservoir protection. Moreover, the preparation method is simple, the sources of raw materials are wide, and the promotion prospect is wide. The invention also provides a preparation method of inorganic-organic polymer processing agent for 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): C09K8/03C08F220/58C08F220/06C08F220/54C08F222/02C08F220/38C08F220/46C08F220/56C08K3/34
Inventor 杨小华王中华林永学王琳蔡利山
Owner CHINA PETROLEUM & CHEM CORP
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