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

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

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

Examples

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 aluminum tripolyphosphate 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, control the init...

Embodiment 2

[0022] 1) Add 19.4 kg of sodium hydroxide and 150 kg of water into the neutralization kettle, add 32 kg of aluminum tripolyphosphate after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, slowly add 70 kg of 2-acrylamide-2-methylpropanesulfonic acid and 18 kg of maleic acid under the condition that the temperature does not exceed 35 °C, and continue to stir for 15 minutes after the addition is complete . Add 40 kg of acrylamide, and continue stirring for 15 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 9.5 with a 20% mass fraction of sodium hydroxide solution. Add 0.8 kilograms of potassium persulfate and 1.6 kilograms of sodium metabisulfite (aqueous solution prepared with an appropriate amount of water), stir for about 8 minutes and stand s...

Embodiment 3

[0025] 1) Add 10.4 kg of sodium hydroxide and 150 kg of water into the neutralization kettle, add 15 kg of aluminum tripolyphosphate after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to 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 minutes after the addition is complete . Add 83 kg of isobutylacrylamide, and continue stirring for 25 minutes after the addition is complete to obtain a reaction mixture.

[0026] 2) Add the reaction mixture obtained in step 1) into the polymerization tank, stir for 6 minutes, and adjust the pH value of the system to 11 with 20% sodium hydroxide solution by mass fraction. Add 0.25 kg of sodium persulfate and 0.5 kg of sodium metabisulfite (aqueous solution prepared with an appropriate amount of water), stir for about 6 minutes and...

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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 aluminium tripolyphosphate. 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 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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