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Zwitterionic inorganic-organic monomer polymer drilling fluid treatment agent and preparation method thereof

A drilling fluid treatment agent and amphoteric ion technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of insufficient inhibition of synthetic products, achieve good protection effect, high permeability recovery value, control water The effect of dispersion

Active Publication Date: 2019-08-23
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the technical problem of insufficient inhibition of synthetic products in the prior art, by introducing cationic monomers, on the premise of ensuring the fluid loss control performance of the polymer, further improve the inhibition and anti-slump ability of the polymer, and provide A zwitterionic inorganic-organic monomer polymer drilling fluid treatment agent

Method used

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  • Zwitterionic inorganic-organic monomer polymer drilling fluid treatment agent and preparation method thereof
  • Zwitterionic inorganic-organic monomer polymer drilling fluid treatment agent and preparation method thereof
  • Zwitterionic inorganic-organic monomer polymer drilling fluid treatment agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) 582ml of water and 166.2 grams of lithium magnesium silicate are ground into an inorganic hydrogel with a colloidal mill;

[0054] (2) Add 160 grams of sodium hydroxide and 750ml of water into the reactor, slowly add 1.8 moles of acrylic acid and 2.2 moles of 2-acrylamido-2-methylpropanesulfonic acid at 30°C, and continue Stir for 10-30 minutes. Then add the inorganic hydrogel prepared in step (1) and stir for 0.5 hour. After the stirring time is up, add 5.0 moles of acrylamide and 1.0 moles of 3-methacryloyloxy-2-hydroxypropyltrimethylammonium chloride, and continue stirring for 15 minutes after the addition to obtain a reaction mixture;

[0055] (3) Add the reaction mixture obtained in step (2) into the polymerization tank, stir for 5 minutes, and adjust the pH value of the system to 7 with a 25% mass fraction of sodium hydroxide solution. Nitrogen was passed for 5 minutes, 3.5 grams of ammonium persulfate and 3.5 grams of sodium bisulfite were added, and after ...

Embodiment 2

[0058] (1) 178ml of water and 59.6 grams of lithium magnesium silicate are ground into an inorganic hydrogel with a colloidal mill;

[0059] (2) Add 120 grams of sodium hydroxide and 617 ml of water into the reactor, slowly add 0.5 moles of acrylic acid and 2.5 moles of 2-acrylamido-2-methylpropanesulfonic acid at 28 ° C, add Continue stirring for 25 minutes after completion. Then add the inorganic hydrogel prepared in step (1) and stir for 1 hour. After the stirring time is up, add 6.5 moles of acrylamide and 0.5 moles of 3-methacryloyloxy-2-hydroxypropyltrimethylammonium chloride, and continue stirring for 25 minutes after the addition to obtain a reaction mixture;

[0060] (3) Add the reaction mixture obtained in step (2) into the polymerization tank, stir for 8 minutes, and adjust the pH value of the system to 8 with a 30% mass fraction of sodium hydroxide solution. Nitrogen was passed for 25 minutes, 1.7 g of ammonium persulfate and 1.7 g of sodium bisulfite were added,...

Embodiment 3

[0062] (1) 1800ml of water and 359.6 grams of aluminum-magnesium silicate inorganic gel are ground into an inorganic hydrogel with a colloid mill;

[0063] (2) Add 200 grams of sodium hydroxide and 1556 ml of water into the reactor, slowly add 4 moles of acrylic acid and 1 mole of 2-acrylamido-2-methylpropanesulfonic acid at 20 ° C, add Continue stirring for 20 minutes after completion. Then add the inorganic hydrogel prepared in step (1) and stir for 0.5 hour. After the stirring time is up, add 3.5 moles of nonionic monomer C and 1.5 moles of 3-methacrylamide-2-hydroxypropyltrimethylammonium chloride, and continue stirring for 20 minutes after the addition is complete to obtain a reaction mixture;

[0064] (3) Add the reaction mixture obtained in step (2) into the polymerization tank, stir for 5 minutes, and adjust the pH value of the system to 12 with a 10% sodium hydroxide solution by mass fraction. Nitrogen was passed for 5 minutes, 4.85 grams of ammonium persulfate and ...

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Abstract

The invention relates to a treating agent for a zwitter-ion inorganic-organic monomer polymer drilling fluid and a preparation method of the treating agent, and belongs to the technical field of synthesis and preparation of a water-soluble polymer material. The preparation method comprises the following steps: adopting carboxylic acid monomers A, sulfonic acid monomers B, nonionic monomers C, cationic monomers D and inorganic material monomers E as raw materials; feeding the raw materials, wherein the ratio of the amounts of substances of the carboxylic acid monomers A to the sulfonic acid monomers B to the nonionic monomers C to the cationic monomers D is (5-40):(25-10):(65-35):(5-15), and the dosage of inorganic material monomers E is 5%-25% of the total mass of the carboxylic acid monomers A, the sulfonic acid monomers B, the nonionic monomers C, the cationic monomers D and the inorganic material monomers E; adopting water as a solvent, and initiating polymerization through an oxidation-reduction initiation system to obtain the treating agent. The treating agent has higher anti-collapse ability, can effectively control hydration and dispersion of clay shale and mud making of clay, has a better hydrocarbon reservoir protection effect, and is high in permeability recovering value, simple in production technology, extensive in raw material sources and wide in popularization prospects.

Description

[0001] Technical field: [0002] The invention relates to a zwitterionic inorganic-organic monomer polymer drilling fluid treatment agent and a preparation method thereof, belonging to the technical field of synthesis and preparation of water-soluble polymer materials. [0003] technical background: [0004] The development of drilling fluid technology essentially depends on the development of drilling fluid treatment agents. The research and development of drilling fluid treatment agents mainly follow the fixed mode of organic polymers, and the problem of temperature resistance and salt resistance has become a difficult point in the development of treatment agents. Starting from the molecular design principle of the treatment agent, the inventors have developed a series of new drilling fluid and completion fluid treatment agent products in consideration of the transition from organic to inorganic. [0005] The present inventor discloses the preparation method of inorganic-org...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C08F292/00C08F220/06C08F220/58C08F220/56C08F220/36C08F220/04C08F220/54
Inventor 王中华
Owner CHINA PETROCHEMICAL CORP
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