Preparation method of filtrate reducer and filtrate reducer

A technology of fluid loss control agent and initiator, which is applied in the field of drilling, can solve the problems of poor environmental protection of fluid loss control agent, and achieve good fluid loss control effect, low addition amount, and good fluid loss control effect

Pending Publication Date: 2022-05-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The environmental protection of sulfomethyl phenolic resin or sulfonated phenolic resin type fluid loss reducer is poor

Method used

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  • Preparation method of filtrate reducer and filtrate reducer
  • Preparation method of filtrate reducer and filtrate reducer
  • Preparation method of filtrate reducer and filtrate reducer

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preparation example Construction

[0029] On the one hand, the embodiment of the present invention provides a preparation method of a fluid loss control agent, the preparation method of the fluid loss control agent comprises: providing a preparation raw material, and using the preparation raw material to carry out a polymerization reaction to obtain a fluid loss control agent.

[0030] Wherein, the preparation raw material includes the following components by weight: 5-20 parts of the first anionic monomer, 15-22 parts of the second anionic monomer, 18-30 parts of the hydrophobic monomer, 4-15 parts of the cationic monomer, 0.6-0.8 parts of initiator, 40-60 parts of water, 12-20 parts of pH regulator;

[0031] Wherein, the first anionic monomer is maleic anhydride and / or acrylic acid;

[0032] The second anionic monomer is 2-acrylamide-2-methylpropanesulfonic acid and / or sodium allylsulfonate.

[0033] Exemplarily, the parts by weight of the first anionic monomer include but are not limited to: 10 parts, 15 pa...

Embodiment 1

[0067] This embodiment 1 provides a fluid loss control agent, which is prepared by the following preparation method:

[0068] Step 101: Provide preparation raw materials, which include the following components by weight: 10 parts of the first anionic monomer, 21 parts of the second anionic monomer, 19 parts of the hydrophobic monomer, 8 parts of the cationic monomer, and 0.6 parts of the initiator 45 parts, 45 parts of water, 20 parts of pH regulator.

[0069] Wherein, the first anionic monomer is maleic anhydride; the second anionic monomer is 2-acrylamide-2-methylpropanesulfonic acid; the hydrophobic monomer is selected from acrylamide, N,N-dimethylacrylic acid Amide; cationic monomer is selected from methacryloyloxyethyltrimethylammonium chloride; initiator is ammonium persulfate and sodium bisulfite with a mass ratio of 1:1; pH regulator is selected from Ca(OH) 2 .

[0070] Step 102: Mix the first anionic monomer, the second anionic monomer, the hydrophobic monomer, the ...

Embodiment 2

[0076] This embodiment 2 provides a fluid loss control agent, which is prepared by the following preparation method:

[0077] Step 201: Provide preparation raw materials, which include the following components by weight: 18 parts of the first anionic monomer, 22 parts of the second anionic monomer, 25 parts of the hydrophobic monomer, 12 parts of the cationic monomer, and 0.8 parts of the initiator 50 parts, 50 parts of water, 18 parts of pH regulator.

[0078] Wherein, the first anionic monomer is acrylic acid; the second anionic monomer is sodium allyl sulfonate; the hydrophobic monomer is selected from acrylamide; the cationic monomer is selected from methacryloxyethyltrimethylammonium chloride ; Initiator mass ratio is 1:1 potassium persulfate and sodium bisulfite; PH regulator is selected from KOH.

[0079] Step 202: Mix the first anionic monomer, the second anionic monomer, the hydrophobic monomer, the cationic monomer, and water in a reaction vessel evenly.

[0080] S...

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Abstract

The invention discloses a preparation method of a filtrate reducer and the filtrate reducer, and belongs to the technical field of well drilling. The preparation method comprises the following steps: carrying out polymerization reaction on preparation raw materials to obtain the filtrate reducer, wherein the preparation raw materials comprise the following components in parts by weight: 5-20 parts of a first anionic monomer, 15-22 parts of a second anionic monomer, 18-30 parts of a hydrophobic monomer, 4-15 parts of a cationic monomer, 0.6-0.8 part of an initiator, 40-60 parts of water and 12-20 parts of a pH regulator. The first anionic monomer is maleic anhydride and / or acrylic acid; and the second anionic monomer is 2-acrylamide-2-methylpropanesulfonic acid and / or sodium allysulfonate. The prepared filtrate reducer not only can resist temperature and salt, but also is safer and more environment-friendly, and is especially suitable for deep well or ultra-deep well operation.

Description

technical field [0001] The invention relates to drilling technology, in particular to a preparation method of a fluid loss reducer and the fluid loss reducer. Background technique [0002] During the drilling process, fluid loss additives are usually used in the drilling fluid to play the following roles: it is beneficial to improve the efficiency of fracturing fluid, reduce the amount of fracturing fluid, and reduce the cost of fracturing fluid; it is beneficial to create long and wide fractures, Increase the sand ratio to make fractures have higher flow conductivity; reduce the fracturing fluid's mixing and retention in the oil and gas layers, and reduce the damage to the oil and gas layers. Reduce the damage of fracturing fluid to water-sensitive oil and gas formations. Therefore, it is very necessary to provide a fluid loss reducer. [0003] In the related art, fluid loss additives include starch fluid loss additives, cellulose fluid loss additives, resin fluid loss ad...

Claims

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Application Information

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IPC IPC(8): C08F220/58C08F222/06C08F220/56C08F220/54C08F220/34C08F220/06C08F228/02C09K8/035
CPCC08F220/585C08F220/56C08F220/54C09K8/035C08F222/06C08F220/34C08F220/06C08F228/02C08F222/02
Inventor 黎然刘阳秦山陈骥周代生张佳寅明爽杨少云
Owner PETROCHINA CO LTD
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