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Filtrate reducer preparation method

A fluid loss reducer and technology for preparation steps, which are applied in the field of preparation of fluid loss reducers, can solve the problems of poor temperature resistance and salt resistance of fluid loss reducers, and reduce the effect of fluid loss reduction, and achieve high fluid loss reduction. performance, improving temperature resistance and salt resistance, and the effect of improving temperature resistance

Inactive Publication Date: 2017-12-01
石磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problem that the traditional fluid loss control agent has poor temperature resistance and salt resistance, which reduces its fluid loss control effect, a preparation method of fluid loss control agent is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] According to the weight ratio of 5:1, respectively weigh tannic acid and 5% sodium hydroxide solution by mass fraction, mix and heat to 85°C, keep stirring for 100min to obtain the mixture, put the mixture at 60°C and rotary evaporate to dryness, collect Dried thing; in parts by weight, choose 80 parts of acrylic acid, 60 parts of sodium p-styrene sulfonate, 12 parts of allyl alcohol polyoxyethylene ether and 200 parts of deionized water respectively, add in a four-necked flask, and use a mass fraction of 5 % sodium hydroxide solution to adjust the pH to 7.0. After adjustment, put the four-necked flask into a water bath and heat up to 55°C, heat and stir for 70 minutes; The rate is 20g / min, and sequentially add 30% dry matter of the reactant mass and 1% potassium persulfate solution of 5% mass fraction of the reactant mass to the four-necked flask, stir and react for 2h after the addition, and stop feeding nitrogen after the reaction is completed. , discharging, collect...

example 2

[0028]According to the weight ratio of 5:1, respectively weigh tannic acid and 3% sodium hydroxide solution by mass fraction, mix and heat to 80°C, keep stirring for 60min to obtain the mixture, place the mixture at 50°C and rotary evaporate to dryness, collect Dried thing; in parts by weight, choose 60 parts of acrylic acid, 40 parts of sodium p-styrene sulfonate, 10 parts of allyl alcohol polyoxyethylene ether and 150 parts of deionized water respectively, add in a four-necked flask, and use a mass fraction of 3 % sodium hydroxide solution to adjust the pH to 7.0. After the adjustment, put the four-necked flask into a water bath and heat up to 50°C, heat and stir for 50 minutes; The rate is 15g / min, and sequentially add 20% dry matter of reactant mass and 1% potassium persulfate solution of 3% mass fraction of reactant mass to the four-necked flask, stir and react for 1h after adding, and stop feeding nitrogen after the reaction is completed. , discharging, collecting the ge...

example 3

[0030] According to the weight ratio of 5:1, respectively weigh tannic acid and 4% sodium hydroxide solution by mass fraction, mix and heat to 82°C, keep stirring for 70min to obtain the mixture, place the mixture at 55°C and rotary evaporate to dryness, collect Dried thing; In parts by weight, choose 70 parts of acrylic acid, 50 parts of sodium p-styrene sulfonate, 11 parts of allyl alcohol polyoxyethylene ether and 170 parts of deionized water respectively, add in a four-necked flask, and use a mass fraction of 4 % sodium hydroxide solution to adjust the pH to 7.0. After adjustment, put the four-necked flask in a water bath and heat it up to 52°C, keep it warm and stir for 60 minutes; The rate is 17g / min, and sequentially add 25% dry matter of reactant mass and 1% potassium persulfate solution of 4% mass fraction of reactant mass to the four-necked flask, stir and react for 1h after adding, and stop feeding nitrogen after the reaction is completed. , discharging, collecting ...

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Abstract

The invention relates to a filtrate reducer preparation method and belongs to the field of petrochemical engineering. The filtrate reducer preparation method disclosed by the invention comprises the steps: firstly mixing, reacting and evaporating tannin and a sodium hydroxide solution to obtain dry matter; then mixing and heating substances of acrylic acid, sodium p-styrene sulfonate and the like, adding substances of the prepared dry matter and the like to react to obtain jelly and drying and smashing to obtain reactant; then mixing substances of aluminum potassium sulfate dodecahydrate, palmitic acid and the like to obtain a mixed solution and mixing and heating the mixed solution and the obtained reactant; dropwise adding an initiator to react, adding an obtained product into absolute ethyl alcohol to be separated out, filtering and drying and smashing filter residues to obtain a filtrate reducer. The temperature-resistance and salt-tolerance filtrate reducer prepared by the preparation method disclosed by the invention still has higher filtrate reduction performance under high-salinity environment and further has better temperature resistance.

Description

technical field [0001] The invention relates to a preparation method of a fluid loss reducer, which belongs to the field of petrochemical industry. Background technique [0002] Due to the high downhole temperature and pressure in deep wells and ultra-deep wells, and the complex formation structure, high pressure oil and gas layers and brine layers are often encountered during drilling. Under such circumstances, it is difficult for people to solve technical problems such as unstable performance of drilling and completion fluid and high filtration rate. During drilling operations, downhole complex accidents such as downhole collapse and pipe sticking often occur, which brings great difficulties to the drilling work. Great inconvenience. Research on high temperature resistant drilling fluids, especially the development of oilfield chemical fluid loss control agents has become an important issue that needs to be solved urgently. [0003] Fluid loss reducer for drilling fluid ...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08F285/00C08F220/58C08F283/06C08F220/06C08F212/14
CPCC08F283/065C08F285/00C09K8/035C09K2208/12C08F220/06C08F212/14C08F220/585
Inventor 石磊薛洋葛明月
Owner 石磊
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