Preparation method of high-temperature-resisting filtration-loss reducer for drilling fluid

A filtrate reducer and anti-high temperature technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of drilling fluid flocculation and stratification, malignant fluid loss, stuck pipe, etc., and achieve temperature and salt resistance Outstanding calcium intrusion ability, good adsorption performance, and the effect of reducing filtration loss

Inactive Publication Date: 2017-11-21
新沂市中诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the anti-high temperature fluid loss reducer degrades in the drilling fluid, the temperature resistance of the drilling fluid will drop sharply, which will cause the rheology of the drilling fluid to deteriorate, flocculation and stratification of the drilling fluid, and even malignant fluid loss and mud cake thickening. , resulting in various accidents such as drill stuck, buried drill, well collapse, etc.

Method used

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  • Preparation method of high-temperature-resisting filtration-loss reducer for drilling fluid
  • Preparation method of high-temperature-resisting filtration-loss reducer for drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Mix 35 parts of 2-acrylamide-2-methylpropanesulfonic acid AMPS and 25 parts of acrylic acid AA, add appropriate amount of potassium hydroxide to adjust its pH to 7~8, add 32 parts of acrylamide AM and 8 parts of N-ethylene Base pyrrolidone NVP and stir well. Add 0.2 parts of disodium edetate to the mixed monomer solution, and transfer the mixed solution into the reaction kettle after completely dissolving. Add 1 part of chitosan-Mn-bentonite material while stirring, then fill with nitrogen and heat up. press n 过硫酸钠 :n 亚硫酸钠 =1.2:1 Weigh 0.3 parts of the monomer mass to make a solution, slowly add it into the reactor alternately, keep the reaction temperature in the reactor at 30°C and stir at 300r / min for 8 hours, when the liquid viscosity in the reactor reaches 500cp above, and when the solution turns light yellow, the material is discharged and cooled to obtain a high temperature resistant fluid loss reducer.

[0012] The preparation method of the above-mentioned c...

Embodiment 2

[0021] Mix 42 parts of 2-acrylamide-2-methylpropanesulfonic acid AMPS and 30 parts of acrylic acid AA, add appropriate amount of potassium hydroxide to adjust its pH to 7~8, add 25 parts of acrylamide AM and 7 parts of N-vinyl Pyrrolidone NVP was stirred well. Add 0.2 parts of disodium edetate to the mixed monomer solution, and transfer the mixed solution into the reaction kettle after completely dissolving. Add 2 parts of chitosan-Mn-bentonite material while stirring, then fill with nitrogen and heat up. press n 过硫酸钠 :n 亚硫酸钠 =1.2:1 Weigh 0.3 parts of the monomer mass to form a solution, slowly add it into the reactor alternately, keep the reaction temperature in the reactor at 35°C and stir at 300r / min for 8 hours, when the liquid viscosity in the reactor reaches 500cp above, and when the solution turns light yellow, the material is discharged and cooled to obtain a high temperature resistant fluid loss reducer.

Embodiment 3

[0023] Mix 45 parts of 2-acrylamide-2-methylpropanesulfonic acid AMPS and 25 parts of acrylic acid AA, add appropriate amount of potassium hydroxide to adjust its pH to 7~8, add 25 parts of acrylamide AM and 5 parts of N-vinyl Pyrrolidone NVP was stirred well. Add 0.2 parts of disodium edetate to the mixed monomer solution, and transfer the mixed solution into the reaction kettle after completely dissolving. Add 2 parts of chitosan-Mn-bentonite material while stirring, then fill with nitrogen and heat up. press n 过硫酸钠 :n 亚硫酸钠 =1.2:1 Weigh 0.3 parts of the monomer mass to make a solution, slowly add it into the reactor alternately, keep the reaction temperature in the reactor at 40°C and stir at 300r / min for 8 hours, when the liquid viscosity in the reactor reaches 500cp above, and when the solution turns light yellow, the material is discharged and cooled to obtain a high temperature resistant fluid loss reducer.

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Abstract

The invention discloses a preparation method of a high-temperature-resisting filtration-loss reducer for drilling fluid. The high-temperature-resisting filtration-loss reducer is prepared from the following raw materials, including acrylamide, acrylic acid, 2-acrylamido-2-methylpropane sulfonic acid and N-vinylpyrrolidone; the optimum condition for synthesis is that the four monomers are used in parts by weight: 35-45 parts of acrylamide, 25-30 parts of acrylic acid, 25-35 parts of 2-acrylamido-2-methylpropane sulfonic acid and 5-8 parts of N-vinylpyrrolidone, which are subjected to aqueous solution polymerization to obtain the high-temperature-resisting filtration-loss reducer; the reducer also comprises 1-3 parts of an initiator assistant, namely chitosan Mn-bentonite; the reaction temperature is 30-40 DEG C, the reaction time is 8h, the ratio of oxidation / reduction initiator, namely n sodium persulfate to n sodium sulfite being 1.2 to 1, 0.3 part by weight of the initiator, is adopted, and the optimum pH value of a monomer solution is 7-8. The product can resist high temperature of 210 DEG C, and the filtration loss reducing effect is good.

Description

technical field [0001] The invention relates to the field of preparation of drilling fluid fluid loss reducer, and relates to a preparation method of a tetrapolymer. Background technique [0002] In recent years, with the increasing demand for oil and gas around the world and the reduction of conventional oil and gas reserves, oil exploration technology has gradually developed to deeper formations, and the bottom hole temperature has gradually increased. As the core of high temperature resistant drilling fluid, fluid loss reducer for high temperature drilling fluid plays an extremely important role in the drilling process. Once the anti-high temperature fluid loss reducer degrades in the drilling fluid, the temperature resistance of the drilling fluid will drop sharply, which will cause the rheology of the drilling fluid to deteriorate, flocculation and stratification of the drilling fluid, and even malignant fluid loss and mud cake thickening. , causing various accidents s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/06C08F220/56C08F226/08C09K8/035
CPCC08F220/58C08F220/585C09K8/035C08F220/06C08F220/56C08F226/08
Inventor 鲍荣
Owner 新沂市中诺新材料科技有限公司
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