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Synthesis method of drilling fluid filtrate reducer

A fluid loss reducing agent and a synthesis method technology, which are applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of low molecular weight of polymers, waste of time and energy, difficulty in residual solvents, etc., and achieve high molecular weight, The effect of reducing oil production cost and fast polymerization rate

Inactive Publication Date: 2013-04-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] But, above method has following shortcoming: (1) monomer concentration is low, and on the one hand makes polymerization rate slower, and yield is lower; (2) The obtained polymer product needs to be sheared and granulated, and then dried and pulverized to a powder to obtain the product, which wastes time and energy; (3) In the process of using the oil field, the product needs Dissolve further with solvent
It not only wastes solvent, increases the cost of production, but also pollutes the environment in the process of use and recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 0.90 g of emulsifier Span-60, 0.15 g of OP-10 (the HLB value of the composite emulsifier is 6.0) and 20 mL of liquid paraffin into a three-necked flask, stir and dissolve at room temperature, and form an oil phase. Dissolve 12.5mL of monomer acrylic acid, 11.40g of acrylamide and 23.10g of sodium propylene sulfonate in 30mL of water, adjust the pH value of the solution to 8.0 with 1mol / L NaOH solution, add 0.09g of potassium persulfate into the monomer aqueous solution, and finally set Make up to 80mL as an aqueous phase solution. Add the aqueous phase solution into the three-necked flask at room temperature, raise the temperature to 50°C within half an hour after stirring, and continue stirring for 1 hour to obtain the emulsion product.

Embodiment 2

[0036]Add 1.40 g of emulsifier Span-80, 0.30 g of Tween-85 (the HLB value of the composite emulsifier is 5.5) and 20 mL of liquid paraffin into a three-necked flask, stir and dissolve at room temperature, and form an oil phase. Dissolve 6.0mL of monomer acrylic acid, 13.00g of acrylamide and 26.50g of sodium propylene sulfonate in 30mL of water, adjust the pH of the solution to 8.0 with 1mol / L NaOH solution, add 0.12g of potassium persulfate to the monomer solution, and finally Dilute to 80mL of aqueous phase solution. Add the aqueous phase solution into the three-necked flask at room temperature, raise the temperature to 50°C within half an hour after stirring, and continue stirring for 1 hour to obtain the emulsion product.

Embodiment 3

[0038] Add 1.90 g of emulsifier Span-80, 0.10 g of Tween60 (the HLB value of the composite emulsifier is 4.8) and 20 mL of liquid paraffin into a three-necked flask, stir and dissolve at room temperature, and form an oil phase. Dissolve 3.5mL of monomer fumaric acid, 14.2g of acrylamide and 22.8g of sodium propylene sulfonate in 30mL of water, adjust the pH of the solution to 8.5 with 1mol / L KOH solution, add 0.10g of sodium persulfate into the monomer aqueous solution, Finally, dilute to 80mL of aqueous phase solution. Add the aqueous phase solution into a three-necked flask at room temperature, raise the temperature to 55°C within half an hour after stirring, and continue stirring for 4 hours to obtain the emulsion product.

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PUM

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Abstract

The invention relates to a synthesis method of drilling fluid filtrate reducer. The method comprises: a, nonionic compound emulsifying agent is dissolved in oil and oil phase is made up; a first monomer chosen from fumaric acid, maleic acid, itaconic acid or crylic acid, a second monomer chosen from N, N- dimethylacrylamide, N, N-diethylacrylamide or acrylamide and a third monomer chosen from 4-vinylbenzenesulfonic acid sodium salt, sodium allylsulfonate, 3-allyloxy-2-dydroxy-1-sodium allylsulfonate, 2- methacryloxypropyl-2-methyl propanesulfonic acid, 2-acrylamido-2-methyl propanesulfonic acid or SMAS are dissolved in water with the molar ratio of 1:1 to 5:1 to 5, the pH value of the solution is adjusted to be between 8 and 11, evocating agent is added and water phase solution is made up; and b, the water solution is added to the oil phase solution and the temperature rises to 40 to 70 DEG C for polymerization. The method of the invention has the advantages of fast polymerization speed, high outcome molecular weight and high outcome stability, good filtrate reducing performance, high temperature resistance and high salt resistant performance.

Description

technical field [0001] The invention relates to a method for synthesizing a fluid loss reducer for drilling fluid, and belongs to the technical field of preparation methods for the synthesis of water-soluble polymer materials for petroleum drilling fluid chemicals. Background technique [0002] Drilling fluid loss reducer is the most widely used drilling fluid treatment agent in petroleum drilling, and it occupies an extremely important position in oilfield cementing engineering. During the drilling process, the invasion of the filtrate of the drilling fluid into the formation will cause the shale to hydrate and expand. In severe cases, it will lead to instability of the wellbore wall and various downhole complex situations. The purpose of adding fluid loss reducer is to reduce the fluid loss of drilling fluid as much as possible by forming a low-permeability, flexible, thin and dense filter cake on the well wall, so as to maintain an appropriate water-cement ratio of the ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
Inventor 马贵平
Owner BEIJING UNIV OF CHEM TECH
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