Temperature-resistant type barium strontium sulfate anti-scaling agent for oil field and preparation method thereof

A technology of anti-scaling agent and barium sulfate, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., to achieve good anti-scaling effect

Active Publication Date: 2019-05-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the antiscaling temperature is 70°C, the antiscaling time is 16 hours, and the amount of antiscaling agent is 30mg / L-40mg / L, the antiscaling rate of the antiscaling agent to barium strontium scale is only 50%.

Method used

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  • Temperature-resistant type barium strontium sulfate anti-scaling agent for oil field and preparation method thereof
  • Temperature-resistant type barium strontium sulfate anti-scaling agent for oil field and preparation method thereof
  • Temperature-resistant type barium strontium sulfate anti-scaling agent for oil field and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The mass ratio of maleic anhydride, acrylic acid, methacrylic acid, 2-acrylamido-2-methylpropanesulfonic acid and ammonium persulfate is 30:50:5:14:1.

[0028] The preparation method comprises the following steps:

[0029] (1) Add maleic anhydride, ammonium persulfate and deionized water into a sealed constant temperature stirring device, heat and stir until they are completely dissolved.

[0030] (2) Raise the temperature to 90° C., add dropwise the mixture of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, and functional monomer methacrylic acid at a rate of 20 mL / L.

[0031] (3) After the dropwise addition, the mixture was continuously stirred for 5 h at a temperature of 90° C., cooled and concentrated, and then the supernatant liquid was removed to obtain the obtained product.

[0032] The anti-scaling rate was tested according to the anti-scaling rate test method at 50° C., and the anti-scaling rate was 84%.

Embodiment 2

[0034] The mass ratio of maleic anhydride, acrylic acid, methacrylic acid, 2-acrylamido-2-methylpropanesulfonic acid and ammonium persulfate is 30:52.5:5:12.5:1.5.

[0035] The preparation method comprises the following steps:

[0036] (1) Add maleic anhydride, ammonium persulfate and deionized water into a sealed constant temperature stirring device, heat and stir until they are completely dissolved.

[0037] (2) Raise the temperature to 80° C., and add the mixture of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid and functional monomer methacrylic acid dropwise at a rate of 50 mL / L.

[0038] (3) After the dropwise addition, the mixture was continuously stirred for 1 h at a temperature of 80° C., cooled and concentrated, and then the supernatant liquid was removed to obtain the obtained product.

[0039] The anti-scaling rate was tested according to the anti-scaling rate test method at 50° C., and the anti-scaling rate was 85%.

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Abstract

The invention discloses a temperature-resistant type barium strontium sulfate anti-scaling agent for an oil field and a preparation method thereof. In the high-efficiency temperature-resistant type barium strontium sulfate anti-scaling agent, acrylic acid, maleic anhydride and methacrylic acid are selected as synthetic monomers of the anti-scaling agent to provide a carboxyl group for a polymerization reaction, 2-acrylamido-2-methylpropane sulfonic acid is selected as a sulfonic acid group carrier; ammonium persulfate is selected as an initiator used for the reaction according to the reactionenvironment conditions; the mass ratio of maleic anhydride to acrylic acid to methacrylic acid to 2-acrylamido-2-methylpropane sulfonic acid is 25-60:25-60:3-10:5-15, preferably 25-35:50-60:5-8:10-15.The anti-scaling agent has a better anti-scaling effect at a lower use concentration and can maintain a high anti-scaling rate at a higher ambient temperature.

Description

technical field [0001] The invention belongs to the technical field of oilfield water treatment, in particular to a high-efficiency temperature-resistant barium strontium sulfate antiscaling agent and a preparation method thereof. technical background [0002] When the oil field enters the water-bearing development stage, due to the incompatibility and thermodynamic instability of water, various parts of the formation and wellbore, as well as various parts of the water treatment system of the equipment will be scaled. Scaling is a serious problem encountered in oilfield water quality control, resulting in reduced well production, shortened production equipment life, and reduced formation permeability. At this stage, scaling has become an important factor restricting oilfields from reducing costs and increasing production. [0003] At present, the common scale types in the oilfield production process mainly include carbonate scale and sulfate scale. Among them, the solubilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C08F220/06C08F222/06C08F220/58C02F103/10
Inventor 齐宁樊家铖曲占庆张翔宇李艺恬徐志鹏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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