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Water-in-oil association type acidification and concentration thickening agent and preparation method thereof

A thickening agent and associative type technology, which is applied in the field of water-in-oil associative acidified concentrated thickening agent and its preparation, and can solve the problems of powdered fish eyes, affecting solution performance, jelly agglomeration and the like

Inactive Publication Date: 2017-07-18
SICHUAN GUANGYA POLYMER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The key to thickened acid is the thickener. The thickened acid thickeners currently used in industry are mainly natural high molecular polymers and polyacrylamide synthetic polymers, which have the following deficiencies: temperature resistance, salt resistance, and shear resistance Poor, poor viscosity, poor solubility, it takes more time to prepare on site, which increases the construction cost
However, the current continuous dispensing technology still has some deficiencies, such as the labor-intensive preparation of the acidified thickener on site, the dry powder (thickener) feeding and dust, uneven mixing, easy to form powdery fish eyes, Partial jelly agglomeration occurs, insufficient dissolution affects the performance of the solution, and the liquids, equipment and instruments involved greatly increase the construction cost and construction difficulty

Method used

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  • Water-in-oil association type acidification and concentration thickening agent and preparation method thereof
  • Water-in-oil association type acidification and concentration thickening agent and preparation method thereof
  • Water-in-oil association type acidification and concentration thickening agent and preparation method thereof

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preparation example Construction

[0060] The present invention also provides a method for preparing the above-mentioned water-in-oil association type acidified thickening agent, comprising the following steps:

[0061] A) mixing and stirring the dispersed phase, the dispersion medium and the composite emulsifier to obtain a water-in-oil emulsion;

[0062] B) adding a hydrophobic association polymer acid thickener to the water-in-oil emulsion, mixing and stirring to obtain a water-in-oil association type acidified thickener.

[0063] In the present invention, firstly, the dispersed phase, the dispersion medium and the composite emulsifier are mixed and stirred to obtain a water-in-oil emulsion, and the temperature of mixing and stirring is 35-70° C., preferably 40-60° C., more preferably 45-55° C.; the mixing The stirring speed is 300-800rmp, preferably 300-600rmp; the mixing and stirring time is 20-40min.

[0064] After the water-in-oil emulsion is obtained, a hydrophobic association polymer acid thickener is...

Embodiment 1

[0069] Preparation of water-in-oil (W / O) associative acidified concentrated thickener (compound emulsifier: propylene glycol monostearate BPMS+Pingpinga O O-5)

[0070] (1) A kind of W / O associative type acidification concentrated thickener, comprises the component of following mass percentage:

[0071] 0# diesel oil 38.22%, water 38.22%, hydrophobic association polymer acid thickener 20%, propylene glycol monostearate BPMS 2.85%, Pingpingjia 0 O-5 0.71%;

[0072] The hydrophobic association polymer acid thickener is acrylamide / acryloxytetradecyl quaternary ammonium salt / 2-acrylamide-2-methylpropanesulfonate copolymer, and the compound The emulsifier is BPMS and O-5 (ratio 4:1), and the preparation steps are as follows:

[0073] At 40°C, control the mass ratio of oil to water to 5:5, mix and emulsify 382.2g diesel, 382.2g water, 28.5g BPMS, 7.1g O-5, and stir at 600rmp for 30min to form a stable water-in-oil emulsion , and finally add 200g of hydrophobic association polymer ...

Embodiment 2

[0083] Preparation of water-in-oil (W / O) associative acidified thickener (compound emulsifier is propylene glycol monolaurate BPML+polyoxyethylene castor oil EL-20)

[0084] (1) A kind of W / O associative type acidification concentrated thickener, comprises the component of following mass percentage:

[0085] 0# diesel oil 42.86%, water 28.57%, hydrophobic association polymer acid thickener 25%, propylene glycol monolaurate BPML 2.14%, polyoxyethylene castor oil EL-20 1.43%;

[0086] Described hydrophobic association polymer acid thickener is acrylamide / acryloxy nonyl quaternary ammonium salt / N-vinyl-2-pyrrolidone copolymer, and described composite emulsifier is BPML and EL-20 ( Ratio 3:2), the preparation steps are as follows:

[0087] At 50°C, control the mass ratio of oil to water to 6:4, mix 428.6g diesel, 285.7g water, 21.4g BPML, and 14.3g EL-20 to emulsify evenly, stir at 600rmp for 30min to form a stable water-in-oil emulsion , and finally add 250g of hydrophobic asso...

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Abstract

The invention provides a water-in-oil association type acidification and concentration thickening agent which contains the following components in percentage by weight: 20-50% of a dispersion medium, 18-45% of a dispersion phase, 20-40% of a hydrophobic association polymer acid liquor thickening agent and 2.5-6% of a compound emulsifier, totaling 100%, wherein the dispersion medium is an organic solvent incompatible with water; the dispersion phase is water; and the compound emulsifier is a compound emulsifier of an emulsifier with an HLB (Hydrophile-Lipophile Balance) value of 3-7 and an emulsifier with an HLB value of 8-10. The concentration thickening agent prepared by the invention has stabilization time of more than 120 days and dissolution time of less than 4 minutes. The performance of a viscous acid prepared by the concentration thickening agent prepared by the invention is superior to the performance of a viscous acid which is directly prepared from dried powder of a corresponding acid liquor thickening agent.

Description

technical field [0001] The invention belongs to the technical field of petroleum, and in particular relates to a water-in-oil association type acidifying thickening agent and a preparation method thereof. Background technique [0002] With the continuous development of low-permeability oil and gas reservoirs, acidizing production stimulation technology has become an important measure for oil and gas production stimulation. Acidizing is an effective method to stabilize and increase production of oil and gas wells, and to stabilize and increase injection of water injection wells. At present, one (or several) acid liquids or acid mixed liquids are injected into the formation through the oil and gas wellbore, and the acid liquid is used to The H+ chemically reacts with some minerals in the formation, dissolves the rock cement on the wall of pores or fractures in the reservoir to improve the permeability of the formation, removes the pollution near the bottom of the production we...

Claims

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Application Information

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IPC IPC(8): C09K8/74
CPCC09K8/74C09K8/725
Inventor 郭拥军杨雪杉
Owner SICHUAN GUANGYA POLYMER CHEM
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