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Fracturing fluid drag reducer, and preparation method and application thereof

A technology of drag reducing agent and fracturing fluid, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of inability to realize on-site liquid preparation, long dissolution time, etc., and achieve shortened dissolution time and good viscosity increasing effect. , the effect of small dissolution time

Active Publication Date: 2014-07-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used slick water is mainly polyacrylamide system type, but to achieve the fluid volume and displacement of volume fracturing, the traditional pre-dosing method cannot meet the requirements, and a continuous mixing vehicle needs to be used for on-site fluid dosing
The problem that arises from this is that the dissolution time of polyacrylamide products currently on the market is too long to meet the requirements of on-site dosing

Method used

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  • Fracturing fluid drag reducer, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Components:

[0046] 60g No. 24 white oil, 8g compound emulsifier, 4g co-emulsifier propanol, 10g acrylic acid, 2g2-methyl-2-allyl ammonium chloride, 2g2-acrylamido-2-methylpropanesulfonic acid, 4g Sodium bicarbonate, 20g of acrylamide, 4mL of 1% ammonium persulfate and sodium bisulfite solution, and water were added to a total of 200g.

[0047] Preparation:

[0048] (1) Add No. 24 white oil, compound emulsifier Span-80 and Tween-60 at a ratio of 22:3, and co-emulsifier propanol in a 500mL three-neck flask, stir until fully mixed, and the stirring speed is 1.2m / s (linear speed of the outer ring of the stirring paddle);

[0049] (2) Add water, acrylic acid, 2-methyl-2-allyl ammonium chloride and 2-acrylamido-2-methylpropanesulfonic acid into the beaker, add sodium bicarbonate while stirring, and stir until fully Dissolve, the stirring speed is 1.2m / s (linear speed of the outer ring of the stirring paddle);

[0050] (3) Add acrylamide to the beaker in step (2), stir ...

Embodiment 2

[0054]40g No. 24 white oil, 6g compound emulsifier, 3g co-emulsifier propanol, 20g acrylic acid, 4g2-methyl-2-allyl ammonium chloride, 3g2-acrylamido-2-methylpropanesulfonic acid, 8g Sodium bicarbonate, 30g of acrylamide, 8mL of 1% ammonium persulfate and sodium bisulfite solution, and water were added to a total of 200g.

[0055] (1) Add No. 24 white oil, compound emulsifier Span-80 and Tween-60 at a ratio of 22:3, and co-emulsifier propanol in a 500mL three-neck flask, stir until fully mixed, and the stirring speed is 1.2m / s (linear speed of the outer ring of the stirring paddle);

[0056] (2) Add water, acrylic acid, 2-methyl-2-allyl ammonium chloride and 2-acrylamido-2-methylpropanesulfonic acid into the beaker, add sodium bicarbonate while stirring, and stir until fully Dissolve, the stirring speed is 1.2m / s (the linear speed of the outer ring of the stirring paddle);

[0057] (3) Add acrylamide to the beaker in step (2), stir until fully dissolved, and the stirring sp...

Embodiment 3

[0061] 30g No. 24 white oil, 4g compound emulsifier, 2g co-emulsifier propanol, 30g acrylic acid, 6g 2-methyl-2-allyl ammonium chloride, 4g 2-acrylamido-2-methylpropanesulfonic acid, 12g Sodium bicarbonate, 40g of acrylamide, 14mL of 1% ammonium persulfate and sodium bisulfite solution, and water were added to a total of 200g.

[0062] (1) In a 500mL three-necked flask, add No. 24 white oil, the compound emulsifier is Span-80 and Tween-60 at a ratio of 22:3, and the co-emulsifier propanol, stir until fully mixed, and the stirring speed is 1.2m / s (linear speed of the outer ring of the stirring paddle);

[0063] (2) Add water, acrylic acid, 2-methyl-2-allyl ammonium chloride and 2-acrylamido-2-methylpropanesulfonic acid into the beaker, add sodium bicarbonate while stirring, and stir until fully Dissolve, the stirring speed is 1.2m / s (the linear speed of the outer ring of the stirring paddle);

[0064] (3) Add acrylamide to the beaker in step (2), stir until fully dissolved, ...

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Abstract

The invention provides a fracturing fluid drag reducer, and a preparation method and an application thereof. The fracturing fluid drag reducer is prepared by using 5-15wt% of an acrylic monomer, 1-3wt% of 2-methyl-2-allyl ammonium chloride, 1-2wt% of 2-acrylamido-2-methylpropanesulfonic acid, 2-6wt% of an alkali, 10-20wt% of an acrylamide monomer, 0.02-0.07wt%of an initiator, 2-4wt% of an emulsifier, 1-2wt% of a co-emulsifier, 15-30wt% of oil, and the balance water. The drag reducer has the advantages of fast dissolving speed, realization of the fast dissolving time of less than 30s, good tackifying effect, and excellent drag reduction performance, and can realize a maximum drag reduction rate of 87% in field application.

Description

technical field [0001] The invention relates to oil and gas well fracturing transformation, and belongs to the field of chemical products for oil and gas field development. Specifically, it relates to a fracturing fluid drag reducer and its preparation method and application. Background technique [0002] Fracturing technology is one of the main measures to increase production in the middle and later stages of oilfield development. With the development of low-permeability and ultra-low-permeability oil and gas reservoirs, due to multiple constraints such as reservoir conditions, injection-production well patterns, and fracturing techniques, single-increase fractures In the long run, the effect of increasing the production of ultra-low permeability reservoirs is not obvious, and conventional fracturing technology modification is difficult to achieve the recovery of such reservoirs. At this time, a new technology "volume fracturing" was proposed. This technology was first app...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F226/02C08F220/58C09K8/68
Inventor 张洪君吴志俊张子明李超刘畅李军李玉印包放李霞关伟徐乐韩冬深韩福柱李鹏日蒋伟杨婉羚王磊
Owner PETROCHINA CO LTD
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