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Cleanup additive for fracturing fluid and preparation method

A technology of fracturing fluid and drainage aid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve problems such as large performance differences and great influence of surface tension and interfacial tension

Active Publication Date: 2020-08-11
XINJIANG DELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many types of drainage aids used at home and abroad, and their performances are quite different. The main indicators for evaluation are to measure their surface tension and interfacial tension. However, in the actual application of drainage aids, they will inevitably be mixed with other additives. Research It shows that other additives have a great influence on the surface tension and interfacial tension of the drainage aid, so further optimization of the drainage aid formula has important practical significance

Method used

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  • Cleanup additive for fracturing fluid and preparation method
  • Cleanup additive for fracturing fluid and preparation method
  • Cleanup additive for fracturing fluid and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 10 parts of 6501 surfactant, 30 parts of alkylphenol polyoxyethylene ether, and 20 parts of polyoxyethylene octylphenol ether into the reaction kettle in sequence, stir at a constant speed of 60r / min, and heat up to 37-43°C , keep warm for 2h, after the reaction is over, stop stirring, and cool to room temperature; then add 60 parts of fluorocarbon surfactant, 30 parts of glycerol, and 20 parts of polyethylene diamine tetraacetic acid into the reactor, and the stirring rate is 120r / Stir for 1 min, heat up to 57-63°C, and keep warm for 2 hours. After the reaction, stop stirring and cool to room temperature to obtain the drainage aid for fracturing fluid.

Embodiment 2

[0032] Add 20 parts of 6501 surfactant, 40 parts of alkylphenol polyoxyethylene ether, and 30 parts of polyoxyethylene octylphenol ether into the reaction kettle in sequence, stir at a constant speed of 60r / min, and heat up to 37-43°C , keep warm for 2h, after the reaction is over, stop stirring, and cool to room temperature; then add 70 parts of fluorocarbon surfactant, 40 parts of glycerin, and 30 parts of polyethylene diamine tetraacetic acid into the reactor, and the stirring rate is 120r / Stir for 1 min, heat up to 57-63°C, and keep warm for 2 hours. After the reaction, stop stirring and cool to room temperature to obtain the drainage aid for fracturing fluid.

Embodiment 3

[0034] Add 30 parts of 6501 surfactant, 60 parts of alkylphenol polyoxyethylene ether, and 40 parts of polyoxyethylene octylphenol ether into the reaction kettle in sequence, stir at a constant speed of 60r / min, and heat up to 37-43°C , keep warm for 2h, after the reaction is over, stop stirring, and cool to room temperature; then add 80 parts of fluorocarbon surfactant, 50 parts of glycerin, and 40 parts of polyethylene diamine tetraacetic acid into the reactor, and the stirring speed is 120r / Stir for 1 min, heat up to 57-63°C, and keep warm for 2 hours. After the reaction, stop stirring and cool to room temperature to obtain the drainage aid for fracturing fluid.

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Abstract

The invention provides a cleanup additive for fracturing fluid. The cleanup additive is mainly prepared from the following raw materials in parts by mass: 10-30 parts of an amide type nonionic surfactant, 30-60 parts of a polyoxyethylene type nonionic surfactant, 20-40 parts of an emulsifier, 60-80 parts of a fluorocarbon surfactant, 30-50 parts of a low molecular alcohol and 20-40 parts of a heavy metal trapping agent. According to the cleanup additive for the fracturing fluid, on one hand, the surface tension and the interfacial tension are small, the performance is stable, and the flowbackeffect of the fracturing fluid can be improved; on the other hand, the compatibility with other additives is good, under the condition that other additives are added, the influence on the surface tension and the interfacial tension is small, the manufacturing method is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of oilfield chemical additives, in particular to a drainage aid for fracturing fluid and a preparation method thereof. Background technique [0002] In the process of acidizing and fracturing oil wells, the flowback fluid in the well needs to be quickly discharged to the surface. Usually, the flowback fluid is quickly discharged to the surface by relying on the pressure of the formation itself. When the formation pressure gradually weakens, the flowback speed of the flowback fluid in the well decreases significantly. After the residue in the flowback fluid is precipitated, it will block the bottom layer, causing secondary pollution of the formation and affecting the construction progress and efficiency. In order to solve the difficult problem of flowback fluid flowback after acid fracturing of oil reservoirs, the use of drainage aids is a conventional means. [0003] Drainage aid is a kind of additive used ...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/60C09K8/86C09K8/88
CPCC09K8/68C09K8/685C09K8/602C09K8/604C09K8/605C09K8/86C09K8/885C09K8/887
Inventor 宋勇艾山·玉素莆余莉陈晓青
Owner XINJIANG DELAND
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