Anti-emulsion demulsifier for acid fracturing and preparation method thereof

A technology of acidified fracturing and demulsifier, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as difficult to meet the rapid flowback of working fluid, achieve good application and promotion value, reduce costs, and reduce production costs Effect

Inactive Publication Date: 2020-05-12
克拉玛依中科恒信科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the demulsification time of many demulsifiers is more than 2 hours, even 24 hours, which is difficult to meet the requirements of rapid flowback of working fluid after fracturing and acidification

Method used

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  • Anti-emulsion demulsifier for acid fracturing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take co-solvent methanol, add sodium perfluorononenyloxybenzene sulfonate, polyoxyethylene, polyethylene glycol stearyl ether, alkylphenol polyoxyethylene ether and raise the temperature to 30°C, stir for 1.5h, add purified water, Keep the temperature at 30°C, continue to stir for 1.5h, add a stabilizer, keep the temperature at 30°C, continue to stir for 01.5h to obtain an anti-emulsion demulsifier.

[0026] Wherein the added purified water weight is 7 times of the weight of sodium perfluorononenyloxybenzene sulfonate;

[0027] The weight ratio of the raw materials perfluorononenyloxybenzene sulfonate sodium, polyoxyethylene, polyethylene glycol stearyl ether, and alkylphenol polyoxyethylene ether is 4:7:14:2.

[0028] Wherein the stabilizer is octylphenol polyoxyethylene ether OP-15.

[0029] Wherein the weight ratio of co-solvent alcohols to sodium perfluorononenyloxybenzene sulfonate is 5:1.

[0030] Wherein the weight of the stabilizer octylphenol polyoxyethylene ...

Embodiment 2

[0032] Take ethylene glycol as a cosolvent, add sodium perfluorononenyloxybenzenesulfonate, polyoxyethylene, polyethylene glycol stearyl ether, and alkylphenol polyoxyethylene ether and raise the temperature to 70°C, stir for 0.5h, add purification water, keep the temperature at 70°C, continue to stir for 0.5h, add a stabilizer, keep the temperature at 70°C, continue to stir for 0.5h to obtain an anti-emulsion demulsifier.

[0033] Wherein the added purified water weight is 8 times of the weight of sodium perfluorononenyloxybenzene sulfonate;

[0034] The weight ratio of the raw materials perfluorononenyloxybenzene sulfonate sodium, polyoxyethylene, polyethylene glycol stearyl ether, and alkylphenol polyoxyethylene ether is: 6:9:16:6.

[0035] Wherein the stabilizer is octylphenol polyoxyethylene ether OP-15.

[0036] Wherein the weight ratio of co-solvent alcohols to sodium perfluorononenyloxybenzene sulfonate is 7:1.

[0037] Wherein the weight of the stabilizer octylpheno...

Embodiment 3

[0039] Take co-solvent ethanol, add sodium perfluorononenyloxybenzene sulfonate, polyoxyethylene, polyethylene glycol stearyl ether, and alkylphenol polyoxyethylene ether, heat up to 50°C, stir for 1 hour, add purified water, keep The temperature is 50°C, continue to stir for 1 hour, add a stabilizer, keep the temperature at 50°C, and continue to stir for 1 hour to obtain an anti-emulsion demulsifier.

[0040] Wherein the added purified water weight is 7.5 times of the weight of sodium perfluorononenyloxybenzene sulfonate;

[0041] The weight ratio of the raw materials perfluorononenyloxybenzene sulfonate sodium, polyoxyethylene, polyethylene glycol stearyl ether, and alkylphenol polyoxyethylene ether is: 5:8:15:4.

[0042] Wherein the auxiliary solvent is alcohols: methanol, ethanol or ethylene glycol.

[0043] Wherein the stabilizer is octylphenol polyoxyethylene ether OP-15.

[0044] Wherein the weight ratio of co-solvent alcohols to sodium perfluorononenyloxybenzene sulf...

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Abstract

The invention is applied to the field of oil and gas resource exploitation, and particularly relates to an anti-emulsion demulsifier for acid fracturing and a preparation method thereof. The demulsifier is prepared from the following raw materials: sodium perfluorononenyloxy benzenesulfonate, polyoxyethylene, polyethylene glycol octadecanol ether, alkylphenol ethoxylates, a cosolvent and a stabilizer. In order to overcome the defect of long demulsification time of the existing demulsifier, the invention provides a novel demulsifier for acid fracturing, which can demulsify and stratify crude oil emulsion in a short time, meets the requirements of acid fracturing construction, and has good application and popularization values in oil field production, especially in acid fracturing construction.

Description

technical field [0001] The invention is applied in the field of oil and gas resource exploitation, and in particular relates to an anti-emulsion demulsifier for acid fracturing and a preparation method thereof. Background technique [0002] At present, acid fracturing measures are an indispensable technical means in oilfield development. The working fluid used for acid fracturing is foreign to the crude oil in the formation. These liquids contain a large amount of surfactants. After these surfactants are mixed with the liquid, under the flowing conditions, the fracturing fluid or acid liquid and the crude oil in the formation Easily forms emulsions. When the emulsion flows in the pipeline, the frictional resistance is high. If the emulsion formed during the fracturing and acidizing process cannot be demulsified well, it will bring great difficulties to the flowback after fracturing and acidizing, resulting in fracturing. If the liquid or acid stays in the formation for a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74
CPCC09K8/74
Inventor 祁红星石豫新
Owner 克拉玛依中科恒信科技有限责任公司
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