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Oil-in-water type crude oil emulsification viscosity reducer and preparation method thereof

An emulsification and viscosity reduction, oil-in-water technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost and complex synthesis process, and achieve the requirements of mineral salt resistance, simple synthesis operation, and resistance to ore. The powerful effect of salt

Inactive Publication Date: 2013-11-27
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, patents US4811788 and CN1115778 respectively report using polyoxyethylene eicosanol ether sulfonate and polyoxyethylene phenolic resin phosphonate surfactants as heavy oil viscosity reducers, which can withstand high temperatures of 300 to 320°C, but the synthesis process complex and costly

Method used

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  • Oil-in-water type crude oil emulsification viscosity reducer and preparation method thereof
  • Oil-in-water type crude oil emulsification viscosity reducer and preparation method thereof
  • Oil-in-water type crude oil emulsification viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of abietic acid polyethylene glycol (1000) half ester. The composite operation is:

[0042] Add successively in the reaction flask with stirrer, water separator and thermometer: 24g through pulverized special-grade rosin, 80g polyethylene glycol (relative molecular weight 1000), use N 2 Purge the reaction bottle; heat and melt rapidly and keep stirring, when the temperature of the reaction bottle rises to about 200°C, add 1.0g of phosphorous acid, continue to heat up to the system temperature of 280°C, react at this temperature, use the water separator to continuously move In addition to the water produced by the reaction, the reaction was completed in about 2 hours. Cool the reaction system to 30-40° C. to obtain a light yellow paste of abietic acid polyethylene glycol (1000) half ester. The n value is 23. .

[0043] (2) Preparation of abietic acid polyethylene glycol (1000) sulfate. The composite operation is:

[0044] 60g of abietic acid polyeth...

Embodiment 2

[0048] (1) Preparation of abietic acid polyethylene glycol (2000) half ester. The composite operation is:

[0049] Add successively in the reaction flask with stirrer, water separator and thermometer: 24g through pulverized special-grade rosin, 160g polyethylene glycol (relative molecular weight 2000), use N 2 Purge the reaction bottle; heat it under constant stirring, when the temperature of the reaction bottle rises to about 200°C, add 1.0g of phosphorous acid, continue to heat up to the system temperature of 285°C, react at this temperature, and use the water separator to continuously remove The water produced by the reaction was completed in about 2 hours. Cool the reaction system to 30-40° C. to obtain a light yellow semi-wax abietic acid polyethylene glycol (2000) half ester. The product n value was 46.

[0050] (2) Preparation of abietic acid polyethylene glycol (2000) sulfate. The composite operation is:

[0051] 60g rosin acid polyethylene glycol (2000) half este...

Embodiment 3

[0056] ① Weigh 0.1g, 0.2g, 0.3g, 0.4g and 0.5g of the viscosity reducer prepared in Example 1, and make 0.1% by mass, 0.2% by mass, 0.3% by mass, 0.4% by mass and 0.5% by mass of the viscosity reducer respectively Viscosity aqueous solution; ②Add 49mL of hot viscous oil and 21mL of viscosity reducer aqueous solution of various concentrations to five sets of 100mL colorimetric tubes respectively, ultrasonically oscillate at 50°C for 30min, and age in an oven at 50°C for 4 hours;③ Draw 15mL of the aged emulsion and inject it into the Brookfield rotary drum viscometer, adjust the temperature of the rotor water bath to 50°C, preheat for 20min, and measure the viscosity of the emulsion μ e , mPa.s; ④ Measure the viscosity μ of heavy oil at the same temperature 0 , mPa.s. ⑤ Calculate the viscosity reduction rate η.

[0057] η(%)=[(μ 0 -μ e ) / μ 0 ]×100

[0058] Following the same procedure as above, the viscosity reducing efficiency of the viscosity reducing agent prepared in E...

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Abstract

The invention relates to an oil-in-water type crude oil emulsification viscosity reducer and a preparation method thereof. The viscosity reducer is a mixture composed of rosin apolyethylene glycol monoester and a sodium salt of rosin polyethylene glycol sulfate according to a molar ratio of (0.5-1.5):1. The preparation method of the viscosity reducer comprises the following steps: esterifying rosin acid and polyethylene glycol to prepare the rosin apolyethylene glycol monoester; reacting excel rosin apolyethylene glycol monoester with chlorosulfonic acid to prepare rosin polyethylene glycol sulfate; and neutralizing the rosin polyethylene glycol sulfate and an alkali to form the salt. The viscosity reducer which is a rosin resin acid derivative has the advantages of strong emulsification capability, low addition amount, high viscosity reduction efficiency, and strong temperature and salt resistance, can be naturally degraded, is in favor of environmental protection, can substantially reduce the viscosity and the flow resistance of ground high-viscosity crude oil, and is also suitable for the viscosity reduction conveying of the ground high-viscosity crude oil. The preparation method of the viscosity reducer has the advantages of reliable principle, simple synthetic operation, no separation and purification of products, and possessing of the synergism and good viscosity reduction performances of all the components.

Description

technical field [0001] The invention relates to an oil-in-water (O / W) type crude oil emulsification viscosity reducer and a preparation method thereof, and belongs to the technical field of petroleum engineering heavy oil exploitation and heavy oil viscosity reduction. Background technique [0002] Heavy oil generally refers to crude oil with a surface density greater than 0.943 and a subsurface viscosity greater than 50 centipoise. It is estimated that the total resources of conventional oil in the world are 300 billion tons, while the equivalent reserves of unconventional oil resources such as heavy oil, oil sands and oil rocks are estimated to be 800-900 billion tons. According to reports, my country's heavy oil reserves rank seventh in the world, and 15 large and medium oil-bearing basins and a large number of heavy oil reservoir blocks have been discovered so far. With the reduction of recoverable reserves of light oil, the proportion of heavy oil recovery will continu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/588C09K8/584C08G65/48
Inventor 汤勇卿凤陈红军方天成
Owner SOUTHWEST PETROLEUM UNIV
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