Micro-emulsion viscosity reducer for thick oil, and preparation method thereof

An oil-soluble viscosity reducer and microemulsion technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor oil adaptability and high cost of use of surfactant-based viscosity reducers, and achieve product stability Good performance, improve the degree of uniform use, and strong adaptability

Inactive Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a commonly used auxiliary process in the development of heavy oil, heavy oil viscosity reducers are widely used in wellbore lifting, thermal compound chemical huff and puff, and chemically enhanced cold recovery processes. Currently, the commonly used heavy oil viscosity reducers mainly include oil-soluble viscosity reduce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1:

[0026] The preparation method is carried out as follows:

[0027] a. Take 16 kilograms of OP-10 emulsifier and place it in the reactor, add 24 kilograms of tap water, and gradually heat up to 60°C under stirring conditions of 25 revolutions / min (the heating rate does not exceed 1°C / min);

[0028] b. Reduce the stirring rate to 10 revolutions / min, add 18 kg of anionic surfactant ABS sodium dodecylbenzene sulfonate to the reaction kettle of step a in 5 times, continue to stir for 25 minutes, and then slowly add 37 kg No. 120 solvent oil is added to ensure the air flow in the workshop, and fireworks are strictly prohibited.

[0029] c. Increase the stirring rate to 35 revolutions / min. Under stirring, add 2 kg of Tween 80 emulsifier and 5 kg of long-chain isomeric alcohol to the reaction kettle in turn, and stop heating;

[0030] d. After the reactor is naturally cooled to room temperature, stir for 10 minutes and then put it into the finished product container.

Example Embodiment

[0031] Example 2:

[0032] The preparation method is carried out as follows:

[0033] a. Take 20 kg of OP-10 emulsifier and place it in the reactor, add 20 kg of tap water, and gradually increase the temperature to 55°C under the condition of stirring at 35 revolutions / min (the heating rate does not exceed 1°C / min);

[0034] b. Reduce the stirring rate to 20 revolutions / min, add 22 kg of anionic surfactant ABS sodium dodecylbenzene sulfonate to the reactor of step a in 3 times, continue to stir for 40 minutes, and then slowly add 33 kg No. 120 solvent oil is added to ensure the air flow in the workshop, and fireworks are strictly prohibited.

[0035] c. Increase the stirring rate to 25 revolutions / min. Under stirring, add 4 kg of Tween 80 emulsifier and 3 kg of long-chain isomeric alcohol to the reaction kettle in turn, and stop heating;

[0036] d. After the reactor is naturally cooled to room temperature, it is stirred for 30 minutes and then filled into the finished product containe...

Example Embodiment

[0037] Example 3:

[0038] The preparation method is carried out as follows:

[0039] a. Take 18 kilograms of OP-10 emulsifier and place it in the reactor, add 22 kilograms of tap water, and gradually heat up to 58°C under stirring conditions of 30 revolutions / min (the heating rate does not exceed 1°C / min);

[0040] b. Reduce the stirring rate to 15 revolutions / min, add 20 kg of anionic surfactant ABS sodium dodecylbenzene sulfonate to the reaction kettle of step a in 4 times, continue to stir for 30 minutes, and then slowly add 35 kg No. 120 solvent oil is added to ensure the air flow in the workshop, and fireworks are strictly prohibited.

[0041] c. Increase the stirring rate to 30 revolutions / min. Under stirring, add 3 kg of Tween 80 emulsifier and 4 kg of long-chain isomeric alcohol to the reaction kettle in turn, and stop heating;

[0042] d. After the reaction kettle is naturally cooled to room temperature, stir for 20 minutes and then put it into the finished product container....

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Abstract

The invention provides a micro-emulsion viscosity reducer for thick oil, and a preparation method thereof. The viscosity reducer comprises, by weight, 33-37 parts of an oil-soluble viscosity reducer, 16-20 parts of a nonionic surfactant, 18-22 parts of a sulfonate anionic surfactant, 2-4 parts of a Tween emulsifier, 3-5 parts of isomeric alcohol and 20-24 parts of water. The micro-emulsion viscosity reducer is prepared through a reaction of above raw materials in a reaction kettle at a certain temperature under a certain rotating speed. The micro-emulsion viscosity reducer is processed by oilfield hot sewage to prepare an aqueous solution, and the aqueous solution injected to the underground, so the micro-emulsion viscosity reducer has the characteristics of high viscosity reduction, strong economy and the like, allows the viscosity of the thick oil to be decreased by above 98%, can substitute high-pressure steam exploitation, realizes a very high economic input-output ratio, fully solves the problems of high thick oil viscosity, difficult exploitation and the like in oilfield exploitation and extraction processes, and has a large-scale popularization value.

Description

Technical field [0001] The invention relates to a thick oil viscosity reducer in petroleum exploitation and its preparation, in particular to a heavy oil microemulsion viscosity reducer and a preparation method thereof. Background technique [0002] The content of gums, asphaltenes and paraffin in heavy oil is high, the viscosity is very high, and the fluidity is poor. Therefore, mining and gathering are very difficult. Some physical or chemical methods must be adopted to upgrade or modify the heavy oil to reduce the viscosity. , Improve fluidity, thereby improving mining rate and recovery rate. As a commonly used auxiliary process in the development of heavy oil, heavy oil viscosity reducers are widely used in wellbore lifting, thermal compound chemical huff and puff, and chemically enhanced cold production processes. At present, the commonly used heavy oil viscosity reducers mainly include oil-soluble viscosity reducers , Emulsified viscosity reducer, depolymerization viscosit...

Claims

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Application Information

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IPC IPC(8): C09K8/58
CPCC09K8/584
Inventor 盖平原于田田曹嫣镔贺文媛谢志勤马爱青王志敏曹秋芳林吉生孟秋玉白艳丽
Owner CHINA PETROLEUM & CHEM CORP
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