Supercritical carbon dioxide oil-in-oil emulsion thickener and its preparation method and application

A carbon dioxide and oil-in-oil technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost, unfavorable storage, transportation and environmental protection, and high dosage, and achieve the effect of low product cost

Inactive Publication Date: 2018-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, SC-CO 2 The thickeners used mainly include fluorine-containing and silicon-containing high-molecular polymers. The former is the most effective type of thickening, but there are problems of large dosage and high cost; silicon-containing polymers are the most cost-effective type. , but contains a large amount of organic solvents, which is not conducive to storage, transportation and environmental protection

Method used

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  • Supercritical carbon dioxide oil-in-oil emulsion thickener and its preparation method and application
  • Supercritical carbon dioxide oil-in-oil emulsion thickener and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method of supercritical carbon dioxide oil-in-oil emulsion thickener of the present invention, adopts the raw material of following weight portion proportioning and carries out as follows:

[0038] a. Take 5 grams of terminal vinyl silicone oil, 5 grams of hexafluorobutyl acrylate, 3 grams of butyl acrylate, 1.0 grams of divinylbenzene, 0.05 grams of azobisisobutyronitrile, 8 grams of fatty acid ester GMS, and 10 grams of cyclohexane gram, 58.5 grams of ethylene glycol, are placed in container, high-speed shearing 25 minutes, get pre-emulsion;

[0039] b. Add the remaining ethylene glycol 31.5 grams and the pre-emulsion of step a 6% amount in a dry three-necked flask provided with a stirrer, a condenser and a dropping funnel, heat up to 50° C. under stirring, and keep warm for 40 minutes;

[0040] c. Add the remaining amount of pre-emulsion dropwise and react for 25 hours;

[0041] d. Cool to room temperature to obtain the product.

Embodiment 2

[0043] The method of supercritical carbon dioxide oil-in-oil emulsion thickener of the present invention, adopts the raw material of following weight portion proportioning and carries out as follows:

[0044] a. Take 35 grams of terminal vinyl silicone oil, 3 grams of hexafluorobutyl acrylate, 5 grams of butyl acrylate, 0.1 grams of divinylbenzene, 0.2 grams of azobisisobutyronitrile, 1 gram of fatty acid ester GMS, and 55 grams of cyclohexane gram, ethylene glycol 67.5 grams, be placed in container, high-speed shearing 35 minutes, get pre-emulsion;

[0045] b. Add the remaining ethylene glycol 22.5 grams and the pre-emulsion of step a step 4% in the dry there-necked flask provided with agitator, condenser and dropping funnel, heat up to 80°C under stirring, and keep warm for 25 minutes;

[0046] c. Add the remaining amount of pre-emulsion dropwise and react for 5 hours;

[0047] d. Cool to room temperature to obtain the product.

[0048] Example: 3:

[0049] The method of ...

Embodiment 4

[0055] The method of supercritical carbon dioxide oil-in-oil emulsion thickener of the present invention, adopts the raw material of following weight portion proportioning and carries out as follows:

[0056]a. Take 35 grams of terminal vinyl silicone oil, 3 grams of hexafluorobutyl acrylate, 5 grams of butyl acrylate, 0.1 grams of divinylbenzene, 0.2 grams of azobisisobutyronitrile, 1 gram of fatty acid ester GMS, and 55 grams of cyclohexane gram, ethylene glycol 33.75 grams, be placed in container, high-speed shearing 35 minutes, get pre-emulsion;

[0057] b. Add remaining 11.25 grams of ethylene glycol and 4% pre-emulsion in step a to a dry three-necked flask equipped with agitator, condenser and dropping funnel, heat up to 80°C under stirring, and keep warm for 25 minutes;

[0058] c. Add the remaining amount of pre-emulsion solution dropwise and react for 5 hours;

[0059] d. Cool to room temperature to obtain the product.

[0060] Embodiment: 5:

[0061] The method of...

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Abstract

The invention provides a supercritical carbon dioxide oil-in-oil emulsion thickener and a preparation method and application thereof. The preparation method is carried out according to the following steps: a. terminal vinyl silicone oil, hexafluorobutyl acrylate, butyl acrylate, diethylene Base benzene, initiator, emulsifier, cyclohexane, and 65-75% ethylene glycol are placed in a container, and sheared at high speed for 25-35 minutes to obtain a pre-emulsion; b. Add the remaining amount of ethylene glycol and the pre-emulsion of 4 to 6% of the amount of step a in the dry three-necked flask of the dropping funnel, heat up to 50 ° C to 80 ° C under stirring, and keep the temperature for 25 to 40 minutes; c. drip the remaining amount The pre-emulsion is reacted for 5h~25h; d. Cool to room temperature to obtain the product. It has the characteristics of rapid dissolution in SC-CO2, low cost and good thickening effect on SC-CO2.

Description

Technical field: [0001] The invention relates to the technical field of oil recovery, in particular to a supercritical carbon dioxide oil-in-oil emulsion thickener and a preparation method and application thereof. Background technique: [0002] In recent years, gas injection enhanced oil recovery technology has attracted much attention, among which CO injection 2 It is one of the most important gas injection EOR methods. This technology can not only meet the needs of oil field development, but also solve the problem of carbon dioxide sequestration and protect the atmospheric environment. This technology is not only applicable to conventional oil reservoirs, but also to low-permeability and ultra-low-permeability reservoirs, which can significantly improve oil recovery. [0003] Supercritical carbon dioxide (SC-CO 2 ) has the characteristics of low viscosity, good fluidity and strong solvency. But since SC-CO 2 Low viscosity, the displacement front is sensitive to viscou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/12C08F220/22C08F220/18C08F212/36C08F2/30C09K8/594
Inventor 汪庐山刘巍王涛靳彦欣徐鹏薄纯辉王昊江汇张光焰
Owner CHINA PETROLEUM & CHEM CORP
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