High-temperature microemulsion cleanup additive used for fracturing, and preparation method thereof

A technology of microemulsion and drainage aid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve the effect of improving flowback effect, improving flow capacity and preventing emulsification

Active Publication Date: 2016-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] High-temperature microemulsion drainage aids for fracturing are different from traditional drainage aids in that the latter pays more attention to the surface tension and interfacial tension of the system, while the former considers the synergistic effect of surface tension, interfacial tension and wettability at the same time, and can be more effective It improves the flow ability of water-phase fluid in the nano-micron pores, prevents emulsification, wettability reversal and formation scaling, thereby improving the flowback effect of fracturing fluid, while most drainage aids do not consider the synergistic effect

Method used

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  • High-temperature microemulsion cleanup additive used for fracturing, and preparation method thereof
  • High-temperature microemulsion cleanup additive used for fracturing, and preparation method thereof
  • High-temperature microemulsion cleanup additive used for fracturing, and preparation method thereof

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Effect test

Embodiment 1

[0062] The preparation method of the high-temperature microemulsion drainage aid for fracturing is carried out as follows:

[0063] a. First add 10 parts by mass of water into the reactor, then add 60 parts by mass of ethanol into the water, and stir until completely dissolved at room temperature;

[0064] b. Get 40 parts by mass of ethylene didodecyl dimethyl ammonium chloride and 4 parts by mass of coconut oil fatty acid monoethanolamide and add them to the reactor successively, then add water until the mixture in the reactor is 100 parts by mass, at room temperature Stir evenly to obtain the product.

Embodiment 2

[0066] The preparation method of the high-temperature microemulsion drainage aid for fracturing is carried out as follows:

[0067] a. First add 20 parts by mass of water into the reactor, then add 40 parts by mass of ethanol into the water, and stir until completely dissolved at room temperature;

[0068] b. Get 20 parts by mass of ethylene didodecyl dimethyl ammonium chloride and 3 parts by mass of coconut oil fatty acid monoethanolamide and add them to the reactor successively, then add water until the mixture in the reactor is 100 parts by mass, at room temperature Stir evenly to obtain the product.

Embodiment 3

[0070] The preparation method of the high-temperature microemulsion drainage aid for fracturing is carried out as follows:

[0071] a. First add 15 parts by mass of water into the reactor, then add 50 parts by mass of ethanol into the water, and stir until completely dissolved at room temperature;

[0072] b. Get 30 parts by mass of ethylene didodecyl dimethyl ammonium chloride and 3.5 parts by mass of coconut oil fatty acid monoethanolamide and add them to the reactor successively, then add water until the mixture in the reactor is 100 parts by mass, at room temperature Stir evenly to obtain the product.

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Abstract

The invention provides a high-temperature microemulsion cleanup additive used for fracturing, and a preparation method thereof. The preparation method comprises the following steps: 1, adding 10-20 parts by mass of water into a reactor, adding 40-60 parts by mass of a cosurfactant to water, and stirring the cosurfactant and water at room temperature until the cosurfactant is completely dissolved; and 2, sequentially adding 20-40 parts by mass of a gemini surfactant and 3-4 parts by mass of a nonionic surfactant into the reactor, supplementing water to the reactor until the mass part number of a mixture obtained in the reactor is 100, and uniformly stirring the mixture at room temperature to obtain the high-temperature microemulsion cleanup additive. The high-temperature microemulsion cleanup additive is directly added to a fracturing fluid or an acidifying liquid according to a mass ratio of 0.1-0.3:100 when used.

Description

technical field [0001] The invention relates to the field of oil and gas field fracturing technology, in particular to a high-temperature microemulsion drainage aid for fracturing and a preparation method thereof. Background technique [0002] In recent years, the demand for oil and natural gas resources in various countries has skyrocketed. In the face of huge energy demand, the construction and production of oil and gas production capacity in the world are relatively insufficient, so people began to pay more attention to unconventional oil and gas resources. Unconventional oil and gas generally include tight and ultra-tight sandstone oil and gas, mudstone shale oil and gas, super-heavy (thick) oil, bituminous sandstone, coalbed methane, water-soluble gas, natural gas hydrate, etc. With the continuous deepening of exploration and production in my country, it is more and more difficult to increase reserves and production of conventional oil and gas resources, and the strate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/74
CPCC09K8/602C09K8/68C09K8/74
Inventor 宋李煜黄波陈凯陈磊仲岩磊王丹刘霜姜阿娜卢娜娜王丽萍杨彪吕永利刘伟
Owner CHINA PETROLEUM & CHEM CORP
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