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Nano-emulsion composition, nano-emulsion, preparation method of nano-emulsion, anti-coagulation viscosity reducer for fracturing fluid and preparation method of anti-coagulation viscosity reducer

A technology of nanoemulsion and composition, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of high viscosity of crude oil and easy aggregation of wax crystals.

Active Publication Date: 2021-06-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a kind of nanoemulsion composition, nanoemulsion and its preparation method, fracturing fluid anticoagulant viscosity reducer and its preparation method, to solve the crude oil viscosity of tight reservoir in the prior art, Problems with Easy Wax Crystal Convergence

Method used

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preparation example Construction

[0027] The preparation method of the above-mentioned nanoemulsion of the present application is simple, and only needs to mix the nanoemulsion composition according to the above mass ratio, which reduces the preparation cost of the nanoemulsion.

[0028] In order to further improve the high efficiency of the preparation of the above-mentioned nanoemulsion, so that the nanoemulsion forms a more stable winsor-III type microemulsion system, the above-mentioned preparation method preferably includes mixing the components of the nanoemulsion to obtain a mother liquor; ultrasonically treating the mother liquor to obtain a nanoemulsion For the emulsion, the time of ultrasonic treatment is preferably 20-30 minutes, and the frequency of ultrasonic treatment is more preferably 19-21KHZ.

[0029] In yet another typical embodiment of the present application, a nanoemulsion is provided, and the nanoemulsion is a nanoemulsion obtained by any one of the above preparation methods.

[0030] Th...

Embodiment 1

[0040] In percent by weight, get 20% cyclohexane, 10% water, 30% fatty alcohol polyoxyethylene ether sodium sulfate (AES), 15% Tween80, 20% ethyl acetate and 5% propylene glycol butyl The ether is mixed evenly in the reactor to obtain a nanoemulsion.

[0041] In terms of weight percentage, 4.5% of the above-mentioned nanoemulsion components are added dropwise to 95.5% of stirred water to obtain 4.5% of anti-coagulation viscosity-reducing agent for fracturing fluid, wherein the stirring speed of water is 300r / min, nano The dropping rate of the emulsion components is 1mL / min, and the particle size of the anti-condensation and viscosity-reducing agent for fracturing fluid is 144nm.

[0042] Mix the above-mentioned fracturing fluid with an anti-coagulation viscosity-reducing agent according to the oil-water ratio of 3:7, stir at 50°C for 10 minutes at a stirring speed of 1500 rad / min, and then use a six-speed viscometer (the speed of the viscometer is 300) to test the viscosity ;...

Embodiment 2

[0044] The difference between embodiment 2 and embodiment 1 is that in embodiment 2, by weight percentage, get 15% cyclohexane, 30% water, 15% fatty alcohol polyoxyethylene ether sodium sulfate (AES), 10% Tween80, 20% ethyl acetate and 10% propylene glycol butyl ether were mixed evenly in the reactor. The particle size of the anti-condensation viscosity-reducing agent for fracturing fluid was 127nm, and the viscosity-reducing rate was 79.59%. The rate is 40.12%.

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Abstract

The invention provides a nano-emulsion composition, a nano-emulsion, a preparation method of the nano-emulsion, an anti-coagulation viscosity reducer for fracturing fluid and a preparation method of the anti-coagulation viscosity reducer. The nano-emulsion composition comprises the following components in percentage by mass: 15-60% of a surfactant A, 10-20% of a surfactant B, 10-30% of a cosurfactant, 5-20% of an oil phase and 5-30% of water, and the mass ratio of the surfactant A to the surfactant B is (1.5-3): 1. The surfactant A is one or more of fatty alcohol polyoxyethylene ether sulfate, castor oil polyoxyethylene ether and nonylphenol polyoxyethylene ether sulfate, and the surfactant B is one or more of polyacrylic acid higher ester, alkyl trimethyl ammonium chloride and polyoxyethylene sorbitan fatty acid ester. The anti-coagulation viscosity reducer containing the nano-emulsion composition for the fracturing fluid can reduce the viscosity of crude oil of a tight oil reservoir and reduce wax crystal convergence, and has the advantages of high efficiency, safety, lower production cost and the like.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a nanoemulsion composition, a nanoemulsion and a preparation method thereof, and a viscosity-reducing agent for fracturing fluid and a preparation method thereof. Background technique [0002] The components of crude oil in most tight oil reservoirs in China are complex, containing a large amount of macromolecular organic matter such as wax, colloid, and asphaltenes, and a small amount of heavy metals. The density and viscosity of crude oil in oil reservoirs are much greater than the light crude oil in tight oil reservoirs in North America, thus greatly reducing the recovery rate of crude oil in tight oil reservoirs. In addition, due to the poor mobility of this crude oil, the complex fracture network created by hydraulic fracturing cannot make it produce efficiently, thus limiting the economical and efficient development of tight oil reservoirs. Therefore, during...

Claims

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Application Information

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IPC IPC(8): C09K8/524C09K8/68
CPCC09K8/524C09K8/602C09K8/604C09K8/68C09K8/885C09K8/882
Inventor 石善志于会永郁洁郭长永何小东承宁陈进马俊修李源梁天博
Owner PETROCHINA CO LTD
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