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Drag reducer and preparation method and application thereof

A technology of drag reducer and emulsifier, which is applied in the field of drag reducer and its preparation, and drag reducer, which can solve the problems of crude oil displacement and high interfacial tension of drag reducer, so as to reduce the flow resistance of crude oil and reduce the oil-water interface Tension, raw materials can be selected from a wide range of effects

Active Publication Date: 2016-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a drag reducer and its preparation method and application, which are used to solve the defect that the interfacial tension of the drag reducer in the slick water fracturing fluid is too large and cannot efficiently displace crude oil in the oil reservoir in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Preparation of high molecular weight polymer

[0031] Mix 3.5 parts by weight of an emulsifier composed of Tween-80 and nonylphenol polyoxyethylene ether with 45 parts by weight of solvent oil composed of cyclohexane and white oil to make an oil phase solvent, wherein Tween-80 and nonyl The mass ratio of phenol polyoxyethylene ether is 4:5, and the mass ratio of cyclohexane to white oil is 4:1. After stirring for 20 minutes, add 7 parts by weight of lipophilic acrylic monomer composed of ethyl methacrylate and methoxy polyethylene glycol methacrylate to the oil phase solvent, wherein ethyl methacrylate and methoxy The mass ratio of the base polyethylene glycol methacrylate was 1.5:1, and the mixture was kept stirring for 30 minutes to obtain an oil phase mixed solution.

[0032] Add 20 parts by weight of a hydrophilic monomer composed of dimethylacrylamide and methacrylic acid to 42 parts by weight of water, wherein the mass ratio of dimethylacrylamide to methacryli...

Embodiment 2

[0040] 1. Preparation of high molecular weight polymer

[0041] 4 parts by weight of an emulsifier composed of Tween-40 and dodecylphenol polyoxyethylene ether are mixed with 47 parts by weight of solvent oil composed of xylene and kerosene to make an oil phase solvent, wherein Tween-40 and dodecylphenol The mass ratio of alkylphenol polyoxyethylene ether is 2:5, and the mass ratio of xylene to kerosene is 1:3. After stirring for 10 min, add 8.5 parts by weight of lipophilic acrylic monomers composed of ethyl acrylate and stearyl acrylate to the oil phase solvent, wherein the mass ratio of ethyl acrylate to stearyl acrylate is 1.5:4, keeping Stir for 25 min to obtain a mixed solution of oil phase.

[0042] Add 27 parts by weight of a hydrophilic monomer composed of methylolacrylamide and acrylic acid to 45 parts by weight of water, wherein the mass ratio of methylolacrylamide to acrylic acid is 1:1. After stirring for 10 min, the pH value of the solution was adjusted to 8 wi...

Embodiment 3

[0050] 1. Preparation of high molecular weight polymer

[0051] Mix 5 parts by weight of an emulsifier composed of Tween-20 and dinonylphenol polyoxyethylene ether with 45 parts by weight of solvent oil composed of toluene and cyclopentane to make an oil phase solvent, wherein Tween-20 and dinonylphenol The mass ratio of phenol polyoxyethylene ether is 1:1, and the mass ratio of cyclopentane to toluene is 2:1. After stirring for 15 minutes, add 5 parts by weight of lipophilic acrylic monomers composed of butyl acrylate and hexyl acrylate to the oil phase solvent, wherein the mass ratio of butyl acrylate to hexyl acrylate is 2:1, and keep stirring for 20 minutes , to obtain an oil phase mixed solution.

[0052] Add 28 parts by weight of a hydrophilic monomer composed of dimethylacrylamide, acrylic acid and acrylamide to 50 parts by weight of water, wherein the mass ratio of methacrylamide, acrylic acid and acrylamide is 2:1:1. After stirring for 20 min, the pH value of the so...

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PUM

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Abstract

The invention provides a drag reducer and preparation method and application thereof. The preparation method of the drag reducer comprises the following steps that 1, 3-5 g of an emulsifying agent and 40-50 parts of solvent oil are mixed by weight to obtain an oil phase solvent, 5-10 parts of oleophylic allyl monomer is added into the oil phase solvent by weight to obtain an oil phase mixing solution; 2, 20-30 parts of hydrophilic allyl monomer is added into 30-50 parts of water by weight, the pH value is adjusted, and a water phase solution is obtained; 3, the water phase solution is added into an oil phase mixing solution, 0.25-0.45 part of an initiator is added by weight, and a high-molecular polymer is obtained; 4, 50-72 parts of an amphiprotic surface active agent and 20-41 parts of a non-ionic surface active agent and 5-10 parts of an anionic surfactant are mixed, and a surface active agent system is obtained; 5, 55-75 parts of the surface active agent system is added into 25-45 parts of high-molecular polymer in batches, and the drag reducer is obtained. The interface tension of the drag reducer obtained through the preparation method can reach 10<-3>-10<-4> mN / m, the drag reduction effect is good, and the good oil displacement effect is achieved.

Description

technical field [0001] The invention relates to a drag reducer, in particular to a drag reducer and its preparation method and application, and belongs to the field of oilfield production increase. Background technique [0002] Tight unconventional reservoirs are characterized by low porosity and low permeability, making exploration and development difficult. Most tight oil wells require reservoir reconstruction to obtain ideal production. At present, the most important production stimulation measure for the development of tight unconventional reservoirs at home and abroad is drag reduction fracturing, that is, using slick water fracturing fluid for volume stimulation, and increasing the fracture complexity and volume of oil wells through slick water fracturing fluid, so that Contribute to the outflow of oil and gas to increase oil and gas production. [0003] Drag reducer is an important part of slick water fracturing fluid, mainly used to reduce the frictional resistance ...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/602C09K8/604C09K8/68C09K8/882C09K2208/28
Inventor 刘锦李忠兴慕立俊赵振峰李宪文薛小佳唐梅荣李楷吴江吕海燕范华波郭钢安杰
Owner PETROCHINA CO LTD
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