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One-dose drag reducer for fracturing and preparation method thereof

A technology of drag reducer and fracturing, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of narrow use range of drag reducer, difficulty in selection and use of drag reducer, different requirements of drag reducer

Active Publication Date: 2021-04-30
SICHUAN WELDON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a one-dose drag reducer for fracturing and its preparation method to solve the problem that the existing drag reducer has a narrow range of use, and the requirements for drag reducer are different under different conditions, resulting in Resist selection and difficulty in use

Method used

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  • One-dose drag reducer for fracturing and preparation method thereof
  • One-dose drag reducer for fracturing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of a one-dose fracturing drag reducer comprises the following steps:

[0027] (1) Preparation of oil phase: weigh 25 parts of 3# white oil, 2 parts of KH590 coupling agent, 0.05 parts of urea, 0.5 parts of glutaraldehyde, 0.5 parts of potassium chloride, 1.5 parts of Op-4 and 1.5 parts of Span 80 and mix Add it into reaction vessel A and stir evenly at a stirring speed of 500r / min to obtain intermediate A;

[0028] (2) Preparation of water phase: Weigh 45 parts of water, 20 parts of acrylamide, 10 parts of acrylic acid, and 5 parts of methyl acrylate, mix them into reaction vessel B, stir until completely dissolved, then transfer to the reaction vessel with mechanical stirring In container C, turn on the mechanical stirring and feed nitrogen gas for 20 minutes, remove the air in the reaction system, then stop the mechanical stirring and stop feeding nitrogen gas, and slowly add intermediate A dropwise to the reaction container C with mechanical st...

Embodiment 2

[0032] The preparation method of a one-dose fracturing drag reducer comprises the following steps:

[0033] (1) Preparation of oil phase: Weigh 10 parts of 3# white oil, 10 parts of 15# white oil, 2 parts of KH570 coupling agent, 0.05 part of lauric acid, 0.5 part of glutaraldehyde, 0.5 part of potassium chloride, 1.5 part of Op -4 and 1.5 parts of Span 80 were mixed and added to reaction vessel A and stirred evenly at a stirring speed of 600r / min to obtain intermediate A;

[0034] (2) Preparation of water phase: Weigh 40 parts of water, 20 parts of acrylamide, 10 parts of acrylic acid, and 5 parts of methyl acrylate, mix them into reaction vessel B, stir until completely dissolved, then transfer to the reaction vessel with mechanical stirring In container C, turn on the mechanical stirring and feed nitrogen gas for 20 minutes, remove the air in the reaction system, then stop the mechanical stirring and stop feeding nitrogen gas, and slowly add intermediate A dropwise to the r...

Embodiment 3

[0038] The preparation method of a one-dose fracturing drag reducer comprises the following steps:

[0039] (1) Preparation of oil phase: weigh 15 parts of methyl oleate, 1 part of KH550 coupling agent, 0.05 part of lauric acid, 1 part of glutaraldehyde, 1 part of potassium chloride, 1 part of Op-4 and 1 part of Span 80 Mix and add to reaction vessel A and stir evenly at a stirring speed of 600r / min to obtain intermediate A;

[0040] (2) Preparation of water phase: Weigh 40 parts of water, 20 parts of acrylamide, 10 parts of acrylic acid, and 5 parts of methyl acrylate, mix them into reaction vessel B, stir until completely dissolved, then transfer to the reaction vessel with mechanical stirring In container C, turn on the mechanical stirring and feed nitrogen gas for 20 minutes, remove the air in the reaction system, then stop the mechanical stirring and stop feeding nitrogen gas, and slowly add intermediate A dropwise to the reaction container C with mechanical stirring. 19...

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Abstract

The invention discloses a one-dose drag reducer for fracturing and a preparation method thereof, and relates to the technical field of oil and gas field development. The preparation raw materials include: acrylamide, functional monomer, oil, initiator, emulsifier, stabilizer, chain termination agent, coupling agent, synergist and water, and its preparation method comprises the following steps: preparing an oil phase to obtain intermediate A, preparing a water phase and slowly adding intermediate A to the water phase, and then sequentially adding initiator and chain Terminator to obtain the finished product. Through the synergistic effect of coupling agent, stabilizer and synergist, the drag reducer has high anti-swelling rate, drag reduction rate and kinematic viscosity, low surface tension and bacterial count, and fast sticking time. ;One dose of drag reducing agent for fracturing has a wide range of applications and can meet the requirements of drag reducing agents under various conditions, making the product itself have excellent drainage performance, high solubility between components, and water quality. High adaptability, high anti-expansion effect and high bactericidal ability.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a one-dose drag reducer for fracturing and a preparation method thereof. Background technique [0002] Hydraulic fracturing is the use of surface high-pressure pumps to squeeze fracturing fluid with high viscosity into the oil layer through the wellbore. When the rate of injection of fracturing fluid exceeds the absorption capacity of the oil layer, a very high pressure will be formed on the oil layer at the bottom of the well. When this pressure exceeds the fracture pressure of the oil layer near the bottom of the well, the oil layer will be pushed open and fractures will be generated. At this time, if the fracturing fluid is continuously squeezed into the oil layer, the fracture will continue to expand into the oil layer. In order to keep the fractures opened, the sand-carrying fluid with proppant (usually quartz sand) is squeezed into the oil layer. Afte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68C08F220/56C08F220/14C08F220/06
CPCC08F220/56C09K8/605C09K8/68C09K8/882C08F220/14C08F220/06
Inventor 何伟王彬代友勋潘铮刘畅
Owner SICHUAN WELDON CHEM
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