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Low-temperature-resistant online variable-viscosity agent and preparation method thereof

A low-temperature and viscosity-resistant technology, which is applied in the preparation of low-temperature online viscosity-changing agent composition, low-temperature online viscosity-changing agent and its preparation field, can solve the problems of not being able to be used as a drag reducer, and is not easy to stick and break milk, extend the shelf life, and stabilize the system

Active Publication Date: 2021-06-22
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the CN201811646387.2 patent application is a temperature-resistant and salt-resistant fracturing fluid thickener, which cannot be used as a drag reducer, and the product is a dry powder granular product, and the dissolution and aging time is more than 1 hour during use.

Method used

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  • Low-temperature-resistant online variable-viscosity agent and preparation method thereof
  • Low-temperature-resistant online variable-viscosity agent and preparation method thereof
  • Low-temperature-resistant online variable-viscosity agent and preparation method thereof

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preparation example Construction

[0036] In the second aspect, the present invention provides a method for preparing an anti-low temperature online viscosifying agent, the anti-low temperature online viscosifying agent adopts the composition for preparing an anti-low temperature online viscosifying agent described in the first aspect of the present invention Prepared, the composition used to prepare the anti-low temperature online viscosity change agent described in the present invention is the raw material for preparing the low temperature online viscosity change agent, and the preparation method includes the following steps:

[0037] (a) Mix acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, methacryloyloxyethyl-N,N-dimethylpropanesulfonate, structure modifier and water to obtain The first mixed solution, then adding sodium hydroxide to the first mixed solution to adjust the pH value of the first mixed solution is 6.5~7.5 (such as 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2 , 7.3, 7.4 or 7.5) is preferably 7....

Embodiment 1

[0061] The composition used to prepare the anti-low temperature online viscosity change agent in this embodiment is composed of a dispersed water phase, a continuous oil phase and a process treatment agent;

[0062] The dispersed aqueous phase is composed of the following components in parts by weight:

[0063] 100 parts of acrylamide, 150 parts of 2-acrylamide-2-methylpropanesulfonic acid, 40 parts of methacryloyloxyethyl-N,N-dimethylpropanesulfonate, N-octadecylpropene 5 parts of amide (long-chain flexible monomer), 29 parts of sodium hydroxide, 0.05 parts of N,N-methylenebisacrylamide (structure regulator), 50 parts of sodium chloride (point depressant), 300 parts of water;

[0064] The continuous oil phase is composed of the following components in parts by weight:

[0065] Qilu Petrochemical Shengli Oil Refinery D110 white oil (oily solvent) 200 parts, Span 80 emulsifier 13.1 parts, isomerized tridecyl alcohol polyoxyethylene ether 1307 emulsifier 6.9 parts, hydrophobic ...

Embodiment 2

[0076] The composition used to prepare the anti-low temperature online viscosity change agent in this embodiment is composed of a dispersed water phase, a continuous oil phase and a process treatment agent;

[0077] The dispersed aqueous phase is composed of the following components in parts by weight:

[0078] 125 parts of acrylamide, 175 parts of 2-acrylamide-2-methylpropanesulfonic acid, 50 parts of methacryloyloxyethyl-N,N-dimethylpropanesulfonate, methacrylamide 18 8 parts of alcohol polyoxyethylene ether (long-chain flexible monomer), 33.5 parts of sodium hydroxide, 0.1 part of pentaerythritol triallyl ether (structure modifier), 65 parts of sodium acetate (point depressant), 260 parts of water;

[0079] The continuous oil phase is composed of the following components in parts by weight:

[0080] Qilu Petrochemical Shengli Oil Refinery D110 white oil (oily solvent) 230 parts, cetearyl polyoxyethylene ether-10 emulsifier 12.6 parts, propylene glycol block polyether L61 e...

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Abstract

The invention relates to a low-temperature-resistant online variable-viscosity agent and a preparation method thereof. The method comprises the following steps: fully and uniformly mixing a water-phase solution, an oil-phase solution, an azo initiator and an oxidizing agent, emulsifying, pumping a reducing agent to initiate polymerization, adding a long-chain flexible monomer in the polymerization process, adding a hydrolytic agent for hydrolysis after the reaction is finished, adding a phase inversion agent after the hydrolysis is finished, and uniformly stirring to obtain the variable-viscosity agent. The aqueous phase solution is prepared from acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, methacryloyloxyethyl-N, N-dimethyl propanesulfonate, sodium hydroxide, a structure regulator, a pour point depressant and water; the oil phase solution comprises an oily solvent, an emulsifier, a suspending aid and a penetrant. The variable-viscosity agent prepared by the invention has the characteristic of dual purposes, has an extremely high drag reduction effect under the condition of a low-concentration polymer solution, and has an extremely good thickening and sand-carrying effect after the concentration of the polymer is properly increased.

Description

technical field [0001] The invention relates to the technical field of oil field fracturing stimulation, in particular to a composition for preparing an anti-low temperature on-line viscosity change agent, an anti-low temperature on-line viscosity change agent prepared by using the composition and a preparation method thereof. Background technique [0002] Among the proven oil and gas reserves in recent years, the proportion of low-permeability reserves has increased year by year. Low permeability oil and gas reservoirs have low permeability, low porosity, and strong heterogeneity. Most oil and gas wells must implement fracturing stimulation measures before they can see productivity. The role of fracturing stimulation technology in the development of low permeability oil and gas reservoirs is becoming more and more obvious. [0003] Due to the advancement of fracturing fluid technology and the requirements of oil field construction, the online fracturing fluid construction t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/56C08F220/38C08F220/54C08F222/38C08F2/44C09K8/64C09K8/88
CPCC08F220/585C08F2/44C09K8/64C09K8/882C09K2208/28C08F220/56C08F220/387C08F220/54C08F222/385
Inventor 荣敏杰孙建波许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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