Polyethyleneimine crosslinking high-temperature water shutoff profile control agent and preparation method thereof

A technology of polyethyleneimine and water profile control agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of no preparation method and achieve the effect of strong plugging effect

Active Publication Date: 2015-04-01
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, foreign papers all mention the performance and application of the polyethyleneimine system, but there is no content about the preparation method of the system

Method used

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  • Polyethyleneimine crosslinking high-temperature water shutoff profile control agent and preparation method thereof
  • Polyethyleneimine crosslinking high-temperature water shutoff profile control agent and preparation method thereof

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Experimental program
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Embodiment

[0032] This embodiment provides a method for preparing polyethyleneimine cross-linked high-temperature water plugging profile control agent, which includes the following steps:

[0033] (1) Preparation of a binary copolymer of acrylamide and tert-butyl acrylate:

[0034] Install the reaction instrument, adjust the electric heating constant temperature water bath to 40°C, and place the three-necked flask with a stirrer inside (the capacity of the three-necked flask is 500mL, weighed before installation) in the water bath;

[0035] Add 80mL of tap water to the above-mentioned three-necked flask, and start the stirrer in the three-necked flask;

[0036] Add 7.126 g of tert-butyl acrylate (tBA) dropwise to the above-mentioned three-necked flask, and add 2.0 g of nonionic surfactant (polyoxyethylene sorbitan monostearate) dropwise, and stir for 30 min;

[0037] Continue to add 35.5g of acrylamide to the above reaction system, add 0.36g of peroxide initiator (ammonium persulfate), ...

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Abstract

The invention provides a polyethyleneimine crosslinking high-temperature water shutoff profile control agent and a preparation method thereof. The method comprises the following steps: (1) preparing a biopolymer of acrylamide and tert-Butyl acrylate; (2) performing cross-linking reaction on the biopolymer obtained in the step 1 and polyethyleneimine to obtain the polyethyleneimine crosslinking high-temperature water shutoff profile control agent. The polyethyleneimine crosslinking high-temperature water shutoff profile control agent prepared through the method can resist high temperature up to 140 DEG C, is relatively high in shutoff effect, and can be used as the high-temperature oil and gas field water shutoff profile control agent.

Description

technical field [0001] The invention relates to a material that can be used as high-temperature oil and gas well water plugging and high-temperature water injection well profile control and its preparation method, in particular to a polyethyleneimine cross-linked high-temperature water plugging profile control agent and its preparation method, belonging to oil field chemical technology field. Background technique [0002] As the development of oil and gas fields continues to advance toward deep high-temperature (90°C-120°C) oil and gas reservoirs, water plugging and profile control agents for high-temperature oil and gas fields have become a research content. The polyacrylamide cross-linking system used in medium and low temperature (30°C-90°C) oil and gas fields degrades severely in high temperature environment and has a short validity period, which loses the significance of industrial application in mine field. Therefore, it is necessary to study high-temperature material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L79/02C08L33/26C08F220/56C08F220/18C08F2/30C09K8/44C09K8/588
Inventor 李宜坤许寒冰刘敏吕静魏发林郭春秋程木伟
Owner PETROCHINA CO LTD
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