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Oil-resistant, anti-adsorption, low-tension foam oil displacement agent and its preparation method and application

A foam flooding and anti-adsorption technology, which is applied in chemical instruments and methods, earthwork drilling and production, wellbore/well components, etc., can solve the problem that oil resistance and anti-adsorption are not mentioned, and can not effectively improve formation heterogeneity Sex, anti-adsorption and other issues are not mentioned, to achieve the effect of reducing construction costs, improving heterogeneity, and reducing waste

Active Publication Date: 2022-03-22
SHANDONG XINGANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in actual field applications, when the foam encounters residual oil or a large "oil wall" in the formation, the foam will defoam and it will be difficult to form foam again, and then the heterogeneity of the formation cannot be effectively improved; when the formation When the mud content is high and the adsorption capacity of the foaming agent is large, it is also necessary to improve the anti-adsorption of the foaming agent to reduce unnecessary waste
Existing patents CN101717627A, CN102020981A, CN103740357A, and CN106590564A all disclose a kind of low-tension foaming agent. Although the oil-water interfacial tension of these foaming agents can reach ultra-low value and strong foaming ability, their oil resistance and adsorption resistance have not improved. And; although the ultra-low interfacial tension foam flooding system disclosed in the patent CN105154055A has the characteristics of ultra-low interfacial tension and good oil resistance, it does not mention its anti-adsorption property

Method used

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  • Oil-resistant, anti-adsorption, low-tension foam oil displacement agent and its preparation method and application
  • Oil-resistant, anti-adsorption, low-tension foam oil displacement agent and its preparation method and application
  • Oil-resistant, anti-adsorption, low-tension foam oil displacement agent and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0040] Add 200kg of water into the reactor, control the temperature at 50°C, add 100kg of cocoic acid monoisopropanolamide, stir to dissolve and mix well, then add 400kg of fatty alcohol polyoxyethylene ether glucoside (R 1=12, m=2, n=3) and 100kg ethanol, stirred and dissolved evenly, then added 200kg α-sodium olefin sulfonate (R 2 =9, n=2), and stir evenly to obtain an oil-resistant, anti-adsorption and low-tension foam oil displacement agent.

Embodiment 2

[0042] Add 200kg of water into the reactor, control the temperature at 52°C, add 110kg of lauric acid monoisopropanolamide, stir to dissolve and mix well, then add 380kg of fatty alcohol polyoxyethylene ether glucoside (R 1 =13, m=2, n=4) and 90kg methanol, stir and dissolve evenly, then add 220kg α-sodium olefin sulfonate (R 2 =10, n=3), and stir evenly to obtain an oil-resistant, anti-adsorption, low-tension foam oil displacement agent.

Embodiment 3

[0044] Add 200kg of water into the reactor, control the temperature at 54°C, add 120kg of cocoic acid monoisopropanolamide, stir to dissolve and mix well, then add 360kg of fatty alcohol polyoxyethylene ether glucoside (R 1 =14, m=2, n=3) and 80kg of isopropanol, stirred and dissolved evenly, then added 240kg of sodium α-alkenyl sulfonate (R 2 =13, n=1), and stir evenly to obtain an oil-resistant, anti-adsorption and low-tension foam oil displacement agent.

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Abstract

The invention proposes an oil-resistant, anti-adsorption, low-tension foam oil displacement agent and its preparation method and application, belonging to the technical field of oil displacement agents, to solve the problem that existing foam oil displacement agents cannot simultaneously have oil resistance, anti Absorptive technical issues. The oil-resistant, anti-adsorption and low-tension foam oil displacement agent provided by the present invention comprises 30-40% fatty alcohol polyoxyethylene ether glucoside, 20-30% α-alkenyl sulfonate, 10-15% coconut Oleic / lauric monoisopropanolamide and 5‑10% lower alcohols, and the balance water. The foam oil displacement agent provided by the invention has good oil resistance and adsorption resistance while meeting the predetermined characteristics of the foam oil displacement agent, and can effectively improve recovery and reduce waste in actual field application, and meets the requirements of green environmental protection.

Description

technical field [0001] The invention belongs to the technical field of oil-displacing agents, and in particular relates to an oil-resistant, anti-adsorption, low-tension foam oil-displacing agent and a preparation method and application thereof. Background technique [0002] Most of my country's oilfields have entered the stage of high water cut or even extremely high water cut development, how to effectively develop such oilfields has become a major issue in the study of enhanced oil recovery. On the one hand, the foam system can reduce the interfacial tension of oil and water, and promote the improvement of oil displacement efficiency; on the other hand, it can also reduce the mobility ratio of oil and water, thereby improving the sweep efficiency. Due to various advantages of foam system, it has been widely used in tertiary oil recovery. [0003] The instability of foam in contact with oil restricts the development of foam flooding technology. When it is applied to most ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C09K8/584C09K8/518C09K8/506
CPCC09K8/584C09K8/518C09K8/506E21B43/16
Inventor 祝东明姜力华秦玉斌胡朋朋丁锡刚吴庆凯李金平李慎伟杨姗齐书磊
Owner SHANDONG XINGANG CHEM
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