Oil-resistant adsorption-resistant low-tension foam oil-displacing agent and preparation method and application thereof

A foam flooding and anti-adsorption technology, which is applied in chemical instruments and methods, earthwork drilling, and fluid production, etc. Adsorption is not mentioned, to achieve the effect of reducing construction cost, improving heterogeneity, and easy purchase of raw materials

Active Publication Date: 2020-11-13
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 adsorption-resistant low-tension foam oil-displacing agent and preparation method and application thereof
  • Oil-resistant adsorption-resistant low-tension foam oil-displacing agent and preparation method and application thereof
  • Oil-resistant adsorption-resistant low-tension foam oil-displacing agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
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 provides an oil-resistant adsorption-resistant low-tension foam oil-displacing agent and a preparation method and application thereof, belongs to the technical field of oil-displacing agents, and aims to solve the technical problem that an existing foam oil-displacing agent cannot have oil resistance and adsorption resistance at the same time on the premise of meeting set performance. The oil-resistant adsorption-resistant low-tension foam oil-displacing agent is prepared from the following components in percentage by mass: 30 to 40 percent of fatty alcohol-polyoxyethylene etherglucoside, 20 to 30 percent of alpha-alkenyl sulfonate, 10 to 15 percent of coconut oil acid / lauric acid monoisopropanolamide, 5 to 10 percent of low-carbon alcohol and the balance of water. The foamoil-displacing agent has good oil resistance and adsorption resistance while meeting the established characteristics of the foam oil-displacing agent, can effectively improve the recovery ratio and reduce waste in actual field application, and meets the green and environment-friendly requirements.

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 Applications(China)
IPC IPC(8): C09K8/584C09K8/518C09K8/506E21B43/22
CPCC09K8/584C09K8/518C09K8/506E21B43/16
Inventor 祝东明姜力华秦玉斌胡鹏丁锡刚吴庆凯李金平李慎伟杨珊齐书磊
Owner SHANDONG XINGANG CHEM
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