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Viscosity-reducing oil-displacing agent for viscosity-reducing combination flooding of common heavy oil reservoir as well as preparation method and application thereof

A technology of viscous oil displacement agent for heavy oil reservoirs, applied in the direction of chemical instruments and methods, earthwork drilling and production, drilling compositions, etc., can solve the problems not mentioned, and achieve the improvement of anti-adsorption and easy purchase of raw materials , The effect of simple production process

Active Publication Date: 2021-11-02
SHANDONG XINGANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it only mentioned the oil displacement efficiency index of the system in the indoor evaluation, and did not mention other indexes that may affect the field use effect

Method used

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  • Viscosity-reducing oil-displacing agent for viscosity-reducing combination flooding of common heavy oil reservoir as well as preparation method and application thereof
  • Viscosity-reducing oil-displacing agent for viscosity-reducing combination flooding of common heavy oil reservoir as well as preparation method and application thereof
  • Viscosity-reducing oil-displacing agent for viscosity-reducing combination flooding of common heavy oil reservoir as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 300kg of water into the reaction kettle, control the temperature at 40°C, add 200kg of isopropanolamide, 100kg of cocoyl hydroxyethyl imidazoline and 100kg of ethanol, stir well, then add 300kg of nano-viscosity reducer VR-WX302S, fully After being evenly stirred, a viscosity-reducing oil displacement agent for viscosity-reducing composite flooding of ordinary heavy oil reservoirs is obtained.

Embodiment 2

[0027] Add 310kg of water into the reaction kettle, control the temperature at 42°C, add 180kg of isopropanolamide, 90kg of cocoyl hydroxyethyl imidazoline and 100kg of isopropanol, stir well, and then add 320kg of nano-viscosity reducer VR-WX302S , after being fully stirred evenly, a viscosity-reducing oil-displacing agent for ordinary heavy oil reservoirs is obtained.

Embodiment 3

[0029] Add 320kg of water into the reaction kettle, control the temperature at 44°C, add 160kg of isopropanolamide, 80kg of cocoyl hydroxyethyl imidazoline and 100kg of ethanol, stir well, then add 340kg of nano-viscosity reducer VR-WX302S, fully After being evenly stirred, a viscosity-reducing oil displacement agent for viscosity-reducing composite flooding of ordinary heavy oil reservoirs is obtained.

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Abstract

The invention provides a viscosity-reducing oil-displacing agent for viscosity-reducing combination flooding of a common heavy oil reservoir as well as a preparation method and application of the viscosity-reducing oil-displacing agent, and belongs to the field of oilfield chemistry. The viscosity-reducing oil-displacing agent for viscosity-reducing combination flooding of the common heavy oil reservoir, provided by the invention, comprises the following components in percentage by mass: 30-40% of a nano viscosity reducer, 10-20% of isopropanolamide, 5-10% of imidazoline, 10% of low-carbon alcohol and the balance of water. The viscosity-reducing oil-displacing agent provided by the invention is mainly applied to viscosity-reducing combination flooding of a common heavy oil reservoir, and by compounding with a polymer, the dual effects of viscosity-reducing chemical flooding and polymer flooding are exerted, so that the viscosity-reducing oil-displacing agent not only can reduce the viscosity and wash oil, but also can enlarge the swept volume, and can effectively improve the recovery ratio of the common heavy oil reservoir.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry, and in particular relates to a viscosity-reducing oil-displacing agent for common heavy oil reservoir viscosity-reducing composite flooding and a preparation method and application thereof. Background technique [0002] In recent years, heavy oil chemical cold recovery enhanced oil recovery technology has received more and more attention, and the viscosity-reducing composite flooding technology that uses polymer and water-soluble viscosity-reducing oil displacement agent to displace heavy oil is one of the important technologies. research direction. [0003] The application of polymers in chemical flooding has been relatively mature. By increasing the viscosity of the water phase and reducing the water-oil mobility ratio, polymers can play a role in regulating and flooding, expand the swept volume, and then improve the recovery factor. The viscosity-reducing composite flooding technology is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588C09K8/58C09K8/524E21B43/16
CPCC09K8/584C09K8/588C09K8/58C09K8/524E21B43/16
Inventor 姜力华祝东明秦玉斌齐高政丁锡刚吴庆凯李金平胡朋朋
Owner SHANDONG XINGANG CHEM
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