Thickened oil viscosity reduction oil washing agent for synergistic polymer flooding as well as preparation method and application of thickened oil viscosity reduction oil washing agent

A viscous detergent and polymer technology, which is applied in the field of synergistic polymer flooding heavy oil viscosity-reducing detergent and its preparation, can solve the problems of unresolved polymer compounding and improve heavy oil recovery High efficiency, simple preparation process and low cost

Active Publication Date: 2022-07-22
SHANDONG XINGANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN110684519A discloses a heavy oil viscosity-reducing oil-displacing agent resistant to stratum adsorption. This patent has good emulsification effect and viscosity-reducing effect on heavy oil, and has relatively strong adsorption resistance. efficiency does not involve
CN113061425A discloses a low-tension heavy oil viscosity-reducing oil washing agent for heavy oil cooling. This patent has a good effect on interfacial tension, and the oil washing efficiency has also been greatly improved, but the compounding property with polymers is not involved.

Method used

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  • Thickened oil viscosity reduction oil washing agent for synergistic polymer flooding as well as preparation method and application of thickened oil viscosity reduction oil washing agent
  • Thickened oil viscosity reduction oil washing agent for synergistic polymer flooding as well as preparation method and application of thickened oil viscosity reduction oil washing agent
  • Thickened oil viscosity reduction oil washing agent for synergistic polymer flooding as well as preparation method and application of thickened oil viscosity reduction oil washing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In the reaction vessel, successively add sodium lauryl isethionate 35g, ɑ-iminoacetic acid 30g (R 1 =8, R 2 = 8), 20 g of fatty alcohol polyoxyethylene ether glucoside (n = 10, R = 12), 10 g of ethanol and 5 g of water, and stirred evenly at 50° C. to obtain a heavy oil viscosity-reducing oil wash for synergistic polymer flooding .

Embodiment 2

[0030] In the reaction vessel, successively add sodium cocoyl isethionate 35g, ɑ-iminoacetic acid 20g (R 1 =10, R 2 =8), 10 g of fatty alcohol polyoxyethylene ether glucoside (n = 12, R = 13), 15 g of methanol and 20 g of water, and stirred uniformly at 50° C. to obtain a heavy oil viscous-reducing and washing oil for polymer flooding.

Embodiment 3

[0032] In the reaction vessel, successively add sodium dodecylbenzenesulfonate 25g, ɑ-iminoacetic acid 30g (R 1 =12, R 2 =8), 10 g of fatty alcohol polyoxyethylene ether glucoside (n = 13, R = 14), 10 g of isopropanol and 25 g of water, and stirred evenly at 50° C. to obtain a heavy oil for polymer flooding, viscosity-reducing and washing oil .

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Abstract

The invention provides a thickened oil viscosity-reducing oil washing agent for synergistic polymer flooding as well as a preparation method and application thereof, and belongs to the technical field of oil exploitation. The thickened oil viscosity-reducing oil washing agent for synergistic polymer flooding provided by the invention comprises the following components in percentage by mass: 25%-35% of an anionic surfactant, 10%-20% of a zwitterionic surfactant, 10%-20% of a nonionic surfactant, 10%-20% of low-carbon alcohol and the balance of water. When the viscosity-reducing oil washing agent provided by the invention is applied to the recovery of heavy oil with the formation temperature of 70 DEG C and the crude oil viscosity of 1314 mPa.s, the interfacial tension is less than or equal to 8.9 * 10 <-2 >, the viscosity reduction rate is greater than or equal to 81.7%, the oil washing efficiency is greater than or equal to 42.1%, the polymer viscosity retention rate is greater than or equal to 97.4%, the effect is remarkable, and the preparation process is simple, low in cost and green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a viscosity-reducing oil cleaning agent for high-efficiency polymer flooding for heavy oil and a preparation method and application thereof. Background technique [0002] With the development of conventional crude oil, its underground reserves have declined significantly, and the heavy oil resources with huge reserves will occupy an increasing proportion in the future oil exploitation, while the residual oil of heavy oil after conventional water flooding is relatively large. Explore these heavy oil resources The mining method has become an important issue in the future. [0003] Both polymer flooding and emulsification viscosity reduction flooding technology have broad application prospects in enhancing the recovery of heavy oil. The polymer is injected into the crude oil reservoir. Due to the low mobility of the injected water, the permeability of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/60E21B43/22
CPCC09K8/584C09K8/604C09K8/602E21B43/16
Inventor 祝东明姜力华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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