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Thick oil viscosity reducing agent prepared from microbial surfactant and preparation method thereof

A technology of surfactant and viscosity reducer for heavy oil, which is applied in the field of preparation of viscosity reducer for heavy oil by using microbial surfactant and can solve the problems of high viscosity, poor fluidity, difficulty in recovery, gathering and transportation of heavy oil, etc. Cost reduction, lower oil-water interfacial tension, and strong salt resistance

Inactive Publication Date: 2018-06-08
DAQING HUALI ENERGY BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy oil contains a large amount of colloid, asphaltenes and a small amount of wax, resulting in high viscosity and poor fluidity, which brings great difficulties to the exploitation and transportation of heavy oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A thick oil viscosity reducer prepared by utilizing microbial surfactant of the present invention is composed of the following components by weight percentage:

[0022] Lipopeptide Alcohol Solution 30~80%

[0023] Anionic surfactant 0.5~5%

[0024] Non-ionic surfactant 0.5~10%

[0025] Alcohol solvent balance.

[0026] Wherein, the solute of the lipopeptide alcohol solution is a lipopeptide, and the solvent is an alcohol solvent, wherein the lipopeptide content is 1 to 10% by weight;

[0027] The anionic surfactant is one of 12-18 sodium alkylbenzene sulfonate, calcium 12-18 alkylbenzene sulfonate, sodium 12-18 alkyl sulfonate, petroleum sulfonate or any weight ratio of more than one combination;

[0028] The nonionic surfactant is fatty acid polyoxyethylene ester, alkanolamide polyoxyethylene ether, fatty amine polyoxyethylene ether, alkyl glycoside, or any combination of more than one by weight;

[0029] The alcohol solvent is one of methanol, ethanol, ethylene g...

Embodiment 2

[0031] Prepare above-mentioned a kind of heavy oil viscosity reducer that utilizes microbial surfactant to prepare, and method is as follows:

[0032] a. Preparation of lipopeptide alcohol solution: use Bacillus subtilis ACCC01430 to prepare lipopeptide biosurfactant after fermentation, then carry out acid precipitation treatment on lipopeptide biosurfactant under the condition of pH=2, and then retain the precipitate and dissolve it in water, filter it with a 100kDa polyethersulfone ultrafiltration membrane, collect the filtrate and lyophilize it, and dissolve the lyophilized powder in an alcohol solvent to obtain a lipopeptide alcohol solution with a lipopeptide content of 1%. Wherein the alcohol solvent is a mixed solution of methanol and ethanol in a weight ratio of 1:3;

[0033] b. Preparation of finished product: at 40°C, mix 30% lipopeptide alcohol solution prepared in step a with 0.5% anionic surfactant and stir for 60 minutes; then add 0.5% nonionic surfactant to the ...

Embodiment 3

[0037] Prepare above-mentioned a kind of heavy oil viscosity reducer that utilizes microbial surfactant to prepare, and method is as follows:

[0038] a. Preparation of lipopeptide alcohol solution: use Bacillus subtilis ACCC01430 to prepare lipopeptide biosurfactant after fermentation, then carry out acid precipitation treatment on lipopeptide biosurfactant under the condition of pH=3, and then retain the precipitate and dissolve it in water, filter it with a 100kDa polyethersulfone ultrafiltration membrane, collect the filtrate and freeze-dry it, and dissolve the freeze-dried powder in an alcohol solvent to obtain a lipopeptide alcohol solution with a lipopeptide content of 10%. Wherein the alcohol solvent is propylene glycol;

[0039] b. Preparation of finished product: at 70°C, mix 60% lipopeptide alcohol solution prepared in step a with 3% anionic surfactant and stir for 120 minutes; then add 5% nonionic surfactant to the mixed liquid agent and the rest of the alcohol so...

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PUM

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Abstract

The invention discloses a thick oil viscosity reducing agent prepared from a microbial surfactant and a preparation method thereof and relates to the technical field of the petrochemical industry. Thethick oil viscosity reducing agent comprises, by weight, 30-80% of a lipopeptide alcohol solution, 0.5-5% of an anionic surfactant, 0.5-10% of a non-ionic surfactant and the balance of an alcohol solvent. The preparation method comprises carrying out microbial fermentation to obtain a lipopeptide product as a surfactant ingredient and carrying out compounding to obtain the thick oil viscosity reducing agent. Compared with the existing viscosity reducing agent, the thick oil viscosity reducing agent has the characteristics of strong salt resistance, high temperature resistance, effective reduction of interfacial tension of oil and water and reduction of surface tension, has thick oil viscosity reducing effects of 80% to 95%, is safe and environmentally friendly and can effectively reduce acost.

Description

technical field [0001] The invention relates to the field of petrochemical technology, in particular to a preparation method of a heavy oil viscosity reducer using a microbial surfactant. Background technique [0002] As a kind of unconventional crude oil, heavy oil accounts for more than 20% of the world's proven crude oil reserves. As the output of light crude oil continues to decrease and the demand for petroleum energy resources increases year by year, it is more urgent to exploit heavy oil to fill the gap. Heavy oil contains a large amount of colloids, asphaltenes and a small amount of wax, resulting in high viscosity and poor fluidity, which brings great difficulties to the exploitation, gathering and transportation of heavy oil. [0003] The research on biosurfactants was first seen in 1946. ZoBell proposed that the surfactant produced by microorganisms is one of the important mechanisms for microorganisms to enhance oil recovery. After the 1960s, the research on the...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 李波高文博王宝柱沈玉江王柱李国军吴连贺冯丽苹王强徐龙广
Owner DAQING HUALI ENERGY BIOLOGICAL TECH
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