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Viscosity reducer for oil exploitation and preparation method thereof

A technology for viscosity reducer and petroleum, applied in the field of viscosity reducer for petroleum development and its preparation, can solve the problems of high viscosity and difficult to degrade heavy oil, few studies on hydrocarbon-solving bacteria, difficult to control the proportion, etc., and achieves good emulsion stability. , the effect of promoting the application value and improving the efficiency

Active Publication Date: 2021-11-16
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of the adaptability of the strains and the different environmental conditions for these two methods, it is difficult to control the ratio of the addition of the agent, and there are few optimization studies.
And because heavy oil has a high viscosity and is difficult to degrade, there are few studies on hydrocarbon-degrading bacteria for heavy oil

Method used

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  • Viscosity reducer for oil exploitation and preparation method thereof
  • Viscosity reducer for oil exploitation and preparation method thereof

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preparation example Construction

[0034] A preparation method of a viscosity reducer for petroleum exploitation, comprising the steps of:

[0035] (1) Preparation of microbial inoculum:

[0036] A. Take the microbial strains and inoculate them in the LB medium, carry out the activation treatment, carry out the sonic treatment of 30~50kHz at the same time of the activation treatment, after the completion, the microbial bacterial liquid is ready for use, and the components and the corresponding weight percentages in the microbial strains are: 10-12% of Bacillus licheniformis, 10-12% of Bacillus subtilis, 6-10% of Rhodococcus, and the balance is XJBM Pseudomonas aeruginosa;

[0037] B. Subculture the activated microbial bacterium liquid in operation A;

[0038] C. Expand the culture of the microbial liquid obtained after subculture in operation B, and then perform centrifugation-vortex-centrifugation on the obtained bacterial liquid alternately, centrifuge at 4000-5000rpm for 10-16min, and vortex at 2000-3000rpm...

Embodiment 1

[0049] A preparation method of a viscosity reducer for petroleum exploitation, comprising the steps of:

[0050] (1) Preparation of microbial inoculum:

[0051]A. Get microbial strains and inoculate them in LB culture medium, carry out activation treatment, carry out 30kHz acoustic wave treatment at the same time of activation treatment, after finishing, obtain microbial bacterial liquid standby, each composition and corresponding weight percentage in the microbial strains are: licheniformis spores Bacillus 10%, Bacillus subtilis 10%, Rhodococcus 6%, the rest is XJBM

[0052] Pseudomonas aeruginosa;

[0053] B. Subculture the activated microbial bacterium liquid in operation A;

[0054] C. Expand the culture of the microbial bacterial liquid obtained after subculture in operation B, and then perform centrifugation-vortex-centrifugation alternately on the obtained bacterial liquid, centrifuge at 4000rpm for 10min, vortex at 2000rpm for 3min, centrifuge at 8000rpm for 6min, an...

Embodiment 2

[0064] A preparation method of a viscosity reducer for petroleum exploitation, comprising the steps of:

[0065] (1) Preparation of microbial inoculum:

[0066] A. Take the microbial strains and inoculate them in the LB medium, carry out the activation treatment, carry out the sonic treatment of 30~50kHz at the same time of the activation treatment, after the completion, the microbial bacterial liquid is ready for use, and the components and the corresponding weight percentages in the microbial strains are: Bacillus licheniformis 11%, Bacillus subtilis 11%, Rhodococcus 8%, the rest is XJBM

[0067] Pseudomonas aeruginosa;

[0068] B. Subculture the activated microbial bacterium liquid in operation A;

[0069] C. Expand the culture of the microbial liquid obtained after subculture in operation B, and then perform centrifugation-vortex-centrifugation alternately on the obtained bacterial liquid, centrifuge at 4500rpm for 13min, vortex at 2500rpm for 4min, centrifuge at 8500rpm...

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Abstract

The invention discloses a viscosity reducer for oil exploitation and a preparation method thereof, and belongs to the technical field of oil exploitation, and the preparation method comprises the following steps: (1) preparing a microbial agent; (2) preparing a coating material; (3) carrying out coating treatment; (4) carrying out cold plasma treatment; and (5) preparing a finished product. According to the preparation method of the viscosity reducer for petroleum exploitation, the viscosity reducer finally prepared through the method is remarkable in viscosity reduction effect, very high in natural settling dehydration rate, good in emulsion stability, remarkable in effect and excellent in performance, and has very good application and popularization value.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a viscosity reducer for petroleum exploitation and a preparation method thereof. Background technique [0002] My country has 16×10 4 t of heavy oil resources, heavy oil reserves in Northeast China and North China account for a large proportion. The macromolecular structure containing wax crystals, colloids and asphaltene is heavy oil with high viscosity and high density, and the content of colloids and asphaltene is as high as 25% to 50%. This kind of oil has the characteristics of high viscosity, poor fluidity, and is not easy to be extracted; therefore, the viscosity reduction treatment of heavy oil is the key link of heavy oil production. [0003] Microbial viscosity reduction technology uses the metabolic activities and metabolites of bacteria to degrade and emulsify heavy components such as asphaltene in heavy oil to achieve the purpose of visco...

Claims

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Application Information

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IPC IPC(8): C09K8/582
CPCC09K8/582
Inventor 陈立黄德奇汪洋王威
Owner YANGZHOU POLYTECHNIC INST
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