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A kind of method for preparing viscosity reducer by microbial fermentation

A technology of microbial fermentation and viscosity reducing agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor salt resistance and temperature resistance, poor viscosity reducing effect of viscosity reducing agent, and low viscosity reducing rate. Achieve good viscosity reduction effect, improve viscosity reduction rate, salt and temperature resistance, and easy degradation

Active Publication Date: 2019-02-19
克拉玛依市新奥达石油技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the disadvantages of poor viscosity reducing effect, low viscosity reducing rate, and poor salt and temperature resistance of the viscosity reducer, a method of mixing and fermenting the biogas liquid with the fermentation medium is provided, which is obtained by centrifugation. The supernatant is mixed with absolute ethanol and allowed to stand for stratification to obtain an organic phase, which is subjected to vacuum distillation and water bath reaction to obtain a modified oil mixture, and castor oil, concentrated sulfuric acid, etc. to prepare a sulfonated castor oil mixture, etc. Mixing to prepare a viscosity-reducing base material, and then stirring and mixing with sodium stearate to obtain a viscosity-reducing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First, weigh 50g of glucose, 10g of yeast extract, 8g of peptone, 4g of ammonium sulfate, 2g of dipotassium hydrogen phosphate, and 800mL of deionized water in sequence, stir them evenly, put them into a sterilizing tank, and sterilize at 100°C for 10 minutes to obtain a fermentation culture base, put it in a fermenter, and then filter the biogas liquid to obtain the filtrate, take 200mL of the filtrate and add it to the fermenter, then add 100mL of disodium hydrogen phosphate-sodium hydroxide buffer solution with a pH of 6.5, and ferment at 25°C for 2 day, then raise the temperature to 35°C and ferment for 1 day, after the fermentation is over, raise the temperature to 100°C, stir for 10 minutes, then place it in a centrifuge, centrifuge at 6000r / min for 30 minutes, and collect the supernatant; then add the above supernatant to Add 100mL of petroleum ether to the beaker, stir for 10min, let stand to separate layers, collect the organic phase, distill the organic phase u...

example 2

[0018]First, weigh 55g of glucose, 11g of yeast extract, 10g of peptone, 5g of ammonium sulfate, 3g of dipotassium hydrogen phosphate, and 900mL of deionized water in sequence, stir them evenly, put them into a sterilizing tank, and sterilize at 105°C for 15 minutes to obtain a fermentation culture base, put it in a fermenter, and then filter the biogas liquid to obtain the filtrate, take 250mL of the filtrate and add it to the fermenter, then add 150mL of disodium hydrogen phosphate-sodium hydroxide buffer solution with a pH of 6.7, and ferment at 30°C for 3 day, then raised the temperature to 40°C and fermented for 2 days, after the fermentation was over, raised the temperature to 105°C, stirred for 15 minutes, then placed in a centrifuge, centrifuged at 6500r / min for 35 minutes, and collected the supernatant; then added the above supernatant to Add 150mL petroleum ether to the beaker, stir for 15min, let stand to separate layers, collect the organic phase, distill the organi...

example 3

[0020] First, weigh 60g of glucose, 12g of yeast extract, 12g of peptone, 6g of ammonium sulfate, 4g of dipotassium hydrogen phosphate, and 1000mL of deionized water in sequence, stir them evenly, put them into a sterilizing tank, and sterilize at 110°C for 20 minutes to obtain a fermentation culture base, put it in the fermenter, and then filter the biogas liquid to obtain the filtrate, take 300mL of the filtrate and add it to the fermenter, then add 200mL of disodium hydrogen phosphate-sodium hydroxide buffer solution with a pH of 6.8, and ferment at 35°C for 3 day, and then raised the temperature to 45°C for 2 days of fermentation. After the fermentation was completed, the temperature was raised to 110°C, stirred for 20 minutes, then placed in a centrifuge, centrifuged at 7000r / min for 40 minutes, and the supernatant was collected; then the above supernatant was added to Add 200mL of petroleum ether to the beaker, stir for 20min, let stand to separate layers, collect the org...

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Abstract

The invention discloses a method for preparing a viscosity reducer by microbial fermentation and belongs to the technical field of viscosity reducer preparation. The method comprises the following steps: mixing biogas broth and a fermentation medium and fermenting, centrifuging to obtain a supernatant, mixing the supernatant and anhydrous ethanol and standing for layering so as to obtain an organic phase, carrying out reduced pressure distillation and a water-bath reaction to prepare modified oil and fat mixed liquor, mixing the modified oil and fat mixed liquor and sulfonated castor oil mixed liquor prepared from castor oil, concentrated sulfuric acid and the like to prepare a viscosity reduction base-material, and stirring and mixing the viscosity reduction base-material and sodium stearate, etc. so as to prepare the viscosity reducer. The invention has the following beneficial effects: the preparation steps are simple; by the microbial fermentation method for preparation of the viscosity reducer, viscosity reduction rate and salt resistance and temperature resistance of the viscosity reducer are effectively enhanced, and pertinence is strong; and the product has a good viscosity reduction effect, is safe and environment-friendly, and is easy to degrade.

Description

technical field [0001] The invention relates to a method for preparing a viscosity reducer by microbial fermentation, and belongs to the technical field of viscosity reducer preparation. Background technique [0002] Petroleum resources exist in naturally formed oil reservoirs, and their exploitation techniques vary with the types of reservoirs and the characteristics of crude oil. Heavy oil generally refers to crude oil with high viscosity and high relative density, that is, high-viscosity heavy crude oil. Heavy oil is called heavy crude oil abroad, and heavy oil with extremely high viscosity is called asphalt or tar sands oil. Due to the high viscosity and large flow resistance of heavy oil in the oil layer, steam flooding and other methods are usually used to exploit heavy oil; deep well / ultra-deep well reservoir temperature is relatively high, and it can flow under reservoir conditions. The main problem is that with the wellbore lifting, The viscosity of crude oil grad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/58C09K8/584C09K8/524
CPCC09K8/524C09K8/58C09K8/584
Inventor 雷春生邹宇帆孟中立
Owner 克拉玛依市新奥达石油技术服务有限公司
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