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High-paraffin high-temperature high-salinity oil well microorganism paraffin removing and inhibiting agent and preparation method thereof

A microbial, paraffin-removing technology, applied in chemical instruments and methods, cleaning equipment, earth drilling and mining, etc., can solve the problem of high temperature of microorganism paraffin-removing bacteria, poor wax-removing effect, high salinity and low tolerance and other issues, to achieve the effect of low cost, avoid high cost, pertinence and operability

Inactive Publication Date: 2019-02-22
HUBEI SANXIONG TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to, aiming at the deficiencies of the above-mentioned prior art, provide a high-temperature high-mineralization oil well with high wax content to solve the problem of high temperature and low tolerance of high salinity of microbial wax-clearing and anti-wax strains. Microbial wax removal and anti-wax agent for the problem of poor wax effect and preparation method thereof

Method used

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  • High-paraffin high-temperature high-salinity oil well microorganism paraffin removing and inhibiting agent and preparation method thereof
  • High-paraffin high-temperature high-salinity oil well microorganism paraffin removing and inhibiting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Weigh 200 kg of industrial brine with a salt content of 23%, 50 kg of starch, 20 kg of peptone, and 510 kg of water, adjust the pH value of the solution to 7.0-7.2, heat up to 40-55°C and stir evenly, then Sterilize by heating to 125°C for 25 minutes;

[0040] 2. After cooling down to 40-60°C, add 20 kg of yeast extract, 50 kg of Halobacterium species, 50 kg of extreme thermophilic archaea species, and 100 kg of wax-loving species into the fermenter, keeping the temperature at After fermenting at 55-60° C. for 40-48 hours, cool to normal temperature to obtain 1000 kg of microbial paraffin-removing agent for oil wells with high wax content, high temperature and high mineralization.

Embodiment 2

[0042] 1. Weigh 210 kg of industrial brine with a salt content of 23%, 60 kg of starch, 20 kg of peptone, and 460 kg of water, adjust the pH value of the solution to 7.0-7.2, heat up to 40-55°C and stir evenly, then Sterilize by heating to 125°C for 25 minutes;

[0043] 2. After cooling down to 40-60°C, add 20 kg of yeast extract, 60 kg of Halobacterium species, 60 kg of extreme thermophilic archaea species, and 110 kg of wax-loving species into the fermenter, keeping the temperature at After fermenting at 55-60° C. for 44-48 hours, cool to normal temperature to obtain 1000 kg of microbial paraffin-removing and anti-paraffin agent for oil wells with high wax content, high temperature and high mineralization.

Embodiment 3

[0045] 1. Weigh 210 kg of industrial brine with a salt content of 23%, 70 kg of starch, 20 kg of peptone, and 430 kg of water, adjust the pH value of the solution to 7.0-7.2, heat up to 40-55°C and stir evenly, then Sterilize by heating to 125°C for 25 minutes;

[0046] 2. After cooling down to 40-60°C, add 20 kg of yeast extract, 70 kg of Halobacterium species, 70 kg of extreme thermophilic archaea species, and 110 kg of wax-loving species into the fermenter, keeping the temperature at Ferment at 55-60° C. for 46-48 hours and then cool to normal temperature to obtain 1000 kg of microbial paraffin-removing agent for high-waxy, high-temperature, high-mineralized oil wells.

[0047] Table 1 and Table 2 below are performance indicators of the present invention and a comparison with other wax removal and anti-wax technology scopes of application:

[0048] Table 1 Performance Index of Microbial Wax Removing and Preventing Agent of the present invention

[0049]

[0050] Table ...

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Abstract

The invention relates to a high-paraffin high-temperature high-salinity oil well microorganism paraffin removing and inhibiting agent and a preparation method thereof, and belongs to the technical field of tertiary oil recovery of an oil field. The microorganism paraffin removing and inhibiting agent is prepared from the following components in percentage by weight: 5 to 10 percent of halobacterium salinarium, 5 to 10 percent of hyperthermophilic archaeon, 8 to 15 percent of paraffin-thirsty bacteria, 20 to 25 percent of industrial brine, 5 to 10 percent of starch, 0.5 to 3 percent of peptone,0.5 to 3 percent of yeast extract and the balance of water. The preparation method of the microorganism paraffin removing and inhibiting agent comprises the following steps: adding the industrial brine, the starch, the peptone and the water into a fermentation tank, regulating pH (Potential of Hydrogen) value of a solution, rising the temperature to 40 to 55 DEG C, uniformly stirring, then heating to 125 DEG C, and sterilizing for 25 minutes; adding the yeast extract, the halobacterium salinarium, the hyperthermophilic archaeon and the paraffin-thirsty bacteria after cooling to 40 to 60 DEG C, fermenting for 48 hours by keeping the temperature be 55 to 60 DEG C, and cooling to room temperature, thus obtaining the microorganism paraffin removing and inhibiting agent. According to microorganism paraffin removing and inhibiting agent and the preparation method thereof, disclosed by the invention, the problems of low high-temperature high-salinity tolerance and poor paraffin removing andinhibiting effect of microorganism paraffin removing and inhibiting strains at present can be effectively solved.

Description

technical field [0001] The invention relates to a microbial wax removing and preventing agent for high-wax, high-temperature and high-mineralization oil wells and a preparation method thereof, belonging to the technical field of oil field tertiary oil recovery. Background technique [0002] The hydrocarbon mixture with 16-70 carbon atoms in crude oil is called paraffin. During the production process of oil wells, as the temperature of crude oil and formation pressure decrease and the gas continues to escape, the wax in crude oil will crystallize and precipitate. The long-term accumulation deposits on the tubing, casing, sucker rod and surface oil pipeline, causing wax blockage. Once the well with severe wax deposition is shut down, it cannot be normally opened for production. Therefore, wax-deposited wells need regular wax removal and maintenance. At present, the conventional wax removal and anti-wax measures mainly include: mechanical wax removal, hot washing, chemical wax-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524E21B37/06
CPCC09K8/524E21B37/06
Inventor 易绍金吴中贵吴黎黎易东李富华
Owner HUBEI SANXIONG TECH DEV CO LTD
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