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Environment-friendly microbial composite paraffin remover and inhibitor for oil well

An environmentally friendly and microbial technology, applied in wellbore/well components, drilling composition, earthwork drilling and mining, etc., can solve the problem of flammability and explosion of wax remover, great damage to the environment and human body, and weak anti-scouring ability and other problems, to achieve the effects of prolonged action period, fast wax melting rate and strong erosion resistance

Active Publication Date: 2020-09-22
FENGDENG PETROCHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The most commonly used wax removal method is to remove paraffin by chemical method, and dissolve paraffin with organic solvents such as benzene and xylene, but this kind of wax remover is flammable and explosive, and it is harmful to the environment and human body.
However, the existing microbial wax removing and preventing agents on the market have disadvantages such as weak anti-scourability, short action period, and slow wax melting rate.

Method used

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  • Environment-friendly microbial composite paraffin remover and inhibitor for oil well
  • Environment-friendly microbial composite paraffin remover and inhibitor for oil well
  • Environment-friendly microbial composite paraffin remover and inhibitor for oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, the growth conditions of the selected Pseudomonas aeruginosa, Bacillus subtilis and Micrococcus terreus in the crude oil were determined.

[0024] Take three 150mL Erlenmeyer flasks, numbered 1#, 2#, and 3#. After sterilization, add 3g of the crude oil sample in the Jing’an operation area of ​​Changqing Oilfield and 60mL of the nutrient solution for the strains, and insert them into the aeruginosa fake sheets in turn. Bacillus subtilis fermentation broth 1mL, Bacillus subtilis fermentation broth 2mL, Micrococcus terreus fermentation broth 1mL, placed at 30°C under aerobic conditions for constant temperature culture for 5 days, and the growth of each strain in the bacterial suspension was counted by the hemocytometer method . The measurement results are shown in Table 1.

[0025] Table 1, the growth of Pseudomonas aeruginosa, Bacillus subtilis and Micrococcus terreus in high-wax crude oil

[0026] Numbering Microorganism name Number of ...

Embodiment 2

[0029] This example provides a preferred oil well environment-friendly microbial composite paraffin remover.

[0030] The culture and fermentation broths of Pseudomonas aeruginosa, Bacillus subtilis, and Micrococcus terreus were respectively taken, and mixed at a volume ratio of 1:2:1 to obtain a waxy mixed bacterial liquid.

[0031] Weigh 90kg deionized water, 20kg sweet potato powder, 1kg liquid paraffin, 1kg distiller's grains, 1kg agar, 1kgNaCl, 1kgNH 4 Cl, 2kgKH 2 PO4, 1kgCaCl 2 , 1kgNa 2 SO 4 , mixed, and prepared into a strain nutrient solution.

[0032] Compounding 15kg of the above-mentioned paraffinophilic mixed bacterial solution, 15kg of bacterial strain nutrient solution, 5kg of oleic acid amide betaine FDCH-1, 5kg of polyoxyethylene octylphenol ether-10, and 2kg of ethylene glycol monobutyl ether to obtain the described Oil well environment-friendly microbial compound paraffin remover.

[0033] An effect evaluation test was carried out on the environment-fr...

Embodiment 3

[0036] On the basis of Example 2, this example provides a preferred oil well environment-friendly microbial composite paraffin remover.

[0037] The components and contents of the strain nutrient solution are: 100kg deionized water, 35kg sweet potato powder, 5kg liquid paraffin, 4kg distiller's grains, 3kg agar, 2kgNaCl, 2kgNH 4 Cl, 7kgKH 2 PO4, 2kgCaCl 2 , 2kgNa2 SO 4 .

[0038] Compound 20kg of the wax-loving mixed bacteria solution mentioned above, 60kg of the bacteria nutrient solution, 9kg of fluorocarbon surfactant FC-3B, 9kg of SP80, and 4kg of ethylene glycol monobutyl ether to obtain the oil well environment-friendly microbial compound wax-removing agent.

[0039] The oil well environment-friendly microbial compound paraffin remover was subjected to an effect evaluation test. Take 5g of solid paraffin from X oil well in Changqing Oilfield, soak it in 15mL of the compound paraffin remover, keep the water bath at a constant temperature of 45±1°C, observe and record ...

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Abstract

The invention provides an environment-friendly microbial composite paraffin remover and inhibitor for an oil well. The environment-friendly microbial composite paraffin remover and inhibitor comprises15-20 parts of a paraffin-philic mixed bacteria solution, 15-60 parts of a strain nutrient solution, 5-9 parts of a first surfactant, 5-9 parts of a second surfactant and 2-4 parts of a mutual solvent; wherein the paraffin-philic mixed bacteria solution is a mixed solution of pseudomonas aeruginosa, bacillus subtilis and micrococcus terreus fermentation liquor; the strain nutrient solution comprises the following components by weight: 20-35 parts of sweet potato powder, 1-5 parts of liquid paraffin, 1-4 parts of vinasse, 1-3 parts of agar, 1-2 parts of sodium chloride, 1-2 parts of ammonium chloride, 2-7 parts of potassium dihydrogen phosphate, 1-2 parts of calcium chloride, 1-2 parts of sodium sulfate and 90-100 parts of water; the first surfactant is a fluorocarbon surfactant FC-3B or oleamide betaine FDCH-1; the second surfactant is polyoxyethylene octylphenol ether-10 or SP80; and the mutual solvent is n-octyl alcohol or ethylene glycol monobutyl ether. The composite paraffin remover and inhibitor effectively solves the technical defects of paraffin removal and inhibition by the existing chemical method and microbiological method, and has the advantages of economy, environmental protection, high paraffin dissolving speed in thickened oil, strong anti-scouring capability, long action period and the like.

Description

technical field [0001] The invention belongs to the technical field of oilfield gathering and transportation, relates to the technical field of oilfield gathering and transportation wax-removing and anti-waxing chemicals, and in particular relates to an oil well environment-friendly microbial compound wax-removing and preventing agent. The invention solves the disadvantages of high toxicity, unsatisfactory effect and the like of the existing wax removing and preventing agent through biological and chemical methods. Background technique [0002] Crude oil contains different amounts of paraffin, and under the conditions of oil reservoirs, the paraffin in crude oil is generally in a dissolved state. When crude oil rises from the bottom of the well and flows through the oil pipe, the liquid paraffin in the crude oil will precipitate as the temperature and pressure of the pipeline drop, and will be adsorbed on the wall of the oil pipe to cause wax deposition in the oil well, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/528C09K8/54C23F11/10C23F11/12C23F11/14C23F11/173
CPCC09K8/524C09K8/528C09K8/54C23F11/10C23F11/173C23F11/12C23F11/145Y02A20/204
Inventor 王飞何琴
Owner FENGDENG PETROCHEM CO
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