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Oil recovery reinjection water bactericide and application thereof

A technology of reinjecting water and fungicides, which is applied in the fields of application, biocide, sterilization/microdynamic water/sewage treatment, etc. It can solve the problems of increasing oily sewage water volume, high organic matter content, and rising water content in crude oil, etc. , to achieve the effects of inhibiting the growth of fungi, slowing down hydrolysis, and low dosage

Active Publication Date: 2014-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the water injection in the oil field, two problems have been brought about: one is the water source for water injection, and people hope to provide a large and stable water source; Emissions and disposal are big issues
However, in most domestic onshore oilfields, the oil production and water injection system is mainly carried out under closed conditions, and the content of organic matter in the injection water is high, which usually requires a large amount of oxidant to achieve the purpose of sterilization, and after long-term field experimental research, or due to poor sterilization effect Or it will increase corrosion, so it cannot be promoted and used in the field
[0010] Commonly used monomer agents for fungicides also include: heterocyclic compounds (imidazole derivatives, thiazole, imidazoline and triazine derivatives, isothiazolinone, polyquaternary thiazine, polypyridine, polyquinoline, chlorhexidine too, alkyl biguanide salts, etc.), aldehyde compounds (formaldehyde, isobutyraldehyde, acrolein, cinnamaldehyde, benzaldehyde, glyoxal, glutaraldehyde, etc.) and cyanide-containing compounds, etc., but these substances often have adsorption Defects such as strong loss, high dosage concentration or poor solubility

Method used

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  • Oil recovery reinjection water bactericide and application thereof
  • Oil recovery reinjection water bactericide and application thereof
  • Oil recovery reinjection water bactericide and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Mix 200 parts of dibromoazepam and 1 part of dichlorohydantoin (also known as dichlorodimethylhydantoin) prepared by conventional methods, add solvent polyethylene glycol, and then add stabilizer 10% sodium carbonate The aqueous solution is mixed uniformly to obtain a fungicide.

Embodiment 2

[0056] 20 parts of dibromodiaphrine prepared by conventional methods are dissolved in water to prepare a solution with no less than 20% active ingredients, after adding stabilizer 10% sodium carbonate aqueous solution, then add 1 part of dibromohydantoin (also known as dibromodimethylhydantoin), and then add a stabilizer such as 0.1 part of polymethanol or acetonitrile or halogenated acetate to obtain a fungicide.

Embodiment ）

[0058] Prepare dibromoazidepropionamide by conventional method and add 10% sodium carbonate aqueous solution, mix with bromochlorohydantoin (also known as bromochlorodimethylhydantoin), add solvent polyethylene glycol, and then add stabilizer polyoxymethylene Mix evenly, obtain bactericide, carry out bactericidal performance evaluation test, the proportioning ratio (percentage by weight) of dibromide, bromochlorhydantoin and stabilizer is as shown in table 3, the proportioning of solvent polyethylene glycol can be Obtained from Table 3, not shown in the table. The bactericidal effect is shown in Table 4. In Table 4, sulfate-reducing bacteria are taken as an example to illustrate the bactericidal effect of the present invention, but the bactericide of the present invention is a broad-spectrum antibacterial agent, and those skilled in the art will know that the bactericide can also be applied to other harmful bacteria. Its bactericidal performance evaluation method adopts the M...

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Abstract

The invention discloses an oil recovery reinjection water bactericide and an application thereof. The bactericide comprises dibromo nitrilotriacetic propionamide and halogenated hydantoin with a weight ratio of 200:1-20:1. The bactericide can be used in polymer flooding reinjection water. According to the bactericide provided by the invention, with a synergetic effect between monomers, hydrolysis stability is improved, such that potency is increased and is maintained stable. Therefore, oil recovery pipeline and stratum corrosion, fouling and blocking caused by bacteria and algae can be greatly relieved. Because of the compatibility of bactericide components and oil recovery additives, polymer flooding reinjection water viscosity can be substantially improved, such that polymer dose during polymer flooding can be greatly reduced, and oil recovery production stability and efficiency improvement can be facilitated on a basis of water saving and emission reduction.

Description

technical field [0001] The present invention relates to a fungicide and its application, more specifically to a fungicide for oil production reinjection water and its application. Background technique [0002] At present, most of my country's oil fields adopt the water flooding development method, so the relationship between water and oil production is extremely great. With the water injection in the oil field, two problems have been brought about: one is the water source for water injection, and people hope to provide a large and stable water source; Emissions and disposal are big issues. Therefore, the reinjection of oilfield wastewater is a correct way to rationally develop and utilize water resources. [0003] However, the water quality of oil field wastewater is complex and contains many harmful components. Therefore, there are certain requirements on the water quality of oilfield injection water, otherwise a series of new problems will be brought to the whole oil pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/50A01N37/34A01P1/00C02F1/50C09K8/58
Inventor 邢琳平春霞曹宗仑邢毅张英雄
Owner CHINA PETROLEUM & CHEM CORP