Corrosion and scale inhibition bactericide and application thereof

A technology of corrosion and scale inhibition and bactericide, applied in the application, biocide, disinfectant and other directions, can solve the problems of many corrosion and scale inhibition and bactericidal components, complicated preparation process and high cost, and achieve excellent corrosion inhibition and scale removal. performance, enhanced oil recovery, and the effect of increasing enterprise benefits

Active Publication Date: 2020-05-12
克拉玛依翎昊科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the object of the present invention is to provide a corrosion and scale inhibition bactericide, so as to solve the problems in the prior art that the complex corrosion and scale inhibition and sterilization components are many, the preparation process is complicated, and the cost is high; A general inventive concept, the present invention also provides the preparation method and application of the above corrosion and scale inhibition bactericide

Method used

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  • Corrosion and scale inhibition bactericide and application thereof
  • Corrosion and scale inhibition bactericide and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The non-oxidizing fungicides commonly used in oil and gas fields mainly include dichlorophen, glutaraldehyde, isothiazolinone, dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, Hexaalkyldimethyl(2-sulfite)ethylammonium, etc. In order to compare the bactericidal effects of different bactericides and their corrosion effects on pipelines, the inventors first conducted comparative tests on different bactericides. Carry out 3 times in parallel, and take the average value of the test results;

[0022] Table 1 Comparison of bactericidal effects of different fungicides and corrosion rate of A3 carbon steel

[0023] .

[0024] From the perspective of bactericidal performance, under the condition that the dosage concentration is 30mg / L, hexadecyldimethyl (2-sulfite) ethylammonium, dodecylguanidine sulfate and dodecyldimethyl The bactericidal effect of betaine on sulfate-reducing bacteria, iron bacteria and saprophytic bacteria was relativel...

Embodiment 2

[0030] In order to further improve the corrosion inhibition performance of the bactericidal preparation combination, the inventor combined the preparation with the best bactericidal performance in Example 1 with dodecyl dimethyl betaine and hexadecyl dimethyl (2-sulfurous acid) ethyl Ammonium is combined with different corrosion and scale inhibition agents; the weight ratio of the components used is lauryl dimethyl betaine: hexadecyl dimethyl (2-sulfurous acid) ethyl: corrosion and scale inhibition Agent = 2:2:1; under the condition of adding an effective concentration of 40mg / L, the corrosion rate of different agent combinations on A3 carbon steel is shown in Table 3;

[0031] Table 3 Comparison of corrosion rate and corrosion inhibition rate of A3 carbon steel with different formulation combinations

[0032]

[0033] * Definition of corrosion inhibition rate: the difference between the corrosion rate of A3 steel sheet without corrosion inhibitor and the corrosion rate of ...

Embodiment 3

[0036] The above results show that the combination of lauryl dimethyl betaine, hexadecyl dimethyl (2-sulfite) ethyl ammonium and sodium lignosulfonate or alkaline lignin has a combination of antibacterial properties Superior, and can effectively reduce the corrosion rate of A3 carbon steel. Lauryl dimethyl betaine belongs to betaine type amphoteric surfactants, and some components of the betaine type amphoteric surfactant family are also commonly used as fungicides, such as decanyl dimethyl hydroxypropyl base sultaine, dodecyl ethoxy sultaine, etc., and then the inventors used decanyl dimethyl hydroxypropyl sultaine and hexadecyl dimethyl (2-sulfurous acid ) ethyl ammonium and sodium lignin sulfonate, and the antibacterial and corrosion inhibition performance of different formulation combinations was investigated.

[0037] First, prepare 1 L of corrosion and scale inhibitor with a concentration of 50%. The specific preparation process is as follows:

[0038] (1) Add 500g of ...

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Abstract

The invention belongs to the technical field of oil and gas field development, and particularly relates to a corrosion and scale inhibition bactericide and application thereof. Effective components ofthe corrosion and scale inhibition bactericide consist of a betaine ampholytic surfactant, hexadecyl dimethyl (2-sulphurous acid) ethylammonium and a lignin derivative, wherein the weight ratio of the betaine ampholytic surfactant to the hexadecyl dimethyl (2-sulphurous acid) ethylammonium to the lignin derivative is (2-10): (1-5): (1-50). Based on a total inventive concept, the invention furtherprovides a preparation method and application of the corrosion and scale inhibition bactericide. The corrosion and scale inhibitor can effectively kill reducing bacteria, iron bacteria and saprophytic bacteria in oilfield reinjection water, and has excellent corrosion and scale inhibition performance. When the preparation combination is added into a reinjection water system, the water quality requirement of oilfield reinjection water can be met, and the crude oil water drive recovery ratio can be increased, and the corrosion and scale inhibition bactericide is economical and efficient.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a corrosion-inhibiting, scale-inhibiting and fungicide and its application. Background technique [0002] In the water injection development stage of oil and gas fields, the pH of reinjection water and the high concentration of Ca in it 2+ , Mg 2+ 、HCO 3 - , SO 4 2- , Cl - and S 2- Plasma can cause corrosion or blockage of piping equipment in water injection systems. In addition, microorganisms in the reinjection water, such as sulfate reducing bacteria, iron bacteria and saprophytic bacteria, will also produce sediment or bacterial film (slime) attached to the inner wall of the pipeline and equipment during the growth and reproduction process, causing damage to the pipeline and equipment of the water injection system. Corrosion or clogging. Blockage of water injection pipelines or equipment will not only increase water injection pressur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14A01N33/12A01P1/00C02F103/10
CPCC02F5/14A01N33/12C02F2303/08C02F2303/22C02F2303/04C02F2103/10
Inventor 陈昊云马雅雅邓靖译刘斌何焕杰杜洪波刘冬陈东训张高山
Owner 克拉玛依翎昊科技有限责任公司
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