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Oil field sewage bactericide and preparation method thereof

A technology of oilfield sewage and fungicides, which is applied in the fields of botanical equipment and methods, biocides, disinfectants, etc., can solve the problems of high cost and difficulty in lasting drug effect, and achieve the goal of lasting drug effect, slowing down the operation intensity, and reducing costs Effect

Active Publication Date: 2014-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"Shanxi Chemical Industry" 2009, Volume 29, Issue 1 published a document "Study on the Bactericidal Effects of Different Types of Bactericides on SRB in Oilfield Sewage", which respectively tested several kinds of fungicides such as non-oxidizing, oxidizing, and nitrite The test evaluation was carried out, and it was pointed out that the non-oxidizing fungicide has the best effect, and its bactericidal rate can reach 96.37% on average, but there are still problems of unsustainable drug effect and high cost

Method used

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  • Oil field sewage bactericide and preparation method thereof
  • Oil field sewage bactericide and preparation method thereof
  • Oil field sewage bactericide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Add 10g of nano titanium dioxide powder and 57mL of distilled water into a 250mL reaction vessel, add 1mL of ethylene glycol with a mass fraction of 99%, heat to 70°C, stir for 1.5 hours, and then add 12mL of 50% dodecyl Alkyl dimethyl benzyl ammonium chloride and 20 mL of sodium hypochlorite solution with a mass fraction of 30% are stirred evenly to obtain a fungicide for oilfield sewage. For performance evaluation results, see figure 1 .

Embodiment 2

[0023] Example 2: Add 15g of nano-titanium dioxide powder and 45mL of distilled water into a 250mL reaction vessel, add 3mL of epichlorohydrin with a mass fraction of 30%, heat to 60°C, stir for 1 hour, and then add 20mL of dec Dialkyl dimethyl benzyl ammonium chloride and 17 mL of potassium hypochlorite solution with a mass fraction of 30% were stirred evenly to obtain a fungicide for oilfield sewage. For performance evaluation results, see figure 2 .

Embodiment 3

[0024] Example 3: Add 25g of nano titanium dioxide powder and 35mL of distilled water into a 250mL reaction vessel, add 5mL of 4-mercaptobenzoic acid with a mass fraction of 30%, heat to 80°C, stir for 1 hour, and then add 10mL of 4-mercaptobenzoic acid with a mass fraction of 50%. Octadecyl dimethyl benzyl ammonium chloride and 25mL sodium hypochlorite solution with a mass fraction of 30% were stirred evenly to obtain the oilfield sewage fungicide. For performance evaluation results, see image 3 .

[0025] The test method is unchanged, and the content of each component is changed. At a temperature of 70 ° C, Examples 4-10 are obtained under the condition of stirring for 1 hour. The results are as follows:

[0026] Table 1 Composition and content of oilfield sewage fungicides in Examples 4-10

[0027]

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Abstract

The invention discloses an oil field sewage bactericide and a preparation method thereof, belonging to the technical field of chemical agents for oil fields and preparation thereof. The oil field sewage bactericide is prepared by mixing the following components in percentage by mass: 10-15% of nano titanium dioxide powder, 0.5-2% of crosslinking agent, 5-10% of surfactant, 5-10% of oxidizer and the balance of water. The bactericide can be deposited on pipe walls, bent angles and other parts along with a liquid flow; a main agent can be slowly diluted out, has persistent chemical action and causes no corrosion to pipelines; the comprehensive sterilizing rate of the bactericide with respect to sulfate reducing bacteria, saprophytic bacteria and iron bacteria can be still up to 90% or above 18 days after filling; and the filling period of the chemical agent is 15-25 days which is 10-15 times longer in comparison with a common chemical agent, thereby greatly relieving the operation intensity and lowering the cost.

Description

technical field [0001] The invention relates to an oilfield sewage bactericide and a preparation method thereof, belonging to the technical field of oilfield chemical agents and preparation. Background technique [0002] During sewage reinjection in major oil fields, water injection equipment, pipelines, and wellbores of water injection wells are prone to water pollution, blockage, and corrosion due to bacterial growth. Generally, fungicides are added to solve the harm caused by bacteria. At present, most of the fungicides injected are For liquid, when the intermittent dosing method is used for filling, due to the influence of water flow, it is difficult for the medicine to last for a long time. When the continuous dosing method is used for filling, the cost is too large and time-consuming and laborious. Patent 201010202497.7 discloses a fungicide for oilfield reinjection water, which is composed of the following raw materials in weight ratio: 1-3 parts of butanediamine, 3-5...

Claims

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Application Information

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IPC IPC(8): A01N59/00A01N25/08A01P1/00A01N33/12
Inventor 陈洪杰吴信荣林伟民黄雪松关建庆瞿江英罗沿予赵国瑜
Owner CHINA PETROLEUM & CHEM CORP
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