Gas field reinjection water bactericide and composition thereof

A technology for reinjecting water and fungicides, applied in biocides, preparation of amino compounds, preparation of organic compounds, etc., can solve problems such as difficult anticipation requirements of sterilization treatment, achieve long duration of drug effect, less foam, and strong reduction of surface tension Effect

Inactive Publication Date: 2013-06-26
SICHUAN RENZHI PETROCHEMICAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to predict the requirements for sterilization treatment with conventional oilfield reinjection water fungicides, and it is necessary to specially develop fungicide formulations suitable for gas field reinjection water quality

Method used

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  • Gas field reinjection water bactericide and composition thereof
  • Gas field reinjection water bactericide and composition thereof
  • Gas field reinjection water bactericide and composition thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Accurately weigh 1.16g (0.010mol) of tetramethylethylenediamine into a jacketed Erlenmeyer flask equipped with reflux, add 4.25g (0.022mol) of n-bromooctane at room temperature, add 15ml of isopropanol, and shake Shake well, and react with magnetic stirring at 80°C for 24-48 hours. The product after the reaction was distilled off under reduced pressure to remove the solvent to obtain a light yellow viscous substance. The crude product was recrystallized three times in a mixed solvent of acetone and absolute ethanol to remove impurities, and dried in vacuum to obtain a white powder, which was a double quaternary ammonium salt type gas field reinjection water fungicide (8-2-8).

Embodiment 2

[0036] Weigh 15.8g of organic guanidine, 5.6g of diquaternary ammonium salt, 23.5g (0.022mol) of glutaraldehyde, and 55.1g of water, and make an aqueous solution of organic guanidine, then slowly add the diquaternary ammonium obtained in Example 1 under stirring Salt-type gas field reinjection water fungicide (8-2-8), until it is completely dissolved, then add glutaraldehyde liquid, and mix well.

Embodiment 3

[0038] The bactericidal composition described in Example 2 was added to the reinjection water of the gas field, and the water sample was inoculated at 37°C for 4 hours, and then the bactericidal performance was tested by the extinction dilution method described in the standard (SY / T 0532-93). The bactericidal effect at the dosing concentration is compared with that of a single fungicide in Table 1.

[0039] The extinct dilution method described in the standard (SY / T 0532 - 93) is applicable to the analysis of saprophytic bacteria, sulfate reducing bacteria and iron bacteria in oilfield injection water, and the analysis of bacteria in other water in oilfields can be referred to. Determination of saprophytic bacteria, sulfate reducing bacteria and iron bacteria were all carried out by exsolution method. The water sample to be measured is injected into the test bottle or test tube step by step for inoculation and dilution until the last test bottle or test tube grows sterile, and...

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PUM

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Abstract

The invention discloses a double quaternary ammonium salt type gas field reinjection water bactericide and a bactericide composition comprising the bactericide. Compared with a traditional bactericide 1227, the double quaternary ammonium salt provided by the invention has higher positive charge density, and the capacity of absorbing negatively charged bacterial cell surfaces is improved. Therefore, the bactericide provided by the invention has relatively high antibacterial activity. Also, the bactericide has the advantages of long effect duration and low foam. The double-long-chain quaternary ammonium salt has one hydrophilic group and two hydrophobic groups, such that higher capacity for reducing surface tension is provided, and water solubility can be improved. Under a condition of relatively high water hardness, good solubility and stability are shown. With the gas field reinjection water bactericide composition, a bacteria test is carried out according to an extinction dilution method represented by SY/T0532-93, and bactericidal experiments are carried out aiming at sulfate-reducing bacteria (SRB), iron bacteria (FB) and saprophytes (TGB). As a result, an effective bactericidal concentration is 20-30ppm, and a bactericidal rate reaches 99.9% and higher, such that reinjection requirements are satisfied.

Description

technical field [0001] The invention relates to a gas field reinjection water bactericide and a composition thereof, specifically belonging to the field of gas field reinjection water treatment. Background technique [0002] Gas field wastewater comes from the process of natural gas exploitation and is discharged out of the well along with natural gas. Since the salinity (mainly sodium chloride) of gas field production water is as high as 20,000-100,000mg / L, direct discharge will cause environmental pollution and soil salinization, so re-injection into the formation after treatment is the main way out. [0003] The key issue of reinjection is to treat the produced water to meet the water quality requirements of reinjection water (SY / T5329-94). The bacteria content in gas field reinjection water is generally high, especially sulfate reducing bacteria (SRB), iron bacteria (TGB) and saprophytic bacteria (FB) exceed the standard seriously, and most of the bacteria content in re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N33/12A01N47/44A01P1/00C07C211/63C07C209/12C02F1/50
Inventor 姚兵操卫平王德龙张博联
Owner SICHUAN RENZHI PETROCHEMICAL TECHNOLOGY CO LTD
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