CN111685116A - Compound oilfield bactericide and preparation method, use method and application thereof - Google Patents
Compound oilfield bactericide and preparation method, use method and application thereof Download PDFInfo
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- CN111685116A CN111685116A CN202010727345.2A CN202010727345A CN111685116A CN 111685116 A CN111685116 A CN 111685116A CN 202010727345 A CN202010727345 A CN 202010727345A CN 111685116 A CN111685116 A CN 111685116A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 51
- 239000003899 bactericide agent Substances 0.000 title claims abstract description 46
- 150000001875 compounds Chemical class 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 241000894006 Bacteria Species 0.000 claims abstract description 67
- RUPBZQFQVRMKDG-UHFFFAOYSA-M Didecyldimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCC[N+](C)(C)CCCCCCCCCC RUPBZQFQVRMKDG-UHFFFAOYSA-M 0.000 claims abstract description 10
- 229960004670 didecyldimethylammonium chloride Drugs 0.000 claims abstract description 10
- MGIYRDNGCNKGJU-UHFFFAOYSA-N isothiazolinone Chemical compound O=C1C=CSN1 MGIYRDNGCNKGJU-UHFFFAOYSA-N 0.000 claims abstract description 10
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims abstract description 9
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 9
- 239000010865 sewage Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000002131 composite material Substances 0.000 claims description 18
- PEVJCYPAFCUXEZ-UHFFFAOYSA-J dicopper;phosphonato phosphate Chemical group [Cu+2].[Cu+2].[O-]P([O-])(=O)OP([O-])([O-])=O PEVJCYPAFCUXEZ-UHFFFAOYSA-J 0.000 claims description 13
- 239000003381 stabilizer Substances 0.000 claims description 10
- MEPOPDXPZMVZCW-UHFFFAOYSA-M [Br-].C(CCCCCCCCCCC)CC[N+](OC1=CC=CC=C1)(C)C Chemical compound [Br-].C(CCCCCCCCCCC)CC[N+](OC1=CC=CC=C1)(C)C MEPOPDXPZMVZCW-UHFFFAOYSA-M 0.000 claims description 5
- OJIYIVCMRYCWSE-UHFFFAOYSA-M Domiphen bromide Chemical group [Br-].CCCCCCCCCCCC[N+](C)(C)CCOC1=CC=CC=C1 OJIYIVCMRYCWSE-UHFFFAOYSA-M 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 23
- 241000295146 Gallionellaceae Species 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 description 10
- 244000005700 microbiome Species 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- 230000001580 bacterial effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229960001859 domiphen bromide Drugs 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- -1 sulfur ions Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 241000862991 Leptothrix <Bacteria> Species 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 229960004887 ferric hydroxide Drugs 0.000 description 2
- 230000009036 growth inhibition Effects 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 2
- 239000002332 oil field water Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 description 1
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 244000063299 Bacillus subtilis Species 0.000 description 1
- 235000014469 Bacillus subtilis Nutrition 0.000 description 1
- 241001141454 Crenothrix Species 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000228143 Penicillium Species 0.000 description 1
- LCTONWCANYUPML-UHFFFAOYSA-M Pyruvate Chemical compound CC(=O)C([O-])=O LCTONWCANYUPML-UHFFFAOYSA-M 0.000 description 1
- 241000235527 Rhizopus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 241000605118 Thiobacillus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 229960000629 domiphen Drugs 0.000 description 1
- YXUPZGKORWTXID-UHFFFAOYSA-N domiphen Chemical compound CCCCCCCCCCCC[N+](C)(C)CCOC1=CC=CC=C1 YXUPZGKORWTXID-UHFFFAOYSA-N 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000006241 metabolic reaction Methods 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
- A01N33/02—Amines; Quaternary ammonium compounds
- A01N33/12—Quaternary ammonium compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/22—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients stabilising the active ingredients
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Toxicology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a compound oilfield bactericide as well as a preparation method, a use method and application thereof, wherein the compound oilfield bactericide comprises a first component and a second component, and is characterized in that: the first component comprises didecyl dimethyl ammonium chloride and isothiazolinone; the second component comprises dodecyl dimethyl benzyl ammonium chloride and quaternary ammonium salt; the application of the compound oilfield bactericide in killing sulfate reducing bacteria, saprophytic bacteria and iron bacteria in oilfield sewage; solves the problem that the existing bactericide can not simultaneously have good bactericidal effect on sulfate reducing bacteria, saprophytic bacteria and iron bacteria.
Description
Technical Field
The invention relates to a composite oilfield bactericide for oilfield sewage treatment, and in particular relates to a composite oilfield bactericide for oilfield sewage treatment, which is used for treating main harmful bacteria (sulfate reducing bacteria, saprophytic bacteria and iron bacteria) in an oilfield sewage system.
Background
In the process of petroleum production, a large amount of organic treating agents are required to be added besides the petroleum, and under proper conditions, the substances can be used as nutrients for bacteria, so that the bacteria grow in a large amount and harm the oil field production, and the specific harm is as follows:
1. the organic agents are degraded in large quantities. As bacteria grow in large quantity and widely exist in a water system, organic agents added in the existing production are degraded, so that the concentration of the agents is reduced, the agents are easy to decay and deteriorate, and the production operation cannot be normally carried out;
2. bacterial metabolites (such as hydrogen sulfide produced by sulfate reducing bacteria) are corrosive and can cause severe corrosion of pipelines and fracturing equipment;
3. contaminating the formation. Bacteria produced during production can enter the formation with drilling fluids, fracturing fluids, etc., causing the formation to acidify and plug.
At present, in the production process of oil fields, the most harmful bacteria mainly comprise three types of sulfate reducing bacteria, saprophytic bacteria and iron bacteria.
Sulfate Reducing Bacteria (SRB) are a generic term for a group of related Bacteria that perform Sulfate-Reducing metabolic reactions. They can be divided into dissimilatory sulfate-reducing bacteria and dissimilatory sulfur-reducing bacteria according to their different physiological and biochemical properties ("dissimilatory" means that the reduced sulfate component is not assimilated into cellular components of the bacteria, but is released as a product). The former can utilize lactate, pyruvate, ethanol and the like as carbon sources and energy sources to reduce sulfate to generate sulfide; the latter are not capable of reducing sulfates, but only elemental sulfur or other sulfur-containing compounds (e.g., sulfites, thiosulfates). General research is mostly limited to dissimilatory sulfate-reducing bacteria.
SRB is a diverse group of morphologically and nutritionally diverse microorganisms. SRB uses sulfate as an electron acceptor for dissimilatory action of organic substances, and is a gram-negative strict anaerobic bacterium. In an oil field produced water system, sulfate reducing bacteria SRB can reduce sulfate radicals into sulfur ions, and the sulfur ions can form sulfides with iron on the pipe wall to cause equipment corrosion. Because of the insolubility of the metal sulfide, the content of suspended solids in a produced water system is increased, so that the pollution of filter materials, the difficulty of oil-water separation, the reduction of the polymer injection capacity and the like are caused, and more importantly, hydrogen sulfide generated by sulfate reducing bacteria can be mixed with Fe in fracturing fluid and drilling fluid2+The reaction is carried out to generate black ferrous sulfide precipitate, which causes stratum plugging and serious harm to oil field production.
Saprophytic bacteria belong to microorganisms of the nutrient saprophytic life. They draw nutrients from dead animals, plants or other organic matter to maintain a lifestyle of their normal lives. Many bacteria and fungi belong to this class. Such as bacillus subtilis, rhizopus, penicillium, mushroom, agaric, etc. Microorganisms living in saprophytic manner belong to heterotrophic microorganisms in terms of nitrogen and carbon sources required by the microorganisms.
Saprophytic bacteria (TGB) are very commonly present in water circulation systems in the industrial fields of petroleum, chemical industry and the like, and mucus produced during propagation of the TGB is very easy to cause electrochemical corrosion due to oxygen concentration difference. In addition, slime type bacterial communities can be formed under aerobic conditions, and mass propagation increases suspended matters in water, thereby causing pipeline blockage. And can promote the growth and propagation of anaerobic microorganisms such as Sulfate Reducing Bacteria (SRB), and the like, and has multiple side effects of deteriorating water quality, increasing water body viscosity, damaging oil layers, corroding equipment and the like.
Iron bacteria are a general term for bacteria which live in ponds, lakes, hot springs and other water areas containing high-concentration ferrous ions, can oxidize ferrous salts into ferric compounds, and can utilize energy generated in the oxidation process to assimilate carbon dioxide for growth. The microorganisms belong to different groups, and some microorganisms are facultative autotrophic, such as Leptothrix (Leptothrix) and Spathogen (Crenothrix), are in the form of strings of rod-shaped cells connected into filaments, and are coated with a common sheath, and metal accumulation such as iron and the like is usually found in or on the cells. Some are strictly chemoautotrophic and can only live under strongly acidic conditions, such as Thiobacillus ferrooxidans (Thiobacillus fer-oxooxidans), which generally live in an environment with a pH of less than 4, and which play an important role in bacterial leaching. Iron bacteria produce ferric hydroxide for a long time and can accumulate into limonite, and the growth and propagation in the iron-making water pipe can shorten the service life of the water pipe. Ferrous ion compounds can be oxidized in an oil field water system to form ferric hydroxide precipitate, and the precipitate is gathered around bacteria to generate a large amount of brown slime, so that the pitting corrosion of equipment and pipelines and the formation of rusty lumps are caused, and the petroleum production is damaged.
Although oilfield bactericides are diverse in type, there is no bactericide which has a good bactericidal effect on sulfate-reducing bacteria, saprophytic bacteria and iron bacteria at the same time.
Disclosure of Invention
In view of the above, the invention provides a compound oilfield bactericide, which solves the problem that the existing bactericide cannot simultaneously have a good bactericidal effect on sulfate reducing bacteria, saprophytic bacteria and iron bacteria.
In a first aspect, the composite oilfield bactericide comprises a first component and a second component, and is characterized in that:
the first component comprises didecyl dimethyl ammonium chloride and isothiazolinone;
the second component comprises dodecyl dimethyl benzyl ammonium chloride and quaternary ammonium salt.
Further, the first component also comprises a stabilizer and water;
the stabilizer is copper pyrophosphate.
Further, the first component is prepared from 20% of didecyl dimethyl ammonium chloride, 10% of isothiazolinone, 0.5% of copper pyrophosphate and the balance of water by mass percentage.
Further, the quaternary ammonium salt is domiphen bromide (dodecyl dimethyl phenoxy ethyl ammonium bromide).
Further, the second component also comprises a stabilizer and water;
the stabilizer is copper pyrophosphate.
Further, the second component is prepared from 15% of dodecyl dimethyl benzyl ammonium chloride, 15% of quaternary ammonium salt which is domiphen bromide (dodecyl dimethyl phenoxy ethyl ammonium bromide), 0.5% of copper pyrophosphate and the balance of water by mass percentage.
Further, the mass ratio of the first component to the second component is 1: 2.
In a second aspect, a method for preparing a composite oilfield bactericide is characterized by comprising the following steps:
the composite oilfield bactericide of any one of claims 2 to 7;
and adding the solid components in the first component and the second component into the water and uniformly mixing to obtain the water-soluble emulsion.
In a third aspect, the use method of the compound oilfield bactericide comprises the following adding amount, and is characterized in that:
the addition amount is 25-50 mg/L.
In a fourth aspect, the application of the compound oilfield bactericide in killing sulfate reducing bacteria, saprophytic bacteria and iron bacteria in oilfield sewage is provided.
The invention has the following beneficial effects:
the first component of the compound oilfield bactericide is mainly didecyl dimethyl ammonium chloride and isothiazolinone, and the didecyl dimethyl ammonium chloride and the isothiazolinone have the characteristics of sterilization and bacterial growth inhibition after being mixed with each other, wherein the bacteria growth inhibition is mainly derived from the isothiazolinone, and the sterilization effect is derived from the didecyl dimethyl ammonium chloride; the second component is mainly dodecyl dimethyl benzyl ammonium chloride and quaternary ammonium salt, and the dodecyl dimethyl benzyl ammonium chloride and the quaternary ammonium salt are mixed with each other and have certain deoiling and corrosion inhibition effects besides the function of killing bacteria; the stabilizer adopts copper pyrophosphate which is a copper ion type stabilizer, can stabilize the bactericide, but does not generate corrosion to a steel structure;
tests prove that the composite oilfield bactericide can effectively kill main harmful bacteria (sulfate reducing bacteria, saprophytic bacteria and iron bacteria) in an oilfield water system, does not react with a polymer in the preparation process of the polymer, and finally reduces the harm of the bacteria to oilfield production and environment;
in addition, the compound oilfield bactericide has a low-concentration bactericidal effect, and sulfate reducing bacteria are used<106Saprophytic bacteria<106Iron bacteria<106When the bactericide is used, the concentration of the compound oilfield bactericide is 25ppm, and the bactericidal effect can be achieved.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".
Examples
The compound oilfield bactericide of the embodiment comprises the following components in percentage by weight:
the first component consists of 20 percent of didecyl dimethyl ammonium chloride, 10 percent of isothiazolinone, 0.5 percent of copper pyrophosphate and the balance of water by mass percentage;
the second component consists of 15 percent of dodecyl dimethyl benzyl ammonium chloride, 15 percent of quaternary ammonium salt which is domiphen (dodecyl dimethyl phenoxy ethyl ammonium bromide), 0.5 percent of copper pyrophosphate and the balance of water according to mass percentage. Wherein: the quaternary ammonium salt domiphen bromide is purchased from environmental protection of Huachen (Guangzhou) GmbH.
The preparation method of the compound oilfield bactericide comprises the following steps:
adding weighed didecyl dimethyl ammonium chloride, isothiazolinone and copper pyrophosphate into water and uniformly mixing;
adding weighed dodecyl dimethyl benzyl ammonium chloride, domiphen bromide (dodecyl dimethyl phenoxy ethyl ammonium bromide) and copper pyrophosphate into water and uniformly mixing;
mixing the first component and the second component according to the ratio of 1:2, and mixing the mixture evenly to prepare the compound oilfield bactericide of the embodiment.
Experimental example 1
Preparing test bacteria: purifying water from a gathering station in an oil field, and performing indoor culture and amplification until the concentration of sulfate reducing bacteria is 106Each mL, the saprophytic bacteria concentration is 106The concentration of iron bacteria is 10 per mL6Mixing the three bacteria together by using distilled water, adding 50mg/L of the composite oilfield bactericide of the embodiment into the mixture, placing the mixture into an incubator for culturing for 4 hours, and measuring the concentrations of three bacteria, namely sulfate reducing bacteria, saprophytic bacteria and iron bacteria, wherein the measurement results are as follows:
after the compound bactericide of the embodiment is added and acted for 4 hours, the number of sulfate reducing bacteria in the solution is 0/mL, which shows that the compound bactericide of the embodiment can fully kill the sulfate reducing bacteria within 4 hours when the concentration is 50 mg/L.
The number of saprophytic bacteria in the solution after the compound bactericide of the embodiment is added and acted for 4 hours is 0/mL, which shows that the compound bactericide of the embodiment can fully kill saprophytic bacteria within 4 hours when the concentration is 50 mg/L.
The number of iron bacteria in the solution after the compound bactericide is added and acted for 4 hours in the embodiment is 10/mL, which shows that when the concentration of the compound bactericide in the embodiment is 50mg/L, most of the iron bacteria can be killed within 4 hours, the concentration of the residual iron bacteria is extremely low, and the removal rate is 99.9%.
Experimental example two
And carrying out field dosing tests at a certain oil field gathering station in 11 months in 2018 to 04 months in 2019. The field treatment capacity is 1000 cubic meters per day, and the effect is as follows:
the concentrations of the composite oilfield bactericide used in the present example in the field dosing test were: 50 mg/L.
The content of sulfate reducing bacteria in the water from the polymer injection station is 102Per mL to 105Per mL, saprophytic bacteria is 102Per mL to 104Per mL, iron bacteria at 103Per mL to 105one/mL.
The dosing point is before oxygen exposure, the sampling point is three injection wells corresponding to the injection station, and the experimental period is 6 months.
Before adding chemicals, the concentration of the wellhead sulfate reducing bacteria can reach 104Each ml of the saprophytic bacteria reaches the concentration of 105Per ml, iron bacteria concentration reaches 105Per ml; after the chemicals are added, the wellhead sulfate reducing bacteria can be controlled at 50/mL, the saprophytic bacteria and iron bacteria can be controlled at 600/mL (see Table 1-Table 3 in detail), and the composite oilfield bactericide in the embodiment meets the requirements of production and industrialization.
TABLE 1 concentration change of wellhead sulfate-reducing bacteria before and after dosing
TABLE 2 concentration change of saprophytic bacteria at well head before and after dosing
TABLE 3 iron bacteria concentration change at well head before and after dosing
The above-mentioned embodiments are merely embodiments for expressing the invention, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, substitutions of equivalents, improvements and the like can be made without departing from the spirit of the invention, and these are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The composite oilfield bactericide comprises a first component and a second component, and is characterized in that:
the first component comprises didecyl dimethyl ammonium chloride and isothiazolinone;
the second component comprises dodecyl dimethyl benzyl ammonium chloride and quaternary ammonium salt.
2. The composite oilfield bactericide as claimed in claim 1, wherein:
the first component further comprises a stabilizer and water;
the stabilizer is copper pyrophosphate.
3. The composite oilfield bactericide as claimed in claim 2, wherein:
the first component is prepared from 20% of didecyl dimethyl ammonium chloride, 10% of isothiazolinone, 0.5% of copper pyrophosphate and the balance of water by mass percentage.
4. The composite oilfield bactericide as claimed in any one of claims 1 to 3, wherein:
the quaternary ammonium salt is dodecyl dimethyl phenoxyethyl ammonium bromide.
5. The composite oilfield bactericide as claimed in claim 4, wherein:
the second component also comprises a stabilizer and water;
the stabilizer is copper pyrophosphate.
6. The composite oilfield bactericide as claimed in claim 5, wherein:
the second component is prepared from 15% of dodecyl dimethyl benzyl ammonium chloride, 15% of dodecyl dimethyl phenoxy ethyl ammonium bromide, 0.5% of copper pyrophosphate and the balance of water by mass percentage.
7. The composite oilfield bactericide as claimed in claim 6, wherein:
the mass ratio of the first component to the second component is 1: 2.
8. The preparation method of the compound oilfield bactericide is characterized by comprising the following steps:
the composite oilfield bactericide of any one of claims 2 to 7;
and adding the solid components in the first component and the second component into the water and uniformly mixing to obtain the water-soluble emulsion.
9. The use method of the compound oilfield bactericide comprises the following steps of:
the addition amount is 25-50 mg/L.
10. An application of the composite bactericide for oil field in killing the sulfate-reducing bacteria, saprophytic bacteria and Fe bacteria in sewage in oil field is disclosed.
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