CN111137991A - Corrosion and scale inhibition bactericide and application thereof - Google Patents
Corrosion and scale inhibition bactericide and application thereof Download PDFInfo
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- CN111137991A CN111137991A CN202010207552.5A CN202010207552A CN111137991A CN 111137991 A CN111137991 A CN 111137991A CN 202010207552 A CN202010207552 A CN 202010207552A CN 111137991 A CN111137991 A CN 111137991A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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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. The effective components of the corrosion and scale inhibition bactericide consist of a betaine amphoteric surfactant, hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium and a lignin derivative; the weight ratio of the betaine amphoteric surfactant to the hexadecyldimethyl (2-sulfurous acid) ethyl ammonium to the lignin derivative is (2-10) to (1-5) to (1-50). Based on a general inventive concept, the invention also provides a preparation method and application of the corrosion and scale inhibition bactericide. The invention can effectively kill reducing bacteria, iron bacteria and saprophytic bacteria in the reinjection water of the oil field, and has excellent corrosion inhibition and descaling performances. The addition of the preparation combination in a reinjection water system can not only meet the water quality requirement of reinjection water of an oil field, but also improve the water-drive recovery ratio of crude oil, and is an economic and efficient corrosion-inhibition descaling bactericide.
Description
Technical Field
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.
Background
In the water injection development stage of oil and gas field, the pH value of the reinjection water and high-concentration Ca in the reinjection water2+、Mg2+、HCO3 -、SO4 2-、Cl-And S2-The plasma can cause corrosion or plugging of water injection system plumbing equipment. In addition, microorganisms in the reinjection water, such as sulfate reducing bacteria, iron bacteria, saprophytic bacteria and the like, can also generate precipitates or bacterial films (slime) are attached to the inner walls of pipelines and equipment in the growth and propagation processes, so that the pipelines and the equipment of the water injection system are corroded or plugged. The blockage of the water injection pipeline or equipment can increase the water injection pressure, damage the pipeline and equipment of a water injection system, cause huge economic loss for the normal production operation of an oil field, and influence the formation pores to influence the crude oil exploitation. Therefore, in the stage of oilfield flooding development, corrosion inhibitors, scale inhibitors and bactericides are required to be added into the reinjection water at the same time to ensure the smoothness of pipeline equipment.
The biocides commonly used in water treatment in the prior art fall into two categories: one is an oxidation type bactericide which has strong oxidizability, high and thorough sterilization speed, low cost, small relative influence on environmental pollution and difficult generation of drug resistance by microorganisms; however, the oxidation-type bactericide has the disadvantages of short pesticide effect time, great influence by organic matters and reducing substances in water, great influence by water pH, poor dispersion and permeation capability and clay stripping capability, and strong corrosion to pipelines and equipment. Common oxidizing biocides include chlorine, sodium hypochlorite, chlorine dioxide, ozone, hydrogen peroxide, and the like. The other type of non-oxidizing bactericide has a certain lasting biocidal effect, has the effects of penetrating and stripping sediments or slime, is slightly influenced by reducing substances such as hydrogen sulfide, ammonia and the like in water and the pH of water, and is a bactericide commonly used in oil and gas fields. The non-oxidation bactericides are various in types, and the oil and gas fields are commonly used with diclofenac, glutaraldehyde, isothiazolinone, dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide and the like, but the bactericides are single in function and only have a sterilization function, so that the problems of possible corrosion and blockage of pipelines and equipment of a water injection system cannot be solved.
CN109694702A discloses a corrosion-inhibiting bactericide for oil fields and a preparation method thereof. The corrosion inhibition bactericide for the oilfield comprises the following components: 8-13 parts of oleic hydroxyethyl imidazoline, 17-22 parts of dodecyl dimethyl benzyl ammonium chloride, 1-5 parts of hydroxyethylidene diphosphonic acid (HEDP), 1-5 parts of amino trimethylene phosphonic Acid (ATMP), 1-3 parts of ethylene glycol, 20-31 parts of polymeric organic guanidine and the balance of water. The corrosion inhibition bactericide for the oil field has the functions of slowing down the corrosion of an acquisition system and a transportation system of the oil field and inhibiting the breeding of bacteria. When the dosage of the corrosion inhibition bactericide reaches 50mg/L, the corrosion inhibition rate is over 75 percent, the corrosion rate can be controlled below 0.076mm/a, and the sterilization rate is over 99 percent. The corrosion-inhibiting bactericide has the advantages of multiple functions, more components, complex preparation process steps, heating in the preparation process, and high equipment and production cost.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a corrosion-inhibition scale-inhibition bactericide, so as to solve the problems of multiple complex corrosion-inhibition scale-inhibition bactericidal components, complex preparation process and higher cost in the prior art; based on a general inventive concept, the invention also provides a preparation method and application of the corrosion and scale inhibition bactericide.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the effective components of the corrosion and scale inhibition bactericide comprise a betaine amphoteric surfactant, hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium and a lignin derivative;
the weight ratio of the betaine amphoteric surfactant to the hexadecyldimethyl (2-sulfurous acid) ethyl ammonium to the lignin derivative is (2-10) to (1-5) to (1-50).
Preferably, the betaine type amphoteric surfactant is any one of decyl dimethyl hydroxypropyl sulfobetaine, dodecyl dimethyl betaine, dodecyl ethoxy sulfobetaine, dodecyl dimethyl hydroxypropyl sulfobetaine, tetradecylamidopropyl hydroxypropyl sulfobetaine, cocamidopropyl betaine, and laurylamidopropyl betaine. The betaine amphoteric surfactant has strong bactericidal property, good killing effect on iron bacteria, sulfate reducing bacteria, saprophytic bacteria and the like, acid resistance, alkali resistance, good compatibility with anionic, cationic and nonionic bactericides, synergistic effect, no pollution to the environment and easy biodegradation.
Preferably, the lignin derivative is any one of sodium lignin sulfonate or alkalized lignin. The lignin derivative has wettability, dispersibility and chelation, and has excellent oil displacement and scale prevention functions.
The preparation method of the corrosion and scale inhibition bactericide specifically comprises the following steps: adding a prepared amount of lignin derivatives into a certain amount of water to fully dissolve; under the condition of stirring, adding the betaine amphoteric surfactant according to the weight ratio to dissolve and uniformly mix; adding hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium under stirring, and uniformly mixing to obtain the product.
Based on a general inventive concept, the invention also comprises the application of the corrosion and scale inhibition bactericide in the development process of oil and gas fields.
The invention also provides a method for inhibiting and sterilizing scale and water reinjection of the oil and gas field by using the corrosion and scale inhibition bactericide, namely, the effective concentration of the corrosion and scale inhibition bactericide is 30-500 mg/L; further preferably, the effective concentration of the corrosion and scale inhibition bactericide is 30-50 mg/L.
In addition, the invention also provides a method for improving the crude oil recovery rate of the oil and gas field by using the corrosion and scale inhibition bactericide, namely, the effective concentration of the corrosion and scale inhibition bactericide is 150-500 mg/L in reinjection water of the oil and gas field.
Compared with the prior art, the invention has the following beneficial effects:
the preparation combination consisting of the hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium, the betaine type surfactant and the lignin derivative can effectively kill reducing bacteria, iron bacteria and saprophytic bacteria in oil field reinjection water, and has excellent corrosion inhibition and descaling performances. The addition of the preparation combination in a reinjection water system can not only meet the water quality requirement of reinjection water of an oil field, but also improve the water-drive recovery ratio of crude oil and increase the enterprise benefit, and is an economic and efficient corrosion-inhibition descaling bactericide.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The reagents and materials used in the present invention are either commonly available or available through published routes to those skilled in the art.
In the performance evaluation of the corrosion and scale inhibition bactericide, reference is made to 'recommendation indexes and analysis methods for water injection quality of clastic rock oil deposit' (SY/T5329-2012), 'bactericide for oil field' (Q/SY 49-2007), 'performance indexes and evaluation methods for corrosion inhibitors for water treatment of oil field extraction' (SY/T5273-2014), 'technical requirements for corrosion and scale inhibitors for water treatment of oil field' (Q/SY 126-2007), 'analysis methods for water in oil field' (SY/T5523-2016) and 'performance determination methods for petroleum sulfonate for oil displacement' (SY/T5908-94).
Example 1
The non-oxidation bactericide commonly used in oil and gas fields mainly comprises dichlorophen, glutaraldehyde, isothiazolinone, dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium and the like. In order to compare the sterilization effects of different bactericides and the corrosion effects of the different bactericides on pipelines, the inventor firstly carries out comparison tests on different bactericides, and specific test results are shown in table 1, wherein the tests are carried out in parallel for 3 times by taking no bactericide as a blank control, and the test results are averaged;
TABLE 1 comparison of the fungicidal effectiveness of the different fungicides and the corrosion rate on A3 carbon steel
From the aspect of sterilization performance, the cetyl dimethyl (2-sulfurous acid) ethyl ammonium, the dodecyl guanidine sulfate and the dodecyl dimethyl betaine have relatively good sterilization effects on sulfate reducing bacteria, iron bacteria and saprophytic bacteria under the condition that the adding concentration is 30 mg/L. From the corrosion inhibition performance, the corrosion rates of the didecyl dimethyl ammonium chloride, the hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium and the dodecyl dimethyl betaine to the A3 carbon steel are relatively low, which shows that the three bactericides have certain corrosion inhibition performance, but the corrosion rates of the three bactericides are still higher than the technical requirements of corrosion inhibitor performance indexes and evaluation methods for oilfield produced water treatment (SY/T5273-2014).
In order to further increase the corrosion inhibition performance of the bactericide, the inventor selects the preparation with superior sterilization and corrosion inhibition performance to combine, and examines the sterilization and corrosion inhibition performance of the preparation combination, and the specific test results are shown in table 2;
TABLE 2 comparison of the germicidal efficacy of different formulation combinations and corrosion rates to A3 carbon steel
The weight ratio of dodecyl dimethyl betaine to hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium, dodecyl guanidine sulfate and didecyl dimethyl ammonium chloride is 1: 1; as can be seen from Table 2, the bactericidal effect of the preparation combination consisting of the dodecyl dimethyl betaine and the hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium on sulfate reducing bacteria, iron bacteria and saprophytic bacteria is greatly improved, the number of bacteria can meet the requirement of an oil field on the quality of reinjection water, but the corrosion rate of the preparation combination on A3 carbon steel is still higher than 0.076mm/a specified in corrosion inhibitor performance index and evaluation method for oilfield produced water treatment (SY/T5273-2014).
Example 2
In order to further improve the corrosion inhibition performance of the bactericidal preparation combination, the inventor combines the preparation combination with the optimal bactericidal performance in example 1, namely dodecyl dimethyl betaine and hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium, with different corrosion and scale inhibition preparations; the weight ratio of the used components is dodecyl dimethyl betaine: hexadecyldimethyl (2-sulfurous acid) ethyl: corrosion and scale inhibitor = 2: 1; under the condition of adding the effective concentration of 40mg/L, the corrosion rate of different preparation combinations to A3 carbon steel is shown in Table 3;
TABLE 3 comparison of corrosion rate and corrosion inhibition for different formulation combinations on A3 carbon steel
Inhibition efficiency definition: the difference value of the corrosion rate of the steel sheet without the corrosion inhibitor A3 and the corrosion rate of the steel sheet A3 after the corrosion inhibitor is added is divided by the ratio of the corrosion rate of the steel sheet without the corrosion inhibitor A3 and then multiplied by 100 percent, and the obtained numerical value is the corrosion inhibition rate.
From the above table, after adding the corrosion and scale inhibitor PAPE, octadecylamine, imidazoline thiophosphate, sodium lignosulfonate and alkalized lignin, the corrosion rates of the preparation combination to A3 carbon steel are all less than 0.076mm/a, and the requirements are met; the corrosion rate of the preparation combination added with the alkali lignin on A3 carbon steel is the lowest and is 0.031mm/a, and the corrosion rate of the preparation combination added with the sodium lignosulfonate is slightly higher than that of the former and is 0.033 mm/a.
Example 3
The results show that the preparation combination prepared by using the dodecyl dimethyl betaine and the hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium to be matched with the sodium lignin sulfonate or the alkaline lignin has excellent antibacterial performance and can effectively reduce the corrosion rate of the A3 carbon steel. Dodecyl dimethyl betaine belongs to betaine type amphoteric surfactants, and other components of the betaine type amphoteric surfactants are also commonly used as bactericides, such as decyl dimethyl hydroxypropyl sulfobetaine, dodecyl ethoxy sulfobetaine and the like, so that the inventor uses the decyl dimethyl hydroxypropyl sulfobetaine to compound hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium and sodium lignosulfonate to investigate the sterilization and corrosion inhibition performance of different preparation combinations.
Firstly, 1L of corrosion and scale inhibition bactericide with the concentration of 50% is prepared, and the preparation process comprises the following steps:
(1) adding 500g of water into a container, adding 62.5g of sodium lignosulfonate, and stirring until the sodium lignosulfonate is completely dissolved to obtain a mixed solution;
(2) under the condition of stirring, adding 125g of decyl dimethyl hydroxypropyl sulfobetaine into the mixed solution in the step (1), and completely dissolving to obtain mixed solution;
(3) under the condition of stirring, 312.5g of hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium is added into the mixed solution in the step (2), and the mixture is continuously stirred until the mixture is uniform;
decyl dimethyl hydroxypropyl sulfobetaine as described above: hexadecyldimethyl (2-sulfurous acid) ethylammonium: the weight ratio of the sodium lignin sulfonate is 2: 5: 1. When in use, the preparation combination is added into reinjection water according to the effective concentration of 40 mg/L; the above combined preparation can also be prepared into other concentrations, and is added according to the effective concentration when in use; or sequentially dissolving and adding according to effective concentration before use. Measuring various parameter values of the reinjection water after 7 days, wherein the specific data are shown in a table 4;
TABLE 4 Bactericidal efficacy and corrosion rate on A3 carbon steel after addition of the above formulation combinations
As can be seen from the above table, after 7 days of the reinjection water circulation, SRB and IB can hardly be detected, and TGB is only 0.5/mL, so that the bactericidal performance is extremely excellent; and the corrosion rate of the reinjection water after the preparation is added and combined is reduced from 0.124mm/a to 0.021mm/a, and the corrosion inhibition effect is excellent. After the preparation combination is added, the scale inhibition rate of the calcium carbonate in the reinjection water can reach 85 percent, which shows that the preparation combination has good sterilization performance and corrosion and scale inhibition performance.
In addition, the inventor finds that after the preparation combination is added into reinjection water, the recovery ratio of crude oil is improved by 0.26% compared with the condition without adding the preparation combination, and the preparation combination can improve the water flooding recovery ratio of an oil field to a certain extent.
Example 4
In order to further examine the effect of the compound preparation of hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium, different betaine type surfactants and different lignin derivatives, the inventor combines and adds the sterilization and corrosion inhibition preparation with different weight proportions into the reinjection water of a certain water injection station, wherein the weight proportions of different components are shown in table 5;
TABLE 5 weight ratios of the different ingredients in the formulation combinations
In the above table, a1 is decyl dimethyl hydroxypropyl sulfobetaine, a2 is dodecyl dimethyl betaine, A3 is dodecyl ethoxy sulfobetaine, a4 is dodecyl dimethyl hydroxypropyl sulfobetaine, a5 is tetradecylamidopropyl hydroxypropyl sulfobetaine, a6 is cocamidopropyl betaine, a7 is laurylamidopropyl betaine; b is hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium; c1 is sodium lignosulfonate, and C2 is alkaline lignin.
The scale inhibition rate (calcium carbonate) of the preparation combination under different effective concentration conditions and the influence result on the recovery ratio are shown in table 6; the results of the bactericidal effect and corrosion rate measurements for the different formulation combinations are shown in table 7;
TABLE 6 comparison of Scale inhibition (calcium carbonate) and Effect on recovery for different formulation combinations
TABLE 7 comparison of the number of bacteria in the reinjection water before and after the addition under different conditions and the corrosion rate
As can be seen from Table 6, under the conditions of different weight proportions and different effective concentrations, the descaling rate of the calcium carbonate of the preparation combination can reach more than 85 percent, and the descaling rate of the calcium carbonate can be improved to a certain extent by increasing the adding amount of the preparation combination. From the aspect of recovery efficiency, the recovery efficiency after the preparation combination is added is improved compared with the recovery efficiency of the original water drive; however, the improvement degree of the recovery efficiency is lower when the effective concentration is 30-50 mg/L, and the recovery efficiency is only improved by 0.18% -0.36% compared with the recovery efficiency of the raw water flooding; when the effective concentration is 150-500 mg/L, the recovery ratio can be improved by 2.03-3.68% after the addition compared with the recovery ratio of the raw water flooding; the full explanation shows that the addition of the preparation combination in the reinjection water can effectively prevent the precipitation of calcium carbonate and improve the recovery ratio of crude oil, thereby improving the production benefit.
As can be seen from Table 7, the sterilization rate of the preparation combination on reducing bacteria, iron bacteria and saprophytic bacteria reaches more than 99%, and the corrosion rate is far less than the oil and gas industry standard value of 0.076 mm/a.
In conclusion, the preparation combination consisting of the hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium, the betaine type surfactant and the lignin derivative can effectively kill reducing bacteria, iron bacteria and saprophytic bacteria in oil field reinjection water, and has excellent corrosion inhibition and descaling performances. The addition of the preparation combination in the reinjection water can not only meet the water quality requirement of the reinjection water of an oil field, but also improve the water-drive recovery ratio of crude oil and increase the enterprise benefits, and is an economic and efficient multifunctional corrosion-inhibiting descaling bactericide.
Claims (7)
1. The corrosion and scale inhibition bactericide is characterized in that the effective components of the corrosion and scale inhibition bactericide comprise a betaine amphoteric surfactant, hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium and a lignin derivative;
the weight ratio of the betaine amphoteric surfactant, the hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium and the lignin derivative is as follows: 2-10: 1-5: 1-50.
2. The corrosion-inhibiting, scale-inhibiting and bactericidal agent of claim 1 wherein: the betaine type amphoteric surfactant is any one of decyl dimethyl hydroxypropyl sulfobetaine, dodecyl dimethyl betaine, dodecyl ethoxy sulfobetaine, dodecyl dimethyl hydroxypropyl sulfobetaine, tetradecylamidopropyl hydroxypropyl sulfobetaine, cocamidopropyl betaine and laurylamidopropyl betaine.
3. The corrosion-inhibiting, scale-inhibiting and bactericidal agent of claim 1 wherein: the lignin derivative is any one of sodium lignin sulfonate or alkalized lignin.
4. The preparation method of the slow-release scale-inhibiting bactericide of claim 1, which is characterized by comprising the following steps: adding a prepared amount of lignin derivatives into a certain amount of water to fully dissolve; under the condition of stirring, adding the betaine amphoteric surfactant according to the weight ratio to dissolve and uniformly mix; adding hexadecyl dimethyl (2-sulfurous acid) ethyl ammonium under stirring, and uniformly mixing to obtain the product.
5. The use of the corrosion and scale inhibiting bactericide of claim 1 in oil and gas field development.
6. The method for inhibiting and sterilizing the scale of the reinjection water of the oil and gas field by using the corrosion and scale inhibition bactericide of claim 1 is characterized by comprising the following steps: adding a corrosion and scale inhibition bactericide with the effective concentration of 30-500 mg/L into reinjection water of an oil and gas field.
7. The method for improving the crude oil recovery rate of an oil and gas field by using the corrosion and scale inhibition bactericide of claim 1, which is characterized by comprising the following steps: the effective concentration of the corrosion and scale inhibition bactericide is 150-500 mg/L in reinjection water of an oil and gas field.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113003677A (en) * | 2021-02-22 | 2021-06-22 | 天津大港油田滨港集团博弘石油化工有限公司 | Efficient environment-friendly bactericide for oilfield produced water and preparation method thereof |
| CN113003677B (en) * | 2021-02-22 | 2023-04-04 | 天津大港油田滨港集团博弘石油化工有限公司 | Efficient environment-friendly bactericide for oilfield produced water and preparation method thereof |
| CN114106803A (en) * | 2021-11-24 | 2022-03-01 | 克拉玛依新科澳石油天然气技术股份有限公司 | Oil well slow-speed descaling antiscaling agent and preparation and use methods thereof |
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| CN111137991B (en) | 2022-04-22 |
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