CN107973418B - Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method - Google Patents

Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method Download PDF

Info

Publication number
CN107973418B
CN107973418B CN201610933914.2A CN201610933914A CN107973418B CN 107973418 B CN107973418 B CN 107973418B CN 201610933914 A CN201610933914 A CN 201610933914A CN 107973418 B CN107973418 B CN 107973418B
Authority
CN
China
Prior art keywords
corrosion
parts
scale inhibitor
acid
scale
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610933914.2A
Other languages
Chinese (zh)
Other versions
CN107973418A (en
Inventor
余正齐
王金华
李本高
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
Original Assignee
Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinopec Research Institute of Petroleum Processing, China Petroleum and Chemical Corp filed Critical Sinopec Research Institute of Petroleum Processing
Priority to CN201610933914.2A priority Critical patent/CN107973418B/en
Publication of CN107973418A publication Critical patent/CN107973418A/en
Application granted granted Critical
Publication of CN107973418B publication Critical patent/CN107973418B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • C02F5/145—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 combined with inorganic substances
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • 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
    • 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

Abstract

The invention relates to a composite corrosion and scale inhibitor, a corrosion and scale inhibition method of oil field water and an oil extraction method. The composite corrosion and scale inhibitor comprises the following components in parts by weight: 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent and optional zinc salt. The composite corrosion and scale inhibitor is especially suitable for corrosion and scale inhibition treatment of oil field water in harsh environment.

Description

Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
Technical Field
The invention relates to a composite corrosion and scale inhibitor, a corrosion and scale inhibition method of oil field water and an oil extraction method, in particular to a composite corrosion and scale inhibitor which can be used in a high-temperature and high-oxygen environment, a corrosion and scale inhibition method of oil field water in a high-temperature and high-oxygen environment and an oil extraction method of a deep well and an ultra-deep well.
Background
Crude oil produced in oil fields is accompanied by a large amount of produced water. Crude oil and produced water produced by an oil well are conveyed to a combined station through a gathering and conveying pipeline for oil-water separation, the separated sewage is conveyed to a deoxidizing station for removing dissolved oxygen in the water after being treated by a sewage treatment system to reach the standard, and finally the separated sewage is reinjected to a stratum through a water injection well of a water injection station, so that the circulation process of the produced water (hereinafter referred to as oilfield water) of the oil field is completed. The oil field water has high general mineralization degree and is usually dissolved with CO2And H2S and other corrosive gases are generally weakly acidic (pH is 5.5-7.0), so that the oilfield water has a strong corrosion effect on oilfield equipment and gathering and transportation pipelines. According to the initial estimate, the loss of corrosion to the oil extraction industry in China accounts for about 6% of the total output value of the industry, and appropriate anticorrosion measures are adopted, so that 30% -40% of the loss can be recovered. The corrosion inhibitor is most widely applied in various metal anticorrosion measures, the corrosion inhibitors mainly applied in oil fields at present are imidazoline, Mannich base, quaternary ammonium salt of nitrogen heterocycle, alkynol, pyridine, quinoline, thiourea and the like, and the action mechanism of the corrosion inhibitors is mostly an adsorption film forming mechanism, namely the corrosion inhibitor is formed on the surface of metalAnd a continuous or discontinuous adsorption film prevents the anode reaction or the cathode reaction in the corrosion process or simultaneously prevents the two electrode reactions from being carried out, so that the corrosion rate is reduced.
The corrosion inhibitors have the advantages and the disadvantages, for example, the corrosion inhibitors using the most common imidazolines have good corrosion inhibition effect, but are easy to hydrolyze in an alkaline environment. The alkynols have the advantage of good corrosion inhibition effect, but have the advantages of high toxicity, high addition amount, high price and easy volatilization. The problems of large dosage, high cost and poor compatibility exist in the common Mannich bases and quaternary ammonium salts. The common defects of the corrosion inhibitors are that the temperature resistance is not strong, the thermal cracking is easy to occur at high temperature, and the corrosion inhibitors are thoroughly oxidized into CO particularly in high-temperature and high-oxygen environments2And the corrosion inhibitor loses the corrosion inhibition effect, so the corrosion inhibitor is only suitable for the corrosion prevention of low-temperature and anaerobic environments in oil fields, such as a gathering system, a sewage treatment system, a water injection system, shallow oil well downhole equipment with low temperature and the like.
The underground temperature and pressure increase along with the increase of the well depth, and in recent years, along with the mass development of deep wells (4500-6000 meters) and ultra-deep wells (6000-9000 meters), the temperature resistance requirement of the corrosion inhibitor is higher and higher. In order to improve the recovery rate of crude oil, the crude oil is usually extracted by injecting gas into an oil well in the later stage of oil replacement by water injection, the effect of gas injection extraction is obvious, but serious underground corrosion problems can be caused. One important reason for this problem is that the injected gas contains a certain concentration of oxygen, and although replacing air with nitrogen has greatly reduced the oxygen content in the injected gas, the nitrogen purity can only reach 95.0% -97.5% due to the technical level of nitrogen control (membrane nitrogen control), and the gas also contains 2.5% -5.0% of oxygen, which still causes severe oxygen corrosion. To date, the art has also been reluctant to address this problem because: on one hand, the cost for replacing the anticorrosive material, using high-purity nitrogen or using a deoxidizer is too high; on the other hand, the existing corrosion and scale inhibitors are not suitable for the harsh high-temperature and high-oxygen environment, and the corrosion inhibition rate of the corrosion and scale inhibitors is generally only 20-30% within a reasonable dosage range.
CN 103030216A discloses a high-temperature-resistant oilfield scale inhibitor with an emulsification effect and a preparation method thereof. According to weight percentage, 2 to 9 percent of sodium hexametaphosphate, 13 to 20 percent of zinc sulfate, 151 to 3 percent of emulsifier OP-151, 10 to 18 percent of amino trimethylene phosphonic acid, 8 to 16 percent of 2-phosphonic acid-1, 2, 4-tricarboxylic acid butane and 4 to 6 percent of sodium sulfite. The agent has good effect under the conditions of 85 ℃ and low oxygen.
CN102911651A discloses a compound corrosion inhibitor for oil fields. The weight percentage of each component is as follows: 5 to 10 percent of sodium molybdate, 10 to 20 percent of sodium phosphate, 0.5 to 1 percent of AA-AMPS copolymer, 1 to 2 percent of amino trimethylene phosphonic acid and 1 to 2 percent of hydroxyl ethylidene diphosphonic acid. The corrosion inhibitor has better effect under the conditions of 70 ℃ and low oxygen.
CN104233310A discloses a compound imidazoline quaternary ammonium salt corrosion inhibitor and a preparation method thereof, wherein the compound imidazoline quaternary ammonium salt corrosion inhibitor comprises the following components in percentage by mass: 30-35% of alkyl acid imidazoline quaternary ammonium salt, 8-10% of nitrogen-containing organic multi-component phosphate, 1-2% of amphoteric surfactant, 0.5-1% of dispersant and 1-2% of cosolvent. The corrosion inhibitor has better effect under the conditions of 50 ℃ and low oxygen.
So far, in the field of water medium corrosion prevention, no high temperature (more than 100 ℃) resistant corrosion inhibitor exists, and no corrosion inhibitor which has high temperature resistance and oxidation resistance exists.
Disclosure of Invention
The invention mainly aims to provide a composite corrosion and scale inhibitor, a corrosion and scale inhibition method of oilfield water and an oil extraction method, and solve the problem of oilfield water corrosion in a high-temperature oxygen-containing environment.
The main content of the invention is as follows:
1. a composite corrosion and scale inhibitor comprises the following components in parts by weight: 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent and optional zinc salt.
2. The composite corrosion and scale inhibitor according to 1, wherein the inorganic phosphorus is at least one selected from the group consisting of sodium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, phosphoric acid, sodium tripolyphosphate, potassium tripolyphosphate, sodium hexametaphosphate, and potassium hexametaphosphate.
3. The composite corrosion and scale inhibitor is characterized in that the nitrogen-containing organic phosphonic acid is selected from at least one of amino trimethylene phosphonic Acid (ATMP), Ethylene Diamine Tetra Methylene Phosphonic Acid (EDTMPA), diethylene triamine penta methylene phosphonic acid (DTPMP), Hexamethylene Diamine Tetra Methylene Phosphonic Acid (HDTMPA), polyamino polyether methylene Phosphonic Acid (PAPEMP), bis 1, 6-hexamethylene triamine penta methylene phosphonic acid (BHMTPMPA); preferably aminotrimethylenephosphonic Acid (ATMP) and/or Polyaminopolyetherylmethylenephosphonic Acid (PAPEMP).
4. The composite corrosion and scale inhibitor according to any one of the preceding claims, wherein the phosphorus-free polymer corrosion and scale inhibitor is selected from at least one of polyepoxysuccinic acid (PESA), Polyaspartic Acid (PASP) and hydrolyzed polymaleic anhydride (HPMA); preferably polyepoxysuccinic acid (PESA).
5. The composite corrosion and scale inhibitor according to any one of the preceding claims, characterized in that, the sulfur-containing polymer scale inhibition and dispersion agent is selected from at least one of a binary copolymer (AA-AMPS) of acrylic acid and 2-acrylamide-2-methyl-propanesulfonic acid, a binary copolymer (MA-AMPS) of maleic anhydride and 2-acrylamide-2-methyl-propanesulfonic acid, a binary copolymer (AA-APES) of acrylic acid and ammonium allylpolyoxyethylene ether sulfate, a binary copolymer (MA-APES) of maleic anhydride and ammonium allylpolyoxyethylene ether sulfate, a ternary copolymer (AA-MA-AMPS) of acrylic acid, maleic anhydride and 2-acrylamide-2-methyl-propanesulfonic acid, and a ternary copolymer (AA-MA-APES) of acrylic acid, maleic anhydride and ammonium allylpolyoxyethylene ether sulfate.
6. The composite corrosion and scale inhibitor is characterized in that the sulfur-containing polymer scale inhibition and dispersion agent is at least one selected from a binary copolymer (AA-APES) of acrylic acid and ammonium allyl polyoxyethylene ether sulfate, a binary copolymer (MA-APES) of maleic anhydride and ammonium allyl polyoxyethylene ether sulfate, and a ternary copolymer (AA-MA-APES) of acrylic acid, maleic anhydride and ammonium allyl polyoxyethylene ether sulfate.
7. The composite corrosion and scale inhibitor according to any one of the preceding claims, characterized in that the zinc salt is selected from at least one of zinc chloride, zinc nitrate and zinc sulfate.
8. The composite corrosion and scale inhibitor is characterized by further comprising 58.5-85.5 parts by weight of water.
9. The composite corrosion and scale inhibitor is characterized by comprising inorganic phosphorus, nitrogen-containing organic phosphonic acid, a phosphorus-free polymer corrosion and scale inhibitor, a sulfur-containing polymer scale inhibition dispersant, optional zinc salt and water.
10. A preparation method of a composite corrosion and scale inhibitor comprises the steps of mixing 5-15 parts by mass of inorganic phosphorus, 7.5-17.5 parts by mass of nitrogen-containing organic phosphonic acid, 3-10 parts by mass of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts by mass of a sulfur-containing polymer scale inhibitor dispersant, and optional zinc salt with water to obtain the composite corrosion and scale inhibitor.
11. The preparation method according to 10 is characterized in that the amount of water is 58.5-85.5 parts by mass.
12. The production method according to claim 10 or 11, wherein the inorganic phosphorus is at least one selected from the group consisting of sodium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, phosphoric acid, sodium tripolyphosphate, potassium tripolyphosphate, sodium hexametaphosphate, and potassium hexametaphosphate.
13. The preparation method according to any one of 10 to 12, wherein the nitrogen-containing organic phosphonic acid is at least one selected from the group consisting of amino trimethylene phosphonic Acid (ATMP), ethylenediamine tetramethylene phosphonic acid (EDTMPA), diethylenetriamine pentamethylene phosphonic acid (DTPMP), hexamethylenediamine tetramethylmethylene phosphonic acid (HDTMPA), polyamino polyether methylene Phosphonic Acid (PAPEMP), bis 1, 6-hexamethylene triamine pentamethylene phosphonic acid (BHMTPMPA); preferably aminotrimethylenephosphonic Acid (ATMP) and/or Polyaminopolyetherylmethylenephosphonic Acid (PAPEMP).
14. The preparation method according to any one of 10 to 13, wherein the phosphorus-free polymer corrosion and scale inhibitor is at least one selected from polyepoxysuccinic acid (PESA), Polyaspartic Acid (PASP) and hydrolyzed polymaleic anhydride (HPMA); preferably polyepoxysuccinic acid (PESA).
15. The production method according to any one of 10 to 14, characterized in that, the sulfur-containing polymer scale inhibition and dispersion agent is selected from at least one of a binary copolymer (AA-AMPS) of acrylic acid and 2-acrylamide-2-methyl-propanesulfonic acid, a binary copolymer (MA-AMPS) of maleic anhydride and 2-acrylamide-2-methyl-propanesulfonic acid, a binary copolymer (AA-APES) of acrylic acid and ammonium allylpolyoxyethylene ether sulfate, a binary copolymer (MA-APES) of maleic anhydride and ammonium allylpolyoxyethylene ether sulfate, a ternary copolymer (AA-MA-AMPS) of acrylic acid, maleic anhydride and 2-acrylamide-2-methyl-propanesulfonic acid, and a ternary copolymer (AA-MA-APES) of acrylic acid, maleic anhydride and ammonium allylpolyoxyethylene ether sulfate.
16. The preparation method according to any one of 10 to 15, characterized in that the sulfur-containing polymer scale inhibition and dispersion agent is at least one selected from a binary copolymer (AA-APES) of acrylic acid and ammonium allyl polyoxyethylene ether sulfate, a binary copolymer (MA-APES) of maleic anhydride and ammonium allyl polyoxyethylene ether sulfate, and a ternary copolymer (AA-MA-APES) of acrylic acid, maleic anhydride and ammonium allyl polyoxyethylene ether sulfate.
17. The method according to any one of claims 10 to 16, wherein the zinc salt is at least one selected from the group consisting of zinc chloride, zinc nitrate and zinc sulfate.
18. A corrosion and scale inhibition method for oil field water is characterized in that 1-9 of the composite corrosion and scale inhibitor is added into the oil field water before the oil field water is injected into a stratum.
19. The corrosion and scale inhibition method according to 18 is characterized in that the temperature of the using environment of the oil field water is more than 100 ℃, and the oxygen partial pressure is more than or equal to 0.05 Mpa.
20. The corrosion and scale inhibition method according to 18 or 19 is characterized in that the operating environment of the oil field water is 125-160 ℃ and the oxygen partial pressure is 0.05-3.5 Mpa.
21. The corrosion and scale inhibition method according to any one of 18 to 20, wherein the degree of mineralization of the oil field water is 100000 to 300000 mg/L.
22. The corrosion and scale inhibition method according to any one of 18 to 21, characterized in that the amount of the composite corrosion and scale inhibitor is 450 to 550mg per liter of oil field water.
23. The corrosion and scale inhibition method according to any one of 18 to 22, characterized in that before the oil field water is injected into the formation, the pH value of the oil field water is adjusted to 4.5 to 6.0 by using inorganic acid and/or inorganic base.
24. An oil extraction method adopts a mode of mixed injection of water and gas, and is characterized in that 1-9 of the composite corrosion and scale inhibitor is added into water; the oxygen content of the gas is greater than 2% by volume fraction.
25. The method according to 24 is characterized in that the total amount of the inorganic phosphorus, the nitrogen-containing organic phosphonic acid, the phosphorus-free polymer corrosion and scale inhibitor, the sulfur-containing polymer scale inhibition and dispersion agent and the optional zinc salt added is 70-250 mg, preferably 100-200 mg, per liter of water.
26. The method according to 24 or 25, wherein the degree of mineralization of the water is 100000 to 300000 mg/L.
27. The method according to any one of claims 24 to 26, wherein the water and gas are co-injected into a deep well or ultra-deep well.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Technical terms in the present invention are defined according to the definitions given herein, and terms not defined are understood according to the ordinary meanings in the art.
In the context of this specification, anything or things not mentioned is directly applicable to the prior knowledge in the art, except where explicitly stated.
The prior documents show that the existing corrosion and scale inhibitor is not suitable for high-temperature and oxygen-containing environments, and the corrosion inhibition rate of the existing corrosion and scale inhibitor is only 20-30% in the past practice. The research of the invention finds that the underground temperature and pressure are increased along with the increase of the well depth, if certain oxygen is contained in the environment, organic corrosion inhibitors commonly used in oil fields, such as imidazoline, Mannich base, quaternary ammonium salt, alkynol, pyridine, quinoline, thiourea and the like, can be decomposed to lose the corrosion inhibition effect when the operation conditions (125-320 ℃ and 0.5-20 MPa) of wet oxidation are approached or reached. The research of the invention finds that although the nitrogen-containing organic phosphonic acid is decomposed under the high-temperature and oxygen-containing environment, the decomposition product has a certain corrosion inhibition effect and is beneficial to protecting the stability of the deposited film. The research of the invention also finds that the corrosion inhibition effect is relatively stable although the effect of singly using the inorganic corrosion inhibitor is limited under the environment with high temperature and oxygen.
The present invention was finally made based on the above knowledge and a number of experiments, and the details are as follows.
Composite corrosion and scale inhibitor
The invention provides a composite corrosion and scale inhibitor, which comprises the following components in parts by weight: 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent and optional zinc salt.
Preferably, the composite corrosion and scale inhibitor comprises the following components in parts by weight: 4.5-7.5 parts of inorganic phosphorus, 6-9 parts of nitrogen-containing organic phosphonic acid, 4-8 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent and 0-2 parts of a zinc salt.
More preferably, the composite corrosion and scale inhibitor comprises the following components in parts by weight: 4.5-7.5 parts of inorganic phosphorus, 6-9 parts of nitrogen-containing organic phosphonic acid, 4-8 parts of a phosphorus-free polymer corrosion and scale inhibitor, 5-8 parts of a sulfur-containing polymer scale inhibition and dispersion agent and 0.5-1.5 parts of a zinc salt.
According to the present invention, the inorganic phosphorus is not particularly limited, and may be various inorganic phosphorus used as a deposition film type corrosion inhibitor in the art, which may be either phosphate and/or acid salt of phosphoric acid, or polymeric phosphate, preferably phosphate and/or acid salt of phosphoric acid. The research of the invention finds that if a large amount of loss is not caused by precipitation, the inorganic phosphorus can play a certain corrosion inhibition role in a high-temperature oxygen-containing environment; in addition, in the main inorganic corrosion inhibitors, such as chromate, dichromate, nitrite, silicate, borate, molybdate, inorganic phosphorus, zinc salt and the like, a synergistic effect exists between the inorganic phosphorus and the nitrogen-containing organic phosphoric acid, and the inorganic phosphorus and the nitrogen-containing organic phosphoric acid can be matched to achieve a relatively ideal corrosion inhibition effect under the environment of high temperature and oxygen.
According to the present invention, the inorganic phosphorus may be selected from at least one of inorganic phosphorus selected from the group consisting of sodium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, phosphoric acid, sodium tripolyphosphate, potassium tripolyphosphate, sodium hexametaphosphate, and potassium hexametaphosphate.
According to the present invention, the inorganic phosphorus is preferably selected from at least one of inorganic phosphorus selected from the group consisting of sodium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, and phosphoric acid.
According to the present invention, the nitrogen-containing organophosphonic acid is not particularly limited and may be various nitrogen-containing organophosphonic acids used in the art. The research of the invention finds that in the organic compounds used in the field, although the nitrogen-containing organic phosphonic acid can be decomposed under the high-temperature and oxygen-containing environment, the decomposition products have certain corrosion inhibition effect and are beneficial to protecting the stability of the deposited film; therefore, under the environment of high temperature and oxygen, the nitrogen-containing organic phosphoric acid and inorganic phosphorus are matched to achieve a relatively ideal corrosion inhibition effect.
According to the invention, the nitrogen-containing organophosphonic acid may be selected from at least one of aminotrimethylene phosphonic Acid (ATMP), ethylenediamine tetramethylene phosphonic acid (EDTMPA), diethylenetriamine pentamethylene phosphonic acid (DTPMP), hexamethylenediamine tetramethylmethylene phosphonic acid (HDTMPA), polyaminopolyether methylene Phosphonic Acid (PAPEMP), bis 1, 6-hexylenediamine pentamethylene phosphonic acid (BHMTPMPA).
According to the invention, the nitrogen-containing organophosphonic acid is preferably aminotrimethylenephosphonic Acid (ATMP) and/or Polyaminopolyetherylmethylenephosphonic Acid (PAPEMP).
According to the invention, the phosphorus-free polymer corrosion and scale inhibitor is selected from at least one of polyepoxysuccinic acid (PESA), Polyaspartic Acid (PASP) and hydrolyzed polymaleic anhydride (HPMA). Preferably, the phosphorus-free polymer corrosion and scale inhibitor is preferably polyepoxysuccinic acid (PESA). The research of the invention finds that the phosphorus content of the composite formula can be greatly reduced by introducing a certain amount of the phosphorus-free polymer corrosion and scale inhibitor into the composite corrosion and scale inhibitor, so that the possible calcium phosphate scale deposition can be reduced on one hand, and the environment is protected on the other hand.
In the present invention, the sulfur-containing polymer scale inhibiting and dispersing agent is not particularly limited, and may be various sulfur-containing polymer scale inhibiting and dispersing agents conventionally used in the field of water treatment agents.
According to the invention, the sulfur-containing polymer scale inhibition and dispersion agent can be selected from a binary copolymer (AA-AMPS) of acrylic acid and 2-acrylamide-2-methyl-propanesulfonic acid, a binary copolymer (MA-AMPS) of maleic anhydride and 2-acrylamide-2-methyl-propanesulfonic acid, a binary copolymer (AA-APES) of acrylic acid and ammonium allylpolyoxyethylene ether sulfate, at least one of a binary copolymer (MA-APES) of maleic anhydride and ammonium allylpolyoxyethylene ether sulfate, a terpolymer (AA-MA-AMPS) of acrylic acid, maleic anhydride and 2-acrylamido-2-methyl-propanesulfonic acid, and a terpolymer (AA-MA-APES) of acrylic acid, maleic anhydride and ammonium allylpolyoxyethylene ether sulfate.
According to the invention, the sulfur-containing polymer scale inhibition and dispersion agent is preferably at least one selected from a binary copolymer (AA-APES) of acrylic acid and ammonium allyl polyoxyethylene ether sulfate, a binary copolymer (MA-APES) of maleic anhydride and ammonium allyl polyoxyethylene ether sulfate, and a ternary copolymer (AA-MA-APES) of acrylic acid, maleic anhydride and ammonium allyl polyoxyethylene ether sulfate.
According to the present invention, the zinc salt is not particularly limited, and may be various zinc salts conventionally used in the field of water treatment agents, and preferably at least one of zinc chloride, zinc nitrate and zinc sulfate. It will be appreciated that the choice of zinc salt is at least such as to ensure that the desired amount of zinc salt is completely soluble in water.
According to the invention, the amount of zinc salt may be from 0 to 5 parts, generally from 0 to 2 parts.
According to the invention, the composite corrosion and scale inhibitor can contain 58.5-85.5 parts of water, preferably 63.5-81.5 parts of water, and more preferably 66-80 parts of water by weight
According to the invention, the composite corrosion and scale inhibitor consists of inorganic phosphorus, nitrogen-containing organic phosphonic acid, a phosphorus-free polymer corrosion and scale inhibitor, a sulfur-containing polymer scale inhibition and dispersion agent, optional zinc salt and water.
According to the invention, the composite corrosion and scale inhibitor is suitable for corrosion and scale inhibition treatment of oilfield water with the temperature of 20-160 ℃, the total pressure of 1-70 Mpa, the oxygen partial pressure of 0.05-3.5 Mpa, the pH value of 4.5-7.5 and the mineralization degree of 100000-300000 mg/L.
Preparation method of composite corrosion and scale inhibitor
The invention provides a preparation method of a composite corrosion and scale inhibitor, which comprises the steps of mixing 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent, optional zinc salt and water by mass part to obtain the composite corrosion and scale inhibitor.
According to the invention, the amount of water is 58.5-85.5 parts by weight.
Preferably, 4.5-7.5 parts of inorganic phosphorus, 6-9 parts of nitrogen-containing organic phosphonic acid, 4-8 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent, 0-2 parts of zinc salt and 63.5-81.5 parts of water are mixed by mass parts.
More preferably, 4.5 to 7.5 parts of inorganic phosphorus, 6 to 9 parts of nitrogen-containing organic phosphonic acid, 4 to 8 parts of phosphorus-free polymer corrosion and scale inhibitor, 5 to 8 parts of sulfur-containing polymer scale inhibition and dispersion agent, 0.5 to 1.5 parts of zinc salt and 66 to 80 parts of water are mixed according to parts by mass.
The contents of the inorganic phosphorus, the nitrogen-containing organic phosphonic acid, the phosphorus-free polymer corrosion and scale inhibitor, the sulfur-containing polymer scale inhibition dispersant and the zinc salt and the usage amounts thereof are the same as those of the corresponding parts, and the details are not repeated herein.
Corrosion and scale inhibiting method for oil field water
The invention provides a corrosion and scale inhibition method for oil field water, which is characterized in that any one of the composite corrosion and scale inhibitors is added into the oil field water before the oil field water is injected into a stratum.
According to the invention, the using environment of the oil field water under the stratum has the temperature of more than 100 ℃ and the oxygen partial pressure of more than or equal to 0.05 Mpa.
According to the invention, the using environment of the oil field water under the stratum has the temperature of 125-160 ℃ and the oxygen partial pressure of 0.05-3.5 Mpa.
According to the invention, the degree of mineralization of the oil field water is 100000-300000 mg/L.
According to the invention, the dosage of the composite corrosion and scale inhibitor is generally 450-550 mg in terms of water per liter of oil field.
According to the present invention, it is preferable that the pH of the oil field water is adjusted to 4.5 to 6.0 with an inorganic acid and/or an inorganic base before the oil field water is injected into the formation.
The contents of the inorganic phosphorus, the nitrogen-containing organic phosphonic acid, the phosphorus-free polymer corrosion and scale inhibitor, the sulfur-containing polymer scale inhibition dispersant and the zinc salt and the usage amounts thereof are the same as those of the corresponding parts, and the details are not repeated herein.
Fourth, oil production method
The invention provides an oil extraction method, which adopts a mode of mixed injection of water and gas and is characterized in that any one of the compound corrosion and scale inhibitor is added into the water; the oxygen content of the gas is greater than 2% by volume fraction.
According to the invention, the total amount of the inorganic phosphorus, the nitrogen-containing organic phosphonic acid, the phosphorus-free polymer corrosion and scale inhibitor, the sulfur-containing polymer scale inhibition and dispersion agent and the optional zinc salt added is 60-230 mg, preferably 80-200 mg, and more preferably 110-160 mg, calculated by each liter of water.
According to the invention, the degree of mineralization of the water is 100000-300000 mg/L.
According to the invention, the water and gas are injected into a deep well or an ultra-deep well.
According to the invention, the gas is nitrogen; wherein, the oxygen content is 2.5-5% by volume fraction.
The contents of the inorganic phosphorus, the nitrogen-containing organic phosphonic acid, the phosphorus-free polymer corrosion and scale inhibitor, the sulfur-containing polymer scale inhibition dispersant and the zinc salt and the usage amounts thereof are the same as those of the corresponding parts, and the details are not repeated herein.
All features disclosed in this invention may be combined in any combination and such combinations are understood to be disclosed or described herein unless a person skilled in the art would consider such combinations to be clearly unreasonable. The numerical points disclosed in the specification include not only the numerical points specifically disclosed but also the endpoints of each numerical range, and any combination of these numerical points should be considered as the range disclosed or described in the present invention, regardless of whether the numerical pairs are disclosed herein.
The invention is further illustrated by the following examples. In the examples and comparative examples, the respective starting materials were commercially available or prepared by a known method.
In the examples and comparative examples, aminotrimethylenephosphonic Acid (ATMP), polyamino polyether methylenephosphonic acid (PAPEMP), ethylenediaminetetramethylenephosphonic acid (EDTMPA), diethylenetriaminepentamethylenephosphonic acid (DTPMP), hydroxyethylidenediphosphonic acid (HEDP), 2-phosphonobutane-1, 2, 4-tricarboxylic acid (PBTCA) were obtained from Shandongtai and Water treatment science, Inc.
In the examples and comparative examples, polyepoxysuccinic acid (PESA), Polyaspartic Acid (PASP), hydrolyzed polymaleic anhydride (HPMA), a copolymer of acrylic acid with 2-acrylamido-2-methyl-propanesulfonic acid (AA-AMPS), a copolymer of acrylic acid with ammonium allylpolyoxyethylene ether sulfate (AA-APES), a copolymer of maleic anhydride with ammonium allylpolyoxyethylene ether sulfate (MA-APES), a copolymer of acrylic acid with maleic anhydride and ammonium allylpolyoxyethylene ether sulfate (AA-MA-APES), and a copolymer of acrylic acid with maleic anhydride and 2-acrylamido-2-methyl-propanesulfonic acid (AA-MA-AMPS) were purchased from Beijing Linhua Water stabilizer factories.
Examples 1 to 6
Examples 1 to 6 are provided to illustrate the composite corrosion and scale inhibitor and the preparation method thereof provided by the invention.
The proportion of each component in the composite corrosion and scale inhibitor of the embodiment 1-6 is shown in the table 1.
TABLE 1 formulation and preparation method of composite corrosion and scale inhibitor
Figure BDA0001138495060000131
Comparative examples 1 to 6
The proportion of each component in the composite corrosion and scale inhibitor of the comparative examples 1-6 is shown in Table 2.
TABLE 2 formulation and preparation method of composite corrosion and scale inhibitor for comparison
Figure BDA0001138495060000132
Comparative examples 7 to 16
The proportion of each component in the composite corrosion and scale inhibitor of the comparative examples 7-16 is shown in tables 3 and 4.
TABLE 3 formulation and preparation method of composite corrosion and scale inhibitor for comparison
Figure BDA0001138495060000141
TABLE 4 formulation and preparation method of composite corrosion and scale inhibitor for comparison
Figure BDA0001138495060000142
Example 7
This example is provided to illustrate the effects of the composite corrosion and scale inhibitor in the foregoing examples and comparative examples.
Referring to a high-pressure dynamic corrosion test in the national oil and gas industry standard SY/T7025-; the composite corrosion and scale inhibitor obtained in examples 1 to 6 and comparative examples 1 to 16 was subjected to performance evaluation tests. The dosage of the composite corrosion and scale inhibitor is 500mg in terms of simulated water of each liter of oil field; in test 23, after the agent is added, the pH value of the oilfield simulation water is adjusted to 7; in other tests, after the agent is added, the pH value of the simulated water of the oil field is adjusted to 5; the test temperature is 140 ℃, the oxygen partial pressure is 2.6Mpa, and the test time is 6 hours.
According to the methods in GB/T16632-.
The test water is simulated oil field water, and the water quality is shown in the table 5.
TABLE 5 simulated water quality in oil field
Ion(s) mg/L
Cl- 133658
SO4 2- 150
HCO3 - 33.8
Na+ 71634.4
Ca2+ 11272.5
Mg2+ 1161.8
Br- 180
I- 10
Total up to 218100.6
The test effects of the composite corrosion and scale inhibitor prepared in examples 1 to 6 and comparative examples 1 to 16 are shown in Table 6. After the test is finished, the pH value of the simulated water in the oil field is detected,
the pH values of tests 1-12, 13, 16, 17, 19, 22 (examples 1-6, comparative example 7, comparative example 10, comparative example 11, comparative example 13, comparative example 16) were between 5.5 and 6.5, the pH values of tests 14, 15, 18, 20, 21 (comparative examples 8, 9, 12, 14, 15) were between 2.5 and 4.0, and the pH value of test 23 (comparative example 1) was 7.8.
TABLE 6 Corrosion and Scale inhibition Effect
Figure BDA0001138495060000161
Figure BDA0001138495060000171

Claims (21)

1. A composite corrosion and scale inhibitor is composed of inorganic phosphorus, nitrogen-containing organic phosphonic acid, a phosphorus-free polymer corrosion and scale inhibitor, a sulfur-containing polymer scale inhibition dispersant, zinc salt and water; the method comprises the following steps of: 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent and 0-5 parts of a zinc salt.
2. The composite corrosion and scale inhibitor according to claim 1, wherein the inorganic phosphorus is at least one selected from the group consisting of sodium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, phosphoric acid, sodium tripolyphosphate, potassium tripolyphosphate, sodium hexametaphosphate, and potassium hexametaphosphate.
3. The composite corrosion and scale inhibitor according to claim 1, wherein the nitrogen-containing organic phosphonic acid is at least one selected from the group consisting of aminotrimethylenephosphonic acid, ethylenediaminetetramethylenephosphonic acid, diethylenetriaminepentamethylenephosphonic acid, hexamethylenediaminetetramethylenephosphonic acid, polyaminopolyetherylmethylenephosphonic acid, bis-1, 6-hexamethylenetriaminepentamethylenephosphonic acid.
4. The composite corrosion and scale inhibitor according to claim 1, wherein the phosphorus-free polymer corrosion and scale inhibitor is at least one selected from the group consisting of polyepoxysuccinic acid, polyaspartic acid, and hydrolyzed polymaleic anhydride.
5. The composite corrosion and scale inhibitor according to claim 1, wherein the sulfur-containing polymer scale inhibiting and dispersing agent is at least one selected from the group consisting of a copolymer of acrylic acid and 2-acrylamido-2-methyl-propanesulfonic acid, a copolymer of maleic anhydride and 2-acrylamido-2-methyl-propanesulfonic acid, a copolymer of acrylic acid and ammonium allylpolyoxyethylene ether sulfate, a copolymer of maleic anhydride and ammonium allylpolyoxyethylene ether sulfate, a copolymer of acrylic acid and maleic anhydride and 2-acrylamido-2-methyl-propanesulfonic acid, and a copolymer of acrylic acid and maleic anhydride and ammonium allylpolyoxyethylene ether sulfate.
6. The composite corrosion and scale inhibitor according to claim 5, wherein the sulfur-containing polymer scale inhibiting and dispersing agent is at least one selected from the group consisting of a binary copolymer of acrylic acid and ammonium allylpolyoxyethylene ether sulfate, a binary copolymer of maleic anhydride and ammonium allylpolyoxyethylene ether sulfate, and a ternary copolymer of acrylic acid, maleic anhydride and ammonium allylpolyoxyethylene ether sulfate.
7. The composite corrosion and scale inhibitor according to claim 1, wherein the zinc salt is selected from at least one of zinc chloride, zinc nitrate and zinc sulfate.
8. The composite corrosion and scale inhibitor according to claim 1, wherein the composite corrosion and scale inhibitor contains 58.5 to 85.5 parts by weight of water.
9. A preparation method of a composite corrosion and scale inhibitor comprises the steps of mixing 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition dispersant, 0-5 parts of zinc salt and water by mass to obtain the composite corrosion and scale inhibitor.
10. The method according to claim 9, wherein the water is used in an amount of 58.5 to 85.5 parts by mass.
11. The method according to claim 9 or 10, wherein the zinc salt is used in an amount of 0 to 2 parts.
12. A corrosion and scale inhibition method for oil field water is characterized in that before the oil field water is injected into a stratum, a composite corrosion and scale inhibitor is added into the oil field water; the composite corrosion and scale inhibitor comprises the following components in parts by weight: 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent and 0-5 parts of a zinc salt.
13. The corrosion and scale inhibition method according to claim 12, wherein the oil field water is used in an environment with a temperature of more than 100 ℃ and an oxygen partial pressure of more than or equal to 0.05 Mpa.
14. The corrosion and scale inhibition method according to claim 13, wherein the oil field water is used in an environment with a temperature of 125-160 ℃ and an oxygen partial pressure of 0.05-3.5 Mpa.
15. The corrosion and scale inhibition method according to claim 12, wherein the degree of mineralization of the oil field water is 100000-300000 mg/L.
16. The corrosion and scale inhibition method according to claim 12, wherein the amount of the composite corrosion and scale inhibitor is 450 to 550mg per liter of oil field water.
17. The corrosion and scale inhibition method according to claim 12, wherein the pH of the oil field water is adjusted to 4.5 to 6.0 with an inorganic acid and/or an inorganic base before the oil field water is injected into the formation.
18. An oil recovery method, adopt the way of water and gas mixed injection, characterized by that, said water, add compound corrosion and scale inhibitor; the composite corrosion and scale inhibitor comprises the following components in parts by weight: 3-9 parts of inorganic phosphorus, 4.5-10.5 parts of nitrogen-containing organic phosphonic acid, 3-10 parts of a phosphorus-free polymer corrosion and scale inhibitor, 4-10 parts of a sulfur-containing polymer scale inhibition and dispersion agent and 0-5 parts of a zinc salt; the oxygen content of the gas is greater than 2% by volume fraction.
19. The method according to claim 18, wherein the total amount of the inorganic phosphorus, the nitrogen-containing organic phosphonic acid, the phosphorus-free polymer corrosion and scale inhibitor, the sulfur-containing polymer scale inhibition and dispersion agent and the zinc salt added is 60-230 mg per liter of water.
20. The method of claim 18, wherein the degree of mineralization of the water is 100000 to 300000 mg/L.
21. The method of claim 18, wherein the water and gas mixture is deep or ultra-deep.
CN201610933914.2A 2016-10-25 2016-10-25 Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method Active CN107973418B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610933914.2A CN107973418B (en) 2016-10-25 2016-10-25 Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610933914.2A CN107973418B (en) 2016-10-25 2016-10-25 Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method

Publications (2)

Publication Number Publication Date
CN107973418A CN107973418A (en) 2018-05-01
CN107973418B true CN107973418B (en) 2020-06-16

Family

ID=62004841

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610933914.2A Active CN107973418B (en) 2016-10-25 2016-10-25 Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method

Country Status (1)

Country Link
CN (1) CN107973418B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109294545A (en) * 2018-08-30 2019-02-01 天津正达科技有限责任公司 A kind of water solubility corrosion inhibitor for oil field and preparation method thereof
CN109231509A (en) * 2018-11-15 2019-01-18 山东泰和水处理科技股份有限公司 A kind of scale inhibitor for salt manufacture and its application
CN112143321A (en) * 2020-09-30 2020-12-29 安徽泰龙锌业有限责任公司 Cleaning pre-filming agent for zinc oxide cooling water and preparation method thereof
CN115746814A (en) * 2022-11-16 2023-03-07 河南海纳石油工程技术有限公司 Efficient environment-friendly blocking remover

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265185A (en) * 1975-11-25 1977-05-30 Kurita Water Ind Ltd Scale inhibitor for an evaporator for black liquor
CN101928074A (en) * 2009-06-25 2010-12-29 中国石油化工股份有限公司 Combinational antisludging agent and preparation method thereof
CN102732892A (en) * 2011-04-11 2012-10-17 中国石油化工股份有限公司 Metal corrosion inhibitor composition, metal corrosion inhibitor thereof and application thereof
CN103183417A (en) * 2011-12-30 2013-07-03 王炜 Medicament for treating composite water in hot water boiler as well as preparation method and use method thereof
CN105507858A (en) * 2015-07-20 2016-04-20 塔里木油田分公司勘探开发研究院 Immiscible gas injection and oil replacement type exploitation method for ultra-deep fractured-vuggy carbonate reservoirs

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265185A (en) * 1975-11-25 1977-05-30 Kurita Water Ind Ltd Scale inhibitor for an evaporator for black liquor
CN101928074A (en) * 2009-06-25 2010-12-29 中国石油化工股份有限公司 Combinational antisludging agent and preparation method thereof
CN102732892A (en) * 2011-04-11 2012-10-17 中国石油化工股份有限公司 Metal corrosion inhibitor composition, metal corrosion inhibitor thereof and application thereof
CN103183417A (en) * 2011-12-30 2013-07-03 王炜 Medicament for treating composite water in hot water boiler as well as preparation method and use method thereof
CN105507858A (en) * 2015-07-20 2016-04-20 塔里木油田分公司勘探开发研究院 Immiscible gas injection and oil replacement type exploitation method for ultra-deep fractured-vuggy carbonate reservoirs

Also Published As

Publication number Publication date
CN107973418A (en) 2018-05-01

Similar Documents

Publication Publication Date Title
CN107973422B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
CN107973417B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
CN107973424B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
CN107973418B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
CN105712504B (en) A kind of corrosion inhibiting and descaling agent for acidic high-temperature gas water, preparation method and application
CN104650838B (en) A kind of Oil/gas Well underground salt-resistant type corrosion inhibiting and descaling agent and preparation method thereof
CN101230260B (en) Compound inhibitor for exploitation of oil-gas field and preparation method thereof
US10094203B2 (en) Corrosion inhibitors for drilling fluid brines
CN102965090A (en) Corrosion inhibitor composition
Shen et al. Evaluation of scale inhibitors in Marcellus high-iron waters
CN107973419B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
CN105419763A (en) Casing annulus protection fluid and preparation method thereof
CN102259988A (en) Multifunctional water treatment agent for oilfield reinjection water
CN107973423B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
CN107973420B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
CN108219767A (en) A kind of offshore oilfield acid stimulation system and preparation method thereof
CN107973421B (en) Composite corrosion and scale inhibitor, corrosion and scale inhibition method for oil field water and oil extraction method
US11479864B2 (en) Corrosion inhibition treatment for aggressive fluids
US8573300B2 (en) Reducing sulfide in oil reservoir production fluids
CN106350047B (en) A kind of oil gas field corrosion inhibiter and preparation method thereof
CN112522710B (en) CO 2 Corrosion inhibitor main agent for inhibiting corrosion and scale of oil-driving injection and production system, preparation method and application
CN109837546B (en) Ammonium persulfate corrosion inhibitor used in production oil pipeline of offshore oil field and application thereof
CN108035701B (en) Corrosion inhibitor for air flooding and use method and application thereof
CN111807527A (en) Strontium-barium scale inhibitor for oil field water treatment and preparation method thereof
CN110278952B (en) Efficient corrosion inhibition bactericide for oilfield water injection

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant