CN110358515A - Oil well inhibition composition and preparation method thereof, Inhibitor For Oil Well System - Google Patents
Oil well inhibition composition and preparation method thereof, Inhibitor For Oil Well System Download PDFInfo
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- CN110358515A CN110358515A CN201910511892.4A CN201910511892A CN110358515A CN 110358515 A CN110358515 A CN 110358515A CN 201910511892 A CN201910511892 A CN 201910511892A CN 110358515 A CN110358515 A CN 110358515A
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- component
- oil well
- inhibition composition
- inhibitor
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
Abstract
The present invention relates to a kind of oil well inhibition compositions and preparation method thereof, Inhibitor For Oil Well System, belong to inhibiter technology field.The present invention provides a kind of oil well inhibition compositions, including component A, B component and component C；Component A includes alkyl phenol polyoxyethylene ether 40%~60%, thiocarbamide 30%~50% and benzotriazole 5%~15%；B component includes imidazolines polyethers 15%~25%, hexamethylenetetramine 10%~20% and solvent 55%~70%；Component C includes alkyl quaternary ammonium salts 25%~50% and solvent 50%~75%；The weight percent of component A, B component and component C are as follows: component A 30%~50%, B component 25%~40%, component C 10%~45%.The Inhibitor For Oil Well System that the oil well inhibition is obtained with composition can prevent high temperature, high salinity, CO2、H2The corrosion of S and low in acidity to tube and casing in downhole and surface gathering and transferring pipeline is suitable for heavy crude heat extraction.
Description
Technical field
The present invention relates to a kind of oil well inhibition compositions and preparation method thereof, Inhibitor For Oil Well System, belong to inhibiter technology
Field.
Background technique
In the development and production in oil field, the corrosion of oil well is always the significant problem for restricting oil field and normally exploiting.By
Contain Ca in the water of oil well produced liquid2+、Mg2+、CO2、SO4 2-、Cl-、HCO3 -、H2S, the corrosion such as SRB (sulfate reducing bacteria) are situated between
Matter usually will cause the corrosion of oil well and line equipment, bring high risks to production, and will cause huge economic loss.
Simultaneously corrosive medium to the adopting of crude oil, collect, defeated, during refining metal equipment will also result in heavy corrosion, lead to environmental pollution
And economic loss.
In thickened oil steam-stimulated thermal process, there are the characteristics such as high temperature, high salinity for production fluid, while oil field is in Produced Liquid
In may contain certain density aggressivity CO2, will lead to production fluid in low in acidity, it will to ground gathering line and downhole oil
Pipe generates corrosion.For this purpose, relatively effective method is that suitable corrosion inhibiter is added to carry out corrosion control.In the normal of non-thickened oil recovery
Oil field is advised, generally corrosion inhibiter is added simultaneously in well head, measuring station and multi-purpose station and carries out system anti-corrosion.But thickened oil steam-stimulated thermal recovery
When, vapor (steam) temperature is higher (120 DEG C or so) when due to starting open flow, and in the long period (according to production practice generally in 1-2
A month or so) temperature maintains 60 DEG C or more in inner oil tube and gathering line, and conventional Inhibitor For Oil Well System is in High Temperatures In Oil-well, Gao Kuang
It will lead to its ingredient under the harsh environment of change degree and low in acidity production fluid to change, to make corrosion inhibiter failure or inhibition
Effect is poor, therefore, corrosion inhibiter is seldom added in oil well, can only add after water-oil separating in sewage treatment and flood pattern
Corrosion inhibiter.
To solve the above problems, needing to provide one kind is suitable for high-temperature oil well, make tube and casing in downhole and surface gathering and transferring pipeline
The oil well inhibition composition that can be effectively protected.
Summary of the invention
The first purpose of this invention is to provide a kind of oil well inhibition composition, which can
Suitable for high-temperature oil well, it may make tube and casing in downhole and surface gathering and transferring pipeline that can be effectively protected.
Second object of the present invention is to provide the preparation method of above-mentioned oil well inhibition composition.
Third object of the present invention is to provide a kind of Inhibitor For Oil Well System, which can be effectively relieved underground
The corrosion of tubing and casing and surface gathering and transferring pipeline.
Technical scheme is as follows:
A kind of oil well inhibition composition, including component A, B component and component C；
Wherein, component A is mainly prepared by the raw material of following weight percent: alkyl phenol polyoxyethylene ether 40%~
60%, thiocarbamide 30%~50% and benzotriazole 5%~15%；
B component is mainly prepared by the raw material of following weight percent: 15%~25%, six first of imidazolines polyethers
Urotropine 10%~20% and solvent 55%~70%；
Component C includes following components in percentage by weight: alkyl quaternary ammonium salts 25%~50% and solvent 50%~75%；
The weight percent of component A, B component and component C are as follows: component A 30%~50%, B component 25%~40%, C group
Divide 10%~45%.
In oil well inhibition composition of the invention, the product that thiocarbamide obtains after reacting with benzotriazole can enhance oil well
Inhibition with composition at high temperature to the adsorptivity of metal, the product that is obtained after hexamethylenetetramine and imidazolines polyether reactant
Inhibition efficiency, component A and B component can be improved with the use of having the function of synergy, which is obtained with composition
Inhibitor For Oil Well System high temperature, high salinity, CO can be effectively relieved2、H2The complex environments such as S and low in acidity are to tube and casing in downhole and ground
The corrosion of face gathering line is suitable for heavy crude heat extraction, using " Y/T 5273-2014 oil field produced water process corrosion inhibiter performance
Index and evaluation method " evaluation, the corrosion inhibition rate under 80 DEG C of high-temperature oil wells is greater than 74%.
Preferably, the alkyl phenol polyoxyethylene ether is TX series alkyl phenol polyoxyethylene ether.
Preferably, the alkyl phenol polyoxyethylene ether is alkyl phenol polyoxyethylene ether TX-4.Alkyl phenol polyoxyethylene ether TX-
4 can promote reacting for thiocarbamide and benzotriazole, accelerate reaction speed, improve product chemistry stability.
Preferably, the imidazolines polyethers is nonionic surface active agent and/or anionic surfactant.It is non-
The imidazolines polyethers of ionic surfactant and/or anionic surfactant can be reacted with hexamethylenetetramine, be mentioned
High inhibition efficiency preferably plays corrosion mitigating effect so that adsorptivity of the medicament in metal surface enhances.
Preferably, the imidazolines polyethers is imidazoline polyoxyethylene ether.The imidazolines polyethers may make corrosion inhibiter
Chemical property is more stable.
Preferably, the alkyl quaternary ammonium salts is dodecane hexadecyltrimethylammonium chloride or dodecyl dimethyl benzyl
Ammonium chloride.The alkyl quaternary ammonium salts of dodecane hexadecyltrimethylammonium chloride or dodecyl benzyl dimethyl ammonium chloride is conducive to
Promote dissolving each other for component A and B component, so that component A and B component give full play to synergistic effect, so that inhibition obtained
Agent can satisfy the inhibition demand of the complex environments such as high temperature, high salinity.
Preferably, the solvent is water or methanol.Cost can be greatly reduced as solvent in water, and methanol can be mentioned as solvent
High solute effect.
A kind of preparation method of above-mentioned oil well inhibition composition, comprising the following steps:
(1) preparation of component A, B component and component C
(a) alkyl phenol polyoxyethylene ether, thiocarbamide and benzotriazole are mixed, reaction obtains component A；
(b) imidazolines polyethers, hexamethylenetetramine and solvent are mixed, reaction obtains B component；
(c) alkyl quaternary ammonium salts and solvent are mixed, obtains component C；
(2) mixing of component A, B component and component C
Component A, B component and component C are mixed, oil well inhibition composition is obtained.
Oil well inhibition of the invention is only needed that each raw material is mixed to get component A, B component and component C respectively with composition,
These three components are mixed again, oil well inhibition composition can be prepared.The preparation method is easy to operate, without precision
Instrument and equipment, it is easy to use.
It is understood that step (a), step (b) and step (c) have no sequencing, it can be simultaneously or according to any suitable
Component A, B component and component C is made according to step (a), step (b) and step (c) in sequence.
A kind of Inhibitor For Oil Well System, the Inhibitor For Oil Well System include above-mentioned oil well inhibition composition and solvent.
Inhibitor For Oil Well System of the invention only needs to mix oil well inhibition composition and solvent, and oil well can be prepared
Corrosion inhibiter, the Inhibitor For Oil Well System can at the construction field (site) be diluted oil well inhibition with composition, can also be prepared at the scene
To Inhibitor For Oil Well System, then diluted on site is used.
Preferably, weight percentage of the oil well inhibition composition in Inhibitor For Oil Well System is 1%~10%.Weight
Amount percentage composition be 1%~10% oil well inhibition with composition may make Inhibitor For Oil Well System effectively prevent high temperature, high salinity,
CO2、H2The complex environments such as S and low in acidity cause to corrode to tube and casing in downhole and surface gathering and transferring pipeline, can also effectively control into
This.If weight percentage of the oil well inhibition composition in Inhibitor For Oil Well System is greater than 10%, although corrosion mitigating effect will not
It reduces, but cost will improve, and be unfavorable for effectively controlling cost.
Specific embodiment
The invention will be further described With reference to embodiment.
In oil well inhibition composition of the invention, the type of the solvent in B component and component C is not construed as limiting, it can be with
Using the conventional solvent that may make imidazolines polyethers, hexamethylenetetramine and alkyl quaternary ammonium salts dissolution in this field, example
Such as, water or C be can be1-C4Alcohol.
In oil well inhibition composition of the invention, the solvent in B component and component C can be identical, be also possible to
Different.
In oil well inhibition composition of the invention, the alkyl phenol polyoxyethylene ether be alkyl phenol polyoxyethylene ether it is non-from
Sub- surfactant.
In oil well inhibition composition of the invention, the alkyl quaternary ammonium salts is alkyl quaternary ammonium salts cation surface activating
Agent.
In oil well inhibition composition of the invention, the oil well inhibition composition includes component A, B component and C group
Point, it further include the auxiliary material of this field routine.
In oil well inhibition composition of the invention, the component A is mainly prepared by the raw material of following weight percent
It arrives: alkyl phenol polyoxyethylene ether 40%~60%, thiocarbamide 30%~50% and benzotriazole 5%~15%, the component A
Raw material further includes the auxiliary material of this field routine.
In oil well inhibition composition of the invention, the B component is mainly prepared by the raw material of following weight percent
It arrives: imidazolines polyethers 15%~25%, hexamethylenetetramine 10%~20% and solvent 55%~70%, the B component
Raw material further includes the auxiliary material of this field routine.
In oil well inhibition composition of the invention, the component C includes following components in percentage by weight: quaternary ammonium alkyl
Salt 25%~50% and solvent 50%~75%, the component C further include the auxiliary material of this field routine.
In oil well inhibition composition of the invention, in B component, the dosage of solvent is not construed as limiting, as long as can make
Imidazolines polyethers and hexamethylenetetramine dissolution are obtained, can be 55%~70% weight percent, the dosage of solvent
70% can also be more than, the content of imidazolines polyethers and hexamethylenetetramine is less in B component at this time, component A, B component and C
When component mixes, the dosage of B component can be increase accordingly.Likewise, the dosage of solvent can also be less than 55%, at this time in B component
The content of imidazolines polyethers and hexamethylenetetramine is more, when component A, B component and component C mix, can accordingly reduce B component
Dosage.
In oil well inhibition composition of the invention, in component C, the dosage of solvent is not construed as limiting, as long as can make
Alkyl quaternary ammonium salts dissolution is obtained, can be 50%~75% weight percent, the dosage of solvent can also be more than 75%, this
When component C in alkyl quaternary ammonium salts content it is less, when component A, B component and component C mix, the dosage of component C can be increase accordingly.
Likewise, the dosage of solvent can also be less than 50%, the dosage of solvent is few in component C at this time, and alkyl quaternary ammonium salts contains in component C
It measures more, when component A, B component and component C mix, can accordingly reduce the dosage of component C.
In the preparation method of oil well inhibition composition of the invention, component A, the system of B component and component C of step (1)
In standby, step (a), step (b) and step (c) do not have sequencing, for example, can carry out simultaneously, it can also be with random order
Successively carry out.
In the preparation method of oil well inhibition composition of the invention, the temperature of the mixing is room temperature.Oil well inhibition is used
The preparation method of composition can be prepared at normal temperature, be not required to additional heating or cooling, and preparation is convenient.
The step of step (1) (a), step (b) and step (c) and the temperature of the mixing in step (2) are room temperature.
The actual temp of " room temperature " is not construed as limiting, for example, it may be temperature within the scope of 10 DEG C~30 DEG C, including but not
It is limited to 20 DEG C, 22 DEG C, 25 DEG C, 28 DEG C or 30 DEG C.
In the preparation method of oil well inhibition composition of the invention, (a), step (b) and step the step of step (1)
(c) and in step (2), the mode of mixing is not construed as limiting, for example, can be mixed by the way of stirring.
In Inhibitor For Oil Well System of the invention, the type of solvent is not construed as limiting, it can make using this field is conventional
The solvent that oil well inhibition is dissolved with composition is obtained, solvent for use in oil well inhibition composition can be used.The solvent is
Water or methanol.Cost can be greatly reduced as solvent in water, and solute effect can be improved as solvent in methanol.
The embodiment 1 of oil well inhibition composition
The oil well inhibition composition of the present embodiment, is made of component A, B component and component C.
Wherein, component A is prepared by the raw material of following weight percent: alkyl phenol polyoxyethylene ether TX-4 be 60%,
Thiocarbamide 30% and benzotriazole 10%.
B component is prepared by the raw material of following weight percent: imidazoline polyoxyethylene ether 15%, hexamethylenetetramine
15% and water 70%.
Component C is obtained by the raw material of following weight percent: dodecane hexadecyltrimethylammonium chloride 35% and water
65%.
The weight percent of component A, B component and component C are as follows: component A 50%, B component 25%, component C 25%.
The embodiment 2 of oil well inhibition composition
The oil well inhibition composition of the present embodiment, is made of component A, B component and component C.
Wherein, component A is prepared by the raw material of following weight percent: alkyl phenol polyoxyethylene ether TX-4 be 50%,
Thiocarbamide 40% and benzotriazole 10%.
B component is prepared by the raw material of following weight percent: imidazoline polyoxyethylene ether 20%, hexamethylenetetramine
10% and water 70%.
Component C is obtained by the raw material of following weight percent: dodecane hexadecyltrimethylammonium chloride 30% and water
70%.
The weight percent of component A, B component and component C are as follows: component A 40%, B component 30%, component C 30%.
The embodiment 3 of oil well inhibition composition
The oil well inhibition composition of the present embodiment, is made of component A, B component and component C.
Wherein, component A is prepared by the raw material of following weight percent: alkyl phenol polyoxyethylene ether TX-4 be 45%,
Thiocarbamide 50% and benzotriazole 5%.
B component is prepared by the raw material of following weight percent: imidazoline polyoxyethylene ether 20%, hexamethylenetetramine
15% and water 65%.
Component C is obtained by the raw material of following weight percent: dodecane hexadecyltrimethylammonium chloride 25% and methanol
75%.
The weight percent of component A, B component and component C are as follows: component A 42.8%, B component 28.6%, component C 28.6%.
The embodiment 4 of oil well inhibition composition
The oil well inhibition composition of the present embodiment and the embodiment 1 of oil well inhibition composition the difference is that,
The type of alkyl quaternary ammonium salts is different, and alkyl quaternary ammonium salts is dodecyl benzyl dimethyl ammonium chloride in the present embodiment.Remaining raw material
And dosage is the same as the embodiment 1 of oil well inhibition composition.
The embodiment 5 of oil well inhibition composition
The oil well inhibition composition of the present embodiment and the embodiment 1 of oil well inhibition composition the difference is that,
The type of alkyl quaternary ammonium salts is different, and alkyl quaternary ammonium salts is dodecyldimethyl ammonium oxide in the present embodiment.Remaining raw material and use
Measure the embodiment 1 with oil well inhibition composition.
The embodiment 1 of the preparation method of oil well inhibition composition
The preparation method of the oil well inhibition composition of the present embodiment claims according to the embodiment 1 of oil well inhibition composition
Take raw material, comprising the following steps:
(a) at normal temperature, the mixture of alkyl phenol polyoxyethylene ether, thiocarbamide and benzotriazole is stirred, makes it
It mixes, reaction obtains component A；
(b) at normal temperature, imidazolines polyethers, hexamethylenetetramine and water are stirred, make its mixing, reaction obtains
B component；
(c) at normal temperature, alkyl quaternary ammonium salts and solvent are stirred, make its mixing, obtains component C；
(d) at normal temperature, component A, B component and component C are mixed, stirring makes its mixing, obtains oil well inhibition combination
Object.
The embodiment 2~5 of the preparation method of oil well inhibition composition
Each raw material and its dosage and oil well inhibition group in the embodiment 2~5 of the preparation method of oil well inhibition composition
The embodiment 2~5 for closing object corresponds, and the preparation method of the embodiment 2~5 of the preparation method of oil well inhibition composition is the same as oil
The embodiment 1 of the preparation method of well inhibition composition.
The embodiment 1 of Inhibitor For Oil Well System
The Inhibitor For Oil Well System of the present embodiment, by oil well inhibition composition embodiment 1 oil well inhibition composition and
Water composition, wherein weight percentage of the oil well inhibition composition in Inhibitor For Oil Well System is 1%.
The embodiment 2~5 of Inhibitor For Oil Well System
The embodiment 2~5 of Inhibitor For Oil Well System is successively used by the oil well inhibition of the embodiment 2~5 of oil well inhibition composition
Composition and water composition, wherein weight percentage of the oil well inhibition composition in Inhibitor For Oil Well System is 1%.
That is, the embodiment 2 of the oil well inhibition composition of the embodiment 2 of oil well inhibition composition in Inhibitor For Oil Well System
Weight percentage in Inhibitor For Oil Well System is 1%.
Oil of the oil well inhibition composition of the embodiment 3 of oil well inhibition composition in the embodiment 3 of Inhibitor For Oil Well System
Weight percentage in well corrosion inhibiter is 1%.
Oil of the oil well inhibition composition of the embodiment 4 of oil well inhibition composition in the embodiment 4 of Inhibitor For Oil Well System
Weight percentage in well corrosion inhibiter is 1%.
Oil of the oil well inhibition composition of the embodiment 5 of oil well inhibition composition in the embodiment 5 of Inhibitor For Oil Well System
Weight percentage in well corrosion inhibiter is 1%.
The embodiment 6~8 of Inhibitor For Oil Well System
The embodiment 6~8 of Inhibitor For Oil Well System is successively used by the oil well inhibition of the Examples 1 to 3 of oil well inhibition composition
Composition and water composition, wherein weight percentage of the oil well inhibition composition in Inhibitor For Oil Well System is 10%.
That is, the embodiment 6 of the oil well inhibition composition of the embodiment 1 of oil well inhibition composition in Inhibitor For Oil Well System
Weight percentage in Inhibitor For Oil Well System is 10%.
Oil of the oil well inhibition composition of the embodiment 2 of oil well inhibition composition in the embodiment 7 of Inhibitor For Oil Well System
Weight percentage in well corrosion inhibiter is 10%.
Oil of the oil well inhibition composition of the embodiment 3 of oil well inhibition composition in the embodiment 8 of Inhibitor For Oil Well System
Weight percentage in well corrosion inhibiter is 10%.
Comparative example 1
The oil well inhibition composition of this comparative example and the embodiment 1 of oil well inhibition composition the difference is that,
This comparative example only has component A and component C, specifically, the oil well inhibition composition of this comparative example, by component A and component C group
At.
Wherein, component A is prepared by the raw material of following weight percent: alkyl phenol polyoxyethylene ether TX-4 be 60%,
Thiocarbamide 30% and benzotriazole 10%.
Component C is obtained by the raw material of following weight percent: dodecane hexadecyltrimethylammonium chloride 35% and water
65%.
The weight percent of component A and component C are as follows: component A 66.7%, component C 33.3%.
Comparative example 2
The oil well inhibition composition of this comparative example and the embodiment 1 of oil well inhibition composition the difference is that,
This comparative example only has B component and component C, specifically, the oil well inhibition composition of this comparative example, by B component and component C group
At.
Wherein, B component is prepared by the raw material of following weight percent: 15%, six first of imidazoline polyoxyethylene ether
Urotropine 15% and water 70%.
Component C is obtained by the raw material of following weight percent: dodecane hexadecyltrimethylammonium chloride 35% and water
65%.
The weight percent of B component and component C are as follows: B component 50%, component C 50%.
Comparative example 3
The oil well inhibition composition of this comparative example and the embodiment 1 of oil well inhibition composition the difference is that,
This comparative example does not distinguish component A, B component and component C, directly mixes each raw material, specifically, this comparative example is by following weight
The raw material of part is prepared:
Alkyl phenol polyoxyethylene ether TX-4 is 120 parts, 60 parts of thiocarbamide, 20 parts of benzotriazole, imidazoline polyoxyethylene ether
15 parts, 15 parts of hexamethylenetetramine, 70 parts of water, 35 parts of dodecane hexadecyltrimethylammonium chloride and 65 parts of water.
The oil well inhibition of this comparative example is directly to mix each raw material with composition, and oil well inhibition composition is made.
Test example 1
The effect for the Inhibitor For Oil Well System that the Examples 1 to 3 of oil well inhibition composition obtains is detected, in order to guarantee
The accuracy of experimental result, for test medium directly from the wellhead sampling of heavy crude heat extraction oil well, experimental temperature controls the experiment at 85 DEG C
Steps are as follows:
1, prepare sample bucket one, sampling operation is as follows: scene sebific duct connects well mouth of oil well sample cock, and sebific duct is another
Sample bucket bottom is inserted into prevent sampling process from exposing oxygen in one end, and sampling weight is that (quantity cannot be guaranteed 45kg very little in sample bucket
The representativeness of sample takes in sample bucket full oil water mixture to reduce the influence for exposing oxygen), it will be equipped with oil water mixture after the completion of sampling
Sample bucket natural subsidence 5 hours (time, too short water-oil separating was not thorough) indoors；
2, prepare test lacing film 24,12 test lacing films are N80 steel, and 12 test lacing films are 20# steel, by all tests
Lacing film is impregnated with 75 DEG C of petroleum ether and removes its surface grease with absorbent cotton, is placed into and is impregnated 5min in dehydrated alcohol, into one
Walk degreasing and dehydration；The test lacing film for then taking out soaked in absolute ethyl alcohol is placed on filter paper, dries up lacing film with cold wind, then use drying
Filter paper wrap, be placed in drier place 1h after weigh, be accurate to 0.1mg；
3, water is added to be configured to 1wt%'s respectively the Inhibitor For Oil Well System that the Examples 1 to 3 of oil well inhibition composition obtains
Aqueous solution is to get embodiment 1, the embodiment of Inhibitor For Oil Well System 2, the embodiment of Inhibitor For Oil Well System 3 for arriving Inhibitor For Oil Well System, with doctor
Take the embodiment 1, the embodiment of Inhibitor For Oil Well System 2, oil well of the Inhibitor For Oil Well System of 0.5ml slow respectively with graded syringe (1ml)
The embodiment 3 of erosion agent is added to No. 1 experiment container (500ml wide-mouth bottle), No. 2 experiment containers (500ml wide-mouth bottle), No. 3 experiments
In container (500ml wide-mouth bottle)；
4, water is added to be configured to 10wt% respectively the Inhibitor For Oil Well System that the Examples 1 to 3 of oil well inhibition composition obtains
Aqueous solution to get arrive Inhibitor For Oil Well System embodiment 6, the embodiment of Inhibitor For Oil Well System 7, the embodiment of Inhibitor For Oil Well System 8, use
Medical graded syringe (1ml) takes embodiment 1, the embodiment of Inhibitor For Oil Well System 2, oil well of the Inhibitor For Oil Well System of 0.5ml respectively
The embodiment 3 of corrosion inhibiter is added to No. 4 experiment containers (500ml wide-mouth bottle), No. 5 experiment containers (500ml wide-mouth bottle), No. 6 realities
It tests in container (500ml wide-mouth bottle)；
5, six experiment containers (500ml wide-mouth bottle) discharge sky therein that Inhibitor For Oil Well System is added is purged respectively with nitrogen
Gas, while 7, No. 8 experiment containers (500ml wide-mouth bottle) of blank assay container for preparing that Inhibitor For Oil Well System is not added are for doing blank reality
It tests；
6, prepare an emulsion tube, one end of emulsion tube is connected a glass tube, and (length of glass tube is greater than sample bucket
Bung height), then by glass tube be inserted into sample bucket bottom, after sample stablize after by emulsion tube respectively by sampler barrel bottom
Water sample is directed into 1,2,3,4,5,6,7, No. 8 purged experiment container of nitrogen that (water sample that each experiment container imports is
500ml), the process for importing sampling liquid will ensure glass tube and the latex seal of tube, avoid being mixed into air；
7, three test lacing films are hung in each experiment container respectively with nylon rope, three test pieces in each experiment container it
Between spacing be evenly arranged (generally in 3cm or so), N80 steel is hung in 1,2,3, No. 7 experiment container, in 4,5,6, No. 8 experiment containers
20# steel is hung, the upper end of each test lacing film is 3cm or more, test piece spacing 1cm or more, test bottle rubber plug plug away from liquid level distance
Close envelope, the assay flask of blank test also stopper sealing with rubber plug；
8, four experiment containers are put into insulating box simultaneously, set calorstat temperature as 80 DEG C, places 7 days；
9, test piece is taken out, erosion profile is observed and recorded, rinsed immediately with clear water and is dried with filter paper, with 75 DEG C of petroleum ether
It impregnates and removes strip greasy dirt with absorbent cotton, be put into the 10wt% hydrochloric acid of the hexamethylenetetramine containing 1wt% and impregnate
5min (this solution is that the hexamethylenetetramine of 1 parts by weight and 10% mixed in hydrochloric acid of 99 parts by weight obtain), while using absorbent cotton
The corrosion product of light examination strip.It takes out test piece and rinses the residual acid of strip with clear water, be then placed in dehydrated alcohol and be dehydrated,
It takes out test piece to be placed on filter paper, dries up test piece with cold wind, then wrapped with filter paper, be placed in drier and place 1h weighing, be accurate to
0.1mg；
10,3 groups of Duplicate Samples are done in every group of experiment；
11, uniform corrosion inhibition rate: η=(△ m is calculated as follows0-△m1)/△m0× 100%
In formula: η is corrosion inhibition rate, is expressed as a percentage；△m0(g) is lost for the average quality of test piece in blank assay；△m1
To add the average quality of test piece in Inhibitor For Oil Well System experiment to lose (g).
By the above method, the reality of 3 mouthfuls of high-temperature oil well Produced Liquids to oil well inhibition composition in certain oil field is respectively adopted
The embodiment 6~8 of the Examples 1 to 3 and Inhibitor For Oil Well System of applying the Inhibitor For Oil Well System that example 1~3 obtains is evaluated, normal to oil field
The corrosion inhibition rate of N80 steel and 20# steel is 73% or more.Specifically it is shown in Table 1.
1 oil well inhibition composition of table and Inhibitor For Oil Well System evaluation result table
As can be drawn from Table 1, the Examples 1 to 3 of Inhibitor For Oil Well System and the equal high temperature resistant of the embodiment of Inhibitor For Oil Well System 6~8,
The shortcomings that performance is stablized, and corrosion mitigating effect is excellent, overcomes existing Inhibitor For Oil Well System can directly add from oil well, be suitable for high temperature
Oil well can prevent high temperature, high salinity, CO2、H2Corrode caused by S and low in acidity.
The embodiment 1 of oil well inhibition composition dilutes 100 times and 10 times respectively and obtains 1 He of embodiment of Inhibitor For Oil Well System
The embodiment 6 of Inhibitor For Oil Well System, the embodiment 2 of oil well inhibition composition dilute 100 times and 10 times respectively and obtain oil well inhibition
The embodiment 2 of agent and the embodiment 7 of Inhibitor For Oil Well System, the embodiment 3 of oil well inhibition composition dilute 100 times and 10 times respectively
Obtain the embodiment 3 of Inhibitor For Oil Well System and the embodiment 8 of Inhibitor For Oil Well System.The Examples 1 to 3 of oil well inhibition composition is distinguished
The Examples 1 to 3 of 100 times of obtained Inhibitor For Oil Well Systems is diluted at a high temperature of 80 DEG C, places 7 days, the sustained release rate of N80 steel is reached
To 74.9% or more.The Examples 1 to 3 of oil well inhibition composition dilutes the embodiment for the Inhibitor For Oil Well System that 10 times obtain respectively
6~8 at a high temperature of 80 DEG C, place 7 days, reach 74.8% or more to the sustained release rate of 20# steel.
N80 steel compares 20# steel with stronger corrosion resistance, as shown in Table 1, the Examples 1 to 3 and oil of Inhibitor For Oil Well System
Thus the sustained release rate that 6~8 pairs of N80 steel of embodiment of well corrosion inhibiter compare 20# steel may be used in 74.8%~76.4% range
See, with the raising of concentration, the corrosion mitigating effect of the embodiment 6~8 of Inhibitor For Oil Well System is better than the Examples 1 to 3 of Inhibitor For Oil Well System.
It can be seen that the concentration of Inhibitor For Oil Well System is higher, slow release effect is better, this is also indicated that, if oil well inhibition composition is in oil
Weight percentage in well corrosion inhibiter is greater than 10%, although corrosion mitigating effect will not reduce, cost will be improved, and is unfavorable for having
Effect control cost.
Test example 2
According to detection method identical with test example 1, Examples 1 to 5 and comparative example 1 to oil well inhibition composition~
3 oil well inhibition dilutes 100 times with composition and is detected, and it is 2-10-4H that Produced Liquid, which samples pound sign, and test lacing film is N80
Steel sets calorstat temperature as 80 DEG C, places 7 days；Three samples of every group of measuring are averaged, obtained result such as table 2
It is shown.
The sustained release rate of the Inhibitor For Oil Well System of the Examples 1 to 5 and comparative example 1~3 of 2 oil well inhibition composition of table
| Corrosion inhibition rate % | |
| Embodiment 1 | 75.1 |
| Embodiment 2 | 74.9 |
| Embodiment 3 | 75.1 |
| Embodiment 4 | 65.02 |
| Embodiment 5 | 55.14 |
| Comparative example 1 | 57.25 |
| Comparative example 2 | 59.14 |
| Comparative example 3 | 61.17 |
The experimental results showed that can using the oil well inhibition composition in the embodiment 1-3 of oil well inhibition composition
Reach the excellent corrosion inhibiter of corrosion mitigating effect；Using the oil well inhibition composition of the embodiment 4-5 of oil well inhibition composition, though
So there is certain corrosion mitigating effect, but relatively high production requirement cannot be met the requirements, in comparative example 1-3, using single group
Divide or not according to the method for substep preparation, the corrosion mitigating effect of obtained corrosion inhibiter is relatively poor, not being able to satisfy higher production needs
It asks.
Claims (10)
1. a kind of oil well inhibition composition, which is characterized in that including component A, B component and component C；
Wherein, component A is mainly prepared by the raw material of following weight percent: alkyl phenol polyoxyethylene ether 40%~60%,
Thiocarbamide 30%~50% and benzotriazole 5%~15%；
B component is mainly prepared by the raw material of following weight percent: imidazolines polyethers 15%~25%, six methines four
Amine 10%~20% and solvent 55%~70%；
Component C includes following components in percentage by weight: alkyl quaternary ammonium salts 25%~50% and solvent 50%~75%；
The weight percent of component A, B component and component C are as follows: component A 30%~50%, B component 25%~40%, component C
10%~45%.
2. oil well inhibition composition according to claim 1, which is characterized in that the alkyl phenol polyoxyethylene ether is TX
Serial alkyl phenol polyoxyethylene ether.
3. oil well inhibition composition according to claim 2, which is characterized in that the alkyl phenol polyoxyethylene ether is alkane
Base phenol polyethenoxy ether TX-4.
4. oil well inhibition composition according to claim 1, which is characterized in that the imidazolines polyethers is nonionic
Type surfactant and/or anionic surfactant.
5. oil well inhibition composition according to claim 1, which is characterized in that the imidazolines polyethers is imidazoline
Polyoxyethylene ether.
6. oil well inhibition composition according to claim 1, which is characterized in that the alkyl quaternary ammonium salts is dodecane ten
Six alkyl trimethyl ammonium chlorides or dodecyl benzyl dimethyl ammonium chloride.
7. oil well inhibition composition according to claim 1, which is characterized in that the solvent is water or methanol.
8. a kind of preparation method of oil well inhibition composition as described in claim 1, which is characterized in that including following step
It is rapid:
(1) preparation of component A, B component and component C
(a) alkyl phenol polyoxyethylene ether, thiocarbamide and benzotriazole are mixed, reaction obtains component A；
(b) imidazolines polyethers, hexamethylenetetramine and solvent are mixed, reaction obtains B component；
(c) alkyl quaternary ammonium salts and solvent are mixed, obtains component C；
(2) mixing of component A, B component and component C
Component A, B component and component C are mixed, oil well inhibition composition is obtained.
9. a kind of Inhibitor For Oil Well System, which is characterized in that the Inhibitor For Oil Well System includes oil well inhibition group described in claim 1
Close object and solvent.
10. Inhibitor For Oil Well System according to claim 9, which is characterized in that the oil well inhibition composition is slow in oil well
Losing the weight percentage in agent is 1%~10%.
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