CN110079807A - A kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature - Google Patents
A kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature Download PDFInfo
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- CN110079807A CN110079807A CN201910275385.5A CN201910275385A CN110079807A CN 110079807 A CN110079807 A CN 110079807A CN 201910275385 A CN201910275385 A CN 201910275385A CN 110079807 A CN110079807 A CN 110079807A
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- corrosion inhibiter
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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
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The oil field antiscale corrosion inhibiter and preparation method thereof that the invention discloses a kind of suitable for high temperature, the following steps are included: S1: nonionic imidazolines polyethers, octyl phenol polyoxyethylene ether OP-10, polyethylene polyamine, benzotriazole and water being mixed evenly, solution A is prepared as；S2: disodium ethylene diamine tetraacetate, 1-hydroxy ethylidene-1,1-diphosphonic acid, hexamethylenetetramine, dodecyl trimethyl ammonium chloride and water are mixed evenly, solution B is prepared as；S3: solution A and solution B are mixed evenly to get antiscale corrosion inhibiter is arrived.The present invention prevents oilfield produced fluid due to low in acidity, high salinity, CO by aforesaid operations step so that antiscale corrosion inhibiter of the invention is suitable for high temperature (70 DEG C) environment2And H2Corrode caused by S and high temperature, while having and prevent calcium carbonate or magnesium carbonate fouling performance.Corrosion inhibition rate is greater than 75% at 70 DEG C, and antiscaling rate is greater than 80%.
Description
Technical field
The present invention relates to Oilfield Chemicals technical field, specially a kind of oil field antiscale corrosion inhibiter suitable for high temperature and its
Preparation method.
Background technique
During oil extraction, due to characteristics such as the low in acidity of production fluid, high temperature and high salinities, usually to surface gathering and transferring
Pipeline and down-hole oil tube generate corrosion, some oil fields can also because of calcium ions and magnesium ions presence and fouling.For this purpose, relatively effective side
Method is that corrosion inhibiter is added to carry out corrosion control, and scale preventative (be called antisludging agent, below referred to as scale preventative) is added and carries out antiscale.It is thick
Oil vapour handle up thermal recovery when, gathering line from start open flow when 110-120 DEG C be gradually lowered to 40 DEG C or so, in the long period
It is in high temperature (70 DEG C or more) state in (according to production practice generally at 1-2 months or so), therefore to corrosion inhibiter and scale preventative
High temperature resistance propose requirements at the higher level.
Conventional corrosion inhibitor for oil field and scale preventative is using temperature generally at 50 DEG C or less.But under high temperature harsh environment, often
The corrosion inhibitor for oil field of rule and changing at branch for scale preventative, so that so that corrosion inhibiter and scale preventative is failed or is substantially reduced makes
Use effect.And corrosion inhibiter and scale preventative fill respectively will increase equipment and cost input, the compatibility of corrosion inhibiter and scale preventative
There is also uncertainties with compatibility.
Summary of the invention
The oil field antiscale corrosion inhibiter and preparation method thereof that the purpose of the present invention is to provide a kind of suitable for high temperature, so that this
The antiscale corrosion inhibiter of invention is suitable for high temperature (70 DEG C) environment, prevents low in acidity, high salinity, CO2And H2Corrode caused by S, together
When have prevent calcium carbonate or magnesium carbonate fouling performance.Corrosion inhibition rate is greater than 75% at 70 DEG C, and antiscaling rate is greater than 80%.
To achieve the above object, the invention provides the following technical scheme:
S1: by nonionic imidazolines polyethers, octyl phenol polyoxyethylene ether OP-10, polyethylene polyamine, benzotriazole and
Water is mixed evenly, and is prepared as solution A；
S2: by disodium ethylene diamine tetraacetate, 1-hydroxy ethylidene-1,1-diphosphonic acid, hexamethylenetetramine, trimethyl chlorination
Ammonium and water are mixed evenly, and are prepared as solution B；
S3: solution A and solution B are mixed evenly to get antiscale corrosion inhibiter is arrived.
Preferably, in the step S1 each raw material of solution A weight percent be nonionic imidazolines polyethers (5~
20%), octyl phenol polyoxyethylene ether OP-10 (10~30%), polyethylene polyamine (5~20%), benzotriazole (1~10%)
With water (20-80%).
Preferably, the weight percent of each raw material of solution B is disodium ethylene diamine tetraacetate (EDTA) in the step S2
(1~20%), 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP) (0~20%), hexamethylenetetramine (5~25%), trimethyl
Ammonium chloride (5~25%) and water (10~80%).
Preferably, the weight percent of solution A and solution B is solution A (25~50%) and solution B in the step S3
(50~80%).
Preferably, the solid in the step S1 and S2 all dissolves.
Preferably, described step S1, S2 and S3 are mixed at normal temperature.
Compared with prior art, beneficial effects of the present invention are as follows:
Antiscale corrosion inhibiter of the invention is suitable for high temperature (70 DEG C) environment, prevents low in acidity, high salinity, CO2And H2S and
Corrode caused by high temperature, while having and prevent calcium carbonate or magnesium carbonate fouling performance.Corrosion inhibition rate is greater than 75% at 70 DEG C, antiscale
Rate is greater than 80%.
Detailed description of the invention
Fig. 1 is step flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of oil field antiscale corrosion inhibiter and its system suitable for high temperature
Preparation Method, comprising the following steps:
S1: by nonionic imidazolines polyethers, octyl phenol polyoxyethylene ether OP-10, polyethylene polyamine, benzotriazole and
(solid all dissolves) is mixed evenly under water room temperature, is prepared as solution A, the weight percent of each raw material is nonionic miaow
Oxazolines polyethers (5~20%), octyl phenol polyoxyethylene ether OP-10 (10~30%), polyethylene polyamine (5~20%), benzo
Triazole (1~10%) and water (20-80%)；
S2: by disodium ethylene diamine tetraacetate, 1-hydroxy ethylidene-1,1-diphosphonic acid, hexamethylenetetramine, trimethyl chlorination
(solid all dissolves) is mixed evenly under ammonium and water room temperature, is prepared as solution B, the weight percent of each raw material is second two
Amine tetraacethyl disodium (EDTA) (1~20%), 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP) (0~20%), hexamethylenetetramine (5~
25%), dodecyl trimethyl ammonium chloride (5~25%) and water (10~80%)；
S3: it will be mixed evenly under solution A and solution B room temperature to get antiscale corrosion inhibiter, the weight of solution A and solution B is arrived
Amount percentage is solution A (25~50%) and solution B (50~80%).
Combined with specific embodiments below with Experimental comparison's example, the invention will be further described, but not as can to this case
The restriction of practical range:
Embodiment 1
S1: by nonionic imidazolines polyethers 160g, octyl phenol polyoxyethylene ether 180g, polyethylene polyamine 160g, benzo
(solid all dissolves) is mixed evenly under triazole 20g and water 300g room temperature, is prepared as solution A；
S2: by disodium ethylene diamine tetraacetate 100g, 1-hydroxy ethylidene-1,1-diphosphonic acid 50g, hexamethylenetetramine 150g, dodecyl
(solid all dissolves) is mixed evenly under trimethyl ammonium chloride 100g, water 200g room temperature, is prepared as solution B；
S3: it will be mixed evenly under solution A and solution B room temperature by 1:1 to get to antiscale corrosion inhibiter 1#.
Embodiment 2
S1: by nonionic imidazolines polyethers 50g, octyl phenol polyoxyethylene ether 120g, polyethylene polyamine 80g, benzo three
(solid all dissolves) is mixed evenly under nitrogen azoles 10g and water 200g room temperature, is prepared as solution A；
S2: by disodium ethylene diamine tetraacetate 120g, hexamethylenetetramine 120g, dodecyl trimethyl ammonium chloride 120g,
(solid all dissolves) is mixed evenly under water 250g room temperature, is prepared as solution B；
S3: it will be mixed evenly under solution A and solution B room temperature by 1:1 to get to antiscale corrosion inhibiter 2#.
Embodiment 3
S1: by nonionic imidazolines polyethers 50g, octyl phenol polyoxyethylene ether 120g, polyethylene polyamine 80g, benzo three
(solid all dissolves) is mixed evenly under nitrogen azoles 10g and water 200g room temperature, is prepared as solution A；
S2: by disodium ethylene diamine tetraacetate (EDTA) 120g, hexamethylenetetramine 120g, dodecyl trimethyl ammonium chloride
(solid all dissolves) is mixed evenly under 120g, water 250g room temperature, is prepared as solution B；
S3: it will be mixed evenly under solution A and solution B room temperature by 1:1.25 to get to antiscale corrosion inhibiter 3#.
Corrosion mitigating effect of the invention is referring to " the oil field produced water process corrosion inhibiter performance indicator of SYT 5273-2014 and commenting
Valence method " it is evaluated.In order to guarantee the accuracy of experimental result, test medium is directly from the wellhead sampling of producing well, experiment
Temperature is controlled at 70 DEG C.Experimental procedure is as follows:
1, scene links well mouth of oil well with sebific duct, by sebific duct other end insertion sample bucket bottom to prevent sampling process from exposing
Oxygen.Quantity of sampling quantity is in 20~25kg (representativeness that quantity cannot be guaranteed sample very little).The oil water mixture got indoors from
So sedimentation 4~8 hours (time, too short water-oil separating was not thorough, and the time, too long easy exposure oxygen influenced experimental result).
2, test piece (20# steel) is impregnated with 60~90 DEG C of petroleum ether and removes strip grease with absorbent cotton, then put
Enter and impregnates 5min in dehydrated alcohol, further degreasing and dehydration.It takes out test piece to be placed on filter paper, (no with the drying of hair dryer cold wind
Hot wind can be used, otherwise test piece can aoxidize), then wrapped with filter paper, it is placed in drier and places 1h weighing, be accurate to 0.1mg.
3,1#, 2#, 3# antiscale corrosion inhibiter that the embodiment of the present invention obtains are configured to 10% aqueous solution, with pipette or
Medical graded syringe (1ml) takes 1ml to be added in difference respectively.
4, added the experiment container (1000ml wide-mouth bottle) of antiscale corrosion inhibiter that air therein is discharged with nitrogen purging, simultaneously
The blank vessel for preparing that corrosion inhibiter is not added is for doing blank assay.
5, one end of emulsion tube is connected into a glass tube (bung height that the length of glass tube is slightly larger than sampler barrel), so
Glass tube is inserted into sampler barrel bottom afterwards, sampler barrel bottom water sample is directed into the purged experiment container of nitrogen.It imported
Journey will ensure glass tube and the latex seal of tube, avoid being mixed into air.
6, three test pieces are hung with nylon rope in each test bottle, test piece spacing is evenly arranged the test piece (generally in 3cm or so)
Upper end is away from liquid level 3cm or more.Test bottle stoppers sealing with rubber plug.
7, test bottle is put into insulating box, places 7d at 70 DEG C.
8, test piece is taken out, erosion profile is observed and recorded, rinsed immediately with clear water and is dried with filter paper, with 60~90 DEG C of stone
Oily ether impregnates and removes strip greasy dirt with absorbent cotton, is put into 10% hydrochloric acid containing 1% hexamethylenetetramine and impregnates 5min,
The corrosion product of strip is gently tried with absorbent cotton simultaneously.It takes out test piece and rinses the residual acid of strip with clear water, be then placed in nothing
It is dehydrated in water-ethanol, takes out test piece and be placed on filter paper, dried up with hair dryer cold wind, then wrapped with filter paper, be placed in drier and put
1h weighing is set, 0.1mg is accurate to.
9, uniform corrosion inhibition rate is calculated as follows:
η=(△ m0- △ m1)/△ m0 × 100%
In formula:
η --- corrosion inhibition rate is expressed as a percentage；
The average quality of △ m0 --- test piece in blank assay loses (g)；
△ m1 --- the average quality of test piece loses (g) in dosing experiment.
Antiscaling effect of the invention evaluation method is as follows: will calcium chloride solution and sodium bicarbonate solution mix after be likely to form
Precipitation of calcium carbonate causes incrustation ion concentration in water to be remarkably decreased.If containing scale preventative in mixed liquor, precipitating is difficult to shape
At the reduction of the original concentration of scaling cations is also suppressed.Change scale preventative type and dosage in mixed liquor, guarantees shape
The time required at precipitating, by measuring the concentration variation at dirty calcium ion, i.e., evaluation is made to the anti-scaling property of scale preventative.
By the above method, 3 mouthfuls of oil well produced liquids in Karamay, Xinjiang oil field are respectively adopted to the embodiment of the present invention
Three kinds of obtained antiscale corrosion inhibiter are evaluated, to the corrosion inhibition rates of 3 mouthfuls of oil well produced liquids substantially 75% or more, to calcium carbonate
For the antiscaling rate of dirt 80% or more, antiscale corrosion inhibiter Experimental comparison's table is as follows:
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature, it is characterised in that: the following steps are included:
S1: nonionic imidazolines polyethers, octyl phenol polyoxyethylene ether OP-10, polyethylene polyamine, benzotriazole and water are mixed
Conjunction stirs evenly, and is prepared as solution A；
S2: by disodium ethylene diamine tetraacetate, 1-hydroxy ethylidene-1,1-diphosphonic acid, hexamethylenetetramine, dodecyl trimethyl ammonium chloride and
Water is mixed evenly, and is prepared as solution B；
S3: solution A and solution B are mixed evenly to get antiscale corrosion inhibiter is arrived.
2. a kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature according to claim 1, feature exists
In: the weight percent of each raw material of solution A is nonionic imidazolines polyethers (5~20%), octyl phenol in the step S1
Polyoxyethylene ether OP-10 (10~30%), polyethylene polyamine (5~20%), benzotriazole (1~10%) and water (20-
80%).
3. a kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature according to claim 1, feature exists
In: the weight percent of each raw material of solution B is disodium ethylene diamine tetraacetate (EDTA) (1~20%), hydroxyl in the step S2
Base ethylene-diphosphonic acid (HEDP) (0~20%), hexamethylenetetramine (5~25%), dodecyl trimethyl ammonium chloride (5~
And water (10~80%) 25%).
4. a kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature according to claim 1, feature exists
In: the weight percent of solution A and solution B is solution A (25~50%) and solution B (50~80%) in the step S3.
5. a kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature according to claim 1, feature exists
In: the solid in the step S1 and S2 all dissolves.
6. a kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature according to claim 1, feature exists
In: described step S1, S2 and S3 are mixed at normal temperature.
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| CN201910275385.5A CN110079807A (en) | 2019-04-08 | 2019-04-08 | A kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature |
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| CN201910275385.5A CN110079807A (en) | 2019-04-08 | 2019-04-08 | A kind of oil field antiscale corrosion inhibiter and preparation method thereof suitable for high temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219168A (en) * | 2020-01-16 | 2020-06-02 | 刘辉 | Solid corrosion-inhibiting antiscaling agent and its processing method |
| CN117051398A (en) * | 2023-08-21 | 2023-11-14 | 河北大沧石化科技有限公司 | Environment-friendly gas-liquid two-phase corrosion inhibitor |
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Cited By (3)
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|---|---|---|---|---|
| CN111219168A (en) * | 2020-01-16 | 2020-06-02 | 刘辉 | Solid corrosion-inhibiting antiscaling agent and its processing method |
| CN111219168B (en) * | 2020-01-16 | 2022-07-29 | 刘辉 | Solid corrosion-inhibiting antiscaling agent and its processing method |
| CN117051398A (en) * | 2023-08-21 | 2023-11-14 | 河北大沧石化科技有限公司 | Environment-friendly gas-liquid two-phase corrosion inhibitor |
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Application publication date: 20190802 |