CN105132919A - Corrosion inhibitor for inhibiting CO2 corrosion in oil and gas fields and preparation method thereof - Google Patents
Corrosion inhibitor for inhibiting CO2 corrosion in oil and gas fields and preparation method thereof Download PDFInfo
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- CN105132919A CN105132919A CN201510592930.5A CN201510592930A CN105132919A CN 105132919 A CN105132919 A CN 105132919A CN 201510592930 A CN201510592930 A CN 201510592930A CN 105132919 A CN105132919 A CN 105132919A
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Abstract
The invention relates to a corrosion inhibitor for inhibiting CO2 corrosion in oil and gas fields. The corrosion inhibitor comprises the following main components according to the weight percentage: 40-60% of solvent, 25-30% of modified imidazoline quaternary ammonium salt, 10- 15% of alcohol amine and 5-10% of surface active agent. The corrosion inhibitor is easily soluble in water, relatively high in corrosion inhibition efficiency at low concentration, can substantially save cost and can be used for inhibiting the corrosion of shafts and pipelines, which is caused by CO2 at high temperature and high pressures of gas fields.
Description
Technical field
The present invention relates to chemical field, being specifically related to one efficiently can suppress CO targetedly
2corrosion, for raising gas field development economic benefit, extends the gas production life-span, is applied to High Temperature High Pressure deep natural gas well and suppresses CO
2inhibiter of corrosion and preparation method thereof.
Background technology
CO
2corrosion is main based on galvanic corrosion, and the erosion rate caused by it is higher than the strong acid of same concentrations.From material appearance, show as local corrosion or body perforation, break, to metallic substance, there is huge destruction, can make pipeline and equipment that early stage corrosion failure occurs and cause perforation or fracture, cause the life-span of gas well to be significantly less than life.
Control CO
2the technology of corrosion mainly contains three classes: select corrosion-resistant material, filling inhibiter, inside coating or lining.Inhibiter of wherein annotating is economic and reliable, widely used process for corrosion control.Suppress CO
2what in the type of inhibitor of corrosion, research application was more is acid amides, tetrahydroglyoxaline and quaternary ammonium salt.Imidazoline and its derivative has unique molecular structure, to H
2s, CO
2corrosion has good restraining effect, contains the imidazolidine derivatives of amino and sulfenyl for suppression CO
2corrosive effect is very remarkable.Due to difference and the complicacy of applied environment, for specific environment screening composite go out high-efficient corrosion inhibitor with strong points be current inhibiter research focus.Therefore, be necessary to develop a kind of for gas field, Shenmu County can high temperature high voltage resistant effectively can suppress CO
2the gas well inhibiter of corrosion.
Heydari
[1]deng and OKafor
[2]deng result of study show, aminooimidazole quinoline and lauric acid imidazoline are at saturated CO
23%NaCl solution in have good corrosion inhibition to carbon steel, be further enhanced with the composite rear inhibition efficiency of iodide ion.Long Biao etc.
[3]with oil base hydroxyethyl imidazole quinoline for host, by it and thiocarbamide, isopropylcarbinol, emulsifying agent and water are composite obtains a kind of inhibiter suppressing CO2 to corrode, when adding this inhibiter of 200mg/L, under room temperature or high temperature, static corrosion inhibition rate is more than 94%, this technology by composite for thiocarbamide enter slow-releasing agent system, thiocarbamide is at high temperature unstable easily to be decomposed, and this technology medicament usage quantity is larger; Li Yangchi
[4]deng with cycloalkyl tetrahydroglyoxaline for host, be equipped with the nonionogenic tenside such as alkynol, Soxylat A 25-7 and solvent, compound obtains a kind of corrosion inhibitor for liquid and gas phase, in the simulated field corrosive environment of 90 DEG C, when adding 200mg/L inhibiter, be greater than 90% to the vapor phase corrosion inhibitor rate of N80 carbon steel, aqueous etching speed is 0.062mm/a, this technology is applicable to vapor phase corrosion inhibitor, liquid phase corrosion inhibition rate limited efficiency.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of soluble in water, under lower concentration, inhibition efficiency is higher, can be significantly cost-saving, and inhibiter can be used for CO under the High Temperature High Pressure of gas field
2the oil-gas field of the pit shaft caused, corrosive pipeline suppresses CO
2inhibiter of corrosion and preparation method thereof.
In order to achieve the above object, the technical scheme that the present invention takes is: a kind of oil-gas field suppresses the inhibiter of CO2 corrosion, and the weight percent primarily of following component and each component is: solvent 40 ~ 60%; Modified imidazole hyamine 25 ~ 30%; Hydramine 10 ~ 15%; Tensio-active agent 5 ~ 10%;
Described solvent is soluble in water, the solvent of boiling point more than 50 DEG C.
Described solvent is one or several in water, ethanol, methyl alcohol, Virahol.
Described tensio-active agent is cats product, long-chain amine or nonionogenic tenside.
Described tensio-active agent is one or several in OP-10, tween-80, Tween-60, amine surfactants.
Described modified imidazole hyamine carries out quaterisation with oleic imidazolinone salt and Benzyl Chloride at 130-140 DEG C, the quaternary ammonium salt obtained reacts at 90-110 DEG C with thiocarbamide further, N, S atom is introduced in molecule, reaction intermediate continues and benzoic acid, and in the amino on intermediate and phenylformic acid, carboxyl reaction obtains target compound modified imidazole hyamine.
Oil-gas field suppresses a preparation method for the inhibiter of CO2 corrosion, comprises the following steps: first add in reactor by solvent, modified imidazole hyamine, hydramine, stir; Be heated to 40 ~ 50 DEG C to being uniformly dissolved, constant temperature 1 ~ 2 hours stops heating; Add tensio-active agent after cooling, stir, obtain product.
The present invention adopts above technical scheme, have the following advantages, the present invention is based on oleic imidazolinone salt, carry out quaternary ammoniated to it, improve water-soluble, introduce the material such as phenylformic acid, thiocarbamide first with in molecular configurational, in the imidazoline salt molecule after quaternary ammoniated, introduce the heteroatomss such as N, O, S, increase the binding site with metal, promote its absorption property; Component all has resistant to elevated temperatures characteristic simultaneously, stablize more than 180 DEG C and do not decompose and keep good corrosion inhibition, appropriate hydramine, tensio-active agent and solvent is added in formula, each component acts synergistically mutually, the inhibition efficiency of inhibiter of the present invention under lower working concentration is all higher than 80%, oil-gas field onsite application can be met, appropriate preferred surfactant is added in the formula based on quaternary ammonium salt, make it in different media, all have good solubility energy, the actual environment being applied to gas well preferably.Inhibiter consumption of the present invention is little, according to its dosage of gas well Calculation of Water producing capacity usually at 100mg/L ~ 500mg/L, also can carry out corresponding adjustment according to on-the-spot corrosion monitoring situation.Raw material needed for production is conventional industrial chemicals, and synthesis technique is simple, constant product quality.The inhibiter that the present invention produces, can form the effective protective membrane of one deck at metallic conduit and equipment surface, is applicable to CO under high-temperature and high-pressure conditions
2the corrosive pipeline caused, compatibleness is good, is the desirable inhibiter of Oil and gas field.
Accompanying drawing explanation
Fig. 1: be station, Shenmu County 1 lacing film erosion profile;
Fig. 2: be station, Shenmu County 2 lacing film erosion profile;
Fig. 3: be 50mg/L inhibiter lacing film erosion profile;
Fig. 4: be 100mg/L inhibiter lacing film erosion profile.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
First by solvent 40 ~ 60%; Modified imidazole hyamine 25 ~ 30%; Hydramine 10 ~ 15%; Adding in reactor, being stirred and heated to 40 ~ 50 DEG C to being uniformly dissolved, constant temperature 1 ~ 2 hour, add tensio-active agent 5 ~ 10% solvent after cooling, obtain product.
Embodiment 1
By 200 grams of solvents, 40 grams of imidazoline quaternary ammonium salt derivatives, 5 grams of alcohol amine mixt, 5 grams of OP-10 tensio-active agents, stir, make sample.Carry out salinity be 50000mg/L, 10000 static corrosion test, the results are shown in table 1.
Embodiment 2
By 200 grams of solvents, 35 grams of imidazoline quaternary ammonium salt derivatives, 7.5 grams of alcohol amine mixt, 7.5 grams of OP-10 tensio-active agents, stir, make sample.Carry out the static corrosion test that salinity is 50000mg/L, 10000mg/L, the results are shown in table 1.
Embodiment 3
By 200 grams of solvents, 40 grams of imidazoline quaternary ammonium salt derivatives, 5 grams of alcohol amine mixt, 5 grams of amine surfactants, stir, make sample 3.Carry out the static corrosion test that salinity is 50000mg/L, 10000mg/L, the results are shown in table 1.
Implement 4
By 200 grams of solvents, 35 grams of imidazoline quaternary ammonium salt derivatives, 7.5 grams of alcohol amine mixt, 7.5 grams of amine surfactants, stir, make sample.Carry out the static corrosion test that salinity is 50000mg/L, 10000mg/L, the results are shown in table 1.
Comparative result (dosage 50mg/L) under table 1 variant proportioning inhibiter and different salinity
Note: test under 80 DEG C of saturated carbon dioxide conditions, leaves standstill result measured by 72h in Simulated Water
Embodiment 5
By 200 grams of solvents, 40 grams of imidazoline quaternary ammonium salt derivatives, 7.5 grams of alcohol amine mixt, 7.5 grams of amine surfactants, stir, make sample.Carry out station, Shenmu County 1 gas well production water and the test of station, Shenmu County 2 gas well production water static corrosion, the results are shown in table 2.
For station, Shenmu County 1 and refreshing 2 gas field, station water samples, adopt the imidazoline inhibitor of development to do static corrosion test, test under 80 DEG C of saturated carbon dioxide conditions, leave standstill result measured by 72h in recovered water at the scene, be listed in the table below 2
Table 2 god 1 and refreshing 2 station water sample inhibiter evaluate (dosage 100mg/L)
Be station, Shenmu County 1 as shown in Figure 1,2,3, 4,2 station lacing film corrosion conditions, have carried out scanning electron microscope experiment to steel disc, have observed the configuration of surface of steel disc.
In above-described embodiment 1-5, described modified imidazole hyamine carries out quaterisation with oleic imidazolinone salt and Benzyl Chloride at 130-140 DEG C, the quaternary ammonium salt obtained reacts at 90-110 DEG C with thiocarbamide further, the heteroatomss such as N, S are introduced in molecule, reaction intermediate continues and benzoic acid, in amino on intermediate and phenylformic acid, carboxyl reaction obtains target compound, and the binding site in this compound molecule increases, and can promote its absorption property.
Described solvent is one or several in water, ethanol, methyl alcohol, Virahol.
Described tensio-active agent is one or several in OP-10, tween-80, Tween-60, amine surfactants.
As long as the solvent in the present invention soluble in water, the solvent of boiling point more than 50 DEG C; As long as described tensio-active agent cats product, long-chain amine or nonionogenic tenside.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (7)
1. an oil-gas field is with suppressing CO
2the inhibiter of corrosion, it is characterized in that, the weight percent primarily of following component and each component is: solvent 40 ~ 60%; Modified imidazole hyamine 25 ~ 30%; Hydramine 10 ~ 15%; Tensio-active agent 5 ~ 10%.
2. oil-gas field use suppresses CO as claimed in claim 1
2the inhibiter of corrosion, is characterized in that: described solvent is soluble in water, the solvent of boiling point more than 50 DEG C.
3. oil-gas field use suppresses CO as claimed in claim 1 or 2
2the inhibiter of corrosion, is characterized in that: described solvent is one or several in water, ethanol, methyl alcohol, Virahol.
4. oil-gas field use suppresses CO as claimed in claim 1
2the inhibiter of corrosion, is characterized in that: described tensio-active agent is cats product, long-chain amine or nonionogenic tenside.
5. the oil-gas field inhibiter suppressing CO corrosion as described in claim 1 or 4, is characterized in that: described tensio-active agent is one or several in OP-10, tween-80, Tween-60, amine surfactants.
6. oil-gas field use suppresses the inhibiter of CO2 corrosion as claimed in claim 1, it is characterized in that: described modified imidazole hyamine carries out quaterisation with oleic imidazolinone salt and Benzyl Chloride at 130-140 DEG C, the quaternary ammonium salt obtained reacts at 90-110 DEG C with thiocarbamide further, N, S atom is introduced in molecule, reaction intermediate continues and benzoic acid, and in the amino on intermediate and phenylformic acid, carboxyl reaction obtains target compound modified imidazole hyamine.
7. an oil-gas field preparation method for the inhibiter suppressing CO2 to corrode, is characterized in that, comprise the following steps: first add in reactor by solvent, modified imidazole hyamine, hydramine, stir; Be heated to 40 ~ 50 DEG C to being uniformly dissolved, constant temperature 1 ~ 2 hours stops heating; Add tensio-active agent after cooling, stir, obtain product.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617848A (en) * | 2015-12-29 | 2016-06-01 | 中国石油天然气股份有限公司 | In-situ-combustion producing-well associated gas treating agent and preparing method and application thereof |
| CN106757046A (en) * | 2016-12-29 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit and preparation method thereof |
| CN107699900A (en) * | 2017-08-18 | 2018-02-16 | 中国石油天然气股份有限公司 | A kind of oil gas field gathering line CO2Corrosion inhibiter and preparation method |
| CN108251848A (en) * | 2016-12-28 | 2018-07-06 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter and preparation method thereof |
| CN110344064A (en) * | 2019-08-27 | 2019-10-18 | 山东益丰生化环保股份有限公司 | A kind of neutralization corrosion inhibiter |
| CN110564395A (en) * | 2019-09-30 | 2019-12-13 | 新疆准东准盈技术有限责任公司 | preparation method of blocking remover for oil extraction |
| CN112778992A (en) * | 2020-01-16 | 2021-05-11 | 中海油(天津)油田化工有限公司 | Corrosion inhibitor for annular protection liquid and preparation method and application thereof |
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| CN104559983A (en) * | 2013-10-29 | 2015-04-29 | 中国石油化工股份有限公司 | Corrosion inhibitor composition, corrosion inhibitor, application of corrosion inhibitor and anti-corrosion method of metal component |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617848A (en) * | 2015-12-29 | 2016-06-01 | 中国石油天然气股份有限公司 | In-situ-combustion producing-well associated gas treating agent and preparing method and application thereof |
| CN108251848A (en) * | 2016-12-28 | 2018-07-06 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter and preparation method thereof |
| CN106757046A (en) * | 2016-12-29 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit and preparation method thereof |
| CN106757046B (en) * | 2016-12-29 | 2018-11-16 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter and preparation method thereof for sulfur-bearing moisture conveyance conduit |
| CN107699900A (en) * | 2017-08-18 | 2018-02-16 | 中国石油天然气股份有限公司 | A kind of oil gas field gathering line CO2Corrosion inhibiter and preparation method |
| CN107699900B (en) * | 2017-08-18 | 2020-07-14 | 中国石油天然气股份有限公司 | CO2 corrosion inhibitor for gathering and transportation pipelines of oil and gas fields and preparation method thereof |
| CN110344064A (en) * | 2019-08-27 | 2019-10-18 | 山东益丰生化环保股份有限公司 | A kind of neutralization corrosion inhibiter |
| CN110564395A (en) * | 2019-09-30 | 2019-12-13 | 新疆准东准盈技术有限责任公司 | preparation method of blocking remover for oil extraction |
| CN112778992A (en) * | 2020-01-16 | 2021-05-11 | 中海油(天津)油田化工有限公司 | Corrosion inhibitor for annular protection liquid and preparation method and application thereof |
| CN112778992B (en) * | 2020-01-16 | 2022-10-04 | 中海油(天津)油田化工有限公司 | Corrosion inhibitor for annular protection liquid and preparation method and application thereof |
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Application publication date: 20151209 |