CN107459984B - Hydrogen sulfide corrosion inhibitor used in heavy oil thermal recovery and preparation method thereof - Google Patents
Hydrogen sulfide corrosion inhibitor used in heavy oil thermal recovery and preparation method thereof Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 97
- 230000007797 corrosion Effects 0.000 title claims abstract description 96
- 239000003112 inhibitor Substances 0.000 title claims abstract description 64
- 238000011084 recovery Methods 0.000 title claims abstract description 33
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000000295 fuel oil Substances 0.000 title claims abstract description 26
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 24
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 20
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 19
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 19
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000008117 stearic acid Substances 0.000 claims abstract description 19
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 17
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims abstract description 15
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 8
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- 239000008096 xylene Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims abstract description 7
- 239000004094 surface-active agent Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract 9
- 238000002156 mixing Methods 0.000 claims abstract 3
- 238000003756 stirring Methods 0.000 claims abstract 3
- 238000000034 method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- CZFQCZLKUBOZSS-UHFFFAOYSA-N 4,5-dihydro-1h-imidazole;octadecanoic acid Chemical compound C1CN=CN1.CCCCCCCCCCCCCCCCCC(O)=O CZFQCZLKUBOZSS-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims 4
- PDQAZBWRQCGBEV-UHFFFAOYSA-N Ethylenethiourea Chemical compound S=C1NCCN1 PDQAZBWRQCGBEV-UHFFFAOYSA-N 0.000 claims 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims 2
- 230000005764 inhibitory process Effects 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 12
- 239000008098 formaldehyde solution Substances 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 3
- 238000009472 formulation Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 235000014113 dietary fatty acids Nutrition 0.000 abstract 1
- 229930195729 fatty acid Natural products 0.000 abstract 1
- 239000000194 fatty acid Substances 0.000 abstract 1
- 150000004665 fatty acids Chemical class 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 25
- 239000003129 oil well Substances 0.000 description 6
- 238000010793 Steam injection (oil industry) Methods 0.000 description 5
- 239000003814 drug Substances 0.000 description 5
- 229940079593 drug Drugs 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
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- 239000012530 fluid Substances 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- PMUIBVMKQVKHBE-UHFFFAOYSA-N [S].NC(N)=O Chemical compound [S].NC(N)=O PMUIBVMKQVKHBE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
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- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
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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
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Abstract
本发明涉及一种稠油热采中采用的硫化氢缓蚀剂及其制备方法，属于油田用化学药剂配方与技术领域。该缓蚀剂的各组分质量百分比为：硬脂酸15％‑30％，二乙撑三胺14％‑24％，硫脲5％‑15％，NPC‑9型表面活性剂1％‑6％，甲醛水溶液30％‑60％。制备方法：(1)将硬脂酸与二乙撑三胺加入到二甲苯溶剂中，加热至150‑160℃，并稳定2‑3h，再升温至190‑200℃反应3h，冷却后得到硬脂酸咪唑啉中间体；(2)将中间体、二乙撑三胺和硫脲加入二甲苯溶剂，将温度加热到100‑130℃，反应4‑5h，冷却得到氨基乙撑‑硫脲基咪唑啉；(3)将甲醛水溶液与NPC‑9型表面活性剂均匀搅拌，加入氨基乙撑‑硫脲基咪唑啉混合均匀，即得所需的缓蚀剂。本发明制备方法简单，产品耐温性高，与添加剂复配性好，吸附效果好，缓蚀效果好。The invention relates to a hydrogen sulfide corrosion inhibitor used in heavy oil thermal recovery and a preparation method thereof, and belongs to the field of chemical formulations and technical fields for oil fields. The mass percentage of each component of the corrosion inhibitor is: stearic acid 15%-30%, diethylenetriamine 14%-24%, thiourea 5%-15%, NPC-9 type surfactant 1%- 6%, formaldehyde solution 30%-60%. Preparation method: (1) adding stearic acid and diethylenetriamine into xylene solvent, heating to 150-160 ℃, and stabilizing for 2-3h, then heating up to 190-200 ℃ and reacting for 3h, cooling to obtain hard Fatty acid imidazoline intermediate; (2) adding the intermediate, diethylenetriamine and thiourea into xylene solvent, heating the temperature to 100-130°C, reacting for 4-5h, and cooling to obtain aminoethylene-thiourea group imidazoline; (3) uniformly stirring the formalin solution and the NPC-9 type surfactant, adding aminoethylene-thioureido imidazoline and mixing uniformly to obtain the desired corrosion inhibitor. The preparation method of the invention is simple, the product has high temperature resistance, good compoundability with additives, good adsorption effect and good corrosion inhibition effect.
Description
技术领域technical field
本发明涉及一种稠油热采中采用的硫化氢缓蚀剂及其制备方法，具体涉及缓蚀剂的制备方法，属于油田用化学药剂配方与技术领域。The invention relates to a hydrogen sulfide corrosion inhibitor used in heavy oil thermal recovery and a preparation method thereof, in particular to a preparation method of the corrosion inhibitor, and belongs to the field of chemical formulations and technical fields for oil fields.
背景技术Background technique
硫化氢是一种剧毒气体，对人体危害严重。生产实践表明，金属在酸性介质中的腐蚀率比其它介质中的腐蚀率要高出很多，随着石油天然气开发程度的加深，特别是稠油热采中，由于蒸汽的注入为原油与地层水和岩石矿物进行复杂的化学反应提供了高温高压的有利条件，使得注汽井开采时产生更多的硫化氢和二氧化碳，这些油井的油管和套管的腐蚀比较严重，而石油天然气在开采运输时面临着越来越多的设备管线腐烛的问题，所以研究酸性介质中抑制金属腐烛的缓蚀方法是一项非常重要的课题。Hydrogen sulfide is a highly toxic gas, which is very harmful to human body. Production practice shows that the corrosion rate of metals in acid media is much higher than that in other media. The complex chemical reaction with rock minerals provides favorable conditions for high temperature and high pressure, so that more hydrogen sulfide and carbon dioxide are produced when steam injection wells are exploited. Faced with more and more problems of candle corrosion in equipment pipelines, it is a very important subject to study the corrosion inhibition method of inhibiting metal candle corrosion in acidic medium.
目前，控制腐蚀的技术主要有：研制耐腐蚀的材料，加注缓蚀剂，在现有设备内壁涂防腐层。大量文献资料证明，缓蚀剂是最为经济而方便有效的方法。而缓蚀剂的研究和应用也比较多，但是对注汽热采的油井适应性强的缓蚀剂还不多。因为注蒸汽和蒸汽品质要求的缘故，采出液的温度普遍较高，硫化氢及二氧化碳的浓度也较高，这就要求缓蚀剂要具有耐高温的特性，缓蚀效果更好。At present, the corrosion control technologies mainly include: developing corrosion-resistant materials, adding corrosion inhibitors, and coating the inner walls of existing equipment with anti-corrosion layers. A large number of literatures have proved that corrosion inhibitor is the most economical, convenient and effective method. The research and application of corrosion inhibitors are also more, but there are not many corrosion inhibitors with strong adaptability to steam injection thermal recovery oil wells. Due to the steam injection and steam quality requirements, the temperature of the produced fluid is generally high, and the concentration of hydrogen sulfide and carbon dioxide is also high, which requires the corrosion inhibitor to have high temperature resistance and better corrosion inhibition effect.
发明内容SUMMARY OF THE INVENTION
本发明为解决公知技术中存在的技术问题而提出一种稠油热采中采用的硫化氢缓蚀剂及其制备方法。In order to solve the technical problems existing in the known technology, the present invention proposes a hydrogen sulfide corrosion inhibitor used in heavy oil thermal recovery and a preparation method thereof.
本发明提供一种适用于稠油热采中氨基乙撑-硫脲基咪唑啉复合型缓蚀剂，以有效降低注蒸汽热采类技术开采过程中对油井和设备的腐蚀。The invention provides an aminoethylene-thiourea-based imidazoline composite corrosion inhibitor suitable for heavy oil thermal recovery, so as to effectively reduce the corrosion of oil wells and equipment in the recovery process of steam injection thermal recovery technology.
本发明的目的是提供一种具有制备方法简单，材料易得，对地层污染性小，与其他油井添加剂复配性好，耐高温，缓蚀效果好等特点的稠油热采中采用的硫化氢缓蚀剂。The purpose of the present invention is to provide a kind of sulfide oil used in thermal recovery of heavy oil, which has the characteristics of simple preparation method, easily available materials, little pollution to the formation, good compoundability with other oil well additives, high temperature resistance, and good corrosion inhibition effect. Hydrogen corrosion inhibitor.
本发明稠油热采中采用的硫化氢缓蚀剂所采取的技术方案是：The technical scheme adopted by the hydrogen sulfide corrosion inhibitor adopted in the thermal recovery of heavy oil of the present invention is:
一种稠油热采中采用的硫化氢缓蚀剂及其制备方法，其特征在于：缓蚀剂包含组分的种类和质量百分比为，硬脂酸15％-30％，二乙撑三胺14％-24％，硫脲5％-15％，NPC-9型表面活性剂1％-6％，甲醛水溶液30％-60％。A hydrogen sulfide corrosion inhibitor used in thermal recovery of heavy oil and a preparation method thereof, characterized in that the corrosion inhibitor comprises the types and mass percentages of components as follows: 15%-30% of stearic acid, diethylenetriamine 14%-24%, thiourea 5%-15%, NPC-9 type surfactant 1%-6%, formaldehyde solution 30%-60%.
本发明稠油热采中采用的硫化氢缓蚀剂的制备方法所采取的技术方案是：The technical scheme adopted by the preparation method of the hydrogen sulfide corrosion inhibitor adopted in the thermal recovery of heavy oil of the present invention is:
一种稠油热采中采用的硫化氢缓蚀剂的制备方法，其特征在于：稠油热采中采用的硫化氢缓蚀剂的制备过程如下：A preparation method of hydrogen sulfide corrosion inhibitor adopted in heavy oil thermal recovery, characterized in that: the preparation process of the hydrogen sulfide corrosion inhibitor adopted in heavy oil thermal recovery is as follows:
1)制备硬脂酸咪唑啉中间体1) Preparation of stearic acid imidazoline intermediate
将硬脂酸与二乙撑三胺加入到二甲苯溶剂中，加热至150-160℃，并稳定2-3h，再升温至190-200℃反应3h，冷却后得到硬脂酸咪唑啉中间体；Add stearic acid and diethylenetriamine into xylene solvent, heat to 150-160°C, and stabilize for 2-3h, then heat up to 190-200°C for 3h reaction, and obtain imidazoline stearate intermediate after cooling ;
(2)制备氨基乙撑-硫脲基咪唑啉(2) Preparation of aminoethylene-thioureido imidazoline
将硬脂酸咪唑啉中间体、二乙撑三胺和硫脲加入二甲苯溶剂，将温度加热到100-130℃，反应4-5h，冷却得到氨基乙撑-硫脲基咪唑啉；Add the stearic acid imidazoline intermediate, diethylenetriamine and thiourea into xylene solvent, heat the temperature to 100-130°C, react for 4-5h, and cool to obtain aminoethylene-thioureido imidazoline;
(3)制配出稠油热采中采用的硫化氢缓蚀剂(3) Preparation of hydrogen sulfide corrosion inhibitor used in heavy oil thermal recovery
将甲醛水溶液与NPC-9型表面活性剂均匀搅拌，加入氨基乙撑-硫脲基咪唑啉混合均匀，静置一段时间后，即得所需要的缓蚀剂。The formaldehyde solution and the NPC-9 type surfactant are uniformly stirred, and the aminoethylene-thioureido imidazoline is added to mix uniformly, and after standing for a period of time, the required corrosion inhibitor is obtained.
本发明稠油热采中采用的硫化氢缓蚀剂的制备方法还可以采取的如下技术方案：The following technical solutions that the preparation method of the hydrogen sulfide corrosion inhibitor adopted in the thermal recovery of heavy oil of the present invention can also be adopted:
所述的稠油热采中采用的硫化氢缓蚀剂的制备方法，其特征在于：过程(1)中硬脂酸与二乙撑三胺的摩尔比为1：1.3，过程(2)中硬脂酸咪唑啉中间体、二乙撑三胺和硫脲的摩尔比为1:1:1，甲醛水溶液中甲醛质量分数为30％。The preparation method of the hydrogen sulfide corrosion inhibitor adopted in the described heavy oil thermal recovery is characterized in that: in process (1), the mol ratio of stearic acid and diethylenetriamine is 1:1.3, and in process (2) The molar ratio of the stearic acid imidazoline intermediate, diethylenetriamine and thiourea is 1:1:1, and the mass fraction of formaldehyde in the formaldehyde solution is 30%.
本发明稠油热采中采用的硫化氢缓蚀剂的制备方法还可以采取的如下技术方案：The following technical solutions that the preparation method of the hydrogen sulfide corrosion inhibitor adopted in the thermal recovery of heavy oil of the present invention can also be adopted:
所述的稠油热采中采用的硫化氢缓蚀剂的制备方法，其特征在于：制备过程(1)和(2)，整个过程通入氮气保护硬脂酸、二乙撑三胺和硫脲在高温下不被氧气氧化，同时也能将反应中的水带走。The preparation method of the hydrogen sulfide corrosion inhibitor adopted in the thermal recovery of heavy oil is characterized in that: preparation process (1) and (2), the whole process is fed with nitrogen to protect stearic acid, diethylenetriamine and sulfur Urea is not oxidized by oxygen at high temperature, and it can also take away the water in the reaction.
本发明具有的优点和积极效果是：The advantages and positive effects that the present invention has are:
稠油热采中采用的硫化氢缓蚀剂及其制备方法由于采用了本发明全新的技术方案，与现有技术相比，本发明可应用于注蒸汽油井采出液中硫化氢对油井设备的腐蚀，可以将缓蚀剂耐温提高至160—200℃，可以与其他添加剂很好地复配，并使缓蚀效率高达94.515％—97.05％。The hydrogen sulfide corrosion inhibitor used in the thermal recovery of heavy oil and its preparation method adopt the new technical scheme of the present invention, and compared with the prior art, the present invention can be applied to the effect of hydrogen sulfide in the production fluid of steam injection oil well on oil well equipment It can increase the temperature resistance of the corrosion inhibitor to 160-200 ℃, can be well compounded with other additives, and make the corrosion inhibition efficiency as high as 94.515%-97.05%.
具体实施方式Detailed ways
为能进一步了解本发明的发明内容、特点及功效，列举以下实施例并详细说明如下：In order to further understand the content of the invention, features and effects of the present invention, the following examples are listed and described in detail as follows:
实施例1Example 1
一种稠油热采中采用的硫化氢缓蚀剂的配方如下(质量百分比)：The formula of the hydrogen sulfide corrosion inhibitor used in the thermal recovery of heavy oil is as follows (mass percentage):
根据“SY/T 5673--2000油田采出水用缓蚀剂性能评价方法”，在高压釜内试片转速为200r/min，挂片时间为72h，环境温度设置为160℃，缓蚀剂加药浓度为60mg/L。挂片实验结束后，试片经酸洗、干燥后称重，由前后试片质量变化计算缓蚀剂的缓蚀效率。According to "SY/T 5673--2000 Performance Evaluation Method of Corrosion Inhibitors for Oilfield Produced Water", the test piece speed in the autoclave is 200r/min, the time for hanging the piece is 72h, the ambient temperature is set to 160℃, the corrosion inhibitor is added The drug concentration is 60mg/L. After the hanging test, the test piece was pickled, dried and weighed, and the corrosion inhibition efficiency of the corrosion inhibitor was calculated from the mass change of the test piece before and after.
表1试片缓蚀效果对比Table 1 Comparison of corrosion inhibition effects of test pieces
实施例2Example 2
一种稠油热采中采用的硫化氢缓蚀剂的配方如下(质量百分比)：The formula of the hydrogen sulfide corrosion inhibitor used in the thermal recovery of heavy oil is as follows (mass percentage):
根据“SY/T 5673--2000油田采出水用缓蚀剂性能评价方法”，在高压釜内试片转速为200r/min，挂片时间为72h，环境温度设置为160℃，缓蚀剂加药浓度为60mg/L。挂片实验结束后，试片经酸洗、干燥后称重，由前后试片质量变化计算缓蚀剂的缓蚀效率。According to "SY/T 5673--2000 Performance Evaluation Method of Corrosion Inhibitors for Oilfield Produced Water", the test piece speed in the autoclave is 200r/min, the time for hanging the piece is 72h, the ambient temperature is set to 160℃, the corrosion inhibitor is added The drug concentration is 60mg/L. After the hanging test, the test piece was pickled, dried and weighed, and the corrosion inhibition efficiency of the corrosion inhibitor was calculated from the mass change of the test piece before and after.
表2试片缓蚀效果对比Table 2 Comparison of corrosion inhibition effects of test pieces
实施例3Example 3
一种稠油热采中采用的硫化氢缓蚀剂的配方如下(质量百分比)：The formula of the hydrogen sulfide corrosion inhibitor used in the thermal recovery of heavy oil is as follows (mass percentage):
根据“SY/T 5673--2000油田采出水用缓蚀剂性能评价方法”，在高压釜内试片转速为200r/min，挂片时间为72h，环境温度设置为160℃，缓蚀剂加药浓度为60mg/L。挂片实验结束后，试片经酸洗、干燥后称重，由前后试片质量变化计算缓蚀剂的缓蚀效率。According to "SY/T 5673--2000 Performance Evaluation Method of Corrosion Inhibitors for Oilfield Produced Water", the test piece speed in the autoclave is 200r/min, the time for hanging the piece is 72h, the ambient temperature is set to 160℃, the corrosion inhibitor is added The drug concentration is 60mg/L. After the hanging test, the test piece was pickled, dried and weighed, and the corrosion inhibition efficiency of the corrosion inhibitor was calculated from the mass change of the test piece before and after.
表3试片缓蚀效果对比Table 3 Comparison of corrosion inhibition effects of test pieces
实施例4Example 4
一种稠油热采中采用的硫化氢缓蚀剂的配方如下(质量百分比)：The formula of the hydrogen sulfide corrosion inhibitor used in the thermal recovery of heavy oil is as follows (mass percentage):
根据“SY/T 5673--2000油田采出水用缓蚀剂性能评价方法”，在高压釜内试片转速为200r/min，挂片时间为72h，环境温度设置为160℃，缓蚀剂加药浓度为60mg/L。挂片实验结束后，试片经酸洗、干燥后称重，由前后试片质量变化计算缓蚀剂的缓蚀效率。According to "SY/T 5673--2000 Performance Evaluation Method of Corrosion Inhibitors for Oilfield Produced Water", the test piece speed in the autoclave is 200r/min, the time for hanging the piece is 72h, the ambient temperature is set to 160℃, the corrosion inhibitor is added The drug concentration is 60mg/L. After the hanging test, the test piece was pickled, dried and weighed, and the corrosion inhibition efficiency of the corrosion inhibitor was calculated from the mass change of the test piece before and after.
表4试片缓蚀效果对比Table 4 Comparison of corrosion inhibition effects of test pieces
实施例5Example 5
一种稠油热采中采用的硫化氢缓蚀剂的配方如下(质量百分比)：The formula of the hydrogen sulfide corrosion inhibitor used in the thermal recovery of heavy oil is as follows (mass percentage):
根据“SY/T 5673--2000油田采出水用缓蚀剂性能评价方法”，在高压釜内试片转速为200r/min，挂片时间为72h，环境温度设置为200℃，缓蚀剂加药浓度为60mg/L。挂片实验结束后，试片经酸洗、干燥后称重，由前后试片质量变化计算缓蚀剂的缓蚀效率。According to "SY/T 5673--2000 Performance Evaluation Method of Corrosion Inhibitor for Oilfield Produced Water", the test piece rotating speed in the autoclave was 200r/min, the time of hanging the piece was 72h, the ambient temperature was set to 200℃, the corrosion inhibitor was added The drug concentration is 60mg/L. After the hanging test, the test piece was pickled, dried and weighed, and the corrosion inhibition efficiency of the corrosion inhibitor was calculated from the mass change of the test piece before and after.
表5试片缓蚀效果对比Table 5 Comparison of corrosion inhibition effects of test pieces
以上实施例具有所述的较好的耐温性，存在最佳的制备比，有较好的缓蚀效果，可以考虑应用到稠油热采中保护油井设备。The above examples have the described good temperature resistance, have the best preparation ratio, and have good corrosion inhibition effect, and can be considered to be applied to the protection of oil well equipment in heavy oil thermal recovery.
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