CN102321464B - Corrosion and scale inhibitor for oil well in high water cut stage - Google Patents
Corrosion and scale inhibitor for oil well in high water cut stage Download PDFInfo
- Publication number
- CN102321464B CN102321464B CN 201110198619 CN201110198619A CN102321464B CN 102321464 B CN102321464 B CN 102321464B CN 201110198619 CN201110198619 CN 201110198619 CN 201110198619 A CN201110198619 A CN 201110198619A CN 102321464 B CN102321464 B CN 102321464B
- Authority
- CN
- China
- Prior art keywords
- corrosion
- oil well
- weight
- corrosion inhibiting
- descaling agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention relates to a corrosion and scale inhibitor for an oil well in a high water cut stage, which is applicable to corrosion and scale inhibition of an oilfield. The corrosion and scale inhibitor comprises the following components in percentage by weight: 3.25-4.0% of o-dimethyl thiourea, 12.5-13.5% of ethylenediamine tetramethylene phosphonate, 8.0-8.5% of dodecyl butylamine methyl sulfide, 3.0-3.25% of tetradecyl tributyl phosphonium chloride, 15.0-16.2% of DN-3212 acrylic acid, organic phosphine and sulfonic acid copolymer, 5.25-5.75% of M-505A corrosion inhibitor, 6.85-7.25% of SL-2 corrosion and scale inhibitor, 5.0-7.5% of methanol, 3.4-3.75% of methenamine, 0.05-0.055% of vitamin A and the balance of water, wherein the sum of the weight percentage of each component is100%. The corrosion and scale inhibitor has the effects that: when the addition amount of the corrosion and scale inhibitor is 50-60 mg/L, the corrosion inhibition rate of the oil well reaches more than 85%, and the scale inhibition rate reaches more than 90%; and the average pump examination period is prolonged by more than one time.
Description
Technical field
The present invention relates to the oil extraction in oil field technical field, particularly a kind of for high water-cut stage oil well corrosion inhibiting and descaling agent.
Background technology
The oil field enters high water-cut stage, and because salinity in the water is high, serious corrosion and scaling phenomenon appears in oil well.Although the technician has taked various control measures, the method difference of taking because of the practical situation in oil field is very large.
Zhang Lianming etc. are published in the development of the oil well corrosion inhibiting and descaling agent on the 6th phase of the calendar year 2001 oil field gas field face engineering and point out that with using a literary composition formation water salinity is high in the some oil wells output medium of Zhongyuan Oil Field, Ca
2+, Mg
2+, SO
4 2-, HCO
3 -, SO
2And SRB content is high, and the pH value is low, and this output medium has very high corrosion and fouling tendency.Oil well adds unidirectional inhibiter and Scale inhibitors simultaneously, not only increase production cost but also increase workload, and must solve the compatibility problems of Scale inhibitors and inhibiter, therefore, for influence factors such as oil well corrosion and scalings, it is significant to study the corrosion inhibiting and descaling agent with inhibition and scale-inhibiting properties.
Wang Rui is published in the oil field produced well scale inhibition anticorrosion of waist English platform Technology one literary composition on the 7th phase oil field gas field face engineering in 2010 and according to waist English platform oilfield reservoir characteristics, fouling feature oil well fouling mechanism and influence factor is analyzed, and works out corresponding clear, scale inhibitor Technology.7 mouthfuls of wells of this technology test in place, average pump detection period is 2 months before the test, take scale inhibition technique after the average inspection pump phase of being excused from a college course reached 8 months, antiscaling effect is remarkable.
Liang Tao has discussed China's onshore oil field major part in the development of Daqing Petroleum Institute's master's Diplomarbeit in 2006 solid slow-release antiseptic corrosion inhibitor and application and has entered the exploitation middle and later periods, along with applying of polymer flooding and ternary composite driving, downhole scaling, etching problem become more and more outstanding.Examine frequently pump, not only affect production capacity production, but also cause the huge waste of maintenance cost.Therefore solve downhole scaling and etching problem has become extremely urgent research topic.Develop a kind of solid slow-release antiseptic corrosion inhibitor, it is installed in the oil well pump lower end, when Produced Liquid flow through, it can slowly dissolve, and simultaneously anti-corrosion, scale-inhibiting effective constituent was wherein little by little discharged, and reached the purpose of inhibition and scale inhibition.And then can avoid oil well pump stuck by dirt layer institute, prolonged pump detection period.Analyzed a variety of causes of oil well produced liquid (being oilfield sewage) fouling in the literary composition.Think that in high pH value situation calcium, magnesium ion and silicate ion very easily form fouling by processes such as absorption, crystallization, sedimentations; And suitable temperature, slow flow velocity play the effect of acceleration to fouling.Mineral compound commonly used, the scale inhibitor mechanism of organic compound class Scale inhibitors theoretic analysis and research have been carried out.Be determined by experiment the optimum formula of solid corrosion and scale inhibitor.Wherein the main component of soluble solids carrier is polyvinyl alcohol, and this material has good solvability in water under 80～90 ℃ of conditions, and dissolution rate is relatively slow.
Summary of the invention
The objective of the invention is: provide a kind of for high water-cut stage oil well corrosion inhibiting and descaling agent, be used for high water-cut stage oil well corrosion inhibiting and descaling agent, the oil well corrosion inhibition rate reaches more than 85%, and scale inhibition performance reaches more than 90%.
The technical solution used in the present invention is: the raw material that is used for high water-cut stage oil well corrosion inhibiting and descaling agent comprises:
1, two adjacent methylthioureas (industrial goods), Zhao Fulin chief editor, " course teaching materials geared to the 21st century ", oilfield chemistry, press of China University Of Petroleum Beijing, the 1st edition the 6th printing February in 2007, the 186th page.Manufacturer: the Shijiazhuang grand chemical industry of length company limited.
2, ethylenediamine tetramethylene phosphonic acid salt, popular name: EDTMP (industrial goods), Zhao Fulin chief editor, " chemical agent for oil recovery ", press of University of Petroleum, the 1st edition the 1st printing June in 1997, the 121st page.Manufacturer: the Shijiazhuang grand chemical industry of length company limited.
3, dodecyl butylamine Dimethyl sulfide, Zhao Fulin chief editor, " chemical agent for oil recovery ", press of University of Petroleum, the 1st edition the 1st printing June in 1997, the 187th page.Manufacturer: the Shijiazhuang grand chemical industry of length company limited.
4, tetradecyl tributyl phosphonium chloride, another name, sterilant DTPC (industrial goods).(Huang Hongzhou edits " Chinese tensio-active agent overview " book, the 107th page of Chemical Industry Press);
Purposes: efficient, wide spectrum, low dosage, low foaming, low toxicity, glutinous mud is peeled off the sterilant of effect by force.Manufacturer: China PetroChemical Corporation's water treatment centers; Water quality stabilizer factory of Nanjing Chemical Engineering College.
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, another name: DN-3212 (industrial goods), " Chinese tensio-active agent overview " book of Huang Hongzhou chief editor, the 287th page of Chemical Industry Press;
Character: having excellent scale inhibition and dispersion performance and corrosion inhibition, is one of present more satisfactory multifunctional anti-incrustation dispersion agent.Low toxicity, chemical stability is good, can not decompose under general acid-base condition and high temperature.Purposes: dirt dispersion agent.Manufacturer: Wujin County, Jiangsu Province Dong Na chemical plant.
6, M-505A inhibiter (industrial goods), " Chinese tensio-active agent overview " book of Huang Hongzhou chief editor, the 414th page of Chemical Industry Press; Character: water-soluble imidazoline amide corrosion inhibitor.
Purposes: the water quick cooling that is used for ethylene cracker is the gun barrel of system but.At the bottom of the soul water stripper and cracking compressor intersegmental cooler, also can be used for normal pressure, vacuum distillation tower overhead condensation recovery system, in case the corrosion of sour gas.Manufacturer: the triumphant strange chemical industry in Shenzhen company limited, the long grand chemical industry in Shijiazhuang company limited.
7, SL-2 series corrosion inhibiting and descaling agent, another name: thiophosphatephosphorothioate imidazolidine derivatives (industrial goods), " Chinese tensio-active agent overview " book of Huang Hongzhou chief editor, the 556th page of Chemical Industry Press); Purposes: the anti-corrosion, scale-inhibiting of oil field produced water system.Manufacturer: Shengli Oil Field chemical technology development company.
8, methyl alcohol;
9, urotropine;
10, vitamin A;
11, water.
Each components by weight that is used for high water-cut stage oil well corrosion inhibiting and descaling agent is:
1, two adjacent methylthioureas (industrial goods): 3.25～4.0%;
2, ethylenediamine tetramethylene phosphonic acid salt (industrial goods): 12.5～13.5%;
3, dodecyl butylamine Dimethyl sulfide (industrial goods): 8.0～8.5%;
4, tetradecyl tributyl phosphonium chloride (industrial goods): 3.0～3.25%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer (industrial goods): 15.0～16.2%;
6, M-505A inhibiter (industrial goods): 5.25～5.75%;
7, SL-2 series corrosion inhibiting and descaling agent (industrial goods): 6.85～7.25%;
8, methyl alcohol (industrial goods): 5.0～7.5%;
9, urotropine (industrial goods): 3.4～3.75%;
10, vitamin A (industrial goods): 0.05～0.055%;
11, all the other are water, and each weight percentages of components sum is absolutely.
The production method that is used for high water-cut stage oil well corrosion inhibiting and descaling agent
Major equipment: the enamel reaction still with 2000L of stirring, heating, cooling and vacuum system.
Production method: at first, four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine Dimethyl sulfide, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride are added enamel reaction still by weight.Slowly be warmed up to 65～75 ℃.Secondly, add first methyl alcohol and answer 10% of add-on under constantly stirring, continue to stir after 30 minutes, add by weight proportion successively DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent again, the limit edged stirs; Then add by weight successively the methyl alcohol under urotropine, vitamin A and the residue, stirred 30 minutes, add by weight at last entry, stir stopped heating after 30 minutes, stir while cooling off, cool off and be stirred to normal temperature, obtain for high water-cut stage oil well corrosion inhibiting and descaling agent.
Summary is used for the using method of high water-cut stage oil well corrosion inhibiting and descaling agent, adds according to quantity from the oil jacket annular space on time, and field technician and operator are familiar with this work.
Beneficial effect of the present invention: the present invention is used for high water-cut stage oil well corrosion inhibiting and descaling agent, and dosage is in the situation of 50～60mg/l, and the oil well corrosion inhibition rate reaches more than 85%, and scale inhibition performance reaches more than 90%.Average pump detection period prolongs more than 1 times.
Embodiment
Embodiment 1: be used for high water-cut stage oil well corrosion inhibiting and descaling agent, each components by weight is:
1, two adjacent methylthioureas: 3.25%;
2, ethylenediamine tetramethylene phosphonic acid salt: 13.5%;
3, dodecyl butylamine Dimethyl sulfide: 8.1%;
4, tetradecyl tributyl phosphonium chloride: 3%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 16.2%;
6, M-505A inhibiter: 5.25%;
7, SL-2 series corrosion inhibiting and descaling agent: 7.15%;
8, methyl alcohol: 5%;
9, urotropine: 3.4%;
10, vitamin A: 0.05%;
11, water is 35.1%, and each weight percentages of components sum is absolutely.
Production method: at first, four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine Dimethyl sulfide, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride are added enamel reaction still by weight.Slowly be warmed up to 70 ℃.Secondly, add first methyl alcohol and answer 10% of add-on under constantly stirring, continue to stir after 30 minutes, add by weight proportion successively DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent again, the limit edged stirs; Then add by weight successively the methyl alcohol under urotropine, vitamin A and the residue, stirred 30 minutes, add by weight at last entry, stir stopped heating after 30 minutes, stir while cooling off, cool off and be stirred to normal temperature, obtain for high water-cut stage oil well corrosion inhibiting and descaling agent.
Dosage is in the situation of 55mg/l, and the oil well corrosion inhibition rate reaches 88%, and scale inhibition performance reaches 92%.
Embodiment 2: production method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 3.45%;
2, ethylenediamine tetramethylene phosphonic acid salt: 13.3%;
3, dodecyl butylamine Dimethyl sulfide: 8.2%;
4, tetradecyl tributyl phosphonium chloride: 3.1%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 16%;
6, M-505A inhibiter: 5.35%;
7, SL-2 series corrosion inhibiting and descaling agent: 7.05%;
8, methyl alcohol: 5.5%;
9, urotropine: 3.5%;
10, vitamin A: 0.052%;
11, water is 34.498%.
Dosage is in the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 85%, and scale inhibition performance reaches 95%.
Embodiment 3: production method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 3.65%;
2, ethylenediamine tetramethylene phosphonic acid salt: 13.2%;
3, dodecyl butylamine Dimethyl sulfide: 8.2%;
4, tetradecyl tributyl phosphonium chloride: 3.15%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.6%;
6, M-505A inhibiter: 5.55%;
7, SL-2 series corrosion inhibiting and descaling agent: 6.95%;
8, methyl alcohol: 5.9%;
9, urotropine: 3.6%;
10, vitamin A: 0.052%;
11, water is 34.148%.
Dosage is in the situation of 58mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 93%.
Embodiment 4: production method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 3.85%;
2, ethylenediamine tetramethylene phosphonic acid salt: 12.8%;
3, dodecyl butylamine Dimethyl sulfide: 8.1%;
4, tetradecyl tributyl phosphonium chloride: 3.17%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.8%;
6, M-505A inhibiter: 5.65%;
7, SL-2 series corrosion inhibiting and descaling agent: 6.9%;
8, methyl alcohol: 6%;
9, urotropine: 3.7%;
10, vitamin A: 0.054%;
11, water is 33.976%.
Dosage is in the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 92%.
Embodiment 5: production method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 4%;
2, ethylenediamine tetramethylene phosphonic acid salt: 12.5%;
3, dodecyl butylamine Dimethyl sulfide: 8.5%;
4, tetradecyl tributyl phosphonium chloride: 3.24%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.5%;
6, M-505A inhibiter: 5.75%;
7, SL-2 series corrosion inhibiting and descaling agent: 6.85%;
8, methyl alcohol: 7.3%;
9, urotropine: 3.75%;
10, vitamin A: 0.055%;
11, water is 32.555%.
Dosage is in the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 94%.
Claims (2)
1. one kind is used for high water-cut stage oil well corrosion inhibiting and descaling agent, and it is characterized in that: each components by weight is:
Two adjacent methylthioureas: 3.25～4.0%;
Ethylenediamine tetramethylene phosphonic acid salt: 12.5～13.5%;
Dodecyl butylamine Dimethyl sulfide: 8.0～8.5%;
Tetradecyl tributyl phosphonium chloride: 3.0～3.25%;
DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.0～16.2%;
M-505A inhibiter: 5.25～5.75%;
SL-2 series corrosion inhibiting and descaling agent: 6.85～7.25%;
Methyl alcohol: 5.0～7.5%;
Urotropine: 3.4～3.75%;
Vitamin A: 0.05～0.055%;
All the other are water, and each weight percentages of components sum is absolutely.
2. the production method for high water-cut stage oil well corrosion inhibiting and descaling agent according to claim 1, it is characterized in that: at first, four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine Dimethyl sulfide, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride are added enamel reaction still by weight; Slowly be warmed up to 65～75 ℃; Secondly, add first methyl alcohol and answer 10% of add-on under constantly stirring, continue to stir after 30 minutes, add by weight proportion successively DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent again, the limit edged stirs; Then add by weight successively the methyl alcohol under urotropine, vitamin A and the residue, stirred 30 minutes, add by weight at last entry, stir stopped heating after 30 minutes, stir while cooling off, cool off and be stirred to normal temperature, obtain for high water-cut stage oil well corrosion inhibiting and descaling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110198619 CN102321464B (en) | 2011-07-15 | 2011-07-15 | Corrosion and scale inhibitor for oil well in high water cut stage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110198619 CN102321464B (en) | 2011-07-15 | 2011-07-15 | Corrosion and scale inhibitor for oil well in high water cut stage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102321464A CN102321464A (en) | 2012-01-18 |
| CN102321464B true CN102321464B (en) | 2013-04-24 |
Family
ID=45449304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110198619 Active CN102321464B (en) | 2011-07-15 | 2011-07-15 | Corrosion and scale inhibitor for oil well in high water cut stage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102321464B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712504B (en) * | 2014-12-02 | 2018-08-10 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiting and descaling agent for acidic high-temperature gas water, preparation method and application |
| CN104726082B (en) * | 2015-03-27 | 2018-05-15 | 中国石油天然气集团公司 | A kind of organic base descaling agent applied to ternary composite driving and preparation method thereof |
| EP3548582A1 (en) * | 2016-12-02 | 2019-10-09 | Ecolab USA Inc. | Thiol-formyl hemiacetal corrosion inhibitors |
| WO2019028400A1 (en) | 2017-08-03 | 2019-02-07 | Ecolab Usa Inc. | Thiol adducts for corrosion inhibition |
| CN110016670B (en) * | 2019-05-21 | 2021-06-22 | 上海贵通新材料科技有限公司 | Antioxidant corrosion inhibitor |
| CN111620979A (en) * | 2020-04-27 | 2020-09-04 | 中国石油天然气股份有限公司 | Corrosion and scale inhibitor for oil and gas fields and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818350A (en) * | 2010-04-29 | 2010-09-01 | 同济大学 | Anti-oil well metal equipment corrosion inhibitor, preparation method and using method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW546370B (en) * | 2000-03-31 | 2003-08-11 | Ici Plc | Method of removing asphaltenes or petroleum waxes deposited in, or preventing, or inhibiting, the deposition of asphaltenes or petroleum waxes in, oil treatment equipment |
-
2011
- 2011-07-15 CN CN 201110198619 patent/CN102321464B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818350A (en) * | 2010-04-29 | 2010-09-01 | 同济大学 | Anti-oil well metal equipment corrosion inhibitor, preparation method and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102321464A (en) | 2012-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102321464B (en) | Corrosion and scale inhibitor for oil well in high water cut stage | |
| CN100513512C (en) | Corrosion-release scale-proof wax-removal viscosity-reducing agent and preparation method thereof | |
| CN101699268B (en) | Rapid judgment for corrosion of sodium bicarbonate water type oil well and corrosion inhibitor | |
| CN102899013A (en) | Clastic sandstone gas reservoir acidizing fluid | |
| CN102251247B (en) | Composite scale and rust cleaning agent | |
| CN103275684A (en) | Oilfield hot-washing oil-base high-efficiency paraffin-removal paraffin inhibitor | |
| US10094203B2 (en) | Corrosion inhibitors for drilling fluid brines | |
| CN107255024A (en) | A kind of high-content wax oil well microbial wax control method | |
| CN102604617A (en) | Carbonate scale removing agent for oil-water well | |
| CN105950126A (en) | Delaying controlled-release acid for acidizing unblocking, preparation method of acid and acidizing unblocking method | |
| CN108219767A (en) | A kind of offshore oilfield acid stimulation system and preparation method thereof | |
| CN102358834B (en) | Solid descaling acid rod for oil well | |
| CN108641694B (en) | Scale remover for oil well and preparation method thereof | |
| CN104745167A (en) | Organic acid antiscaling agent for tubular column of water injection well | |
| Jack et al. | Control in industrial settings | |
| CN102433564B (en) | Preparation method of Schiff-base corrosion inhibitor by condensation of o-oxy-acetate-benzaldehyde and substituted aniline | |
| Garcia et al. | Green corrosion inhibitors for water systems | |
| CN113403052A (en) | Corrosion-resistant scale-inhibiting slow-release particles for oil wells and preparation method thereof | |
| CN106928956A (en) | A kind of neutral hard scale softening agent for ternary composite driving screw bolt well | |
| CA1058854A (en) | Composition and method of removing scale from oil wells | |
| CN100336882C (en) | Wax-cleaning wax-preventing agent for water-driving polymer-driving oil well | |
| US3836462A (en) | Amine/phosphate composition useful as corrosion and scale inhibitor | |
| CN104651825A (en) | Method for surface treatment of petroleum machine parts | |
| CN108192589A (en) | A kind of organic base corrosion inhibiter handled for oil well acidation raffinate and preparation method thereof | |
| CN115612471B (en) | Ternary composite silicon scale removing agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |