CN101735786A - Barium-strontium scale inhibitor - Google Patents
Barium-strontium scale inhibitor Download PDFInfo
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- CN101735786A CN101735786A CN200810227273A CN200810227273A CN101735786A CN 101735786 A CN101735786 A CN 101735786A CN 200810227273 A CN200810227273 A CN 200810227273A CN 200810227273 A CN200810227273 A CN 200810227273A CN 101735786 A CN101735786 A CN 101735786A
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- barium
- strontium
- scale inhibitor
- terpolymer
- strontium scale
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Abstract
The invention relates to a barium-strontium scale inhibitor which belongs to the technical field of oil-field chemical agent designs. The barium-strontium scale inhibitor is characterized in that unsaturated organic acid and acrylic ester are added to maleic anhydride for reacting and copolymerizing to obtain a terpolymer under the action of an initiator persulfate; the maleic anhydride firstly reacts to generate epoxy succinate under the action of a catalyst tungstate and an oxidant hydrogen peroxide, and then the epoxy succinate is polymerized to generate polyepoxy succinate under the action of a compound hydroxide initiator; and the synthesized terpolymer and the polyepoxy succinate are compounded according to a mass percent of 1:(0.1-5.0) to prepare the barium-strontium scale inhibitor. The barium-strontium scale inhibitor does not contain phosphorus; and when in use, the dosage is less, and the effect is great. The barium-strontium scale inhibitor can be effectively applied to prevent barium-strontium scales and compound scales containing calcium in oil fields and has the characteristics of excellent property of resisting barium-strontium scales, lower cost, environmental protection, temperature resistance and stable scale resisting property.
Description
Technical field:
The present invention relates to a kind of barium-strontium scale inhibitor, belong to oilfield chemistry agent design field.
Background technology:
In recent years, along with the exploitation middle and later periods is stepped in domestic each oil field in succession, the major measure that water flooding recovery has become and increased crude production rate, improved recovery ratio.But because injection water quality is unstable and with being incompatible of local water, generation precipitates with becoming dirty positively charged ion to interact to cause into dirty negatively charged ion, forms various types of oil fields dirt, thereby influences the ordinary production of crude oil.The formation of oil field dirt mainly contains two characteristics: calcium ion content height in (1) petroleum wastewater, and carbonate, sulfate radical etc. form the calcium dirt among the Yi Yushui; (2) part oil field stratum water or injection water contain higher barium strontium ion, and easy and sulfate radical forms barium and strontium sulfate.Barium and strontium sulfate solubleness is little, 2.5mg/L only under the normal temperature, and hard being difficult to of dirty matter remove, be to be badly in need of the long-standing problem that solves in the present oilfield process.
Summary of the invention:
In order to overcome the deficiencies in the prior art part, the object of the present invention is to provide a kind of barium-strontium scale inhibitor, can be effective to anti-barium strontium dirt in oil field and the compound dirt of calcic, have resistance barium strontium dirt excellent performance, cost is lower, and the characteristics of temperature resistance and scale inhibition stability are preferably arranged.
The present invention realizes above-mentioned purpose by following technical solution.
1, the preparation of terpolymer
Add unsaturated organic acid (as methacrylic acid) and acrylate in maleic anhydride, the reaction copolymerization makes under the effect of initiator persulphate.Its chemical equation is as follows:
In the formula: R
1: CH
2CH-, CH
2C (CH
3)-; R
2: CH
3-, CH
3CH
2-
2, the preparation of polyepoxysuccinic acid salt
Maleic anhydride reaction earlier under the effect of catalyst tungstate and oxidant hydrogen peroxide is generated the epoxy succinic hydrochlorate, and then, under the complex hydroxide action of evocating, polymerization generates polyepoxysuccinic acid salt to the epoxy succinic hydrochlorate again.Its chemical equation is as follows:
3, the preparation of barium-strontium scale inhibitor
With synthetic terpolymer and polyepoxysuccinic acid salt is 1: 0.1～5.0 to carry out compositely by mass percentage, promptly gets barium-strontium scale inhibitor, a kind of barium-strontium scale inhibitor promptly of the present invention.
The present invention compared with prior art has following beneficial effect:
1, not phosphorous in this Scale inhibitors, have environment friendly.
Amount was imitated grandly less when 2, this Scale inhibitors used, and only was 30～40mg/L, saved use cost.
3, this Scale inhibitors has temperature resistance and scale inhibition stability preferably.
Embodiment:
1, the preparation of terpolymer
1. in the four-hole boiling flask that electric mixer, dropping funnel and reflux condensing tube are housed, add the maleic anhydride of 0.5mol and the distilled water of 1.0～4.5mol, be heated with stirring to 60～75 ℃.
2. the dropping funnel of mixture of acrylate of the unsaturated organic acid methacrylic acid of 0.1～0.3mol and 0.25～0.5mol and the dropping funnel that the persulfate solution of 0.01～0.03mol is housed will be housed in flask, drip monomer and initiator simultaneously, and in 0.5～1.5, hour dropwise.
3. then with mixed solution heat temperature raising to 80～95 ℃, reacted 3～6 hours, cool off light yellow transparent liquid, and transfer pH=7 with high alkali liquid, promptly get required terpolymer.
2, the preparation of polyepoxysuccinic acid salt
1. in the there-necked flask that thermometer, dropping funnel and constant speed stirrer are housed, add the maleic anhydride of 0.2mol and the distilled water of 1.0～3.0mol, under whipped state, slowly drip high alkali liquid, conditioned reaction liquid pH to 4～6.
When 2. being heated to 45～55 ℃, the catalyst tungstate that adds 0.0015～0.003mol drips hydrogen peroxide 0.50～0.75mol with dropping funnel then in 15～35min, and regulates pH=7.0 with high alkali liquid, about 1～the 4h of constant temperature (60～80 ℃) reaction can get the epoxy succinic hydrochlorate.
3. cool off the reaction solution of above-mentioned steps in 2., add sulfuric acid and regulate its pH to 2.0～5.0, left standstill 1～5 hour, separate out the epoxy succinic hydrochlorate, and filtration drying.
4. exsiccant epoxy succinic hydrochlorate is mixed with the solution of 2.0mol/L, and pipette 50ml epoxy succinic acid salt solution to four-hole boiling flask, oil bath is heated to temperature of reaction, add the complex hydroxide initiator in batches, the constant speed stirring reaction, become big and gradually become faint yellow to soltion viscosity, finish reaction, make the polyepoxysuccinic acid salt product.
3, the preparation of barium-strontium scale inhibitor
With synthetic terpolymer and polyepoxysuccinic acid salt is 1: 0.1～5.0 to carry out compositely by mass percentage, promptly gets a kind of barium-strontium scale inhibitor of the present invention.
If be used for low barium strontium local water of high calcium or injection water quality, the mass percent of terpolymer and polyepoxysuccinic acid salt is 1: 1.5～4.0 in the barium-strontium scale inhibitor.
If be used for low calcium high barium strontium local water or injection water quality, the mass percent of terpolymer and polyepoxysuccinic acid salt is 1: 0.3～1.0 in the barium-strontium scale inhibitor.
The effect example of a kind of barium-strontium scale inhibitor of the present invention:
Because each oil field water quality situation difference can divide the low barium strontium water quality of high calcium and two kinds of situations of the high barium strontium of low calcium water quality to investigate result of use of the present invention:
(1), the low barium strontium water quality of high calcium
Simulated formation water water quality data: Ca
2+: 750mg/L, Ba
2+: 100mg/L, Sr
2+: 50mg/L, SO
4 2-: 1000mg/L, HCO
3 -: 1000mg/L, experimental result is as shown in table 1:
Table 1 barium-strontium scale inhibitor (terpolymer: scale inhibition effect polyepoxysuccinic acid salt=1: 1.5～3)
| Scale inhibitors dosage (mg/L) | Experimental phenomena |
| 0 | A large amount of flakes calcium dirts and a large amount of fine and close barium strontium dirt are arranged at the bottom. |
| 10 | Calcium dirt and a spot of barium strontium dirt are arranged at the bottom. |
| 20 | A spot of calcium dirt is arranged at the bottom, does not find barium strontium dirt. |
| 30 | The calcium dirt of minute quantity is arranged at the bottom. |
| 40 | Solution is clarified fully. |
Can find out from the experimental result of table 1,, when barium-strontium scale inhibitor is 40mg/L at dosage, can make that simulated formation water is clarified fully, non-scaling, scale inhibition performance nearly 100% the low barium strontium water quality of high calcium.
(2), the low high barium strontium of calcium water quality
Simulated formation water water quality data: Ca
2+: 400mg/L, Ba
2+: 500mg/L, Sr
2+: 500mg/L, SO
4 2-: 1000mg/L, HCO
3 -: 1000mg/L, experimental result is as shown in table 2:
Table 2, barium-strontium scale inhibitor (terpolymer: scale inhibition effect polyepoxysuccinic acid salt=1: 0.3～1.0)
| Scale inhibitors dosage (mg/L) | Experimental phenomena |
| 0 | A large amount of flakes calcium dirts and a large amount of fine and close barium strontium dirt are arranged at the bottom. |
| 10 | A spot of calcium dirt and a large amount of barium strontium dirts are arranged at the bottom. |
| 20 | Calcium dirt and a spot of barium strontium dirt of minute quantity arranged at the bottom. |
| 30 | A spot of barium strontium dirt is arranged at the bottom. |
| Scale inhibitors dosage (mg/L) | Experimental phenomena |
| 40 | Solution is clarified fully. |
Can find out from the experimental result of table 2,, when the barium-strontium scale inhibitor dosage is 40mg/L, simulated formation water is clarified fully, non-scaling, scale inhibition performance nearly 100% the low high barium strontium of calcium water quality.
Claims (6)
1. barium-strontium scale inhibitor is characterized in that:
(1) add unsaturated organic acid and acrylate in maleic anhydride, the reaction copolymerization makes terpolymer under the effect of initiator persulphate;
(2) maleic anhydride reaction earlier under the effect of catalyst tungstate and oxidant hydrogen peroxide is generated the epoxy succinic hydrochlorate, then, under the complex hydroxide action of evocating, polymerization generates polyepoxysuccinic acid salt to the epoxy succinic hydrochlorate again;
(3) be 1: 0.1～5.0 to carry out compositely by mass percentage with synthetic terpolymer and polyepoxysuccinic acid salt, promptly make barium-strontium scale inhibitor.
2. a kind of barium-strontium scale inhibitor according to claim 1, it is characterized in that the maleic anhydride that adds is that 0.5mol, distilled water are that 1.0～4.5mol, unsaturated organic acid methacrylic acid are that 0.1～0.3mol, acrylate are that 0.25～0.5mol, persulfate solution are 0.01～0.03mol when making terpolymer, and reaction solution is transferred pH=7 with high alkali liquid.
3. a kind of barium-strontium scale inhibitor according to claim 1, it is characterized in that the maleic anhydride that adds is that 0.2mol, distilled water are that 1.0～3.0mol, catalyst tungstate are that 0.0015～0.003mol, hydrogen peroxide are 0.50～0.75mol when making polyepoxysuccinic acid salt, and reaction solution is transferred pH=7 with high alkali liquid.
4. according to claim 2,3 described a kind of barium-strontium scale inhibitors, it is characterized in that with synthetic terpolymer and polyepoxysuccinic acid salt be by mass percentage 1: 0.1～5.0 carry out composite.
5. a kind of barium-strontium scale inhibitor according to claim 4, it is characterized in that with synthetic terpolymer and polyepoxysuccinic acid salt be by mass percentage 1: 1.5～4.0 carry out composite.
6. a kind of barium-strontium scale inhibitor according to claim 4, it is characterized in that with synthetic terpolymer and polyepoxysuccinic acid salt be by mass percentage 1: 0.3～1.0 carry out composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810227273A CN101735786A (en) | 2008-11-25 | 2008-11-25 | Barium-strontium scale inhibitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810227273A CN101735786A (en) | 2008-11-25 | 2008-11-25 | Barium-strontium scale inhibitor |
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| Publication Number | Publication Date |
|---|---|
| CN101735786A true CN101735786A (en) | 2010-06-16 |
Family
ID=42459825
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|---|---|---|---|
| CN200810227273A Pending CN101735786A (en) | 2008-11-25 | 2008-11-25 | Barium-strontium scale inhibitor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771594A (en) * | 2012-10-23 | 2014-05-07 | 长江大学 | Barium-strontium scale inhibitor |
| CN104211188A (en) * | 2014-07-31 | 2014-12-17 | 西安石油大学 | Anti-scale agent used for barium, strontium and iron and preparation method thereof |
| CN106398659A (en) * | 2016-08-30 | 2017-02-15 | 陕西省石油化工研究设计院 | Calcium fluoride stabilizing agent |
| CN106833581A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Chelating agent and preparation method and application thereof |
| CN106833577A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Construction method for cleaning and preventing scale on-line acidification multi-section plug |
| CN106833576A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Scale cleaning and preventing agent and preparation method thereof |
| CN114426339A (en) * | 2021-12-30 | 2022-05-03 | 中国石油化工股份有限公司 | Oil field barium sulfate dispersion scale inhibitor and preparation method thereof |
-
2008
- 2008-11-25 CN CN200810227273A patent/CN101735786A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771594A (en) * | 2012-10-23 | 2014-05-07 | 长江大学 | Barium-strontium scale inhibitor |
| CN104211188A (en) * | 2014-07-31 | 2014-12-17 | 西安石油大学 | Anti-scale agent used for barium, strontium and iron and preparation method thereof |
| CN104211188B (en) * | 2014-07-31 | 2016-04-13 | 西安石油大学 | A kind of barium strontium iron scale inhibitor |
| CN106398659A (en) * | 2016-08-30 | 2017-02-15 | 陕西省石油化工研究设计院 | Calcium fluoride stabilizing agent |
| CN106833581A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Chelating agent and preparation method and application thereof |
| CN106833577A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Construction method for cleaning and preventing scale on-line acidification multi-section plug |
| CN106833576A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Scale cleaning and preventing agent and preparation method thereof |
| CN114426339A (en) * | 2021-12-30 | 2022-05-03 | 中国石油化工股份有限公司 | Oil field barium sulfate dispersion scale inhibitor and preparation method thereof |
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Application publication date: 20100616 |