CN104925968A - Salt-tolerant and high-temperature-resistant antisludging agent and preparation method thereof - Google Patents
Salt-tolerant and high-temperature-resistant antisludging agent and preparation method thereof Download PDFInfo
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- CN104925968A CN104925968A CN201510394597.7A CN201510394597A CN104925968A CN 104925968 A CN104925968 A CN 104925968A CN 201510394597 A CN201510394597 A CN 201510394597A CN 104925968 A CN104925968 A CN 104925968A
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Abstract
The invention discloses a salt-tolerant and high-temperature-resistant antisludging agent. The agent is composed of, by weight, 49.5% of maleic anhydride, 18.0% of crylic acid, 10.5% of vinyl acetate, 1.0% pf 2-acrylamido-2-methylpropane sulfonic acid, 10.5% of ammonium persulfate and 10.5% of distilled water. The prepared antisludging agent is resistant to salt and high temperature, high in dispersion effect, high in use concentration and high in adaptability to the pH value.
Description
Technical field
The present invention relates to a kind of Scale inhibitors and preparation method thereof, particularly a kind of salt tolerant high-temperature-resistant scale inhibitor and preparation method thereof.
Background technology
The Tough questions that oilfield scaling has become to be affected field produces order, shorten oilfield life, oilfield scaling causes by under many factors comprehensive action, and summing up main reason has 3 points: chemical property is incompatible, thermodynamic condition changes and absorption; In various types of dirt, barium sulfate scale, because its compact structure and be generally insoluble to acid, becomes the oil field dirt type being difficult to most remove; At present also not for the Scale inhibitors of barium sulfate.
Summary of the invention
The invention provides a kind of Scale inhibitors that effectively can prevent the generation of barium sulfate scale.
The technical solution used in the present invention is: a kind of salt tolerant high-temperature-resistant scale inhibitor, is made up of following raw materials by weight: MALEIC ANHYDRIDE 49.5%, vinylformic acid 18.0%, vinyl-acetic ester 10.5%, 2-acrylamide-2-methyl propane sulfonic 1.0%, ammonium persulphate 10.5%, distilled water 10.5%.
A preparation method for salt tolerant high-temperature-resistant scale inhibitor, is characterized in that: comprise the following steps successively:
(1) raw material is taken by following weight percent: MALEIC ANHYDRIDE 49.5%, vinylformic acid 18.0%, vinyl-acetic ester 10.5%, 2-acrylamide-2-methyl propane sulfonic 1.0%, ammonium persulphate 10.5%, distilled water 10.5%;
(2) get MALEIC ANHYDRIDE and be placed in container, add appropriate distilled water until MALEIC ANHYDRIDE is dissolved;
(3) vinylformic acid, vinyl-acetic ester, 2-acrylamide-2-methyl propane sulfonic and the appropriate abundant mixed dissolution of distilled water is got;
(4) ammonium persulphate is got and remaining distilled water mixes;
(5) constant temperature after the solution in step (2) being heated to 60 DEG C, then slowly instills step (3) and the solution prepared by step (4) simultaneously;
(6) by obtained for step (5) solution warms to 80 DEG C constant temperature, until react completely;
(7) naturally cooling under room temperature, obtains required salt tolerant high-temperature-resistant scale inhibitor.
As preferably, in described step (5) and step (6), type of heating is heating in water bath.
As preferably, in described step (6), the reaction times is 5h.
The invention has the beneficial effects as follows:
(1) Scale inhibitors salt tolerant of the present invention is high temperature resistant, and dissemination is strong, and working concentration is high;
(2) Scale inhibitors of the present invention is to the strong adaptability of potential of hydrogen;
(3) preparation method in the present invention is simple to operate, and material cost is cheap.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Take 188g MALEIC ANHYDRIDE, 68g vinylformic acid, 40g vinyl-acetic ester, 4g2-acrylamide-2-methyl propane sulfonic, 40g ammonium persulphate and 40g distilled water; Then get MALEIC ANHYDRIDE and be placed in beaker, add 25g distilled water, after MALEIC ANHYDRIDE solid dissolves completely, above-mentioned solution is poured in four-hole boiling flask; Get vinylformic acid, vinyl-acetic ester, 2-acrylamide-2-methyl propane sulfonic and 5g distilled water and make mixing solutions, mixing solutions is moved in constant voltage separating funnel; Get ammonium persulphate and 10g distilled water is configured to ammonium persulfate solution; Maleic acid anhydride solution is placed in water-bath after being heated to 60 DEG C, drip vinylformic acid, vinyl-acetic ester, the distilled water solution of 2-acrylamide-2-methyl propane sulfonic and ammonium persulfate solution simultaneously, copolyreaction is made to start to carry out, control rate of addition, solution is dropwised at 1 hours; Be added dropwise to complete rear adjustment bath temperature, make reaction system be warming up to 80 DEG C, and continue isothermal reaction 5 hours; Stop heating, naturally cooling under room temperature, obtains faint yellow viscous oil-like liquid and is this salt tolerant high-temperature-resistant scale inhibitor.
The inhibitor mechanism of the Scale inhibitors in the present invention is based upon on the basis of chelating solublization, dissemination, electrostatic repulsion effect and lattice distortion effect, and this Scale inhibitors effectively can prevent the generation of barium sulfate scale.
Scale inhibitors working concentration of the present invention is when more than 100mg/L, and scale inhibition performance can reach more than 80%, and working concentration is when 200mg/L, and scale inhibition performance is the highest; And still can keep better performance at relatively high temperatures, when 50 DEG C, scale inhibition performance is up to 92.59%, when temperature reaches 120 DEG C, scale inhibition performance still can remain on more than 67%; And comparatively strong to the adaptability of potential of hydrogen, under alkaline environment, scale inhibition performance is higher than sour environment, and pH value is that under the condition of 4, scale inhibition performance is more than 58%, and when pH value is 10, scale inhibition performance is up to 85.84%; This salt tolerant high-temperature-resistant scale inhibitor salt tolerant effect is better, when salinity 30000mg/L, can keep the scale inhibition performance of 76.4%.
Scale inhibitors the present invention prepared carries out performance test, and its test result is as shown in table 1:
Table 1 performance of antisludging agent test result
This salt tolerant high-temperature-resistant scale inhibitor is when temperature reaches 120 DEG C as can be seen from Table 1, still there is the scale inhibition performance of 67.1%, resistance to elevated temperatures is better, when salinity is 30000mg/L, scale inhibition performance is 76.4%, salt tolerant effect also can meet most of high salinity Oil/gas Well, and this salt tolerant high-temperature-resistant scale inhibitor working concentration is lower, when working concentration reaches 100mg/L, scale inhibition performance just can reach more than 81%, and the feature that this Scale inhibitors also has is in sour environment to the strong adaptability of alkaline environment.
Above-mentioned embodiment is intended to illustrate that the present invention can be professional and technical personnel in the field and realizes or use; modifying to above-mentioned embodiment will be apparent for those skilled in the art; therefore the present invention includes but be not limited to above-mentioned embodiment; any these claims or specification sheets of meeting describes; meet and principle disclosed herein and novelty, the method for inventive features, technique, product, all fall within protection scope of the present invention.
Claims (4)
1. a salt tolerant high-temperature-resistant scale inhibitor, is characterized in that: be made up of following raw materials by weight: MALEIC ANHYDRIDE 49.5%, vinylformic acid 18.0%, vinyl-acetic ester 10.5%, 2-acrylamide-2-methyl propane sulfonic 1.0%, ammonium persulphate 10.5%, distilled water 10.5%.
2. a preparation method for salt tolerant high-temperature-resistant scale inhibitor as claimed in claim 1, is characterized in that: comprise the following steps successively:
(1) raw material is taken by following weight percent: MALEIC ANHYDRIDE 49.5%, vinylformic acid 18.0%, vinyl-acetic ester 10.5%, 2-acrylamide-2-methyl propane sulfonic 1.0%, ammonium persulphate 10.5%, distilled water 10.5%;
(2) get MALEIC ANHYDRIDE and be placed in container, add appropriate distilled water until MALEIC ANHYDRIDE is dissolved;
(3) vinylformic acid, vinyl-acetic ester, 2-acrylamide-2-methyl propane sulfonic and the appropriate abundant mixed dissolution of distilled water is got;
(4) ammonium persulphate is got and remaining distilled water mixes;
(5) constant temperature after the solution in step (2) being heated to 60 DEG C, then slowly instills step (3) and the solution prepared by step (4) simultaneously;
(6) by obtained for step (5) solution warms to 80 DEG C constant temperature, until react completely;
(7) naturally cooling under room temperature, obtains required salt tolerant high-temperature-resistant scale inhibitor.
3. the preparation method of a kind of salt tolerant high-temperature-resistant scale inhibitor according to claim 2, is characterized in that: in described step (5) and step (6), type of heating is heating in water bath.
4. the preparation method of a kind of salt tolerant high-temperature-resistant scale inhibitor according to claim 2, is characterized in that: in described step (6), the reaction times is 5h.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108002551A (en) * | 2017-12-28 | 2018-05-08 | 新疆环境工程技术有限责任公司 | A kind of wet method fume desulfurizing system scale preventative and preparation method thereof |
| CN109748405A (en) * | 2019-02-20 | 2019-05-14 | 中国石油大学(华东) | A kind of oil field heat-resistance type Barium/Strontium Sulfate scale preventative and preparation method thereof |
| CN111382486A (en) * | 2018-12-27 | 2020-07-07 | 中国石油天然气股份有限公司 | CO prediction based on stability index2Method for gas drive wellbore scaling tendency |
| CN111441748A (en) * | 2018-12-27 | 2020-07-24 | 中国石油天然气股份有限公司 | Predicting CO2Method for scaling trend of gas drive oil and gas well shaft |
| CN113480017A (en) * | 2020-11-11 | 2021-10-08 | 深圳市腾龙源实业有限公司 | Novel high-temperature dispersion scale inhibitor for high-salinity wastewater quench tower back-spray evaporation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108002551A (en) * | 2017-12-28 | 2018-05-08 | 新疆环境工程技术有限责任公司 | A kind of wet method fume desulfurizing system scale preventative and preparation method thereof |
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| CN111441748A (en) * | 2018-12-27 | 2020-07-24 | 中国石油天然气股份有限公司 | Predicting CO2Method for scaling trend of gas drive oil and gas well shaft |
| CN111382486B (en) * | 2018-12-27 | 2022-03-29 | 中国石油天然气股份有限公司 | CO prediction based on stability index2Method for gas drive wellbore scaling tendency |
| CN109748405A (en) * | 2019-02-20 | 2019-05-14 | 中国石油大学(华东) | A kind of oil field heat-resistance type Barium/Strontium Sulfate scale preventative and preparation method thereof |
| CN109748405B (en) * | 2019-02-20 | 2022-04-08 | 中国石油大学(华东) | Temperature-resistant barium strontium sulfate scale inhibitor for oil field and preparation method thereof |
| CN113480017A (en) * | 2020-11-11 | 2021-10-08 | 深圳市腾龙源实业有限公司 | Novel high-temperature dispersion scale inhibitor for high-salinity wastewater quench tower back-spray evaporation system |
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