CN102897926A - Barium-strontium scale inhibiting agent - Google Patents
Barium-strontium scale inhibiting agent Download PDFInfo
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- CN102897926A CN102897926A CN2012103120222A CN201210312022A CN102897926A CN 102897926 A CN102897926 A CN 102897926A CN 2012103120222 A CN2012103120222 A CN 2012103120222A CN 201210312022 A CN201210312022 A CN 201210312022A CN 102897926 A CN102897926 A CN 102897926A
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Abstract
The invention relates to a barium-strontium scale inhibiting agent mainly prepared from the components of, by weight: 30-35% of a maleic anhydride-acrylic acid copolymer, 18-22% of diethylenetriamine penta phosphonic acid, 12-16% of 2-phosphate-1,2,4-tricarboxylic butane, 7-12% of a surfactant, and 18-30% of deionized water. The scale inhibiting agent provided by the invention is characterized by low production cost, simple production process, high scaling inhibiting effect, and the like. Maleic anhydride has functions of calcium carbonate dispersion and calcium phosphate microcrystalline dispersion. Maleic anhydride has a scale-removing effect, and an excellent corrosion-retarding effect. Maleic anhydride has no toxicity and good thermal stability, and can be used under high temperature. During routine maintenance, maleic anhydride, acrylic acid, and methyl acrylate are used fro producing a novel copolymer under a certain condition; and the copolymer is composed with other high-molecular scale-removing substances, such that the scale inhibiting agent is prepared. A barium carbonate scale inhibiting rate of the scale inhibiting agent is no lower than 98%. With the scale inhibiting agent, a problem of large-area scaling during an oil recovery process is solved.
Description
Technical field
The present invention relates to a kind of Scale inhibitors, particularly a kind of barium-strontium antisludging agent.
Background technology
Along with the most of oil field of China enters the water flood recovery stage, the scale problems of oil recovery and gathering system becomes increasingly conspicuous.Fouling is huge for oil field harm, and the deposition of dirt in oil recovery, gathering system can increase the resistance of fluid flow, thereby increases energy consumption; Secondly also can cause underdeposit corrosion, impact is normally produced; Dirt blocks in the long-pending duct, stratum of also can causing of formation subsidence.Fouling is just becoming present oil field problem in the urgent need to address.Cause the reason of each scaling in oil field a lot, sum up and get up to mainly contain two aspects: at first be because the fouling that Produced Liquid and re-injection water are incompatible and cause; Next is owing to different from temperature, pressure on the earth's surface under the stratum, the fouling that the incrustation ion different solubility causes.
For the fouling of calcium carbonate and calcium sulfate, research and comparison both domestic and external is many, has also formed the effective method of a cover, but still is at present the stage of research for the distinctive barium sulfate in oil field, Strontium Sulphate scale problems.Copolymer antisludging agent is the Novel scale inhibitor of developing in recent years, because this Scale inhibitors has Heat stability is good, nontoxic, can produce synergy with organophosphate, calcium, strontium, barium, magnesium plasma are had very strong complexing action, become the focus of people's research.The barium-strontium antisludging agent of exploitation special efficacy has very large use value to the exploitation in oil field.Contain higher barium strontium ion in the dirt of oil field and mainly be owing to also have higher barium strontium ion in local water or the injected water, and be easy to sulfate radical and form barium and strontium sulfate.Hard difficult removal of barium strontium dirt is urgent problem in the oilfield process.
Summary of the invention
The objective of the invention is to provide a kind of barium-strontium antisludging agent, with solve in the existing oil production process fouling serious, form behind the barium strontium dirt technical problem such as hard difficult removal.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of barium-strontium antisludging agent, mainly formulated by described weight ratio by following component: horse propylene copolymer 30～35%, diethylene triamine pentamethylene phosphonic 18～22%, 2-phosphate-1,2,4-butane tricarboxylate 12～16%, tensio-active agent 7～12%, water 18～30%.
Prepare above-mentioned barium-strontium antisludging agent method: get horse propylene copolymer, diethylene triamine pentamethylene phosphonic, 2-phosphate-1,2 by described weight ratio, 4-butane tricarboxylate, tensio-active agent, ionized water carry out compound preparation, make barium-strontium antisludging agent.
As preferably, described horse propylene copolymer adopts the following methods preparation: a. drops into 110～130 parts of maleic anhydrides of maleic anhydride and 240～260 parts of ionized waters in reactor, start agitator and stir, be warming up to 40 ℃～50 ℃, add the hydrogen peroxide of 175-190 parts of volumetric concentrations 30%; Drip 290～310 parts of vinylformic acid at header tank, dripping simultaneously adds 75～85 parts of vinylformic acid formicesters, and time for adding is controlled at 3 hours, is warming up to 80 ℃～90 ℃ after dropwising, and stirs 2 hours, is cooled to normal temperature, obtains the horse propylene copolymer.
As preferably, described tensio-active agent is a kind of in sodium laurylsulfate (K12 or SDS), polyoxyethylene nonylphenol ether (TX-10), lauric acid amide of ethanol (6501), stearic acid monoglyceride, sulfonated lignin, the dispersing agent MF.
The present invention has the characteristics such as production cost is low, and production technique is simple, and the ant-scaling effect is strong.Maleic anhydride has the usefulness of disperseing calcium carbonate, calcium phosphate crystallite, not only has the effect of scale removal but also also has good corrosion inhibition; Its nontoxic, Heat stability is good can at high temperature use.Simultaneously also to the specific restriction of production of barium sulfate, Strontium Sulphate incrustation scale.When routine maintenance, maleic anhydride and vinylformic acid, vinylformic acid formicester are generated new multipolymer under certain condition; And the Scale inhibitors that itself and other polymer de-sludging material are combined into.Its resistance barium carbonate dirt rate is more than or equal to 98%, and resistance Strontium carbonate powder dirt rate has solved the problem that occurs large-area fouling in the oil recovery process more than or equal to 99%.
Embodiment
Embodiment 1: drop into 110 parts of maleic anhydrides of maleic anhydride and 260 parts of ionized waters in reactor, start agitator and stir, be warming up to 40 ℃～50 ℃, add the hydrogen peroxide of 175 parts of volumetric concentrations 30%; Drip 290 parts of vinylformic acid at header tank, dripping simultaneously adds 85 parts of vinylformic acid formicesters, and time for adding is controlled at 3 hours, is warming up to 80 ℃～90 ℃ after dropwising, and stirs 2 hours, is cooled to normal temperature, obtains the horse propylene copolymer.Detect acrylic monomer content more than or equal to 0.2%, pH value 2.5 ± 0.2, horse propylene copolymer solid content is more than or equal to 30%.Then measure by mass percentage horse propylene copolymer 30%, diethylene triamine pentamethylene phosphonic 18%, 2-phosphate-1,2,4-butane tricarboxylate 12%, sodium laurylsulfate (K12 or SDS) or polyoxyethylene nonylphenol ether (TX-10) 12%, water (having allowed a small amount of impurity) 28% carry out compound preparation; Obtained weak yellow liquid is barium-strontium antisludging agent.
Embodiment 2: drop into 120 parts of maleic anhydrides of maleic anhydride and 250 parts of ionized waters in reactor, start agitator and stir, be warming up to 40 ℃～50 ℃, add the hydrogen peroxide of 190 parts of volumetric concentrations 30%; Drip 300 parts of vinylformic acid at header tank, dripping simultaneously adds 80 parts of vinylformic acid formicesters, and time for adding is controlled at 3 hours, is warming up to 80 ℃～90 ℃ after dropwising, and stirs 2 hours, is cooled to normal temperature, obtains the horse propylene copolymer.Detect acrylic monomer content more than or equal to 0.2%, pH value 2.5 ± 0.2, horse propylene copolymer solid content is more than or equal to 30%.Then measure by mass percentage horse propylene copolymer 32%, lauric acid amide of ethanol (6501) or stearic acid monoglyceride 20%, 2-phosphate-1,2,4-butane tricarboxylate 15%, Yelkin TTS 10%, water (having allowed a small amount of impurity) 23% carry out compound preparation; Obtained weak yellow liquid is barium-strontium antisludging agent.
In order to verify effect of the present invention, the contriver has carried out a series of simultaneous test.
One. the static-state scale inhibition test.
1. the calcium carbonate static test the results are shown in shown in the following table:
Table 1: calcium carbonate static test
Testing data shows: adding 60ppm when above, scale inhibition performance of the present invention can reach more than 95.1%.
2. the calcium sulfate static test the results are shown in shown in the following table:
Table 2: calcium sulfate static test
Testing data shows: adding 60ppm when above, scale inhibition performance of the present invention can reach more than 93.5%.
3. the barium sulfate static test the results are shown in shown in the following table:
Table 3: barium sulfate static test
Testing data shows: adding 60ppm when above, scale inhibition performance of the present invention can reach more than 93.8%.
Two. static-state scale inhibition contrast experiment: evaluate take " scale inhibitor for oilfield Reliable Evaluating Methods of Their Performance " as standard.Select embodiment 1,2,3, under 50 ± 1 ℃ of waters bath with thermostatic control, adding of agent concentration 60ppm condition, compare with existing barium-strontium antisludging agent.Its experiment the results are shown in shown in the following table:
Table 4: barium sulfate, Strontium Sulphate static-state scale inhibition contrast experiment
| Scale inhibition performance | Scale inhibition barium sulfate rate of the present invention (mg/L) | Existing scale inhibition barium sulfate rate (mg/L) | Scale inhibition Strontium Sulphate rate of the present invention (mg/L) | Existing scale inhibition Strontium Sulphate rate (mg/L) |
| Embodiment 1 | 93.8 | 80.2 | 98.9 | 85.1 |
| Embodiment 2 | 95.8 | 79.8 | 96.5 | 85.2 |
| Embodiment 3 | 94.7 | 80.5 | 93.8 | 84.9 |
Above-mentioned statistic data shows: relatively existing barium-strontium antisludging agent, scale inhibition performance of the present invention has more by force performance, its high comprehensive performance.
Claims (3)
1. barium-strontium antisludging agent, it is characterized in that it is mainly formulated by described weight ratio by following component: horse propylene copolymer 30～35%, diethylene triamine pentamethylene phosphonic 18～22%, 2-phosphate-1,2,4-butane tricarboxylate 12～16%, tensio-active agent 7～12%, water 18～30%.
2. barium-strontium antisludging agent according to claim 1, it is characterized in that described horse propylene copolymer adopts the following methods preparation: a. drops into 110～130 parts of maleic anhydrides of maleic anhydride and 240～260 parts of ionized waters in reactor, starting agitator stirs, be warming up to 40 ℃～50 ℃, add the hydrogen peroxide of 175-190 parts of volumetric concentrations 30%; Drip 290～310 parts of vinylformic acid at header tank, dripping simultaneously adds 75～85 parts of vinylformic acid formicesters, and time for adding is controlled at 3 hours, is warming up to 80 ℃～90 ℃ after dropwising, and stirs 2 hours, is cooled to normal temperature, obtains the horse propylene copolymer.
3. barium-strontium antisludging agent according to claim 1 is characterized in that described tensio-active agent is a kind of in sodium laurylsulfate, polyoxyethylene nonylphenol ether, lauric acid amide of ethanol, stearic acid monoglyceride, sulfonated lignin, the dispersing agent MF.
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| CN103232118A (en) * | 2013-06-04 | 2013-08-07 | 南京林业大学 | Sodium lignin sulfonate compound corrosion and scale inhibitor and preparation method thereof |
| CN103820150A (en) * | 2014-03-14 | 2014-05-28 | 西安石油大学 | Barium sulfate and strontium sulfate descaling agent and preparation method thereof |
| CN104773847A (en) * | 2015-04-24 | 2015-07-15 | 中冶华天工程技术有限公司 | Phosphono maleic anhydride-acrylic acid copolymer, and preparation method and application thereof |
| CN104987858A (en) * | 2015-07-24 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Barium-strontium scale cleaning agent and preparation method thereof |
| CN105524605A (en) * | 2015-12-09 | 2016-04-27 | 中国石油天然气股份有限公司 | Modifier for preventing bittern scaling |
| CN111807527A (en) * | 2020-06-30 | 2020-10-23 | 天津正达科技有限责任公司 | Strontium-barium scale inhibitor for oil field water treatment and preparation method thereof |
| CN115746812A (en) * | 2022-11-30 | 2023-03-07 | 陕西延长石油（集团）有限责任公司 | Barium-strontium scale solid scale inhibitor capable of being rapidly detected and preparation method and application thereof |
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| CN104773847A (en) * | 2015-04-24 | 2015-07-15 | 中冶华天工程技术有限公司 | Phosphono maleic anhydride-acrylic acid copolymer, and preparation method and application thereof |
| CN104987858A (en) * | 2015-07-24 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Barium-strontium scale cleaning agent and preparation method thereof |
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| CN111807527A (en) * | 2020-06-30 | 2020-10-23 | 天津正达科技有限责任公司 | Strontium-barium scale inhibitor for oil field water treatment and preparation method thereof |
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| CN115746812B (en) * | 2022-11-30 | 2023-09-29 | 陕西延长石油（集团）有限责任公司 | Barium strontium scale solid scale inhibitor capable of being rapidly detected and preparation method and application thereof |
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