CN104019087A - Method for reducing flow resistance of halogen collecting and conveying pipeline - Google Patents
Method for reducing flow resistance of halogen collecting and conveying pipeline Download PDFInfo
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- CN104019087A CN104019087A CN201410264397.5A CN201410264397A CN104019087A CN 104019087 A CN104019087 A CN 104019087A CN 201410264397 A CN201410264397 A CN 201410264397A CN 104019087 A CN104019087 A CN 104019087A
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- flow resistance
- acrylamide
- pipeline road
- conveying pipeline
- amps
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Abstract
The invention relates to a method for reducing the flow resistance of a halogen collecting and conveying pipeline. Temperature-resistant and salt-resistant water soluble drag reduction agents are added into the halogen collecting and conveying pipeline for bittern passing through an electric submersible pump, and therefore the flow resistance of the halogen collecting and conveying pipeline can be reduced. The temperature-resistant and salt-resistant water soluble drag reduction agents are sulfomethylation polyacrylamide (SPAM) or poly (acrylamide/2-acrylamide-2-methylpro panesulfonic acid) [P(AM/AMPS)]. The two drag reduction agents of SPAM and P (AM/AMPS) have high drag reduction performance in the halogen collecting and conveying pipeline, and the drag reduction performance is obviously better than drag reduction performance of PAM.
Description
Technical field
The present invention relates to a kind of reduction and adopt the method for brine pipeline road flow resistance, belong to subsurface brine exploitation and pipe transportation technology field.
Background technique
Along with petering out of shallow-layer subsurface brine, the exploitation of the deep layer subsurface brine that buried depth is thousands of meters has been subject to people's extensive concern.But deep layer subsurface brine recovery process energy consumption is too high, how to reduce adopt, the flow resistance in brine pipeline road, save exploitation energy consumption, be the key technology difficult problem that can deep layer subsurface brine the economic exploitation.
At present, friction-reducing additive drag reduction technology has been successfully applied to crude oil and product pipeline.By adding a small amount of oil-soluble drag reducer to crude oil or product pipeline, can significantly reduce Flows resistance, realize the object that increases throughput rate or energy efficient.The applicable cases in crude oil and product pipeline according to friction-reducing additive drag reduction mechanism and friction-reducing additive drag reduction technology, friction-reducing additive drag reduction technology is applied to adopt brine pipeline road, can reduce adopt, the flow resistance in brine pipeline road, realize the object that increases throughput rate or energy efficient.
Seldom, study more water-soluble friction-reducing additive is polyacrylamide (PAM) to the research report of water-soluble friction-reducing additive, but the heatproof of PAM, salt resistant character are very poor, and the drag-reduction effect in adopting brine pipeline road is very undesirable.Therefore, that finds heatproof, salt tolerant adopts brine pipeline road friction-reducing additive, for reducing the flow resistance of adopting brine pipeline road, significant for the economic exploitation of deep layer subsurface brine.The application study of friction-reducing additive drag reduction technology in adopting brine pipeline road has no bibliographical information.
Summary of the invention
To the object of the invention is the flow resistance of adopting brine pipeline road in order reducing, to overcome the too high difficult problem of deep layer subsurface brine recovery process energy consumption, provide a kind of reduction to adopt the method for brine pipeline road flow resistance.
The technological scheme that the present invention takes is:
A method for brine pipeline road flow resistance is adopted in reduction, to bittern, through the water-soluble friction-reducing additive that adds heatproof, salt tolerant in brine pipeline road of adopting after electric submersible pump, can reduce the flow resistance of adopting brine pipeline road.The water-soluble friction-reducing additive of described heatproof, salt tolerant is sulfomethylation polyacrylamide (SPAM) or poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid) [P (AM/AMPS)].
Described sulfomethylation polyacrylamide (SPAM) or poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid) [P (AM/AMPS)], its mean molecule quantity is all greater than 3,000,000.
Described sulfomethylation polyacrylamide (SPAM) or poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid) [P (AM/AMPS)], its addition is 10-50ppm.
Described sulfomethylation polyacrylamide (SPAM) is preferably prepared by method below:
The polyacrylamide that is 8,000,000 by commercially available molecular weight (AM) is made the aqueous solution of 2wt%, joins in 500mL four-hole boiling flask, passes into nitrogen, and after 10min, with 10wt% sodium hydroxide solution, adjusting reaction system pH is 10～11, by PAM:NaHSO
3: CH
2o mass ratio is that the ratio of 4:6:3 takes sodium bisulfite and formaldehyde, and be made into respectively the aqueous solution of 20wt%, successively sodium bisulfite and formalin are joined in reaction system, it is 62 ℃ that temperature of reaction system is controlled in water-bath, and reaction 4h obtains sulfomethylation polyacrylamide solution.
Product is measured by homemade drag reducing efficiency test loop path at the ducted drag reducing efficiency of bittern.
Described poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid) [P (AM/AMPS)] preferably prepared by method below:
The ratio that is 4:1 in AM:AMPS mass ratio, is mixed with the aqueous solution that total monomer is 17wt%, joins in 500ml four-hole boiling flask, passes into nitrogen 30min.Take potassium peroxydisulfate and sodium bisulfite and be dissolved in respectively the solution of making 0.2wt% in distilled water, in the ratio of monomer gross mass 0.01%, respectively get equivalent potassium peroxydisulfate and solution of sodium bisulfite joins in aforementioned polymerization reaction system, water-bath temperature control is at 30 ℃, keep logical nitrogen, after reaction 6h, obtain poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid) aqueous solution.
By rheological properties-gel permeation chrommatograph simultaneous determination, its molecular weight is greater than 3,000,000.Product is measured by homemade drag reducing efficiency test loop path at the ducted drag reducing efficiency of bittern.
The existing bibliographical information of preparation method of the polymer SPAM the present invention relates to, but have no the report that is applied to adopt brine pipeline road.The present invention passes through preferably by PAM:NaHSO
3: CH
2the mass ratio of O is controlled at 4:6:3, introduces appropriate sulphur methyl, makes the pliability of polymer molecule in appropriate level, has both increased heatproof, salt resistant character, has kept again its resistance reducing performance.
The existing bibliographical information of preparation method of the polymer P the present invention relates to (AM/AMPS), but have no the report that is applied to adopt brine pipeline road.The present invention, by preferably, controls the mass ratio of AM and AMPS, makes the pliability of frictional reducing polymer in appropriate level, and the ratio of AMPS is too low, and the poor rigidity of resulting polymers molecule is easily curling, and heatproof, salt resistant character are poor.The ratio of AMPS is too high, and the rigidity of molecule is strong, and molecular chain follows the string, resistance reducing performance variation.Control reaction region, polymerisation is carried out at a lower temperature, be conducive to molecular chain and increase, obtain the polymer that molecular weight is greater than 3,000,000, molecular weight does not have drag reduction effect lower than 1,000,000.
The invention has the beneficial effects as follows, SPAM is joined in the ratio of 20ppm in the simulation bittern of 20 ℃ of temperature, sodium chloride content 150g/L, under the condition of Re=32000, when the drag reducing efficiency of bittern pipeline is 39%, 50 ℃, drag reducing efficiency is 33%; P (AM/AMPS) is joined in the ratio of 20ppm in the simulation bittern of 20 ℃ of temperature, sodium chloride content 150g/L, under the condition of Re=32000, when the drag reducing efficiency of bittern pipeline is 49%, 50 ℃, drag reducing efficiency is 37%.And under the same terms, PAM is only 32% and 17% at the drag reducing efficiency of 20 ℃ and 50 ℃.Show that two kinds provided by the invention are adopted brine pipeline road friction-reducing additive SPAM and P (AM/AMPS) has higher resistance reducing performance in adopting brine pipeline road, significantly better than PAM.
Accompanying drawing explanation
Fig. 1 is drag reducing efficiency test loop path.
Fig. 2 is that friction-reducing additive drag reducing efficiency is with the relation curve of friction-reducing additive change in concentration under the condition of 20 ℃ of water temperatures, sodium chloride content 150g/L, Re=32000.
Under the condition that Fig. 3 is is 20ppm in 20 ℃ of water temperatures, Re=32000, frictional reducing polymer addition, the influence curve of simulation Brine salinity to drag reducing efficiency.
Fig. 4 is to be under the condition of 20ppm, Re=32000 in sodium chloride content 150g/L, the poly-addition of drag reduction compound, the influence curve of simulation brine temperature to drag reducing efficiency.
In figure, 1 is testing tube, and 2,3 is pressure gauge, and 4 is rotameter, and 5 is flow control valve, and 6 is electromagnetic pump, and 7 is aqua storage tank, and 8 is heating stick, and 9 is blowdown valve.
Embodiment
Below by instantiation, the present invention will be further elaborated, should be noted that following embodiment is only in order to explain the present invention, does not limit its content.
Embodiment 1:
Take commercially available molecular weight and be 8,000,000 polyacrylamide 6g and make the 2wt% aqueous solution, join in 500mL four-hole boiling flask, pass into nitrogen, after 10min, with 10% sodium hydroxide solution, adjusting reaction system pH is 10～11.Press PAM:NaHSO
3: CH
2o mass ratio is that the ratio of 4:6:3 takes sodium bisulfite and formaldehyde, and be made into respectively 20% aqueous solution, successively sodium bisulfite and formalin are joined in reaction system, it is 62 ℃ that temperature of reaction system is controlled in water-bath, and reaction 4h obtains sulfomethylation polyacrylamide solution.Taking this sulfomethylation polyacrylamide solution 20g (being approximately equivalent to straight polymer 1g) is dissolved in the simulation bittern of 20 ℃ of 50L water temperatures, sodium chloride content 150g/L, under the condition of Re=32000, when the drag reducing efficiency that records synthetic friction-reducing additive is 39%, 50 ℃, drag reducing efficiency is 33%.
Embodiment 2:
Take 40g AM and 10g AMPS, after dissolving in 245g distilled water, join in 500ml four-hole boiling flask, turn on agitator, water-bath temperature control, at 30 ℃, leads to nitrogen 30min.Taking 0.1g potassium peroxydisulfate and 0.1g sodium bisulfite is dissolved in respectively and in 50g distilled water, makes 0.2wt% solution, respectively get 2.5g and join in previous reaction system, continue temperature control at 30 ℃, keep logical nitrogen, after reaction 6h, obtain transparent, gel bittern pipeline drag reducer.Take this gel friction-reducing additive 6g (being equivalent to 1g straight polymer) and be dissolved in the simulation bittern of 20 ℃ of 50L water temperatures, sodium chloride content 150g/L, under the condition of Re=32000, when the drag reducing efficiency that records synthetic friction-reducing additive is 49%, 50 ℃, drag reducing efficiency is 37%.
Drag reducing efficiency test and result:
Drag reducing efficiency test loop path as shown in Figure 1, is read the pressure difference that adds agent front and back by pressure gauge 2,3, calculate the drag reducing efficiency of friction-reducing additive according to following formula.
As can be seen from Figure 2, under this experimental condition, when friction-reducing additive addition is 20ppm, the drag reducing efficiency of SPAM and P (AM/AMPS) is respectively 39% and 49%, and under similarity condition, PAM is only 32%, thereby friction-reducing additive SPAM provided by the invention and its resistance reducing performance of P (AM/AMPS) are significantly better than PAM.As shown in Figure 3, along with salinity increases, the drag reducing efficiency of SPAM and P (AM/AMPS) slowly evenly declines, and PAM first drops sharply to lower numerical value and then slow decreasing, show that friction-reducing additive SPAM provided by the invention and P (AM/AMPS) are not too responsive to salt, salt resistant character is obviously better than PAM.As shown in Figure 4, along with temperature raises, the drag reducing efficiency of SPAM and P (AM/AMPS) slowly evenly declines, and fall is less, and the drag reducing efficiency of PAM declines by a big margin.When temperature 50 C, the drag reducing efficiency of SPAM and P (AM/AMPS) is respectively 33% and 37%, and under similarity condition, the drag reducing efficiency of PAM is only 17%, shows that friction-reducing additive SPAM provided by the invention and its heat resistance of P (AM/AMPS) are significantly better than PAM.
Claims (4)
1. a method for brine pipeline road flow resistance is adopted in reduction, it is characterized in that, to bittern, through the water-soluble friction-reducing additive that adds heatproof, salt tolerant in brine pipeline road of adopting after electric submersible pump, can reduce the flow resistance of adopting brine pipeline road.
2. the method for brine pipeline road flow resistance is adopted in a kind of reduction according to claim 1, it is characterized in that, the water-soluble friction-reducing additive of described heatproof, salt tolerant is sulfomethylation polyacrylamide or poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid).
3. the method for brine pipeline road flow resistance is adopted in a kind of reduction according to claim 1, it is characterized in that, and described sulfomethylation polyacrylamide or poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid), its mean molecule quantity is all greater than 3,000,000.
4. the method for brine pipeline road flow resistance is adopted in a kind of reduction according to claim 1, it is characterized in that, and described sulfomethylation polyacrylamide or poly-(acrylamide/2-acrylamide-2-methylpro panesulfonic acid), its addition is 10-50ppm.
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| CN201410264397.5A CN104019087A (en) | 2014-06-13 | 2014-06-13 | Method for reducing flow resistance of halogen collecting and conveying pipeline |
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| CN201410264397.5A CN104019087A (en) | 2014-06-13 | 2014-06-13 | Method for reducing flow resistance of halogen collecting and conveying pipeline |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105037621A (en) * | 2015-07-20 | 2015-11-11 | 山东大学 | Modified brine drag reduction agent and preparation method thereof |
| CN106391597A (en) * | 2016-10-21 | 2017-02-15 | 淮安信息职业技术学院 | Online non-production-halt cleaning process for brine transportation pipeline |
| CN107152399A (en) * | 2017-05-31 | 2017-09-12 | 中国矿业大学 | A kind of method that use polymer drag reducing agent improves gas drainage under suction liquid-ring vacuum pump |
| CN107152400A (en) * | 2017-07-10 | 2017-09-12 | 中国矿业大学 | A kind of closed circulation system for improving gas drainage under suction the way |
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| US4560710A (en) * | 1985-01-02 | 1985-12-24 | Exxon Research And Engineering Co. | Drag reduction agent |
| CN101121883A (en) * | 2007-07-31 | 2008-02-13 | 中国石油天然气股份有限公司 | Water soluble friction reducer used for thick oil well and preparation method thereof |
| CN102060312A (en) * | 2010-11-15 | 2011-05-18 | 江苏井神盐化股份有限公司 | Method and device for preventing bittern delivery pipeline from scaling |
| CN103588224A (en) * | 2013-11-22 | 2014-02-19 | 山东大学 | Method for reducing grain size of sodium chloride in brine |
| CN103627380A (en) * | 2013-11-08 | 2014-03-12 | 中国石油天然气股份有限公司 | Water-soluble drag reducer as well as preparation method and application thereof |
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2014
- 2014-06-13 CN CN201410264397.5A patent/CN104019087A/en active Pending
Patent Citations (5)
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| US4560710A (en) * | 1985-01-02 | 1985-12-24 | Exxon Research And Engineering Co. | Drag reduction agent |
| CN101121883A (en) * | 2007-07-31 | 2008-02-13 | 中国石油天然气股份有限公司 | Water soluble friction reducer used for thick oil well and preparation method thereof |
| CN102060312A (en) * | 2010-11-15 | 2011-05-18 | 江苏井神盐化股份有限公司 | Method and device for preventing bittern delivery pipeline from scaling |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105037621A (en) * | 2015-07-20 | 2015-11-11 | 山东大学 | Modified brine drag reduction agent and preparation method thereof |
| CN106391597A (en) * | 2016-10-21 | 2017-02-15 | 淮安信息职业技术学院 | Online non-production-halt cleaning process for brine transportation pipeline |
| CN106391597B (en) * | 2016-10-21 | 2019-06-28 | 淮安信息职业技术学院 | Halogen transportation pipeline does not stop production cleaning process online |
| CN107152399A (en) * | 2017-05-31 | 2017-09-12 | 中国矿业大学 | A kind of method that use polymer drag reducing agent improves gas drainage under suction liquid-ring vacuum pump |
| CN107152400A (en) * | 2017-07-10 | 2017-09-12 | 中国矿业大学 | A kind of closed circulation system for improving gas drainage under suction the way |
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