CN104266175B - Oil field gas injection overheated boiler overheating steam desalter and using method thereof - Google Patents
Oil field gas injection overheated boiler overheating steam desalter and using method thereof Download PDFInfo
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- CN104266175B CN104266175B CN201410517996.3A CN201410517996A CN104266175B CN 104266175 B CN104266175 B CN 104266175B CN 201410517996 A CN201410517996 A CN 201410517996A CN 104266175 B CN104266175 B CN 104266175B
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Abstract
<b> the present invention relates to oil field gas injection superheated steam treating apparatus, be a kind of oil field gas injection overheated boiler overheating steam desalter and using method thereof, the overheated boiler overheating steam desalter </b><bGreatT.Gre aT.GT of this oil field gas injection comprises overheated boiler, one-level steam-water separator, heat exchanger and secondary steam-water separator; The water inlet of overheated boiler is installed with demineralized water water-supply line, between the delivery port of the radiant section of overheated boiler and the import of one-level steam-water separator, is installed with the first wet saturated steam pipeline.Reasonable and compact in structure of the present invention, easy to use, by introducing two-stage steam-water separator, the salinity in superheated steam can be removed significantly, salt rejection rate reaches 80% to 95%, avoid salinity crystallization entrained by superheated steam to result in blockage to steam injection pipeline, down-hole string and oil well pump, oil reservoir, and adopt the present invention can reach energy-saving and cost-reducing object further.</b>
Description
Technical field
the present invention relates to oil field gas injection superheated steam treating apparatus, is a kind of oil field gas injection overheated boiler overheating steam desalter and using method thereof.
Background technology
in order to improve the producing capacity of viscous crude further, oilfield exploitation starts the overheated boiler of oil field gas injection that comes into operation.So improve the recovery ratio that steam enthalpy improves crude oil, but also create new problem.This is because overheated boiler feedwater is demineralized water, containing certain salinity, this part dissolving salt can be separated out as crystal salt in the production and use procedure of superheated steam, finally can to boiler mixing machine, steam injection pipeline, down-hole string and oil well pump even oil reservoir cause certain blocking, great negative effect is produced, so the desalination of oil field gas injection overheated boiler overheating steam has very important meaning to boiler safety production and oil extraction.The production method of current superheated steam be by the wet saturated steam out of the radiant section by overheated boiler after steam-water separator isolates dry saturated steam and saturation water, saturation water enters mixing machine, the superheat section that dry saturated steam enters overheated boiler is heated into superheated steam, then superheated steam enters the superheated steam that mixing machine and saturation water be mixed into low overheat and injects oil reservoir through steam injection pipeline, although the method effectively produces superheated steam, but the salinity in superheated steam does not reduce, will inevitably to boiler mixing machine, steam injection pipeline, down-hole string and oil well pump even oil reservoir cause certain blocking.
Summary of the invention
the invention provides a kind of oil field gas injection overheated boiler overheating steam desalter and using method thereof, overcome the deficiency of above-mentioned prior art, it effectively can solve and process the undiminished problem of rear salinity to overheated boiler superheated steam out at present.
one of technical scheme of the present invention is realized by following measures: the overheated boiler overheating steam desalter of a kind of oil field gas injection, comprises overheated boiler, one-level steam-water separator, heat exchanger and secondary steam-water separator, the water inlet of overheated boiler is installed with demineralized water water-supply line, the first wet saturated steam pipeline is installed with between the delivery port of the radiant section of overheated boiler and the import of one-level steam-water separator, the first dry saturated steam pipeline is installed with between the gas vent of one-level steam-water separator and the superheat section steam inlet of overheated boiler, superheated steam pipeline is installed with between the superheat section steam (vapor) outlet of overheated boiler and the tube side import of heat exchanger, saturation water pipeline is installed with between the liquid outlet of one-level steam-water separator and the shell side import of heat exchanger, the tube side outlet of heat exchanger is installed with steam injection pipeline, the second wet saturated steam pipeline is installed with between the shell-side outlet of heat exchanger and the import of secondary steam-water separator, the second dry saturated steam pipeline is installed with between the gas vent and steam injection pipeline of secondary steam-water separator, the liquid outlet of secondary steam-water separator is installed with concentrated salt solution pipeline.
here is the further optimization and/or improvements to one of foregoing invention technical scheme:
above-mentionedly on demineralized water water-supply line, be installed with demineralized water heat exchanger, demineralized water water-supply line is connected with the shell side of demineralized water heat exchanger, be fixedly installed togather between the other end of concentrated salt solution pipeline and the tube side import of demineralized water heat exchanger, the tube side outlet of demineralized water heat exchanger is installed with flowing line.
two of technical scheme of the present invention is realized by following measures: a kind of oil field gas injection using method of overheated boiler overheating steam desalter, carry out in the steps below: the first step, first enter one-level steam-water separator by the first wet saturated steam pipeline by the radiant section wet saturated steam out of overheated boiler and carry out carbonated drink separation, after the process of one-level steam-water separator, obtain dry saturated steam and saturation water; Second step, entered the shell side of heat exchanger through supersaturation water pipeline by one-level steam-water separator saturation water out, after the first dry saturated steam pipeline enters the superheat section of overheated boiler, form superheated steam by one-level steam-water separator dry saturated steam out, superheated steam enters steam injection pipeline after superheated steam pipeline enters the tube side of heat exchanger and saturation water carries out heat exchange; 3rd step, after heat exchange, enter secondary steam-water separator by heat exchanger shell pass wet saturated steam out through the second wet saturated steam pipeline carry out carbonated drink separation, dry saturated steam and concentrated salt solution is obtained after the process of secondary steam-water separator, enter steam injection pipeline by secondary steam-water separator dry saturated steam out and be mixed into steam injection superheated steam by heat exchanger superheated steam out, last steam injection superheated steam injects oil reservoir through steam injection pipeline by steam injection pipe network.
reasonable and compact in structure of the present invention, easy to use, by introducing two-stage steam-water separator, the salinity in superheated steam can be removed significantly, salt rejection rate reaches 80% to 95%, avoid salinity crystallization entrained by superheated steam to result in blockage to steam injection pipeline, down-hole string and oil well pump, oil reservoir, and adopt the present invention can reach energy-saving and cost-reducing object further.
Accompanying drawing explanation
accompanying drawing 1 is the process structure schematic diagram of preferred embodiment.
coding in accompanying drawing is respectively: 1 is overheated boiler, and 2 is demineralized water water-supply line, and 3 is one-level steam-water separator, 4 is the first wet saturated steam pipeline, and 5 is the first dry saturated steam pipeline, and 6 is heat exchanger, 7 is superheated steam pipeline, and 8 is saturation water pipeline, and 9 is steam injection pipeline, 10 is secondary steam-water separator, 11 is the second wet saturated steam pipeline, and 12 for there being the second dry saturated steam pipeline, and 13 is concentrated salt solution pipeline, 14 is demineralized water heat exchanger, and 15 is flowing line.
Detailed description of the invention
the present invention by the restriction of following embodiment, can not determine concrete embodiment according to technical scheme of the present invention and actual conditions.
in invention, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of upper and lower, left and right etc. determines according to the Butut direction of Figure of description.
below in conjunction with embodiment and accompanying drawing, the invention will be further described:
embodiment 1, as shown in Figure 1, the overheated boiler overheating steam desalter of this oil field gas injection comprises overheated boiler 1, one-level steam-water separator 3, heat exchanger 6 and secondary steam-water separator 10, the water inlet of overheated boiler 1 is installed with demineralized water water-supply line 2, the first wet saturated steam pipeline 4 is installed with between the radiant section delivery port of overheated boiler 1 and the import of one-level steam-water separator 3, the first dry saturated steam pipeline 5 is installed with between the gas vent of one-level steam-water separator 3 and the superheat section steam inlet of overheated boiler 1, superheated steam pipeline 7 is installed with between the superheat section steam (vapor) outlet of overheated boiler 1 and the tube side import of heat exchanger 6, saturation water pipeline 8 is installed with between the liquid outlet of one-level steam-water separator 3 and the shell side import of heat exchanger 6, the tube side outlet of heat exchanger 6 is installed with steam injection pipeline 9, the second wet saturated steam pipeline 11 is installed with between the shell-side outlet of heat exchanger 6 and the import of secondary steam-water separator 10, the second dry saturated steam pipeline 12 is installed with between the gas vent and steam injection pipeline 9 of secondary steam-water separator 10, the liquid outlet of secondary steam-water separator 10 is installed with concentrated salt solution pipeline 13.
embodiment 2, preferred as embodiment 1, as shown in Figure 1, demineralized water water-supply line 2 is installed with demineralized water heat exchanger 14, demineralized water water-supply line 2 is connected with the shell side of demineralized water heat exchanger 14, be fixedly installed togather between the other end of concentrated salt solution pipeline 13 and the tube side import of demineralized water heat exchanger 14, the tube side outlet of demineralized water heat exchanger 14 is installed with flowing line 15.From secondary steam-water separator 10 concentrated salt solution out with certain heat, after this part heat and demineralized water heat-shift are carried out heat recovery, then its reclaimed or carries out crystallisation solidification process, reaching energy-saving and cost-reducing object further.
embodiment 3, this oil field gas injection using method of overheated boiler overheating steam desalter, carry out in the steps below: the first step, first enter one-level steam-water separator by the first wet saturated steam pipeline by the radiant section wet saturated steam out of overheated boiler and carry out carbonated drink separation, after the process of one-level steam-water separator, obtain dry saturated steam and saturation water; Second step, entered the shell side of heat exchanger through supersaturation water pipeline by one-level steam-water separator saturation water out, after the first dry saturated steam pipeline enters the superheat section of overheated boiler, form superheated steam by one-level steam-water separator dry saturated steam out, superheated steam enters steam injection pipeline after superheated steam pipeline enters the tube side of heat exchanger and saturation water carries out heat exchange; 3rd step, after heat exchange, enter secondary steam-water separator by heat exchanger shell pass wet saturated steam out through the second wet saturated steam pipeline carry out carbonated drink separation, dry saturated steam and concentrated salt solution is obtained after the process of secondary steam-water separator, enter steam injection pipeline by secondary steam-water separator dry saturated steam out and be mixed into steam injection superheated steam by heat exchanger superheated steam out, last steam injection superheated steam injects oil reservoir through steam injection pipeline by steam injection pipe network.
adopt the overheated boiler overheating steam desalter of oil field gas injection of the present invention by a heat exchange, twice separation, the salt rejection rate of the superheated steam of injection oil reservoir is made to reach 80% to 95%, because after secondary steam-water separator 10 is separated, be stripped of the salt content of wet saturated steam significantly, the corresponding salt content just decreasing the superheated steam injecting oil reservoir, therefore, employing the present invention can remove the salinity in superheated steam significantly, salt rejection rate reaches 80% to 95%, avoid salinity crystallization entrained by superheated steam to steam injection pipeline 9, down-hole string and oil well pump, oil reservoir results in blockage, higher salt content and heat is contained by secondary steam-water separator 10 concentrated salt solution out, can recycle concentrated salt solution and heat thereof, reach energy-saving and cost-reducing object.
the present invention can remove the salinity in superheated steam significantly, and salt rejection rate reaches 80% to 95%, avoids superheated steam to result in blockage to steam injection pipeline, down-hole string and oil well pump, oil reservoir, and adopts the present invention can reach energy-saving and cost-reducing object further.
above technical characteristic constitutes most preferred embodiment of the present invention, and it has stronger adaptability and best implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (3)
1. the overheated boiler overheating steam desalter of oil field gas injection, is characterized in that comprising overheated boiler, one-level steam-water separator, heat exchanger and secondary steam-water separator, the water inlet of overheated boiler is installed with demineralized water water-supply line, the first wet saturated steam pipeline is installed with between the delivery port of the radiant section of overheated boiler and the import of one-level steam-water separator, the first dry saturated steam pipeline is installed with between the gas vent of one-level steam-water separator and the superheat section steam inlet of overheated boiler, superheated steam pipeline is installed with between the superheat section steam (vapor) outlet of overheated boiler and the tube side import of heat exchanger, saturation water pipeline is installed with between the liquid outlet of one-level steam-water separator and the shell side import of heat exchanger, the tube side outlet of heat exchanger is installed with steam injection pipeline, the second wet saturated steam pipeline is installed with between the shell-side outlet of heat exchanger and the import of secondary steam-water separator, the second dry saturated steam pipeline is installed with between the gas vent and steam injection pipeline of secondary steam-water separator, the liquid outlet of secondary steam-water separator is installed with concentrated salt solution pipeline.
2. the overheated boiler overheating steam desalter of oil field gas injection according to claim 1, it is characterized in that being installed with demineralized water heat exchanger on demineralized water water-supply line, demineralized water water-supply line is connected with the shell side of demineralized water heat exchanger, be fixedly installed togather between the other end of concentrated salt solution pipeline and the tube side import of demineralized water heat exchanger, the tube side outlet of demineralized water heat exchanger is installed with flowing line.
3. an oil field gas injection according to claim 1 and 2 using method of overheated boiler overheating steam desalter, it is characterized in that carrying out in the steps below: the first step, first enter one-level steam-water separator by the first wet saturated steam pipeline by the radiant section wet saturated steam out of overheated boiler and carry out carbonated drink separation, after the process of one-level steam-water separator, obtain dry saturated steam and saturation water; Second step, entered the shell side of heat exchanger through supersaturation water pipeline by one-level steam-water separator saturation water out, after the first dry saturated steam pipeline enters the superheat section of overheated boiler, form superheated steam by one-level steam-water separator dry saturated steam out, superheated steam enters steam injection pipeline after superheated steam pipeline enters the tube side of heat exchanger and saturation water carries out heat exchange; 3rd step, after heat exchange, enter secondary steam-water separator by heat exchanger shell pass wet saturated steam out through the second wet saturated steam pipeline carry out carbonated drink separation, dry saturated steam and concentrated salt solution is obtained after the process of secondary steam-water separator, enter steam injection pipeline by secondary steam-water separator dry saturated steam out and be mixed into steam injection superheated steam by heat exchanger superheated steam out, last steam injection superheated steam injects oil reservoir through steam injection pipeline by steam injection pipe network.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105423333A (en) * | 2015-11-10 | 2016-03-23 | 辽宁石油化工大学 | High-temperature oxygen-enrichment type steam-injection boiler |
| CN105222123A (en) * | 2015-11-10 | 2016-01-06 | 辽宁石油化工大学 | A kind of high-temperature oxygen-enriched formula overheat steam injection boiler |
| CN106705108A (en) * | 2016-12-29 | 2017-05-24 | 辽宁石油化工大学 | High-temperature flue gas oxygen-doped type oxygen-enriched combustion steam-injection boiler |
| CN106705109A (en) * | 2016-12-29 | 2017-05-24 | 辽宁石油化工大学 | High-temperature flue gas oxygen-doped type superheated steam injection boiler |
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| JPS5551904A (en) * | 1978-10-06 | 1980-04-16 | Hitachi Zosen Corp | Steam plant for submarine oil field |
| CN101140061A (en) * | 2007-10-26 | 2008-03-12 | 中国石油天然气第八建设有限公司 | Subcritical pressure pouring boiler furnace |
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| CN204127941U (en) * | 2014-09-30 | 2015-01-28 | 张宏伟 | The overheated boiler overheating steam desalter of oil field gas injection |
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| US8631871B2 (en) * | 2009-07-27 | 2014-01-21 | Innovative Steam Technologies Inc. | System and method for enhanced oil recovery with a once-through steam generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5551904A (en) * | 1978-10-06 | 1980-04-16 | Hitachi Zosen Corp | Steam plant for submarine oil field |
| CN101140061A (en) * | 2007-10-26 | 2008-03-12 | 中国石油天然气第八建设有限公司 | Subcritical pressure pouring boiler furnace |
| CN101343989A (en) * | 2008-08-22 | 2009-01-14 | 新疆石油管理局机械制造总公司 | High-dryness oil field steam-injection boiler and high-dryness steam production method |
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