CN102854294A - System used for detecting water quality standard in oilfield superheated steam injection technology, and its method - Google Patents
System used for detecting water quality standard in oilfield superheated steam injection technology, and its method Download PDFInfo
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- CN102854294A CN102854294A CN2011103145494A CN201110314549A CN102854294A CN 102854294 A CN102854294 A CN 102854294A CN 2011103145494 A CN2011103145494 A CN 2011103145494A CN 201110314549 A CN201110314549 A CN 201110314549A CN 102854294 A CN102854294 A CN 102854294A
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Abstract
The invention discloses a system used for detecting the water quality standard in an oilfield superheated steam injection technology, and its method. The system comprises a steam generator, a steam-water separator, a flash device, a smoke heat exchanger, an evaporation processor and a water distribution tank. The system used for detecting the water quality standard in the oilfield superheated steam injection technology and its method disclosed in the embodiments of the invention enable onsite test researches to be carried out, steam drum furnace water quality standards determined through indoor tests to be verified and adjusted, and the water quality standard of the steam drug furnace industry to be made, and provides bases for the design, the manufacturing, the safe operation and the production management of the steam drug furnaces. The system and the method have the advantages of suitableness for practical onsite oilfield conditions, easy realization, and convenient practical operation; and energy saving, water saving and efficiency improvement can be realized through utilizing the smoke waste heat and the high-temperature steam generated in a recycle system as a supply heat source of the evaporation processor.
Description
Technical field
The present invention relates to oil extraction in oil field technology field, relate in particular to thickened oil recovery Above Ground Technology field, is a kind of system and method for detection of water quality standard in the superheated steam injection technique of oil field concretely.
Background technology
Viscous crude, the particularly exploitation of special viscous crude and super viscous crude field, main mining type are steam stimulation, steam flood and SAGD (steam assisted gravity drainage, SAGD) etc.But the ultimate recovery factor of steam stimulation only has about 25%, and the vapour driving oil recovery yield is relatively high can about 60%, to be the Technology of Heavy Oil Recovery early, but also to be subject to some condition restriction.SAGD be heavy crude producing up-to-date than mature technology, also obtained fast industrialization promotion, this surpasses half for world's remaining reserves is the future of viscous crude, the SAGD technology has great development space.Implement one of technology of SAGD heavy crude producing most critical, will produce lower-cost superheated vapor on ground exactly, otherwise exploitation is uneconomic.
The main method that produces superheated vapor is to want supporting fabulous water desalination technology, produces superheated vapor with drum boiler.This respect power plant has than proven technique, generally adopts ion exchange technique to carry out desalination.But power plant uses recirculated water, and the demineralized water of a undertreatment 10% is as the circulation supplementing water, and actual ton water cost is lower.And the stratum will be injected with each ton demineralized water in the oil field, and its cost is much higher than power plant.But the superheated vapor that the oil field produces does not enter steam turbine power generation, but enters oil reservoir, therefore requires the steam of low saline salinity unlike steam turbine, and the oil field does not require the steam salt content that enters oil reservoir, only need consider in process of production the security of drum boiler.
In the technique of existing generation oil field superheated steam injection, enter safe operation and production management that water quality quality in the drum boiler directly has influence on drum boiler, such as whether fouling etc. of drum boiler.Therefore, determining that rational oil field drum boiler water quality standard and efficient process for preparing water have become the technical bottleneck of industrialization promotion, is a problem demanding prompt solution.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of system and method for detection of water quality standard in the superheated steam injection technique of oil field, be used for to solve prior art and can't determine water quality quality (standard) in the drum boiler, thereby may cause drum boiler to move unsafe problem.
In order to achieve the above object, the embodiment of the invention provides a kind of system for detection of water quality standard in the superheated steam injection technique of oil field, comprising: steam generator, for generation of wet steam; Steam-water separator connects described steam generator, is used for described wet steam is separated into high-temperature steam and high-temperature water; Flash evaporator connects described steam-water separator, is used for that the high-temperature water that described steam-water separator produces is carried out the step-down flash distillation and processes, and generates flash-off steam and flash distillation high-temperature water; Flue gas heat-exchange unit is used for outside water is heated, and generates water in the high temperature; The evaporation process device connects described flash evaporator and described flue gas heat-exchange unit, is used for the flash distillation high-temperature water of described flash evaporator generation and the high temperature water of described flue gas heat-exchange unit generation are carried out evaporation process, generates pure water; The water distribution tank connects described evaporation process device, is used for pure water and outside water that described evaporation process device generates are carried out proportioning, generates proportioning water, returns to described steam generator, whether meets technological requirement to detect water quality.
In order to achieve the above object, the embodiment of the invention also provides a kind of method for detection of water quality standard in the superheated steam injection technique of oil field, comprising: utilize steam generator to produce wet steam; Described wet steam is separated into high-temperature steam and high-temperature water; Described high-temperature water is carried out the step-down flash distillation process, generate flash-off steam and flash distillation high-temperature water; To water heating in the outside, generate water in the high temperature; Water in described flash distillation high-temperature water and the described high temperature is carried out evaporation process, generate pure water; Water in described pure water and the outside is carried out proportioning, generate proportioning water, return to described steam generator, whether meet technological requirement to detect water quality.
The system and method for detection of water quality standard in the superheated steam injection technique of oil field of the embodiment of the invention, set up the multi-functional medium-term system of a SAGD surface technology, can carry out site test research, and can verify, adjust the drum boiler water quality standard that shop experiment is determined, formulate the oil field with drum boiler industry water quality standard, for design, manufacturing, safe operation and the production management of drum boiler provides foundation; The embodiment of the invention is fit to the Oil Field physical condition, easily realizes, is convenient to practical operation; And the technology such as the hot tube heat exchanger that adopts, evaporation water treatment technology, flash evaporation technology, steam-water separator, superheater realize that difficulty is relatively low, and strong operability is invested littlely, can reduce investment risk and technical risk.And the fume afterheat that produces by recycling system and high-temperature steam can be realized energy-saving and water-saving, raise the efficiency as the supplemental heat source of evaporation process device.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those skilled in the art, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation for detection of the system of water quality standard in the superheated steam injection technique of oil field of the embodiment of the invention;
Fig. 2 is that the present invention is for detection of the structural representation of another embodiment of the system of water quality standard in the superheated steam injection technique of oil field;
Fig. 3 is that the present invention is for detection of the method flow diagram of an embodiment of the method for water quality standard in the superheated steam injection technique of oil field.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the structural representation for detection of the system of water quality standard in the superheated steam injection technique of oil field of the embodiment of the invention.As shown in the figure, the system for detection of water quality standard in the superheated steam injection technique of oil field of the present embodiment comprises:
In the present embodiment, steam generator 101 can adopt existing 23t/h wet saturated steam producing boiler, becomes small-sized superheated steam generator after the improvement; Described steam-water separator 102 sends back to described steam generator 101 with the high-temperature steam that produces and carries out post bake, generates superheated vapor, is injected into the oil field, carries out the exploitation of viscous crude.
In the present embodiment, water can simultaneously as the thermal source of described steam treatment device 101, effectively utilize fume afterheat and Separation of Water waste heat in the high temperature that the flash-off steam that described flash evaporator 103 generates and described flue gas heat-exchange unit 104 generate.After proportioning water in the described water distribution tank 106 returns to described steam generator 101, according to the fouled condition of described steam generator 101, detect whether meet the technique water quality standard.The evaporation water treatment technology take heat energy as power is adopted in water treatment of the present invention, such as multiple-effect falling film evaporation generator.
Fig. 2 is that the present invention is for detection of the structural representation of another embodiment of the system of water quality standard in the superheated steam injection technique of oil field.The present embodiment is similar to the described embodiment of Fig. 1:
Steam generator is for generation of wet steam;
Steam-water separator connects described steam generator, be used for wet steam is separated into high-temperature steam and high-temperature water, steam-water separator sends back to described steam generator with the high-temperature steam that produces and carries out post bake, generates superheated vapor, be injected into the oil field, carry out the exploitation of viscous crude;
Flash evaporator connects described steam-water separator, is used for that the high-temperature water that described steam-water separator produces is carried out the step-down flash distillation and processes, and generates flash-off steam and flash distillation high-temperature water;
Flue gas heat-exchange unit is used for outside water is heated, and generates water in the high temperature, and wherein, flue gas heat-exchange unit also is connected with steam generator, and the high-temperature steam with in the fume afterheat heating steam generator generates superheated vapor, carries out taking full advantage of of fume afterheat;
The evaporation process device connects described flash evaporator and described flue gas heat-exchange unit, is used for the flash distillation high-temperature water of described flash evaporator generation and the high temperature water of described flue gas heat-exchange unit generation are carried out evaporation process, generates pure water; Water can simultaneously as the thermal source of described steam treatment device, effectively utilize fume afterheat and Separation of Water waste heat in the high temperature that the flash-off steam that described flash evaporator generates and described flue gas heat-exchange unit generate.
The water distribution tank connects described evaporation process device, is used for pure water and outside water that described evaporation process device generates are carried out proportioning, generates proportioning water, returns to described steam generator, whether meets the technique water quality standard to detect.After proportioning water in the described water distribution tank returns to described steam generator, according to the fouled condition of described steam generator, detect whether meet the technique water quality standard.
Fig. 3 be the present invention for detection of the method flow diagram of an embodiment of the method for water quality standard in the superheated steam injection technique of oil field, as shown in the figure, the method for detection of water quality standard in the superheated steam injection technique of oil field of the present embodiment comprises:
Step S101 utilizes steam generator to produce wet steam;
Step S102 is separated into high-temperature steam and high-temperature water with described wet steam.Wherein, described wet steam is separated into high-temperature steam and high-temperature water after, described high-temperature steam is sent back to described steam generator carries out post bake, generate superheated vapor, be injected into the oil field.
Step S103 carries out the step-down flash distillation with described high-temperature water and processes, and generates flash-off steam and flash distillation high-temperature water;
Step S104 to water heating in the outside, generates water in the high temperature;
Step S105 carries out evaporation process with water in described flash distillation high-temperature water and the described high temperature, generates pure water.Simultaneously, the processing thermal source of the described pure water of simultaneously conduct generation of water in described flash-off steam and the described high temperature.
Step S106 carries out proportioning with water in described pure water and the outside, generates proportioning water, returns to described steam generator, whether meets the technique water quality standard to detect.After described proportioning water returns to described steam generator, according to the fouled condition of described steam generator, detect water quality and whether meet technological requirement.
The system and method for detection of water quality standard in the superheated steam injection technique of oil field of the embodiment of the invention, set up the multi-functional medium-term system of a SAGD surface technology, can carry out site test research, and can verify, adjust the drum boiler water quality standard that shop experiment is determined, formulate the oil field with drum boiler industry water quality standard, for design, manufacturing, safe operation and the production management of drum boiler provides foundation; The embodiment of the invention is fit to the Oil Field physical condition, easily realizes, is convenient to practical operation; And the technology such as the hot tube heat exchanger that adopts, evaporation water treatment technology, flash evaporation technology, steam-water separator, superheater realize that difficulty is relatively low, and strong operability is invested littlely, can reduce investment risk and technical risk.And the fume afterheat that produces by recycling system and high-temperature steam can be realized energy-saving and water-saving, raise the efficiency as the supplemental heat source of evaporation process device.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; the protection domain that is not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the system for detection of water quality standard in the superheated steam injection technique of oil field is characterized in that, described system comprises:
Steam generator is for generation of wet steam;
Steam-water separator connects described steam generator, is used for described wet steam is separated into high-temperature steam and high-temperature water;
Flash evaporator connects described steam-water separator, is used for that the high-temperature water that described steam-water separator produces is carried out the step-down flash distillation and processes, and generates flash-off steam and flash distillation high-temperature water;
Flue gas heat-exchange unit is used for outside water is heated, and generates water in the high temperature;
The evaporation process device connects described flash evaporator and described flue gas heat-exchange unit, is used for the flash distillation high-temperature water of described flash evaporator generation and the high temperature water of described flue gas heat-exchange unit generation are carried out evaporation process, generates pure water;
The water distribution tank connects described evaporation process device, is used for pure water and outside water that described evaporation process device generates are carried out proportioning, generates proportioning water, returns to described steam generator, whether meets the technique water quality standard to detect.
2. the system for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 1 is characterized in that, the high-temperature steam that described steam-water separator produces sends back to described steam generator and carries out post bake, generates superheated vapor, is injected into the oil field.
3. the system for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 1 is characterized in that, the flash-off steam that described flash evaporator generates is as the thermal source of described steam treatment device.
4. the system for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 1 is characterized in that, the water while is as the thermal source of described steam treatment device in the high temperature that described flue gas heat-exchange unit generates.
5. the system for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 1, it is characterized in that, after proportioning water in the described water distribution tank returns to described steam generator, according to the fouled condition of described steam generator, detect whether meet the technique water quality standard.
6. the method for detection of water quality standard in the superheated steam injection technique of oil field is characterized in that, described method comprises:
Utilize steam generator to produce wet steam;
Described wet steam is separated into high-temperature steam and high-temperature water;
Described high-temperature water is carried out the step-down flash distillation process, generate flash-off steam and flash distillation high-temperature water;
To water heating in the outside, generate water in the high temperature;
Water in described flash distillation high-temperature water and the described high temperature is carried out evaporation process, generate pure water;
Water in described pure water and the outside is carried out proportioning, generate proportioning water, return to described steam generator, whether meet the technique water quality standard to detect.
7. the method for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 6, it is characterized in that, after described wet steam is separated into high-temperature steam and high-temperature water, described high-temperature steam is sent back to described steam generator carry out post bake, generate superheated vapor, be injected into the oil field.
8. the method for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 6 is characterized in that, described flash-off steam is as the processing thermal source that generates described pure water.
9. the method for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 6 is characterized in that, water is simultaneously as the processing thermal source that generates described pure water in the described high temperature.
10. the method for detection of water quality standard in the superheated steam injection technique of oil field as claimed in claim 6, it is characterized in that, after described proportioning water returns to described steam generator, according to the fouled condition of described steam generator, detect whether meet the technique water quality standard.
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| CN201110314549.4A CN102854294B (en) | 2011-10-17 | 2011-10-17 | For detecting the system and method for water quality standard in the superheated steam injection technique of oil field |
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| CN201110314549.4A CN102854294B (en) | 2011-10-17 | 2011-10-17 | For detecting the system and method for water quality standard in the superheated steam injection technique of oil field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915653A (en) * | 2018-06-20 | 2018-11-30 | 中国石油天然气集团有限公司 | Oil field gas injection steam generating system and method |
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| CN201999758U (en) * | 2011-03-31 | 2011-10-05 | 中国石油天然气股份有限公司 | Steam-assisted gravity drainage (SAGD) wet steam injection station system |
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| WO2009105309A1 (en) * | 2008-02-21 | 2009-08-27 | Exxonmobil Upstream Research Company | Method and system for generating steam in the oil industry |
| CN201196411Y (en) * | 2008-07-04 | 2009-02-18 | 中国石油天然气第八建设有限公司 | Overheating steam-filling boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108915653A (en) * | 2018-06-20 | 2018-11-30 | 中国石油天然气集团有限公司 | Oil field gas injection steam generating system and method |
| CN108915653B (en) * | 2018-06-20 | 2021-01-29 | 中国石油天然气集团有限公司 | Steam generation system and method for oil field steam injection |
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