CN108049853B - Super heavy oil recovery method and super heavy oil recovery system - Google Patents
Super heavy oil recovery method and super heavy oil recovery system Download PDFInfo
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- CN108049853B CN108049853B CN201711284545.XA CN201711284545A CN108049853B CN 108049853 B CN108049853 B CN 108049853B CN 201711284545 A CN201711284545 A CN 201711284545A CN 108049853 B CN108049853 B CN 108049853B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G57/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one cracking process or refining process and at least one other conversion process
Abstract
The invention discloses a method for exploiting super heavy oil, which comprises the following steps: injecting a diluting medium for diluting the super heavy oil into the bottom of an oil well, and diluting and reducing the viscosity of the super heavy oil; distilling the mixed liquid produced by the oil well; and (3) back-mixing the extracted diluting medium in the distillation treatment process into the oil well to perform viscosity reduction exploitation on the thick oil shaft, and outputting the thick oil subjected to dilution medium extraction after thermal cracking modification. According to the method and the system for exploiting the oil gas of the super-thick oil, the diluting medium is circularly injected into the oil well of the super-thick oil, then the mixed liquid of the diluting medium and the super-thick oil is exploited again, and the mixed liquid is separated and classified, so that the diluting medium is recycled while the super-thick oil is exploited, and the viscosity reduction exploitation of a deep super-thick oil shaft is realized. The super heavy oil and gas exploitation method can meet the requirement of integration of lifting and conveying of super heavy oil, and greatly improves production efficiency. The invention also discloses an ultra-heavy oil and gas exploitation system.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to an ultra-thick oil exploitation method and an ultra-thick oil exploitation system.
Background
Petroleum plays a very important role in the operation of a country as a strategic resource for the operation of the country. China's manufacturing industry is developed, and the operation of industrial and military equipment requires a large amount of petroleum resources as a foundation. China has rich heavy oil reserves in ultra-deep wells, but the exploitation difficulty is high.
At present, many oil extraction processes are developed at home and abroad, such as a steam injection exploitation process, a thin oil-doped viscosity reduction process, a heating viscosity reduction process, an emulsification viscosity reduction process doped with a high-efficiency water-soluble viscosity reducer, and the like. However, due to the difference of the locality, the processes adopted by different oil field blocks are different. The yield of the deep thickened oil in China accounts for about 57 percent of the total yield, the thin oil blending viscosity reduction process is mainly used at present, but the development of the thin oil blending viscosity reduction process is limited along with the reduction of thin oil resources, and an efficient and economic thickened oil recovery process is urgently needed. The thick oil emulsification viscosity reduction and electric heating viscosity reduction technology has the advantages of high viscosity reduction rate, improved pump efficiency, simple and convenient operation and the like, but the viscosity recovery is large after demulsification, dehydration and temperature reduction, so that the lifting and conveying integration is difficult to meet, and the large-range application cannot be realized all the time.
Disclosure of Invention
Therefore, the invention provides the ultra-thick oil exploitation method and the ultra-thick oil exploitation system which are efficient and economical and can greatly improve the recovery ratio, so as to solve the problems in the prior art.
According to a first aspect of the present invention, there is provided an ultra heavy oil recovery method comprising:
injecting a diluting medium for diluting the super heavy oil into the bottom of an oil well, and diluting and reducing the viscosity of the super heavy oil;
distilling the mixed liquid produced by the oil well;
and the diluting medium extracted in the distillation treatment process is back mixed into the oil well to carry out viscosity reduction and exploitation on the thick oil shaft, and the thick oil after the diluting medium is extracted is subjected to thermal cracking modification and then is transported out.
Preferably, the distillation treatment of the mixed liquor produced by the oil well comprises:
firstly, dehydrating a mixed solution produced by an oil well;
carrying out heat exchange on the dehydrated mixed solution and the extracted diluting medium after distillation and heating;
preheating the mixed solution after heat exchange and temperature rise to a preset temperature;
and carrying out distillation reaction on the preheated mixed solution.
Preferably, the distillation treatment of the mixed liquid produced by the oil well is carried out by adopting distillation equipment, and the thermal cracking modification of the thick oil after the dilution medium is extracted is carried out by adopting a viscosity reduction reactor,
and the distillation equipment and the top gas generated at the top of the viscosity reduction reactor are fuel gas, the mixed liquid after heat exchange and temperature rise is preheated, and the fuel gas is utilized to preheat when the mixed liquid is preheated to a preset temperature.
Preferably, the back-blending the dilution medium extracted in the distillation treatment process into an oil well for viscosity reduction production of a thick oil well bore comprises the following steps:
carrying out primary heat exchange and temperature reduction on the diluted medium extracted by distillation and the mixed solution produced by the oil well;
and carrying out secondary heat exchange and temperature reduction on the diluted medium subjected to the primary heat exchange and temperature reduction and the thick oil subjected to thermal cracking and modification and output.
Preferably, the outputting the thick oil after the thick oil is extracted from the diluting medium after the thick oil is subjected to thermal cracking modification comprises the following steps:
exchanging heat between the thickened oil after the dilution medium is extracted and the thickened oil after thermal cracking modification, and heating;
carrying out thermal cracking modification reaction for a preset time;
wherein, the thickened oil after thermal cracking modification is cooled and transported out after heat exchange, and the thickened oil after heat exchange and temperature rise is heated.
Preferably, the distillation treatment of the mixed liquid produced by the oil well is carried out by adopting distillation equipment, and the thermal cracking modification of the thick oil after the dilution medium is extracted is carried out by adopting a viscosity reduction reactor,
and top gas generated at the tops of the distillation equipment and the viscosity reduction reactor is used as fuel gas, and the fuel gas is utilized for preheating when the thickened oil after the dilution medium is extracted and the thickened oil after thermal cracking modification are subjected to heat exchange and temperature rise.
Preferably, the preset time period is 30-90 minutes.
Preferably, the diluting medium is at least one of heavy diesel oil, aromatic-rich distillate oil, naphthenic oil and hydrogenated tail oil.
According to a second aspect of the present invention, there is provided an ultra heavy oil recovery system comprising a distillation apparatus, a visbreaking reactor, a first heat exchanger, a second heat exchanger, and a third heat exchanger,
the inlet ends of the first group of fluid ports of the first heat exchanger are used for being communicated with a production wellhead, the outlet ends of the first group of fluid ports of the first heat exchanger are communicated with the inlet of the distillation equipment,
the first outlet of the distillation equipment is arranged at the upper part of the distillation equipment and is communicated with the inlet of the second group of fluid ports of the first heat exchanger, the outlet of the second group of fluid ports of the first heat exchanger is communicated with the inlet of the first group of fluid ports of the third heat exchanger, the outlet of the first group of fluid ports of the third heat exchanger is communicated with the oil well, the second outlet of the distillation equipment is arranged at the bottom part of the distillation equipment and is communicated with the inlet of the first group of fluid ports of the second heat exchanger, the outlet of the first group of fluid ports of the second heat exchanger is communicated with the inlet of the viscosity reduction reactor, the first outlet of the viscosity reduction reactor is arranged on the upper side wall of the viscosity reduction reactor, the first outlet is communicated with the inlet of the second group of fluid ports of the second heat exchanger, and the outlet of the second group of fluid ports of the second heat exchanger is communicated with the inlet of the second group of fluid ports of the third heat exchanger, and outlets of the second group of fluid ports of the third heat exchanger are used for outputting the thickened oil after viscosity reduction.
Preferably, the device also comprises a first heating furnace and a second heating furnace,
the outlets of the first group of fluid ports of the first heat exchanger are communicated with the inlet of the distillation device through the first heating furnace,
the outlets of the first group of fluid ports of the second heat exchanger are communicated with the inlet of the viscosity reduction reactor through the second heating furnace,
the third outlet of the distillation equipment is arranged at the top of the distillation equipment, the second outlet of the viscosity reduction reactor is arranged at the top of the distillation equipment, and the third outlet of the distillation equipment and the second outlet of the viscosity reduction reactor are respectively communicated with the fuel supply ports of the first heating furnace and the second heating furnace.
According to the method and the system for exploiting the oil gas of the ultra-thick oil, provided by the invention, the diluting medium is circularly injected into the oil well of the ultra-thick oil, then the mixed liquid of the diluting medium and the ultra-thick oil is exploited again, and the mixed liquid is separated and classified, so that the recycling of the diluting medium is realized while the ultra-thick oil exploitation is realized, and the viscosity reduction exploitation of a deep ultra-thick oil well shaft is realized. The super heavy oil and gas exploitation method and the system can meet the requirement of integration of lifting and conveying of super heavy oil, can realize large-range application, greatly improve the production efficiency while realizing low-cost operation, and improve the exploitation success rate and the exploitation amount of the super heavy oil.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 shows a schematic configuration diagram of an ultra-thick oil recovery system according to an embodiment of the present invention.
Fig. 2 shows a flow diagram of an ultra-heavy oil recovery method according to an embodiment of the invention.
In the figure: the system comprises a medium storage tank 1, a thin oil mixing injection pump 2, an oil extraction wellhead 3, an oil extraction pipe column 4, a dehydration tank 5, a mixed liquid lifting pump 6, a first heat exchanger 7, a first heating furnace 8, a distillation device 9, a thick oil lifting pump 10, a second heat exchanger 11, a second heating furnace 12, a viscosity reduction reactor 13, an oil well mixing pipeline 14, an oil well production pipeline 15, a medium extraction pipeline 16, a thick oil conveying pipeline 17, a viscosity reduction thick oil conveying pipeline 18, a fuel gas conveying pipeline 19 and a third heat exchanger 20.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Fig. 1 shows a schematic configuration diagram of an ultra-thick oil recovery system according to an embodiment of the present invention. As shown in fig. 1, the ultra-heavy oil recovery system includes a distillation apparatus 9, a viscosity reduction reactor 13, a first heat exchanger 7, a second heat exchanger 11, and a third heat exchanger 20. The inlet end of the first set of fluid ports of the first heat exchanger 7 is adapted to communicate with the production wellhead 3, and the outlet end is in communication with the inlet of the distillation apparatus 9. A first outlet of the distillation apparatus 9 is provided on the upper side thereof, which first outlet communicates with the inlet of the second set of fluid ports of the first heat exchanger 7 via a medium extraction line 16, the outlet of the second set of fluid ports of the first heat exchanger 7 being adapted to communicate with the inlet of the first set of fluid ports of the third heat exchanger 20, the outlet of the first set of fluid ports of the third heat exchanger 20 being adapted to communicate with the well. The second outlet of the distillation device 9 is located at the bottom thereof, and is communicated with the inlets of the first group of fluid ports of the second heat exchanger 11, the outlets of the first group of fluid ports of the second heat exchanger 11 are communicated with the inlets of the viscosity reduction reactor 13, the first outlet of the viscosity reduction reactor 13 is located on the upper side wall thereof, and is communicated with the inlets of the second group of fluid ports of the second heat exchanger 11, the outlets of the second group of fluid ports of the second heat exchanger 11 are communicated with the inlets of the second group of fluid ports of the third heat exchanger 20 through a viscosity reduction heavy oil conveying pipeline 1817, and the outlets of the second group of fluid ports of the third heat exchanger 20 can be communicated with an oil product storage device, such as an oil tank and the like, for conveying out the viscosity reduced heavy oil.
In this example, the distillation apparatus 9 is selected as a distillation column or a flash column. The corresponding components are communicated through pipelines.
Further, the super heavy oil recovery system also comprises a first heating furnace 8 and a second heating furnace 12, and the outlets of the first group of fluid ports of the first heat exchanger 7 are communicated with the inlet of the distillation equipment 9 through the first heating furnace 8. The outlets of the first set of fluid ports of the second heat exchanger 11 communicate with the inlet of the visbreaking reactor 13 via the second furnace 12. A third outlet of the distillation apparatus 9 is provided at the top thereof and is communicated with the fuel supply ports of the first heating furnace and the second heating furnace, respectively, via a fuel gas delivery line 19. A second outlet of the visbreaking reactor 13 is provided at the top thereof and is in communication with the fuel supply ports of the first and second furnaces 8 and 12, respectively, via a fuel gas transfer line 19.
The super heavy oil recovery system further comprises a dewatering tank 5, a mixed liquid lifting pump 6, a medium storage tank 1, a thin mixing injection pump 2 and a heavy oil lifting pump 10. The inlet of the dewatering tank 5 is communicated with the oil extraction well mouth 3 through an oil well output pipeline 15, the outlet of the dewatering tank is communicated with the inlet of the mixed liquid lifting pump 6 through a pipeline, and the outlet of the mixed liquid lifting pump 6 is communicated with the inlet of the first group of fluid ports of the first heat exchange pump through a pipeline. The inlet of the medium storage tank 1 is communicated with the outlet of the second group of fluid ports of the first heat exchanger 7 through a pipeline, the outlet of the second group of fluid ports of the first heat exchanger 7 is communicated with the inlet of the diluting injection pump 2 through a pipeline, and the outlet of the diluting injection pump 2 is communicated with the inlet of the first group of fluid ports of the third heat exchanger 20 through a pipe well oil well infiltration pipeline. The inlet of the thick oil lift pump 10 is communicated with the second outlet of the distillation device 9 through a thick oil conveying pipeline 17.
Fig. 2 shows a flow diagram of an ultra-heavy oil recovery method according to an embodiment of the invention. As shown in fig. 2, the super heavy oil recovery method in recovery using the super heavy oil recovery includes the following three steps:
s01), injecting a diluting medium for diluting the super-heavy oil into the bottom of the oil well, and diluting and reducing the viscosity of the super-heavy oil;
s02), distilling the mixed liquid produced by the oil well;
s03), the diluting medium extracted in the distillation treatment process is back mixed into an oil well to carry out viscosity reduction and exploitation on a thick oil shaft, and the thick oil after the diluting medium is extracted is subjected to thermal cracking modification and then is transported out.
The three steps are described in more detail below:
the dilution medium in the medium reservoir 1 is first diluted in a 0.2: 1-0.8:1, pressurizing to 0-15 MPa by a dilution injection pump 2, penetrating into a pipeline along an oil well, heating to 50-70 ℃ at a third heat exchanger 20, conveying to the vicinity of an oil extraction well head 3, injecting into a well bottom from an oil jacket annulus of the oil extraction well head 3, mixing with thick oil at the well bottom, diluting and reducing viscosity along an oil extraction pipe column 4, and then producing the ground from a production gate of the oil extraction well head 3.
The mixed solution of the diluting medium and the thickened oil enters a dehydration tank 5 along an oil well output pipeline 15 for dehydration until the water content is less than 0.5 percent, and the dehydrated mixed oil is preheated to 100-130 ℃ in a first heat exchanger 7 after being pressurized by a mixed solution lift pump 6, enters a first heating furnace 8 for heating, and the heating temperature is 330-350 ℃. After the temperature is raised, the diluent medium and the thick oil mixed oil enter a distillation device 9, a distillation section where the diluent medium is extracted is evaporated according to the property of the diluent medium, the temperature of the distillation section is reduced to below 70 ℃ through a medium extraction pipeline 16 and heat exchange is carried out between the distillation section and the diluent medium thick oil mixed liquid in a first heat exchanger 7, the distillation section enters a medium storage tank 1 through the medium extraction pipeline 16, and the next round of well entering dilution thick oil is subjected to dilution and viscosity reduction and recycling.
The heavy distillate oil after the dilution medium is extracted from the bottom of the distillation equipment 9 is pressurized in a thick oil conveying pipeline 17 through a thick oil lifting pump 10, then heat exchange is carried out between the heavy distillate oil and the high-temperature visbreaking thick oil in a visbreaking thick oil pipeline in a second heat exchanger 11 to 350-370 ℃, the heavy distillate oil after the heat exchange enters a second heating furnace 12, is heated to 390-410 ℃, further enters a reactor from an inlet at the bottom of a thermal modification visbreaking reactor 13, stays for reaction for 30-90min in the thermal modification visbreaking reactor 13, enters a visbreaking thick oil pipeline from the upper part of the thermal modification visbreaking reactor 13, is conveyed to the second heat exchanger 11, exchanges heat with the heavy distillate oil before the thermal modification visbreaking in the thick oil conveying pipeline 17 to reduce the temperature to 350-370 ℃, is further conveyed to a third heat exchanger 20 along the visbreaking thick oil pipeline, exchanges heat with the mixed solution of the dilution medium thick oil in an oil well production pipeline 15 to reduce the temperature to 70-80, entering an external oil transportation storage tank for external transportation and sale.
The top gases of the distillation equipment 9 and the thermal upgrading viscosity reduction reactor 13 enter a fuel gas conveying pipeline 19 after being collected, and are respectively conveyed to the first heating furnace 8 and the second heating furnace 12 after being distributed to be used as fuel gases to be combusted and converted into heat energy.
The super heavy oil recovery method will be described in detail below by referring to examples one and two.
The first embodiment is as follows:
heavy diesel oil is selected as a diluting medium, and mixed with thickened oil with the viscosity of 530000mPa.s at 50 ℃ according to the mass ratio of 0.75:1 of the diluting medium to reduce the viscosity, so that the viscosity of the mixed liquid is reduced to 2013 mPa.s, and the requirements of lifting and pipeline transportation are met. The obtained diluted thick oil mixed oil is pressurized by a mixed liquid lifting pump 6, preheated to 109 ℃ in a first heat exchanger 7, and enters a first heating furnace 8 for heating, wherein the heating temperature is 350 ℃. After the temperature is raised, the mixed oil enters a distillation device 9, the distillation section at the temperature of 250-350 ℃ where the dilution medium is extracted is evaporated, 123% of the dilution medium is recovered, and the requirement of recycling is met. The heavy distillate oil after the diluent is extracted from the bottom of the distillation equipment 9 is subjected to heat exchange and heating, the temperature reaches 390 ℃, the heavy distillate oil stays in the thermal modification viscosity-reduction reactor 13 for reaction for 80min, the viscosity is 377mPa.s/70 ℃ before entering an external oil transportation storage tank, and the external transportation requirement is met.
Example two:
naphthenic oil is selected as a diluting medium, and the naphthenic oil and the thick oil with the viscosity of 780000mPa.s at 50 ℃ are mixed and subjected to viscosity reduction according to the mass ratio of the diluting medium to the thick oil of 0.95:1, so that the viscosity of a mixed solution is reduced to 1835mP.s, and the requirements of lifting and pipeline transportation are met. The obtained diluted thick oil mixed oil is pressurized by a mixed liquid lifting pump 6, preheated to 109 ℃ in a first heat exchanger 7, and enters a first heating furnace 8 for heating, wherein the heating temperature is 350 ℃. After the temperature is raised, the mixed oil enters a distillation device 9, the distillation section at the temperature of 160-350 ℃ where the dilution medium is extracted is evaporated, and 118% of the dilution medium is recovered, so that the requirement of recycling is met. The heavy distillate oil after the diluent is extracted from the bottom of the distillation equipment 9 is subjected to heat exchange and heating, the temperature reaches 400 ℃, the heavy distillate oil stays in the thermal modification viscosity-reduction reactor 13 for reaction for 60min, the viscosity is 532mPa.s/70 ℃ before entering an external oil transportation storage tank, and the external transportation requirement is met.
According to the method and the system for exploiting the oil gas of the super-thick oil, the diluting medium is circularly injected into the oil well of the super-thick oil, then the mixed liquid of the diluting medium and the super-thick oil is exploited again, and the mixed liquid is separated and classified, so that the diluting medium is recycled while the super-thick oil is exploited, and the viscosity reduction exploitation of a deep super-thick oil shaft is realized. The super heavy oil and gas exploitation method and the system can meet the requirement of integration of lifting and conveying of super heavy oil, can realize large-range application, greatly improve the production efficiency while realizing low-cost operation, and improve the exploitation success rate and the exploitation amount of the super heavy oil.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A method for producing ultra-thick oil, comprising:
injecting a diluting medium for diluting the super heavy oil into the bottom of an oil well, and diluting and reducing the viscosity of the super heavy oil;
distilling the mixed liquid produced by the oil well;
carrying out primary heat exchange and temperature reduction on the diluted medium extracted by distillation and the mixed solution produced by the oil well; carrying out thermal cracking modification on the thick oil after the diluent medium is extracted for a preset time; exchanging heat between the thickened oil after the dilution medium is extracted and the thickened oil after thermal cracking modification, and heating; carrying out secondary heat exchange and temperature reduction on the diluted medium subjected to the primary heat exchange and temperature reduction and the heavy oil subjected to thermal cracking and modification and then outputting;
and taking top gas generated in the distillation treatment and thermal cracking modification processes as fuel gas, and utilizing the fuel gas for preheating when the thickened oil after the dilution medium is extracted and the thickened oil after thermal cracking modification are subjected to heat exchange and temperature rise.
2. A method for recovering ultra-thick oil as claimed in claim 1, wherein said subjecting the mixed liquor produced by the oil well to distillation treatment comprises:
firstly, dehydrating a mixed solution produced by an oil well;
carrying out heat exchange on the dehydrated mixed solution and the extracted diluting medium after distillation and heating;
preheating the mixed solution after heat exchange and temperature rise to a preset temperature;
and carrying out distillation reaction on the preheated mixed solution.
3. A method for producing extra heavy oil according to claim 2, wherein the mixed liquid produced from the oil well is distilled by a distillation apparatus, and the heavy oil from which the diluting medium has been extracted is thermally cracked and upgraded by a visbreaking reactor,
and the distillation equipment and the top gas generated at the top of the viscosity reduction reactor are fuel gas, the mixed liquid after heat exchange and temperature rise is preheated, and the fuel gas is utilized to preheat when the mixed liquid is preheated to a preset temperature.
4. The ultra thick oil recovery method as claimed in claim 1, wherein the preset time period is 30-90 minutes.
5. A method for producing extra heavy oil as claimed in any one of claims 1 to 4, wherein the diluent medium is at least one selected from the group consisting of heavy diesel oil, aromatic-rich distillate oil, naphthenic oil and hydrogenated tail oil.
6. A super heavy oil recovery system is characterized by comprising distillation equipment, a viscosity reduction reactor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first heating furnace and a second heating furnace,
the inlet ends of the first group of fluid ports of the first heat exchanger are used for being communicated with a production wellhead, the outlet ends of the first group of fluid ports of the first heat exchanger are communicated with the inlet of the distillation equipment,
the first outlet of the distillation equipment is arranged on the side wall of the upper part of the distillation equipment, the first outlet is communicated with the inlet of the second group of fluid ports of the first heat exchanger, the outlet of the second group of fluid ports of the first heat exchanger is communicated with the inlet of the first group of fluid ports of the third heat exchanger, the outlet of the first group of fluid ports of the third heat exchanger is communicated with the oil well, the second outlet of the distillation equipment is positioned at the bottom of the distillation equipment, the second outlet is communicated with the inlet of the first group of fluid ports of the second heat exchanger, the outlet of the first group of fluid ports of the second heat exchanger is communicated with the inlet of the viscosity reduction reactor, the first outlet of the viscosity reduction reactor is positioned on the side wall of the upper part of the distillation equipment, the first outlet is communicated with the inlet of the second group of fluid ports of the second heat exchanger, and the outlet of the second group of fluid ports of the second heat exchanger is communicated with the inlet of the second group of fluid ports of the third heat, outlets of a second group of fluid ports of the third heat exchanger are used for outputting the thickened oil subjected to viscosity reduction;
the outlets of the first group of fluid ports of the first heat exchanger are communicated with the inlet of the distillation device through the first heating furnace,
the outlets of the first group of fluid ports of the second heat exchanger are communicated with the inlet of the viscosity reduction reactor through the second heating furnace,
a third outlet of the distillation equipment is arranged at the top of the distillation equipment and is respectively communicated with the fuel supply ports of the first heating furnace and the second heating furnace,
and a second outlet of the viscosity reduction reactor is arranged at the top of the viscosity reduction reactor, and the second outlet is respectively communicated with the fuel supply ports of the first heating furnace and the second heating furnace.
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| US7691788B2 (en) * | 2006-06-26 | 2010-04-06 | Schlumberger Technology Corporation | Compositions and methods of using same in producing heavy oil and bitumen |
| CN101649734B (en) * | 2009-09-09 | 2013-05-29 | 西南石油大学 | Method for integrally catalyzing, reforming, reducing viscosity, extracting and transporting thick oil |
| CN102654047B (en) * | 2011-03-03 | 2015-08-26 | 中国石油化工股份有限公司 | A kind of method of thick oil hydrothermal integrally catalyzing, reforming, reducing viscosity, extracting and transporting |
| CN102116144A (en) * | 2011-03-08 | 2011-07-06 | 西南石油大学 | Integrated method for thin oil blending, viscosity reduction, extraction and transportation of thickened oil |
| US20130045902A1 (en) * | 2011-08-16 | 2013-02-21 | Todd Matthew Thompson | Composition and method for recovering heavy oil |
| CN103032056B (en) * | 2012-12-13 | 2016-04-20 | 中国石油化工股份有限公司 | A kind of method and apparatus being applicable to the viscosity reducing of super heavy oil recovery |
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