CN109915082A - A kind of device and method for exploiting Offshore Heavy Oil Field oil reservoir - Google Patents
A kind of device and method for exploiting Offshore Heavy Oil Field oil reservoir Download PDFInfo
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- CN109915082A CN109915082A CN201910182976.8A CN201910182976A CN109915082A CN 109915082 A CN109915082 A CN 109915082A CN 201910182976 A CN201910182976 A CN 201910182976A CN 109915082 A CN109915082 A CN 109915082A
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Abstract
A kind of device and method for exploiting Offshore Heavy Oil Field oil reservoir.Mainly for solving the problems, such as that highly energy-consuming existing in the prior art, high pollution, Flooding Efficiency difference and development cost are high.The present invention is converted into vapor displacement heavy crude reservoir using the GEOTHERMAL WATER of deep earth heart water layer, injection is recycled using the GEOTHERMAL WATER of deep earth heart water layer, extend the heavy crude reservoir exploitation period, vapor is converted for the GEOTHERMAL WATER in deep earth heart water layer using downhole steam generator, the heat loss generated when avoiding water vapour long distance transmission, separated water-bearing crude oil out is separated again using second level downhole separation system, improves oil-water separation.The present invention is by the produced-water reinjection of output to deep earth heart water layer, form recycling for GEOTHERMAL WATER, avoid the sewage effluent into ocean, be it is a kind of efficiently, environmental protection and a new approach can be provided with the new method of large scale mining Offshore Heavy Oil Field oil reservoir for the suitable development of Offshore Heavy Oil Field oil reservoir.
Description
Technical field
The present invention relates to the quarrying apparatus and method of a kind of Offshore Heavy Oil Field oil reservoir, belong to exploitation technology of heavy reservoir neck
Domain.
Background technique
Viscous crude resource is extremely abundant in the world, and viscous crude occupies about 70% specific gravity, and most of viscous crude in World's Oil and Gas Resources
Oil pool distribution is in sea.Though viscosity of thickened oil is high, extremely sensitive to temperature, every to increase by 10 DEG C, viscosity declines about half, viscous crude
The regularity of heating, viscosity reducing is consistent, this is also the dominant mechanism of heavy crude heat extraction.Steam drive is current heavy industrialization
The heavy crude heat extraction technology of application, after heavy crude reservoir passes through steam displacement, overall recovery efficiency is up to 55%.Steam, which drives, improves exploitation effect
Mechanism mainly have steam distillation effect, gas drive effect, original place dissolution, heating viscosity reduction effect.
Land viscous oil field operated by steam Simulation on whole pay zones technology has tended to be mature, but due to by ocean engineering, development cost,
The factors such as production facility and safety and environmental protection restrict, and there are certain particularity for offshore viscous oil field exploitation, cannot indiscriminately imitate land completely
The mature technology in ground oil field.When heavy crude reservoir steam injection displacement, the water resource largely with its oil reservoir compatibility is needed, Offshore Heavy Oil Field
When exploitation, sea water desalination needs a large amount of equipment investment, and energy consumption is huge.In addition, when heavy crude reservoir is through excessive round displacement
Into after high water-cut stage, the lifting of output water, storage and processing difficulty are increased, and water treatment facilities investment and operating cost are with production water
The increase of amount and be continuously increased, Partial flats machine utilization is unable to satisfy increasing water process amount requirement, exploits comprehensive warp
Ji benefit is sharply deteriorated, and some oil wells prematurely may stop production or discard.In addition, output sewage is at sea during platform processes
Many negative effects are brought to environment, while increasing the pressure of offshore oilfield energy-saving and emission-reduction.
Summary of the invention
In order to solve the technical problems mentioned in the background art, the present invention provides a kind of exploitation Offshore Heavy Oil Field oil reservoirs
Device and method, the present invention recycle to exploit Offshore Heavy Oil Field oil reservoir using deep formation water, have efficient, environmental protection and realize big
The characteristics of scale production of heavy oil reservoir, provides a new approach for the suitable development of Offshore Heavy Oil Field oil reservoir
The technical scheme is that the device of the exploitation Offshore Heavy Oil Field oil reservoir, including by single-well injection-production well and water filling well group
At multiple wells group, the quantity of the injection-production well and water injection well is at least each a bite.
It is unique in that: the single-well injection-production well includes single-well injection-production casing, oil pipe and the first water injection pipe,
Well head is connected with the oil pipe of petroleum pipeline and is connected with axial direction of first water injection pipe along single-well injection-production casing of water-supply-pipe in well head
In parallel, it and is distributed in single-well injection-production casing；Screw pump, second level are from top to bottom successively equipped with along well head in oil pipe
Downhole separation system and level-one downhole separation system, wherein the liquid flow inlet and second level downhole separation system of screw pump
Oil mutually outlet is connected, the screw pump is used to the oil that second level downhole separation system is separated giving rise to ground；One
Mutually outlet is connected the oil of grade downhole separation system with the liquid phase entrance of second level downhole separation system, level-one downhole oil moisture
Water phase outlet from device is connected with re-injection pipe, and the water phase outlet of second level downhole separation system is also connected with re-injection pipe,
On re-injection pipe, it is located between two water phase outlet connections, is connected with pressure regulator valve；Re-injection is connected in the outlet end of re-injection pipe
It pumps, the produced-water reinjection for re-injection pipe to be discharged to undersea stratum.
The water injection well includes water filling casing, the second water injection pipe, distributor, downhole steam generator and pulsating pump.
Wherein, distributor, downhole steam generator and pulsating pump are connected on the second water injection pipe；The pulsating pump is for by deep
The second water injection pipe is pumped into GEOTHERMAL WATER in hot water layer, the downhole steam generator is used for the GEOTHERMAL WATER in the second water injection pipe
It is converted into vapor, the distributor is used for the vapor metaideophone in the second water injection pipe into Heavy Oil Reservoir.
Utilize the method for aforementioned device exploitation Offshore Heavy Oil Field oil reservoir, comprising the following steps:
The device for exploiting Offshore Heavy Oil Field oil reservoir is arranged in the production district with Heavy Oil Reservoir and deep earth heart water layer by the first step,
Wherein, single-well injection-production well and water injection well are symmetrically distributed in two opposite sides of production district, are formed by single-well injection-production well and water injection well
The well group of composition；Wherein, after water injection well drill-through Heavy Oil Reservoir, need to continue to extend to deep earth heart of the water temperature at 45 DEG C or more
Water layer；The tripping in single-well injection-production casing in boring procedure injects well cementing of cement, in Heavy Oil Reservoir and deep earth heart water layer well section
Perforation completion.
Second step will be pumped into the second water injection pipe using the pulsating pump in water injection well in the GEOTHERMAL WATER in deep earth heart water layer,
GEOTHERMAL WATER is converted into vapor through downhole steam generator, and after vapor enters distributor, metaideophone is into Heavy Oil Reservoir.
Third step infuses the vapor into Heavy Oil Reservoir for self-contained energy transmission to Heavy Oil Reservoir, viscous crude is made to heat up,
Viscous crude viscosity of crude is reduced, the viscous crude being heated distills out light hydrocarbon components, with water vapour by viscous crude in situ to same-well injection
The displacement of the direction Cai Jing；After vapor transfers energy to Heavy Oil Reservoir, own temperature is reduced to boiling point hereinafter, forming high warm
Water.
4th step, the drain that displacement goes out in Heavy Oil Reservoir enter the level-one downhole separation system in single-well injection-production well, point
Low viscous crude is separated out, the low viscous crude isolated is again separate out viscous crude through second level downhole separation system, and screw pump will separate
Viscous crude out is lifted to ground；The sewage that level-one downhole separation system, second level downhole separation system are isolated is pumped through re-injection
Pressurization is recycled into former deep earth heart water layer to avoid ground surface environment pollution.
Preferably, seawater can be injected into deep earth heart water layer through the first water injection pipe in single-well injection-production well, for supplementing
Deep earth heart water layer energy, and sufficiently employ GEOTHERMAL WATER in situ.
In addition, in the first step, it can be after the drill-through Heavy Oil Reservoir section perforation completion of single-well injection-production well, using sand-proof pipe
Sand control, and gravel filling is carried out, sand gear will be produced in Heavy Oil Reservoir.
The invention has the following beneficial effects: firstly, the present invention is converted into water steaming using the GEOTHERMAL WATER of deep earth heart water layer
Gas drive replaces heavy crude reservoir, avoids the equipment investment of sea water desalination, has saved the energy；Secondly, present invention employs deep earth hearts
The recovery method of the GEOTHERMAL WATER circulation injection of water layer, can extend the heavy crude reservoir exploitation period, improve the extraction journey of heavy crude reservoir
Degree enters high water-cut stage after solving the more round displacements of heavy crude reservoir, and offshore platform equipment load is unable to satisfy increasing
The prior art problem that sewage treatment requires；Again, the present invention considers the conventional steam injection displacement of reservoir oil, and underground long distance line passes
A large amount of wellbore heat loss of defeated steam generation, and converted the GEOTHERMAL WATER in deep earth heart water layer to using downhole steam generator
Vapor, the heat loss generated when avoiding water vapour long distance transmission；In addition, the present invention uses second level downhole separation system
Separated water-bearing crude oil out is separated again, improves oil-water separation.
The present invention considers the loss of the deep earth heart water layer energy generated when deep earth heart water layer circulation note adopts viscous crude,
Seawater is injected into deep earth heart water layer, the energy supplemented with deep earth heart water layer is sufficiently employed in situ in deep earth heart water layer
GEOTHERMAL WATER.The produced-water reinjection of output to deep earth heart water layer is formed recycling for GEOTHERMAL WATER by the present invention, is avoided to ocean
Middle sewage effluent, be it is a kind of efficiently, environmental protection can be with the new method of large scale mining Offshore Heavy Oil Field oil reservoir.
Detailed description of the invention:
Fig. 1 is the composition schematic diagram of device of the present invention, which illustrates the working principle of the method for the invention simultaneously；
Fig. 2 is the enlarged drawing of two-stage oil water separator part in single-well injection-production well in device of the present invention；
Fig. 3 is the structural schematic diagram of downhole steam generator part in water injection well in device of the present invention.
In figure: 1- petroleum pipeline, 2- water-supply-pipe, the first water injection pipe of 3-, 4- single-well injection-production casing, 5- screw pump, 6- oil
Pipe, 7- second level downhole separation system, 8- pressure regulator valve, 9- level-one downhole separation system, 10- re-injection pipe, 11- packer, 12-
Re-injection pump, the second water injection pipe of 13-, 14- fill the water casing, 15- distributor, 16- downhole steam generator, 17- pulsating pump.
Specific embodiment:
The present invention will be further explained below with reference to the attached drawings:
As shown in Fig. 1 to Fig. 3, the device of this kind of exploitation Offshore Heavy Oil Field oil reservoir, including by single-well injection-production well and water filling well construction
The quantity of multiple wells group, the injection-production well and water injection well is at least each a bite；
It is unique in that: the single-well injection-production well includes single-well injection-production casing 4, oil pipe 6 and the first water injection pipe 3,
Well head is connected with the oil pipe 6 of petroleum pipeline 1 and is connected with the first water injection pipe 3 of water-supply-pipe 2 along single-well injection-production casing 4 in well head
It is axial parallel, and be distributed in single-well injection-production casing 4；Screw rod is from top to bottom successively equipped with along well head in oil pipe 6
Pump 4, second level downhole separation system 7 and level-one downhole separation system 9.Wherein, the liquid flow inlet of screw pump 4 and second level underground
Mutually outlet is connected the oil of oil water separator 7, and the screw pump 4 is used for the oil for separating second level downhole separation system 7
Give rise to ground；Mutually outlet is connected the oil of level-one downhole separation system 9 with the liquid phase entrance of second level downhole separation system 7
It connects, the water phase outlet of level-one downhole separation system 9 is connected with re-injection pipe 11, and the water phase of second level downhole separation system 7 goes out
Mouth is also connected with re-injection pipe 11, on re-injection pipe 11, is located between two water phase outlet connections, is connected with pressure regulator valve 8；?
The outlet end of re-injection pipe 11 is connected with re-injection pump 12, the produced-water reinjection for re-injection pipe 11 to be discharged to undersea stratum.
The water injection well include water filling casing 14, the second water injection pipe 13, distributor 15, downhole steam generator 16 and
Pulsating pump 17.Wherein, distributor 15, downhole steam generator 16 and pulsating pump 17 are connected on the second water injection pipe 13；It is described
For pulsating pump for will be pumped into the second water injection pipe 13 in the GEOTHERMAL WATER in deep earth heart water layer, the downhole steam generator is used for will
GEOTHERMAL WATER in second water injection pipe 13 is converted into vapor, and the distributor is used for the vapor metaideophone in the second water injection pipe 13
Into Heavy Oil Reservoir.
When it is implemented, two-stage downhole separation system can use downhole rotational-flow formula oil water separator, to adapt to sea
The big feature of Heavy Oil Reservoir output lifting rate.Downhole rotational-flow formula oil water separator is by stages such as water conservancy diversion, eddy flow, current stabilization, water removals
By in drain viscous crude and sewage separation.Downhole separation system (the Vortoil type underground of Vortoil company, U.S. exploitation
Oil water separator), it is a kind of hydrocyclone, by centrifugal action of the liquid in cyclone, separates two kinds of oil and water not
With the liquid of density.Although the diameter of downhole separation system is smaller, length is longer, has good water-oil separating energy
Power.Screw pump can be used cooperatively using two electric submersible pumps with downhole separation system with re-injection pump.Downhole steam generator can
To use high-pressure combustion direct heating type downhole steam generator, 250 DEG C of steam 24cm is produced per minute3.It is additionally mounted at
Perforated interval, the C- type that the downhole packer between casing and oil pipe can select Baker company to produce have the resistance to heat-sealing of flap valve valve
Every device.
When the method for the invention is implemented, firstly, determining the depth below Offshore Heavy Oil Field oil reservoir according to production district geologic report
Portion's underground heat water layer is arranging single-well injection-production well and water injection well with the production district of Heavy Oil Reservoir and deep earth heart water layer, formed by
Two mouthfuls or multiple wells group of single-well injection-production well and water filling well construction；Water injection well is bored using drilling equipment, when the drill-through viscous crude of water injection well
After oil reservoir, continue to extend to deep earth heart water layer of the water temperature at 45 DEG C or more, the tripping in single-well injection-production casing in boring procedure,
Well cementing of cement is injected, in Heavy Oil Reservoir and deep earth heart water layer well section perforation completion；Drilling equipment is recycled to bore single-well injection-production
Well continues the deep earth heart water layer for extending to the same layer pierced with water injection well, is boring after single-well injection-production well drill-through Heavy Oil Reservoir
Tripping in fills the water casing during hole, well cementing of cement is injected, in Heavy Oil Reservoir and deep earth heart water layer well section perforation completion；Using
Pulsating pump will be pumped into the second water injection pipe in the GEOTHERMAL WATER in deep earth heart water layer, GEOTHERMAL WATER is converted into water through downhole steam generator
Steam, after vapor enters distributor, metaideophone is into Heavy Oil Reservoir, the heat loss generated when avoiding water vapour long distance transmission.
Self-contained energy transmission to Heavy Oil Reservoir, is made viscous crude heat up by vapor, is reduced viscous crude viscosity of crude, is added
The viscous crude of heat distills out light hydrocarbon components, and with water vapour by viscous crude in situ to the direction displacement of single-well injection-production well, formation is mixed
It mutually drives and improves displacement efficiency；After vapor transfers energy to Heavy Oil Reservoir, own temperature is reduced to boiling point hereinafter, being formed high
Warm water；High-temperature-hot-water further decreases viscosity of thickened oil, improves viscous crude mobility ratio, increases Heavy Oil Reservoir expansion energy, is improving
While drainage capacity, crude oil not will form " the oily band " of high oil saturation in seepage channel, so as to avoid blocking
Phenomenon；
To avoid deep earth heart water layer from exporting the energy loss of GEOTHERMAL WATER formation for a long time, water-supply-pipe 2 is by seawater through single-well injection-production well
In the first water injection pipe inject deep earth heart water layer, supplement deep earth heart water layer energy, and sufficiently employ GEOTHERMAL WATER in situ；It is thick
The drain that displacement goes out in oil reservoir enters level-one downhole separation system 9, isolates low viscous crude, the low viscous crude warp isolated
Second level downhole separation system 7 is again separate out viscous crude, is reduced to 2% to divide hereinafter, improving grease the moisture content of low viscous crude
From effect, the viscous crude isolated is lifted to ground by screw pump 5, then is transported to storage tank farm through petroleum pipeline 1；Second level oil water separator
7 sewage isolated are mixed through pressure regulator valve 8 with the sewage that second level oil water separator 7 is isolated, and mixed sewage is through re-injection pump 17
Pressurization, is recycled into deep earth heart water layer, ground surface environment is avoided to pollute.
To avoid blocking of shaking out caused by Heavy Oil Reservoir production for a long time, oil recovery efficiency is reduced, single-well injection-production well is drill-through
After Heavy Oil Reservoir section perforation completion, using sand-proof pipe sand control, and gravel filling is carried out, sand gear will be produced in Heavy Oil Reservoir.Level-one well
Lower oil water separator, second level downhole separation system use downhole rotational-flow formula oil water separator, to adapt to the production of Offshore Heavy Oil Field oil reservoir
The big feature of lifting rate out, downhole rotational-flow formula oil water separator will be in drains by stages such as water conservancy diversion, eddy flow, current stabilization, water removals
Viscous crude and sewage separation.The sewage isolated is recycled into former deep earth heart water layer, forms GEOTHERMAL WATER through 12 pressurization of re-injection pump
It recycles, extends the Heavy Oil Reservoir exploitation period, improve the recovery percent of reserves of heavy crude reservoir, avoid and discharge dirt into ocean
Water.
Claims (4)
1. a kind of device for exploiting Offshore Heavy Oil Field oil reservoir, described including the multiple wells group by single-well injection-production well and water filling well construction
The quantity of injection-production well and water injection well is at least each a bite；
It is characterized by: the single-well injection-production well includes single-well injection-production casing (4), oil pipe (6) and the first water injection pipe (3),
The oil pipe (6) of petroleum pipeline (1) is connected in well head and is connected with the first water injection pipe (3) of water-supply-pipe (2) along same-well injection in well head
The axial parallel of casing (4) is adopted, and is distributed in single-well injection-production casing (4)；Along well head by upper in oil pipe (6)
Screw pump (4), second level downhole separation system (7) and level-one downhole separation system (9) are successively equipped under, wherein screw rod
Mutually outlet is connected the liquid flow inlet for pumping (4) with the oil of second level downhole separation system (7), and the screw pump (4) is used for two
The oil that grade downhole separation system (7) is separated gives rise to ground；The mutually outlet and two of the oil of level-one downhole separation system (9)
The liquid phase entrance of grade downhole separation system (7) is connected, water phase outlet and the re-injection pipe of level-one downhole separation system (9)
(11) it is connected, the water phase outlet of second level downhole separation system (7) is also connected with re-injection pipe (11), in re-injection pipe (11)
On, it is located between two water phase outlet connections, is connected with pressure regulator valve (8)；Re-injection is connected in the outlet end of re-injection pipe (11)
It pumps (12), the produced-water reinjection for re-injection pipe (11) to be discharged to undersea stratum；
The water injection well includes water filling casing (14), the second water injection pipe (13), distributor (15), downhole steam generator (16)
And pulsating pump (17)；Wherein, distributor (15), downhole steam generator (16) and pulsating pump (17) are connected to the second water filling
It manages on (13)；The pulsating pump is for will be pumped into the second water injection pipe (13), the underground in the GEOTHERMAL WATER in deep earth heart water layer
Steam generator is used to convert the GEOTHERMAL WATER in the second water injection pipe (13) to vapor, and the distributor is used for the second water filling
The vapor metaideophone in (13) is managed into Heavy Oil Reservoir.
2. a kind of method for exploiting Offshore Heavy Oil Field oil reservoir, comprising the following steps:
The device that Offshore Heavy Oil Field oil reservoir is exploited described in claim 1 is arranged in Heavy Oil Reservoir and deep by the first step
The production district of hot water layer, wherein single-well injection-production well is symmetrically distributed in two opposite sides of production district with water injection well, is formed by same well
The well group of injection-production well and water filling well construction；Wherein, after water injection well drill-through Heavy Oil Reservoir, need to continue to extend to water temperature at 45 DEG C
Above deep earth heart water layer；The tripping in single-well injection-production casing in boring procedure injects well cementing of cement, in Heavy Oil Reservoir and depth
Portion's underground heat water layer well section perforation completion；
Second step will be pumped into the second water injection pipe (13) using the pulsating pump in water injection well in the GEOTHERMAL WATER in deep earth heart water layer,
GEOTHERMAL WATER is converted into vapor through downhole steam generator, and after vapor enters distributor, metaideophone is into Heavy Oil Reservoir；
Third step infuses the vapor into Heavy Oil Reservoir for self-contained energy transmission to Heavy Oil Reservoir, viscous crude is made to heat up, reduces
Viscous crude viscosity of crude, the viscous crude being heated distill out light hydrocarbon components, with water vapour by viscous crude in situ to single-well injection-production well
Direction displacement；After vapor transfers energy to Heavy Oil Reservoir, own temperature is reduced to boiling point hereinafter, forming high-temperature-hot-water；
4th step, the drain that displacement goes out in Heavy Oil Reservoir enter the level-one downhole separation system in single-well injection-production well, isolate
Low viscous crude, the low viscous crude isolated be again separate out viscous crude through second level downhole separation system, and screw pump will be isolated
Viscous crude is lifted to ground；The sewage that level-one downhole separation system, second level downhole separation system are isolated is pumped through re-injection and is pressurizeed,
Former deep earth heart water layer is recycled into avoid ground surface environment pollution.
3. a kind of method for exploiting Offshore Heavy Oil Field oil reservoir according to claim 2, it is characterised in that: by seawater through same-well injection
The first water injection pipe injection deep earth heart water layer in well is adopted, for supplementing deep earth heart water layer energy, and is sufficiently employed in situ
GEOTHERMAL WATER.
4. a kind of method for exploiting Offshore Heavy Oil Field oil reservoir according to claim 3, it is characterised in that: in the first step, same
After the drill-through Heavy Oil Reservoir section perforation completion of well injection-production well, using sand-proof pipe sand control, and gravel filling is carried out, sand gear will be produced thick
Oil reservoir.
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| CN201910182976.8A CN109915082A (en) | 2019-03-12 | 2019-03-12 | A kind of device and method for exploiting Offshore Heavy Oil Field oil reservoir |
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| CN201910182976.8A CN109915082A (en) | 2019-03-12 | 2019-03-12 | A kind of device and method for exploiting Offshore Heavy Oil Field oil reservoir |
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Application publication date: 20190621 |