CN1246567C - System for producing de-watered oil - Google Patents
System for producing de-watered oil Download PDFInfo
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- CN1246567C CN1246567C CNB008171882A CN00817188A CN1246567C CN 1246567 C CN1246567 C CN 1246567C CN B008171882 A CNB008171882 A CN B008171882A CN 00817188 A CN00817188 A CN 00817188A CN 1246567 C CN1246567 C CN 1246567C
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 169
- 239000012530 fluid Substances 0.000 claims abstract description 115
- 238000000926 separation method Methods 0.000 claims abstract description 33
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims description 19
- 239000006185 dispersion Substances 0.000 claims description 12
- 238000003475 lamination Methods 0.000 claims description 8
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000004891 communication Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 107
- 235000019198 oils Nutrition 0.000 description 107
- 230000008878 coupling Effects 0.000 description 15
- 238000010168 coupling process Methods 0.000 description 15
- 238000005859 coupling reaction Methods 0.000 description 15
- 238000004458 analytical method Methods 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 208000005189 Embolism Diseases 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
- E21B43/385—Arrangements for separating materials produced by the well in the well by reinjecting the separated materials into an earth formation in the same well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Removal Of Floating Material (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
System for producing de-watered oil from an underground formation (2) to the surface (4), which system comprises a reception well (7) having a substantially horizontal or inclined section (10) for primary oil/water separation of the well fluid; a water discharge system (12) having an upstream end (13) that is capable of receiving during normal operation liquid from the lower region (14) of the downstream part (9) of the reception well (7); and a secondary underground oil/water separator (18) having an upstream end (19) that is capable of receiving during normal operation liquid from the upper region (20) of the downstream part (9) of the reception well (7), the secondary separator having an outlet (21) for de-watered oil that is in fluid communication with the inlet (5) of a production well and an outlet (22) for a water-enriched component that is in fluid communication with the water discharge system (12).
Description
Technical field
The present invention relates to a kind of system that produces dehydrated oil from a subsurface structure.
In manual and claims, term " well fluids " is used to refer to a kind of fluid that comprises hydrocarbon ils and water, and it is received from a subsurface structure by system according to the present invention.And hydrocarbon ils is known as oil.
The present invention be more particularly directed to a kind of system, wherein a kind of well fluids can be underground separated, makes to produce oil dehydrated below the face of land on the face of land.Be understood that the face of land also can be the seabed.
Background technology
International patent application bulletin No.WO98/41304 discloses a kind of system of producing oil from subsurface structure of being used for of the preamble according to claim 1, and this system comprises:
A kind of producing well extends downwards from the face of land, and has an inlet below the face of land;
One received well passes subsurface structure, and can be from subsurface structure received well fluid, and wherein the downstream part of well fluids comprises one substantially horizontal section; With
One water is discharged system, has a upstream extremity, can receive the fluid from the lower area of horizontal segment;
Wherein the inlet of producing well is configured to receive fluid from the zone of going up of horizontal segment.
During the normal running of known system, the liquid of well fluids stream is selected, makes well fluids separated at horizontal segment.Fluid layer is formed on the zone up and down of horizontal segment, and an interface is formed between the layer.Near the downstream of horizontal segment, the fluid that flows at lower area is rich water section, and the fluid that flows in last zone is the rich oil part of well fluids.Rich oil partly is produced to ground surface, and remaining rich water section is disposed.Selectively, rich water section also carries out further separating step.
Known system only removes water in large quantities.In order to obtain anhydrous basically oil, promptly water concentration is enough low to allow the pipeline transportation of oil, and known system also comprises the oil water separator of ground surface.Disclose in addition this for remove big water gaging and interfacial level should remain on very narrow limit.
Known system is not only most removal water, but also obtains the rich water section of low oil concentration, and can to make the oil of production have higher water concentration if desired be cost.
The applicant has adopted the separation case of exclusive model analysis oil water mixture.The result of the analysis of model will see figures.1.and.2 below and analyze, and it has disclosed the actual operating state of the well of level, and (flow velocity that comprises well fluids, (water concentration of rich oil part is very big for the length of horizontal segment and diameter.In practice, for example by before the pipeline transportation, the oil require of production anhydrates from well head.
In this respect, adopted false mode of operation as can be seen, to reach the result of the international patent application above-mentioned shown in Fig. 2 and 3.
UK Patent Application GB 2 326 895 discloses a kind of device, is used to adopt a single underground separating step, produces to comprise hydrocarbon and fluid water in subsurface structure, in order to allow to reduce the separation equipment on the face of land.This equipment comprises the well section of an inclination, and at least two shunt access wherein are set, and this flow channel by baffle plate, pipeline or similar item separately.The fluid of receiving from the hydrocarbon part of the collection of well section directly is pumped into the face of land and is injected into from the fluid that the enrichment water section of well section receives gets back to subsurface structure.At least one pump is by a monitor control operation, and this monitor is placed in the scope of separating device.
Summary of the invention
An object of the present invention is to provide a system, be used for from the subsurface structure face of land that produces oil, wherein oil can anhydrate below the face of land, makes that the water concentration of the oil produced is enough low, to such an extent as to before from well head oil being transported, need not anhydrate on the face of land again.
Another object of the present invention provides a kind of like this system, and it can use under the practical operation condition.
Another purpose of the present invention provides the system of the underground separation of a kind of well fluids, and this system's easy operating is durable and efficient.
For this reason, according to the invention provides a kind of system from subsurface structure production dehydrated oil to the face of land, this system comprises:
One producing well extends downwards from the face of land, and has an inlet below the face of land;
One received well passes subsurface structure, and can be from subsurface structure received well fluid, and wherein the downstream part of received well comprises the section of a substantial horizontal or inclination, the elementary oil/moisture that is used for well fluids from;
One water is discharged system, has a upstream extremity, can receive the fluid from the lower area of the downstream part of received well between error-free running period; With
One auxiliary underground oil/water separator,
It is characterized in that this auxiliary eliminator has a upstream extremity, its can receive between error-free running period the downstream part come from received well on the fluid in zone, this auxiliary air separator has a dehydration oil outlet, this outlet is communicated with the mutual fluid of the inlet of producing well, with the outlet of an enrichment water section, discharge system fluid with water and be communicated with.
The profound understanding that the present invention is based on the applicant adopts exclusive model, the well fluids that flows on the well section of substantial horizontal or inclination is separated under the practical operation condition, in the close downstream end of the well section of substantial horizontal or inclination, the water concentration (volume %) of rich oil part on top is more much bigger than the oil concentration (volume %) at the rich water section of bottom.Have been found that particularly rich oil under the practical operation condition partly comprises the water greater than 10 volume %.The oil concentration of rich water section is between 0.01-0.1 volume %.In manual and claims, term " go up zone " and " lower area " are used in horizontal segment, and with the space of the top of the level of the boundary of representing horizontal segment, and the same space of tilting section also represented in this term.The employing of term " substantial horizontal " section is the deviation in order to consider that directed subterranean well produces.Tilting section is a well section, and it is not substantially horizontal, and can have an angle of slope that reaches 80 degree from horizontal plane, and wherein the well section is the upstream portion from its received well fluid, and is acclivitous.
Description of drawings
Present invention is described by embodiment referring now to accompanying drawing, wherein
Fig. 1 represents first result of model analysis of the separation of the well fluids in the horizontal pipe,
Fig. 2 represents second result of model analysis of the separation of the well fluids in the horizontal pipe,
Fig. 3 schematically represents the first embodiment of the present invention,
Fig. 4 schematically represents the second embodiment of the present invention,
Fig. 5 schematically represents the third embodiment of the present invention,
Fig. 6 schematically represents the fourth embodiment of the present invention,
Fig. 7 schematically represents the embodiment that is used as the static separation device of auxiliary air separator of the present invention,
Fig. 8 schematically represents the details of the embodiment of static separation device shown in Figure 7.
The specific embodiment
Referring now to Fig. 1,, the result of calculation of wherein having represented to adopt the model of applicant's development to draw.Fig. 1 is illustrated in the horizontal pipe oil/aqueous mixtures of flowing, calculate in the concentration (volume %) of the water of the rich oil part of the upper area of the end of horizontal pipe (ordinate) as the function of horizontal pipe length with rice office (abscissa).
The operation of this calculating is by applying the patent model, allows to estimate to be characterized in the parameter that the oil/aqueous mixtures that flows in the horizontal pipe is separated into the rich water section of the rich oil part on top and bottom.This model is considered some input parameters, comprises the viscosity and the flow velocity of oil and water, the diameter of pipeline, initial drop size.This model in horizontal pipe at the scene by experimental check.
Be selected owing to calculate input parameter, make them be typical and fall into the scope of the actual operating state that the present invention uses.The parameter of choosing comprises oil density 790kg/m
3, oil viscosity is 1mPa.s, flow velocity is 2000m
3/ day, pipe diameter is 0.23 meter, and total water concentration is 50 volume % in the mixture, and initial water droplet size is 50 microns.
Can be clear from Fig. 1, the concentration of the water of rich oil part increases along with the length of horizontal pipe and reduces.This model representation goes out under 1000 meters length, and rich oil partly comprises the water of about 12 volume %.
Another result that model calculates is referring to Fig. 2.Fig. 2 show in horizontal pipe oil/aqueous mixtures of flowing, what calculate is that the concentration (volume %) of water of rich oil part of upper area of end of 1000 meters horizontal pipe (ordinate) is the function of unit (abscissa) with mPa.s as oil viscosity in length.Flow velocity is 1000m
3/ day (curve 1), 1600m
3/ day (curve 2), 2000m
3/ day (curve 3).Other input parameter calculates identical with Fig. 1.Referring now to Fig. 3.The system 1 that is used for producing from subsurface structure 2 dehydrated oils comprises a producing well 3, from the face of land 4 extend, and have downwards an inlet 5 on the face of land below 4 and the outlet 6 at 4 places, a face of land be provided with a well head 6a.
This system also comprises a received well 7, and it passes subsurface structure 2, and can the received well fluid by inlet device 8, and wherein the downstream part 9 of received well 7 comprises a substantially horizontal part 10, during normal running, carries out the initial gross separation of well fluids.Received well 7 is configured to be connected to by coupling part 11 upstream of the inlet 5 of producing well 3.
In addition, be provided with the exhaust system 12 of a water, it has upstream extremity 13, is provided in during the normal running, receives fluids from the lower area 14 of the downstream part 9 of received well 7.
Selectively, can or near upstream extremity 13 and/or 11 places, coupling part overfall gap, hole, eliminator, embolism or similar item (not shown) are set, with guiding with keep the fluid section that separates.
The discharge system 12 of water is arranged on the extension, downstream of producing well 3 in this example, below coupling part 11, wherein the cross section of extension can be different from the cross section of producing well 3.In addition, the discharge system 12 of water has a mouth 15, is used to receive rich water section and a pump 16, is used for discharging the well part 17 that system is discharged to fluid in the downstream of pump 16 from water.Well part 17 is suitable for being configured to allowing to be injected into the subsurface structure (not shown) from water discharge system, and well part 17 also is provided with the device that prevents aqueous reflux.
In addition, be provided with an auxiliary underground oil/water separator 18, have an inlet 19 at its upstream end, during normal running, its can be from the downstream part 9 the zone 20 of going up receive fluids.Eliminator 18 has the oil outlet 21 that is used to dewater, itself and the outlet 22 that inlet 5 fluids are communicated with and is used for rich water section of producing well 3, and its outlet 15 of discharging in the system 12 through piping 23 and water is connected.Eliminator is configured to the part of producing well 3 in this example, and this part is positioned at the top of coupling part 11, makes that eliminator can not be by bypass when normal running.That part of of eliminator is set in the producing well 3 can be by reaming.
During normal running, flow to the downstream part 9 that comprises horizontal component 10 according to the system 1 of embodiment shown in Figure 3 through 8 well fluids that receive that enter the mouth, and separated.The zone up and down that fluid layer is formed on the downstream part 9 of received well 7 forms, and the (not shown) of demarcating between each layer.Downstream near received well 7 is rich water section at the fluid that lower area 14 flows, and the fluid that flows in last zone 20 is the rich oil part of well fluids.The liquid of well fluids stream is separated in this initial process step to be reached rich water section and has enough low oil concentration.
Rich water section enters the upstream extremity 13 of water discharge system 12, near coupling part 11.
Dehydrated oil leaves eliminator 18 through exporting 21, and enters into producing well 3 through inlet 5, arrives the face of land 4 then, discharges system 1 by the well head 6a that exports 6 places.Rich water section through export 22 and pipeline 23 leave eliminator, and mixes with rich water section at outlet 15 places and the water of formation de-oiling in water discharge system 12.During normal running, water is discharged system 12 will be filled the water of de-oiling to certain water level (not shown).The water of de-oiling is discharged from through well part 17 by pump 16.The above-mentioned explanation of the system that represents from Fig. 3 can be clear, and a special advantage of the present invention is that well fluids is separated into dehydrated oil and de-oiled water.De-oiled water is discharged to a subsurface structure, only produces dehydrated oil to the face of land according to system of the present invention.
The curve of the well between substantially horizontal part 10 and coupling part 11 is designed to disintegrate-quality not to be reduced basically.
Referring now to Fig. 4,, schematically shows another embodiment of the present invention.The part similar with Fig. 3 adopts identical label.System 100 is extensions of system 1 shown in Figure 3.It also comprises a connection well 101.Connect well 101 and be configured in this embodiment, in the coupling part 102 places it link to each other with received well 7, near the downstream 103 of substantially horizontal part 10, and in the coupling part 106 places it link to each other with water discharge system 12, below coupling part 11.The inlet that connects well 101 is set at 102 places, coupling part, so that receive fluids from lower area 14, and 106 places communicate with water discharge system fluid in the coupling part to connect the outlet of well 101.
United States Patent (USP) 4,390,067 discloses a kind of well system, comprises at least two well bores, extend downwards from the face of land, and by at least one normally the well bore of level link to each other.
During the normal running of system 100, rich water section 11 does not enter water and discharges system from the coupling part.At this, can select an embolism 108 is arranged on below the coupling part 11, this embolism is suitable for having the pipeline 23 that an opening is used to connect outlet 22 and opening 15.
Referring now to Fig. 5,, it schematically represents the third embodiment of the present invention.The part similar with Fig. 3 adopts identical label.System 200 shown in Figure 5 is different from system shown in Figure 31, is that water discharge system 202 comprises a water discharge well 204, and it is configured to a branch of received well.Well 7 and 204 coupling part 206 are set at the outlet near the substantially horizontal part 10 of downstream part 9.
During normal running, well fluids enters into the part 208 with lower area 209 through the primary separation of substantial horizontal part 10 by coupling part 206 time.Lower area 209 receives rich water section from the lower area 14 of the downstream part 9 of received well 7.
During normal running, the laminar flow in the rich oil of well fluids part zone 210 on section 208 is moving, then by a well part 212 that is bent upwards.From well part 212,19 enter auxiliary oil water separator 18 by entering the mouth.At oil water separator 18, rich oil partly is separated into dehydrated oil and enrichment water section.The oil of dehydration leaves eliminator 18 through exporting 21, arrives the inlet 5 of producing well 3, arrive the face of land 4 again, through exporting 6 well head 6a from system's 200 discharges.The enrichment water section leaves eliminator 18 through exporting 22, and the pipeline 23 arrival outlets 15 of flowing through, and it is arranged on the lower area 209 of part 208.Enrichment water section and rich water section are mixed into the water of de-oiling there.
Through piping 216, in pipeline 216, have inlet 217 and be arranged on lower area 209, the water of de-oiling is discharged system 202 by water and is received.Send by water discharge well 204 by the water pump of pump 16, and insert subsurface structure 220 by means of egress 218 with de-oiling.
Referring now to Fig. 6,, it schematically shows the fourth embodiment of the present invention.The part similar with Fig. 3 adopts identical label.System 300 shown in Figure 6 is different from system shown in Figure 31, is the setting of the oil water separator of assisting and the setting that water is discharged system.
The auxiliary oil water separator 18 of system 300 is arranged on the reaming section of the lower end of producing well 3.Eliminator 18 is used for receiving fluids by its 19 fluids that enter the mouth from the horizontal component 10 of the downstream part 9 of received well 7, and wherein eliminator 18 is set at the downstream 303 near horizontal component 10.Oil water separator 18 also has outlet 21 oil that are used to dewater, and with inlet 5 fluid communication of producing well 3, also has outlet 22 and is used for rich water section.It is connected with outlet 15 through piping 23.Outlet 15 is provided with the lower area 304 of horizontal segment 10, near the downstream 303 of horizontal segment 10.
In the downstream of water discharge well 306, in the place of the lowest order that is lower than horizontal segment 10, a pump is installed, to discharge the water of de-oiling, enter subsurface structure 315, and the device (not shown) that anti-sealing refluxes is set by exporting 312.
During the normal running of as shown in Figure 6 system 300, the inlet device 8 received well fluids through received well 7 flow to the downstream part 9 that comprises horizontal segment 10, and it is as the initial separator of well fluids.Fluid layer is zone and lower area formation on horizontal segment 10, and form the boundary (not shown) between layer.Near the downstream 303 of horizontal segment 10, the fluid that flows at lower area 304 is rich water section, and the fluid that flows in last zone 302 is the rich oil part of well fluids.Separated the acquiring a certain degree of liquid stream of well fluids, promptly rich water section has enough low oil concentration.
The water of de-oiling is discharged and 306 receptions by water by inlet 310.At substantially horizontal section lowest part, during normal running, water is discharged the water that well is filled de-oiling.By pump 16 water of de-oiling is discharged well 306 through water and pump, and insert subsurface structure 315 through means of egress 312.
May wish to adopt single producing well and single oil/water separator, produce oil from a plurality of received wells.Like this, system according to the present invention comprises the received well that one or more is other, and it passes different local subsurface structures and the received well fluid, the downstream part fluid communication of the downstream part of wherein other received well and this received well.Well fluids is separated into rich water section and the rich oil part can be carried out in a plurality of received wells respectively, perhaps after all well fluids or the mixing of part well fluids, carries out in a common downstream part, perhaps carries out in two ways.
In the international patent application of notification number WO/25005, disclose a kind of missile silo system, comprised the well bore of a perpendicular, with the well section of one or more level of extending from vertical well bore.
Disclose a kind of missile silo system in the international patent application of notification number WO/50679, comprised a main shaft and one or more additional well, wherein each well extends downwards from the face of land, and comprises one substantially horizontal section in constituting producing.Fluid is communicated with horizontal segment that should additional well by producing formation with the horizontal segment of main shaft, does not still intersect with main shaft.
According to the underground oil/water separator that adopts in the system of the present invention can be well known in the art various forms of, as whirlwind, coalescer or a static separation device.Advantageously, eliminator is a static state, is arranged in the disengagement chamber, and wherein the height of disengagement chamber is greater than the thickness of the oil/aqueous dispersion band of the formation under the normal operating condition.Disengagement chamber can be favourable the reaming section that is arranged on producing well.
Consider, in underground disengagement chamber, can utilize the physical condition of well, as the temperature and pressure that raises, the disintegrate-quality of its influence oil, make under the economically feasible actually condition, be separated into dried relatively oil and relative pure water effectively from the fluid that the zone receives of going up of the downstream part of received well.
At the fluid that is received by static separation device zone from the downstream part of received well during the normal running is the rich oil part of the well fluids of oil/aqueous dispersion form, comprises the water greater than 10 volume %.Under the influence of gravity, the separation of such oil/water dispersion can be described by the model of applicant's development in disengagement chamber.This so-called dispersion band model bulletin is people's such as H.G.Polderman SPE paper 1997 No. 38816.This model can be used in the separation of describing in the disengagement chamber.An important separating mechanism is based on the coalescer of the little water droplet in the dispersion train, can sink to lower floor when water droplet increases.During normal running, form three liquid layers: the bottom of a pure relatively water, an intermediate layer comprises the dispersion thing of oil and water, is relative dried oil with a upper strata.The intermediate layer is also referred to as dispersion train.
Suitably, the entrance and exit of eliminator is configured to, and supplies with vertical with separated portions or the approaching turnover disengagement chamber that vertically flows.
In first embodiment of such static separation device, eliminator also comprises a liquid flow distribution device, is used for arriving in a predetermined upright position distributing fluids transverse cross-sectional area of disengagement chamber.Be preferably, allow fluid to enter into disengagement chamber through one or more opening with the speed that is lower than 1m/s in a predetermined upright position.In disengagement chamber, fluid is allowed to be separated into the enrichment water section of a low layer, the oil in an intermediate layer and aqueous dispersion part and a upper strata dehydrated oil part.The fluid of the upper and lower takes out respectively through the outlet of dehydrated oil outlet and enrichment water section.Eliminator can also comprise a liquid level detection device, is used to measure the upright position of the boundary of two fluid layers, so that remain on during the normal running upright position of the boundary between two fluid layers.
In a second embodiment, a static separation device also comprises as auxiliary air separator of the present invention:
The plate of the inclination that one folded perpendicular separation is opened wherein limits a separated space between each is to adjacent plate;
The inlet duct of a perpendicular is communicated with the eliminator upstream extremity, this inlet duct is transverse to this lamination, and be configured to from the upward zone reception fluid of the downstream part of received well lower end, and one or more fluid issuing is provided, they respectively reach separated space;
The oil collection channel of a perpendicular, have an oil export in the top and be communicated with the outlet of the dehydrated oil of eliminator, this oil collection channel has one or more inlet, each oil-in is configured to, receive fluid from the highest region territory of separated space, wherein at least just the plate below each oil-in is provided with a baffle plate on vertical the sensing; With
The water collection channel of a perpendicular has a water out in its least significant end, be connected with the outlet of the enrichment water section of eliminator, this oil collection channel has one or more water inlet, each water inlet is configured to receive fluid from the lowermost extent of separated space, wherein at least just at the plate above each water inlet baffle plate under one vertical the sensing is set.
Referring now to Fig. 7 and 8.Fig. 7 represents an example of a static separation device 410, and it is arranged in the disengagement chamber 406, in the reaming section (not shown) of producing well.This disengagement chamber 406 has circular cross-section basically.The vertical wall 408 of disengagement chamber 406 is formed by the structure 409 that centers on, but should be understood that this wall can also be made of a pit shaft, as a borehole wall.The wall of disengagement chamber also forms the wall of eliminator.Static separation device 410 comprises one, and folded what tilt is flat plate 430,431,432 basically, and they are parallel to each other and basically with equidistant vertically spaced apart.The space that limits between two adjacent plates is known as separated space.For example, plate 430 and 431 limits separated space 435, and plate 431 and 432 limits separated space 436.Below the minimum plate of this lamination, a parallel substrate 437 is set, wherein the outward flange of substrate and engaging that the wall of disengagement chamber 406 seals.Between plate 432 and substrate 437, limit another disengagement chamber 438.
This lamination and access road 440 intersect, and it passes this lamination from an opening 442 and extends upward in the disengagement chamber intermediate vertical.The passage of inlet duct is by a plate, and for example passage 443 passes plate 431, thereby is arranged to, the wall of inlet duct 440 cooperates with this plate hermetically, and for example plate 431, thereby prevents between adjacent separated space, as separated space 435 and 436, fluid communication is arranged along inlet duct.In addition, inlet duct is provided with radially exit opening 444,445,446, and it is opened respectively to separated space 435,436,438.Should be understood that other exit opening can be set up, open to different radial direction.Exit opening is favourable be arranged on horizontal plane axially, above-mentioned plate is around this axle inclination, promptly in Fig. 7 an axis normal in paper plane.
Further specify the details of hang plate referring now to Fig. 8, wherein the plate 431 and 432 in the presentation graphs 7 schematically.The edge 447 of plate 431 comprises that at the upside 448 of plate 431 baffle plate 450 in 449, one sensings of a straight flange is installed on this limit.At downside 452, edge 447 comprises that the baffle plate 456 under 454, one sensings of a straight flange is installed on this limit.
Referring to Fig. 7, the other hang plate of this lamination is respectively arranged with in the sensing and the baffle plate 458,459,460,461 under pointing at their upper and lower sides similarly again.The part that remaining of the edge of each hang plate do not installed baffle plate is configured to engage with wall 408 hermetically.
Relative with oil collection channel 465, eliminator 410 comprises a water collection channel 475, and it is formed by the space that baffle plate 460,456,461 under pointing to and wall 408 limit.This water collection channel 475 comprises water inlet, and for example water inlet 480 is configured to receive fluid from the zone bottom 482 of separated space 435.Water inlet 480 is by the bottom 454 of plate 431 and the just qualification of the baffle plate under the sensing of the plate above the water inlet 480 430.Water collection channel 475 comprises that also an outlet 483 is connected with the outlet 418 of static separation device 410.
Baffled plate 430,431 and 432 is configured to, and the shortest horizontal range between baffle plate in the sensing and the wall 408 increases from bottom to top, and the baffle plate under pointing to and the shortest horizontal range between the wall 408 increase from the top to the bottom.In this way, the cross sectional area of oil collection channel 465 and water collection channel 475 increases in the direction towards their corresponding outlets 473 and 483.Because eliminator 410 is not included in the part that moves during the normal running, so it represents a static oil water separator.
During normal running, fluid enters into the upstream extremity 412 of static separation device 410, enters the opening 442 of access road 440, and is allowed to enter into separated space 435,436,437 by exit opening 444,445 and 446.Have been found that if all openings have identical cross-sectional area then good separating effect.If the diameter of opening approximately is the diameter of access road, feasible pressure by opening falls little, then effective.
Now separation is described in detail.For this reason, we note the separated space 436 between plate 431 and 432.At this separated space 436, form three fluid layers: a upper strata is the oil of dehydration, and an intermediate layer is a dispersion train, and a lower floor is the enrichment water layer.The oil reservoir of dehydration flows towards the zone 472 of the top of separated space 436, leaves separated space therefrom, 470 enters into oil collection channel by entering the mouth.The enrichment water layer flows towards the zone bottom 485 of separated space 436, leaves separated space therefrom, 486 enters into water collection channel by entering the mouth.Be similar separating in space 435 and 435.Oil collection channel 465 receives the dehydrated oil part from all separated spaces, and because the cross section of passage broadens towards outlet 473, the flowing velocity vertically upward of dehydrated oil part can remain basically unchanged.From exporting 473, the dehydrated oil of collection partly flow to the dehydrated oil outlet 415 of eliminator.
In another embodiment, the plate of inclination can be taked funnel form basically, is arranged to be parallel to each other basically, and wherein each funnel is provided with a central opening.
By the hang plate that a folded perpendicular separation is opened is installed, the efficient of disengagement chamber can improve, and promptly the same throughput with the disengagement chamber of bigger no plate can be handled in chamber than low height.In practice, can reach often being reduced to of disengagement chamber desired height original 1/1.5 to 1/6.Sometimes, the height of disengagement chamber is not a limiting factor (s) of the design of well, and can use the eliminator that does not have a lamination.
The typical sizes of disengagement chamber uses dispersion band model to calculate under following hypothesis: the total flow velocity by eliminator is well fluids 1000m
3/ day, this well fluids comprises 50 volume % water, and dry oil viscosity is 0.001Pa.s.Therefore, the disengagement chamber that needs about 1 rice diameter and 5 meters height.For relatively, a lamination is installed in disengagement chamber, highly need to be reduced to for example 2 meters.Suitably, the height/diameter of disengagement chamber is than less than 6, and wherein diameter is understood that to have the diameter of a circle of same cross-sectional area, and this area is that the volume of disengagement chamber is divided by its height.
Should be understood that: in the practical application of the present invention, can carry out additional commercial measurement well known in the art, and the expert is the expert.For example, some during those are measured will be described in the back briefly.
Well according to system of the present invention, perhaps part wherein, the borehole wall, pipeline, packing, flow control valve, measureing equipment, data line, energy transmission line can be set to subsurface equipment or other other device well known in the art, be used for operation and control a well system.
Remove in well fluids and to comprise You Heshui, also comprise under the situation of gas, a gas-bearing formation is formed on the top of the layer that may flow at all the other fluids of the downstream part of received well.Gas can reduce the efficient of eliminator.Therefore advantageously in the suitable position of system, the outlet of a gas is set, is connected to gas and discharges system.
May need to adopt subsurface equipment to measure.This operation to monitoring and control system may be favourable.
As an example, can install and measure equipment, with the content of oil, gas or the water of the fluid of some position in the monitoring system.For example, the water content of de-oiled water, rich water section, enrichment water section or dehydrated oil and oil content can be by suitable device measurings.
In addition, though the accurate vertical height of the boundary between the layer of the different piece of some position is not strict for the effect of system usually in the system, and can change in predetermined restriction, may need to adopt monitor to measure this height.
The result of Ce Lianging can for example be used to the flow rate of fluid of some position in the control system like this, and it is controlled in the predetermined restriction.The flow velocity of how controlling according to system of the present invention is well known in the art, and for example, the well fluids of injection comes from last zone or the fluid of lower area, de-oiled water or the dehydrated oil of the downstream part of received well.For this reason, system can comprise controllable valve, pump, choke valve, movably sleeve, adjustable hole or other suitable equipment.
May need to improve by the device convection cell separation partly of physics or chemistry, for example, by chemical injection well known in the art.
Under the situation of the well section that inclination is set for primary separation, advantageously in the downstream of tilting section, near the upstream region of auxiliary air separator and its, be provided with one substantially horizontal section, it can reach for example 100 meters long.
Should be understood that de-oiling can be injected into subsurface structure, well fluids is taken out from this.With this, the injection of de-oiled water can be used for keeping the pressure of subsurface structure.
Therefore, the invention provides a kind of system, be used for from the subsurface structure face of land that produces oil, wherein oil can dewater below the face of land, makes that the water concentration of the oil produced is enough low, to such an extent as to before oil is transported from well head, need further not dewater on the face of land.
Claims (20)
1. produce the system of dehydrated oil to the face of land from a subsurface structure for one kind, this system comprises:
One producing well extends downwards from the face of land, and has an inlet below the face of land;
One received well passes subsurface structure, and can be from subsurface structure received well fluid, and wherein the downstream part of received well comprises the section of a substantial horizontal or inclination, the elementary oil/moisture that is used for well fluids from;
One water is discharged system, has a upstream extremity, can receive the fluid from the lower area of the downstream part of received well between error-free running period; With
One auxiliary underground oil/water separator,
It is characterized in that this auxiliary eliminator has a upstream extremity, its can receive between error-free running period the downstream part come from received well on the fluid in zone, this auxiliary air separator has a dehydration oil outlet, this outlet is communicated with the mutual fluid of the inlet of producing well, with the outlet of an enrichment water section, discharge system fluid with water and be communicated with.
2. according to the system of claim 1, it is characterized in that water discharge system comprises that the fluid that will come from lower area and enrichment water section is injected into subsurface structure.
3. according to the system of claim 1 or 2, also comprise a connection well, wherein connect well and have an inlet, be configured to receive fluid and an outlet of the lower area of the downstream part that comes from received well, discharge system fluid with water and be communicated with.
4. according to the system of claim 1 or 2, it is characterized in that water discharge system comprises a water discharge well, it is a branch of received well.
5. according to the system of claim 1 or 2, it is characterized in that water discharge system comprises a water discharge well, the direction that its gradient longshore current body flows tilts.
6. according to the system of claim 1 or 2, it is characterized in that also comprising an other received well, be arranged to received well fluid from subsurface structure, wherein the downstream part of this other received well is communicated with the downstream part fluid of received well.
7. according to the system of claim 1 or 2, it is characterized in that also comprising underground survey equipment, with the characteristic of the fluid of a certain position of measuring system.
8. according to the system of claim 7, it is characterized in that this characteristic is the concentration of a part in the fluid.
9. according to the system of claim 7, it is characterized in that this characteristic is the vertical height of the boundary between the layer of different piece of well fluids of a certain position of system.
10. according to the system of claim 1 or 2, it is characterized in that also comprising the device of the fluid flow of a certain position in the control system.
11. according to the system of claim 7, it is characterized in that this system comprises the device of fluid flow of a certain position of control system, the data that obtain from underground survey equipment are used to control the input of the device that fluid flows.
12. according to the system of claim 1 or 2, it is characterized in that this auxiliary underground oil/water separator chooses in following group, comprise that cyclone, profit divide cohesion strainer, perhaps a static separation device.
13. according to the system of claim 12, it is characterized in that this auxiliary air separator is a static separation device, it is arranged in the disengagement chamber, and wherein the height of disengagement chamber is greater than the thickness of dispersion train, this dispersion train forms under normal operating state.
14. according to the system of claim 13, it is characterized in that this static separation device also comprises a liquid flow distribution device, it is arranged in predetermined vertical position will be assigned to the transverse cross-sectional area of disengagement chamber from the well fluids that separator inlet receives.
15. according to the system of claim 13, wherein this static separation device also comprises a liquid level detection device and a liquid flow control device, thereby is keeping boundary between two fluid layers at predetermined altitude during the normal running.
16., it is characterized in that this static separation device also comprises according to the system of claim 13
The plate of the inclination that one folded perpendicular separation is opened wherein limits a separated space between each is to adjacent plate;
The inlet duct of a perpendicular is communicated with the eliminator upstream extremity, and this inlet duct is transverse to this lamination, and is provided in its lower end and receives fluid, and is provided with one or more outlet, and they respectively reach separated space;
The oil collection channel of a perpendicular, have an oil export in the top and be communicated with the outlet of the dehydrated oil of eliminator, this oil collection channel has one or more oil-in, each oil-in is configured to, receive fluid from the highest region territory of separated space, wherein at least just the plate below each oil-in is provided with a baffle plate on vertical the sensing; With
The water collection channel of a perpendicular has a water out at it than low side, be connected with the outlet of the enrichment water section of eliminator, this oil collection channel has one or more water inlet, each water inlet is configured to receive fluid from the lowermost extent of separated space, wherein at least just at the plate above each water inlet baffle plate under one vertical the sensing is set.
17. system according to claim 16, it is characterized in that the plate that tilts is flat basically, and be arranged to be parallel to each other, wherein each hang plate is provided with the baffle plate under vertical the sensing, this baffle plate is installed in the edge of the downside of hang plate, be installed in the edge of the upside of hang plate with the baffle plate in the sensing, wherein the remainder at edge cooperates hermetically with the wall of disengagement chamber, wherein oil collection channel is formed by the space that baffle plate and wall limited on pointing to, and water collection channel is formed by the space that baffle plate and wall limited under pointing to.
18., it is characterized in that the plate that tilts is funnel shaped basically, and be arranged to be parallel to each other that wherein each funnel is provided with a central opening according to the system of claim 16.
19. according to the system of claim 13, the height/diameter ratio that it is characterized in that disengagement chamber is less than 6.
20., it is characterized in that the underground oil/water separator of assisting is set at the reaming section of producing well according to the system of claim 1 or 2.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99204300 | 1999-12-14 | ||
| EP99204300.0 | 1999-12-14 | ||
| EP00305704.9 | 2000-07-06 | ||
| EP00305704 | 2000-07-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1409799A CN1409799A (en) | 2003-04-09 |
| CN1246567C true CN1246567C (en) | 2006-03-22 |
Family
ID=26073227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008171882A Expired - Fee Related CN1246567C (en) | 1999-12-14 | 2000-12-14 | System for producing de-watered oil |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP1240408B1 (en) |
| CN (1) | CN1246567C (en) |
| AU (1) | AU767553B2 (en) |
| BR (1) | BR0016375A (en) |
| CA (1) | CA2393406C (en) |
| DE (1) | DE60014432D1 (en) |
| EA (1) | EA003315B1 (en) |
| MX (1) | MXPA02005652A (en) |
| NO (1) | NO20022812L (en) |
| OA (1) | OA12123A (en) |
| WO (1) | WO2001044620A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7048049B2 (en) | 2001-10-30 | 2006-05-23 | Cdx Gas, Llc | Slant entry well system and method |
| US8297377B2 (en) | 1998-11-20 | 2012-10-30 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
| US7025154B2 (en) | 1998-11-20 | 2006-04-11 | Cdx Gas, Llc | Method and system for circulating fluid in a well system |
| US6280000B1 (en) | 1998-11-20 | 2001-08-28 | Joseph A. Zupanick | Method for production of gas from a coal seam using intersecting well bores |
| US6988548B2 (en) * | 2002-10-03 | 2006-01-24 | Cdx Gas, Llc | Method and system for removing fluid from a subterranean zone using an enlarged cavity |
| NO326586B1 (en) | 2005-05-02 | 2009-01-12 | Norsk Hydro As | Pipe separator. |
| GB2484525A (en) | 2010-10-14 | 2012-04-18 | Apec Ltd | Gravity separation of water from production fluid in a wellbore |
| RU2504646C1 (en) * | 2012-07-27 | 2014-01-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method of oil deposit development using flooding |
| RU2733563C2 (en) * | 2018-12-04 | 2020-10-05 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Method of producing bituminous oil from a horizontal well |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4390067A (en) * | 1981-04-06 | 1983-06-28 | Exxon Production Research Co. | Method of treating reservoirs containing very viscous crude oil or bitumen |
| FR2603205B1 (en) * | 1986-08-29 | 1993-11-12 | Elf Aquitaine Ste Nale | DEVICE FOR SEPARATING AND EXTRACTING COMPONENTS OF DENSES DIFFERENT FROM AN EFFLUENT. |
| FR2603206B1 (en) * | 1986-08-29 | 1990-10-12 | Elf Aquitaine | DEVICE FOR SEPARATING AND EXTRACTING COMPONENTS OF DENSES DIFFERENT FROM AN EFFLUENT. |
| US5402851A (en) * | 1993-05-03 | 1995-04-04 | Baiton; Nick | Horizontal drilling method for hydrocarbon recovery |
| US5443120A (en) * | 1994-08-25 | 1995-08-22 | Mobil Oil Corporation | Method for improving productivity of a well |
| US5715891A (en) * | 1995-09-27 | 1998-02-10 | Natural Reserves Group, Inc. | Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access |
| US6089322A (en) * | 1996-12-02 | 2000-07-18 | Kelley & Sons Group International, Inc. | Method and apparatus for increasing fluid recovery from a subterranean formation |
| NO321386B1 (en) * | 1997-03-19 | 2006-05-02 | Norsk Hydro As | A method and apparatus for separating a fluid comprising several fluid components, preferably separating a source fluid in conjunction with a hydrocarbon / water production rudder |
| WO1998050679A1 (en) * | 1997-05-01 | 1998-11-12 | Amoco Corporation | Communicating horizontal well network |
| GB2326895B (en) * | 1997-07-03 | 1999-08-18 | Schlumberger Ltd | Seperation of oil-well fluid mixtures |
| US5857519A (en) * | 1997-07-31 | 1999-01-12 | Texaco Inc | Downhole disposal of well produced water using pressurized gas |
| US5992521A (en) * | 1997-12-02 | 1999-11-30 | Atlantic Richfield Company | Method and system for increasing oil production from an oil well producing a mixture of oil and gas |
-
2000
- 2000-12-14 WO PCT/EP2000/012862 patent/WO2001044620A1/en active IP Right Grant
- 2000-12-14 DE DE60014432T patent/DE60014432D1/en not_active Expired - Lifetime
- 2000-12-14 OA OA1200200185A patent/OA12123A/en unknown
- 2000-12-14 BR BR0016375-9A patent/BR0016375A/en not_active IP Right Cessation
- 2000-12-14 CA CA002393406A patent/CA2393406C/en not_active Expired - Fee Related
- 2000-12-14 AU AU23663/01A patent/AU767553B2/en not_active Ceased
- 2000-12-14 CN CNB008171882A patent/CN1246567C/en not_active Expired - Fee Related
- 2000-12-14 MX MXPA02005652A patent/MXPA02005652A/en active IP Right Grant
- 2000-12-14 EP EP00987412A patent/EP1240408B1/en not_active Expired - Lifetime
- 2000-12-14 EA EA200200669A patent/EA003315B1/en not_active IP Right Cessation
-
2002
- 2002-06-13 NO NO20022812A patent/NO20022812L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO20022812D0 (en) | 2002-06-13 |
| EA200200669A1 (en) | 2002-12-26 |
| OA12123A (en) | 2006-05-05 |
| WO2001044620A1 (en) | 2001-06-21 |
| EP1240408A1 (en) | 2002-09-18 |
| AU767553B2 (en) | 2003-11-13 |
| NO20022812L (en) | 2002-06-13 |
| BR0016375A (en) | 2002-08-27 |
| CN1409799A (en) | 2003-04-09 |
| EP1240408B1 (en) | 2004-09-29 |
| MXPA02005652A (en) | 2002-10-23 |
| AU2366301A (en) | 2001-06-25 |
| CA2393406A1 (en) | 2001-06-21 |
| DE60014432D1 (en) | 2004-11-04 |
| EA003315B1 (en) | 2003-04-24 |
| CA2393406C (en) | 2008-11-25 |
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