CN107956457A - Oil recovery water control device, directional well completion flow string and its completion method - Google Patents
Oil recovery water control device, directional well completion flow string and its completion method Download PDFInfo
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- CN107956457A CN107956457A CN201810014750.2A CN201810014750A CN107956457A CN 107956457 A CN107956457 A CN 107956457A CN 201810014750 A CN201810014750 A CN 201810014750A CN 107956457 A CN107956457 A CN 107956457A
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- 238000011084 recovery Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 74
- 238000007789 sealing Methods 0.000 claims description 63
- 238000002955 isolation Methods 0.000 claims description 49
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- 238000004519 manufacturing process Methods 0.000 abstract description 30
- 230000000704 physical effect Effects 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 55
- 230000015572 biosynthetic process Effects 0.000 description 25
- 239000003129 oil well Substances 0.000 description 7
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- 238000010586 diagram Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
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- 206010021036 Hyponatraemia Diseases 0.000 description 1
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Classifications
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
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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)
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Abstract
The present invention discloses a kind of oil recovery water control device, directional well completion flow string and its completion method, which includes：Outer tube；The central tube being sheathed in the outer tube；The tube wall of central tube, which is equipped with, is passed through its internal fluid through-hole；The draining machine structure being installed between the outer tube and the central tube；The draining machine structure has approximate disc spin chamber, flow inlet, outflow port and inflow channel；The spin chamber with the central tube radially vertical cross sectional shape for circular and center line with it is radial parallel；The outflow port connects the spin chamber and the fluid through-hole；The inflow channel connects the flow inlet with the spin chamber；The inflow channel is passed through in the spin chamber and causes the fluid of the input spin chamber to form eddy flow.The water control device can according to caused by the fluid flow of production layer position and physical properties of fluids automatic adjustment additional drag, reduce the influence of reservoir heterogeneity.
Description
Technical field
The present invention relates to oilfield well completion technical field, more particularly to a kind of oil recovery water control device, directional well to be recovered the oil with completion
Tubing string and its completion method.
Background technology
As oil well enters mid-later development phase, the moisture content of most oil well is begun to ramp up, opening for oil well of strong influence
Send out effect, a kind of main well type of the directional well as oil field development, still can in the production process after directional well first time completion
There are the problem that High water cut low yield is poorly efficient, so well workover must be carried out to these poorly efficient directional wells and second completion is transformed, so that disk
Asset reserve living, improves Development Response of Oilfield.
Mainly there is perforations adding to change layer, chemical water shutoff, separate zone production etc. for the water blockoff measure that directional well routinely uses at present, but
There is control water specific aim is poor, construction risk is high, big, of high cost to original exploitation formation damage for these conventional water-control oil-increasing methods
Or a series of problems, such as final-period management and cumbersome operation.
The content of the invention
In view of the deficiencies in the prior art, the object of the present invention is to provide a kind of oil recovery water control device, directional well to be adopted with completion
Tubing string and its completion method, so as to according to produced by the fluid flow of corresponding production layer position and physical properties of fluids automatic adjustment
Additional drag, reduce the influence of reservoir heterogeneity, balanced inflow profile, improves the oil production of oil well.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of oil recovery water control device, including：
Outer tube；
The central tube being sheathed in the outer tube；The tube wall of the central tube, which is equipped with, is passed through its internal fluid through-hole；
The draining machine structure being installed between the outer tube and the central tube；The draining machine structure have spin chamber, into
Head piece, outflow port and inflow channel；The spin chamber with the central tube radially vertical cross sectional shape to be circular and
Center line with it is radial parallel；The outflow port connects the spin chamber and the fluid through-hole；The outflow port is positioned at described
On the center line of spin chamber；The inflow channel connects the flow inlet with the spin chamber；The inflow channel leads to
Enter in the spin chamber and cause the fluid of the input spin chamber to form eddy flow.
Preferably, the tangential direction of the inflow channel along the spin chamber is passed through the spin chamber.
Preferably, the ratio of the diameter of the spin chamber and its thickness is 8~15：1；The inner wall of the spin chamber
Flatness is less than ± 0.001mm, and surface roughness is less than 0.00016mm.
Preferably, the length direction of the inflow channel and the central tube is axially in parallel.
Preferably, the flow inlet is included positioned at the first flow inlet of the draining machine structure upper end and positioned at the control water
Second flow inlet of mechanism lower end；
The inflow channel includes the first passage that connects first flow inlet with the spin chamber and by institute
State the second channel that the second flow inlet is connected with the spin chamber.
Preferably, upward, second flow inlet is downward for first flow inlet.
Preferably, the side surface that the spin chamber opens up the outflow port is the conical surface, and the taper of the conical surface is less than 10 degree；
The inner wall of the outflow port is the conical surface, and the taper of the conical surface is more than 20 degree.
Preferably, the area of the flow inlet is more than the cross-sectional area of the inflow channel.
Preferably, the draining machine structure have mutually back to outer binding face and interior binding face；The outflow port is positioned at described
On interior binding face；The outer binding face is arc-shaped surface, is bonded with the inner wall with the outer tube.
Preferably, the outer wall of the central tube is equipped with the holding tank for installing the draining machine structure；The fluid leads to
Hole is arranged on the bottom wall of the holding tank；The interior binding face is bonded with the bottom wall of the holding tank, and the outflow port
Align and connect with the fluid through-hole；The flow inlet is located at outside the holding tank.
Preferably, the outer wall of the central tube is equipped with multiple rectangle rectifier tanks being uniformly distributed circumferentially；The rectangle
The length direction of rectifier tank is axially in parallel with the central tube；A draining machine is equipped with each rectangle rectifier tank
Structure.
Preferably, the top of the external outer tube of the central tube is also arranged with screen jacket；The lower end connection institute of the screen jacket
State the upper end of outer tube.
Preferably, the screen jacket from outside to inside include protective case, filter layer, supporting network, flow-guiding screen, around silk screen and bone
Rack-layer.
A kind of directional well completion flow string, including：
Oil pipe in energy tripping in casing；The upper end of the oil pipe is equipped with hanging packer；The oil pipe is in the suspension envelope
Multiple isolation packers are equipped with every the lower section of device；The isolation packer is used for the oil jacket between described sleeve pipe and the oil pipe
Annular space sealed separation；
As above any oil recovery water control device；It is in series with oil pipe between per the two neighboring isolation packer
One oil recovery water control device.
Preferably, the hanging packer and isolation packer are retrievable completion tool.
Preferably, tubing string can be set described in tripping in oil pipe by further including；The lower end for setting tubing string is sealed condition；
The top and bottom of each isolation packer are connected to sealing drum；It is described set tubing string be equipped with respectively with
Matched two sealing rings of sealing drum；The tube wall that tubing string is set between two sealing rings is equipped with through hole；
The sealing ring upper-lower seal is separated when the sealing ring is located in the sealing drum, so as to be suppressed to setting in tubing string through institute
Through hole is stated to set the isolation packer.
Preferably, the sealing ring and the sealing drum are interference fit.
Preferably, the tubing string that sets includes the sealing bar equipped with the sealing ring and connects the stifled of sealing bar lower end
Head；The sealing bar includes top connection, connecting rod and lower contact；The upper end of the connecting rod connects the top connection, described
The lower end of connecting rod connects the lower contact；It is outer and be located at the connection that one of two described sealing rings are sheathed on the top connection
The top of bar, the another set of top outside the lower end of the connecting rod and positioned at the lower contact；The through hole is positioned at described
In connecting rod.
Preferably, the sealing ring is reinforced seal ring.
Preferably, the through hole is equipped with check valve.
A kind of completion method using as above any directional well completion flow string, including：
The tripping in oil pipe into casing；The oil pipe is connected with the hanging packer, isolation packer and the oil recovery
Water control device；
Into the oil pipe, pitching, which is suppressed, sets the hanging packer；
Into the oil pipe tubing string is set described in tripping in；
The top and bottom that two sealing rings for setting tubing string are positioned at the isolation packer are connected close
In sealed tube；
Suppressed to described set in tubing string and by the through hole by pressure transmission to the isolation packer, will it is described every
From packer setting；
Test envelope.
Preferably, set tubing string by described and from the bottom to top set multiple isolation packers successively.
Beneficial effect：
In conclusion the oil recovery water control device according to controlling equipped with draining machine structure, draining machine structure by that can produce layer
The flow of bit stream body and the change of physical property, automatically generate different resistance pressure drops, and then realize to production layer position producing pressure differential
Dynamic regulation, has more wide applicability.When controlling production layer position oil-producing, formation fluid flows through screen jacket and draining machine
Enter production passage (inside central tube and inside oil pipe) after structure, and work as and control the increase of production layer bit traffic or big volume production water
When, which can increase reverse pressure drop automatically, increase fluid resistance, play the role of controlling water.Meanwhile the water control device is not only
Simple in structure, manufacture cost is low, and with extensively using value.
With reference to following explanation and attached drawing, only certain exemplary embodiments of this invention is disclose in detail, specifies the original of the present invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in scope.In appended power
In the range of the spirit and terms that profit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
Used in a other embodiment, it is combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more further features, one integral piece, step or component.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those skilled in the art, without having to pay creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of oil recovery water control device structure diagram that one embodiment of the present invention provides；
Fig. 2 is the control water section structure diagram in Fig. 1；
Fig. 3 is the control water-bound diagrammatic cross-section in Fig. 2；
Fig. 4 is the schematic perspective view of Fig. 3；
Fig. 5 is a kind of directional well completion flow string structure diagram that one embodiment of the present invention provides；
Fig. 6 is the sealing bar structure diagram in Fig. 5；
Fig. 7 is the sealing drum structure diagram in Fig. 5.
Embodiment
In order to make those skilled in the art more fully understand the technical solution in the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this area is common
Technical staff's all other embodiments obtained on the premise of creative work is not made, should all belong to guarantor of the present invention
The scope of shield.
It should be noted that when element is referred to as " being arranged at " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The normally understood implication of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
The arbitrary and all combination of relevant Listed Items.
The problem of to prevent the edge and basal water of oil well, suppressing water yield formation section water outlet, overcome oil well premature water breakthrough, improve production
Oil mass, as shown in Figures 1 to 4, one embodiment of the present invention provide a kind of oil recovery water control device, including：Outer tube 15；It is sheathed on
Central tube 23 in the outer tube 15；The tube wall of central tube 23, which is equipped with, is passed through its internal fluid through-hole 18；It is arranged at described
Draining machine structure 16 between outer tube 15 and the central tube 23；The draining machine structure 16 has spin chamber 22, flow inlet 19, goes out
Head piece 21 and inflow channel 20；The cross sectional shape vertical with the radial direction of central tube 23 of the spin chamber 22 is circle
And center line with it is radial parallel；The outflow port 21 connects the spin chamber 22 and the fluid through-hole 18；The outflow port
21 on the center line of the spin chamber 22；The inflow channel 20 connects the flow inlet 19 and the spin chamber 22
It is logical；The inflow channel 20 is passed through in the spin chamber 22 and causes the fluid of the input spin chamber 22 to form eddy flow.
When using the water control device 6 of present embodiment, as shown in figure 5, the water control device 6 is connected on oil pipe 3 (tool
Body, the upper and lower ends difference connected pipes 3 of central tube 23), and between two isolation packers 5, fluid through-hole 18 can
(stratum) fluid is conveyed into central tube 23, i.e. draining machine structure 16 inside central tube 23 with communicating.Wherein, two isolation packings
Device 5 corresponds to a production layer, and each layer that produces corresponds to a water control device 6, to realize the tune flow control water of different production layers.
In process of production, local layer fluid flow is excessive or when water content is higher, and formation fluid enters central tube 23
Enter spin chamber 22, ground laminar flow through inflow channel 20 with the annular space between outer tube 15, then the flow inlet 19 through draining machine structure 16
Body forms high-speed rotational in spin chamber 22, and formation fluid is during eddy flow to 21 spiral shell of outflow port at 22 center of spin chamber
Eddy flow moves.According to the law of conservation of momentum, fluid after 22 high speed of spin chamber is spun up by center outflow port 21
When can produce higher throttle resistance, so can to formation fluid produce Additional pressure differential, limit hypertonic section of yield, equilibrium flow into
Section, suppress the production layer goes out dilutional hyponatremia problem, improves oil well service life and recovery ratio.
When the flow of formation fluid is smaller or water content is relatively low, since flow is small and the viscous force of fluid is larger
(oily viscous force is more than the viscous force of water) so that momentum itself is smaller when formation fluid enters draining machine structure 16, and is entering
Since the presence of viscous force also make it that the momentum that formation fluid enters in spin chamber 22 is smaller in circulation road 20, and then can not be
High speed is formed in spin chamber 22 to rotate, and then flow direction can be located at going out for 22 center of spin chamber in the form of approximate bending camber line
Head piece 21 and flow at high speed state can not be obtained, the speed of the formation fluid of such state outflow outflow port 21 is smaller, therefore nothing
Method produces larger additional drag, so as to which the oil production of the production layer, the Liquid output of balanced each production layer is effectively ensured.
It should be noted that the oil recovery water control device 6 can be adapted for straight well, horizontal well is readily applicable to, preferably
For directional well." upper and lower " position relationship described herein, is the position relationship relative to well head.Wherein, in the two
It is upper close to well head, under being, certainly, above-below direction is vertical direction in the shaft, can be away from well head in horizontal well
Overlying relation is determined relative to the position relationship of well head.
In the present embodiment, the upper and lower ends of central tube 23 can connect with oil pipe 3, be used to produce layer in central tube 23
Production liquid (formation fluid) flow into and be delivered to ground.The axial direction of central tube 23 is the length direction of central tube 23.Outer tube 15
Fixing sleeve is arranged on outside central tube 23, the stream communicated between the outer tube 15 and the central tube 23 formed with the outside with outer tube 15
Body passage.The fluid passage can input formation fluid, meanwhile, draining machine structure can be installed between outer tube 15 and central tube 23
16, the flow inlet 19 of draining machine structure 16 is communicated with fluid passage.In this way, formation fluid can enter draining machine structure through fluid passage
16 flow inlet 19, and sequentially enter the inside of draining machine structure 16.
In this embodiment, outer tube 15 can be threadedly connected to outside central tube 23, and to all parts in outer tube 15
Form protective effect.The screw connection point of outer tube 15 and central tube 23 is located at the lower section of draining machine structure 16.Outer tube 15 and center
The connecting portion of pipe 23 can have sealing structure (such as sealing ring), to prevent the fluid into fluid passage from occurring to leak
It cannot be introduced into draining machine structure 16.
Further, the top of the external outer tube 15 of the central tube 23 is also arranged with screen jacket 12；The screen jacket 12
Lower end connects the upper end of the outer tube 15.Fluid passage between outer tube 15 and central tube 23 is connected by screen jacket 12 with outside,
To input formation fluid.The screen jacket 12 can filter the formation fluid of inflow, can so play sand control and protection should
The effect of device.The upper end of outer tube 15 is equipped with banjo fixing butt jointing 13, is connected and ensured in screen jacket 12 with the lower end with screen jacket 12
Fluid does not outflow.
Specifically, the screen jacket 12 include from outside to inside protective case, filter layer, supporting network, flow-guiding screen, around silk screen and
Casing play.The screen jacket 12 of such structure is wrapped in the outside of central tube 23, can play sand control, water conservancy diversion and protective effect.Existing
The precision and quantity of filter screen can be can adjust in the application of field according to the intensity of required sand block, was passed through into the fluid in screen jacket 12
Entered after filtering layer filtering by guide layer water conservancy diversion in draining machine structure 16.
As shown in Figure 1, central tube 23 includes the first base tube 11, the second base tube 17 of connection 11 lower end of the first base tube；
12 fixing sleeve of screen jacket is arranged on outside first base tube 11, and 15 fixing sleeve of outer tube is arranged on outside second base tube 17.Institute
The upper end for stating the first base tube 11 is equipped with box cupling 10 with connected pipes 3.So as can be seen that the water control device 6 can include screen casing
Part 7 and control water section 14.Screen section 7 is connected with control water section 14 by banjo fixing butt jointing 13, and screen section 7 includes first
Base tube 11, screen jacket 12, box cupling 10 and banjo fixing butt jointing 13；Controlling water section 14 includes the second base tube 17, outer tube 15 and control water
Mechanism 16.
In view of formation fluid, through reservoir, after screen jacket 12 enters, its flow regime is complicated, for ease of regulation and control and smoothly into
In the flow inlet 19 for entering draining machine structure 16, the outer wall of the central tube 23 is equipped with multiple rectangle rectifier tanks 24；The rectangle is whole
The length direction of chute 24 is axially in parallel with the central tube 23.Multiple rectangle rectifier tanks 24 are along the central tube 23
Circumferential uniformly arrangement.A draining machine structure 16 is equipped with each rectangle rectifier tank 24.Specifically, draining machine structure 16
In the centre position of the width of rectangle rectifier tank 24 circumferentially.
Wherein, the formation fluid after screen jacket 12 is rectified into edge in flow direction under the guiding of rectangle rectifier tank 24
The axial flowing of central tube 23, it is ensured that the fluid state for flowing into draining machine structure 16 keeps stablizing, to be adjusted to fluid inflow.It is adjacent
Cell wall between two rectangle rectifier tanks 24 can also be supported the inner wall of outer tube 15.As can be seen that the oil recovery control
Water installations 6 can be provided with multiple draining machine structures 16, be preferably that each water control device 6 is equipped with a draining machine structure 16, and
The even circumferential direction for being distributed in central tube 23, can determine according to the formation properties of institute's application layer position.
In draining machine structure 16, the flow inlet 19 can be located on the end face of the draining machine structure 16, and be located at institute
State the end of inflow channel 20.In this way, formation fluid can enter in inflow channel 20 after entering flow inlet 19 according to inertia, into
And it can rapidly enter in spin chamber 22 and form eddy flow.
Specifically, to ensure the fluid flow that enters of draining machine structure 16, the flow inlet 19 includes being located at the draining machine
First flow inlet 19a of 16 upper end of structure and the second flow inlet 19b positioned at 16 lower end of draining machine structure.The inflow channel
20 are included by the first flow inlet 19a first passage 21a connected with the spin chamber 22 and by second influent stream
The second channel 21b that mouth 19b is connected with the spin chamber 22.Wherein, the first flow inlet 19a is along the central tube 23
Top is axially facing, the second flow inlet 19b is axially facing lower section along the central tube 23.Centered on the draining machine structure 16
Symmetrical structure, can so be more conducive to machine-shaping.
In the present embodiment, formation fluid enters in spin chamber 22 through inflow channel 20 forms eddy flow, wherein, this enters
Circulation road 20 is straight way, and the inflow channel 20 can be passed through the spin chamber 22 along with 22 direction tangential of spin chamber
It is interior.In this way, outer rim of the fluid through spin chamber 22 that inflow channel 20 is discharged enters in spin chamber 22, and to spin chamber 22
21 high speed rotary motion of outflow port at center, and higher throttle resistance is formed at outflow port 21.
In the present embodiment, the area of the flow inlet 19 is more than the cross-sectional area of the inflow channel 20.By setting
The flow inlet 19 and inflow channel 20 of this structure are put, acceleration can be formed when fluid is flowed through flow inlet 19 to inflow channel 20
Effect so that fluid is more likely formed eddy flow in spin chamber 22, so as to provide preferable throttle resistance.Specifically, flow inlet
19 diameter is more than the diameter of inflow channel 20, and as shown in Figure 3, Figure 4, flow inlet 19 and inflow channel 20 form funnel structure.
In draining machine structure 16, the generally disc structure of spin chamber 22, the radial direction of the spin chamber 22 and central tube 23
Vertically.Specifically, the spin chamber 22 is approximate disc.The spin chamber possesses higher flatness and finish.
Further, the ratio of the diameter of the spin chamber 22 and its thickness is 8~15：1；The inner wall of the spin chamber 22 is put down
Whole degree is less than ± 0.001mm, and surface roughness is less than 0.00016mm.
The outflow port 21 (being passed through by center line) is set in the center of spin chamber 22, spin chamber 22 can be
Oblate rod structure, the side surface that can also be equipped with outflow port 21 be the conical surface, in this way, the depth (or thickness) of spin chamber 22 is from outer
Edge is gradually deepened to center, specifically, the conical surface number of degrees can be less than 10 degree.Outflow port 21 is worn by the center line of spin chamber 22
Cross, positioned at the center of the side surface of spin chamber 22, the diameter selection range of outflow port 21 is 1mm-4mm, specifically may be used
It is specified flexibly to be chosen according to field situation.Outflow port 21 forms nozzle structure, for preferable restriction effect, outflow port 21
Inner wall be the conical surface, the selection range of the taper of the conical surface is more than 20 degree.Wherein, outflow port 21 passes through with the conical surface so that
Outflow port 21 is gradually reduced along the internal diameter of fluid outbound course, so that convection current body forms preferable throttle resistance.
In view of not only containing crude oil in general formation fluid, but also water is usually contained, for according to the corresponding life controlled
The change (such as content ratio of crude oil and water) of payzone position fluid flow and physical property, can carry under different flows and physical property
For different resistance pressure drops, there is more wide applicability.
Based on the sticky larger of formation fluid Crude Oil, and the inertia of water is larger, by that can make equipped with inflow channel 20
Physical property and flow that the draining machine structure 16 adapts to fluid automatically are obtained, different resistances is provided according to specific fluid flow and physical property
Pressure drop, has stronger applicability.So that the water control device 6 can have fluid identification, fluid conversion and fluid limitation
Effect, the water control device 6 based on pre-estimate formation fluids design, can be autonomous according to fluid components and its property
Ground adjusts the flowing of fluid.
In the present embodiment, the draining machine structure 16 have (along central tube 23 radially) mutually back to outer binding face and interior
Binding face.The outflow port 21 is located on the interior binding face.Wherein, the interior binding face is plane, with the central tube
23 outer wall fitting, the outer binding face is arc-shaped surface, is bonded with the inner wall with the outer tube 15.In the present embodiment,
Draining machine structure 16 can be that split constructs, for example radially be covered with the lid with the arc-shaped surface by a rectangular blocks
Formed.
Specifically, for convenience of the installation of draining machine structure 16, the outer wall of the central tube 23, which is equipped with, installs the draining machine
The holding tank of structure 16；The fluid through-hole 18 is arranged on the bottom wall of the holding tank.The interior binding face and the holding tank
Bottom wall fitting, and the outflow port 21 aligns with the fluid through-hole 18 and connects；The flow inlet 19 is located at the appearance
Receive outside groove.With preferable service life, to avoid flow-induced corrosion, the outer surface of the draining machine structure 16 (is at least contacted with fluid
Surface) using with high abrasion-resistance metal material.
In conclusion the oil recovery water control device 6 according to controlling by that equipped with draining machine structure 16, can produce layer bit stream body
Flow and physical property change, automatically generate different resistance pressure drops, and then realize the dynamic tune to production layer position producing pressure differential
Section, has more wide applicability.When controlling production layer position oil-producing, formation fluid flows through screen jacket 12 and draining machine structure 16
Enter production passage (inside the inside of central tube 23 and oil pipe 3) afterwards, and work as and control the increase of production layer bit traffic or big volume production water
When, which can increase reverse pressure drop automatically, increase fluid resistance, play the role of controlling water.Meanwhile the water control device 6 is not
Only simple in structure, manufacture cost is low, and with extensively using value.
Show referring to Fig. 5, also providing a kind of directional well completion flow string structure for another embodiment of the present invention
It is intended to, which includes：Oil pipe 3 in energy tripping in casing 2；The upper end of the oil pipe 3 is equipped with suspension
Packer 1；The oil pipe 3 is equipped with multiple isolation packers 5 in the lower section of the hanging packer 1；The isolation packer 5 is used
In by the oil jacket annular space sealed separation between described sleeve pipe 2 and the oil pipe 3；As above the oil recovery control water described in any embodiment
Device 6；An oil recovery water control device 6 is in series with oil pipe 3 between per the two neighboring isolation packer 5.
Wherein, for convenience of the tripping in of the directional well completion flow string, the end of the directional well completion flow string can be with
Equipped with guide shoe 9.Hanging packer 1 can play the role of the whole completion flow string of suspension.Isolation packer 5 is by the set of lower part
Pipe 2 (machine pumping tubing string) and flow string (oil pipe 3) are kept apart, and are separated to form multiple reservoir segmentations (production layer).The directional well
Still the poorly efficient difficulty of High water cut low yield in production process after can effectively solving directional well first time completion with completion flow string
Topic, tripping in directional well completion flow string in pit shaft, suppresses water yield formation section by directional well completion flow string
Water outlet, improves oil production, last tripping in pumping tubing string completion production.
In the present embodiment, the hanging packer 1 and isolation packer 5 are retrievable completion tool, so that just
It can be taken out in the completion flow string in the later stage outside well.As can be seen that directional well completion flow string middle and upper part
The isolation packer 5 of hanging packer 1 and interval can unseal, so that in the case of necessary can be by whole directional well
Rise with completion flow string.
For ease of the directional well completion flow string easy to setting, the directional well completion flow string can be with
Including tubing string 4 can be set in oil pipe described in tripping in；The lower end for setting tubing string 4 is sealed condition.
As shown in Figure 6, Figure 7, the top and bottom of each isolation packer 5 are connected to sealing drum 8；The seat
Sealing pipe column 4 be equipped with respectively with described 8 matched two sealing rings 42 of sealing drum.The tubing string 4 that sets is located at two sealing rings
Tube wall between 42 is equipped with through hole；By 42 upper-lower seal of sealing ring when the sealing ring 42 is located in the sealing drum 8
Separate, so as to set the isolation packer 5 through the through hole to setting to suppress in tubing string 4.Wherein, the sealing ring 42 with
The sealing drum 8 is interference fit.
In two sealing rings 42 for setting tubing string 4 respectively positioned at the sealing drum 8 of the top and bottom of isolation packer 5
When, annular space of two sealing rings 42 between the central tube of tubing string 4 and isolation packer 5 is set, which is formed, sets space, this sets
Space is connected with through hole.By suppressing to setting in tubing string 4, the isolation is sealed in pressure via through holes and the space that sets
Set every device 5.
As shown in fig. 6, the tubing string 4 that sets is included under sealing bar and connection sealing bar equipped with the sealing ring 42
The plug at end；The sealing bar includes top connection 41, connecting rod 43 and lower contact 4；The upper end connection institute of the connecting rod 43
Top connection 41 is stated, the lower end of the connecting rod 43 connects the lower contact 4.One of two described sealing rings 42 are sheathed on described
Connector 41 is outer and top positioned at the connecting rod 43, it is another set of arranged on the lower end of the connecting rod 43 outside and be located at it is described under connect
First 4 top.The through hole is located in the connecting rod 43.Specifically, the sealing ring 42 can be vulcanization ring, it is preferred that
The sealing ring 42 is reinforced seal ring 42.To prevent back pressure, check valve can be equipped with the through hole.
Wherein, sealing bar (being referred to as washing pipe) is placed on the inside of completion tubular column, hangs over upper suspension packer 1
The lower part of tubing string 4 (Back-off Pipe String) is set, primarily serves the setting effect of auxiliary isolation packer 5.It is setting in isolation packer 5
Afterwards, washing pipe with top Back-off Pipe String propose well outside.
A kind of completion using as above any directional well completion flow string is also provided in embodiment of the present invention
Method, including：The tripping in oil pipe into casing；The oil pipe is connected with the hanging packer 1, isolation packer 5 and described
Oil recovery water control device；Then, into the oil pipe, pitching is suppressed and sets the hanging packer 1；Again into the oil pipe under
Tubing string 4 is set described in entering；Two sealing rings 42 for setting tubing string 4 are positioned at the upper end of the isolation packer 5 with
In the connected sealing drum 8 in end；Suppress in tubing string 4 to described set and sealed pressure transmission to the isolation by the through hole
Every device 5, the isolation packer 5 is set；Test envelope.Further, by it is described set tubing string 4 from the bottom to top will be multiple described
Isolation packer 5 is set successively.
Directional well with completion flow string in place after construction operation process be：First, seat is suppressed in pitching in oil pipe 3
Hanging packer 1 is sealed, the completion tubular column put above is put and tests extension.Then, suppressed into the annular space of casing 2 and oil pipe 3 to described outstanding
Hang packer 1 and test envelope.Tubing string 4 (being referred to as Back-off Pipe String) is set to shaft bottom by releasing tool tripping in again, above carries and setting
Tubing string 4, after setting the vulcanization ring (sealing ring 42) on 4 tubing string of tubing string and carrying in the sealing drum 8 to 5 both ends of isolation packer, then
Suppressed into oil pipe 3 and set (most lower) isolation packer 5.Finally carry out testing envelope.Specifically, after isolation packer 5 is set,
Using the method that tubing string 4 is set inside lower drain line, sealing bar is transferred to the lower part of isolation packer 5, then well is export-oriented oily
Suppressed in pipe, what the annular space by observing well head returned liquid situation detection and isolation packer sets situation.
Above carry again and set tubing string 4 to secondary isolation packer 5, set, from the bottom to top and so on, by completion tubular column
Interior isolation packer 5 is set successively, after whole isolation packers 5 are set, top is sent into tubing string and is sat together with lower part
Seal auxiliary tool and propose pit shaft, recovered the oil according to the later stage and well workover requires tripping in flow string.
Herein cited any digital value all include between lower limit to upper limit value with the lower value of an incremented and
The all values of upper value, there are the interval of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20
To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
68th, 43 to 51,30 to 32 is equivalent.For the value less than 1, it is 0.0001,0.001,0.01,0.1 suitably to think a unit.
These are only intended to the example clearly expressed, it is believed that the numerical value enumerated between minimum and peak is possible to
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all scopes all include all numerals between endpoint and endpoint.It is used together with scope
" about " or " approximation " be suitable for two endpoints of the scope.Thus, " about 20 to 30 " are intended to covering " about 20 to about
30 ", including at least the endpoint indicated.
All articles and reference disclosed, including patent application and publication, for various purposes by quoting knot
Together in this.Identified element, component, component or step and reality should be included by describing the term " substantially by ... form " of combination
Other elements, component, component or the step of the basic novel feature of the combination are not influenced in matter.Using term "comprising" or
" comprising " describes the combination of element here, component, component or step it is also contemplated that substantially by these elements, component, component
Or the embodiment that step is formed.Here by using term " can with ", it is intended to it is described any to illustrate that " can with " includes
Attribute is all optional.
Multiple element, component, component or step can be provided by single integrated component, component, component or step.It is alternative
Ground, single integrated component, component, component or step can be divided into separated multiple element, component, component or step.It is used for
The open "a" or "an" for describing element, component, component or step is not said to exclude other elements, component, component
Or step.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
State, many embodiments and many applications outside the example provided all will be aobvious and easy for a person skilled in the art
See.Therefore, the scope of this teaching should not be determined with reference to foregoing description, but should with reference to appended claims and this
The four corner of the equivalent that a little claims are possessed determines.It is for comprehensive purpose, all articles and special with reference to including
The disclosure of profit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as inventor the theme is not thought of as it is disclosed
A part for subject matter.
Claims (22)
- A kind of 1. oil recovery water control device, it is characterised in that including：Outer tube；The central tube being sheathed in the outer tube；The tube wall of the central tube, which is equipped with, is passed through its internal fluid through-hole；The draining machine structure being installed between the outer tube and the central tube；The draining machine structure have spin chamber, flow inlet, Outflow port and inflow channel；The cross sectional shape vertical with central tube radial direction of the spin chamber is circular and center Line with it is radial parallel；The outflow port connects the spin chamber and the fluid through-hole；The outflow port is located at the eddy flow On the center line of chamber；The inflow channel connects the flow inlet with the spin chamber；The inflow channel is passed through institute State in spin chamber and cause the fluid of the input spin chamber to form eddy flow.
- 2. oil recovery water control device as claimed in claim 1, it is characterised in that the inflow channel is cut along the spin chamber Line direction is passed through the spin chamber.
- 3. oil recovery water control device as claimed in claim 1, it is characterised in that the diameter of the spin chamber and the ratio of its thickness It is worth for 8~15：1；The flatness of the inner wall of the spin chamber is less than ± 0.001mm, and surface roughness is less than 0.00016mm.
- 4. oil recovery water control device as claimed in claim 1, it is characterised in that the length direction of the inflow channel with it is described in Heart pipe it is axially in parallel.
- 5. the oil recovery water control device as described in claim 1-4 is any, it is characterised in that the flow inlet includes being located at the control First flow inlet of water dispenser structure upper end and the second flow inlet positioned at the draining machine structure lower end；The inflow channel includes the first passage that connects first flow inlet with the spin chamber and by described the The second channel that two flow inlets are connected with the spin chamber.
- 6. oil recovery water control device as claimed in claim 5, it is characterised in that first flow inlet upward, described Two flow inlets are downward.
- 7. oil recovery water control device as claimed in claim 6, it is characterised in that the spin chamber opens up the side of the outflow port Surface is the conical surface, and the taper of the conical surface is less than 10 degree；The inner wall of the outflow port is the conical surface, and the taper of the conical surface is more than 20 degree.
- 8. oil recovery water control device as claimed in claim 1, it is characterised in that the area of the flow inlet enters to circulate more than described The cross-sectional area in road.
- 9. oil recovery water control device as claimed in claim 1, it is characterised in that：The draining machine structure have mutually back to outer fitting Face and interior binding face；The outflow port is located on the interior binding face；The outer binding face is arc-shaped surface, with the outer tube Inner wall fitting.
- 10. oil recovery water control device as claimed in claim 9, it is characterised in that：The outer wall of the central tube is equipped with peace Fill the holding tank of the draining machine structure；The fluid through-hole is arranged on the bottom wall of the holding tank；The interior binding face and institute The bottom wall fitting of holding tank is stated, and the outflow port aligns with the fluid through-hole and connects；The flow inlet is positioned at described Outside holding tank.
- 11. oil recovery water control device as claimed in claim 1, it is characterised in that：The outer wall of the central tube is equipped with multiple edges Circumferential equally distributed rectangle rectifier tank；The length direction of the rectangle rectifier tank is axially in parallel with the central tube；Each A draining machine structure is equipped with the rectangle rectifier tank.
- 12. oil recovery water control device as claimed in claim 1, it is characterised in that：The top of the external outer tube of central tube Also it is arranged with screen jacket；The lower end of the screen jacket connects the upper end of the outer tube.
- 13. oil recovery water control device as claimed in claim 12, it is characterised in that：The screen jacket from outside to inside include protective case, Filter layer, supporting network, flow-guiding screen, around silk screen and casing play.
- A kind of 14. directional well completion flow string, it is characterised in that including：Oil pipe in energy tripping in casing；The upper end of the oil pipe is equipped with hanging packer；The oil pipe is in the hanging packer Lower section be equipped with multiple isolation packers；The isolation packer is used for the oil jacket annular space between described sleeve pipe and the oil pipe Sealed separation；Oil recovery water control device as described in claim 1-13 is any；On oil pipe between per the two neighboring isolation packer It is in series with an oil recovery water control device.
- 15. completion flow string as claimed in claim 14, it is characterised in that the hanging packer and isolation packer are equal For retrievable completion tool.
- 16. completion flow string as claimed in claim 14, it is characterised in that：Further including can setting in oil pipe described in tripping in Tubing string；The lower end for setting tubing string is sealed condition；The top and bottom of each isolation packer are connected to sealing drum；It is described set tubing string be equipped with respectively with it is described Matched two sealing rings of sealing drum；The tube wall that tubing string is set between two sealing rings is equipped with through hole；It is described The sealing ring upper-lower seal is separated when sealing ring is located in the sealing drum, so as to be suppressed to setting in tubing string through described logical Hole sets the isolation packer.
- 17. completion flow string as claimed in claim 16, it is characterised in that：The sealing ring and the sealing drum are interference Coordinate.
- 18. completion flow string as claimed in claim 16, it is characterised in that：The tubing string that sets includes being equipped with the sealing The sealing bar of ring and the plug of connection sealing bar lower end；The sealing bar includes top connection, connecting rod and lower contact；Institute The upper end for stating connecting rod connects the top connection, and the lower end of the connecting rod connects the lower contact；Two sealing rings it One is sheathed on that the top connection is outer and top positioned at the connecting rod, another set of outside the lower end of the connecting rod and to be located at The top of the lower contact；The through hole is located in the connecting rod.
- 19. completion flow string as claimed in claim 18, it is characterised in that：The sealing ring is reinforced seal ring.
- 20. completion flow string as claimed in claim 18, it is characterised in that：The through hole is equipped with check valve.
- 21. a kind of completion method using the directional well completion flow string as described in claim 14-16 is any, its feature exists In, including：The tripping in oil pipe into casing；The oil pipe is connected with the hanging packer, isolation packer and the control water that recovers the oil Device；Into the oil pipe, pitching, which is suppressed, sets the hanging packer；Into the oil pipe tubing string is set described in tripping in；Two sealing rings for setting tubing string are positioned at the sealing drum that the top and bottom of the isolation packer are connected It is interior；Suppressed to described set in tubing string and by the through hole by pressure transmission to the isolation packer, the isolation is sealed Set every device；Test envelope.
- 22. completion method as claimed in claim 21, it is characterised in that：Tubing string is set from the bottom to top by multiple institutes by described Isolation packer is stated to set successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014750.2A CN107956457B (en) | 2018-01-08 | 2018-01-08 | Oil extraction water control device, directional well oil extraction pipe string for well completion and well completion method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014750.2A CN107956457B (en) | 2018-01-08 | 2018-01-08 | Oil extraction water control device, directional well oil extraction pipe string for well completion and well completion method thereof |
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| CN107956457A true CN107956457A (en) | 2018-04-24 |
| CN107956457B CN107956457B (en) | 2023-09-26 |
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|---|---|---|---|
| CN201810014750.2A Active CN107956457B (en) | 2018-01-08 | 2018-01-08 | Oil extraction water control device, directional well oil extraction pipe string for well completion and well completion method thereof |
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| CN110424923A (en) * | 2019-08-06 | 2019-11-08 | 安东柏林石油科技（北京）有限公司 | Accumulation packing particle is realized from the method for water blockoff, from water plugging string and completion structure |
| CN110685648A (en) * | 2019-11-01 | 2020-01-14 | 东营市瑞丰石油技术发展有限责任公司 | Filling tool and well completion string |
| CN112343554A (en) * | 2020-11-16 | 2021-02-09 | 中国海洋石油集团有限公司 | Oil-stabilizing water control mechanism and water control device for light crude oil |
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| CN115135849A (en) * | 2021-07-20 | 2022-09-30 | 北京合力奇点科技有限公司 | Flow-regulating water-controlling acidizing well completion device for oil-gas well and use method |
| CN115199244A (en) * | 2022-07-18 | 2022-10-18 | 陈彦洪 | Self-adaptive flow control water device and using method thereof |
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