CN106917614B - Injection well downhole flow regulator, injection well downhole flow regulator water nozzle determination method and water injection string - Google Patents
Injection well downhole flow regulator, injection well downhole flow regulator water nozzle determination method and water injection string Download PDFInfo
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- CN106917614B CN106917614B CN201511001277.7A CN201511001277A CN106917614B CN 106917614 B CN106917614 B CN 106917614B CN 201511001277 A CN201511001277 A CN 201511001277A CN 106917614 B CN106917614 B CN 106917614B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 582
- 238000002347 injection Methods 0.000 title claims abstract description 186
- 239000007924 injection Substances 0.000 title claims abstract description 186
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 claims description 42
- 238000005259 measurement Methods 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 31
- 230000008859 change Effects 0.000 description 10
- 239000003129 oil well Substances 0.000 description 9
- 238000004088 simulation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 235000020681 well water Nutrition 0.000 description 5
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Nozzles (AREA)
Abstract
The present invention provides a kind of injection well downhole flow regulator, the determination method of the water nozzle of injection well downhole flow regulator and water injection string, injection well downhole flow regulators, comprising: the first cylinder has apopore；Second cylinder has inlet opening, and the second cylinder is connected with the first cylinder, and one end of the second cylinder extends in the first cylinder；Interconnecting part, one end of interconnecting part are set on the first cylinder and are connected with the second cylinder, and the other end of interconnecting part is connected with apopore；Water entering section is connected with the first intracorporal one end that be located at of the second cylinder, and water entering section is connected to form the first water filling flow path with apopore by the second cylinder, interconnecting part；Outlet part is connected with one end of the separate water entering section of the second cylinder, and the inner cavity of the first cylinder is connected to form the second water filling flow path being isolated with the first water filling flow path with outlet part by inlet opening.Water injection well surveys the problem of adjusting low efficiency in the prior art for effective solution of the present invention.
Description
Technical field
The present invention relates to oil field well water filling and tune field is surveyed, in particular to a kind of injection well downhole flow regulator, the water nozzle of injection well downhole flow regulator
Determination method and water injection string.
Background technique
1, water nozzle surveys conditioning technology status: oil-field flooding has continued decades, and water flooding regime experienced commingled water injection, layering note
Water.Seperated layer water injection experienced: hollow water distribution → integrated form with one heart → eccentric center water-distributing → bridge-type eccentric water distribution → integrated test tune is (empty
Heart integrated test tune, eccentric integrated test tune) conversion.Though having continued decades, water nozzle select permeability restricts always water filling
Well surveys quenched amount and efficiency (water nozzle is out of tune always with inaccurate, water), and " water injection well dispenses construction operation rule to petroleum industry standard
The journey and quality evaluating method " criterion qualified to the water filling of single layer section day are as follows: for enhancement layer, day, reality fluence was in day injection allocation
+ 30%~-10% range is qualified layer；For limiting layer, day reality fluence be in the range of+10%~-the 30% of day injection allocation
Day qualified layer；For taking over layer, day reality fluence be day qualification layer in the range of ± the 10% of day injection allocation.Although range is very wide,
But existing water nozzle measuring and regulating method remains difficult to meet, is difficult to be registrated water nozzle.Current water nozzle selection method be each layer primary election water nozzle (with
Experience or water nozzle plate) → actual measurement each laminar flow amount → apply formula (1), carry out each layer water nozzle adjustment.Wherein, formula (1) is warp
Value is tested, i.e. hypothesis background pressure is constant, but each laminar flow amount and background pressure correspond, and changes in flow rate background pressure necessarily becomes
Change, i.e., this formula (1) is wrong.
Wherein: σ is correction factor, is 0.9 for limitation layer coefficients, enhancement layer 1.1, equalizing layer 1.0, d1For raw water
Mouth, Q2Water, Q are surveyed for the second water filling flow path1To require with fluence, d2For required tap diameter.
In existing water injection technology, each layer needs multiple pulling mouthpiece Approach by inchmeal that injection allocation requirement just can be roughly satisfied, and works as layer
Examination, which selects water nozzle at all, when number more (3 layers or more) cannot achieve effectively layering water distribution.Water nozzle choosing is not allowed to be that serious restrict fills the water row
Industry development restricts water-injection efficiency, restricts block injection-production ratio.
Although traditional eccentric injection mandrel has nozzle loss curve can be according to (SY/T5906-2003) as shown in Figure 1, there are mouth diameters
Interval big (1mm~3mm is the most frequently used water nozzle section, and water nozzle interval is big), small flow (30m3/ d or less) in the case of it is substantially countless
According to etc. drawbacks, scene still need to largely try select a water nozzle, further according to each layer measured discharge carry out Approach by inchmeal needed for tap diameter,
Tap diameter i.e. still determining according to sharp-tongued plate is still inaccuracy.It is selected in the prior art without a kind of effective water nozzle
Selection method can guarantee that each layer water nozzle is once chosen successfully.
Summary of the invention
The main purpose of the present invention is to provide a kind of injection well downhole flow regulator, the determination method of the water nozzle of injection well downhole flow regulator and water injection string,
Low efficiency is adjusted to solve the problems, such as that water injection well is surveyed in the prior art.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of injection well downhole flow regulator, comprising: the first cylinder,
With apopore；Second cylinder has inlet opening, and the second cylinder is connected with the first cylinder, and one end of the second cylinder extends
To the first cylinder；Interconnecting part, one end of interconnecting part are set on the first cylinder and are connected with the second cylinder, interconnecting part it is another
One end is connected with apopore；Water entering section is connected with the first intracorporal one end that be located at of the second cylinder, and water entering section passes through the
Two cylinders, interconnecting part are connected to form the first water filling flow path with apopore；Outlet part, with the separate water entering section of the second cylinder
One end is connected, and inner cavity, the inlet opening of the first cylinder are connected to form be isolated with the first water filling flow path the with outlet part
Two water filling flow paths, water entering section are connected with inner cavity；It wherein, can be by adjusting water entering section or outlet part so that second fills the water flow path
The pressure in the exit of the pressure in exit and the first water filling flow path is adapted with actually required background pressure.
Further, water entering section includes: the first inlet segment；First water exit end, one end of the first water exit end and the first water inlet
Section is connected, and the other end of the first water exit end is connected with the second cylinder and is connected with interconnecting part；First water nozzle, removably
It is set to the junction of the first inlet segment and the first water exit end.
Further, outlet part includes: the second inlet segment, is connected with the second cylinder and passes through inlet opening and water entering section phase
Connection；Second water exit end is connected with one end of the separate water entering section of the second inlet segment；Second water nozzle, is removable installed in
The junction of second inlet segment and the second water exit end.
Further, it is spaced between the outer wall for protruding into first intracorporal one end of the second cylinder and the inner wall of the first cylinder
It is arranged to form accommodating chamber, outlet part is connected by inlet opening with accommodating chamber, water entering section.
Further, injection well downhole flow regulator further include: connector is set in the second cylinder, one end and the water entering section phase of connector
Connection, the other end of connector are connected with outlet part, are provided with O-ring seal on the outer peripheral surface of connector.
Further, injection well downhole flow regulator further includes flowmeter, and flowmeter includes: first flowmeter, has traffic ingress, is set to
The pressure in the exit on water entering section and for measuring the first water filling flow path；Second flowmeter has flowexit, is set to out
The pressure in the exit in water portion and for measuring the second water filling flow path.
According to another aspect of the present invention, a kind of water injection string, including injection well downhole flow regulator are provided, injection well downhole flow regulator is above-mentioned water distribution
Device.
According to a further aspect of the invention, a kind of determination method of the water nozzle of injection well downhole flow regulator is provided, injection well downhole flow regulator is above-mentioned
Injection well downhole flow regulator, injection well downhole flow regulator has the first water nozzle and the second water nozzle, and the determination method of the water nozzle of injection well downhole flow regulator includes determining the first water nozzle
With the aperture of the throttling passage of one of the second water nozzle comprising following steps:
Step S1: according to the injection well downhole flow regulator measurement producing well before the water nozzle of setting injection well downhole flow regulator under the flow of injection different fluid
Background pressure value, simulate the second background in the first background pressure curve in the first water filling flow path and the second water filling flow path
Pressure curve；
Step S2: it according to the first background pressure curve and the second background pressure curve, calculates separately out and is actually implanted into fluid
The background pressure in the exit of background pressure and the second water filling flow path when flow at the first water filling flowing path outlet；
Step S3: according to the background in the exit of the background pressure in the exit of the first water filling flow path and the second water filling flow path
Pressure loss value in pressure and the pressure loss value and the second water filling flow path of the first water filling flow path, determines injection well downhole flow regulator entrance
The gross pressure at place fills the water at flow path middle outlet according to gross pressure and the background pressure in the exit of the first water filling flow path or second
Background pressure calculate injection well downhole flow regulator pressure difference, by pressure difference calculate the first water nozzle throttling passage aperture or the second water nozzle
Throttling passage aperture.
Further, in step S3 further include:
Step S31: according to the different pore size of the first water nozzle of injection well downhole flow regulator or the throttling passage of the second water nozzle, different overcurrents
Amount calculates separately out fluid pressure and fluid before through the section before corresponding throttling passage and passes through after corresponding throttling passage
Pressure after section, as difference to obtain water nozzle simulated pressure poor for pressure after pressure and section before saving, by aperture, inflow-rate of water turbine and water nozzle simulation pressure
Power difference carries out nozzle loss curve fitting.
Further, in step S3 further include:
Step S32: according to pressure difference using nozzle loss curve calculate the first water nozzle throttling passage aperture or the second water
The aperture of the throttling passage of mouth.
Further, nozzle loss curve are as follows:
Wherein,
S1 is the cross-sectional area in the aperture of the first water nozzle or the second water nozzle；
S2 is the cross-sectional area of the first water nozzle or the second water nozzle；
P is pressure difference；
ρ is injection fluid density；
μ 1 is to enter the flow velocity before the first water nozzle or the second water nozzle into the fluid of injection well downhole flow regulator.
Further, pressure loss value includes linear loss value of the fluid in the first water filling flow path and the second water filling flow path
With the water nozzle penalty values of the first water nozzle and the second water nozzle.
Further, further include before step S3 first water filling flow path inlet and second water filling flow path entrance
The calculating step of the pressure at place, wherein first water filling flow path injection well downhole flow regulator inlet pressure be Pm, Pm=P11+P12+P1,
The pressure of the injection well downhole flow regulator inlet of second water filling flow path is Pn, Pn=P21+P22+P2, wherein
P11 is the linear loss value in the first water filling flow path；
P12 is the water nozzle penalty values in the first water filling flow path；
P1 is the background pressure in the exit of injection well downhole flow regulator in the first water filling flow path of field measurement out；
P21 is the linear loss value in the second water filling flow path；
P22 is the water nozzle penalty values in the second water filling flow path；
P2 is the background pressure in the exit of injection well downhole flow regulator in the second water filling flow path of field measurement out.
Further, gross pressure P ', and, P '=max (Pm, Pn), P=| Pm-Pn |, wherein
Pm is the pressure of the injection well downhole flow regulator inlet of the first water filling flow path；
Pn is the pressure of the injection well downhole flow regulator inlet of the second water filling flow path；
P is pressure difference.
Further, the determination method of the water nozzle of injection well downhole flow regulator is suitable for integrated injection well downhole flow regulator, eccentric injection mandrel and hollow with one heart
The determination of the water nozzle of injection well downhole flow regulator.
It applies the technical scheme of the present invention, passes through the first cylinder of setting, the second cylinder, water entering section and outlet part.Wherein,
First cylinder has apopore, and there is the second cylinder the second cylinder of inlet opening to be connected with the first cylinder, and the one of the second cylinder
End extends to the interconnecting part being connected in the first cylinder and with the second cylinder.Water entering section is by the second cylinder, interconnecting part and goes out
Water hole is connected to form the first water filling flow path, and the inner cavity of the first cylinder is connected to be formed and the with outlet part by inlet opening
The second water filling flow path that one water filling flow path is isolated.It wherein, can be by adjusting the water entering section or the outlet part so that described
The pressure in the exit of the pressure in the exit of the second water filling flow path and the first water filling flow path meets actually required background pressure
Power is adapted.The the first water filling flow path and the second water filling flow path having by using injection well downhole flow regulator in the technical program carry out oil well
Water filling, can efficiently realize the water injection work of oil well, greatly improve water injection well and survey the efficiency for adjusting operation.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows nozzle loss curve schematic diagram in the prior art；
Fig. 2 shows the schematic perspective views of the embodiment of injection well downhole flow regulator according to the present invention；
Fig. 3 shows the cut-away section structural schematic diagram in Fig. 2；
Fig. 4 shows the schematic perspective view of the embodiment of the injection well downhole flow regulator with flowmeter；
Fig. 5 shows the cut-away section structural schematic diagram in Fig. 4；
Fig. 6 shows the structural schematic diagram at the first visual angle of the embodiment of water nozzle；
Fig. 7 shows the structural schematic diagram at the second visual angle of the embodiment of water nozzle；
Fig. 8 show water nozzle aperture, oil well water injection flow, injection well downhole flow regulator outlet three parameter of pressure difference matched curve figure；
Fig. 9 shows the measured drawing of fluid flow and back pressure curve in the first water filling flow path；
Figure 10 shows the matched curve figure of fluid flow and back pressure curve in the first water filling flow path；
Figure 11 shows the measured drawing of fluid flow and back pressure curve in the second water filling flow path；
Figure 12 shows the matched curve figure of fluid flow and back pressure curve in the second water filling flow path；
Figure 13 shows the measured drawing of fluid flow and back pressure curve in the first water filling flow path in another embodiment；And
Figure 14 shows the measured drawing of fluid flow and back pressure curve in the second water filling flow path in another embodiment.
Wherein, the above drawings include the following reference numerals:
10, the first cylinder；11, apopore；20, the second cylinder；21, inlet opening；22, interconnecting part；23, accommodating chamber；30, into
Water portion；31, the first inlet segment；311, filtration hole；32, the first water exit end；321, the water outlet of the first water exit end；33, the first water
Mouth；331, the first water nozzle body；332, throttling passage；40, outlet part；41, the second inlet segment；411, water inlet；42, second goes out
Water section；421, the water outlet of the second water exit end；43, the second water nozzle；50, flowmeter；51, first flowmeter；511, traffic ingress；
52, second flowmeter；521, flowexit.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 2 and 3, according to one embodiment of present invention, a kind of injection well downhole flow regulator is provided, which includes the
One cylinder 10, the second cylinder 20, interconnecting part 22, water entering section 30 and outlet part 40.First cylinder 10 has apopore 11.Second
Body 20 has inlet opening 21, and the second cylinder 20 is connected with the first cylinder 10, and one end of the second cylinder 20 extends to first
In body 10.One end of interconnecting part 22 is set on the first cylinder 10 and is connected with the second cylinder 20, the other end of interconnecting part 22
It is connected with apopore 11.Water entering section 30 is connected with the one end of the second cylinder 20 being located in the first cylinder 10, water entering section 30
It is connected by the second cylinder 20, interconnecting part 22 with apopore 11 to form the first water filling flow path.Outlet part 40 and the second cylinder
One end of 20 separate water entering section 30 is connected, and inner cavity, the inlet opening 21 of the first cylinder 10 are connected to be formed with outlet part 40
The second water filling flow path being isolated with the first water filling flow path, water entering section 30 are connected with inner cavity.It wherein, can be by adjusting water entering section
30 or outlet part 40 so that second water filling flow path exit pressure and first water filling flow path exit pressure and reality
Required background pressure is adapted.
In the present embodiment, the first water filling flow path and the second water injection manifold having by using injection well downhole flow regulator in the technical program
Road fills the water oil well, can efficiently realize the water injection work of oil well, greatly improves water injection well and surveys the effect for adjusting operation
Rate.
Wherein, water entering section 30 includes the first inlet segment 31, the first water exit end 32 and the first water nozzle 33.First water exit end 32
One end is connected with the first inlet segment 31, the other end of the first water exit end 32 be connected with the second cylinder 20 and with 22 phase of interconnecting part
Connection, the first water exit end 32 have water outlet 321.First water nozzle 33 is removable installed in the first inlet segment 31 and the first water outlet
The junction of section 32 is provided with filtration hole 311 on first inlet segment 31.Setting can easily realize the first water nozzle 33 in this way
Replacement adjustment, wherein the first water nozzle 33 includes the first water nozzle body 331, is provided with throttling passage 332 in the first water nozzle body.
Likewise, outlet part 40 includes the second inlet segment 41, the second water exit end 42 and the second water nozzle 43.Second inlet segment 41 and second
Cylinder 20 is connected and is connected by inlet opening 21 with the inner cavity of the first cylinder 10, water entering section 30 with in the first cylinder 10
Chamber is connected, i.e., the inlet of the first water filling flow path and the second water filling flow path is connected to logical, with the same water inlet, enters water
The pressure that mouth goes out is identical.Second water exit end 42 is connected with one end of the separate water entering section 30 of the second inlet segment 41, the second water inlet
There is water inlet 411 in section 41.Second water nozzle 43 is removable installed in the connection of the second inlet segment 41 and the second water exit end 42
Place, the second water exit end 42 have water outlet 421.In this way setting be equally facilitate realize the first water nozzle 33 replacement adjustment, and
It can be good at realizing that water entering section 30 and outlet part 40 realize water filling to oil well.Especially in horizontal well, using the present embodiment
In injection well downhole flow regulator flood effectiveness more preferably.Wherein, it is provided between water entering section 30 and outlet part 40 for being connected and fixed water entering section 30
With the connector of outlet part 40, connector is set in the second cylinder 20, one end of connector and the first water outlet of water entering section 30
Section 32 is connected, and the other end of connector is connected with the second inlet segment 41 of outlet part 40, is arranged on the outer peripheral surface of connector
There is O-ring seal.I.e. by adjusting the first water nozzle 33, the second water nozzle 43, reach the exit for making the second water filling flow path
The pressure and the amount of being actually implanted into the exit of pressure and the first water filling flow path, required background pressure are adapted purpose.
First water exit end 32 and the opposite end of the second inlet segment 41 are sealing state.It is of course also possible to go out first
Isolation part is set between water section 32 and the opposite end of the second inlet segment 41, so as to enter the second cylinder from the first inlet segment 31
Fluid inside 20 is separated by with the fluid entered from the second inlet segment 41 to be left.In the present embodiment, mainly pass through connector
First water exit end 32 and the second inlet segment 41 are kept apart, to guarantee the fluid of the first water filling flow path and the stream of the second water filling flow path
Body mutually realizes independent water filling.
As shown in figure 3, the outer wall for protruding into one end in the first cylinder 10 of the second cylinder 20 and the inner wall of the first cylinder 10
Between interval setting to form accommodating chamber 23, outlet part 40 is connected to form second and fill the water with accommodating chamber 23 by inlet opening 21
A part of flow path.In this way setting can guarantee during water filling, the fluid injected can by accommodating chamber 23 and into
The purpose that water hole 21 is smoothly flowed out from outlet part 40 to realize water filling.
Wherein it is possible to water entering section 30 is disposed entirely in the accommodating chamber 23 that the first cylinder 10 and the second cylinder 20 are formed,
It is of course also possible to which the setting of 30 part of water entering section in accommodating chamber 23 and is extended to outside the first cylinder 10, energy is set in this way
It is enough so that water entering section 30 unexpectedly may more than contacted with the fluid in pipeline, thus enhancing the first water filling flow path flood effectiveness.Equally
Ground, outlet part 40 can also be completely set up in the second cylinder 20, and certainly, outlet part 40 can also be that part is set to second
In cylinder 20, the second water exit end extends to the outside of the second cylinder 20, is arranged equally valid enhances the second water filling flow path in this way
Flood effectiveness.
As shown in Figure 4 and Figure 5, in the second embodiment of the present invention, injection well downhole flow regulator further includes flowmeter 50.Flowmeter 50 can
It is releasably set on water entering section 30 and outlet part 40.Of course, it is possible to which as needed, flowmeter 50 can also be positioned only at into water
In one of portion 30 and outlet part 40.Wherein, flowmeter 50 includes first flowmeter 51 and second flowmeter 52.First flowmeter 51
With traffic ingress 511, it is set to the pressure in the exit on water entering section 30 and for measuring the first water filling flow path.Second flow
Meter 52 has flowexit 521, is set to the pressure in the exit on outlet part 40 and for measuring the second water filling flow path.At this
In embodiment, directly first flowmeter 51 and the first water nozzle 33 can be replaced, second flowmeter 52 and the second water nozzle 43 are replaced
Replace the position of the first water nozzle 33 and the second water nozzle 43.The injection well downhole flow regulator being arranged in this way can be used to measure the water filling pressure in oil well
Power can according to need and be converted.Flowmeter is set on injection well downhole flow regulator, the practicability of injection well downhole flow regulator is increased, so that water filling
Operation is more convenient, efficient.
Injection well downhole flow regulator in above-described embodiment may be also used on water injection string, i.e., in third embodiment according to the present invention,
A kind of water injection string, including injection well downhole flow regulator are provided, injection well downhole flow regulator is the injection well downhole flow regulator in above-described embodiment.
Such as Fig. 6 and Fig. 7, fourth embodiment according to the present invention provides a kind of determination method of the water nozzle of injection well downhole flow regulator, matches
Hydrophone is the injection well downhole flow regulator in above-described embodiment, and injection well downhole flow regulator has the first water nozzle 33 and the second water nozzle 43, and the water nozzle of injection well downhole flow regulator is really
The method of determining include determine the first water nozzle 33 and the second water nozzle 43 one of throttling passage aperture comprising following step
It is rapid:
Step S1: according to the injection well downhole flow regulator measurement producing well before the water nozzle of setting injection well downhole flow regulator under the flow of injection different fluid
Background pressure value, simulate the second background in the first background pressure curve in the first water filling flow path and the second water filling flow path
Pressure curve；
Step S2: it according to the first background pressure curve and the second background pressure curve, calculates separately out and is actually implanted into fluid
The background pressure in the exit of background pressure and the second water filling flow path when flow at the first water filling flowing path outlet；
Step S3: according to the background in the exit of the background pressure in the exit of the first water filling flow path and the second water filling flow path
Pressure loss value in pressure and the pressure loss value and the second water filling flow path of the first water filling flow path, determines injection well downhole flow regulator entrance
The gross pressure at place fills the water at flow path middle outlet according to gross pressure and the background pressure in the exit of the first water filling flow path or second
Background pressure calculates the pressure difference of injection well downhole flow regulator, and aperture or the second water nozzle of the throttling passage of the first water nozzle 33 are calculated by pressure difference
The aperture of 43 throttling passage.Wherein, pressure loss value includes edge of the fluid in the first water filling flow path and the second water filling flow path
The water nozzle penalty values of journey penalty values and the first water nozzle 33 and the second water nozzle 43.
Determine that water nozzle aperture further includes inlet and the second water filling flow path of the first water filling flow path before step S3
The calculating step of the pressure of inlet, wherein the pressure of the injection well downhole flow regulator inlet of the first water filling flow path is Pm, Pm=P11+P12+
The pressure of P1, the injection well downhole flow regulator inlet of the second water filling flow path are Pn, Pn=P21+P22+P2, wherein P11 is the first water filling flow path
In linear loss value, P12 be first water filling flow path in water nozzle penalty values, P1 be field measurement go out first water filling flow path in
The background pressure in the exit of injection well downhole flow regulator, P21 are the linear loss value in the second water filling flow path, and P22 is in the second water filling flow path
Water nozzle penalty values, P2 be field measurement go out second water filling flow path in injection well downhole flow regulator exit background pressure.It determines at this time
Gross pressure P ', P '=max (Pm, Pn), i.e. gross pressure take pressure at inlet in the first water filling flow path or the second water filling flow path maximum
One, P=| Pm-Pn |, i.e., pressure difference is wherein pressure at inlet difference in the first water filling flow path and the second water filling flow path
Absolute value.Wherein, Pm is the pressure of the injection well downhole flow regulator inlet of the first water filling flow path, and Pn is the injection well downhole flow regulator entrance of the second water filling flow path
The pressure at place, P are pressure difference.
In step S3 further include:
Step S31: according to the different pore size of the first water nozzle 33 of injection well downhole flow regulator or the throttling passage of the second water nozzle 43, different mistakes
Flow calculates separately out fluid pressure and fluid before the section before accordingly by throttling passage and passes through after corresponding throttling passage
Section after pressure, as difference to obtain water nozzle simulated pressure poor for pressure after pressure and section before saving, by the simulation of aperture, inflow-rate of water turbine and water nozzle
Pressure difference carries out nozzle loss curve fitting.Specific approximating method is as follows:
The tap diameter of 0.8mm is established, inflow-rate of water turbine is to 5m3/ d can generate a pressure difference before and after water nozzle at this time；
Tap diameter 0.8mm is constant, and change water nozzle inflow-rate of water turbine is 7m3/ d can generate another pressure before and after water nozzle at this time
Difference；
Tap diameter 0.8mm is constant, and change water nozzle inflow-rate of water turbine is 9m3/ d can generate another pressure before and after water nozzle at this time
Difference；
Changing tap diameter becomes 1mm, and giving water nozzle inflow-rate of water turbine at this time is 5m3/ d can generate one before and after water nozzle at this time
Pressure difference；
Tap diameter 1mm is constant, and change water nozzle inflow-rate of water turbine is 7m3/ d can generate another pressure difference before and after water nozzle at this time；
Tap diameter 1mm is constant, and change water nozzle inflow-rate of water turbine is 9m3/ d can generate another pressure difference before and after water nozzle at this time；
Tap diameter 1mm is constant, and change water nozzle inflow-rate of water turbine is 20m3/ d can generate another pressure before and after water nozzle at this time
Difference；
The tap diameter of 6.2mm is established, inflow-rate of water turbine is to 20m3/ d can generate a pressure difference before and after water nozzle at this time；
Tap diameter 6.2mm is constant, and change water nozzle inflow-rate of water turbine is 30m3/ d can generate another pressure before and after water nozzle at this time
Difference；
Tap diameter 6.2mm is constant, and change water nozzle inflow-rate of water turbine is 40m3/ d can generate another pressure before and after water nozzle at this time
Difference；
Tap diameter 6.2mm is constant, and change water nozzle inflow-rate of water turbine is 200m3/ d can generate another pressure before and after water nozzle at this time
Power is poor.
That is first tap diameter can all give flow step, go to simulate, pressure caused by water nozzle under the conditions of different inflow-rate of water turbines
Power is poor.
Water nozzle range 0.8mm~6.2mm, mouth diameter interval: 0.1mm~0.2mm.The overcurrent limits in each aperture: 5m3/d
~200m3/ d is differed, flow intervals: 2m3~5m3Differ.By the flow of formation, pressure difference, pore size data, carry out curve fitting,
It obtains fitting formula, directly calculates required water nozzle, guarantee the primary success of multichannel water nozzle selection.
By water nozzle practical structures be respectively completed under the modeling of 0.8mm~6.2mm water faucet structure, grid dividing and every kind of structure from
5m3/ d~200m3Pressure difference simulation under/d difference tap diameter, different inflow-rate of water turbines.
Water nozzle is sudden contraction pipe structure, if it is u1 that fluid, which enters the speed before water nozzle, fluid flow velocity after contracted section is
U2, Partial Resistance coefficient, water nozzle front and back area carry out no quantization processing and obtain 2,3 liang of formulas:
416 groups of data of simulation are subjected to (2), the processing of (3) formula nondimensionalization, complete CDWith the power exponent fitting such as Fig. 8 of A
It is shown.
Obtain the fitting formula of faucet:
After optimizing,
Wherein,
S1 is the cross-sectional area in the aperture of the first water nozzle 33 or the second water nozzle 43, and S2 is the first water nozzle 33 or the second water nozzle
43 cross-sectional area；P is pressure difference；ρ be injection fluid density, μ 1 be into injection well downhole flow regulator fluid enter the first water
Mouth
33 or the second flow velocity before water nozzle 43.
Step S32: the aperture or second of the throttling passage of the first water nozzle 33 is calculated using nozzle loss curve according to pressure difference
The aperture of the throttling passage of water nozzle 43.As seen from the above equation, it is known that any two parameter can easily find out another parameter.
Can be seen that pressure difference P from 4 formulas it is known that ρ it is known that μ 1 it is known that the cross-sectional area of i.e. S2 water nozzle it is known that can
The cross-sectional area for finding out the aperture S1 can both find out the diameter or radius in aperture in the relationship according to cross-sectional area and radius.
To meet horizontal well or straight well seperated layer water injection requirement, integrated form concentric roater regulator is completed in design, and major function is
By the moisture in oil pipe at two-way, i.e., the first water filling flow path and the second water filling flow path.First water injection manifold routing water filling fuse filter opening
That is water entering section 30 enters the first water filling flow path after the first water nozzle 33, and the second water filling flow path is through water filling fuse and seating nipple
After annular space, it is discharged bridge, that is, interconnecting part 22 around the first water filling flow path, water filling fuse is entered by water filling cartridge lower inlet opening
That is outlet part 40 enters oil pipe, injection the second water filling flow path through second water filling flow path water nozzle i.e. the second water nozzle 43.
To measure while completing two layers of water injection pressure, flow, design is completed two layers of independent collecting type meter and is had
There is the injection well downhole flow regulator of flowmeter.Wherein the first water filling flow path flow is entered by the traffic ingress 511 of first flowmeter 51, through first-class
The first water filling flow path is flowed into from injection well downhole flow regulator upper water-out hole 11 after meter 51, the second water filling flow path flow is bypassed via accommodating chamber 23
After interconnecting part 22, flowed into the second inlet segment 41 of outlet part 40 via the inlet opening 21 of the second cylinder 20, then through second flow
The flowexit 521 of meter 52 flow to the second water filling flow path.
Since the effect of injection well downhole flow regulator is exactly that different waters is injected separately into the first water filling flow path, the second water filling flow path, stream
It is different to measure different background pressure, and background pressure is related with formation porosity permeability, flow more overall background pressure is bigger, flatly
Well be not acidified, fracturing work when, the background pressure under different flow tends to be constant for a long time.That is usual conditions
Under, 50m is infused in layer position3Background pressure than infuse 30m3When background pressure it is big, i.e., each layer background pressure is solid under different waters
Definite value needs to carry out the well water suction indicative curve test before water distribution, determine the first water filling flow path injection well downhole flow regulator exit pressure P1,
P2.Since water distribution is that an entirety, a pressure system will consider the first water filling flow path, the second water filling flow path water outlet pressure comprehensively
The gross pressure of power, that is, background pressure, flow and injection well downhole flow regulator entrance.Pressure after reduction mouth, makes while the effect of water nozzle is exactly current limliting
Obtain pressure needed for each outlet pressure is equal to the amount of being actually implanted into.Entire injection well downhole flow regulator present position pressure system crushing analysis, such as table 1
It is shown:
The distribution of 1 injection well downhole flow regulator crushing of table
Since injection well downhole flow regulator is an entirety, that is, have: P=P11+P12+P1=P21+P22+P2.
Pressure difference is mainly generated by two parts for integrated form concentric roater regulator.First: flow channels generate pressure difference and are
First water filling flow path and second water filling flow path, at this time be free of water nozzle, second: water nozzle pressure difference.When fluid is with certain flow velocity and pressure
When force flow enters injection well downhole flow regulator, for the first water filling flow path: gross pressure cuts the pressure for being dissipated in the first water injection manifold road, subtracts
First water filling flow path water nozzle crushing is equal to the background pressure at the first water filling flowing path outlet.For the second water filling flow path: total
Pressure cuts the pressure for being dissipated in the second water injection manifold road, subtracts the second tunnel water filling flow path water nozzle crushing, is equal to the second water injection manifold
Background pressure at way outlet, the i.e. essence of layering water distribution are to go balance two places interlayer pressure poor by water nozzle.
Wherein P1 and P2 is known by measuring in water suction indicative curve continuous mode.And each flow path edge under the conditions of different waters
Journey loss P11, P21 can be obtained by simulation, it is assumed that the water nozzle of second channel is artificially selected, and is pressure difference since flow determines
P22 determines that then P21+P22+P2=P, injection well downhole flow regulator entrance stagnation pressure can be found out, then the sharp-tongued value P12 of the water nozzle of another flow path can also
With determination.Key is how by the water amount in the channel, water nozzle chock pressure difference value to calculate required water nozzle aperture.Equally, instead
Come over, it is known that how aperture of water nozzle, flow calculate pressure difference caused by the water nozzle, need to carry out different pore size, not cocurrent flow
One group of database is established in water nozzle pressure difference simulation under amount, and to pressure difference, aperture, three parameter of flow in database, it is quasi- to carry out curve
It closes, determines another variable purpose by any two known variables to reach.
Each layer water suction indicative curve measurement of degression type step by step, carries out each laminar flow of full well using 3 points~5 variable-flow methods and measures
Examination is the measurement of flow, background pressure.And the curve of the flow of each road water suction, background pressure is drawn, it finds out each layer and is actually implanted into
Back pressure value under the conditions of amount.
Crushing sunykatuib analysis under each flow path different flow analyzes whole water-distributing tool using three-dimensional software: will
Three-dimensional injection well downhole flow regulator hydraulic model imports ansys workbench application mesh and carries out grid dividing, the injection well downhole flow regulator feelings after division
Condition such as, amounts to more than 200 ten thousand more than 20 Wan Jiedian of unit, using fluent pro rate module, sets entrance total flow, warp
Calculate pressure loss value P11, P21 that can be found out under each flow path different flow.
Wire Launching and Bailing mode is used to complete horizontal well seperated layer water injection in order to realize, by injection well downhole flow regulator tripping in straight well section, Quan Jingfen
Layer water injection string structure is respectively as follows: guide head, perforated pipe, ball seat, centralizer, Y441 packer, centralizer, safety from the bottom to top
Connector, lower telescoping tube, injection well downhole flow regulator, Y341 packer, hydraulic anchor include upper and lower anchor fluke, upper telescoping tube composition.The well top uses
31/2 " UP TBG, lower part use 27/8 " UP TBG.
To complete seperated layer water injection, it is necessary to acquire the background pressure under each layer actual flow.Practical injection well downhole flow regulator according to the present invention
Design feature, using two packer flowmeters, two layers of flow, pressure with mode of surveying, the background pressure carried out under different flow is surveyed
Amount.Water filling fuse is arranged on injection well downhole flow regulator with flowmeter, in order to take the background pressure under the full well different flow, full well is pressed
120m3/d、100m3/d、80m3/d、60m3/d、40m35 systems of/d are filled the water, first flowmeter 51, second flowmeter 52
The flow background pressure curve in one group of water filling flow path of injection first, flow background pressure in injection the second water filling flow path are measured respectively
Force curve, flowmeter play back the well first water filling flow path, second water filling flow path actual flow and background pressure curve such as Fig. 9,
Shown in 11.
Such as flow 55m at 01 in Fig. 93/ d, pressure 75.05MPa；Flow 43.1m at 023/ d, pressure 73.47MPa；At 03
Flow 33.8m3/ d, pressure 71.57MPa；Flow 24.2m at 043/ d, pressure 69.72MPa；Flow 12.4m at 053/ d, pressure
65.52MPa.By 01,02,03,04,05 flow pressure numerical value, the first water filling flow path flow is carried out, back pressure curve matching is schemed
In 10 shown in curve.
Flow 69.8m at 01 in Figure 113/ d, pressure 75.03MPa；Flow 57.94m at 023/ d, pressure 73.42MPa；03
Locate flow 48.76m3/ d, pressure 71.55MPa；Flow 39.4m at 043/ d, pressure 69.68MPa；Flow 23.84m at 053/ d,
Pressure 65.47MPa.By 01,02,03,04,05 flow pressure numerical value, it is quasi- to complete the second water filling flow path flow, back pressure curve
It closes, as shown in figure 12.
If filling the water flow path injection allocation 50m according to the geologic requirements first of oil well3/ d, the second water filling flow path injection allocation 30m3/ d, by
Fig. 9 fitting formula calculates the first water filling flow path 50m3The background pressure of corresponding second water filling flow path is 74.464MP when/d, by
Figure 11 fitting formula calculates the flow 30m of the second water filling flow path3Corresponding background pressure is 67.231MP when/d.Such as 1 institute of table
Show, applicating fluid simulation softward acquires the first water filling flow path 50m3It is P11=2689.53pa that/d the first water injection manifold path loss, which loses, the
Two water filling flow path 30m3It is P21=468.83pa that/d the second water injection manifold path loss, which loses, and background pressure, pass loss are inserted table 2.By
Flow path not suck-back is filled the water in the well first.Consider for energy conservation, under the conditions of meeting injection pressure, as far as possible with small injection pressure
Injection.Water nozzle limitation is not added in first water filling flow path, and by the first water filling circuit pressure, calculating injection well downhole flow regulator inlet total pressures is P=
74.5MPa the chock pressure difference that then the second water filling flow path water nozzle need to generate P22=P-P21-P2=7.24MPa at this time could be protected
Card water nozzle can balance the background pressure under two-way different flow.Second water filling flow path is obtained by the nozzle loss curve formula 4 being fitted
Required tap diameter is 2.26mm.Design parameter value is as shown in table 2:
The selection of 2 water nozzle of table and process data table
According to another embodiment of the invention, due to not having 2.26mm mouthpiece, the second water filling flow path can only install 2.3mm additional
Water nozzle.Water distributing core connection packer flowmeter is simultaneously seated in seating nipple, the practical water injection rate 78.5m in ground3/ d measures the first water filling
Flow path water injection rate is 47.6m3/ d, the second water filling flow path is 32.0m3/ d meets injection allocation requirement, the primary chosen successfully, multilayer of water nozzle
Injection allocation control errors are 6% hereinafter, two flow measurements, which obtain full well water amount, amounts to 79.6m3/ d, whole flowmeter error 1.1m3/
d.First water filling flow path, the second water filling flow path measured discharge curve are as shown in Figure 13,14.
Using the determination method of the distributing tap, it can be realized water nozzle and be once chosen to power 100%.Multilayer injection allocation error control
It makes 6% hereinafter, relative to 40% standard error in water filling specification, water distribution precision improves nearly 10 times.
Injection well downhole flow regulator water nozzle selection method of the invention can apply to hollow distributor, eccentric injection mandrel, bridge-type eccentric equal part
In layer water-distributing tool, this method, which surveys whole nation water filling, adjusts industry that will generate major transformation, and the water nozzle of decades is allowed to select dirt is sick to obtain
To solve, water nozzle selection is allowed to have something to base on, it is reasonable can be according to.
In the above-described embodiments, pressure loss value include fluid in the first water filling flow path and the second water filling flow path along journey
The water nozzle penalty values of penalty values and the first water nozzle 33 and the second water nozzle 43.Wherein, the first background pressure curve are as follows:
y1=-0.0032x1 2+0.4345x1+ 60.739,
Second background pressure curve are as follows:
y2=-0.0019x2 2+0.3864x2+ 57.349,
Wherein, x1For the flow for injecting fluid in the first water filling flow path；y1For background pressure.x2For in the second water filling flow path
Inject the flow of fluid；y2For background pressure.
It further include the inlet that flow path is filled the water to the inlet of the first water filling flow path and second before calculating gross pressure
The calculating step of pressure, wherein the pressure of the inlet of the first water filling flow path is Pm, Pm=P11+P12+P1, the second water injection manifold
The pressure of the inlet on road is Pn, Pn=P21+P22+P2, wherein P11 is the linear loss value in the first water filling flow path；P12
For the water nozzle penalty values in the first water filling flow path；P1 is the background pressure in the exit of injection well downhole flow regulator in the first water filling flow path；P21 is
Linear loss value in second water filling flow path；P22 is the water nozzle penalty values in the second water filling flow path；P2 is in the second water filling flow path
The background pressure in the exit of injection well downhole flow regulator.Calculation formula about linear loss value:
Reynolds number calculation formula:
Wherein, ReFor Reynolds number, ρ fluid density, v is speed, and d is pipe diameter, and η is fluid viscosity；
Preferably, ρ=1000KG/m3, pipe diameter d=0.018m, η=0.001kg/ms, v=1.365189m/s
Wherein, Re≤ 2320 be laminar flow, 2320≤Re≤ 4000 be turbulent flow,
Water injection rate is 50m3/ d, then calculate Re=24573.4 are turbulent flow.
Linear loss calculation formula when turbulent flow are as follows:
Wherein: △ P is linear loss, and l is tube length, and ρ fluid density, v is speed, and d is pipe diameter, and λ is resistance
Coefficient, ReFor Reynolds number.Wherein, l=0.1m finds out λ=0.02527.
Since pressure difference calculation formula obtains: P=130.8288pa.That is linear loss very little, can be ignored.
Specific linear loss value, i.e. P11, P22 are calculated by the simulation of fluent software.
About software simulation operation step:
Three-dimensional modeling is carried out by injection well downhole flow regulator actual size first, it is also possible to which ansys included gometry is modeled, and is answered
Grid dividing is completed with workbench-mesh.
Into fluent software practical operation, injection well downhole flow regulator entrance is speed entrance, and entrance velocity is actual flow divided by entering
Mouth sectional area, the two all out of flow in outlet, each outlet proportion is specified using flow rate weighting,
Even inlet flow rate is 50m3/ d, it is desirable that the outlet in the first water filling flow path is 30m3Outlet in/d, the second water filling flow path is
20m3/ d is then set in software, the outlet flow rate weighting=0.6 in the first water filling flow path, the second water filling flow path
In outlet flow rate weighting=0.4, and complete to initialize, be calculated, after calculating, application
Report calculate the pressure difference of the outlet and injection well downhole flow regulator entrance in the first water filling flow path, i.e. P11, second fills the water going out in flow path
The pressure difference of mouth and injection well downhole flow regulator entrance, i.e. P22.
Note: when calculating linear loss, water nozzle is not added in injection well downhole flow regulator, and the first water filling flow path and the second water filling flow path are in sky mouth
State.First water filling flow path and the second water filling flow path are respectively used to the upper layer water filling and lower layer's water filling of oil well.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of injection well downhole flow regulator characterized by comprising
First cylinder (10) has apopore (11)；
Second cylinder (20) has inlet opening (21), and second cylinder (20) is connected with first cylinder (10), and institute
The one end for stating the second cylinder (20) extends in first cylinder (10)；
Interconnecting part (22), one end of the interconnecting part (22) be set on first cylinder (10) and with second cylinder
(20) it is connected, the other end of the interconnecting part (22) is connected with the apopore (11)；
Water entering section (30), with second cylinder (20) be located at first cylinder (10) in one end be connected, it is described into
Water portion (30) is connected by second cylinder (20), the interconnecting part (22) with the apopore (11) to form the first note
Water flow road；
Outlet part (40) is connected with one end far from the water entering section (30) of second cylinder (20), and described first
Inner cavity, the inlet opening (21) of body (10) are connected to be formed and be separated by with the first water filling flow path with the outlet part (40)
From the second water filling flow path, the water entering section (30) is connected with the inner cavity；
It wherein, can be by the adjusting water entering section (30) or the outlet part (40) so that the exit of the second water filling flow path
Pressure and the pressure in exit of the first water filling flow path be adapted with actually required background pressure.
2. injection well downhole flow regulator according to claim 1, which is characterized in that the water entering section (30) includes:
First inlet segment (31)；
First water exit end (32), one end of first water exit end (32) are connected with first inlet segment (31), and described
The other end of one water exit end (32) is connected with second cylinder (20) and is connected with the interconnecting part (22)；
First water nozzle (33) is removable installed in the connection of first inlet segment (31) and first water exit end (32)
Place.
3. injection well downhole flow regulator according to claim 1, which is characterized in that the outlet part (40) includes:
Second inlet segment (41) is connected and by the inlet opening (21) and the water entering section with second cylinder (20)
(30) it is connected；
Second water exit end (42) is connected with one end far from the water entering section (30) of second inlet segment (41)；
Second water nozzle (43) is removable installed in the connection of second inlet segment (41) and second water exit end (42)
Place.
4. injection well downhole flow regulator according to claim 1, which is characterized in that second cylinder (20) protrudes into first cylinder
(10) between the outer wall of one end in and the inner wall of first cylinder (10) interval be arranged to be formed accommodating chamber (23), it is described go out
Water portion (40) is connected by the inlet opening (21) with the accommodating chamber (23), the water entering section (30).
5. injection well downhole flow regulator according to claim 1, which is characterized in that the injection well downhole flow regulator further include:
Connector is set in second cylinder (20), and one end of the connector is connected with the water entering section (30), institute
The other end for stating connector is connected with the outlet part (40), is provided with O-ring seal on the outer peripheral surface of the connector.
6. injection well downhole flow regulator according to claim 1, which is characterized in that the injection well downhole flow regulator further includes flowmeter (50), the stream
Meter (50) includes:
First flowmeter (51) has traffic ingress (511), is set on the water entering section (30) and for measuring described first
Fill the water the pressure in the exit of flow path；
Second flowmeter (52) has flowexit (521), is set on the outlet part (40) and for measuring described second
Fill the water the pressure in the exit of flow path.
7. a kind of water injection string, including injection well downhole flow regulator, which is characterized in that the injection well downhole flow regulator is described in any one of claims 1 to 6
Injection well downhole flow regulator.
8. a kind of determination method of the water nozzle of injection well downhole flow regulator, which is characterized in that the injection well downhole flow regulator is any one of claims 1 to 6
The injection well downhole flow regulator, the injection well downhole flow regulator have the first water nozzle (33) and the second water nozzle (43), the determination of the water nozzle of the injection well downhole flow regulator
Method includes determining the aperture of the throttling passage of one of first water nozzle (33) and described second water nozzle (43), packet
Include following steps:
Step S1: according to the injection well downhole flow regulator measurement producing well before the water nozzle that the injection well downhole flow regulator is arranged in the stream for injecting different fluid
Background pressure value under amount simulates the first background pressure curve and the second water filling flow path in the first water filling flow path
In the second background pressure curve；
Step S2: it according to the first background pressure curve and the second background pressure curve, calculates separately out and is actually implanted into
The background pressure in the exit of background pressure and the second water filling flow path at the first water filling flowing path outlet described in when fluid flow
Power；
Step S3: according to the exit of the background pressure in the exit of the first water filling flow path and the second water filling flow path
Pressure loss value in the pressure loss value and the second water filling flow path of background pressure and the first water filling flow path, really
The gross pressure of the fixed injection well downhole flow regulator inlet, according to the background pressure of the gross pressure and the exit of the first water filling flow path
Or the background pressure at the second water filling flow path middle outlet calculates the pressure difference of the injection well downhole flow regulator, is calculated by the pressure difference
The aperture of the throttling passage in the aperture or second water nozzle (43) of the throttling passage of first water nozzle (33), wherein described
Water entering section (30) includes:
First inlet segment (31)；
First water exit end (32), one end of first water exit end (32) are connected with first inlet segment (31), and described
The other end of one water exit end (32) is connected with second cylinder (20) and is connected with the interconnecting part (22)；
First water nozzle (33) is removable installed in the connection of first inlet segment (31) and first water exit end (32)
Place；
The outlet part (40) includes:
Second inlet segment (41) is connected and by the inlet opening (21) and the water entering section with second cylinder (20)
(30) it is connected；
Second water exit end (42) is connected with one end far from the water entering section (30) of second inlet segment (41)；
Second water nozzle (43) is removable installed in the connection of second inlet segment (41) and second water exit end (42)
Place.
9. the determination method of the water nozzle of injection well downhole flow regulator according to claim 8, which is characterized in that also wrapped in the step S3
It includes:
Step S31: according to the different holes of the first water nozzle (33) of the injection well downhole flow regulator or the throttling passage of second water nozzle (43)
It is logical to calculate separately out the fluid pressure and fluid before through the section before corresponding throttling passage for diameter, different inflow-rate of water turbines
Pressure after pressure before the section and the section is obtained water nozzle simulated pressure as difference by pressure after the section after crossing corresponding throttling passage
The aperture, the inflow-rate of water turbine and the water nozzle simulated pressure difference are carried out nozzle loss curve fitting by difference.
10. the determination method of the water nozzle of injection well downhole flow regulator according to claim 9, which is characterized in that in step S3 further include:
Step S32: the throttling passage of first water nozzle (33) is calculated using the nozzle loss curve according to the pressure difference
The aperture of the throttling passage of aperture or second water nozzle (43).
11. the determination method of the water nozzle of injection well downhole flow regulator according to claim 9, which is characterized in that the nozzle loss curve are as follows:
Wherein,
S1 is the cross-sectional area in the aperture of first water nozzle (33) or second water nozzle (43)；
S2 is the cross-sectional area of first water nozzle (33) or second water nozzle (43)；
P is the pressure difference；
ρ is injection fluid density；
μ 1 is that the fluid of the entrance injection well downhole flow regulator enters the flow velocity before first water nozzle (33) or second water nozzle (43).
12. the determination method of the water nozzle of injection well downhole flow regulator according to claim 8, which is characterized in that the pressure loss value packet
Include linear loss value and first water nozzle of the fluid in the first water filling flow path and the second water filling flow path
(33) and the water nozzle penalty values of second water nozzle (43).
13. the determination method of the water nozzle of injection well downhole flow regulator according to claim 8, which is characterized in that further include in the step
The calculating step of the pressure of the inlet of the inlet and the second water filling flow path of the first water filling flow path before S3,
In, the pressure of the injection well downhole flow regulator inlet of the first water filling flow path is Pm, Pm=P11+P12+P1, and described second fills the water flow path
The pressure of injection well downhole flow regulator inlet is Pn, Pn=P21+P22+P2, wherein
P11 is the linear loss value in the first water filling flow path；
P12 is the water nozzle penalty values in the first water filling flow path；
P1 is the background pressure in the exit of injection well downhole flow regulator described in the first water filling flow path of field measurement out；
P21 is the linear loss value in the second water filling flow path；
P22 is the water nozzle penalty values in the second water filling flow path；
P2 is the background pressure in the exit of injection well downhole flow regulator described in the second water filling flow path of field measurement out.
14. the determination method of the water nozzle of injection well downhole flow regulator according to claim 13, which is characterized in that the gross pressure is P ',
And P '=max (Pm, Pn), P=| Pm-Pn |, wherein
Pm is the pressure of the injection well downhole flow regulator inlet of the first water filling flow path；
Pn is the pressure of the injection well downhole flow regulator inlet of the second water filling flow path；
P is the pressure difference.
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| CN106917614A (en) | 2017-07-04 |
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