CN208763634U - A kind of water injection rate automatic control device - Google Patents
A kind of water injection rate automatic control device Download PDFInfo
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- CN208763634U CN208763634U CN201821482103.6U CN201821482103U CN208763634U CN 208763634 U CN208763634 U CN 208763634U CN 201821482103 U CN201821482103 U CN 201821482103U CN 208763634 U CN208763634 U CN 208763634U
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- pressure
- water injection
- injection rate
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- valve
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Abstract
The utility model discloses a kind of water injection rate automatic control devices, the device is by straight pipe, throttle valve, electric operator, pressure auto-controller, needle valve, pressure transmitter or intelligent manometer are constituted, the straight pipe and throttle valve concatenate in the water injecting pipeline, the needle valve is external on the water injecting pipeline, the pressure transmitter or intelligent manometer are installed on the output end of the needle-like valve body, the electric operator is fixed on the throttle valve by terminal pad, the pressure auto-controller is connected by cable with the electric operator, the pressure transmitter or intelligent manometer are connected by signal wire with the pressure auto-controller, probe of ultrasonic flowmeter is installed outside the straight pipe.The utility model greatly reduces the production, use and maintenance cost of water-injection control device, extends its service life, while being also convenient for the Comparison calibration of injection flow, particularly suitable in distributing room for water injection to control water injection rate.
Description
Technical field
The utility model relates to digitize automatic control equipment technical field, more particularly to a kind of water injection rate is controlled automatically
Device processed.
Background technique
Oil-field flooding is in oilfield development process to stratum supplement energy, realization stable high yield, raising oil recovery rate
One of important means, in order to guarantee that flood effectiveness and water-injection efficiency, every mouthful of water injection well should be filled the water according to determining with fluence, this is just
It needs to control water injection rate.Currently, having abandoned traditional flow control in this field is manual adjustment valve opening
The backwardness method of flow is adjusted, and starts widely to realize in such a way that flowmeter, regulating valve are in conjunction with flow quantity control instrument
The automatic control of flow.
Although existing technology realizes the automation of control, but its used automatic control system is to existing pipeline
Modification difficulty is larger, at high cost, passes plus water to flow especially because the hysteresis quality of flowmeter measurement causes frequently to adjust
The erosion of sensor, so cause flowmeter with valve body not only the service life is short, but also safeguard with maintenance complexity, cost it is also high.
Therefore, a kind of water injection rate automatic control device easy for installation, maintenance is simple, reliable for operation is developed, is current
Those skilled in the art's problem to be solved.
Utility model content
In view of this, the present invention provides a kind of water injection rate automatic control devices, every in daily management using filling the water
The moon, the water injection indication curve that must test realized automatic control injection flow, both reduced equipment and installation, use, maintenance at
This, and it is able to satisfy the purpose for accurately controlling injection flow.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of water injection rate automatic control device, the device are installed on water injecting pipeline, by straight pipe, throttle valve, electronic are held
Row mechanism, pressure auto-controller, needle valve, pressure transmitter or intelligent manometer are constituted, the straight pipe and throttle valve string
It accesses in the water injecting pipeline, the needle valve is external on the water injecting pipeline, the pressure transmitter or intelligent manometer
It is installed on the output end of the needle-like valve body, the electric operator is fixed on the throttle valve by terminal pad, electricity
The output shaft of dynamic executing agency is connect with the stem sleeve of the throttle valve, the pressure auto-controller pass through cable with it is described
Electric operator is connected, and the pressure transmitter or intelligent manometer pass through signal wire and the pressure auto-controller phase
Connection, the straight pipe are equipped with probe of ultrasonic flowmeter outside.
Based on the above technical solution, the utility model can also make following improvement:
Preferably, the length of the straight pipe is 10 times or more of its nominal bore, and the preferred smooth in appearance of straight pipe,
The stainless steel making of uniform wall thickness can make its outer diameter, wall thickness dimension accurate it is found that install probe of ultrasonic flowmeter in this way
Carry out measuring flow.
Preferably, the throttle valve selects emery wheel valve, other high pressure resistant, the long-life throttle valves can also be used, for adjusting
Water stream size changes water injection pressure.
Preferably, the electric operator should be able to reliably be coupled with throttle valve, energy fast-acting modulator valve bar, preferably from valve
Full open to the contract fully time be no more than 1-2 minute, equipped with extreme position switch electric operator.
Preferably, the pressure auto-controller includes control and testing board, display panel, key and input/output port, wherein
The display panel includes parameter setting window and measurement window, for showing human-computer interaction interface；The key is for selecting
Or input parameter；The input/output port includes power supply and pressure signal sample port, and the pressure signal sample port is used
In the output signal of the pressure transmitter is converted to digital pressure signal, by the microcomputer reads on the control and testing board.
Preferably, the needle valve is that needle valve is used in general purpose instrument installation.
Preferably, the present apparatus preferably uses the straight pipe for the connection type of the water filling input terminal of device.And the people that works
Member can also use the entrance of the throttle valve for the water filling input terminal of device for the convenience of joint connection in site installation, described straight
Pipeline section is the connection type of the water filling output end of device.
In addition, the utility model additionally provides a kind of water injection rate autocontrol method, comprising the following steps:
1) individual well water injection indication curve is obtained by measurement；
2) according to the water injection indication curve that measures, be segmented with straight line fitting curve, and choose some coordinates and intercept or
Two o'clock coordinate reads pressure and water injection rate a little respectively, obtains the analytic expression of these straightways:
P=kQ+P0
Wherein in formula: P is water injection pressure, MPa；K is the slope of fitting a straight line；Q is water injection rate, m3/d；
P0For the intercept of fitting a straight line, MPa；
3) cracking pressure auto-controller, into parameter setting mode, in the analytic expression that each section of pressure limit is applicable in
Slope k, intercept P0And control parameter is used as in the pressure limit input pressure auto-controller being fitted, and input a day injection allocation
Measure Qd；
4) start the automatic operation mode of pressure auto-controller, pressure auto-controller can automatically control throttle valve
Aperture stablizes water injection pressure in day with fluence QdNear corresponding pressure spot, and show current pressure and current estimated flow；
5) injection flow periodically is verified with ultrasonic flowmeter, when deviation is more than that control accuracy requires, repeated above-mentioned
Step 1-4.
In a kind of above-mentioned water injection rate autocontrol method, the water injection indication curve in the step 1) is that staff is preparatory
Using the pressure auto-controller in the ultrasonic flowmeter of external application, device or the site pressure table of external application in water filling safe pressure
At least 5 points measurement water flows are taken to obtain in range.
In a kind of above-mentioned water injection rate autocontrol method, the preferred turning point coordinate of two o'clock coordinate of selection in the step 2)
Match fluence point coordinate with day；In some coordinates and intercept chosen, the preferred turning point coordinate of some coordinates or day are with fluence point seat
Mark.
In a kind of above-mentioned water injection rate autocontrol method, the pressure auto-controller can input, store at least 4 sections directly
The parameter of line segment and day match fluence Qd。
In a kind of above-mentioned water injection rate autocontrol method, in the automatic operation mode of step 4) the pressure auto-controller
In, pressure auto-controller matches fluence Q according to the day of settingdCorrectly fitting pressure limit straightway is chosen to press to control water filling
Power, to control injection flow；If valve wide open is all unable to reach QdWhen corresponding pressure, then take obtainable current maximum
Pressure water flooding, and current water flow is estimated, shown by the corresponding straightway of the pressure.
It can be seen via above technical scheme that compared with prior art, the utility model, which discloses, provides a kind of water injection rate
Automatic control device and method, by using specific method pre-set the pressure auto-controller of every control parameter with
And the mechanisms such as other corresponding throttle valve, electric operator, needle valves, water filling pressure is automatically controlled with fluence according to the day of setting
Power greatly reduces the production, use and maintenance cost of water-injection control device to be precisely controlled injection flow, extends
Its service life, while being also convenient for the Comparison calibration of injection flow, particularly suitable in distributing room for water injection to control water injection rate.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 attached drawing is that a kind of one of embodiment of water injection rate automatic control device provided by the utility model installs knot
The schematic diagram of structure；
Fig. 2 attached drawing is that a kind of another embodiment of water injection rate automatic control device provided by the utility model installs knot
The schematic diagram of structure；
Fig. 3 attached drawing is a kind of flow chart of water injection rate autocontrol method provided by the utility model；
Fig. 4 attached drawing is the method schematic diagram provided by the utility model for obtaining water injection indication curve fitting a straight line analytic expression；
Wherein, in figure,
1- straight pipe；2- throttle valve；3- electric operator；4- pressure auto-controller；5- pressure transmitter；6- needle-like
Valve.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1:
The present embodiment is preferred technical solution, as shown in Figure 1, present embodiment discloses one kind to be mountable to distributing room for water injection note
Water injection rate automatic control device in water lines, the device are controlled automatically by straight pipe 1, throttle valve 2, electric operator 3, pressure
Instrument 4 processed, needle valve 6, pressure transmitter 5 are constituted, wherein
Straight pipe 1 and throttle valve 2 concatenate in water injecting pipeline, and straight pipe 1 is the water filling input terminal of device, outside straight pipe 1
Probe of ultrasonic flowmeter is mounted with, for measuring water injection indication curve and periodic calibration flowmeter；
In order to advanced optimize the technical solution of the present embodiment, the preferred smooth in appearance of above-mentioned straight pipe 1, uniform wall thickness is not
Become rusty steel making, and its length should be 10 times of its nominal bore or more, can both make outer diameter, the wall thickness dimension essence of straight pipe 1 in this way
Really it is found that measuring flow can also be carried out convenient for subsequent installation probe of ultrasonic flowmeter with stationary flow.Further, above-mentioned
(patent No.: 201510520653.7), or other existing high pressure resistant, long-lives can also be used in the preferred emery wheel valve of throttle valve 2
Throttle valve 2, be used for stable regulation water flow size, adjust water injection pressure.
Electric operator 3 is fixed on throttle valve 2 by terminal pad, specially the output shaft of electric operator 3 with
The stem sleeve of throttle valve 2 connects, and electric operator 3 should be able to reliably be coupled with throttle valve 2 and energy fast-acting modulator valve bar, preferably
It is opened from valve wide open to the contract fully time and is no more than 1-2 minutes using control throttle valve 2, and be equipped with the electronic of extreme position switch
Executing agency 3.Electric operator 3 is connect by cable with pressure auto-controller 4, is receiving pressure auto-controller 4 just
The reversed aperture for adjusting aperture and feedback throttle valve 2.
Needle valve 6 is external on water injecting pipeline, and pressure transmitter 5 is installed on the output end of 6 valve body of needle valve.Needle valve 6
For general purpose instrument installation needle valve, what is played is the purpose for facilitating pressure transmitter 5 demolition, installation safety.Pressure transmitter 5 passes through
Signal wire is connect with pressure auto-controller 4, to transmit water injection pressure signal.Further, pressure transmitter 5 must be
Range meet water injection pressure measurement range and can by water injection pressure pick-up be 4-20mA (or meet pressure auto-controller 4 define
DC voltage) signal UP transmitter.
Pressure auto-controller 4 includes control and testing board, display panel, key and input/output port, can be used for storing note
Water indicative curve and the day matched fluence parameter, and press setting match fluence and automatically control water injection pressure.In the present embodiment specifically:
For showing human-computer interaction interface, including parameter setting window and measurement window, parameter setting window should can be set display panel
The day set the slope, intercept parameter and suitable pressure limit of at least 4 fitting a straight line sections, and well can be set matches fluence, and
Measurement window can at least show current water pressure, instantaneous flow；Key is for selecting or inputting parameter；Input/output port includes
Power supply and pressure signal sample port, pressure signal sample port is for (can also be defeated the 4-20mA that pressure transmitter 5 generates
DC voltage out) signal, digital pressure signal is converted to by the microcomputer reads on control and testing board.
Embodiment 2:
As shown in Fig. 2, the structure of the present embodiment is substantially the same with embodiment 1, the difference lies in that one disclosed in the present embodiment
The entrance of throttle valve 2 is set as the water filling input terminal of device by kind water injection rate automatic control device, and straight pipe 1 is set as to the note of device
Water output end, staff according to the convenient situation of connection at scene can preferably use the connection type in embodiment 1 and with implementation
Connection type in example 2 is alternately.
The considerations of in terms of cost, it is preferable to use pressure transmitters 5 in embodiment 1 and embodiment 2, but also can choose
Use intelligent manometer, it is only necessary to which the output pressure signal of intelligent manometer is matched with the input of pressure auto-controller 4.
The utility model additionally provides one kind on the basis of a kind of water injection rate automatic control device disclosed above
The easy water injection rate autocontrol method of relative ease, the foundation of this method are as follows: the reflection of water injection well water injection indication curve is each single
Fill the water the relation curve of the injection pressure P and injection rate Q of layer or entire water injection well.Water injection indication curve is in entire the injecting process
Understand some variations, but other than the initial fill of new well several days change greatly, can enter stablize the flood period later, normal condition
Under be straight line or two to three sections of broken lines, the size of the slope reaction stratum injectivity index of every section of straight line, the variation of slope
It indicating injectivity index variation or water nozzle blocking, and excludes outside water filling accident, curvilinear motion is an extremely slow process, therefore,
Short-term curve stabilization is the foundation that the utility model method controls water injection rate using this curve.And a normal well is typical
Water injection well water injection indication curve as shown in Fig. 4 middle line 1 or line 2, that is, have form of straight lines or broken line form, broken line generally will not
More than 3 sections.
Embodiment 3:
As shown in figure 3, present embodiment discloses a kind of water injection rate autocontrol methods of water injection well, comprising the following steps:
Step 1 obtains the water injection indication curve of water injection well, i.e. P-Q curve by measurement；
Specifically: additionally mounted probe of ultrasonic flowmeter monitors water flow, pressure on the straight pipe 1 of the utility model
Test is using the pressure auto-controller 4 for meeting accuracy requirement or site pressure table in calibrating validity period.Pressure is automatic
Controller 4 is arranged in manual mode, in 15m3To (Qd+10)m3Range substantially 5-8 test point of equidistantly distributed, by manual
Adjusting 2 valve opening of throttle valve makes ultrasonic flowmeter show value close to the calculating flow value of each point, stay in pressure respectively and stablize
In ± 0.1MPa range, corresponding water injection pressure and corresponding flow value are read and record, until each point is completed.With seat
Water injection indication curve is drawn out on millimeter paper, puts on pound sign or sparge pipe number when necessary.
Step 2, the acquirement of fitting a straight line analytic expression and the reading for point pressure of transferring.
Below with reference to being explained for an important line segment to the acquirement of each parameter in P-Q analytic expression in curve 2 in Fig. 4,
In, abscissa represents daily water-injection rate (m3/ d), ordinate represents injection pressure (MPa).
Assuming that certain water injection well water injection indication curve is broken line as shown in Fig. 2, match fluence QdFor 60m3/ d, in indicative curve
Daily water-injection rate is 60m in figure3A point is met at as vertical line to curve 2 at abscissa, is crossed A point to axis of ordinates and is made vertical line, intersection point B,
Registration is 22MPa, after A point by this section of broken line reverse extending, hands over axis of ordinates in P0, registration is 0.5MPa. in figure
The slope k of line segment is equal to extended line AP where A point0Slope, size are as follows:
So the analytic expression of the control line of the well pressure is:
P=0.358Q+0.5
I.e. the straightway flow indication analytic expression is:
Q=(P-0.5)/0.358
This section of broken line turnover point pressure is P1=20.1MPa, therefore pressure range is that 20.1MPa-35MPa (can be pressed by water filling
Power allows upper limit value), which is to fill the water crucial line segment.
Similarly for other sections of broken line shown in attached drawing 2, after completing straight line fitting, any point coordinate on straightway can use
(preferably turning point) adds intercept, when intercept exceeds drawing, can also use two o'clock coordinate, obtain the analytic expression of remaining section, and
The pressure P of turning point is read in fig 21And another turnover point pressure or starting pressure or maximum allowble pressure point P2Or conduct
Analytic expression is suitble to section separation.
Step 3, cracking pressure auto-controller 4, into parameter setting mode, the parsing that each section of pressure limit is applicable in
Slope k, intercept P in formula0And control parameter is used as in the pressure limit input pressure auto-controller 4 of fitting, and input
The day of the well matches fluence Qd；
Step 4, starts the automatic operation mode of pressure auto-controller 4, and pressure auto-controller 4 can automatically control section
2 valve opening of valve is flowed, stablizes water injection pressure in day with fluence QdNear corresponding pressure spot, and show current pressure and current
Estimated flow, can compare display flow at this time and ultrasonic flowmeter shows flow, and deviation should be within the allowable range.
Step 5 continuously when normal water filling, periodically with ultrasonic flowmeter monitoring injection flow display deviation, works as deviation
When requiring more than control accuracy, step 1 is repeated to step 4.When filling pipe transformation occurs, seperated layer water injection distribution changes,
When shaft bottom acidification, pressure break or stratum injectivity index are mutated, it is primary should temporarily to assault monitoring.
Embodiment 4:
A kind of use manual testing's means acquisition water injection indication curve is provided in embodiment 3, to realize certainly to water injection rate
The method of dynamic control is present embodiments provided a kind of means tested automatically using special instrument and is finally reached control and infused
The method of water pressure and water injection rate, specifically:
Pressure auto-controller 4 is expanded into the integrated monitor with pressure, flow collection function, the monitoring
Valve opening can be divided into 5-8 equal portions point by instrument, tested the water injection pressure of respective point respectively and flow value and be stored in non-volatile
In memory, pressure auto-controller 4 at work, can check in two neighbouring sample points according to the flow value calculated by day injection allocation amount
Coordinate (p1, q1), (p2, q2), linear interpolation acquires water injection pressure P, and controls water injection pressure with this.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (9)
1. a kind of water injection rate automatic control device, the device are installed on water injecting pipeline, which is characterized in that by straight pipe, throttling
Valve, electric operator, pressure auto-controller, needle valve, pressure transmitter or intelligent manometer are constituted, the straight pipe and
Throttle valve concatenates in the water injecting pipeline, and the needle valve is external on the water injecting pipeline, the pressure transmitter or intelligence
Energy pressure gauge is installed on the output end of the needle-like valve body, and the electric operator is fixed on the throttling by terminal pad
On valve, the output shaft of electric operator is connect with the stem sleeve of the throttle valve, and the pressure auto-controller passes through electricity
Cable is connected with the electric operator, and the pressure transmitter or intelligent manometer are automatic by signal wire and the pressure
Controller is connected, and probe of ultrasonic flowmeter is equipped with outside the straight pipe.
2. a kind of water injection rate automatic control device according to claim 1, it is characterised in that: the length of the straight pipe is
10 times or more of its nominal bore.
3. a kind of water injection rate automatic control device according to claim 1 or 2, it is characterised in that: the material of the straight pipe
Expect preferred stainless steel.
4. a kind of water injection rate automatic control device according to claim 1, it is characterised in that: the preferred emery wheel of throttle valve
Valve.
5. a kind of water injection rate automatic control device according to claim 1, it is characterised in that: in the electric operator
It is switched equipped with extreme position.
6. a kind of water injection rate automatic control device according to claim 1, it is characterised in that: the pressure auto-controller
Including control and testing board, display panel, key and input/output port, wherein the display panel includes parameter setting window and surveys
Window is measured, for showing human-computer interaction interface；The key is for selecting or inputting parameter；The input/output port includes supplying
Electricity and pressure signal sample port, the pressure signal sample port is for being converted to the output signal of the pressure transmitter
Digital pressure signal, by the microcomputer reads on the control and testing board.
7. a kind of water injection rate automatic control device according to claim 1, it is characterised in that: the needle valve is general instrument
Needle valve is used in table installation.
8. a kind of water injection rate automatic control device according to claim 1, it is characterised in that: the straight pipe preferably fills
The water filling input terminal set.
9. a kind of water injection rate automatic control device according to claim 1, it is characterised in that: the entrance of the throttle valve is
The water filling input terminal of device, the straight pipe are the water filling output end of device.
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| CN201821482103.6U CN208763634U (en) | 2018-09-11 | 2018-09-11 | A kind of water injection rate automatic control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821482103.6U CN208763634U (en) | 2018-09-11 | 2018-09-11 | A kind of water injection rate automatic control device |
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| CN208763634U true CN208763634U (en) | 2019-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825186A (en) * | 2018-09-11 | 2018-11-16 | 荆州市明德科技有限公司 | A kind of water injection rate automatic control device and method |
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2018
- 2018-09-11 CN CN201821482103.6U patent/CN208763634U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825186A (en) * | 2018-09-11 | 2018-11-16 | 荆州市明德科技有限公司 | A kind of water injection rate automatic control device and method |
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