CN207377547U - A kind of device using flow waves regulation and control seperated layer water injection - Google Patents
A kind of device using flow waves regulation and control seperated layer water injection Download PDFInfo
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- CN207377547U CN207377547U CN201721182143.4U CN201721182143U CN207377547U CN 207377547 U CN207377547 U CN 207377547U CN 201721182143 U CN201721182143 U CN 201721182143U CN 207377547 U CN207377547 U CN 207377547U
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Abstract
The utility model belongs to oil field development technical field, and in particular to a kind of device for regulating and controlling layering water distribution using flow waves.The utility model regulates and controls the device of seperated layer water injection using flow waves, including ground installation and downhole hardware；Ground installation transmits flow waves signal to downhole hardware, and downhole hardware controls water injection rate by monitoring flow waves signal, parsing flow waves signal.The utility model is communicated using flow waves mode, and for ground installation without pressure relief device, whole process does not have liquid discharge, safety and environmental protection, and easy to operate, reliable communications in communication process.
Description
Technical field
The utility model belongs to oil field development technical field, and in particular to a kind of dress for regulating and controlling layering water distribution using flow waves
It puts.
Background technology
After the input exploitation of oil field, with the growth of mining time, formation pressure constantly declines, and underground crude oil largely deaerates,
Viscosity increases, and oil well output greatly reduces or even meeting stop-spraying stops production, and underground is caused, which to remain a large amount of dead oils, to exploit.In order to more
It mends oil extraction and goes out rear caused underground deficit, keep and improve formation pressure, realize oil field stable high yield, and acquisition is higher
Recovery ratio, it is necessary to water filling is carried out to oil reservoir, water is injected oil reservoir using water injection well, supplement and keeps formation pressure, reaches drive
The purpose of oil.
Tripping in water injection string is needed in water injection well, which is made of water injection pipe, packer and injection well downhole flow regulator, between each oil reservoir
It is separated by packer, injection well downhole flow regulator is mounted on the water injection pipe between packer, and water filling switch and water nozzle are housed on injection well downhole flow regulator.
Mainly using cable-free type intelligent watering device, ground installation uses the injection well downhole flow regulator of current hierarchical water filling with downhole hardware
Communication mode mainly have：Decentralization communication pipe nipple communication or pressure wave communication, decentralization communication pipe nipple communication mode is because of its later stage
Maintenance cost is larger, gradually by pressure wave communication in place.
Pressure wave communication is to regulate and control each interval injection well downhole flow regulator discharge area in underground in ground pressure wave, is matched somebody with somebody so as to fulfill layering
Water.
Pressure wave communication has the drawback that：
1) communication mode is needed to use and let out in order to which pressure wave is made to be easy to downhole hardware monitoring, when ground installation generates low pressure
Pressure valve mode, opening relief valve pressure reduction have liquid discharge and pollute the environment, and high pressure relief is also dangerous.If ground
Face device does not fill relief valve, and entirely by downhole hardware pressure release, then pressure wave response speed is slow, and communication efficiency and success rate are low.
2) for the hole condition that permeability is low, water imbibition is bad, downhole hardware opens or closes water filling switch, ground water injection pipe
Line pressure changes unobvious, and ground installation can not monitor the variation of pressure, the pressure wave that can not parse underground return, can cause
Underground earthward direction communication failure.
The content of the invention
To solve above-mentioned problems of the prior art, flow waves regulation and control layering note is utilized the utility model proposes a kind of
The device of water, the ground installation of the device send flow waves signal, and underground equipment parsing flow waves signal controls the water filling of underground
The aperture of switch realizes the purpose of layering water distribution, which need not install relief valve, not only saves cost, but also beneficial to environmental protection.
The technical solution that the utility model solves the above problems is：A kind of device using flow waves regulation and control seperated layer water injection,
It is characterized in that, including ground installation and downhole hardware；Ground installation transmits flow waves signal, underground dress to downhole hardware
It puts by monitoring flow waves signal, parsing flow waves signal to control water injection rate；
The ground installation includes the first encoder, the first circuit system and ground water filling switch；First circuit system bag
Receiver, decoder and control circuit are included, first encoder encodes the order for being sent to downhole hardware, the first circuit
System switchs to form flow waves signal according to the water filling of coding-control ground；
The downhole hardware includes underground water-injection switch, electric circuit in well system, electric power system and motor；Electric circuit in well system
Including receiver, decoder and control circuit.The electric circuit in well system monitoring simultaneously parses the flow waves letter that ground installation is sent
Number, the aperture then switched by motor control underground water-injection, electric power system provides power supply for downhole hardware.
Further, above-mentioned downhole hardware further include second encoder, second circuit system, flow monitoring unit, in pipe
Pressure monitoring unit and formation pressure monitoring unit；Second encoder is by flow monitoring unit, overpressure monitoring unit and ground
The data of stressor layer monitoring unit monitoring are encoded, and second circuit system is earthward filled according to coding-control underground water-injection switch
Put transmitted traffic ripple signal；First circuit system also collects and parses the flow waves signal that downhole hardware is sent.
Further, above-mentioned flow waves signal is the various waveform combinations being made of two variables of flow and time.
Further, the coding of above-mentioned first encoder includes floor position number and data command.
Further, the coding rule of above-mentioned first encoder is the saltus step time that flow is controlled in specific time interval
Number, different according to transition times transfer different instruction.
Further, above-mentioned second encoder is advised by the use of the duration after the transition times of flow and saltus step as coding
Then.
Further, above-mentioned second encoder coding takes start bit, data segment, stop bits combined.
Further, above-mentioned data segment includes multidigit, and each data of data segment are by high state flow in the set time
The position of interior appearance determines.
The advantages of the utility model：
1st, the utility model is communicated using flow waves mode, can solve very well ground layer absorbent it is bad when pressure change it is unknown
Aobvious, pressure is not easy the problem detected, highly practical.
2nd, the utility model is communicated using flow waves mode, and ground installation is without pressure relief device, entire mistake in communication process
Journey does not have liquid discharge, safety and environmental protection.
3rd, the utility model is communicated using flow waves mode, and flow waves flow waves variation compared with pressure wave becomes apparent,
The sensor of equal accuracy is more easily detected the variation of flow waves, and communication efficiency is high.
4th, the utility model construction is simple reduces construction risk, improves construction efficiency, reduces operating personnel, drop
Low cost.
5th, the utility model is easy to operate, reliable communications.
Description of the drawings
Fig. 1 is that the utility model ground installation is connected system schematic with downhole hardware；
Fig. 2 is the utility model downhole hardware scheme of installation；
Fig. 3 is the oscillogram of the utility model flow waves signal；
Fig. 4 is the utility model the first encoder encoding examples figure；
Fig. 5 is the utility model second encoder encoding examples figure.
Wherein：1- ground installations；The first encoders of 101-；The first circuit systems of 102-；103- ground water filling switch；2- wells
Lower device；201- underground water-injections switch；202- electric circuit in well systems；203- electric power systems；204- second encoders；205- second
Circuit system；206- flow monitoring units；207- overpressure monitoring unit；208- formation pressure monitoring units；209- motors；
3- water injection strings；4- packers；The 5- boreholes wall；6- water injection wells.
Specific embodiment
The embodiment provided below in conjunction with the accompanying drawings is described in detail the utility model：
Only for convenience, in the following description, specific direction term has been used, such as " on ", " under ",
"left", "right" etc. is using corresponding attached drawing as reference, the limitation to the utility model can not be considered, when drawing
When definition direction changes, the direction that these words represent should be construed to corresponding different directions.
Referring to Fig. 1 and Fig. 2, a kind of device using flow waves regulation and control seperated layer water injection, including ground installation 1 and downhole hardware
2。
Ground installation 1 includes the first encoder 101, the first circuit system 102 and ground water filling switch 103, the first circuit
System 102 includes receiver, decoder and control circuit；First encoder 101 compiles the order for being sent to downhole hardware 2
Code, the first circuit system 102 form flow waves signal according to coding-control ground water filling switch 103；First circuit system 102 is also
It collects and parses downhole hardware 2 and send flow waves signal.
Downhole hardware 2 includes underground water-injection switch 201, electric circuit in well system 202, electric power system 203, second encoder
204th, second circuit system 205, flow monitoring unit 206, overpressure monitoring unit 207,208 and of formation pressure monitoring unit
Motor 209.Electric power system 203 provides power supply for downhole hardware 2.Electric circuit in well system 202 includes receiver, decoder and control
Circuit.
The basic principle of the utility model is as follows：
Using incompressible liquid the flow conservation during inflow and outflow tubing string the characteristics of, passed using flow waves mode
The defeated detection for being more conducive to signal.
According to the opening of hydrodynamics incompressible fluid is equation, for working condition, only there are one entrance and one
For the well of a outlet, flow into as the liquid of oil pipe with the mass flow of the liquid of outflow oil pipe is, as formula 1 is shown：
Q=q1=q2Formula 1
Q --- injection flow；
q1--- flow at the well head of ground；
q2--- underground water-injection flow；
It can be seen that flow has free of losses characteristic according to formula 1, be easy to detect.
The relational expression changed under well head pressure variation to down-hole pressure can be drawn according to Bernoulli equation：
p′1=p '2+h′f1(q)+h′f2(q,l)+h′f3Formula 2
Wherein：p′1--- well head pressure changes；
p′2--- down-hole pressure changes；
h′f1--- local resistance loss；
h′f2--- friction loss；
h′f3--- unknown losses；
L --- tubing length；
It can be seen that pressure has linear loss according to formula 2, if pressure change is small at well head, change unobvious to underground, no
It is easy to detect.
The utility model using flow waves regulation and control layered water filler operation principle be：First coding of ground installation 1
Device 101 encodes the order for being sent to downhole hardware 2, and the first circuit system 102 switchs 103 according to the water filling of coding-control ground
Form flow waves signal；Downhole hardware 2 by electric circuit in well system 202 monitors and parses the flow waves letter that ground installation 1 is sent
Number, motor 209 is then controlled to adjust the aperture of underground water-injection switch 201, realizes control water injection rate.
Second encoder 204 is by flow monitoring unit 206, overpressure monitoring unit 207 and formation pressure monitoring unit
The data of 208 monitorings are encoded, and second circuit system 205 according to coding-control underground water-injection switch 201, earthward send out by device 1
Flow waves signal is sent, the first circuit system 102, which collects and parses downhole hardware 2, sends flow waves signal, finally to staff
Show flow value, overpressure value and value formation pressure.
Referring to Fig. 3, flow waves signal is that formed wave sequence is changed over time by flow.Flow waves are to pass through increasing
Greatly, reduce water filling switch aperture to generate.It is height to increase the corresponding flow waves of water filling switch aperture flow rise, reduces water filling and opens
It is low to spend flow to reduce corresponding flow waves.
Flow wave communication is to increase or reduce water filling switch aperture generation flow waves on the basis of present flow rate to realize,
So improve communication efficiency.It is switched during communication without fully closed or standard-sized sheet water filling, effectively extends the use of water filling switch
Service life, the overall power for reducing instrument.
The coding of first encoder includes floor position number and data command.Referring to Fig. 4, the 1st order shows 4 saltus steps, represents
Operate the 1st layer of injection well downhole flow regulator；2nd order shows 6 saltus steps, represents to read the pipe external pressure force value of this layer of injection well downhole flow regulator.First encoder
Coding rule be the transition times that flow is controlled in specific time interval, different fingers are transferred according to the difference of transition times
Order.
Second encoder is by the use of the duration after the transition times of flow waves and flow waves saltus step as coding rule.The
Two encoders coding takes start bit, data segment, stop bits combined, wherein, data segment include multidigit, data segment each
Data are determined by flow waves for the position that high state occurs within the set time.Each data has 10 coding time intervals
N (being respectively 0,1,2,3,4,5,6,7,8,9), if a certain interval becomes high, the order at this interval represents this number
Value.Referring to Fig. 5, the 5th of the 1st bit traffic data represents at intervals of high represent the 4, the 2nd bit traffic data the 7th at intervals of height
6.Therefore, the flow value that downhole hardware earthward transmits is 46 sides/day.
The data of communication are encoded using the height and its temporal characteristics of waveform, the shape that the data of coding pass through flow waves
Formula realizes transmission, so as to complete the communication of ground installation and downhole hardware.
The transmitted in both directions of data can realize the communication of ground installation and downhole hardware.Operation underground dress can be transmitted in ground installation
The order put, downhole hardware can be according to required data pressures of order passback ground installation, flow, temperature received etc..
The method that a kind of device using flow waves regulation and control seperated layer water injection of the utility model carries out control hierarchy water filling：
1) ground installation 1 is mounted on well head, by the underground water-injection switch 201, motor 209, electric power system of downhole hardware 2
203rd, electric circuit in well system 202, second encoder 204, flow monitoring unit 206, overpressure monitoring unit 207 and ground lamination
Power monitoring unit 208 is arranged on water injection string 3, and is located at corresponding water filling layer, and packing is installed between each water filling layer
Device 4 is separated；
2) order for being sent to downhole hardware 2 is encoded using the first encoder 101 of ground installation 1, coding is completed
The first circuit system 102 switchs 103 according to the water filling of coding-control ground afterwards, generates corresponding flow waves, each water filling layer underground dress
2 detection in real time of second circuit system 205, parsing flow waves are put, if the floor position number parsed and the floor of certain layer of downhole hardware 2
Position number is identical, and the second circuit system 205 of this layer of downhole hardware 2 is carried out the order, controls the big of underground water-injection switch 201
It is small, and then control corresponding water injection rate of interval；
3) data for needing to transmit are encoded using the second encoder 204 of downhole hardware 2, by the way that underground is controlled to note
Taps 201 realizes that the height of flow changes to form corresponding discharge ripple, and the first inspection in real time of circuit system 102 of ground installation 1
It surveys and parses flow waves, it is final to obtain required data.
3) second encoder 204 is by flow monitoring unit 206, overpressure monitoring unit 207 and formation pressure monitoring in
Flow, overpressure and the formation pressure data that unit 208 monitors are encoded, and the first circuit system 102 of ground installation 1 is real
When detect and parse flow waves, finally obtain sandface flow rate, overpressure and formation pressure data.
Claims (2)
1. a kind of device using flow waves regulation and control seperated layer water injection, it is characterised in that：
Including ground installation (1) and downhole hardware (2)；Ground installation (1) is to downhole hardware (2) transmitted traffic ripple signal, underground
Device (2) controls water injection rate by monitoring flow waves signal, parsing flow waves signal；
The ground installation (1) includes the first encoder (101), the first circuit system (102) and ground water filling switch (103)；
First encoder (101) encodes the order for being sent to downhole hardware (2), and the first circuit system (102) is according to coding
Ground water filling switch (103) is controlled to form flow waves signal；
The downhole hardware (2) includes underground water-injection switch (201), electric circuit in well system (202), electric power system (203) and electricity
Machine (209)；The electric circuit in well system (202) monitors and parses the flow waves signal that ground installation (1) is sent, and then passes through electricity
The aperture of machine (209) control underground water-injection switch (201), electric power system (203) provide power supply for downhole hardware (2).
2. a kind of device using flow waves regulation and control seperated layer water injection according to claim 1, it is characterised in that：The underground
Device (2) further includes second encoder (204), second circuit system (205), flow monitoring unit (206), overpressure monitoring
Unit (207) and formation pressure monitoring unit (208)；
Second encoder (204) is by flow monitoring unit (206), overpressure monitoring unit (207) and formation pressure monitoring list
The data of first (208) monitoring are encoded, and second circuit system (205) switchs (201) to ground according to coding-control underground water-injection
Face device (1) transmitted traffic ripple signal；
First circuit system (102) also collects and parses the flow waves signal that downhole hardware (2) is sent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721182143.4U CN207377547U (en) | 2017-09-08 | 2017-09-08 | A kind of device using flow waves regulation and control seperated layer water injection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721182143.4U CN207377547U (en) | 2017-09-08 | 2017-09-08 | A kind of device using flow waves regulation and control seperated layer water injection |
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| CN207377547U true CN207377547U (en) | 2018-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503720A (en) * | 2017-09-08 | 2017-12-22 | 西安思坦仪器股份有限公司 | A kind of device and method for regulating and controlling seperated layer water injection using flow waves |
| CN112211603A (en) * | 2019-07-12 | 2021-01-12 | 中国石油天然气股份有限公司 | Stratified water injection system and control method thereof |
-
2017
- 2017-09-08 CN CN201721182143.4U patent/CN207377547U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503720A (en) * | 2017-09-08 | 2017-12-22 | 西安思坦仪器股份有限公司 | A kind of device and method for regulating and controlling seperated layer water injection using flow waves |
| CN112211603A (en) * | 2019-07-12 | 2021-01-12 | 中国石油天然气股份有限公司 | Stratified water injection system and control method thereof |
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