CN107503720A - A kind of device and method for regulating and controlling seperated layer water injection using flow waves - Google Patents
A kind of device and method for regulating and controlling seperated layer water injection using flow waves Download PDFInfo
- Publication number
- CN107503720A CN107503720A CN201710807149.4A CN201710807149A CN107503720A CN 107503720 A CN107503720 A CN 107503720A CN 201710807149 A CN201710807149 A CN 201710807149A CN 107503720 A CN107503720 A CN 107503720A
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- Prior art keywords
- flow
- water injection
- flow waves
- encoder
- downhole hardware
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
The invention belongs to oil field development technical field, and in particular to a kind of device and method for regulating and controlling layering water distribution using flow waves.The present invention regulates and controls the device of seperated layer water injection, including ground installation and downhole hardware using flow waves；Ground installation transmits flow waves signal to downhole hardware, and downhole hardware is by monitoring flow waves signal, parsing flow waves signal to control water injection rate.The present invention 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 simple to operate, reliable communications in communication process.
Description
Technical field
The invention belongs to oil field development technical field, and in particular to it is a kind of using flow waves regulate and control layering water distribution device and
Method.
Background technology
After the input exploitation of oil field, with the growth of recovery time, formation pressure constantly declines, and underground crude oil largely deaerates,
Viscosity increase, oil well output greatly reduce, or even meeting stop-spraying stops production, and causing underground to remain a large amount of dead oils can not exploit.In order to more
Mend oil extraction and go out rear caused underground deficit, keep and improve formation pressure, realize oil field stable high yield, and obtain 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, the tubing string is made up of water injection pipe, packer and injection well downhole flow regulator, between each oil reservoir
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.
The injection well downhole flow regulator of current hierarchical water filling mainly uses cable-free type intelligent watering device, and its ground installation uses 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, so as to realize that layering is matched somebody with somebody
Water.
Pressure wave communication has the drawback that：
1) communication mode is in order that pressure wave is easy to downhole hardware monitoring, and needs are used and let out when ground installation produces low pressure
Pressure valve mode, opening relief valve pressure reduction have liquid discharge and environment are polluted, and high pressure relief is also dangerous.If ground
Face device does not fill relief valve, leans on downhole hardware pressure release entirely, 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 change of pressure, can not parse the pressure wave of underground return, can cause
Underground earthward direction communication failure.
The content of the invention
To solve above-mentioned problems of the prior art, present invention proposition is a kind of to regulate and control seperated layer water injection using flow waves
Device, the ground installation of the device send flow waves signal, underground equipment parsing flow waves signal, control the water filling of underground to switch
Aperture, realize the purpose of layering water distribution, the device need not install relief valve, both save cost, be beneficial to environmental protection again.
The present invention also proposes a kind of side for the device progress seperated layer water injection control for regulating and controlling seperated layer water injection using above-mentioned flow waves
Method, this method realize the transmitted in both directions of ground installation and downhole hardware data with flow waves, and communication process need not discharge liquid, peace
Loopful is protected, and communication process is not influenceed by ground layer absorbent, and data transfer is reliable and stable.
Technical proposal that the invention solves the above-mentioned problems is：A kind of device for regulating and controlling seperated layer water injection using flow waves, it is special
Different part is, including ground installation and downhole hardware；Ground installation transmits flow waves signal to downhole hardware, and downhole hardware leads to
Cross monitoring flow waves signal, parse 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 to 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 is also including in second encoder, second circuit system, flow monitoring unit, 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 earthward fills 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 up 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 transmit 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.
Meanwhile it is controlled point using the above-mentioned device for regulating and controlling seperated layer water injection using flow waves present invention also offers a kind of
The method of layer water filling, it is characterized in that,
1) ground installation is arranged on well head, by the water filling switch of downhole hardware, motor, electric power system, electric circuit in well system
System, second encoder, flow monitoring unit, overpressure monitoring unit and formation pressure monitoring unit are arranged on water injection string
On, and corresponding water filling layer is located at, packer is installed between each water filling layer and separated；
2) order for being sent to downhole hardware is encoded using the first encoder of ground installation, first after the completion of coding
Circuit system switchs according to the water filling of coding-control ground, flow waves corresponding to generation, the second circuit of each water filling layer downhole hardware
System detects, parses flow waves in real time, if the floor position number parsed is identical with the floor position number of certain layer of downhole hardware, this layer of underground
The second circuit system of device is carried out the order, the size of control underground water-injection switch, and then controls corresponding water injection rate of interval；
3) data for needing to transmit are encoded using the second encoder of downhole hardware, by controlling underground water-injection to open
Pass realizes that the height of flow changes to form corresponding discharge ripple, and the first circuit system of ground installation is detected simultaneously resolution flow in real time
Ripple is measured, it is final to obtain required data.
Further, it is above-mentioned 3) in second encoder the data transmitted will be needed to be encoded, be by flow monitoring unit,
Overpressure monitoring unit and flow, overpressure and the formation pressure data of the monitoring of formation pressure monitoring unit are encoded；
And the first circuit system of ground installation is detected in real time and parse flow waves, it is final to obtain required data, including shaft bottom stream
Amount, overpressure and formation pressure data.
Advantages of the present invention：
1st, the present invention communicated using flow waves mode, can solve very well layer absorbent it is bad when pressure change unobvious,
Pressure is not easy the problem detected, practical.
2nd, the present invention is communicated using flow waves mode, and ground installation does not have without pressure relief device, whole process in communication process
There are liquid discharge, safety and environmental protection.
3rd, the present invention is communicated using flow waves mode, and flow waves flow waves change compared with pressure wave becomes apparent, on an equal basis
The sensor of precision is more easily detected the change of flow waves, and communication efficiency is high.
4th, construction is simple of the present invention, reduces construction risk, improves efficiency of construction, reduces operating personnel, reduces
Cost.
5th, simple to operate, reliable communications of the invention.
Brief description of the drawings
Fig. 1 is that ground installation of the present invention is connected system schematic with downhole hardware；
Fig. 2 is downhole hardware scheme of installation of the present invention；
Fig. 3 is the oscillogram of inventive flow ripple signal；
Fig. 4 is the first encoder encoding examples figure of the invention；
Fig. 5 is second encoder encoding examples figure of the present invention.
Wherein：1- ground installations；The encoders of 101- first；The circuit systems of 102- first；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.
Embodiment
The embodiment provided below in conjunction with the accompanying drawings is described in detail to the present invention：
Only for convenience, in the following description, specific direction term has been used, such as " on ", " under ",
"left", "right" etc., it is using corresponding accompanying drawing as reference, limitation of the present invention can not be considered, when the definition of drawing
When 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 for regulating and controlling seperated layer water injection using flow waves, 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 is compiled to 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
Collect and parse 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, the and of formation pressure monitoring unit 208
Motor 209.Electric power system 203 is that downhole hardware 2 provides power supply.Electric circuit in well system 202 includes receiver, decoder and control
Circuit.
The general principle of the present invention 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.
It can be seen from the opening of hydrodynamics incompressible fluid is equation, there was only an entrance and one for working condition
For the well of individual 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 change 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 present invention utilizes flow waves to regulate and control the operation principle of layered water filler：First encoder 101 of ground installation 1
The order for being sent to downhole hardware 2 is encoded, the first circuit system 102 is formed according to coding-control ground water filling switch 103
Flow waves signal；Downhole hardware 2 monitors and parsed the flow waves signal that ground installation 1 is sent by electric circuit in well system 202, so
Afterwards controlled motor 209 come adjust underground water-injection switch 201 aperture, realize 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 is collected 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 produce.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.Switched during communication without fully closed or standard-sized sheet water filling, effectively extend the use of water filling switch
Life-span, 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 transmitted according to the difference of transition times
Order.
Second encoder is used as coding rule by the use of the duration after the transition times of flow waves and flow waves saltus step.The
Two encoders coding takes start bit, data segment, stop bits combined, wherein, data segment includes multidigit, data segment each
Data are that the position that high state occurs within the set time determines by flow waves.Each data has 10 coding time intervals
N (being respectively 0,1,2,3,4,5,6,7,8,9), if a certain interval is changed into 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 characteristicses 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.The transmittable operation underground dress of ground installation
The order put, downhole hardware can be according to the data pressure required for the order passback ground installation received, flow, temperature etc..
The method that a kind of device using flow waves regulation and control seperated layer water injection of the present invention is controlled seperated layer water injection：
1) ground installation 1 is arranged 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, and flow waves corresponding to generation, each water filling layer underground fills
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 controlling underground to note
Taps 201 realizes that the height of flow changes to form corresponding discharge ripple, and the first circuit system 102 of ground installation 1 is examined in real time
Survey and parse 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 (10)
- A kind of 1. device for regulating and controlling seperated layer water injection using flow waves, 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) is by monitoring flow waves signal, parsing flow waves signal to control water injection rate；The ground installation (1) includes the first encoder (101), the first circuit system (102) and ground water filling switch (103)； First encoder (101) encodes to 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) are that downhole hardware (2) provides power supply.
- A kind of 2. device for regulating and controlling seperated layer water injection using flow waves according to claim 1, it is characterised in that：The underground Device (2) also 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.
- A kind of 3. device for regulating and controlling seperated layer water injection using flow waves according to claim 2, it is characterised in that：The flow Ripple signal is the various waveform combinations being made up of two variables of flow and time.
- A kind of 4. device for regulating and controlling seperated layer water injection using flow waves according to claim 3, it is characterised in that：Described first The coding of encoder (101) includes floor position number and data command.
- A kind of 5. device for regulating and controlling seperated layer water injection using flow waves according to claim 3 or 4, it is characterised in that：It is described The coding rule of first encoder (101) is the transition times that flow is controlled in specific time interval, according to transition times Difference transmits different instruction.
- A kind of 6. device for regulating and controlling seperated layer water injection using flow waves according to claim 5, it is characterised in that：Described second Encoder (204) is used as coding rule by the use of the duration after the transition times of flow and saltus step.
- A kind of 7. device for regulating and controlling seperated layer water injection using flow waves according to claim 6, it is characterised in that：Described second Encoder (204) coding takes start bit, data segment, stop bits combined.
- A kind of 8. device for regulating and controlling seperated layer water injection using flow waves according to claim 7, it is characterised in that：The data Section includes multidigit, and the position that each data of data segment are occurred by high state flow within the set time determines.
- 9. a kind of method that device using flow waves regulation and control seperated layer water injection is controlled seperated layer water injection, it is characterised in that：1) ground installation (1) is arranged on well head, by the underground water-injection switch (201), motor (209), power supply of downhole hardware (2) System (203), electric circuit in well system (202), second encoder (204), flow monitoring unit (206), overpressure monitoring are single First (207) and formation pressure monitoring unit (208) are arranged on water injection string (3), and are located at corresponding water filling layer, each Packer (4) is installed between water filling layer to be separated；2) order for being sent to downhole hardware (2) is encoded using the first encoder (101) of ground installation (1), encoded (103) are switched according to the water filling of coding-control ground into rear first circuit system (102), flow waves corresponding to generation, each water filling layer The detection in real time of the second circuit system (205) of downhole hardware (2), parsing flow waves, if the floor position number parsed and certain layer of well The floor position number of lower device (2) is identical, and the second circuit system (205) of this layer of downhole hardware (2) is carried out the order, controls underground The size of water filling switch (201), 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 controlling underground to note Taps (201) realizes that the height of flow changes to form corresponding discharge ripple, and the first circuit system (102) of ground installation (1) Detect in real time and parse flow waves, it is final to obtain required data.
- 10. a kind of device for regulating and controlling seperated layer water injection using flow waves according to claim 9 is controlled seperated layer water injection Method, it is characterised in that：It is described 3) in second encoder (204) by flow monitoring unit (206), overpressure monitoring unit (207) and formation pressure monitoring unit (208) monitoring flow, overpressure and formation pressure data encoded, ground dress The first circuit system (102) for putting (1) detects in real time and parses flow waves, finally obtains sandface flow rate, overpressure and stratum Pressure data.
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| CN201710807149.4A CN107503720A (en) | 2017-09-08 | 2017-09-08 | A kind of device and method for regulating and controlling seperated layer water injection using flow waves |
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| CN201710807149.4A CN107503720A (en) | 2017-09-08 | 2017-09-08 | A kind of device and method for regulating and controlling seperated layer water injection using flow waves |
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| CN110195578B (en) * | 2019-03-18 | 2023-05-12 | 中国石油化工股份有限公司 | Separate layer water injection system of small cased well |
| CN110111550A (en) * | 2019-04-17 | 2019-08-09 | 中国石油天然气股份有限公司 | A kind of water injection well fluid carrier signal control method and device |
| CN110593828A (en) * | 2019-06-24 | 2019-12-20 | 中国石油天然气股份有限公司 | Fluid pressure wave code experimental device and method |
| CN110593828B (en) * | 2019-06-24 | 2023-12-22 | 中国石油天然气股份有限公司 | Fluid pressure wave code experimental device and method |
| CN110501045A (en) * | 2019-07-25 | 2019-11-26 | 西安思坦仪器股份有限公司 | A kind of flow measurement device and method in variable cross section channel |
| CN113338881A (en) * | 2021-07-23 | 2021-09-03 | 西安洛科电子科技股份有限公司 | Wave code communication intelligent water distributor flow underground online calibration method |
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