CN109184641A - A kind of system and method that injection well injectability is improved based on bottom pressure telemetering - Google Patents
A kind of system and method that injection well injectability is improved based on bottom pressure telemetering Download PDFInfo
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- CN109184641A CN109184641A CN201811054875.4A CN201811054875A CN109184641A CN 109184641 A CN109184641 A CN 109184641A CN 201811054875 A CN201811054875 A CN 201811054875A CN 109184641 A CN109184641 A CN 109184641A
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- 238000002347 injection Methods 0.000 title claims abstract description 79
- 239000007924 injection Substances 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 50
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 210000001367 artery Anatomy 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 4
- 239000000243 solution Substances 0.000 abstract description 2
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
- 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
- E21B47/13—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 by electromagnetic energy, e.g. radio frequency
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
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- Electromagnetism (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to a kind of system and method for improving injection well injectability based on bottom pressure telemetering, it is characterised in that: it includes the downhole system being arranged at the implanted layer position of underground and the ground system being arranged in outside injection-gathering well head.Downhole system is periodically monitored the bottom pressure data of injection well, and sends wireless pulse signals to ground system according to bottom pressure data；Ground system is decoded received wireless pulse signals to obtain actual bottom pressure data, and is adjusted according to well head injection rate of the bottom pressure data to injection well.The real-time monitoring of injection well bottom pressure may be implemented in the present invention, in the case where bottom pressure situation can be grasped in real time, it can be under the premise of guaranteeing that bottom pressure is no more than formation fracture pressure, the well head injection rate for more reasonably adjusting polymer solution, to effectively improve the injectability of injection well.
Description
Technical field
The invention belongs to oil field developments to exploit field, improve injection well note based on bottom pressure telemetering more particularly to one kind
Enter the system and method for ability.
Background technique
Polymer flooding has been used widely in oil field development as a kind of important development scheme, and is achieved good
Effect.The injectability of injection well is rational proration injection allocation, the important indicator for ensureing polymer flooding effect, how to improve injection well
Injectability be important topic that researcher is paid close attention to all the time.Injectability is closely related with injection pressure, just
In normal injection process, it is desirable that bottom pressure is not above formation fracture pressure, to eliminate risk of the stratum by pressure break, therefore well
The monitoring of bottom pressure just becomes an important process.However, in practical mining site, due to the complexity of injection well shaft column,
Shaft bottom is difficult the conventional pressure manometers for keeping tripping in rely on cable transmission signal for a long time, and bottom pressure monitoring data are deficient, practical past
Injection rate is controlled toward according to the maximum wellhead pressure converted by formation fracture pressure along pit shaft.It controls by this method
The problem of injection process it is clear that injection well because well head pressure height due to cause injection rate that injection allocation is not achieved the case where when have hair
It is raw, and practical bottom pressure situation is unknown, due to being widely present of being lost along wellbore pressure and complexity, bottom pressure
The degree close to formation fracture pressure may be reached far away, may objectively result in the loss of injectability.Thus cause
Stratum energy cannot get timely and effective supplement, and polymer flooding effect also will certainly just be affected.
Summary of the invention
Injection well injectability is improved based on bottom pressure telemetering in view of the above-mentioned problems, the object of the present invention is to provide one kind
System and method, which can carry out real-time monitoring to practical bottom pressure, and according to actual pressure data to injection well
Injection rate is adjusted, and effectively improves the injectability of injection well.
To achieve the above object, the present invention takes following technical scheme: one kind improving injection well based on bottom pressure telemetering
The system of injectability, it is characterised in that: it includes the downhole system being arranged at the implanted layer position of underground and is arranged in injection well
Ground system outside well head.Downhole system is periodically monitored the bottom pressure data of injection well, and according to shaft bottom
Pressure data sends wireless pulse signals to ground system；Ground system is decoded to obtain reality to received wireless pulse signals
The bottom pressure data on border, and be adjusted according to well head injection rate of the bottom pressure data to injection well.
The downhole system includes underground central control system, pulse signal generator, pressure monitoring and controlling device and supplying cell；Institute
It states the instruction that pressure monitoring and controlling device is sent according to the underground central control system and periodical acquisition is carried out to bottom pressure data, and will
The bottom pressure data of acquisition are transmitted through the cable to the underground central control system；The underground central control system is according to receiving
Bottom pressure data encoding controls the pulse signal generator and issues one group of pressure pulse corresponding with bottom pressure data
Signal is to ground system, and the supplying cell is for powering to the downhole system.
The ground system includes ground central control system, pulsed signal device and monitoring interface, and the pulse signal connects
It receives device and receives the pressure pulse signal that the downhole system uploads, and be transmitted through the cable to the ground central control system, it is described
The pressure pulse signal received is reduced into bottom pressure data by ground central control system, and is shown in the monitoring interface.
The downhole system is integrated and connected on infusing poly- tubing string, at the implanted layer position of tubing string lower going-into-well bottom.
The well head that injection well to be monitored is arranged in the pulsed signal device is infused on poly- pipeline.
A method of injection well injectability is improved based on bottom pressure telemetering, it is characterised in that the following steps are included:
1) downhole system is installed: being filled underground central control system with pulse signal generator, pressure testing and controlling respectively by cable
It sets to connect with supplying cell and integrate, and connect on infusing poly- tubing string, at the implanted layer position of tubing string lower going-into-well bottom；
2) ground system is installed: the setting of pulsed signal device being infused on poly- pipeline in well head, and passes through cable and ground
Central control system connection, ground central control system are connect with monitoring interface；
3) monitoring time is preset then, downhole system is acquired bottom pressure, and generates and bottom pressure data phase
Corresponding wireless pulse signals are sent to ground system；
4) ground system is decoded the wireless pulse signals received, obtains the practical bottom pressure number of injection well
According to being adjusted according to the practical bottom pressure data to the well head injection rate of injection well；
5) acquisition of bottom pressure data, upload finish, and downhole system reenters dormant state；
6) next monitoring time then, circulating repetition step 3) -5), realize the real-time monitoring of the bottom pressure of injection well.
In the step 3), downhole system is acquired bottom pressure, and generates corresponding with bottom pressure data
The method that wireless pulse signals are sent to ground system, comprising the following steps:
3.1) preset monitoring time then, underground central control system by dormant state to working condition, transmission Monitoring instruction to
Pressure monitoring and controlling device；
3.2) pressure monitoring and controlling device Monitoring instruction based on the received, acquires the bottom pressure data of the implanted layer position, and lead to
It crosses cable and bottom pressure data is transferred to underground central control system；
3.3) after underground central control system receives the bottom pressure data that pressure monitoring and controlling device acquires, according to set coding
Bottom pressure data conversion at one group of instruction, and is sent an instruction to pulse signal generator by rule；
3.4) it after pulse signal generator receives the instruction that underground central control system is sent, issues according to instruction and is pressed with shaft bottom
The corresponding pulse signal of force data, pulse signal transmit upwards.
In the step 4), ground system is decoded the wireless pulse signals received, obtains the reality of injection well
Bottom pressure data, according to the method that the practical bottom pressure data are adjusted the well head injection rate of injection well, including with
Lower step:
4.1) pulsed signal device receives the pressure pulse signal that downhole system transmission comes, and is transmitted to ground
Central control system；
4.2) after ground central control system receives the pressure pulse signal that the transmission of pulsed signal device comes, by pressure pulse
Signal decoded back is transferred to monitoring interface and shows at bottom pressure data；
4.3) according to bottom pressure data point reuse well head injection rate, to improve the injectability of the injection well.
The invention adopts the above technical scheme, which has the following advantages: 1, bottom pressure number may be implemented in the present invention
According to wireless transmission, do not need the preset cable transmission signal of pit shaft, solve conventional pressure manometers due to shaft column complexity without
Method keeps the problem at long-term lower going-into-well bottom, realizes the real-time monitoring of injection well bottom pressure.2, downhole system is with tubing string tripping in
Shaft bottom does not need complex job, has saved time and construction cost, is a kind of advanced, direct, efficient raising injection well injection
The method of ability.3, the present invention does not need the intensive upload of data since actual bottom pressure monitors, when need to only fix daily
Between upload one group of pressure data (specific data uplink time, frequency is adjustable), remaining time downhole system in a dormant state, and
And system uses long-endurance high energy supplying cell, and long-term (3-5) stable operation of downhole system may be implemented, be not required to
Lower tubular column is frequently played, is not affected the normal production.The present invention can be widely applied in the monitoring of oilfield injection well bottom pressure.
Detailed description of the invention
Fig. 1 is the schematic diagram of bottom pressure telemetering wireless transmitting system of the present invention.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of system that injection well injectability is improved based on bottom pressure telemetering provided by the invention,
Including the ground system 3 that the downhole system 2 at 1 underground implanted layer position of injection well is arranged in and is arranged in outside 1 well head of injection well.
Downhole system 2 is periodically monitored the bottom pressure data of injection well, and obtains nothing according to bottom pressure data encoding
Line pulse signal is sent to ground system 3；Ground system 3 is decoded received wireless pulse signals to obtain actual shaft bottom
After pressure data, it is adjusted according to well head injection rate of the bottom pressure data to injection well 1.
Downhole system 2 includes underground central control system 21, pulse signal generator 22, pressure monitoring and controlling device 23 and supplying cell
24.Wherein, pressure monitoring and controlling device 23 carries out periodical acquisition to bottom pressure data according to the instruction of underground central control system 21, and
The bottom pressure data of acquisition are transmitted through the cable to underground central control system 21；Underground central control system 21 is according to the well received
Control wave generator 22 issues one group of pressure pulse letter corresponding with bottom pressure data after bottom pressure data encoding
Number arrive ground system 3, supplying cell 24 be used for downhole system 2 power.
Ground system 3 includes ground central control system 31, pulsed signal device 32 and monitoring interface 33, pulsed signal
Device 32 is used to receive the pressure pulse signal of downhole system upload, and is transmitted through the cable to ground central control system 31, in ground
The pressure pulse signal received is reduced into bottom pressure data by control system 31, and is shown in monitoring interface 33.
As a preferred embodiment, downhole system 2 is integrated and connected on infusing poly- tubing string, enters with tubing string lower going-into-well rising pouring
At layer position.
As a preferred embodiment, in ground system 3, the setting of pulsed signal device 32 infuses poly- pipeline in well head
On.
As a preferred embodiment, supplying cell 24 uses long-endurance high energy supplying cell, downhole system
It can long-term (3-5) stable operation.
According to the above-mentioned system for improving injection well injectability based on bottom pressure telemetering, the present invention also provides one kind to be based on
The method of bottom pressure telemetering raising injection well injectability, comprising the following steps:
1) downhole system is installed: being surveyed underground central control system 21 with pulse signal generator 22, pressure respectively by cable
It controls device 23 and the connection of supplying cell 24 is integrated, and connect on infusing poly- tubing string, at the implanted layer position of tubing string lower going-into-well bottom；
2) ground system is installed: the setting of pulsed signal device 32 being infused on poly- pipeline in well head, and passes through cable and ground
Face central control system 31 connects, and ground central control system 31 is connect with monitoring interface 33；
3) monitoring time is preset then, downhole system 2 is acquired bottom pressure, and generates and bottom pressure data phase
Corresponding wireless pulse signals are sent to ground system 3；
Bottom pressure monitors the intensive upload for not needing data, and the daily set time is only needed to upload one group of pressure data, tool
Volume data acquisition, uplink time and frequency are controlled by the underground central control system 5 for being embedded with set control program, remaining time underground
System is in a dormant state.Specifically, the following steps are included:
3.1) monitoring time is preset then, underground central control system 21 sends Monitoring instruction by dormant state to working condition
To pressure monitoring and controlling device 23；
3.2) Monitoring instruction based on the received of pressure monitoring and controlling device 23, acquires the bottom pressure data of the implanted layer position, and
Bottom pressure data are transferred to underground central control system 21 by cable；
3.3) after underground central control system 21 receives the bottom pressure data that pressure monitoring and controlling device 23 acquires, according to set
Bottom pressure data conversion at one group of instruction, and is sent an instruction to pulse signal generator 22 by coding rule；
3.4) after pulse signal generator 22 receives the instruction that underground central control system 21 is sent, according to instruction sending and well
The corresponding pulse signal of base pressure force data, pulse signal transmit upwards.
4) ground system 3 is decoded the wireless pulse signals received, obtains the practical bottom pressure number of injection well
According to, the well head injection rate of injection well is adjusted according to the practical bottom pressure data, specifically includes the following steps:
4.1) pulsed signal device 32 receives the pressure pulse signal that downhole system transmission comes, and is transmitted to ground
Face central control system 31；
4.2) ground central control system 31 receives the pressure pulse signal that the transmission of pulsed signal device 32 comes, according to set
Decoding rule by pressure pulse signal decoded back at bottom pressure data, and be transferred to monitoring interface 33 display；
4.3) well head injection rate is reasonably adjusted according to bottom pressure data, to improve the injectability of the injection well.
5) acquisition of bottom pressure data, upload finish, and downhole system reenters dormant state.
6) next monitoring time then, circulating repetition step 3) -5), so that it may realize the bottom pressure of injection well again
Real-time monitoring.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each component, connection type and manufacture craft etc. are all
It can be varied, all equivalents and improvement carried out based on the technical solution of the present invention should not exclude
Except protection scope of the present invention.
Claims (8)
1. a kind of system for improving injection well injectability based on bottom pressure telemetering, it is characterised in that: it includes being arranged in well
Downhole system at lower implanted layer position and the ground system being arranged in outside injection-gathering well head.Downhole system is periodically poly- to note
The bottom pressure data of well are monitored, and send wireless pulse signals to ground system according to bottom pressure data；Ground system
System is decoded received wireless pulse signals to obtain actual bottom pressure data, and according to the bottom pressure data to note
The well head injection rate of poly- well is adjusted.
2. a kind of system for improving injection well injectability based on bottom pressure telemetering as described in claim 1, feature exist
In: the downhole system includes underground central control system, pulse signal generator, pressure monitoring and controlling device and supplying cell；The pressure
The instruction that power measure and control device is sent according to the underground central control system carries out periodical acquisition to bottom pressure data, and will acquisition
Bottom pressure data be transmitted through the cable to the underground central control system；The underground central control system is according to the shaft bottom received
Pulse signal generator described in pressure data coding-control issues one group of pressure pulse signal corresponding with bottom pressure data
To ground system, the supplying cell is used to power to the downhole system.
3. a kind of system for improving injection well injectability based on bottom pressure telemetering as described in claim 1, feature exist
In: the ground system includes ground central control system, pulsed signal device and monitoring interface, and the pulsed signal device connects
The pressure pulse signal that the downhole system uploads is received, and is transmitted through the cable to the ground central control system, in the ground
The pressure pulse signal received is reduced into bottom pressure data by control system, and is shown in the monitoring interface.
4. a kind of system for improving injection well injectability based on bottom pressure telemetering as claimed in claim 2, feature exist
In: downhole system is integrated and connected on infusing poly- tubing string, at the implanted layer position of tubing string lower going-into-well bottom.
5. a kind of system for improving injection well injectability based on bottom pressure telemetering as claimed in claim 3, feature exist
In: the well head that injection well to be monitored is arranged in the pulsed signal device is infused on poly- pipeline.
6. it is a kind of using as described in any one of Claims 1 to 5 system based on bottom pressure telemetering improve injection well injection energy
The method of power, it is characterised in that the following steps are included:
1) install downhole system: by cable by underground central control system respectively with pulse signal generator, pressure monitoring and controlling device and
Supplying cell connection is integrated, and connects on infusing poly- tubing string, at the implanted layer position of tubing string lower going-into-well bottom；
2) ground system is installed: the setting of pulsed signal device being infused on poly- pipeline in well head, and by being controlled in cable and ground
System connection, ground central control system are connect with monitoring interface；
3) monitoring time is preset then, downhole system is acquired bottom pressure, and generates corresponding with bottom pressure data
Wireless pulse signals be sent to ground system；
4) ground system is decoded the wireless pulse signals received, obtains the practical bottom pressure data of injection well, root
The well head injection rate of injection well is adjusted according to the practical bottom pressure data；
5) acquisition of bottom pressure data, upload finish, and downhole system reenters dormant state；
6) next monitoring time then, circulating repetition step 3) -5), realize the real-time monitoring of the bottom pressure of injection well.
7. a kind of method for improving injection well injectability based on bottom pressure telemetering as claimed in claim 6, feature exist
In: in the step 3), downhole system is acquired bottom pressure, and generates wireless arteries and veins corresponding with bottom pressure data
Rush the method that signal is sent to ground system, comprising the following steps:
3.1) monitoring time is preset then, underground central control system sends Monitoring instruction to pressure by dormant state to working condition
Measure and control device；
3.2) pressure monitoring and controlling device Monitoring instruction based on the received, acquires the bottom pressure data of the implanted layer position, and pass through electricity
Bottom pressure data are transferred to underground central control system by cable；
3.3) after underground central control system receives the bottom pressure data that pressure monitoring and controlling device acquires, according to set coding rule
By bottom pressure data conversion at one group of instruction, and send an instruction to pulse signal generator；
3.4) it after pulse signal generator receives the instruction that underground central control system is sent, is issued and bottom pressure number according to instruction
According to corresponding pulse signal, pulse signal transmits upwards.
8. a kind of method for improving injection well injectability based on bottom pressure telemetering as claimed in claim 6, feature exist
In: in the step 4), ground system is decoded the wireless pulse signals received, obtains the real well base pressure of injection well
Force data, the method that the well head injection rate of injection well is adjusted according to the practical bottom pressure data, comprising the following steps:
4.1) pulsed signal device receives the pressure pulse signal that downhole system transmission comes, and is transmitted in ground and controls
System；
4.2) after ground central control system receives the pressure pulse signal that the transmission of pulsed signal device comes, by pressure pulse signal
Decoded back is transferred to monitoring interface and shows at bottom pressure data；
4.3) according to bottom pressure data point reuse well head injection rate, to improve the injectability of the injection well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054875.4A CN109184641A (en) | 2018-09-11 | 2018-09-11 | A kind of system and method that injection well injectability is improved based on bottom pressure telemetering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054875.4A CN109184641A (en) | 2018-09-11 | 2018-09-11 | A kind of system and method that injection well injectability is improved based on bottom pressure telemetering |
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| CN109184641A true CN109184641A (en) | 2019-01-11 |
Family
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| CN201811054875.4A Pending CN109184641A (en) | 2018-09-11 | 2018-09-11 | A kind of system and method that injection well injectability is improved based on bottom pressure telemetering |
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Cited By (1)
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| CN111190365A (en) * | 2019-12-31 | 2020-05-22 | 中国海洋石油集团有限公司 | Two-stage wake-up circuit for underwater acoustic communication and wake-up method thereof |
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Application publication date: 20190111 |
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