CN111306448A - Energy-saving water injection device and method for one-pump-controlled multi-pump - Google Patents

Energy-saving water injection device and method for one-pump-controlled multi-pump Download PDF

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Publication number
CN111306448A
CN111306448A CN202010238026.5A CN202010238026A CN111306448A CN 111306448 A CN111306448 A CN 111306448A CN 202010238026 A CN202010238026 A CN 202010238026A CN 111306448 A CN111306448 A CN 111306448A
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CN
China
Prior art keywords
water injection
pump
pump unit
booster pump
stop valve
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CN202010238026.5A
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Chinese (zh)
Inventor
阮岩
程为彬
陈晨
刘峰
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Xian Shiyou University
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Xian Shiyou University
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Priority to CN202010238026.5A priority Critical patent/CN111306448A/en
Publication of CN111306448A publication Critical patent/CN111306448A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00Pipe-line systems
    • F17D1/08Pipe-line systems for liquids or viscous products
    • F17D1/14Conveying liquids or viscous products by pumping
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20Displacing by water
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00Arrangements for supervising or controlling working operations
    • F17D3/01Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00Arrangements for supervising or controlling working operations
    • F17D3/18Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product

Abstract

The invention belongs to the technical field of industrial control, and particularly relates to an energy-saving water injection device and method with multiple pumps controlled by one pump. The device consists of a water inlet system, a booster pump unit, a first stage-dismantling water injection pump unit, a second stage-dismantling water injection pump unit, a third stage-dismantling water injection pump unit, a header part and a special control system. The invention mainly uses a group of variable frequency speed-regulating booster pumps to connect in series a plurality of groups of parallel-connected grade-removing centrifugal pump units, and carries out high-efficiency automatic water injection according to the terminal requirements. The lift and flow of the water injection system can combine a plurality of groups of split centrifugal pump units which are connected in parallel according to working conditions, and water is injected as required through variable-frequency speed regulation of the booster pump, so that the large-range regulation of the pressure and flow of the system by coarse control and fine regulation is realized, and a plurality of centrifugal pumps can work in a high-efficiency area at the same time. Each sensor sends the acquired real-time signals to a special control system, and an automatic water injection technology with the functions of automatic engineering parameter acquisition, system interlocking protection, automatic start and stop and the like is realized.

Description

Energy-saving water injection device and method for one-pump-controlled multi-pump
Technical Field
The invention belongs to the technical field of industrial control, particularly relates to a pump control technology and system control, and particularly relates to an energy-saving water injection device and method for one pump control multi-pump.
Background
In the process of oilfield water injection, when the water injection pressure and flow required by a pipeline are changed, the coordination of work among water injection units is complex, and all links in the water injection process need manual execution, so that the automation degree is low, the information feedback speed is low, the water injection parameters cannot be adjusted in time, and the range is limited.
The common centrifugal pump unit in the traditional water injection system has low efficiency and high water supply unit consumption, and the system has no regulation function; meanwhile, the water injection site often faces the problems of small discharge capacity and large change of water injection demand. The pressure and flow of the outlet of a plurality of traditional water injection centrifugal pumps meet the requirements by adjusting the opening of the valves at the outlet of the centrifugal pumps, so that the outlet valves cannot be completely opened, and are usually operated under a pressure build-up condition, so that energy is wasted on the valves; although the direct high-pressure large frequency conversion system in recent years realizes adjustable pressure and flow, the centrifugal pump deviates from a high-efficiency area to reduce the pump efficiency.
Disclosure of Invention
The invention aims to provide an energy-saving water injection device and method with one pump for controlling multiple pumps aiming at the conditions of large load change in a water injection site and unsatisfactory adjustable effect of a water injection centrifugal pump; the water injection centrifugal pump units which run in parallel are disassembled, a booster pump unit is established in front of the water injection centrifugal pump units, the change of the water injection amount is realized by adjusting the rotating speed of the booster pump, and the water injection work can be efficiently and quickly completed. The invention can realize that a plurality of centrifugal pumps work in a high-efficiency area simultaneously, the pressure flow of the system can be firstly coarsely controlled and then finely adjusted, the large-scale pressure flow adjustment is realized, and the automatic water injection technology has the functions of automatic acquisition of engineering parameters, system interlocking protection, automatic start-stop and the like.
In order to achieve the purpose, the invention discloses an energy-saving water injection device with a pump control and a plurality of pumps, which comprises a water inlet system, a booster pump unit, a first split-level water injection pump unit, a second split-level water injection pump unit, a third split-level water injection pump unit, a header part and a special control system.
The first, second and third split-level water injection pump units are connected in parallel, the output end of the first, second and third split-level water injection pump units is connected with the manifold part, and the inlet end of the first, second and third split-level water injection pump units is sequentially connected with the water inlet system and the booster pump unit; the special control system respectively controls the water inlet system, the booster pump unit, the first split-level water injection pump unit, the second split-level water injection pump unit, the third split-level water injection pump unit and the header part.
Wherein, water inlet system including filter room, water storage tank group, level sensor, filter room and water storage tank group and pass through high-pressure line and connect, level sensor is located water storage tank group for the liquid level of monitoring water storage tank group. The water inlet system provides qualified and sufficient water quantity for the device.
The booster pump unit comprises a first stop valve of the booster pump unit, a second stop valve of the booster pump unit, a third stop valve of the booster pump unit, a booster pump and a pressure sensor of the booster pump unit. The second stop valve of the booster pump group, the booster pump and the third stop valve of the booster pump group are connected in sequence and then connected in parallel with the first stop valve of the booster pump group, and then connected in series with the pressure sensor of the booster pump group.
The first stage water injection pump unit of tearing open including the first stop valve of the first stage water injection pump unit of tearing open, first water injection pump, the first stage water injection pump unit second stop valve of tearing open, first stage water injection pump unit pressure sensor and the first check valve of tearing open that connect gradually.
The second stage-splitting water injection pump unit comprises a first stop valve of the second stage-splitting water injection pump unit, a second water injection pump, a second stop valve of the second stage-splitting water injection pump unit, a pressure sensor of the second stage-splitting water injection pump unit and a second check valve which are sequentially connected.
The third water injection pump unit of tearing open level is including the first stop valve of third water injection pump unit, third water injection pump unit second stop valve, third water injection pump unit pressure sensor and the third check valve are torn open to the third that connects gradually.
The collecting pipe part comprises a first collecting pipe part stop valve, a second collecting pipe part stop valve, a third collecting pipe part stop valve, a collecting pipe part pressure sensor and a flow sensor. The first stop valve of the collecting pipe part, the second stop valve of the collecting pipe part and the third stop valve of the collecting pipe part are connected in parallel and then are sequentially connected with the flow sensor and the pressure sensor of the collecting pipe part. The signals of the pressure sensor and the flow sensor are sent to a special control system, and the flow and the pressure required by the special control system are determined by the water consumption of the header terminal.
The special control system comprises a control cabinet, a computer monitoring system and a variable frequency speed regulation control system. The computer monitoring system, the variable frequency speed regulation control system and the control cabinet are connected in a wired or wireless mode. The variable-frequency speed regulation control system is connected with the booster pump, changes the flow and the pressure of the outlet of the booster pump unit by controlling the rotating speed of the booster pump, and indirectly controls the outlet flow and the pressure of the first split-level water injection pump unit, the second split-level water injection pump unit and the third split-level water injection pump unit at the same time. The special control system performs optimization analysis on the acquired pressure, flow and liquid level signals, gives a control instruction, and adjusts the on-off of each device through the control cabinet to realize the functions of control, interlocking protection, automatic start-stop and the like.
The variable frequency speed regulation control system is connected with the booster pump unit, changes the flow and the pressure of the outlet of the booster pump unit by controlling the rotating speed of the booster pump unit, and indirectly controls the outlet flow and the pressure of the first deporting water injection pump unit, the second deporting water injection pump unit and the third deporting water injection pump unit at the same time.
The invention also discloses an energy-saving water injection method of one pump-controlled multi-pump, which comprises the following steps:
(1) screening of application conditions
The field application needs to satisfy one of the following conditions:
① the pump station needs to be lifted and the pressure and flow rate can be adjusted in a large range;
② the pump pipe pressure difference of the pump station needs to be reduced;
③ need to improve centrifugal pump efficiency;
④, the automation level of the pump station needs to be improved to realize the automatic data acquisition, automatic start and stop and interlocking protection, ⑤ the water injection system needs to be optimized, including the optimization of the pipe network and the pump station simultaneously.
(2) Determination of the embodiment
Determining the number of the multiple pumps controlled by one pump, the number of water injection pumps needing stage removal and the stage number of stage removal according to the process and the field requirement of the water injection station; the booster pump unit determines the pressure shared by the booster pump unit according to the parameter of the water injection pump level removal, matches the parameter of the booster pump unit, adjusts the pressure flow of the device through the variable frequency speed regulation of the booster pump unit, and provides the preposed pressure for the water injection pump.
(3) Arrangement of booster pump unit
The booster pump is configured, the installation position of the booster pump is firstly determined, the booster pump is connected into the existing system in a bypass mode, the use of the existing process is not influenced, and the booster pump is connected into the existing system when needed.
(4) Configuration of dedicated control systems
Configuring a control cabinet of a special control system, a computer monitoring system and a variable frequency speed regulation control system, and determining the specific installation position of the control cabinet.
(5) Construction and operation in situ
And (3) performing field construction according to the configuration determined in the steps (3) and (4), performing field operation according to the implementation scheme determined in the step (2), wherein the pressure flow of the centrifugal pump unit can be roughly controlled and then finely adjusted, so that the pressure flow adjustment in a large range is realized, and automatic water injection with the functions of engineering parameter automatic acquisition, system interlock protection and automatic start-stop is realized.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) according to the invention, the water injection centrifugal pumps are subjected to level splitting, the pumps work in a high-efficiency area, the booster pumps are reasonably matched according to parameters of the level splitting, and the pressure and the flow of the system are controlled by carrying out variable-frequency speed regulation on the booster pumps, so that outlet valves of the water injection centrifugal pumps can be completely opened, and energy wasted on the valves can be saved.
(2) The lift and flow of the water injection system can be combined by a plurality of groups of parallel-connected stage-splitting centrifugal pumps according to working conditions, the number of working stations of the water injection pump is determined, and then the frequency conversion and speed regulation are carried out on the matched booster pump, so that the coarse control and the fine control are firstly carried out, and the lift and the flow are controlled in a large range.
(3) The booster pump of the invention improves the inlet pressure of a plurality of water injection centrifugal pumps, thereby improving the working condition of the water injection centrifugal pumps, and the working point of the water injection centrifugal pumps moves to a high-efficiency area, so the efficiency of the water injection centrifugal pumps is also improved.
(4) The water injection system can automatically adjust the pressure and the flow, so that the pressure difference of pump pipes of a plurality of centrifugal pumps can be reduced to the maximum extent until the pressure tends to zero; the reduction of the pressure difference of the pump pipe is actually the improvement of the useful power of the system, thereby achieving the purpose of energy conservation; the reasonable matching of the water injection centrifugal pump and the booster pump can improve the system efficiency and reduce the load of the booster pump.
(5) The flow meters, pressure sensors and the like on the pipelines, the booster pump unit and the water injection centrifugal pumps transmit the acquired real-time data to a developed special control system, optimize and analyze the acquired signals, give reasonable control instructions, and adjust the on-off of each device through the control cabinet to realize automatic water injection and monitoring protection.
Drawings
FIG. 1 is a schematic structure and a flow chart of an energy-saving water injection device with one pump controlling multiple pumps.
The specific implementation mode is as follows:
as shown in figure 1, the energy-saving water injection device with one pump for controlling multiple pumps comprises a water inlet system 1, a booster pump unit 2, a first split-level water injection pump unit 3, a second split-level water injection pump unit 4, a third split-level water injection pump unit 5, a header part 6 and a special control system 7.
The first, second and third split-level water injection pump units 3, 4 and 5 are connected in parallel, the output end is connected with the manifold part 6, and the inlet end is connected with the water inlet system 1 and the booster pump unit 2 in sequence; the special control system 7 respectively controls the water inlet system 1, the booster pump unit 2, the first stage-splitting water injection pump unit 3, the second stage-splitting water injection pump unit 4, the third stage-splitting water injection pump unit 5 and the header part 6.
The water inlet system 1 comprises a filtering room 101, a water storage tank set 102 and a liquid level sensor 103, wherein the filtering room 101 is connected with the water storage tank set 102 through a high-pressure pipeline, and the liquid level sensor 103 is positioned in the water storage tank set 102 and used for monitoring the liquid level of the water storage tank set 102. The water inlet system provides qualified and sufficient water quantity for the device.
The booster pump unit 2 comprises a booster pump group first stop valve 201, a booster pump group second stop valve 202, a booster pump group third stop valve 204, a booster pump 203 and a booster pump group pressure sensor 205. The booster pump group second stop valve 202, the booster pump 203, and the booster pump group third stop valve 204 are connected in sequence, then connected in parallel with the booster pump group first stop valve 201, and then connected in series with the booster pump group pressure sensor 205.
The first water injection pump unit 3 includes a first stop valve 301, a first water injection pump 302, a second stop valve 303, a pressure sensor 304 and a first check valve 305, which are connected in sequence.
The second stage-splitting water injection pump unit 4 comprises a second stage-splitting water injection pump unit first stop valve 401, a second water injection pump 402, a second stage-splitting water injection pump unit second stop valve 403, a second stage-splitting water injection pump unit pressure sensor 404 and a second check valve 405 which are connected in sequence.
The third stage-splitting water injection pump unit 5 comprises a third stage-splitting water injection pump unit first stop valve 501, a third water injection pump 502, a third stage-splitting water injection pump unit second stop valve 503, a third stage-splitting water injection pump unit pressure sensor 504 and a third stop valve 505 which are sequentially connected.
The header portion 6 includes a header portion first cut valve 601, a header portion second cut valve 602, a header portion third cut valve 603, a header portion pressure sensor 604, and a flow sensor 605. The first header portion stop valve 601, the second header portion stop valve 602, and the third header portion stop valve 603 are connected in parallel and then connected to the flow sensor 605 and the header portion pressure sensor 604 in this order. The signals of the pressure sensor and the flow sensor are sent to a special control system, and the flow and the pressure required by the special control system are determined by the water consumption of the header terminal.
The special control system 7 comprises a control cabinet 701, a computer monitoring system 702 and a variable frequency speed control system 703. The computer monitoring system 702, the variable-frequency speed-regulating control system 703 and the control cabinet 701 are connected in a wired or wireless manner. The variable-frequency speed control system 703 is connected with the booster pump 203, changes the flow and pressure of the outlet of the booster pump unit 2 by controlling the rotating speed of the booster pump 203, and indirectly controls the outlet flow and pressure of the first, second and third water injection pump units 3, 4 and 5. The special control system performs optimization analysis on the acquired pressure, flow and liquid level signals, gives a control instruction, and adjusts the on-off of each device through the control cabinet to realize the functions of control, interlocking protection, automatic start-stop and the like.
The variable-frequency speed regulation control system is connected with the booster pump unit, changes the flow and the pressure of an outlet of the booster pump unit by controlling the rotating speed of the booster pump unit, and indirectly controls the flow and the pressure of the outlet of the first, second and third split-level water injection pump units at the same time.
The device is utilized to realize an energy-saving water injection method of one-pump-controlled multi-pump, and the method specifically comprises the following steps:
(1) screening of application conditions
The field application needs to satisfy one of the following conditions:
① the pump station needs to be lifted and the pressure and flow rate can be adjusted in a large range;
② the pump pipe pressure difference of the pump station needs to be reduced;
③ need to improve centrifugal pump efficiency;
④, the automation level of the pump station needs to be improved to realize the automatic data acquisition, automatic start and stop and interlocking protection, ⑤ the water injection system needs to be optimized, including the optimization of the pipe network and the pump station simultaneously.
(2) Determination of the embodiment
Determining the number of the multiple pumps controlled by one pump, the number of water injection pumps needing stage removal and the stage number of stage removal according to the process and the field requirement of the water injection station; the booster pump unit determines the pressure shared by the booster pump unit according to the parameter of the water injection pump level removal, matches the parameter of the booster pump unit, adjusts the pressure flow of the device through the variable frequency speed regulation of the booster pump unit, and provides the preposed pressure for the water injection pump.
(3) Arrangement of booster pump unit
The booster pump is configured, the installation position of the booster pump is firstly determined, the booster pump is connected into the existing system in a bypass mode, the use of the existing process is not influenced, and the booster pump is connected into the existing system when needed.
(4) Configuration of dedicated control systems
Configuring a control cabinet of a special control system, a computer monitoring system and a variable frequency speed regulation control system, and determining the specific installation position of the control cabinet.
(5) Construction and operation in situ
And (3) performing field construction according to the configuration determined in the steps (3) and (4), performing field operation according to the implementation scheme determined in the step (2), wherein the pressure flow of the centrifugal pump unit can be roughly controlled and then finely adjusted, so that the pressure flow adjustment in a large range is realized, and automatic water injection with the functions of engineering parameter automatic acquisition, system interlock protection and automatic start-stop is realized.
Example 1: prolonging water injection station of oil production plant in oil field
The operation condition of the water injection pump station before implementing the invention is as follows:
single pump operating parameters: pressure 2MPa, flow 38.3m3H, current 82A, voltage 400V, power factor 0.85 and header pressure 1.7 MPa.
Through calculation: the active power is 21kW and the active power is 48kW (P for the two pumps)196kW), unit efficiency is 43%, and water injection unit consumption is 1.25 kW.h/m3The pump pipe pressure difference is 0.3MPa (0.6 MPa for two pumps).
There are problems: the water supply unit has low efficiency, high water supply unit consumption, large pump pipe pressure difference and no automatic regulation function of the system.
The method comprises the following specific steps:
(1) screening of application conditions
The following two conditions are met on site:
① the pump pipe pressure difference of the pump station needs to be reduced;
② there is a need to improve centrifugal pump efficiency.
The present invention can be carried out while satisfying the screening conditions of the present invention.
(2) Determination of the embodiment
According to the water supply station process and the field requirement, a scheme of controlling two pumps by one pump is determined. Three pumps on site need to be disassembled at one level, and two pumps are used and one is prepared; and determining that the booster pump unit shares pressure within 0.5MPa according to the parameter of the water injection pump with one stage, adjusting the pressure flow of the device by the variable frequency speed regulation of the booster pump unit, and providing preposed pressure for the water injection pump.
(3) Arrangement of booster pump unit
Firstly, the installation position of a booster pump unit is determined, and the existing pump room is considered to be not suitable for adding equipment through field investigation, so that a booster pump room needs to be additionally built. The booster pump set is connected to the existing system in a bypass mode, so that the use of the existing process is not influenced, and the booster pump set is connected to the booster pump set when needed.
(4) Configuration of dedicated control systems
And configuring a control cabinet, a computer monitoring system and a variable-frequency speed-regulating control system of the special control system according to the requirements, and determining the specific installation position.
(5) Construction and operation in situ
Performing site construction according to the configuration determined in the steps (3) and (4), and performing site operation according to the implementation scheme determined in the step (2), wherein the effects are as follows:
the operation parameters are as follows: the pressure of the water injection pump is 1.5MPa, the pressure of the booster pump is 0.5MPa, the total pressure is 2.0MPa, and the power of the booster pump is 6 KW.
Through calculation: the power of the water injection pumps is 55KW (two pumps with 58 percent of pump efficiency), and the total running power of the system is P055KW +6KW is 61KW, the unit consumption of water injection is 0.79 kW.h/m3The pump pipe differential pressure is 0.1 MPa.
Compared with the power of the water injection system before the invention in operation:
△P=P1-P0=96–61=35KW
electricity is saved every day: 35KW multiplied by 24h 840KWh
Electricity is saved each year: 840KWh × 360 ═ 302400KWh
Electricity per degree (0.6 yuan per mains): 302400KWh × 0.6 yuan/KWh 18 ten thousand yuan
The unit consumption is reduced to 1.25-0.79 and 0.46 kW.h/m3
The pressure drop of the pump pipe is 0.6-0.1 MPa
In the invention, the efficiency of the water supply pump is improved from 43% to 58%, and the unit consumption of water injection is 1.25 kW.h/m3The power is reduced to 0.79 kW.h/m3And the pressure difference of the pump pipe is greatly reduced, the pressure and the flow of the system are adjustable within a certain range, and the energy-saving effect is obvious.
Example 2: water injection station for certain oil production plant in Xinjiang oil field
The operation condition of the water injection pump station before implementing the invention is as follows: operating parameters of a water injection system: the station output pressure is 6MPa, and the flow rate is 148m3/h。
There are problems: the pump station's discharge capacity can not satisfy the water supply demand yet, and degree of automation is low.
The method comprises the following specific steps:
(1) screening of application conditions
The following two conditions are met on site:
① needs to lift the pump station, and has the function of adjusting pressure and flow in a large range;
②, the automation level of the pump station needs to be improved, and automatic data acquisition, automatic start and stop and interlocking protection are realized.
The present invention can be carried out while satisfying the screening conditions of the present invention.
(2) Determination of the embodiment
According to the process and the field requirements of the water injection station, the scheme of combination according to needs is determined, three pumps can be controlled by one or two, switching is carried out according to needs, the unused pumps are reserved, and the three pumps on the field do not need to be disassembled; the booster pump unit is determined to share the pressure within 1MPa according to the parameters of the water injection pump, the pressure flow of the device is adjusted through the variable frequency speed regulation of the booster pump unit, and meanwhile, the preposed pressure is provided for the water injection pump.
(3) Arrangement of booster pump unit
Firstly, the installation position of the booster pump unit is determined, the booster pump unit can be placed in the existing pump room through field investigation, the booster pump unit is connected into the existing system in a bypass mode, the use of the existing process is not influenced, and the booster pump unit is connected into the existing system when needed.
(4) Configuration of dedicated control systems
And configuring a control cabinet, a computer monitoring system and a variable-frequency speed-regulating control system of the special control system according to the requirements, and determining the specific installation position.
(5) Construction and operation in situ
Performing site construction according to the configuration determined in the steps (3) and (4), and performing site operation according to the implementation scheme determined in the step (2), wherein the effects are as follows:
the operation parameters are as follows: the station output pressure is 6MPa, and the flow rate is 180m3/h。
Compared with the operation of a water injection system before invention:
adding water every hour: 180m3/h-148m3/h=32m3/h
Adding water in one year: 32m3H 24X 360 276480 ton
The pressure adjusting range of the water injection system in the embodiment of the invention is 5.2-6 MPa, the flow can be adjusted according to needs in a large range, the maximum lifting is 20%, the water injection requirement of an oil field can be met, the automatic acquisition, the automatic start-stop and the interlocking protection of system data are realized, and the automation level of a pump station is improved.
The energy-saving water injection method with one pump controlling multiple pumps has the function of greatly reducing the unit consumption of water injection, can simultaneously promote the discharge capacity of the pump station in a large range, has adjustable pressure and flow within the range of 20 percent, keeps multiple water injection pumps working in a high-efficiency area all the time, and is easy to realize the dynamic balance between the pump station and a pipe network. From the development of oil fields, the water injection amount is increased year by year, the discharge capacity of a pump station can be improved by an energy-saving water injection method of controlling multiple pumps by one pump, and the problem of adjusting the pressure and the flow according to needs can be solved without adding other water injection equipment.

Claims (10)

1. An energy-saving water injection device with a plurality of pumps controlled by one pump is characterized by comprising a water inlet system, a booster pump unit, a first split-level water injection pump unit, a second split-level water injection pump unit, a third split-level water injection pump unit, a header part and a special control system; the first, second and third split-level water injection pump units are connected in parallel, the output end of the first, second and third split-level water injection pump units is connected with the manifold part, and the inlet end of the first, second and third split-level water injection pump units is sequentially connected with the water inlet system and the booster pump unit; the special control system respectively controls the water inlet system, the booster pump unit, the first split-level water injection pump unit, the second split-level water injection pump unit, the third split-level water injection pump unit and the header part.
2. The energy-saving water injection device with one pump for multiple pumps as claimed in claim 1, wherein the water inlet system comprises a filtering chamber, a water storage tank set, and a liquid level sensor, the filtering chamber and the water storage tank set are connected through a pipeline, the liquid level sensor is positioned in the water storage tank set and used for monitoring the liquid level of the water storage tank set, and the water inlet system provides qualified and sufficient water for the device.
3. The energy-saving water injection device with one pump for multiple pumps as claimed in claim 1, wherein the booster pump unit comprises a first stop valve of the booster pump group, a second stop valve of the booster pump group, a third stop valve of the booster pump group, the booster pump and a pressure sensor of the booster pump group; the second stop valve of the booster pump group, the booster pump and the third stop valve of the booster pump group are connected in sequence and then connected in parallel with the first stop valve of the booster pump group, and then connected in series with the pressure sensor of the booster pump group.
4. The energy-saving water injection device with one pump controlling multiple pumps as claimed in claim 1, wherein the first stage-splitting water injection pump unit comprises a first stop valve of the first stage-splitting water injection pump unit, a first water injection pump, a second stop valve of the first stage-splitting water injection pump unit, a pressure sensor of the first stage-splitting water injection pump unit and a first check valve which are connected in sequence.
5. The energy-saving water injection device with one pump-controlled and multiple pumps as claimed in claim 1, wherein the second water injection pump unit comprises a first stop valve of the second water injection pump unit, a second water injection pump, a second stop valve of the second water injection pump unit, a pressure sensor of the second water injection pump unit and a second check valve which are connected in sequence.
6. The energy-saving water injection device with one pump-controlled and multiple pumps as claimed in claim 1, wherein the third water injection pump unit comprises a first stop valve of the third water injection pump unit, a third water injection pump, a second stop valve of the third water injection pump unit, a pressure sensor of the third water injection pump unit and a third check valve which are connected in sequence.
7. The energy-saving water injection device with one pump controlling multiple pumps as claimed in claim 1, wherein the header part comprises a header part first stop valve, a header part second stop valve, a header part third stop valve, a header part pressure sensor and a flow sensor; the first stop valve of the manifold part, the second stop valve of the manifold part and the third stop valve of the manifold part are connected in parallel and then are sequentially connected with the flow sensor and the pressure sensor of the manifold part; the signals of the pressure sensor and the flow sensor are sent to a special control system, and the flow and the pressure required by the special control system are determined by the water consumption of the header terminal.
8. The energy-saving water injection device with one pump for multiple pumps as claimed in claim 1, wherein the special control system comprises a control cabinet, a computer monitoring system and a variable frequency speed control system; the computer monitoring system, the variable-frequency speed regulation control system and the control cabinet are connected in a wired or wireless mode; the special control system performs optimization analysis on the acquired pressure, flow and liquid level signals, gives a control instruction, and adjusts the on-off of each device through the control cabinet to realize the functions of control, interlocking protection, automatic start-stop and the like.
9. The energy-saving water injection device with one pump controlling multiple pumps as claimed in claim 8, wherein the variable frequency speed control system is connected to the booster pump set, and changes the flow and pressure of the outlet of the booster pump set by controlling the rotation speed of the booster pump set, and indirectly controls the flow and pressure of the outlet of the first, second and third deporting water injection pump sets.
10. The energy-saving water injection method of the pump-controlled multi-pump is characterized by comprising the following steps:
(1) screening of application conditions
The field application needs to satisfy one of the following conditions:
① the pump station needs to be lifted and the pressure and flow rate can be adjusted in a large range;
② the pump pipe pressure difference of the pump station needs to be reduced;
③ need to improve centrifugal pump efficiency;
④ it needs to improve the automation level of the pump station to realize the automatic data collection, automatic start and stop and interlocking protection, ⑤ it needs to optimize the water injection system, including optimizing the pipe network and the pump station at the same time;
(2) determination of the embodiment
Determining the number of the multiple pumps controlled by one pump, the number of water injection pumps needing stage removal and the stage number of stage removal according to the process and the field requirement of the water injection station; the booster pump unit determines the pressure shared by the booster pump unit according to the parameters of the water injection pump disassembly stage, matches the parameters of the booster pump unit, adjusts the pressure flow of the device by the frequency conversion speed regulation of the booster pump unit, and provides the preposed pressure for the water injection pump;
(3) arrangement of booster pump unit
A booster pump is configured, the installation position of the booster pump is firstly determined, the booster pump is connected to the existing system in a bypass mode, the use of the existing process is not influenced, and the booster pump is connected to the existing system when needed;
(4) configuration of dedicated control systems
Configuring a control cabinet, a computer monitoring system and a variable frequency speed regulation control system of the special control system, and determining the specific installation position of the control cabinet, the computer monitoring system and the variable frequency speed regulation control system;
(5) construction and operation in situ
And (3) performing field construction according to the configuration determined in the steps (3) and (4), performing field operation according to the implementation scheme determined in the step (2), wherein the pressure flow of the centrifugal pump unit can be roughly controlled and then finely adjusted, so that the pressure flow adjustment in a large range is realized, and automatic water injection with the functions of engineering parameter automatic acquisition, system interlock protection and automatic start-stop is realized.
CN202010238026.5A 2020-03-30 2020-03-30 Energy-saving water injection device and method for one-pump-controlled multi-pump Pending CN111306448A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112836358A (en) * 2021-01-18 2021-05-25 西安石油大学 Method for judging optimal operation mode of large-scale oil field water injection pipe network
CN114754291A (en) * 2022-03-28 2022-07-15 浙江英集动力科技有限公司 Reverse steam supply pressurization regulation and control system and method adaptive to working conditions
CN114754291B (en) * 2022-03-28 2023-11-24 浙江英集动力科技有限公司 Self-adaptive working condition reverse steam supply pressurization regulation and control system and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112836358A (en) * 2021-01-18 2021-05-25 西安石油大学 Method for judging optimal operation mode of large-scale oil field water injection pipe network
CN112836358B (en) * 2021-01-18 2022-06-21 西安石油大学 Method for judging optimal operation mode of large-scale oil field water injection pipe network
CN114754291A (en) * 2022-03-28 2022-07-15 浙江英集动力科技有限公司 Reverse steam supply pressurization regulation and control system and method adaptive to working conditions
CN114754291B (en) * 2022-03-28 2023-11-24 浙江英集动力科技有限公司 Self-adaptive working condition reverse steam supply pressurization regulation and control system and method

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