CN111577227B - Linkage control method for oil field water source well and water supply and injection station - Google Patents
Linkage control method for oil field water source well and water supply and injection station Download PDFInfo
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- CN111577227B CN111577227B CN202010372707.0A CN202010372707A CN111577227B CN 111577227 B CN111577227 B CN 111577227B CN 202010372707 A CN202010372707 A CN 202010372707A CN 111577227 B CN111577227 B CN 111577227B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 577
- 238000002347 injection Methods 0.000 title claims abstract description 60
- 239000007924 injection Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002332 oil field water Substances 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- 239000008400 supply water Substances 0.000 claims abstract description 16
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims description 27
- 235000020681 well water Nutrition 0.000 claims description 19
- 239000002349 well water Substances 0.000 claims description 19
- 239000013307 optical fiber Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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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
- E21B43/20—Displacing by water
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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Abstract
The invention discloses a linkage control method for an oil field water source well and a water supply and injection station, which comprises the following steps: firstly, starting a first water source well to supply water for a water storage tank; secondly, adding a water source well to supply water for the water storage tank; and thirdly, monitoring the liquid level change of the water storage tank in real time to increase and decrease the water supply of the water source well. The invention uses the emptying electromagnetic valve on the emptying pipe to discharge the air in the pipe in advance, avoids the problems that the electric submersible pump cannot be started due to larger back pressure of the wellhead of the water source well and overlarge starting current when the electric submersible pump is started, adopts the frequency converter to control the electric submersible pump, saves electricity and energy, uses the inclined connecting water pipe and the check valve to cooperate with accumulated water flow to discharge the air in the pipe and reduce the pressure in the pipe, uses the three-phase electric parameter acquisition module to detect the fault of the electric submersible pump, and uses the linkage and cooperative work of a plurality of water source well control units according to the water level in the water storage tank, thereby having high efficiency.
Description
Technical Field
The invention belongs to the technical field of linkage control of an oil field water source well and a water supply and injection station, and particularly relates to a linkage control method of the oil field water source well and the water supply and injection station.
Background
Water with satisfactory quality is injected into an oil layer from a water injection well by using water injection equipment to maintain the pressure of the oil layer, the process is called oil field water injection, and the oil field water injection is one of important means for supplementing energy to a stratum and improving the oil field recovery ratio in the oil field development process. The level of the water injection well management technology determines the development effect of an oil field and also determines the development service life of the oil field, the water source of the water injection well comes from a water supply and injection station on the ground, the water source for the water injection station is provided by a water source well or a plurality of water source wells, the linkage management of the existing oil field water source well and the water supply and injection station is not standard, the well workover field supervision is not in place, the damage of well workover to water source well control and communication equipment is serious, the problem discovery needs manual work to be investigated on the field, the water supply of the water injection well is not high, the efficiency is low, the potential safety hazard is more, the occupied area of the oil field is large, the positions of part of the water source wells are far, the communication condition is poor, and the linkage control method of the oil field water source.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a linkage control method for an oil field water source well and a water supply and injection station, wherein air in the water source well is discharged in advance by using an air discharge electromagnetic valve on an air discharge pipe, so that the problem that the electric submersible pump cannot be started due to overlarge starting current when the electric submersible pump is started is solved, the electric submersible pump is controlled by using a frequency converter, electricity and energy are saved, the inclined connecting water pipe and a check valve are matched with accumulated water flow to extrude the air in the water pipe and reduce the pressure in the water pipe, the electric submersible pump is detected by using a three-phase electric parameter acquisition module, and a plurality of water source well control units work in a linkage mode according to the water level in a water storage tank, so that the efficiency is high, and the linkage control method is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: a linkage control method for an oil field water source well and a water supply and injection station is characterized in that a water source well control unit for controlling the water outlet of a corresponding water source well is arranged outside the water source well, the water supply and injection station comprises a water storage tank and a water supply and injection station control terminal for monitoring the liquid level change of the water storage tank, the number of the water source well control units is equal to that of the water source wells and corresponds to that of the water source wells one by one, the water supply and injection station control terminal and the water source well control unit are communicated with a remote monitoring host, the water supply and injection station control terminal comprises a water supply and injection station microcontroller and a water supply and injection station communication module, the water supply and injection station communication module is connected with the water supply and injection station microcontroller and communicated with the remote monitoring host, a water storage tank liquid level meter is arranged in the water storage tank, and the signal output end of the water;
the water source well control unit comprises a water source well control cabinet arranged beside a water source well, a water source well controller and a frequency converter, wherein the water source well controller and the frequency converter are arranged in the water source well control cabinet, the frequency converter is used for controlling the operation of the electric submersible pump in a frequency conversion mode, the water source well controller is connected with a water source well communication module communicated with a remote monitoring host, a current transformer, a voltage transformer and a temperature sensor are used for collecting working parameters of the electric submersible pump, the current transformer, the voltage transformer and the temperature sensor are all connected with the water source well controller through a three-phase parameter collecting module, the electric submersible pump is arranged in the water source well, the output end of the electric submersible pump is communicated with a connecting water pipe on the ground through a water source well water leading pipe, the connecting water pipe is communicated with a water inlet pipe of a water storage tank through a water conveying pipe and a limiting pipe in sequence, a pressure sensor is arranged on a pipe section of the water source, the water source well water diversion pipe is characterized in that one end, close to a water inlet pipe of the water storage tank, of the limiting pipe is higher than one end, connected with a connecting water pipe, of the water delivery pipe, the other end, connected with the connecting water pipe, of the water delivery pipe is higher than one end, connected with a water source well water diversion pipe, of the connecting water pipe, a check valve is mounted on the connecting water pipe, an emptying pipe is arranged on one side, close to the water source well water diversion pipe, of the upper stop return valve of the connecting water pipe, an electromagnetic flowmeter is mounted on one side, away from the water source well water diversion pipe, of the upper stop return valve of the connecting;
the pressure sensor, the electromagnetic flowmeter and the water flow sensor are all connected with the water source well controller, and the emptying electromagnetic valve is controlled by the water source well controller;
the method is characterized by comprising the following steps:
step one, starting a first water source well to supply water for a water storage tank, and the process is as follows:
step 101, a remote monitoring host controls a water source well control unit corresponding to a first water source well to work, and before the water source well control unit works, a pipe from a check valve to the tail end of a limiting pipe is filled with water in advance;
the water source well controller firstly controls the emptying electromagnetic valve to be opened, after the photosensitive sensor senses external light, the water source well controller then controls the electrical switch to be closed, the frequency converter is started and drives the electric submersible pump to work according to the liquid level height in the water storage tank, and when the water flow sensor detects that water flows through, the water source well controller controls the emptying electromagnetic valve to be closed;
the photosensitive sensor is arranged on the emptying pipe and positioned on the pipe wall of the emptying electromagnetic valve close to the connecting water pipe, and the electric switch is arranged on a power supply circuit between the frequency converter and the power supply;
102, acquiring working parameters of the electric submersible pump by using a current transformer, a voltage transformer and a temperature sensor, transmitting the working parameters to a three-phase parameter acquisition module for processing, controlling an electric switch to be closed by using a water source well controller when the electric submersible pump has a fault, stopping the electric submersible pump, controlling a water source well control unit corresponding to the other water source well to work by using a remote monitoring host computer, regarding the other water source well as a first water source well, and executing a step 101; when the working parameters of the electric submersible pump are normal, executing step 103;
103, adjusting the output frequency by the frequency converter according to the liquid level height in the water storage tank, and supplying water to the water storage tank by using the first water source well when the liquid level height in the water storage tank is maintained within the liquid level height threshold range; when the water supply amount of the water storage tank is less than the water outlet amount, executing the second step;
step two, adding a water source well to supply water for the water storage tank, wherein the process is as follows:
step 201, the remote monitoring host controls the added water source well control unit corresponding to the water source well to work, and before the water source well control unit works, the water source well control unit fills water in a pipe from the check valve to the tail end of the limiting pipe in advance;
the water source well controller firstly controls the emptying electromagnetic valve to be opened, after the photosensitive sensor senses external light, the water source well controller then controls the electrical switch to be closed, the frequency converter is started and drives the electric submersible pump to work according to the liquid level height in the water storage tank, and when the water flow sensor detects that water flows through, the water source well controller controls the emptying electromagnetic valve to be closed;
202, acquiring working parameters of the electric submersible pump by using a current transformer, a voltage transformer and a temperature sensor, transmitting the working parameters to a three-phase parameter acquisition module for processing, controlling an electric switch to be closed by using a water source well controller when the electric submersible pump has a fault, stopping the electric submersible pump from working, controlling a water source well control unit corresponding to another water source well which does not work by using a remote monitoring host to work, regarding the other water source well which does not work as an added water source well, and executing step 201; when the working parameters of the electric submersible pump are normal, executing step 203;
step 203, the frequency converter adjusts output frequency according to the liquid level height in the water storage tank, and when the liquid level height in the water storage tank is maintained within the liquid level height threshold range, the first water source well and the added water source wells are used for supplying water to the water storage tank together; when the water supply amount of the water storage tank is less than the water yield, the second step is circulated until the liquid level height in the water storage tank is maintained within the liquid level height threshold range;
step three, monitoring the liquid level change of the water storage tank in real time to increase or decrease the water supply of the water source well: when the working frequency of a frequency converter in each water source well control unit is gradually reduced and the liquid level height in the water storage tank exceeds a liquid level height threshold value, the water consumption of the water injection well is reduced, the remote monitoring host controls the water source well control unit corresponding to one water source well to stop working, one water source well is reduced to supply water to the water storage tank, the check valve blocks the backflow of liquid, and the pipe from the check valve to the tail end of the limiting pipe is filled with water; and when the working frequency of the frequency converter in each water source well control unit is gradually increased and the liquid level height in the water storage tank is lower than the liquid level height threshold value, indicating that the water consumption of the water injection well is increased or the water source well working in the step two is in fault, and executing the step two.
The linkage control method for the oil field water source well and the water supply and injection station is characterized by comprising the following steps: the water storage tank liquid level meter is a drop-in type liquid level meter.
The linkage control method for the oil field water source well and the water supply and injection station is characterized by comprising the following steps: rain-proof cap is installed at the top of water source well switch board, lower margin support is installed to the bottom of water source well switch board.
The linkage control method for the oil field water source well and the water supply and injection station is characterized by comprising the following steps: the distance between the check valve and the emptying pipe is not more than 20 cm.
The linkage control method for the oil field water source well and the water supply and injection station is characterized by comprising the following steps: and a manual switch is arranged on one side, close to the connecting water pipe, of the emptying electromagnetic valve on the emptying pipe.
The linkage control method for the oil field water source well and the water supply and injection station is characterized by comprising the following steps: the remote monitoring host is an SCADA remote monitoring system, and the water supply station microcontroller and the water source well controller are PLC control modules.
The linkage control method for the oil field water source well and the water supply and injection station is characterized by comprising the following steps: the water supply and injection station communication module and the water source well communication module are both optical fiber communication modules, and the optical fiber communication modules are communicated with the SCADA remote monitoring system through optical fibers.
The linkage control method for the oil field water source well and the water supply and injection station is characterized by comprising the following steps: and a water storage tank water outlet pipe for injecting water into the water injection well is arranged at the bottom of the water storage tank.
Compared with the prior art, the invention has the following advantages:
1. the invention uses the air-release electromagnetic valve on the air-release pipe to discharge the air in the water source well water-leading pipe and the connecting water pipe in advance, avoids the problems that the water source well mouth has larger back pressure and the electric submersible pump cannot be started due to overlarge starting current when the electric submersible pump is started, adopts the frequency converter to control the electric submersible pump, saves electricity and energy, simultaneously fills water in the pipe from the check valve to the tail end of the limiting pipe to squeeze the air in the pipe from the check valve to the tail end of the limiting pipe before each water source well control unit works, reduces the driving pressure of the electric submersible pump, has low power consumption, is obliquely arranged in the connecting water pipe and the limiting pipe, one end of the limiting pipe close to the water inlet pipe of the water storage tank is higher than one end of the water pipe connected with the connecting water pipe, one end of the water pipe connected with the connecting water pipe is higher than one end of the connecting water pipe connected with the water source well water, the intraductal air of squeezing connection water pipe and raceway reduces the intraductal pressure of whole pipeline, the back is shut down to the check valve prevention electric submersible pump simultaneously, liquid backward flow in the water pipe, only need make in advance when first using check valve to spacing terminal intraductal full water of pipe when every water source well control unit, when every water source well control unit uses once more, the check valve effectively blocks the intraductal water reflux of check valve to spacing terminal when the shut down of previous time, and is high-efficient stable, convenient to popularize and use.
2. The invention utilizes the three-phase electric parameter acquisition module to detect the fault of the electric submersible pump, realizes nine protection functions of starting, clamping, dry pumping, overload, phase loss, short circuit, undervoltage, overvoltage and unloading of the electric submersible pump, and has the advantages of reliability, stability and good use effect.
3. The method has simple steps, the water source wells are started one by one to supply water to the water storage tank until the liquid level height in the water storage tank is maintained within the liquid level height threshold range, the liquid level change of the water storage tank is monitored in real time, the water supply of the water source wells is increased and decreased, the water source well control units work in a linkage and cooperation mode according to the water level in the water storage tank, when the water supply of the water storage tank is insufficient, a new water source well control unit is automatically started to supply water, the problems that well repair site supervision is not in place, the water source well control and communication equipment cannot supply water to the water injection wells after well repair operation is damaged are solved, the efficiency is high, the electric submersible pump is started and operated through the frequency converter each time.
In conclusion, the invention uses the emptying electromagnetic valve on the emptying pipe to discharge the air in the pipe in advance, thereby avoiding the problems that the electric submersible pump cannot be started due to the fact that the well mouth of the water source well has large back pressure and the starting current is too large when the electric submersible pump is started.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view showing the structural connection relationship among a water source well, a water source well control unit, a water storage tank and a control terminal of a water injection station according to the present invention.
Fig. 2 is an enlarged view of fig. 1 at a.
Fig. 3 is a schematic block diagram of the circuit connection of the water source well control unit, the remote monitoring host and the water injection station control terminal of the invention.
Fig. 4 is a schematic block diagram of the electrical circuit of the source well control unit of the present invention.
FIG. 5 is a block flow diagram of a method of the present invention.
Description of reference numerals:
1-remote monitoring host computer; 2, supplying water injection station control terminal;
2-1-supply water injection station microcontroller; 2-a water storage tank liquid level meter;
2-3-water injection station communication module; 3-source well control unit;
4-source well controller; 5-an electrical switch; 6-frequency converter;
7-an electric submersible pump; 8-current transformer; 9-a voltage transformer;
10-a temperature sensor; 11-a three-phase electric power acquisition module;
12-a pressure sensor; 13-an electromagnetic flow meter;
14-emptying the electromagnetic valve; 15-a light sensitive sensor;
16-a water flow sensor; 17-a source well communication module; 18-a water storage tank;
19-water inlet pipe of water storage tank; 20-water outlet pipe of water storage tank; 21-a water source well;
22-water source well water conduit; 23-connecting a water pipe; 24-a water conveying pipe;
25-source well control cabinet; 26-rain hat; 27-a foot margin bracket;
28-a blow-down pipe; 29-manual switch; 30-a check valve;
31-a power supply; 32, a limiting pipe.
Detailed Description
As shown in fig. 1 to 5, according to the linkage control method of the oil field water source well and the water supply station, a water source well control unit 3 for controlling water output of a corresponding water source well 21 is arranged outside the water source well, the water supply station comprises a water storage tank 18 and a water supply station control terminal 2 for monitoring liquid level change of the water storage tank 18, the number of the water source well control units 3 is equal to that of the water source wells 21 and corresponds to that of the water source wells one by one, the water supply station control terminal 2 and the water source well control unit 3 are both communicated with a remote monitoring host 1, the water supply station control terminal 2 comprises a water supply station microcontroller 2-1 and a water supply station communication module 2-3 connected with the water supply station microcontroller 2-1 and communicated with the remote monitoring host 1, a water storage tank liquid level meter 2-2 is arranged inside the water storage tank 18, and a signal output end of the water storage tank liquid level meter 2-2 is connected with a signal input end of the water supply station microcontroller 2-1 (ii) a
The water source well control unit 3 comprises a water source well control cabinet 25 arranged beside a water source well 21, a water source well controller 4 and a frequency converter 6, wherein the water source well controller 4 and the frequency converter 6 are arranged in the water source well control cabinet 25 respectively, the frequency converter is used for controlling the operation of an electric submersible pump 7 in a frequency conversion mode, the water source well controller 4 is connected with a water source well communication module 17 communicated with a remote monitoring host 1, a current transformer 8, a voltage transformer 9 and a temperature sensor 10 are used for acquiring the operating parameters of the electric submersible pump 7, the current transformer 8, the voltage transformer 9 and the temperature sensor 10 are all connected with the water source well controller 4 through a three-phase electric parameter acquisition module 11, the electric submersible pump 7 is arranged in the water source well 21, the output end of the electric submersible pump 7 is communicated with a connecting water pipe 23 on the ground through a water source well water guide pipe 22, the connecting water pipe 23 is communicated with a water storage tank water inlet pipe 19 through a water pipe 24 and a limiting pipe 32 in sequence, a pressure sensor 12 is arranged, the connecting water pipe 23 and the limiting pipe 32 are both obliquely arranged, one end of the limiting pipe 32 close to the water inlet pipe 19 of the water storage tank is higher than one end of the water pipe 24 connected with the connecting water pipe 23, one end of the water pipe 24 connected with the connecting water pipe 23 is higher than one end of the connecting water pipe 23 connected with the water source well water guide pipe 22, a check valve 30 is mounted on the connecting water pipe 23, an emptying pipe 28 is arranged on one side, close to the water source well water guide pipe 22, of the check valve 30 on the connecting water pipe 23, an electromagnetic flowmeter 13 is mounted on one side, far away from the water source well water guide pipe 22, of the check valve 30 on the connecting water pipe 23, an emptying electromagnetic valve 14 is mounted on the emptying pipe 28, and a water flow sensor 16 is arranged on one end;
the pressure sensor 12, the electromagnetic flowmeter 13 and the water flow sensor 16 are all connected with the water source well controller 4, and the emptying electromagnetic valve 14 is controlled by the water source well controller 4;
the method comprises the following steps:
step one, starting a first water source well to supply water for a water storage tank, and the process is as follows:
step 101, the remote monitoring host 1 controls a water source well control unit 3 corresponding to a first water source well to work, and before the water source well control unit 3 works, water is filled in a pipe from a check valve 30 to the tail end of a limiting pipe 32 in advance;
the water source well controller 4 firstly controls the emptying electromagnetic valve 14 to be opened, after the photosensitive sensor 15 senses external light, the water source well controller 4 then controls the electric switch 5 to be closed, the frequency converter 6 is started and drives the electric submersible pump 7 to work according to the liquid level height in the water storage tank 18, and when the water flow sensor 16 detects that water flows through, the water source well controller 4 controls the emptying electromagnetic valve 14 to be closed;
the photosensitive sensor 15 is arranged on the emptying pipe 28 and is positioned on the pipe wall of the emptying electromagnetic valve 14 close to the connecting water pipe 23, and the electric switch 5 is arranged on a power supply line between the frequency converter 6 and the power supply 31;
102, acquiring working parameters of an electric submersible pump 7 by using a current transformer 8, a voltage transformer 9 and a temperature sensor 10, transmitting the working parameters to a three-phase electric parameter acquisition module 11 for processing, controlling an electric switch 5 to be closed by a water source well controller 4 when the electric submersible pump 7 has a fault, stopping the electric submersible pump 7 from working, controlling a water source well control unit 3 corresponding to the other water source well to work by using a remote monitoring host 1, regarding the other water source well as a first water source well, and executing a step 101; when the working parameters of the electric submersible pump 7 are normal, executing step 103;
103, adjusting the output frequency by the frequency converter 6 according to the liquid level height in the water storage tank 18, and supplying water to the water storage tank 18 by using the first water source well when the liquid level height in the water storage tank 18 is maintained within the liquid level height threshold range; when the water supply amount of the water storage tank 18 is less than the water output amount, executing the step two;
step two, adding a water source well to supply water for the water storage tank, wherein the process is as follows:
step 201, the remote monitoring host 1 controls the added water source well control unit 3 corresponding to the water source well to work, and before the water source well control unit 3 works, the pipes from the check valve 30 to the tail end of the limiting pipe 32 are filled with water in advance;
the water source well controller 4 firstly controls the emptying electromagnetic valve 14 to be opened, after the photosensitive sensor 15 senses external light, the water source well controller 4 then controls the electric switch 5 to be closed, the frequency converter 6 is started and drives the electric submersible pump 7 to work according to the liquid level height in the water storage tank 18, and when the water flow sensor 16 detects that water flows through, the water source well controller 4 controls the emptying electromagnetic valve 14 to be closed;
step 202, acquiring working parameters of an electric submersible pump 7 by using a current transformer 8, a voltage transformer 9 and a temperature sensor 10, transmitting the working parameters to a three-phase parameter acquisition module 11 for processing, controlling an electric switch 5 to be closed by using a water source well controller 4 when the electric submersible pump 7 has a fault, stopping the electric submersible pump 7 from working, controlling a water source well control unit 3 corresponding to another water source well which does not work by using a remote monitoring host 1 to work, regarding the other water source well which does not work as an added water source well, and executing step 201; when the working parameters of the electric submersible pump 7 are normal, executing step 203;
step 203, the frequency converter 6 adjusts the output frequency according to the liquid level height in the water storage tank 18, and when the liquid level height in the water storage tank 18 is maintained within the liquid level height threshold range, the first water source well and the added water source wells are used for supplying water for the water storage tank 18 together; when the water supply amount of the water storage tank 18 is smaller than the water output amount, the step two is circulated until the liquid level height in the water storage tank 18 is maintained within the liquid level height threshold range;
step three, monitoring the liquid level change of the water storage tank in real time to increase or decrease the water supply of the water source well: when the working frequency of the frequency converter 6 in each water source well control unit 3 is gradually reduced and the liquid level height in the water storage tank 18 exceeds a liquid level height threshold value, the water consumption of the water injection well is reduced, the remote monitoring host 1 controls the water source well control unit 3 corresponding to one water source well to stop working, one water source well is reduced to supply water to the water storage tank 18, the check valve 30 blocks the backflow of the liquid, and the pipes from the check valve 30 to the tail end of the limiting pipe 32 are filled with water; and when the working frequency of the frequency converter 6 in each water source well control unit 3 is gradually increased and the liquid level height in the water storage tank 18 is lower than the liquid level height threshold value, indicating that the water consumption of the water injection well is increased or the water source well working in the step two is in fault, and executing the step two.
It should be noted that each electric submersible pump 7 is in a working or shutdown state, so that each electric submersible pump 7 needs to be started or stopped unnecessarily, the water source well 21 is generally a deep well, the wellhead back pressure of the deep well is large, the length of the water pipe of the water source well at a remote position is long, the air quantity in the pipe is large, when the electric submersible pump 7 is started, the back pressure of the wellhead of the deep well and the air pressure in the pipe need to be considered, the starting current is too large, the problem that the electric submersible pump 7 cannot be started or is easily burnt is solved, the air in the pipe of the water source well water pipe 22 and the pipe connecting water pipe 23 is discharged in advance by using the emptying electromagnetic valve 14 on the emptying pipe 28, the problem that the water source well wellhead back pressure is large, the starting current is too large when the electric submersible pump 7 is started, the electric submersible pump 7 cannot be started is avoided, the frequency converter 6 is used for controlling the electric submersible pump 7, the electricity and energy are saved, and the check valves 30 and the water pipes at the tail ends of the limit pipes The air in the tube at the tail end of the limiting tube 32 reduces the driving pressure of the electric submersible pump 7, and the power consumption is low; the connecting water pipe 23 and the limiting pipe 32 are both obliquely arranged, one end of the limiting pipe 32 close to the water inlet pipe 19 of the water storage tank is higher than one end of the water pipe 24 connected with the connecting water pipe 23, one end of the water pipe 24 connected with the connecting water pipe 23 is higher than one end of the water pipe 23 connected with the water source well water guide pipe 22, water flow is accumulated by utilizing the cooperation of the oblique connecting water pipe 23 and the check valve 30, air in the pipe connecting the water pipe 23 and the water pipe 24 is squeezed, the pipe pressure of the whole pipeline is reduced, meanwhile, the check valve 30 prevents liquid in the water pipe from flowing back after the electric submersible pump 7 is shut down, each water source well control unit 3 needs to be filled with water in the pipe from the check valve 30 to the tail end of the limiting pipe 32 in advance when being used for the first time, when each water source well control unit 3 is used again, the check valve 30 effectively blocks the backflow of the water in the pipe from the, the use effect is good, and the purpose of installing the photosensitive sensor 15 on the pipe wall of the emptying pipe 28 between the emptying electromagnetic valve 14 and the manual switch 29 is to ensure that the emptying electromagnetic valve 14 is opened so as to start the electric submersible pump 7 and avoid the electric submersible pump 7 from being started with air.
The three-phase electric parameter acquisition module 11 is used for detecting the fault of the electric submersible pump 7, so that nine protection functions of starting, blocking, dry pumping, overload, phase loss, short circuit, undervoltage, overvoltage and unloading of the electric submersible pump 7 are realized; the multiple water source well control units 3 work cooperatively in a linkage manner according to the water level in the water storage tank 18, when the water storage tank 18 supplies insufficient water, a new water source well control unit 3 is automatically started to supply water, the problems that well repair site supervision is not in place, and the water supply of a water injection well is not supplied after the water source well control and communication equipment are damaged by well repair operation are solved, the efficiency is high, the electric submersible pump 7 is started and operated through the frequency converter 6 every time, and the failure rate is low; pressure sensor 12 gathers the water pressure that corresponds source well 21, the source well water supply quality of work is looked over in real time to the staff of being convenient for, electromagnetic flowmeter 13 gathers the water supply that corresponds source well 21 to water storage tank 18, because electromagnetic flowmeter 13 installs and stops one side that check valve 30 kept away from source well water pipe 22 on connecting pipe 23, and connect pipe 23 and stop one side intraductal full water that check valve 30 kept away from source well water pipe 22, it is little to guarantee that electromagnetic flowmeter 13 gathers the water supply error that corresponds source well 21 to water storage tank 18, be convenient for calculate the daily cumulative amount of source well water supply.
In practical use, the three-phase electric power acquisition module 11 preferably adopts an SU306 three-phase electric power acquisition module, and the electric switch 5 preferably adopts an RXM2CB2BD DC24V relay.
In this embodiment, the water storage tank level gauge 2-2 is a drop-in level gauge, and can control the liquid level height threshold range at will according to the pressure and the water quantity of the water source well water, avoid adopting the conventional floating ball type level gauge to fix the liquid level height threshold range, effectively cooperate with the frequency converter 6, realize the frequency conversion control of the electric submersible pump 7, save power and save energy.
In this embodiment, rain-proof cap 26 is installed at the top of water source well switch board 25, lower margin support 27 is installed to the bottom of water source well switch board 25, and is anticorrosive rust-resistant.
In this embodiment, the distance between the check valve 30 and the emptying pipe 28 is not more than 20cm, so that after the emptying electromagnetic valve 14 is closed, pumped water is communicated with water limited by the check valve 30, and the electric submersible pump 7 is prevented from being started with air.
In this embodiment, a manual switch 29 is installed on the evacuation pipe 28 at a side of the evacuation solenoid valve 14 close to the connection water pipe 23.
It should be noted that, the purpose of installing the manual switch 29 on the evacuation pipe 28 on the side of the evacuation solenoid valve 14 close to the connection water pipe 23 is to prevent the water source well control unit 3 from being disabled after the evacuation solenoid valve 14 is damaged, and the water source well control unit 3 can be operated in a manual matching manner for use.
In this embodiment, the remote monitoring host 1 is an SCADA remote monitoring system, and the water supply station microcontroller 2-1 and the water source well controller 4 are both PLC control modules.
In this embodiment, the water supply and injection station communication modules 2 to 3 and the water source well communication module 17 are both optical fiber communication modules, and the optical fiber communication modules communicate with the SCADA remote monitoring system through optical fibers.
In this embodiment, a water outlet pipe 20 of the water storage tank for injecting water into the water injection well is arranged at the bottom of the water storage tank 18.
In actual use, the PLC control module preferably adopts an S7-200Smart S20PLC control module, the optical fiber communication module preferably adopts an RC512-FE-S-S1 optical fiber communication module, and meanwhile, the water source well control cabinet 25 is also provided with a 7062TX display screen and a buzzer which are connected with the water injection station microcontroller 2-1, so that digital display and alarm prompt of the water source well control cabinet 25 are realized, and the viewing by workers is facilitated.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. A linkage control method for an oil field water source well and a water supply station is characterized in that a water source well control unit (3) used for controlling water outlet of a corresponding water source well (21) is arranged outside the water source well, the water supply station comprises water storage tanks (18) and water supply station control terminals (2) used for monitoring liquid level changes of the water storage tanks (18), the number of the water source well control units (3) is equal to that of the water source wells (21) and corresponds to that of the water source wells one by one, the water supply station control terminals (2) and the water source well control units (3) are both communicated with a remote monitoring host (1), the water supply station control terminals (2) comprise water supply station microcontrollers (2-1) and water supply station communication modules (2-3) connected with the water supply station microcontrollers (2-1) and communicated with the remote monitoring host (1), water storage tank liquid level meters (2-2) are arranged in the water storage tanks (18), the signal output end of the water storage tank liquid level meter (2-2) is connected with the signal input end of the water injection station microcontroller (2-1);
the water source well control unit (3) comprises a water source well control cabinet (25) arranged beside a water source well (21), a water source well controller (4) arranged in the water source well control cabinet (25) and a frequency converter (6) for controlling the operation of an electric submersible pump (7) in a frequency conversion manner, the water source well controller (4) is connected with a water source well communication module (17) communicated with a remote monitoring host (1) and a current transformer (8), a voltage transformer (9) and a temperature sensor (10) for acquiring the working parameters of the electric submersible pump (7), the current transformer (8), the voltage transformer (9) and the temperature sensor (10) are all connected with the water source well controller (4) through a three-phase parameter acquisition module (11), the electric submersible pump (7) is arranged in the water source well (21), the output end of the electric submersible pump (7) is communicated with a connecting water pipe (23) on the ground through a water well water source pipe (22), the connecting water pipe (23) is communicated with the water storage tank inlet pipe (19) sequentially through the water conveying pipe (24) and the limiting pipe (32), the pipe section of the water source well inlet pipe (22) extending out of the water source well (21) is provided with the pressure sensor (12), the connecting water pipe (23) and the limiting pipe (32) are obliquely arranged, one end, close to the water storage tank inlet pipe (19), of the limiting pipe (32) is higher than one end, connected with the connecting water pipe (23), of the water conveying pipe (24), one end, connected with the connecting water pipe (23), of the water conveying pipe (24) is higher than one end, connected with the water source well inlet pipe (22), of the connecting water pipe (23), the check valve (30) is installed on the connecting water pipe (23), one side, close to the water source well inlet pipe (22), of the upper check valve (30) on the connecting water pipe (23) is provided with the upper stop pipe (28), one side, far away from the water source well inlet pipe (22), of the connecting water pipe (23) of the return valve (30), an emptying electromagnetic valve (14) is arranged on the emptying pipe (28), and a water flow sensor (16) is arranged at one end of the emptying pipe (28) close to the connecting water pipe (23);
the pressure sensor (12), the electromagnetic flowmeter (13) and the water flow sensor (16) are all connected with the water source well controller (4), and the emptying electromagnetic valve (14) is controlled by the water source well controller (4);
the method is characterized by comprising the following steps:
step one, starting a first water source well to supply water for a water storage tank, and the process is as follows:
101, a remote monitoring host (1) controls a water source well control unit (3) corresponding to a first water source well to work, and before the water source well control unit (3) works, water is filled in a pipe from a check valve (30) to the tail end of a limiting pipe (32);
the water source well controller (4) firstly controls the emptying electromagnetic valve (14) to be opened, after the photosensitive sensor (15) senses external light, the water source well controller (4) then controls the electric switch (5) to be closed, the frequency converter (6) is started and drives the electric submersible pump (7) to work according to the liquid level height in the water storage tank (18), and when the water flow sensor (16) detects that water flows through, the water source well controller (4) controls the emptying electromagnetic valve (14) to be closed;
the photosensitive sensor (15) is arranged on the emptying pipe (28) and is positioned on the pipe wall of the emptying electromagnetic valve (14) close to the connecting water pipe (23), and the electric switch (5) is arranged on a power supply circuit between the frequency converter (6) and the power supply (31);
102, acquiring working parameters of an electric submersible pump (7) by using a current transformer (8), a voltage transformer (9) and a temperature sensor (10), transmitting the working parameters to a three-phase parameter acquisition module (11) for processing, controlling an electric switch (5) to be closed by using a water source well controller (4) when the electric submersible pump (7) has a fault, stopping the electric submersible pump (7), controlling a water source well control unit (3) corresponding to the other water source well to work by using a remote monitoring host (1), regarding the other water source well as a first water source well, and executing a step 101; when the working parameters of the electric submersible pump (7) are normal, executing step 103;
103, adjusting the output frequency by the frequency converter (6) according to the liquid level height in the water storage tank (18), and supplying water to the water storage tank (18) by using the first water source well when the liquid level height in the water storage tank (18) is maintained within the liquid level height threshold range; when the water supply amount of the water storage tank (18) is less than the water output amount, executing a step two;
step two, adding a water source well to supply water for the water storage tank, wherein the process is as follows:
step 201, the remote monitoring host (1) controls the added water source well control unit (3) corresponding to the water source well to work, and before the water source well control unit (3) works, the water is filled in the pipe from the check valve (30) to the tail end of the limiting pipe (32);
the water source well controller (4) firstly controls the emptying electromagnetic valve (14) to be opened, after the photosensitive sensor (15) senses external light, the water source well controller (4) then controls the electric switch (5) to be closed, the frequency converter (6) is started and drives the electric submersible pump (7) to work according to the liquid level height in the water storage tank (18), and when the water flow sensor (16) detects that water flows through, the water source well controller (4) controls the emptying electromagnetic valve (14) to be closed;
202, acquiring working parameters of an electric submersible pump (7) by using a current transformer (8), a voltage transformer (9) and a temperature sensor (10), transmitting the working parameters to a three-phase parameter acquisition module (11) for processing, controlling an electric switch (5) to be closed by using a water source well controller (4) when the electric submersible pump (7) has a fault, stopping the electric submersible pump (7) from working, controlling a water source well control unit (3) corresponding to another unworked water source well to work by using a remote monitoring host (1), regarding the other unworked water source well as an added water source well, and executing step 201; when the working parameters of the electric submersible pump (7) are normal, executing step 203;
step 203, the frequency converter (6) adjusts output frequency according to the liquid level height in the water storage tank (18), and when the liquid level height in the water storage tank (18) is maintained within the liquid level height threshold range, a first water source well and an additional water source well are used for supplying water for the water storage tank (18) together; when the water supply amount of the water storage tank (18) is less than the water output amount, the second step is circulated until the liquid level height in the water storage tank (18) is maintained within the liquid level height threshold range;
step three, monitoring the liquid level change of the water storage tank in real time to increase or decrease the water supply of the water source well: when the working frequency of a frequency converter (6) in each water source well control unit (3) is gradually reduced and the liquid level height in a water storage tank (18) exceeds a liquid level height threshold value, the water consumption of a water injection well is reduced, a remote monitoring host (1) controls the water source well control unit (3) corresponding to one water source well to stop working, one water source well is reduced to supply water for the water storage tank (18), a check valve (30) blocks liquid backflow, and the water is filled in the pipe from the check valve (30) to the tail end of a limiting pipe (32); and when the working frequency of the frequency converter (6) in each water source well control unit (3) is gradually increased and the liquid level height in the water storage tank (18) is lower than the liquid level height threshold value, indicating that the water consumption of the water injection well is increased or the water source well working in the step two is in fault, and executing the step two.
2. The oil field water source well and water supply and injection station linkage control method according to claim 1, characterized in that: the water storage tank liquid level meter (2-2) is a drop-in type liquid level meter.
3. The oil field water source well and water supply and injection station linkage control method according to claim 1, characterized in that: rain-proof cap (26) are installed at the top of water source well switch board (25), lower margin support (27) are installed to the bottom of water source well switch board (25).
4. The oil field water source well and water supply and injection station linkage control method according to claim 1, characterized in that: the distance between the check valve (30) and the emptying pipe (28) is not more than 20 cm.
5. The oil field water source well and water supply and injection station linkage control method according to claim 1, characterized in that: and a manual switch (29) is arranged on one side, close to the connecting water pipe (23), of the emptying electromagnetic valve (14) on the emptying pipe (28).
6. The oil field water source well and water supply and injection station linkage control method according to claim 1, characterized in that: the remote monitoring host (1) is an SCADA remote monitoring system, and the water supply station microcontroller (2-1) and the water source well controller (4) are both PLC control modules.
7. The oil field water source well and water supply and injection station linkage control method according to claim 6, characterized in that: the water supply and injection station communication module (2-3) and the water source well communication module (17) are both optical fiber communication modules, and the optical fiber communication modules are communicated with the SCADA remote monitoring system through optical fibers.
8. The oil field water source well and water supply and injection station linkage control method according to claim 1, characterized in that: and a water storage tank outlet pipe (20) for injecting water into the water injection well is arranged at the bottom of the water storage tank (18).
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| CN1077004A (en) * | 1992-03-27 | 1993-10-06 | 北京市西城区新开通用试验厂 | Digital-control boosting metering distribution pump |
| CN1448612A (en) * | 2002-03-29 | 2003-10-15 | 中国石油天然气股份有限公司 | Gasified reactive water-cleaning well squeeze-adding expand-proof agent test charging process |
| CN100410542C (en) * | 2006-08-28 | 2008-08-13 | 吴九辅 | Dual control automatic water injection method for pump control and pump pressure flow |
| CN201061124Y (en) * | 2007-05-25 | 2008-05-14 | 东营汇安高科电子有限责任公司 | Intelligent terminal system of oil well |
| US9121270B2 (en) * | 2011-05-26 | 2015-09-01 | Grundfos Pumps Corporation | Pump system |
| CN204098885U (en) * | 2014-09-28 | 2015-01-14 | 株洲变流技术国家工程研究中心有限公司 | A kind of oil field flood pattern |
| CN106368656A (en) * | 2015-07-24 | 2017-02-01 | 中国石油化工股份有限公司 | Oilfield water injection system and oilfield water injection method |
| CN206655274U (en) * | 2017-03-29 | 2017-11-21 | 山东华星石油化工集团有限公司 | The outer draining recycle device of low pressure |
| CN208203247U (en) * | 2018-02-13 | 2018-12-07 | 新疆石油工程设计有限公司 | Integrated automatic well-selecting on-line proving water dispensing apparatus |
| CN209704866U (en) * | 2019-04-08 | 2019-11-29 | 中国石油化工股份有限公司西北油田分公司 | A kind of well head high pressure water-injection pump remote monitoring system |
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