CN-116517508-B - Plunger gas lift control system and method

CN116517508BCN 116517508 BCN116517508 BCN 116517508BCN-116517508-B

Abstract

The invention discloses a plunger gas lift control system and method, which relate to the technical field of automatic control design, wherein the system detects the plunger arrival state in real time through a plunger arrival sensor and outputs a level signal, a plunger gas lift controller obtains plunger operation parameter data according to the level signal, obtains actual plunger rising time according to the opening time of an electromagnetic valve and the output time of the level signal, generates a parameter regulating instruction according to plunger rising target time and the actual plunger rising time, acquires oil jacket pressure and flow information, generates a terminal instruction according to plunger operation parameter data, the parameter regulating instruction, the oil jacket pressure and the flow information, and the plunger gas lift controller adjusts the follow current time and/or the well closing time according to the terminal instruction, generates a control instruction after the follow current time and/or the well closing time is finished, and controls the on-off of the electromagnetic valve according to the control instruction.

Inventors

LIAO RUIQUAN
LI RUI
LEI YU
WANG WEI
FANG ZHIGANG
ZHANG MANLAI
CAI CHANGXIN
LUO WEI

Assignees

长江大学

Dates

Publication Date: 20260508
Application Date: 20230327

Claims (9)

1. The utility model provides a plunger gas lift control system, its characterized in that, plunger gas lift control system is connected with cloud ware, solenoid valve, the pressure sensor and the flow sensor of well head, pressure sensor is used for gathering the oil jacket pressure, flow sensor is used for gathering flow information, cloud ware is used for sending control command, plunger gas lift control system includes: the plunger arrival sensor is used for detecting the plunger arrival state in real time and outputting a level signal; The plunger gas lift controller is connected with the plunger arrival sensor, the pressure sensor, the flow sensor and the electromagnetic valve and used for controlling the opening of the electromagnetic valve to enable the plunger arrival sensor to detect the plunger arrival state in real time and output a level signal, obtaining plunger operation parameter data according to the level signal, obtaining actual plunger rising time according to the opening time of the electromagnetic valve and the output time of the level signal, generating a parameter regulating instruction according to plunger rising target time and the actual plunger rising time, acquiring oil jacket pressure and flow information, generating a terminal instruction according to the parameter regulating instruction, the plunger operation parameter data, the oil jacket pressure and the flow information, and adjusting the follow current time and/or the well closing time according to the terminal instruction by the plunger gas lift controller; The plunger gas lift controller includes: The signal conditioning circuit is connected with the plunger arrival sensor and is used for filtering and amplifying the level signal to obtain a square wave signal; The first TTL-485 conversion circuit is connected with the pressure sensor and the flow sensor and used for acquiring oil jacket pressure and flow information; The controller is connected with the signal conditioning circuit and the first TTL-to-485 circuit and is used for obtaining plunger operation parameter data according to square wave signals, controlling the opening of the electromagnetic valve to enable the plunger to reach the sensor to detect the plunger reaching state in real time and output level signals; The timer is connected with the plunger arrival sensor and the controller and is used for obtaining the actual plunger rising time according to the opening time of the electromagnetic valve and the output time of the level signal; the controller is also used for generating a parameter adjusting instruction according to the plunger rising target time and the actual plunger rising time; The second TTL-to-485 circuit is connected with the controller and used for acquiring the parameter adjusting instruction, the oil jacket pressure, the flow information and the plunger operation parameter data; The communication unit is connected with the second TTL-485 conversion circuit and the cloud server and used for transmitting the parameter adjusting instruction, the oil jacket pressure, the flow information and the plunger operation parameter data to the cloud server, the cloud server is used for generating a terminal instruction according to the parameter adjusting instruction, the plunger operation parameter data, the oil jacket pressure and the flow information, the communication unit is used for transmitting the terminal instruction sent by the cloud server to the controller through the second TTL-485 conversion circuit, the controller is also used for adjusting the follow current time and/or the well closing time according to the terminal instruction, the timer is used for generating a control instruction according to the follow current time and/or the well closing time, and the controller is used for generating an on-off instruction according to the control instruction; and the driving unit is connected with the controller and the electromagnetic valve and used for controlling the on-off of the electromagnetic valve according to the on-off instruction.
2. The ram gas lift control system of claim 1, wherein the ram gas lift controller further comprises: the input device is connected with the controller and is used for receiving working instructions input by workers; The controller is also used for adjusting the follow current time and/or the well closing time according to the working instruction, generating a control instruction when the follow current time and/or the well closing time is finished, controlling the on-off of the electromagnetic valve according to the control instruction, changing the working mode and the working parameters of the plunger gas lift well according to the working instruction, obtaining working data according to the working mode and the working parameters, the second TTL-to-485 circuit is used for receiving the working data, and the communication unit is used for transmitting the working data to the cloud server.
3. The ram gas lift control system of claim 2, wherein the ram gas lift controller further comprises: And the display is connected with the controller and used for displaying the working data, the oil jacket pressure, the flow information and the plunger operation parameter data in real time.
4. The plunger gas lift control system of claim 1, wherein the plunger gas lift control system further comprises: The power management unit is connected with the plunger gas lift controller and is used for distributing output voltage to the plunger gas lift controller; And the storage battery is connected with the power management unit and is used for supplying power to the power management unit.
5. The plunger gas lift control system of claim 4, further comprising: And the solar cell panel is connected with the storage battery and used for charging the storage battery.
6. The plunger gas lift control system of claim 1, wherein the controller is a master MCU.
7. The plunger gas lift control system of claim 1, wherein the communication unit is a 4G module circuit.
8. A plunger gas lift control method, characterized in that the plunger gas lift control method employs the plunger gas lift control system of any one of claims 1 to 7, the plunger gas lift control method comprising the steps of: Controlling the opening of the electromagnetic valve to enable the plunger to reach the sensor to detect the plunger reaching state in real time and output a level signal; Obtaining plunger operation parameter data according to the level signal; Obtaining the actual plunger rising time according to the opening time of the electromagnetic valve and the output time of the level signal; generating a parameter adjusting instruction according to the plunger rising target time and the actual plunger rising time; Adjusting the follow current time and/or the well closing time through a terminal instruction generated by a cloud server according to the parameter adjusting instruction, the plunger operating parameter data, the oil casing pressure and the flow information; And generating a control instruction after the follow current time and/or the well closing time is finished, and controlling the on-off of the electromagnetic valve according to the control instruction.
9. The plunger gas lift control method of claim 8, wherein generating the parameter tuning command according to the plunger rise target time and the actual plunger rise time comprises: Obtaining plunger lifting target time according to the well depth and the plunger lifting target speed; obtaining waiting arrival time according to the plunger rising target time; and judging the rising time and the waiting arrival time of the actual plunger to generate a parameter adjusting instruction.

Description

Plunger gas lift control system and method Technical Field The invention relates to the technical field of automatic control design, in particular to a plunger gas lift control system and a plunger gas lift control method. Background Plunger gas lift is a drainage gas production process used in the early stage of water breakthrough of a gas well. In the plunger gas lift drainage gas production technology, the plunger is used as a mechanical interface between gas and liquid, and the plunger is pushed to move up and down in an oil pipe in a circulating mode by means of the self energy of a gas well, so that periodic liquid lift is realized, liquid slipping and gas channeling can be effectively prevented, and intermittent lifting efficiency is improved. The plunger gas lift control system lacks of correct setting of system optimization parameters in the concrete application of oil fields, and is operated by depending on experience of workers on site, so that the plunger gas lift work efficiency is low, the system does not have a real-time diagnosis function, the investment of a data remote transmission system is large, and the operation and management cost is increased. Disclosure of Invention The invention aims to provide a plunger gas lift control system and method, which can monitor the working state of plunger gas lift in real time so as to control the plunger gas lift in real time. In order to achieve the above object, the present invention provides the following solutions: the utility model provides a plunger gas lift control system, plunger gas lift control system is connected with cloud ware, solenoid valve, wellhead's pressure sensor and flow sensor, pressure sensor is used for gathering the oil jacket pressure, flow sensor is used for gathering flow information, cloud ware is used for sending control command, plunger gas lift control system includes: the plunger arrival sensor is used for detecting the plunger arrival state in real time and outputting a level signal; The plunger gas lift controller is connected with the plunger arrival sensor, the pressure sensor, the flow sensor and the electromagnetic valve and used for controlling the opening of the electromagnetic valve to enable the plunger arrival sensor to detect the plunger arrival state in real time and output a level signal, obtaining plunger operation parameter data according to the level signal, obtaining actual plunger rising time according to the opening time of the electromagnetic valve and the output time of the level signal, generating a parameter regulating instruction according to plunger rising target time and the actual plunger rising time, acquiring oil jacket pressure and flow information, generating a terminal instruction according to the parameter regulating instruction, the plunger operation parameter data, the oil jacket pressure and the flow information, and adjusting the follow current time and/or the well closing time according to the terminal instruction. Optionally, the plunger gas lift controller includes: The signal conditioning circuit is connected with the plunger arrival sensor and is used for filtering and amplifying the level signal to obtain a square wave signal; The first TTL-485 conversion circuit is connected with the pressure sensor and the flow sensor and used for acquiring oil jacket pressure and flow information; The controller is connected with the signal conditioning circuit and the first TTL-to-485 circuit and is used for obtaining plunger operation parameter data according to square wave signals, controlling the opening of the electromagnetic valve to enable the plunger to reach the sensor to detect the plunger reaching state in real time and output level signals; The timer is connected with the plunger arrival sensor and the controller and is used for obtaining the actual plunger rising time according to the opening time of the electromagnetic valve and the output time of the level signal; the controller is also used for generating a parameter adjusting instruction according to the plunger rising target time and the actual plunger rising time; The second TTL-to-485 circuit is connected with the controller and used for acquiring the parameter adjusting instruction, the oil jacket pressure, the flow information and the plunger operation parameter data; The communication unit is connected with the second TTL-485 conversion circuit and the cloud server and used for transmitting the parameter adjusting instruction, the oil jacket pressure, the flow information and the plunger operation parameter data to the cloud server, the cloud server is used for generating a terminal instruction according to the parameter adjusting instruction, the plunger operation parameter data, the oil jacket pressure and the flow information, the communication unit is used for transmitting the terminal instruction sent by the cloud server to the controller through the second TTL-485 conversion circuit, the controller is also use