A control system for fracturing low pressure water supply

Abstract

The present application belongs to the technical field of petroleum engineering, and specifically discloses a control system for fracturing low-pressure water supply. The system comprises a data acquisition module, a valve control module, a data communication module, a real-time monitoring module, an intelligent control module, a data storage and analysis module, and a user interface and remote operation module. The valve control module controls the throttle valve according to the data collected by the data acquisition module. The collected data and the valve opening data of the valve control module are transmitted to the intelligent control module, the data storage and analysis module, and the user interface and remote operation module through the data communication module and the real-time monitoring module. The intelligent control module generates control data and feeds it back to the valve control module to control the throttle valve. The present application can realize real-time monitoring and dynamic adjustment of pressure and flow during low-pressure water supply, ensuring efficient and stable operation of the water supply system during fracturing operations. The present application can be widely applied to the control of drilling low-pressure water supply systems.

Description

Technical Field

[0001] This invention belongs to the field of petroleum engineering technology, and specifically relates to a control system for low-pressure water supply in fracturing. Background Technology

[0002] In petroleum engineering, fracturing technology is widely used to improve the productivity of oil wells. The fracturing operation relies on a low-pressure water supply system to inject large quantities of low-pressure fracturing fluid into specific rock formations after pressurization in the manifold, thereby fracturing the rock and releasing the buried oil.

[0003] Existing low-pressure water supply systems suffer from the following problems in practical applications: 1. Unstable flow rate: When faced with high flow rate demands, existing low-pressure water supply systems often struggle to maintain a stable flow rate. This instability directly affects the fracturing operation, leading to uneven fracturing or reduced efficiency. 2. Large pressure fluctuations: Pressure fluctuations can cause uneven fluid flow during fracturing operations, affecting the fracturing effect and potentially damaging equipment. 3. Delayed control: Existing low-pressure water supply systems rely on manual control and lack the ability to monitor and dynamically adjust pressure and flow rate in real time. Due to the lack of precise control methods, excessive flow may lead to waste of fracturing fluid, while insufficient flow may affect the fracturing effect. 4. Complex maintenance and operation: Existing low-pressure water supply systems often require frequent manual inspection and adjustment, which is complex, time-consuming, labor-intensive, costly, and difficult to maintain. Summary of the Invention

[0004] The purpose of this invention is to provide a control system for low-pressure water supply in fracturing, which can realize real-time monitoring and dynamic adjustment of pressure and flow rate during low-pressure water supply, ensuring the efficient and stable operation of the water supply system in fracturing operations.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows:

[0006] A control system for low-pressure water supply in fracturing, the system comprising: a data acquisition module, a valve control module, a data communication module, a real-time monitoring module, an intelligent control module, a data storage and analysis module, and a user interface and remote operation module;

[0007] The data acquisition module collects pressure data and inflow / outflow data from the water supply tank, generates collected data, and sends the collected data to the valve control module and the data communication module respectively.

[0008] The valve control module receives and responds to the acquired data transmitted by the data acquisition module, controls the opening degree of the regulating valve, and transmits the valve opening degree data to the data communication module; on the other hand, it receives and responds to the control data transmitted by the data communication module, controls the opening degree of the regulating valve, and transmits the valve opening degree data to the data communication module.

[0009] The data communication module receives the acquired data from the data acquisition module and the valve opening data from the valve control module, and transmits the acquired data and valve opening data to the real-time monitoring module. On the other hand, it receives the control data from the intelligent control module and transmits the control data to the valve control module.

[0010] The real-time monitoring module receives and displays the collected data and valve opening data transmitted by the data communication module, and sends the collected data and valve opening data to the intelligent control module, data storage and analysis module, and user interface and remote operation module;

[0011] The user interface and remote operation module receive and display the collected data and valve opening data sent by the real-time monitoring module; on the other hand, it adjusts the pressure, flow rate and valve opening, generates adjustment data and transmits it to the intelligent control module.

[0012] The data storage and analysis module receives and stores the collected data and valve opening data sent by the real-time monitoring module. After analyzing the collected data and valve opening data, it generates analysis data and transmits it to the intelligent control module.

[0013] The intelligent control module receives and responds to the collected data and valve opening data transmitted by the data communication module, the adjustment data transmitted by the user interface and remote operation module, and the analysis data transmitted by the data storage and analysis module. It analyzes the operation of the water supply system, generates control data, and transmits the control data to the data communication module.

[0014] As a limitation, the data acquisition module includes at least one pressure sensor installed at the inlet of the manifold for real-time detection of the pressure inside the water supply tank, and at least two flow sensors installed at the inlet and outlet of the manifold for measuring the flow rate of the incoming and outgoing water.

[0015] As a second limitation, the valve control module includes a controller and at least one regulating valve installed in the manifold to regulate the flow rate and pressure of water;

[0016] The controller receives and responds to the acquired data transmitted by the data acquisition module, and uses a model predictive control algorithm to calculate the optimal opening degree of the regulating valve in real time, thereby controlling the regulating valve.

[0017] As a further limitation, the formula for calculating the optimal opening degree of the regulating valve is:

[0018]

[0019] In the formula, u k For calculating the opening degree of the control valve, P i and F i P represents the predicted pressure and predicted flow rate at step i, respectively. target and F target These are the target values ​​for pressure and flow rate, respectively, with ω1 and ω2 being weighting coefficients.

[0020] As a further limitation, the interval between the data acquisition module transmitting the acquired data to the controller is on the order of milliseconds.

[0021] As a third limitation, the user interface and remote operation module transmit data to the user's control terminal via the Internet of Things.

[0022] As a fourth limitation, the data communication module uses Ethernet, WIFI, or industrial bus communication protocols to implement data transmission.

[0023] As a fifth limitation, the intelligent control module has a preset backup control strategy. When the received acquisition data and valve opening data reach the set value, the intelligent control module transmits the preset control data in the backup control strategy to the data communication module.

[0024] The present invention, by adopting the above-described technical solution, achieves the following technical advancements compared to existing technologies:

[0025] (1) This invention can automatically monitor and dynamically adjust the pressure and flow rate in real time during low-pressure water supply by using data feedback from pressure sensor and flow sensor. It is easy to operate and ensures the efficient and stable operation of the water supply system in fracturing operations.

[0026] (2) In this invention, the pressure sensor and flow sensor transmit data to the controller in milliseconds, which greatly improves the response speed of the system.

[0027] (3) The data communication module in this invention can use a variety of communication protocols when transmitting data, which improves the universality of this invention and the stability of data transmission between modules;

[0028] (4) In this invention, the user interface and remote operation module transmit data to the user's control terminal through the Internet of Things, allowing the user to perform remote monitoring and operation, which improves the system's operational flexibility and convenience;

[0029] (5) The present invention adds a data storage and analysis module, which can record key parameter information in the water supply process, facilitate subsequent data analysis, continuously improve the system's adaptive capability, and enable the water supply system to maintain an efficient and stable operating state under various complex working conditions.

[0030] (6) The intelligent control module of the present invention has a backup control strategy, which can cope with sudden situations or abnormal events and ensure the continuous and stable operation of fracturing.

[0031] This invention belongs to the field of petroleum engineering technology and can automatically realize real-time monitoring and dynamic adjustment of pressure and flow during low-pressure water supply, ensuring the efficient and stable operation of the water supply system in fracturing operations. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0033] In the attached diagram:

[0034] Figure 1 This is a system structure block diagram of Embodiment 1 of the present invention;

[0035] Figure 2 This is a schematic diagram of data transmission for collecting data and valve opening data in Embodiment 1 of the present invention;

[0036] Figure 3 This is a schematic diagram of data transmission for adjusting data, analyzing data, and controlling data in Embodiment 1 of the present invention. Detailed Implementation

[0037] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0038] Example 1: A control system for low-pressure water supply in fracturing

[0039] This embodiment describes a control system for low-pressure water supply in fracturing. The low-pressure water supply system in this embodiment has three inlets and one outlet in its manifold. The following will describe this in conjunction with... Figures 1 to 3 This embodiment will be described in detail.

[0040] like Figure 1 As shown, this embodiment includes: a data acquisition module, a valve control module, a data communication module, a real-time monitoring module, an intelligent control module, a data storage and analysis module, and a user interface and remote operation module.

[0041] The data acquisition module collects pressure data and inflow / outflow data from the water supply tank, forming the collected data, and then sends the collected data to the valve control module and the data communication module respectively.

[0042] The valve control module receives and responds to the acquired data transmitted by the data acquisition module, controls the opening degree of the regulating valve, and transmits the valve opening degree data to the data communication module. On the other hand, it receives and responds to the control data transmitted by the data communication module, controls the opening degree of the regulating valve, and transmits the valve opening degree data to the data communication module.

[0043] The data communication module uses Ethernet, WIFI, or industrial bus communication protocols to achieve data transmission. On the one hand, it receives the acquired data transmitted by the data acquisition module and the valve opening data transmitted by the valve control module, and transmits the acquired data and valve opening data to the real-time monitoring module. On the other hand, it receives the control data transmitted by the intelligent control module and transmits the control data to the valve control module.

[0044] The real-time monitoring module receives and displays the collected data and valve opening data transmitted by the data communication module, and sends the collected data and valve opening data to the intelligent control module, data storage and analysis module, and user interface and remote operation module.

[0045] The user interface and remote operation module connect to the user's PC, tablet, or mobile phone via the Internet of Things (IoT) to achieve data transmission. On one hand, it receives and displays the collected data and valve opening data sent by the real-time monitoring module; on the other hand, after the user adjusts the pressure, flow rate, and valve opening, the adjusted data is generated and transmitted to the intelligent control module.

[0046] The data storage and analysis module receives and stores the collected data and valve opening data sent by the real-time monitoring module. After analyzing the collected data and valve opening data, it generates analysis data and transmits it to the intelligent control module.

[0047] The intelligent control module receives and responds to the collected data and valve opening data transmitted by the data communication module, the adjustment data transmitted by the user interface and remote operation module, and the analysis data transmitted by the data storage and analysis module. It analyzes the water supply system's operation, generates control data, and transmits this control data to the data communication module. The intelligent control module has a preset backup control strategy. When the received collected data and valve opening data reach set values, the intelligent control module transmits the preset control data from the backup control strategy to the data communication module.

[0048] The data acquisition module includes three pressure sensors and four flow sensors. The three pressure sensors are installed at the three inlet positions of the manifold to monitor the pressure in the water supply tank in real time. The four flow sensors are installed at the three inlets and one outlet of the manifold to measure the flow rate of the incoming and outgoing water. Both the pressure and flow sensors transmit data to the valve control module and the data communication module with a response time in the millisecond range.

[0049] The valve control module includes a controller and three regulating valves installed in the manifold to adjust the flow rate and pressure of water. The controller is located on the manifold, receives and responds to the data acquired by the data acquisition module, compares the pressure and flow rate data in the acquired data with the set values, and controls the opening degree of the regulating valves.

[0050] like Figure 2 As shown, after the water supply begins, the pressure sensor and flow sensor in the data acquisition module immediately begin monitoring the pressure and flow in the pipeline. The acquired data is transmitted to the data communication module and valve control module at a frequency of milliseconds.

[0051] After receiving the collected data, the controller in the valve control module uses a model predictive control algorithm to calculate the optimal opening degree of the regulating valve in real time, thereby controlling the regulating valve and transmitting the valve opening degree data to the data communication module.

[0052] The formula for calculating the optimal opening degree of the control valve is as follows:

[0053]

[0054] In the formula, u k For calculating the opening degree of the control valve, P i and F i P represents the predicted pressure and predicted flow rate at step i, respectively. target and F target These are the target values ​​for pressure and flow rate, respectively, with ω1 and ω2 being weighting coefficients.

[0055] After receiving the collected data and valve opening data, the data communication module transmits them to the real-time monitoring module. The real-time monitoring module displays the received collected data and valve opening data, and then transmits the received collected data and valve opening data to the intelligent control module, the data storage and analysis module, and the user interface and remote operation module, respectively.

[0056] like Figure 3As shown, after receiving the collected data and valve opening data, the user interface and remote operation module will display these data in real time on the user's PC, tablet, or mobile phone. The user can view the system's current status and adjust parameters at any time. The user interface and remote operation module will then generate adjustment data and transmit it to the intelligent control module. After receiving the collected data and valve opening data, the data storage and analysis module will store the data, analyze it, and transmit the generated analysis data to the intelligent control module.

[0057] After receiving the collected data, valve opening data, adjustment data, and analysis data, the intelligent control module performs comprehensive analysis and prediction of the water supply system, generating control data which is then transmitted to the data communication module. If a system anomaly occurs, and the collected data and valve opening data received by the intelligent control module show abnormalities reaching the set target value, a preset backup control strategy will be activated, immediately transmitting the preset control data from the backup strategy to the data communication module. Upon receiving the control data from the intelligent control module, the data communication module transmits the control data to the valve control module, which then adjusts the valve opening of the throttle valve based on the control data.

[0058] It should be noted that this embodiment uses three pressure sensors and four flow sensors. The number of pressure sensors and flow sensors can be adjusted according to actual conditions, as long as they can meet the monitoring requirements of pressure and flow in the manifold.

[0059] In summary, this embodiment, through data feedback from pressure and flow sensors, can automatically monitor and dynamically adjust pressure and flow during low-pressure water supply in real time. It is easy to operate and ensures the efficient and stable operation of the water supply system in fracturing operations.

Claims

1. A control system for low-pressure water supply in fracturing operations, characterized in that, The system includes: a data acquisition module, a valve control module, a data communication module, a real-time monitoring module, an intelligent control module, a data storage and analysis module, and a user interface and remote operation module; The data acquisition module collects pressure data and inflow / outflow data from the water supply tank, generates collected data, and sends the collected data to the valve control module and the data communication module respectively. The valve control module receives and responds to the acquired data transmitted by the data acquisition module, controls the opening degree of the regulating valve, and transmits the valve opening degree data to the data communication module; on the other hand, it receives and responds to the control data transmitted by the data communication module, controls the opening degree of the regulating valve, and transmits the valve opening degree data to the data communication module. The data communication module receives the acquired data from the data acquisition module and the valve opening data from the valve control module, and transmits the acquired data and valve opening data to the real-time monitoring module. On the other hand, it receives the control data from the intelligent control module and transmits the control data to the valve control module. The real-time monitoring module receives and displays the collected data and valve opening data transmitted by the data communication module, and sends the collected data and valve opening data to the intelligent control module, data storage and analysis module, and user interface and remote operation module; The user interface and remote operation module receive and display the collected data and valve opening data sent by the real-time monitoring module; on the other hand, it adjusts the pressure, flow rate and valve opening, generates adjustment data and transmits it to the intelligent control module. The data storage and analysis module receives and stores the collected data and valve opening data sent by the real-time monitoring module. After analyzing the collected data and valve opening data, it generates analysis data and transmits it to the intelligent control module. The intelligent control module receives and responds to the collected data and valve opening data transmitted by the data communication module, the adjustment data transmitted by the user interface and remote operation module, and the analysis data transmitted by the data storage and analysis module. It analyzes the operation of the water supply system, generates control data, and transmits the control data to the data communication module.

2. The control system for low-pressure water supply in fracturing according to claim 1, characterized in that, The data acquisition module includes at least one pressure sensor installed at the inlet of the manifold for real-time detection of the pressure inside the water supply tank, and at least two flow sensors installed at the inlet and outlet of the manifold for measuring the flow rate of the incoming and outgoing water.

3. The control system for low-pressure water supply in fracturing according to claim 1, characterized in that, The valve control module includes a controller and at least one regulating valve installed in the manifold to regulate the flow rate and pressure of water. The controller receives and responds to the acquired data transmitted by the data acquisition module, and uses a model predictive control algorithm to calculate the optimal opening degree of the regulating valve in real time, thereby controlling the regulating valve.

4. A control system for low-pressure water supply in fracturing according to claim 3, characterized in that, The formula for calculating the optimal opening degree of the regulating valve is: In the formula, u k For calculating the opening degree of the control valve, P i and F i P represents the predicted pressure and predicted flow rate at step i, respectively. target and F target These are the target values ​​for pressure and flow rate, respectively, with ω1 and ω2 being weighting coefficients.

5. A control system for low-pressure water supply in fracturing according to claim 3, characterized in that, The data acquisition module transmits the acquired data to the controller at millisecond intervals.

6. A control system for low-pressure water supply in fracturing according to claim 1, characterized in that, The user interface and remote operation module transmit data with the user's control terminal via the Internet of Things.

7. A control system for low-pressure water supply in fracturing according to claim 1, characterized in that, The data communication module uses Ethernet, WIFI, or industrial bus communication protocols to achieve data transmission.

8. A control system for low-pressure water supply in fracturing according to claim 1, characterized in that, The intelligent control module has a preset backup control strategy. When the received data and valve opening data reach the set value, the intelligent control module transmits the preset control data in the backup control strategy to the data communication module.

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