High-power electric heating power adjusting system
By using a high-power electric heating power regulation system in deep reservoir mining, the downhole steam dryness value is accurately controlled, which solves the problem of too low steam dryness value in deep reservoir mining, reducing mining costs and improving economic benefits.
Patent Information
- Application Number
- CN202311458808.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-03
- Publication Date
- 2025-05-06
AI Technical Summary
During the mining of deep reservoirs, the dryness of the underground steam is too low to meet the mining needs. At the same time, the heating cost is high with high heat exchange efficiency, resulting in an increase in mining costs.
A high-power electric heating power regulation system is adopted, including a power regulation device, an underground electric heater, a control system and a dryness sensor. The steam dryness value is obtained through the dryness sensor, the control system analyzes the requirements and actual values, and the power regulation device controls the heating power of the downhole electric heater according to the instructions.
It realizes accurate control of the dryness value of downhole steam, reduces reservoir mining costs, and improves the overall economic benefits of the system.
Smart Images
Figure CN119933629A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of power control, and in particular relates to a high-power electric heating power regulation system. Background Art
[0002] During the steam injection process, as the well depth increases and the heat loss of the wellbore increases, the steam quality value of the well will drop sharply. If the steam quality value of the well is too low, it will not meet the production needs of some deep oil reservoirs. Therefore, a system that can effectively control the steam quality value of the well is needed. Summary of the invention
[0003] The purpose of the present invention is to provide a high-power electric heating power regulation system, which can realize accurate control of the steam dryness value in the well, and at the same time, reduce the exploitation cost of the oil reservoir and improve the overall economic benefits of the system.
[0004] Specifically, the present invention adopts the following technical solutions:
[0005] The present invention provides a high-power electric heating power regulation system, characterized in that the system comprises a power regulation device, a downhole electric heater, a control system and a dryness sensor; the power regulation device is connected to the downhole electric heater via a cable, and the power regulation device is connected to the control system via an optical fiber, and the power regulation device is used to control the heating power of the downhole electric heater; the control system is connected to the power regulation device and the dryness sensor via an optical fiber, and the control system is used to control the output power of the power regulation device and monitor the steam dryness value obtained by the dryness sensor; the downhole electric heater is connected to the power regulation device via a cable, and the downhole electric heater is used to control the steam dryness value downhole; the dryness sensor is connected to the control system via an optical fiber, and the dryness sensor is used to obtain the steam dryness value downhole.
[0006] Furthermore, the power regulation device also includes a main control cabinet, which is connected to the power unit cabinet via optical fiber, and the main control cabinet is connected to the human-machine interface via a port. The main control cabinet is used to detect the input voltage and current and output voltage and current of the power regulation device, and is used to control the power unit cabinet and the human-machine interface.
[0007] Furthermore, the power regulating device also includes a human-machine interface, which is connected to the main control cabinet through a port. The human-machine interface is used to provide real-time feedback on various states and parameters of the power regulating device and to set various functions of the power regulating device.
[0008] Furthermore, the power regulation device also includes a power unit cabinet, which is connected to the main control cabinet via an optical fiber, and the power unit cabinet is used to obtain an AC voltage with adjustable frequency and voltage.
[0009] Furthermore, the power regulating device also includes a filter cabinet, which is connected to the power unit cabinet, and the filter cabinet is used to control the waveform corresponding to the output voltage of the power regulating device.
[0010] Furthermore, the power regulation device also includes a phase-shifting transformer, which is connected to the power unit cabinet and is used to control the phase of the input voltage and increase or decrease the input voltage.
[0011] Furthermore, the power unit cabinet also includes a rectifier module, and the rectifier module is used to convert alternating current into direct current.
[0012] Furthermore, the power unit cabinet also includes an inverter module, and the inverter module is used to convert direct current into alternating current.
[0013] Furthermore, the power unit cabinet also includes a unit bypass module, and the unit bypass module is used to control the conduction of the voltage in the power unit cabinet.
[0014] Furthermore, the system also includes a power supply device, which is used to supply power to the components in the high-power electric heating power regulation system.
[0015] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:
[0016] In the present invention, first, the steam dryness value in the steam injection well is obtained through a dryness sensor. Then, the obtained steam dryness value is transmitted to the control system through optical fiber transmission. Since the steam dryness value requirements at different depths are inconsistent, the control system analyzes the requirements for different steam dryness values and the obtained steam dryness value in the well to determine the heating power corresponding to different depths. Based on this, the control system transmits the output power control instruction obtained from the analysis to the power regulation device. In response to the above control instruction, the power regulation device controls the downhole heater to heat according to the output power in the instruction, thereby realizing accurate control of the downhole steam dryness value.
[0017] In summary, the present invention can achieve accurate control of the downhole steam quality value, while reducing the production cost of the oil reservoir and improving the overall economic benefits of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0019] Figure 1 The structural schematic diagram of the high-power electric heating power regulation system of the present invention is shown;
[0020] Figure 2 The schematic diagram of the structure of the power regulating device of the present invention is shown.
[0021] The following are the descriptions of the reference numerals:
[0022] 100—High-power electric heating power regulation system 101—Power regulation device 102—Downhole electric heater
[0023] 103—Control system 104—Dryness sensor 105—Main control cabinet
[0024] 106—Human-machine interface 107—Power unit cabinet 108—Filter cabinet
[0025] 109—Phase-shifting transformer 110—Power supply device DETAILED DESCRIPTION
[0026] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.
[0027] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] Reference Figure 1 , which shows a schematic diagram of the structure of the high-power electric heating power regulation system of the present invention. Figure 2 , shows a schematic structural diagram of the power regulating device of the present invention.
[0030] The present invention provides a high-power electric heating power regulation system, which is mainly used to achieve accurate control of underground steam dryness value, while reducing the exploitation cost of the oil reservoir and improving the overall economic benefits of the system.
[0031] Specifically, the high-power electric heating power regulation system 100 includes a power regulation device 101, a downhole electric heater 102, a control system 103 and a dryness sensor 104; the power regulation device 101 is connected to the downhole electric heater 102 via a cable, and the power regulation device 101 is connected to the control system 103 via an optical fiber, and the power regulation device 101 is used to control the heating power of the downhole electric heater 102; the control system 103 is connected to the power regulation device 101 and the dryness sensor 104 via an optical fiber, and the control system 103 is used to control the output power of the power regulation device 101, and monitor the steam dryness value obtained by the dryness sensor 104; the downhole electric heater 102 is connected to the power regulation device 101 via a cable, and the downhole electric heater 102 is used to control the steam dryness value downhole; the dryness sensor 104 is connected to the control system 103 via an optical fiber, and the dryness sensor 104 is used to obtain the steam dryness value downhole.
[0032] In the process of steam injection in existing steam injection wells, as the depth of the steam injection well increases, the steam quality value of the steam in the steam injection well will gradually decrease. When the steam quality value in the steam injection well is too low, it cannot meet the requirements of heavy oil production in the set deep layer.
[0033] Therefore, the present application provides a high-power electric heating power regulation system 100 including a power regulation device 101, a downhole electric heater 102, a control system 103 and a dryness sensor 104. The downhole electric heater 102 heats the steam in the steam injection well, thereby increasing the steam dryness value of the steam corresponding to different depths. When the steam dryness value is too low, it cannot meet the production requirements of the steam injection well at a set depth. In addition, when the steam dryness value is too high, the heat exchange efficiency between the downhole steam and the heater will be reduced. If production is carried out at the current low heat exchange efficiency, the heating cost will be increased, resulting in a significant increase in production costs and reduced economic benefits.
[0034] Based on this, by setting the steam dryness sensor 104 in the high-power electric heating power regulation system 100, the steam dryness value of the steam in the steam injection well is obtained in real time. Then, the steam dryness value of the steam in the steam injection well is monitored in real time by the control system 103, and based on the steam dryness value, the output power of the power regulation device 101 is controlled. According to different output powers, the heating power of the downhole electric heater 102 is controlled, thereby controlling the steam dryness value of the steam in the steam injection well.
[0035] Furthermore, the power regulation device 101 also includes a main control cabinet 105, which is connected to the power unit cabinet 107 via optical fiber, and the main control cabinet 105 is connected to the human-machine interface 106 via a port. The main control cabinet 105 is used to detect the input voltage and current and the output voltage and current of the power regulation device 101, and is used to control the power unit cabinet 107 and the human-machine interface 106.
[0036] In this embodiment, the main control cabinet 105 transmits control data to the power unit cabinet 107 through optical fiber, thereby driving the rectifier module and the inverter module in the power unit cabinet 107. Based on the control data transmitted by the main control cabinet 105, the output voltage of the rectifier module and the inverter module is controlled. It is also possible to feed back the status in the power unit cabinet 107 to the main control cabinet 105. In addition, the control cabinet transmits control data to the power unit cabinet 107 through optical fiber, thereby driving the unit bypass module in the power unit cabinet 107, and feeding back the status of the bypass contactor in the unit bypass module to the control cabinet.
[0037] Furthermore, the power regulating device 101 also includes a human-machine interface 106 , which is connected to the main control cabinet 105 via a port. The human-machine interface 106 is used to provide real-time feedback on various states and parameters of the power regulating device 101 and to set various functions of the power regulating device 101 .
[0038] In this embodiment, the human-machine interface 106 includes three functions: status and parameter display, parameter setting, and system control. Through the status and parameter display function, various states and parameters of the power regulating device 101 can be fed back in real time. Through the parameter setting function, the parameters of the power regulating device 101 can be set. Through the system control function, the charging, starting, stopping and resetting functions of the power regulating device 101 can be realized.
[0039] Furthermore, the power regulating device 101 further includes a power unit cabinet 107 , which is connected to the main control cabinet 105 via an optical fiber, and is used to obtain an AC voltage with adjustable frequency and voltage.
[0040] In this embodiment, the high-voltage input voltage is stepped down and isolated by the phase-shifting transformer 109 and then transmitted to the power unit cabinet 107. The input AC voltage is converted into a DC voltage by the rectifier module in the power unit cabinet 107. The obtained DC voltage is then converted into an AC voltage by the inverter module, and the AC voltage is PWM modulated to obtain an AC voltage with adjustable frequency and voltage.
[0041] Furthermore, the power regulating device 101 further includes a filter cabinet 108 , which is connected to the power unit cabinet 107 . The filter cabinet 108 is used to control the waveform corresponding to the output voltage of the power regulating device 101 .
[0042] In this embodiment, since the harmonic peak of the output voltage of the power unit cabinet 107 is large, it may cause an impact on the grid voltage. Therefore, in order to solve the above problem, a filter cabinet 108 can be connected to the output end of the power unit cabinet 107. Through the filter cabinet 108, the voltage with a large harmonic peak can be filtered to obtain a sine wave with a better waveform, and the overall harmonic of the above sine wave is controlled to be less than a preset threshold.
[0043] Furthermore, the power regulating device 101 further includes a phase-shifting transformer 109 , which is connected to the power unit cabinet 107 . The phase-shifting transformer 109 is used to control the phase of the input voltage and increase or decrease the input voltage.
[0044] Furthermore, the power unit cabinet 107 also includes a rectifier module (not shown in the figure), which is used to convert alternating current into direct current.
[0045] Furthermore, the power unit cabinet 107 further includes an inverter module (not shown in the figure), and the inverter module is used to convert direct current into alternating current.
[0046] Furthermore, the power unit cabinet 107 further includes a unit bypass module (not shown in the figure), which is used to control the conduction of the voltage in the power unit cabinet 107 .
[0047] In this embodiment, the unit bypass module receives control data from the main control cabinet 105 through optical fiber, thereby driving the bypass contactor in the unit bypass module according to the control data, and can feed back the state of the bypass contactor to the main control cabinet 105. If a power unit cabinet 107 fails, the unit bypass module will control the bypass contactor to short-circuit the corresponding power unit bypass, so that it can continue to work in a non-shutdown state.
[0048] Furthermore, the high-power electric heating power regulation system 100 also includes a power supply device 110 , which is used to supply power to the components in the high-power electric heating power regulation system 100 .
[0049] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:
[0050] First, the steam dryness value in the steam injection well is obtained through the dryness sensor. Then, the obtained steam dryness value is transmitted to the control system through optical fiber transmission. Since the steam dryness value requirements at different depths are inconsistent, the control system analyzes the requirements for different steam dryness values and the obtained steam dryness value in the well to determine the heating power corresponding to different depths. Based on this, the control system transmits the output power control instruction obtained from the analysis to the power regulation device. In response to the above control instruction, the power regulation device controls the downhole heater to heat according to the output power in the instruction, thereby realizing accurate control of the downhole steam dryness value.
[0051] In summary, the present invention can quickly and accurately adjust the output voltage of the downhole electric heater, change the heating power of the downhole electric heater, and perform secondary heating on the steam injected into the downhole. By reasonably controlling the power operation of the downhole electric heater, it can not only control the mining requirements of deep oil reservoirs, but also save electricity costs, improve the economic benefits of mining, and greatly improve the recovery rate of deep well oil reservoirs without polluting the surrounding environment, realizing clean energy substitution.
[0052] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A high-power electric heating power regulation system, characterized in that: The system includes a power regulating device, a downhole electric heater, a control system and a dryness sensor; The power regulating device is connected to the downhole electric heater via a cable, and the power regulating device is connected to the control system via an optical fiber, and the power regulating device is used to control the heating power of the downhole electric heater; The control system is connected to the power regulating device and the steam dryness sensor via an optical fiber, and the control system is used to control the output power of the power regulating device and monitor the steam dryness value obtained by the steam dryness sensor; The downhole electric heater is connected to the power regulating device through a cable, and the downhole electric heater is used to control the steam quality value in the well; The dryness sensor is connected to the control system via an optical fiber, and the dryness sensor is used to obtain the steam dryness value in the well.
2. The system according to claim 1, characterized in that The power regulating device also includes a main control cabinet, which is connected to the power unit cabinet via optical fiber, and is connected to the human-machine interface via a port. The main control cabinet is used to detect the input voltage and current and the output voltage and current of the power regulating device, and is used to control the power unit cabinet and the human-machine interface.
3. The system according to claim 2, characterized in that The power regulating device also includes a human-machine interface, which is connected to the main control cabinet through a port. The human-machine interface is used to provide real-time feedback on various states and parameters of the power regulating device and to set various functions of the power regulating device.
4. The system according to claim 2, characterized in that The power regulation device further comprises a power unit cabinet, which is connected to the main control cabinet via an optical fiber, and is used to obtain an AC voltage with adjustable frequency and voltage.
5. The system according to claim 2, characterized in that The power regulating device further comprises a filter cabinet, which is connected to the power unit cabinet and is used to control a waveform corresponding to an output voltage of the power regulating device.
6. The system according to claim 2, characterized in that The power regulation device further includes a phase-shifting transformer, which is connected to the power unit cabinet and is used to control the phase of the input voltage and increase or decrease the input voltage.
7. The system according to claim 2, characterized in that The power unit cabinet also includes a rectifier module, which is used to convert alternating current into direct current.
8. The system according to claim 2, characterized in that The power unit cabinet also includes an inverter module, which is used to convert direct current into alternating current.
9. The system according to claim 2, characterized in that The power unit cabinet further includes a unit bypass module, and the unit bypass module is used to control the conduction of the voltage in the power unit cabinet.
10. The system according to any one of claims 1 to 9, characterized in that: The system also includes a power supply device, which is used to supply power to the components in the high-power electric heating power regulation system.