A method for multi-energy complementary and collaborative energy supply in drilling operation drilling conditions based on power balance

Abstract

The application discloses a multi-energy complementary and collaborative energy supply method based on power balance in drilling operation drilling conditions, belongs to the technical field of energy storage, and mainly solves the problem that available power of energy storage batteries cannot meet continuous discharge demand caused by occasional high-load drilling conditions in the collaborative energy supply mode of power grids and energy storage batteries, and ensures charge-discharge balance of the energy storage batteries. The method uses a power grid-energy storage battery-diesel generator to establish a multi-energy complementary and collaborative energy supply mode of drilling operation, and through power consumption preposition prediction and double energy storage battery rotation, power grid utilization is maximized while drilling operation energy supply safety is ensured.

Description

Technical Field

[0001] This invention belongs to the field of energy storage technology, specifically, it relates to a multi-energy complementary and coordinated energy supply method based on power balance in drilling operations. Background Technology

[0002] Oil and gas drilling operations are characterized by high power, strong impact, and strong process cycle. The drilling operation power supply under the "electricity-for-oil" power supply mode adopts the "grid main supply + diesel generator cold standby emergency" mode, which has the following inherent shortcomings: (1) The grid needs to be configured according to the maximum peak power of drilling, the grid has a large installed capacity redundancy and an extremely low average utilization rate; (2) The cold standby diesel generator is only passively put into operation after the grid is cut off, and it is idle for a long time, resulting in extremely low equipment utilization.

[0003] To address the issues of high grid capacity and insufficient utilization, energy storage batteries have been proposed for collaborative power supply to drilling operations. While the introduction of energy storage batteries can effectively reduce grid capacity and save on infrastructure costs, these batteries are only charged during connection to the drilling rig. During occasional high-load drilling conditions, a single energy storage battery needs to continuously discharge for extended periods, and the available power cannot meet the continuous discharge demand, affecting the safety of collaborative power supply to drilling operations from the grid and energy storage batteries. Therefore, there is an urgent need for an effective multi-energy complementary collaborative power supply method for oil and gas drilling. This method should reduce grid capacity while ensuring a balance in the continuous charging and discharging of energy storage batteries through grid-dual energy storage-diesel generator collaboration, thereby reducing grid construction costs while guaranteeing the safety of power supply to drilling operations. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-energy complementary and coordinated power supply method based on power balance under drilling conditions, to solve the above-mentioned problems and technical requirements. The technical solution of this invention is as follows:

[0005] A multi-energy complementary and coordinated power supply method based on power balance under drilling conditions;

[0006] With the power grid as the main power source, the first energy storage battery is in an online working state, working in conjunction with the power grid to undertake peak shaving tasks for drilling operations. The second energy storage battery is in an offline hot standby state, and the diesel generator is normally kept in cold standby shutdown, only charging the second energy storage battery in emergencies.

[0007] The method includes the following steps:

[0008] Step 1: The energy management system collects the discharge power data of the first energy storage battery and the current drilling depth data under drilling conditions. Through sampling and statistics using a fixed sliding window, the average discharge power of the energy storage under the current drilling conditions is calculated. and remaining drilling time ;

[0009] Step 2: Based on the average discharge power of the first energy storage battery With remaining drilling time Calculate the total discharge required by the energy storage battery for the current drilling operation. ;

[0010] Step 3: Collect the state-of-charge data of the dual energy storage batteries, and calculate the effective amount of electricity that can be safely used by the dual energy storage batteries by combining the rated capacity of the energy storage batteries with the minimum protection charge threshold. ;

[0011] Step 4: If the diesel generator does not start, according to... and The size relationship and the state of charge of the energy storage battery determine whether to start the cold standby diesel generator;

[0012] Step 5: Determine whether it is necessary to use a static switching switch to rotate the two sets of energy storage batteries;

[0013] Step 6: If the diesel generator is already started, according to... and The size relationship and the state of charge of the energy storage battery determine whether to shut down the diesel generator.

[0014] Furthermore, the first and second energy storage batteries are distinguished only by their working status. Regardless of how the two sets of energy storage batteries are rotated, the first energy storage battery is always the one that supplies power in coordination with the grid, while the second energy storage battery is always the one that is on standby.

[0015] Furthermore, in steps 1, 2, and 3 , , and Calculate using the following formula:

[0016] ;

[0017] ;

[0018] ;

[0019] ;

[0020] ;

[0021] ;

[0022] in, The number of data points collected by the energy management system over the past 5 minutes; This represents the real-time discharge power data of the i-th energy storage battery. The current drilling depth is [not specified]. This represents the average drilling speed over the past 5 minutes. and These represent the available effective power of the first and second energy storage batteries, respectively. and These are the rated capacities of the first and second energy storage batteries, respectively. and These represent the states of charge of the first and second energy storage batteries, respectively. This is the minimum safe protection charge threshold for the energy storage battery, with a value of 0.2.

[0023] Furthermore, step 4 specifically includes the following sub-steps:

[0024] Step 41, if Then there is no need to start the diesel generator to charge the second energy storage battery;

[0025] Step 42, if Then when Start the diesel generator to charge the second energy storage battery; otherwise, there is no need to start the diesel generator.

[0026] Furthermore, in step 5... The first and second energy storage batteries use a static switching switch to achieve millisecond-level switching; otherwise, the two energy storage batteries do not switch.

[0027] Furthermore, step 6 specifically includes the following sub-steps:

[0028] Step 61, if Then when If the diesel generator is not in use, turn it off; otherwise, keep the diesel generator running.

[0029] Step 62, if If so, then shut down the diesel generator.

[0030] Furthermore, the first energy storage battery can only be charged by the grid during the connection period; at other times it only discharges and does not recharge.

[0031] Furthermore, the diesel generator is interlocked with the power grid. When the power grid is supplying power, the diesel generator only serves as a supplementary power source for the energy storage battery. In the event of a power grid failure, the diesel generator switches to become the main emergency power source for drilling, working in conjunction with the first energy storage battery to supply power to the drilling operation.

[0032] The above-described solution of the present invention has at least the following beneficial effects:

[0033] (1) This method utilizes the power grid, energy storage battery, and diesel generator to establish a multi-energy complementary and coordinated energy supply mode for drilling operations. By predicting electricity consumption in advance and rotating the dual energy storage batteries, it can effectively solve the problem of occasional imbalance between charging and discharging of energy storage batteries under the condition of power grid capacity reduction, and ensure energy supply security while maximizing the utilization rate of the power grid.

[0034] (2) In this method, the cold standby diesel generator is upgraded to the core equipment for balancing the power supply system, which effectively revitalizes the idle power supply equipment in drilling operations and improves the overall energy efficiency of power supply.

[0035] (3) This method can further promote the application of battery energy storage in the field of oil and gas drilling and promote the green and low-carbon development of oil and gas resources. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a multi-energy complementary and coordinated power supply method for drilling operations based on power balance, provided by an embodiment of the present invention. Detailed Implementation

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the embodiments of the present invention include, but are not limited to, the following embodiments.

[0038] In this embodiment, the grid capacity is 1500KVA, and the rated capacity of both sets of energy storage batteries is [missing information]. The maximum discharge rate is 2C, and there is one 1200kW diesel generator in cold standby mode.

[0039] See Figure 1 This is a schematic flowchart illustrating a multi-energy complementary and coordinated power supply method for drilling operations based on power balance, provided as an embodiment of the present invention. Figure 1 The configuration method specifically includes:

[0040] The method includes the following steps:

[0041] Step 1: The energy management system collects the discharge power data of the first energy storage battery and the current drilling depth data under drilling conditions. Through sampling and statistics using a fixed sliding window, the average discharge power of the energy storage under the current drilling conditions is calculated. and remaining drilling time ;

[0042] Understandably, the energy management system collects the discharge power of the energy storage battery and the current drilling depth of the foundation according to a preset frequency, and uses the fixed sliding window method to calculate the average discharge power of the energy storage battery and the remaining drilling time. This ensures that the average discharge power of the energy storage battery and the remaining drilling time are dynamically adjusted with the drilling operation, thereby maximizing the calculation accuracy.

[0043] Step 2: Based on the average discharge power of the first energy storage battery With remaining drilling time Calculate the total discharge required by the energy storage battery for the current drilling operation. ;

[0044] Understandably, the total discharge required by the energy storage battery for subsequent drilling operations is also dynamically adjusted with changes in average discharge power and remaining drilling time. However, for drilling operations on the same vertical shaft, the average discharge power of the energy storage battery fluctuates relatively little.

[0045] Step 3: Collect the state-of-charge data of the dual energy storage batteries, and calculate the effective amount of electricity that can be safely used by the dual energy storage batteries by combining the rated capacity of the energy storage batteries with the minimum protection charge threshold. ;

[0046] Understandably, the effective amount of electricity that can be safely utilized by dual energy storage batteries needs to take into account the minimum protection charge threshold of the energy storage batteries to avoid over-discharge of the energy storage batteries.

[0047] Step 4: If the diesel generator does not start, according to... and The size relationship and the state of charge of the energy storage battery determine whether to start the cold standby diesel generator;

[0048] Understandably, the relationship between the total discharge required by the energy storage battery and the available effective charge reflects whether the dual energy storage batteries can meet the continuous discharge demand, and is a key indicator for starting the diesel generator. When the available effective charge of the dual energy storage batteries cannot meet the continuous discharge demand, the state of charge of the second energy storage battery determines when to start the diesel generator, thus avoiding frequent start-stop of the diesel generator.

[0049] Step 5: Determine whether it is necessary to use a static switching switch to rotate the two sets of energy storage batteries;

[0050] Understandably, static switching switches can achieve millisecond-level switching between two sets of energy storage batteries without affecting the normal operation of drilling. This is a very mature technology. The key is to determine whether switching is necessary and when to switch.

[0051] Step 6: If the diesel generator is already started, according to... and The size relationship and the state of charge of the energy storage battery determine whether to shut down the diesel generator.

[0052] It is understandable that step 6 is performed only if the diesel generator has started. If the diesel generator has not started, step 6 is skipped.

[0053] In a preferred embodiment of the present invention, the first and second energy storage batteries are distinguished only by their working state. Regardless of how the two sets of energy storage batteries are rotated, the first energy storage battery is always the one that supplies energy in coordination with the power grid, while the second energy storage battery is always the one that is on standby.

[0054] Understandably, if the energy storage battery A is used to supply energy in conjunction with the grid, and the backup energy storage battery B is used, then in this case, the first energy storage battery is A and the second energy storage battery is B; if the energy storage batteries A and B are rotated, then B becomes the first energy storage battery and A becomes the second energy storage battery.

[0055] In a preferred embodiment of the present invention, in steps 1, 2, and 3 , , and Calculate using the following formula:

[0056] ;

[0057] ;

[0058] ;

[0059] ;

[0060] ;

[0061] ;

[0062] in, The number of data points collected by the energy management system over the past 5 minutes; This represents the real-time discharge power data of the i-th energy storage battery. The current drilling depth is [not specified]. This represents the average drilling speed over the past 5 minutes. and These represent the available effective power of the first and second energy storage batteries, respectively. and These represent the states of charge of the first and second energy storage batteries, respectively.

[0063] Understandably, if , , , , ,but , , .

[0064] In a preferred embodiment of the present invention, step 4 specifically includes the following sub-steps:

[0065] Step 41, if Then there is no need to start the diesel generator to charge the second energy storage battery;

[0066] Step 42, if Then when Start the diesel generator to charge the second energy storage battery; otherwise, there is no need to start the diesel generator.

[0067] Understandably, if , Then there is no need to start the diesel generator; , , Then, the diesel generator needs to be started to charge the second energy storage battery.

[0068] In a preferred embodiment of the present invention, in step 5... The first and second energy storage batteries are switched at millisecond level using a static switching switch; otherwise, the dual energy storage batteries are not switched.

[0069] Understandably, if Therefore, regardless of whether the usable effective charge of the dual energy storage batteries meets the required total discharge capacity, the two sets of energy storage batteries need to be rotated; because the second energy storage battery is in and It needs to be charged regularly, so there will be no frequent switching between the two sets of energy storage batteries.

[0070] In a preferred embodiment of the present invention, step 6 specifically includes the following sub-steps:

[0071] Step 61, if Then when If the diesel generator is not in use, turn it off; otherwise, keep the diesel generator running.

[0072] Step 62, if Then shut down the diesel generator;

[0073] Understandably, if the diesel generator is already running, , If the diesel generator is running, then shut it off; if the diesel generator is already running, , , If so, continue to start the gas generator.

[0074] The above embodiments are merely one example of the implementation of the present invention and are not intended to limit the scope of protection of the present invention. Any changes made based on the design principles of the present invention, or any non-creative modifications, should fall within the scope of protection of the present invention.

Claims

1. A multi-energy complementary and coordinated power supply method for drilling operations based on power balance, characterized in that: With the power grid as the main power source, the first energy storage battery is in an online working state, working in conjunction with the power grid to undertake peak shaving tasks for drilling operations, while the second energy storage battery is in an offline hot standby state, and the diesel generator is normally kept in cold standby shutdown. The method includes the following steps: Step 1: The energy management system collects the discharge power data of the first energy storage battery and the current drilling depth data under drilling conditions. Through sampling and statistics using a fixed sliding window, the average discharge power of the energy storage under the current drilling conditions is calculated. and remaining drilling time ; Step 2: Based on the average discharge power of the first energy storage battery With remaining drilling time Calculate the total discharge required by the energy storage battery for the current drilling operation. ; Step 3: Collect the state-of-charge data of the dual energy storage batteries, and calculate the effective amount of electricity that can be safely used by the dual energy storage batteries by combining the rated capacity of the energy storage batteries with the minimum protection charge threshold. ; Step 4: If the diesel generator does not start, according to... and The size relationship and the state of charge of the energy storage battery determine whether to start the cold standby diesel generator; Step 5: Determine whether it is necessary to use a static switching switch to rotate the two sets of energy storage batteries; Step 6: If the diesel generator is already started, according to... and The size relationship and the state of charge of the energy storage battery determine whether to shut down the diesel generator.

2. The method for multi-energy complementary and coordinated power supply under drilling conditions based on power balance, as described in claim 1, is characterized in that: The first and second energy storage batteries are distinguished only by their working status. Regardless of how the two sets of energy storage batteries are rotated, the first energy storage battery is always the one that supplies power in coordination with the grid, while the second energy storage battery is always the one that is on standby.

3. The method for multi-energy complementary and coordinated power supply under drilling conditions based on power balance, as described in claim 1, is characterized in that: In steps 1, 2 and 3 , , and Calculate using the following formula: ； ； ； ； ； ； in, The number of data points collected by the energy management system over the past 5 minutes; This represents the real-time discharge power data of the i-th energy storage battery. The current drilling depth is [not specified]. This represents the average drilling speed over the past 5 minutes. and These represent the available effective power of the first and second energy storage batteries, respectively. and These are the rated capacities of the first and second energy storage batteries, respectively. and These represent the states of charge of the first and second energy storage batteries, respectively. This is the minimum safe protection charge threshold for the energy storage battery, with a value of 0.

2.

4. The multi-energy complementary and coordinated power supply method for drilling operations based on power balance as described in claim 1, characterized in that: Step 4 specifically includes the following sub-steps: Step 41, if Then there is no need to start the diesel generator to charge the second energy storage battery; Step 42, if Then when Start the diesel generator to charge the second energy storage battery; otherwise, there is no need to start the diesel generator.

5. The method for multi-energy complementary and coordinated power supply in drilling operations based on power balance, as described in claim 1, is characterized in that... In step 5 The first and second energy storage batteries use a static switching switch to achieve millisecond-level switching; otherwise, the two energy storage batteries do not switch.

6. The method for multi-energy complementary and coordinated power supply under drilling conditions based on power balance, as described in claim 1, is characterized in that: Step 6 specifically includes the following sub-steps: Step 61, if Then when If the diesel generator is not in use, turn it off; otherwise, keep the diesel generator running. Step 62, if If so, then shut down the diesel generator.

7. The method for multi-energy complementary and coordinated power supply in drilling operations based on power balance, as described in claim 1, is characterized in that... The first energy storage battery can only be charged by the grid during the period of connection to the grid; at other times, it only discharges and does not recharge.

8. The multi-energy complementary and coordinated power supply method for drilling operations based on power balance according to claim 1, characterized in that, The diesel generator is interlocked with the power grid. When the power grid is supplying power, the diesel generator only serves as a supplementary power source for the energy storage battery. In the event of a power grid failure, the diesel generator switches to become the main emergency power source for drilling, working in conjunction with the first energy storage battery to supply power to the drilling operation.

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