A method for configuring oil and gas drilling power grid and energy storage battery collaborative energy supply equipment considering charge and discharge balance

Abstract

The application discloses a kind of oil and gas drilling power grid and energy storage battery collaborative energy supply equipment configuration method considering charge-discharge balance, belongs to energy storage technical field, mainly solves oil and gas drilling under the mode of power grid and energy storage battery collaborative energy supply, power grid capacity, energy storage battery capacity and energy storage battery maximum charge-discharge power configuration problem, ensure the balance between the dischargeable capacity and the chargeable capacity of energy storage battery under normal drilling operation condition, and meet the demand of non-inductive switching under the condition of power grid sudden power failure.This method combines the existing drilling operation historical data, based on the statistical analysis of normal drilling operation power characteristics and normal drilling connection length, calculates the power grid capacity, energy storage battery capacity and energy storage battery maximum charge-discharge power, while ensuring the safe energy supply of oil and gas drilling operation power grid and energy storage battery, maximally reduces the energy supply cost.

Description

Technical Field

[0001] This invention belongs to the field of energy storage technology, specifically, it relates to a configuration method for a collaborative power supply device for oil and gas drilling power grids and energy storage batteries that takes into account charge and discharge balance. Background Technology

[0002] The shift to an "electricity (gas) instead of oil" power supply model in the oil and gas drilling sector has become a major measure to address the high energy consumption and severe pollution of traditional diesel generators. Currently, oil and gas drilling operations under the grid power supply model primarily determine the grid capacity (generally 10kV / 2500kVA) based on peak electricity demand, resulting in low grid utilization in most cases and increasing the cost of power supply for oil and gas drilling. To address the issue of low grid utilization under the grid power supply model for oil and gas drilling, energy storage batteries have been proposed to work in conjunction with the grid to supply power to oil and gas drilling operations. Based on the "peak shaving and valley filling" mechanism of energy storage batteries, on the one hand, the grid capacity is reduced, improving grid utilization; on the other hand, the impact of sudden load changes on power supply equipment is reduced. This, in turn, reduces the cost of oil and gas drilling from both grid installation costs and capacity occupancy fees while ensuring the safety of power supply.

[0003] Normal drilling is the main process in oil and gas drilling operations, accounting for about 50% of the total drilling time. In the absence of downhole accidents, the peak power of oil and gas drilling operations occurs under normal drilling conditions. Furthermore, under continuous normal drilling conditions, the average power consumption of oil and gas drilling equipment is relatively high, with only a brief decrease during stand-up connections. Therefore, the configuration of the power grid and energy storage batteries should not only minimize grid capacity to improve utilization, but also fully consider the charging scenarios and charging time of energy storage batteries under normal drilling conditions. This is to avoid situations where the total discharge capacity of the energy storage batteries exceeds the total rechargeable capacity, affecting the sustainability of the coordinated and safe power supply from the power grid and energy storage batteries. Therefore, there is an urgent need for a configuration method for coordinated power supply equipment for oil and gas drilling that considers charge-discharge balance.

[0004] The Chinese patent CN120810748B, entitled "A Method for Configuring Power Supply Equipment for Coordinated Power Grid and Energy Storage Battery in Oil and Gas Drilling," determines the grid capacity by applying Kalman filtering to the power consumption under normal drilling conditions, combining the average power value and standard deviation after filtering, and then determining the minimum energy storage battery capacity based on the discharge amount during normal drilling of all drilling rigs. The differences between this method and our method are: 1. This method determines the grid capacity and energy storage battery capacity based on the overall trend of power consumption under normal drilling conditions, without considering when the energy storage battery is charged. Our method explicitly states that the grid and energy storage battery configuration is based on the energy storage battery charging during drilling rig connection; 2. While the energy storage battery capacity configuration in this method meets the requirements, it cannot guarantee that the energy storage battery's charging capacity meets the demand. Our method determines the grid and energy storage battery capacity based on the premise of energy storage battery charge-discharge balance, fully ensuring that the rechargeable energy storage battery is not less than the required discharge amount. Summary of the Invention

[0005] The purpose of this invention is to provide a configuration method for a collaborative power supply device for oil and gas drilling power grids and energy storage batteries that considers charge and discharge balance, thereby solving the above-mentioned problems and technical requirements. The technical solution of this invention is as follows:

[0006] A method for configuring an oil and gas drilling grid and an energy storage battery to provide coordinated power supply, taking into account charge and discharge balance;

[0007] The configuration method combines existing historical drilling operation data and, based on statistical analysis of the power characteristics of normal drilling operations and the duration of normal drilling connection, calculates the grid capacity, energy storage battery capacity, and maximum charging and discharging power.

[0008] The configuration method specifically includes:

[0009] Step 1: Based on the geological conditions of the drilling operation area, the designed well type, well depth, drilling rig model, and selected drilling fluid, select the most suitable real drilling operation data from the existing historical database, and filter out the power under normal drilling conditions. and the maximum rate of change of power ;

[0010] in, The support column number is for normal drilling conditions;

[0011] Step 2, for each root... Perform Kalman filtering and calculate the average power after filtering. and standard deviation ;

[0012] Step 3, confirm and The root number corresponding to the maximum sum ,Sure The corresponding number of wells opened, N;

[0013] Step 4: Calculate the average drilling stand time under normal drilling conditions when the number of wells opened is N. and standard deviation and average power during the rooting period ;

[0014] Step 5: Determine the grid capacity ;

[0015] The power grid capacity This represents the maximum power grid capacity required for each stand shaft under normal drilling operation conditions during N-stage drilling.

[0016] The required power grid capacity for each support when drilling begins (N). Should meet:

[0017] ;

[0018] in, To establish roots Under normal drilling operation conditions, the actual power exceeds The cumulative power consumption at that time; The minimum power factor required by the power grid; For energy storage system response time; For safety margin, a value of 1.1-1.3 is used. The time interval for collecting adjacent power data points; The charging and discharging efficiency of energy storage batteries is related to the battery cell and ranges from 0.8 to 0.95.

[0019] Step 6, Calculate the energy storage battery capacity and maximum charge / discharge power ;

[0020] The energy storage battery capacity The calculation formula is:

[0021] ;

[0022] The maximum charge / discharge power of the energy storage battery The calculation formula is:

[0023] ;

[0024] in, This refers to the amount of electricity needed for emergency energy storage when the power grid suddenly fails, and is related to emergency operations. This represents the maximum value under normal drilling conditions from the selected actual drilling operation data.

[0025] The above-described solution of the present invention has at least the following beneficial effects:

[0026] (1) This method selects real drilling power data from multiple aspects such as geological conditions, well type, well depth, drilling rig model and drilling fluid, which can improve the reliability of power grid and energy storage battery configuration.

[0027] (2) Based on the Kalman filtering of the actual power under normal drilling operation conditions, this method determines the corresponding number of wells to be opened based on the sum of the average value and standard deviation of the Kalman filtered power data, and calculates the corresponding connection time and average power. This can ensure that the power grid and energy storage battery configuration meet the energy supply requirements under different number of wells to be opened.

[0028] (3) This method takes into account the balance of charging and discharging of energy storage batteries. On the one hand, it can avoid the grid capacity being set too high, resulting in poor utilization of energy storage batteries. On the other hand, it can also avoid the grid capacity being set too low, resulting in the energy storage battery charging amount not being able to meet the continuous discharge demand during the connection period.

[0029] (4) This method considers not only the impact of sudden power consumption changes and the response lag of the energy storage battery system when calculating the configuration of the power grid and energy storage battery, but also the emergency power supply demand when the power grid suddenly goes out. Attached Figure Description

[0030] Figure 1 This is a schematic flowchart of a method for configuring an oil and gas drilling power grid and an energy storage battery collaborative power supply device that takes into account charge and discharge balance, according to an embodiment of the present invention. Detailed Implementation

[0031] 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.

[0032] In this embodiment, the parameter values ​​are as follows: , , , , , .

[0033] See Figure 1 This is a schematic flowchart illustrating a method for configuring an oil and gas drilling power grid and an energy storage battery collaborative power supply device that considers charge and discharge balance, as provided in an embodiment of the present invention. Figure 1 The configuration method specifically includes:

[0034] Step 1: Based on the geological conditions of the drilling operation area, the designed well type, well depth, drilling rig model, and selected drilling fluid, select the most suitable real drilling operation data from the existing historical database, and filter out the power under normal drilling conditions. and the maximum rate of change of power ;

[0035] in, The support column number is for normal drilling conditions;

[0036] It is understandable that geological conditions, well design, well depth, drilling rig model, and drilling fluid are objective factors that affect peak power during normal drilling. Selecting historical operating power data from five aspects—geological conditions, well design, well depth, drilling rig model, and drilling fluid—can improve the reliability of power grid and energy storage battery configuration.

[0037] The simultaneous activation of the mud pump, winch, and top drive is the moment when peak power occurs. This state usually occurs under normal drilling conditions in oil and gas drilling. Selecting the actual power data under normal drilling conditions can ensure that the peak power data of oil and gas drilling operations is used.

[0038] Step 2, for each root... Perform Kalman filtering and calculate the average power after filtering. and standard deviation ;

[0039] It is understandable that during normal oil and gas drilling, power fluctuations are frequent and there are sudden changes. Performing Kalman filtering on the power data can reduce the impact of power changes on the overall trend analysis of oil and gas drilling power.

[0040] Step 3, confirm and The root number corresponding to the maximum sum ,Sure The corresponding number of wells opened, N;

[0041] It is understandable that the average power consumption of normal drilling operations varies greatly under different drilling counts. By selecting the corresponding drilling count through the average power value and the maximum standard deviation after Kalman filtering, it can be ensured that the subsequently determined grid and energy storage battery parameters meet the energy supply requirements under all drilling counts.

[0042] Step 4: Calculate the average drilling stand time under normal drilling conditions when the number of wells opened is N. and standard deviation and average power during the rooting period ;

[0043] Step 5: Determine the grid capacity ;

[0044] The power grid capacity This represents the maximum power grid capacity required for each stand shaft under normal drilling operation conditions during N-stage drilling.

[0045] The required power grid capacity for each support when drilling begins (N). Should meet:

[0046] ;

[0047] in, To establish roots Under normal drilling operation conditions, the actual power exceeds The cumulative power consumption at that time;

[0048] Understandably, considering the charging and discharging efficiency of the energy storage battery, the power factor of the grid, the maximum rate of power change, and the response lag of the energy storage battery system, the charging amount during each connection between vertical supports should not be less than the discharging amount during the normal drilling process of that vertical support. Adjusting the grid capacity can change the charging and discharging power of the energy storage battery, thereby achieving a balance between the charging and discharging amounts of the energy storage battery. Determining the grid capacity based on the shortest connection time parameter can ensure that the grid capacity meets the normal drilling operation requirements of all vertical supports.

[0049] Step 6, Calculate the energy storage battery capacity and maximum charge / discharge power ;

[0050] The energy storage battery capacity The calculation formula is:

[0051] ;

[0052] The maximum charge / discharge power of the energy storage battery The calculation formula is:

[0053] ;

[0054] in, The maximum value of the selected real drilling operation data under normal drilling conditions;

[0055] It is understandable that the final capacity of the energy storage battery is greater than the charging and discharging capacity requirement of the energy storage battery under normal drilling conditions, and can be used to adjust the difference in the charging and discharging capacity of the energy storage battery.

[0056] like , , , , , ,but , .

[0057] 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 made thereon, shall fall within the scope of protection of the present invention.

Claims

1. A method for configuring an oil and gas drilling power grid and energy storage battery collaborative power supply device considering charge and discharge balance, characterized in that: The method specifically comprises: Step 1, based on the geological conditions of the drilling operation area, the designed well type, the well depth, the drilling rig model and the selected drilling fluid, the most suitable real drilling operation data is selected from the existing historical database, and the power under the normal drilling condition is screened out and the maximum value of the power change rate ; wherein, is the stand number for normal drilling conditions; Step 2, Kalman filter processing is performed on each stand respectively to calculate the filtered power average value and the standard deviation ; Step 3, determining and the total maximum corresponding to the number of stands and according to determine the corresponding number of wells N; Step 4, calculate the average length of time to make up a stand while drilling under normal drilling conditions for N wells and the standard deviation and the average power during stand up ; Step 5, determining grid capacity ; The maximum value of the power grid capacity required for each stand to normally drill under the drilling condition of the N open well The maximum value of the power grid capacity required for each stand to normally drill under the drilling condition of the N open well N required electrical grid capacity per stand while drilling the well Should be met: ； Wherein, is the real power of the drilling rig is the normal drilling operation condition is the cumulative power when the real power exceeds is the minimum power factor required by the power grid is the response lag time of the energy storage battery system is the safety factor, with a value of 1.1-1.3 is the adjacent power data point collection time interval is the charging and discharging efficiency of the energy storage battery, related to the battery cell, with a value of 0.8-0.95 Step 6, calculating the energy storage battery capacity and the maximum charge and discharge power of the energy storage battery ; The energy storage battery capacity The calculation formula is: ； The maximum charge-discharge power of the energy storage battery The calculation formula is: ； wherein, is the amount of power required for the energy storage battery to be used in emergency when the power grid is suddenly powered off; is the maximum power value of the selected real drilling operation data under normal drilling conditions.

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