A method for configuring power supply equipment for coordinated power grid and energy storage battery in oil and gas drilling

Abstract

This invention discloses a configuration method for collaborative power supply equipment between the power grid and energy storage batteries in oil and gas drilling operations. Belonging to the field of energy storage technology, it primarily addresses the configuration issues of power grid capacity, minimum energy storage battery capacity, and maximum allowable charge / discharge power in collaborative power supply modes for oil and gas drilling. Based on Kalman filtering and power change rate analysis of existing historical drilling operation data, this method calculates the required power grid capacity and minimum energy storage battery capacity. Furthermore, it calculates the maximum allowable charge / discharge power of the energy storage battery based on the seamless switching requirements of the battery output. This method can be used to design equipment configuration schemes for collaborative power supply between the power grid and energy storage batteries in oil and gas drilling operations, reducing the energy supply cost of oil and gas drilling operations.

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. Background Technology

[0002] To meet the peak power demands of oil and gas drilling operations, the grid capacity under the grid power supply mode is typically set up based on the maximum peak power demand, generally 10KV / 2500KVA. However, the power demand of oil and gas drilling operations is relatively low under most operating conditions, resulting in low grid utilization for extended periods and increasing the costs of grid setup and capacity occupancy for oil and gas drilling operations.

[0003] In recent years, energy storage batteries have been proposed to be used in conjunction with the power grid to power oil and gas drilling operations. Based on the "peak shaving and valley filling" mechanism of energy storage batteries, the power supply safety for oil and gas drilling operations can be guaranteed even when the grid capacity is reduced. For coordinated power supply of the power grid and energy storage batteries in oil and gas drilling operations, grid capacity, energy storage battery capacity, and the maximum allowable charge and discharge power of the energy storage batteries are key factors affecting the cost of power supply for oil and gas drilling. Determining the grid and energy storage battery configuration for the drilling rig is a prerequisite for using coordinated power supply. Under normal drilling conditions, mud pumps, winches, and top drives may start simultaneously, typically with the highest peak power. Furthermore, the duration of normal drilling operations for a single standpipe is relatively long, which is the core basis for determining the grid and energy storage battery configuration. Since the use of energy storage batteries in oil and gas drilling is still in its early stages, there is currently no specific energy supply equipment configuration plan for the coordinated power supply mode. Therefore, there is an urgent need for a method to configure power grid and energy storage battery co-powered equipment for oil and gas drilling. By combining existing drilling operation power data and using Kalman filtering and power change rate analysis, the grid capacity, minimum energy storage battery capacity, and maximum allowable charge and discharge power of the energy storage battery can be calculated. This method can reduce energy supply costs while ensuring safe and coordinated power supply of the power grid and energy storage battery for oil and gas drilling operations. Summary of the Invention

[0004] The purpose of this invention is to provide a configuration method for a power supply device that coordinates power grids and energy storage batteries in oil and gas drilling, thereby solving the above-mentioned problems and technical requirements. The technical solution of this invention is as follows:

[0005] A method for configuring a power supply device that integrates power grid and energy storage battery for oil and gas drilling;

[0006] The configuration method is based on a comprehensive analysis of existing drilling operation power data to determine the grid capacity, minimum energy storage battery capacity, and maximum allowable charging and discharging power of the energy storage battery.

[0007] The configuration method specifically includes:

[0008] Step 1: Based on the geological conditions of the area where oil and gas drilling operations will be carried out, the designed well type, well depth, and selected drilling rig model, select appropriate drilling power data of the actual drilling operations of the drilling team from the historical database of completed drilling operations. ;

[0009] Step 2: Analyze the actual power data for each stand in the selected well crew under normal drilling conditions. Perform Kalman filtering to obtain the power data after Kalman filtering. ;

[0010] Calculate the average Kalman filter power data for each stand shaft under normal drilling conditions. and standard deviation ;

[0011] in, Number the roots;

[0012] Step 3: Calculate the actual power change rate under normal drilling conditions for each support shaft. The maximum value of the actual power change rate under normal drilling conditions for each support shaft was obtained. ;

[0013] The rate of power change The calculation formula is:

[0014] ;

[0015] in, and To establish roots The actual power of adjacent data points under normal drilling operation conditions; The time interval for collecting adjacent power data points;

[0016] Step 4, calculate the grid installation capacity. ;

[0017] The power grid capacity The maximum power grid capacity required for each drilling rig under normal operating conditions;

[0018] Power grid capacity required for each foundation drilling operation under normal conditions The calculation formula is:

[0019] ;

[0020] in, Indicates rounding up; For the response lag time of the energy management system; The minimum power factor required by the power grid; This is the standard deviation coefficient, which is related to well depth and ranges from 1 to 1.5. This is the power fluctuation coefficient, which is related to the well type and ranges from 1 to 1.3.

[0021] Step 5: Calculate the minimum capacity of the energy storage battery. and the maximum allowable charge and discharge power of energy storage batteries ;

[0022] The minimum capacity of the energy storage battery The maximum energy storage battery capacity required for each drilling rig under normal drilling conditions;

[0023] The required energy storage battery capacity under normal drilling conditions for each support shaft The calculation formula is:

[0024] ;

[0025] in, To establish roots Under normal drilling operation conditions, the actual power exceeds The cumulative power consumption at that time; The discharge coefficient of the energy storage battery is set to 1.2. This is the emergency power supply during a power grid outage, with a value ranging from 300 to 500 kWh.

[0026] The maximum allowable charge and discharge power of the energy storage battery The calculation formula is:

[0027] ;

[0028] in, This represents the maximum actual power data of the selected drilling team's drilling operations.

[0029] The above-described solution of the present invention has at least the following beneficial effects:

[0030] (1) Based on geological conditions, design well type, well depth and drilling rig model, this method determines the available existing drilling power data, which can improve the consistency between the fluctuation pattern and peak value of the selected power data and the power requirements of the drilling operation to be carried out.

[0031] (2) Based on the comprehensive analysis of the operating rules of the main energy-consuming equipment under different drilling operation conditions, this method selects to perform Kalman filtering on the real power data under normal drilling operation conditions. On the one hand, it can ensure that the peak power data of oil and gas drilling operations are used, and on the other hand, it can reduce the impact of second-level power mutation on the calculation results and accurately reflect the overall fluctuation trend of drilling operation power.

[0032] (3) This method takes into account the effects of the power mutation rate of drilling operations and the response lag of the energy management system, ensuring that there is a certain difference between the power threshold corresponding to the discharge of the energy storage battery and the grid capacity, so as to avoid the power consumption caused by the response lag of the energy management system exceeding the grid capacity.

[0033] (4) The calculation of the energy storage battery capacity and the maximum allowable charge and discharge power in this method takes into account the need for seamless switching of energy storage battery output and short-term emergency power supply during sudden power outages in the grid. Attached Figure Description

[0034] Figure 1 This is a schematic flowchart of a method for configuring a power supply device for oil and gas drilling power grids and energy storage batteries in coordination, provided by an embodiment of the present invention.

[0035] Figure 2 This is a comparison of the actual power consumption and the power after Kalman filtering under normal drilling conditions in oil and gas drilling, provided by an embodiment of the present invention.

[0036] Figure 3 This is a comparison of power grid utilization before and after grid derating, 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] The drilling rig type corresponding to this embodiment is 50LDB, the well type is a horizontal well, and the maximum well depth is 5280m. Based on experience, , , Minimum power factor required by the power grid The value is 0.9. The energy management system collects data every 3 seconds, T=500ms.

[0039] See Figure 1 This is a schematic flowchart illustrating a method for configuring a power supply device for coordinated power supply of oil and gas drilling power grids and energy storage batteries, provided as an embodiment of the present invention. Figure 1 The configuration method specifically includes:

[0040] Step 1: Based on the geological conditions of the area where oil and gas drilling operations will be carried out, the designed well type, well depth, and selected drilling rig model, select appropriate drilling power data of the actual drilling operations of the drilling team from the historical database of completed drilling operations. ;

[0041] It is understandable that geological conditions, well design, well depth, and drilling rig signals are objective factors that affect peak power during normal drilling. Selecting historical operating power data from four aspects—geological conditions, well design, well depth, and drilling rig model—can improve the consistency between the overall fluctuation pattern and peak value of the selected power data and the power requirements of the oil and gas drilling operations to be carried out.

[0042] Step 2: Analyze the actual power data for each stand in the selected well crew under normal drilling conditions. Perform Kalman filtering to obtain the power data after Kalman filtering. ;

[0043] Calculate the average Kalman filter power data for each stand shaft under normal drilling conditions. and standard deviation ;

[0044] in, Number the roots;

[0045] It is understandable that during normal oil and gas drilling, the simultaneous operation of mud pumps, winches, and top drives is the moment when peak power occurs. This state usually occurs under normal oil and gas drilling conditions, and the normal drilling time of a single stand is relatively long. Selecting to perform Kalman filtering on the actual power data under normal drilling conditions can ensure that the peak power data of oil and gas drilling operations is used, and can also reduce the impact of second-level power mutations on the overall trend analysis of power consumption in oil and gas drilling operations.

[0046] Step 3: Calculate the actual power change rate under normal drilling conditions for each support shaft. The maximum value of the actual power change rate under normal drilling conditions for each support shaft was obtained. ;

[0047] The rate of power change The calculation formula is:

[0048] ;

[0049] in, and To establish roots The actual power of adjacent data points under normal drilling operation conditions;

[0050] Understandably, if , ,but ;

[0051] Step 4, calculate the grid installation capacity. ;

[0052] The power grid capacity The maximum power grid capacity required for each drilling rig under normal operating conditions;

[0053] Power grid capacity required for each foundation drilling operation under normal conditions The calculation formula is:

[0054] ;

[0055] in, Indicates rounding up;

[0056] It is understandable that the calculation of the required power grid capacity under normal drilling conditions for each vertical shaft takes into account the overall trend of power consumption, the degree of overall power fluctuation, and the power surge caused by the lag in the energy management system response.

[0057] like , , ,but ;

[0058] like ,but ;

[0059] Step 5: Calculate the minimum capacity of the energy storage battery. and the maximum allowable charge and discharge power of energy storage batteries ;

[0060] The minimum capacity of the energy storage battery The maximum energy storage battery capacity required for each drilling rig under normal drilling conditions;

[0061] The energy storage battery capacity required for each normal drilling operation of the support shaft The calculation formula is:

[0062] ;

[0063] in, To establish roots Under normal drilling operation conditions, the actual power exceeds The cumulative power consumption at that time;

[0064] The maximum allowable charge and discharge power of the energy storage battery The calculation formula is:

[0065] ;

[0066] in, The maximum actual power data of the selected drilling team's drilling operations;

[0067] Understandably, if , , ,but ;

[0068] like ,but ;

[0069] like ,but It is used to meet the requirement of seamless switching of energy storage battery output in the event of a power grid outage.

[0070] See Figure 2 This invention provides a comparison of actual power consumption and Kalman-filtered power consumption under normal oil and gas drilling operation conditions, as well as an embodiment thereof. It also includes a comparison of grid utilization rates before and after grid derating, obtained using this invention. Figure 3 As shown, after reducing the grid capacity from 2500KVA to 1600KVA, the average grid capacity utilization rate increased by more than 50%.

[0071] 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 power supply equipment for coordinated power grid and energy storage battery in oil and gas drilling, characterized in that: The configuration method specifically includes: Step 1: Based on the geological conditions of the area where oil and gas drilling operations will be carried out, the designed well type, well depth, and selected drilling rig model, select appropriate drilling power data of the actual drilling operations of the drilling team from the historical database of completed drilling operations. ; Step 2: Analyze the actual power data for each stand in the selected well crew under normal drilling conditions. Perform Kalman filtering to obtain the power data after Kalman filtering. ; Calculate the average Kalman filter power data for each stand shaft under normal drilling conditions. and standard deviation ; in, Number the roots; Step 3: Calculate the actual power change rate under normal drilling conditions for each support shaft. The maximum value of the actual power change rate under normal drilling conditions for each support shaft was obtained. ; The rate of power change The calculation formula is: ； in, and To establish roots The actual power of adjacent data points under normal drilling operation conditions; The time interval for collecting adjacent power data points; Step 4, calculate the grid installation capacity. ; The power grid capacity The maximum power grid capacity required for each drilling rig under normal operating conditions; Power grid capacity required for each foundation drilling operation under normal conditions The calculation formula is: ； in, Indicates rounding up; For the response lag time of the energy management system; The minimum power factor required by the power grid; This is the standard deviation coefficient, which is related to well depth and ranges from 1 to 1.

5. This is the power fluctuation coefficient, which is related to the well type and ranges from 1 to 1.

3. Step 5: Calculate the minimum capacity of the energy storage battery. and the maximum allowable charge and discharge power of energy storage batteries ; The minimum capacity of the energy storage battery The maximum energy storage battery capacity required for each drilling rig under normal drilling conditions; The required energy storage battery capacity under normal drilling conditions for each support shaft The calculation formula is: ； in, To establish roots Under normal drilling operation conditions, the actual power exceeds The cumulative power consumption at that time; The discharge coefficient of the energy storage battery is set to 1.

2. This is the emergency power supply during a power grid outage, with a value ranging from 300 to 500 kWh. The maximum allowable charge and discharge power of the energy storage battery The calculation formula is: ； in, This represents the maximum actual power data of the selected drilling team's drilling operations.

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