Oil and gas drilling power grid and energy storage battery collaborative energy supply equipment configuration method considering charge and discharge balance

Abstract

The invention discloses an oil and gas drilling power grid and energy storage battery cooperative energy supply equipment configuration method considering charge and discharge balance, belongs to the technical field of energy storage, and mainly solves the problem of power grid capacity, energy storage battery capacity and energy storage battery maximum charge and discharge power configuration of oil and gas drilling in a power grid and energy storage battery cooperative energy supply mode. The balance between the required discharge capacity and the chargeable capacity of the energy storage battery under the normal drilling operation working condition is ensured, and the non-inductive switching requirement under the condition that the power grid is suddenly powered off is met. The method comprises the following steps of: calculating the power grid erection capacity, the energy storage battery capacity and the maximum charging and discharging power of the energy storage battery on the basis of carrying out statistical analysis on normal drilling operation power characteristics and normal drilling three-joint unit connecting duration by combining existing drilling operation historical data; and the energy supply cost is reduced to the maximum extent while cooperative safe energy supply of the oil and gas drilling operation power grid and the energy storage battery is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of energy storage, and in particular relates to a method for configuring oil and gas drilling power grid and energy storage battery collaborative energy supply equipment considering charge and discharge balance. BACKGROUND

[0002] The "electric (gas) instead of oil" energy supply mode in the field of oil and gas drilling has become the main measure to solve the high energy consumption and serious pollution of traditional diesel generators. At present, the oil and gas drilling operation under the power grid energy supply mode mainly determines the power grid erection capacity (generally 10Kv / 2500KVA) according to the peak power demand, resulting in that the utilization rate of the power grid is relatively low in most cases, thereby increasing the oil and gas drilling energy supply cost. In view of the problem of low utilization rate of the power grid under the oil and gas drilling power grid energy supply mode, energy storage batteries are proposed to supply energy to oil and gas drilling operations in collaboration with the power grid. Based on the "peak load shifting" mechanism of the energy storage battery, on the one hand, the power grid erection capacity is reduced and the utilization rate of the power grid is improved, and on the other hand, the impact of sudden load on the power supply equipment is reduced, thereby reducing the cost of oil and gas drilling from the aspects of power grid erection cost and capacity occupation fee while ensuring the safety of oil and gas drilling energy supply.

[0003] Normal drilling is the main process flow of oil and gas drilling operation, accounting for about 50% of the entire drilling operation time. Under the condition of no downhole accident, the peak power of oil and gas drilling operation appears in the normal drilling condition. In addition, under the condition of continuous normal drilling, the average power consumption of oil and gas drilling equipment is high, and only during the stand-up period, there is a short-term reduction. Therefore, in addition to reducing the power grid capacity as much as possible to improve the utilization rate, the chargeable scenarios and charging time of the energy storage battery under the normal drilling operation condition should also be fully considered to avoid the situation that the total discharge amount of the energy storage battery is greater than the total chargeable amount, which affects the sustainability of the collaborative safe energy supply of the power grid and the energy storage battery, and therefore, a method for configuring oil and gas drilling power grid and energy storage battery collaborative energy supply equipment considering charge and discharge balance is urgently needed.

[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 power in a coordinated manner, 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 numbering of the support shaft under 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 determine the corresponding number of drilling openings N;

[0013] Step 4, calculate the average length of time for splicing a stand under normal drilling conditions when the number of drilling openings is N and the standard deviation , and the average power during splicing a stand ;

[0014] Step 5, determine the power grid capacity ;

[0015] The power grid capacity is the maximum required power grid capacity for each stand under normal drilling conditions when the number of drilling openings is N;

[0016] The required power grid capacity for each stand when the number of drilling openings is N should satisfy:

[0017] ;

[0018] wherein, is the cumulative power when the real power of the stand exceeds under normal drilling operation conditions; is the minimum power factor required by the power grid; is the response time of the energy storage system; is a 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, which is related to the battery cell and has a value of 0.8-0.95;

[0019] Step 6, calculate the energy storage battery capacity and the maximum charging and discharging power ;

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

[0021] ;

[0022] The calculation formula of the maximum charging and discharging power of the energy storage battery is:

[0023] ;

[0024] wherein, is the required power of the energy storage emergency when the power grid suddenly loses power, which is related to the emergency operation; is the maximum value of the selected real drilling operation data under normal drilling conditions.

[0025] The above scheme of the present application at least includes the following beneficial effects:

[0026] (1) The method selects real drilling operation power data from multiple aspects of geological conditions, designed well type, well depth, drilling rig type and selected drilling fluid, so that the reliability of power grid and energy storage battery configuration can be improved.

[0027] (2) The method determines the corresponding drilling open number and calculates the corresponding stand-by time and average power based on the average value and standard deviation sum of Kalman filter power data on the basis of Kalman filter of real power under normal drilling operation conditions, so that the power supply demand of power grid and energy storage battery configuration under different drilling open numbers can be ensured.

[0028] (3) The method comprehensively considers the charge-discharge balance of energy storage battery, which can avoid high power grid capacity and poor utilization of energy storage battery on the one hand, and avoid low power grid capacity and insufficient charging capacity of energy storage battery during stand-by on the other hand.

[0029] (4) The method not only considers the influence of power supply power mutation and energy storage battery system response lag during configuration calculation of power grid and energy storage battery, but also considers the emergency power supply demand during power grid power failure. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a kind of oil and gas drilling power grid and energy storage battery collaborative energy supply equipment configuration method flow chart provided by the embodiment of the present application considering charge-discharge balance. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely in combination with the drawings and specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. Obviously, the embodiments of the present application include but are not limited to the following examples.

[0032] The parameter values in this embodiment are respectively: , , , , , .

[0033] Referring to Figure 1 , a kind of oil and gas drilling power grid and energy storage battery collaborative energy supply equipment configuration method flow chart provided by the embodiment of the present application considering charge-discharge balance. As Figure 1 described, the configuration method specifically includes:

[0034] 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 normal drilling conditions is screened out and the maximum value of the power change rate ;

[0035] wherein, is the stand number under normal drilling conditions;

[0036] It can be understood that the geological conditions, the designed well type, the well depth, the drilling rig model and the selected drilling fluid are objective factors affecting the peak power in the normal drilling process, and selecting the historical operation power data from the five aspects of geological conditions, designed well type, well depth, drilling rig model and drilling fluid can improve the reliability of the configuration of the power grid and the energy storage battery;

[0037] The simultaneous opening of the mud pump, the drawworks and the top drive is the moment when the peak power occurs, and this state usually occurs in the normal drilling conditions of oil and gas drilling, and selecting the real power data under the normal drilling operation conditions can ensure that the peak power data of oil and gas drilling operation is used;

[0038] Step 2, the Kalman filter processing is performed on the of each stand respectively, the filtered power average value and the standard deviation are calculated;

[0039] It can be understood that in the normal drilling process of oil and gas drilling, the power fluctuates frequently and there are mutation cases, and the Kalman filter processing of the power data can reduce the influence of power mutation on the overall trend analysis of the power of oil and gas drilling operation;

[0040] Step 3, the stand number corresponding to the maximum sum of and is determined , and the drilling open number N corresponding to is determined;

[0041] It can be understood that under different drilling open numbers, the average level of the power consumption of normal drilling operation is quite different, and by selecting the drilling open number corresponding to the maximum value of the power average value and the standard deviation after Kalman filtering, it can be ensured that the subsequent determined parameters of the power grid and the energy storage battery meet the energy supply demand under all drilling open numbers;

[0042] Step 4, the average value of the stand connecting time under normal drilling conditions when the drilling open number is N and the standard deviation , and the average power during the stand connecting period are calculated;

[0043] Step 5, the power grid capacity ;

[0044] The power grid capacity The maximum value of the power grid capacity required for each stand during normal drilling operation of the N open well;

[0045] The power grid capacity required for each stand during the N open well Should meet:

[0046] ;

[0047] Wherein, The stand The cumulative power when the real power exceeds During normal drilling operation;

[0048] It can be understood that, on the basis of considering the charging and discharging efficiency of the energy storage battery, the power factor of the power grid, the maximum change rate of power, and the response lag of the energy storage battery system, the charging capacity of each stand during the stand connection period should not be less than the discharging capacity during the normal drilling process of the stand; adjusting the power grid capacity can change the charging and discharging power of the energy storage battery, and balance the charging and discharging capacity of the energy storage battery; determining the power grid capacity with the shortest stand connection time parameter can ensure that the power grid capacity meets the normal drilling operation requirements of all stands;

[0049] Step 6, calculate the energy storage battery capacity And the maximum charging and discharging power ;

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

[0051] ;

[0052] The calculation formula of the maximum charging and discharging power of the energy storage battery is:

[0053] ;

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

[0055] It can be understood 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, which can be used to adjust the charging and discharging capacity difference of the energy storage battery;

[0056] If , , , , , , , .

[0057] The above embodiment is only one of the embodiments of the present application, and is not a limitation to the protection scope of the present application. Any change made on the basis of the design principles of the present application and non-creative labor shall belong to the protection scope of the present application.

Claims

1. A method for configuring oil and gas drilling power grids and energy storage batteries for coordinated power supply, considering charge and discharge balance, characterized in that: The method specifically includes: 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 ; in, The support column number is for normal drilling conditions; Step 2, for each root... Perform Kalman filtering and calculate the average power after filtering. and standard deviation ; Step 3, confirm and The root number corresponding to the maximum sum and according to Determine the corresponding number of wells to be drilled, N; Step 4: Calculate the average time for connecting the drilling rig under normal drilling conditions when the number of drilling operations is N. and standard deviation and average power during the rooting period ; Step 5: Determine the grid capacity ; The power grid capacity This represents the maximum power grid capacity required for each vertical shaft under normal drilling conditions during N-stage drilling. The required power grid capacity for each support shaft during drilling (N) It should meet the following requirements: ； in, To establish roots Under normal drilling conditions, the actual power exceeds The cumulative power consumption at that time; The minimum power factor required by the power grid; This refers to the response lag time of the energy storage battery system. 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. Step 6, Calculate 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: ； in, This provides the emergency power required by the energy storage battery in the event of a sudden power outage. This represents the maximum power output under normal drilling conditions from the selected real drilling operation data.

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