A Battery Charging and Discharging Scheduling Strategy for Oil and Gas Drilling Operations

Abstract

This invention discloses a battery charging and discharging scheduling strategy for oil and gas drilling operations, belonging to the field of energy storage and charging technology. It primarily addresses the issue of coordinated and safe power supply between the power grid and energy storage batteries during oil and gas drilling operations under grid derating conditions. This scheduling strategy relies on an existing field energy management system. Based on the peak power conditions and power surge rates observed during oil and gas drilling operations, it dynamically adjusts the discharge threshold of the energy storage batteries. Through a combination of active scheduling and power following, it controls the charging and discharging of the energy storage batteries, achieving comprehensive management of coordinated power supply between the power grid and energy storage batteries for oil and gas drilling. This not only ensures the safety of power supply for oil and gas drilling operations under grid derating conditions but also improves grid capacity utilization, increases scheduling accuracy, and reduces oil and gas resource development costs.

Description

Technical Field

[0001] This invention belongs to the field of energy storage and charging technology, specifically, it relates to an energy storage battery charging and discharging scheduling strategy for oil and gas drilling operations. Background Technology

[0002] Promoting the shift to an "electricity (gas) instead of oil" energy supply model in oil and gas drilling is crucial for energy conservation and emission reduction in oil and gas resource development, aligning with the national "dual-carbon" strategy. Under the current grid-based energy supply model, grid capacity design is related to the peak power of oil and gas drilling. In non-downhole accident conditions, the power consumption is highest when the mud pump and top drive are operating simultaneously with the winch lifting operation. However, under most other conditions, the power demand of the drilling rig system is relatively low. Therefore, the utilization rate of grid capacity remains low for extended periods, hindering efforts to reduce the cost of oil and gas resource development.

[0003] The "peak shaving and valley filling" mechanism of electrochemical energy storage batteries can effectively reduce the demand on grid capacity from peak power during oil and gas drilling operations, ensuring the safety of energy supply for oil and gas drilling under grid derating conditions and reducing grid infrastructure costs. However, existing energy storage batteries used in oil and gas drilling control charging and discharging using a combination of fixed thresholds and power following methods. This approach fails to consider the impact of the start-up, shutdown, and operating patterns of major energy-consuming equipment on the power demand of drilling operations, making it difficult to effectively integrate battery charging and discharging with drilling conditions. This results in low scheduling accuracy and poor battery utilization. Therefore, a new energy storage battery charging and discharging scheduling strategy for oil and gas drilling operations is urgently needed. This strategy should combine the start-up and shutdown patterns of major energy-consuming equipment under different drilling conditions, rationally adjust the battery discharge threshold, and rationally schedule battery charging and discharging through a combination of active scheduling and power following to ensure energy supply safety under grid derating conditions and improve scheduling accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a charging and discharging scheduling strategy for energy storage batteries for oil and gas drilling operations, thereby solving the above-mentioned problems and technical requirements. The technical solution of this invention is as follows:

[0005] A battery charging and discharging scheduling strategy for oil and gas drilling operations;

[0006] The scheduling strategy relies on an existing energy management system on site.

[0007] The scheduling strategy includes the following steps:

[0008] Step 1: Update the characteristic power and characteristic power change rate based on historical power consumption data of drilling operations;

[0009] The characteristic power and the rate of change of characteristic power specifically include:

[0010] The maximum power increment ΔP when the mud pump is turned on and the winch is raised.max (i) and the maximum rate of change of power

[0011] Maximum power P when mud pump is off and winch is hoisting 上提 (i) and the maximum rate of change of power

[0012] Maximum power P when mud pump is off and winch is lowered 下放 (i) and the maximum rate of change of power

[0013] Where i is the root number;

[0014] Step 2: Dynamically adjust the power threshold corresponding to the discharge of the energy storage battery under different drilling operation conditions;

[0015] The energy storage battery discharge threshold includes:

[0016] When the mud pump is turned on and the winch is raised, the energy storage battery discharge threshold

[0017] When the mud pump is shut down and the winch is raised, the energy storage battery discharge threshold

[0018] When the mud pump is shut down and the winch is lowered, the energy storage battery discharge threshold is:

[0019] Under other operating conditions, the energy storage battery discharge threshold is 1400kW;

[0020] Among them, P 网 To build up capacity for the power grid;

[0021] Step 3: Obtain the real-time total power consumption P of oil and gas drilling operations at the current moment. 总 ;

[0022] Step 4: Based on the total power consumption P 总 The characteristics of mud pump start-up and shutdown and the operating pattern of winch are used to determine whether the energy storage battery is discharging, and the corresponding discharge power is calculated.

[0023] Step 5: If the energy storage battery does not discharge, then based on the total power consumption P... 总 The remaining capacity ΔQ of the energy storage battery is used to determine whether the energy storage battery is being charged, and the corresponding charging power is calculated.

[0024] Furthermore, in step 1, the characteristic power and the rate of change of characteristic power are initially assigned values ​​to different drilling rig models based on field experience during the initial drilling phase, ΔP. max (1) The range is 50-150kW. The range is 20-60 kW / s, P 上提(1) The range is 400-600kW. The range is 50-150 kW / s, P 下放 (1) The range is 300-500kW. The range is 50-150kW / s.

[0025] Furthermore, in step 1, the characteristic power and the rate of change of characteristic power are obtained by taking the maximum value of the historical power consumption of the first two foundations after drilling begins, i.e., ΔP. max (i)=max[ΔP max (i-2),ΔP max (i-1)], P 上提 (i)=max[P 上提 (i-2),P 上提 (i-1)], P 下放 (i)=max[P 下放 (i-2),P 下放 (i-1)],

[0026] Furthermore, step 4 specifically includes the following sub-steps:

[0027] Step 41: When the mud pump is shut down, perform the following judgments and calculations:

[0028] Step 411, if the winch is raised and P 总 ≥900kW, energy storage battery discharge power is P 放 =max[(P 上提 (i)-P 阈2 (i)),(P 总 -P 阈2 (i)),0]kW;

[0029] Step 412, if the winch is lowered and P 总 ≥900kW, energy storage battery discharge power is P 放 =max[(P 下放 (i)-P 阈3 (i)),(P 总 -P 阈3 (i)),0]kW;

[0030] Step 413: If the winch is neither raised nor lowered, P 总 ≥1400kW, energy storage battery discharge power is P 放 =(P 总 -1400)kW;

[0031] Step 414: Under other operating conditions, the energy storage battery does not discharge;

[0032] Step 42: When the mud pump is started, perform the following judgments and calculations:

[0033] Step 421: If the winch does not lift and P 总 ≥1400kW, energy storage battery discharge power is P 放 =(P 总 -1400)kW;

[0034] Step 422: If the winch is raised and 900kW≤P 总 <P 阈1 (i) The discharge power of the energy storage battery is P 放 =max[(P 总 +ΔP max (i)-P 阈1 (i)),0]kW;

[0035] Step 423, if the winch is raised and P 总 ≥P 阈1 (i) The discharge power of the energy storage battery is

[0036] Step 424: Under other operating conditions, the energy storage battery does not discharge.

[0037] Furthermore, step 5 performs the following judgments and calculations:

[0038] Step 51, if P 总 If the power storage capacity is less than 700kW and the remaining capacity of the energy storage battery ΔQ is greater than or equal to 80%, the energy storage battery does not need to be charged.

[0039] Step 52, if P 总 With a power consumption of <700kW and a remaining battery capacity ΔQ < 80%, the battery is being charged with a charging power of P. 充 =(P 网 -P 总 -200)kW;

[0040] Step 53: If 700kW≤P 总 <900kW, the energy storage battery is not charged.

[0041] The above-described solution of the present invention has at least the following beneficial effects:

[0042] (1) The hoisting of the winch during oil and gas drilling operations is the main cause of power surges. The start and stop of the mud pump changes the overall peak power consumption. Based on a comprehensive analysis of the power surges during oil and gas drilling operations and the start and stop of the mud pump and the operation of the winch, this scheduling strategy proposes to make judgments and decisions on the charging and discharging of energy storage batteries by combining the easy-to-detect characteristics of the start and stop of the mud pump and the operation of the winch. It is independent of any well type, well depth and other parameters, and does not require accurate identification of drilling operation conditions. It has universal applicability.

[0043] (2) This scheduling strategy combines historical data from drilling operations to dynamically adjust the discharge threshold of energy storage batteries under different operating conditions, forming a combination of fixed thresholds and dynamic thresholds throughout the drilling cycle. This can ensure more accurate energy storage battery discharge decisions, improve scheduling accuracy, and extend the service life of energy storage batteries.

[0044] (3) In response to the problem of power fluctuations in drilling operations caused by winch operation, in addition to power following scheduling, this scheduling strategy also combines historical data of drilling operations to enable the energy storage battery to discharge in advance when the winch is running. This can avoid the grid impact caused by the energy storage battery not responding in time due to the excessively fast power fluctuation rate, and ensure the safety of energy supply for drilling operations while improving grid utilization. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of a battery charging and discharging scheduling strategy for oil and gas drilling operations, provided by an embodiment of the present invention.

[0046] Figure 2 This is a typical power consumption for oil and gas drilling operations under certain working conditions, provided by an embodiment of the present invention.

[0047] Figure 3 This is an embodiment of the present invention providing a typical working condition for the change rate of total electrical power consumption in oil and gas drilling operations.

[0048] Figure 4 This is an embodiment of the present invention providing a typical operating condition for the distribution of power output between the power grid and the energy storage battery.

[0049] Figure 5 This refers to the grid utilization rate before and after the use of the energy storage battery provided in the embodiments of the present invention. Detailed Implementation

[0050] 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.

[0051] This embodiment corresponds to a 50DB drilling rig, a horizontal well, and a power grid capacity of 1600kVA. The energy management system collects data every 1 second. Based on field experience, the initial values ​​for the characteristic power and characteristic power change rate of the 50DB drilling rig are: ΔP max (1) = 100kW, P 上提 (1) = 500kW P 下放 (1) = 400kW

[0052] See Figure 1 This is a schematic diagram illustrating a battery charging and discharging scheduling strategy for oil and gas drilling operations, provided as an embodiment of the present invention. Figure 1 As shown, the scheduling strategy includes the following steps:

[0053] Step 1: Update the characteristic power and characteristic power change rate based on historical power consumption data of drilling operations;

[0054] The characteristic power and the rate of change of characteristic power specifically include:

[0055] The maximum power increment ΔP when the mud pump is turned on and the winch is raised. max (i) and the maximum rate of change of power

[0056] Maximum power P when mud pump is off and winch is hoisting 上提 (i) and the maximum rate of change of power

[0057] Maximum power P when mud pump is off and winch is lowered 下放 (i) and the maximum rate of change of power

[0058] Where i is the root number;

[0059] Step 2: Dynamically adjust the power threshold corresponding to the discharge of the energy storage battery under different drilling operation conditions;

[0060] The energy storage battery discharge threshold includes:

[0061] When the mud pump is turned on and the winch is raised, the energy storage battery discharge threshold

[0062] When the mud pump is shut down and the winch is raised, the energy storage battery discharge threshold

[0063] When the mud pump is shut down and the winch is lowered, the energy storage battery discharge threshold

[0064] Under other operating conditions, the energy storage battery discharge threshold is 1400kW;

[0065] Understandably, if Then P 阈1 (172)=1428kW, P 阈2 (172)=1368kW, P 阈3 (172) = 1450kW;

[0066] Step 3: Obtain the real-time total power consumption P of oil and gas drilling operations at the current moment. 总 ;

[0067] Step 4: Based on the total power consumption P 总 The characteristics of mud pump start-up and shutdown and the operating pattern of winch are used to determine whether the energy storage battery is discharging, and the corresponding discharge power is calculated.

[0068] Step 5: If the energy storage battery does not discharge, then based on the total power consumption P... 总 The remaining capacity ΔQ of the energy storage battery is used to determine whether the energy storage battery is being charged, and the corresponding charging power is calculated.

[0069] In a preferred embodiment of the present invention, the characteristic power and the rate of change of characteristic power in step 1 above are initially assigned the following values ​​to the 50dB drilling rig based on field experience during the initial drilling: ΔP max (1) = 100kW, P 上提 (1) = 500kW P 下放 (1) = 400kW

[0070] In a preferred embodiment of the present invention, the characteristic power and the rate of change of characteristic power in step 1 above are obtained by taking the maximum value of the historical power consumption of the first two foundations after drilling begins, i.e., ΔP. max (i)=max[ΔP max (i-2),ΔP max (i-1)], P 上提 (i)=max[P 上提 (i-2),P 上提 (i-1)], P 下放 (i)=max[P 下放 (i-2),P 下放 (i-1)],

[0071] It is understandable that if ΔP max (130) = 480kW ΔPmax (131) = 540kW, Then ΔP max (132) = 540kW

[0072] If P 上提 (129) = 960kW, P 上提 (130) = 800kW Then P 上提 (131) = 960kW,

[0073] If P 下放 (152) = 840kW P 下放 (153) = 865kW Then P 下放 (154) = 865kW

[0074] In a preferred embodiment of the present invention, step 4 specifically includes:

[0075] Step 41: When the mud pump is shut down, perform the following judgments and calculations:

[0076] Step 411, if the winch is raised and P 总 ≥900kW, energy storage battery discharge power is P 放 =max[(P 上提 (i)-P 阈2 (i)),(P 总 -P 阈2 (i)),0]kW;

[0077] Understandably, if the mud pump is shut down, the winch is raised, and 900kW≤P 总 ≤P 阈2 (i) The energy storage battery is based on historical data P 上提 (i) Determine whether it is necessary to discharge in advance when the real-time total power has not reached the discharge threshold, so as to avoid grid impact caused by excessively rapid power change rate;

[0078] If the mud pump is shut off, the winch will be raised, P 阈2 (170)=1428kW, P 上提 (170) = 1120kW, P 总 When the power is 960kW, the discharge power P of the energy storage battery is... 放 =0kW;

[0079] If the mud pump is shut off, the winch will be raised, P 阈2 (170)=1428kW, P 上提(170) = 1500kW, P 总 When the power is 1360kW, the energy storage battery discharges prematurely, with a discharge power P. 放 =72kW.

[0080] Step 412, if the winch is lowered and P 总 ≥900kW, energy storage battery discharge power is P 放 =max[(P 下放 (i)-P 阈3 (i)),(P 总 -P 阈3 (i)),0]kW;

[0081] Understandably, if the mud pump is shut down and the winch is lowered, P 阈3 (120) = 1500kW, P 下放 (120)=790kW, P 总 When the power is 700kW, the discharge power P of the energy storage battery is... 放 =0kW.

[0082] Step 413: If the winch is neither raised nor lowered, P 总 ≥1400kW, energy storage battery discharge power is P 放 =(P 总 -1400)kW;

[0083] Understandably, if the mud pump is shut down and the winch is neither raised nor lowered, P 总 =600kW, then the energy storage discharge power is P 放 =0kW;

[0084] Step 414: Under other operating conditions, the energy storage battery does not discharge;

[0085] Step 42: When the mud pump is started, perform the following judgments and calculations:

[0086] Step 421: If the winch does not lift, and P 总 ≥1400kW, energy storage battery discharge, discharge power is P 放 =(P 总 -1400)kW;

[0087] Understandably, if the mud pump is turned on but the winch is not raised, P 总 =1580kW, then the energy storage battery discharge power P 放 =180kW;

[0088] Step 422: If the winch is lifted, and 900kW≤P 总 <P 阈1 (i) The energy storage battery discharges, with a discharge power of P.放 =max[(P 总 +ΔP max (i)-P 阈1 (i)),0]kW;

[0089] Understandably, if the mud pump is turned on and the winch is raised, the energy storage battery can discharge before the total power consumption reaches the threshold; if P 阈1 (120)=1390kW, ΔP max (120)=510kW, P 总 =960kW, energy storage battery discharge power P 放 =60kW;

[0090] Step 423: If the winch is lifted, P 总 ≥P 阈1 (i) The energy storage battery discharges, with a discharge power of...

[0091] Understandably, if the mud pump is turned on and the winch is raised, P 阈1 (120) = 1390kW, P 总 =1480kW, energy storage battery discharge, discharge power is P 放 =110kW;

[0092] Step 424: Under other operating conditions, the energy storage battery does not discharge.

[0093] In a preferred embodiment of the present invention, step 5 specifically includes:

[0094] Step 51, if P 总 If the power storage capacity is less than 700kW and the remaining capacity of the energy storage battery ΔQ is greater than or equal to 80%, the energy storage battery does not need to be charged.

[0095] It is understandable that if P 总 =480kW, ΔQ=88%; the energy storage battery charging power is P 充 =0kW;

[0096] Step 52, if P 总 With a power consumption of <700kW and a remaining battery capacity ΔQ < 80%, the battery is being charged with a charging power of P. 充 =(1400-P) 总 )kW;

[0097] It is understandable that if P 总 =480kW, ΔQ=71%, energy storage battery charging, charging power P 充 =920kW;

[0098] Step 53: If 700kW≤P 总 <900kW, the energy storage battery is not charged.

[0099] See Figure 2 and Figure 3 This invention provides a typical operating condition for oil and gas drilling operations, including the total power consumption and power change rate. The scheduling strategy provided by this invention is used to obtain the power allocation between the power grid and the energy storage battery, with the allocation result as follows: Figure 4 As shown. The energy storage battery discharge ensures that the grid output power remains below 1400kW. In this embodiment, the average energy storage battery consumption is 1.2 kWh per well as it is raised. For a well to 5000 meters, the total energy consumption is approximately 220 kWh. Using a battery energy storage system with a rated power of 1000kW, a rated capacity of 1000kWh, and lithium iron phosphate cells, ensures that the energy consumption during the entire drilling process is approximately 20% of the energy storage battery capacity, and the energy storage battery does not need to be recharged midway.

[0100] See Figure 5 The grid utilization rate before and after using the energy storage battery provided in this embodiment of the invention is such that, compared with the original 2500kVA capacity grid, the 1600kVA capacity grid can increase the average grid utilization rate by more than 50%.

[0101] 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 battery charging and discharging scheduling strategy for oil and gas drilling operations, relying on existing energy management systems on-site, characterized in that: The scheduling strategy includes the following steps: Step 1: Update the characteristic power and characteristic power change rate based on historical power consumption data of drilling operations; The characteristic power and the rate of change of characteristic power specifically include: The maximum power increment ΔP when the mud pump is turned on and the winch is raised. max (i) and the maximum rate of change of power Maximum power P when mud pump is off and winch is hoisting 上提 (i) and the maximum rate of change of power Maximum power P when mud pump is off and winch is lowered 下放 (i) and the maximum rate of change of power The characteristic power and the rate of change of characteristic power are initially assigned values ​​to different drilling rig models based on field experience during the initial drilling phase, ΔP. max (1) The range is 50-150kW. The range is 20-60 kW / s, P 上提 (1) The range is 400-600kW. The range is 50-150 kW / s, P 下放 (1) The range is 300-500kW. The range is 50-150 kW / s; The characteristic power and the rate of change of characteristic power are obtained after drilling begins by taking the maximum value of the historical power consumption of the first two foundations, i.e., ΔP. max (i)=max[ΔP max (i-2),ΔP max (i-1)], P 上提 (i)=max[P 上提 (i-2),P 上提 (i-1)], P 下放 (i)=max[P 下放 (i-2),P 下放 (i-1)], Where i is the root number; Step 2: Dynamically adjust the discharge power threshold of the energy storage battery under different drilling operation conditions; The energy storage battery discharge power threshold includes: When the mud pump is turned on and the winch is raised, the energy storage battery discharge threshold When the mud pump is shut down and the winch is raised, the energy storage battery discharge threshold When the mud pump is shut down and the winch is lowered, the energy storage battery discharge threshold Under other operating conditions, the energy storage battery discharge threshold is 1400kW; Among them, P 网 To build up capacity for the power grid; Step 3: Obtain the real-time total power consumption P of oil and gas drilling operations at the current moment. 总 ; Step 4: Based on the total power consumption P 总 The process of determining whether the energy storage battery is discharging based on the start-up and shutdown characteristics of the mud pump and the operating pattern of the winch, and calculating the corresponding discharge power, includes the following sub-steps: Step 41: When the mud pump is shut down, perform the following judgments and calculations: Step 411, if the winch is raised and P 总 ≥900kW, energy storage battery discharge power is P 放 =max[(P 上提 (i)-P 阈2 (i)),(P 总 -P 阈2 (i)),0]kW; Step 412, if the winch is lowered and P 总 ≥900kW, energy storage battery discharge power is P 放 =max[(P 下放 (i)-P 阈3 (i)),(P 总 -P 阈3 (i)),0]kW; Step 413: If the winch is neither raised nor lowered, P 总 ≥1400kW, energy storage battery discharge power is P 放 =(P 总 -1400)kW; Step 414: Under other operating conditions, the energy storage battery does not discharge; Step 42: When the mud pump is started, perform the following judgments and calculations: Step 421: If the winch does not lift and P 总 ≥1400kW, energy storage battery discharge power is P 放 =(P 总 -1400)kW; Step 422: If the winch is raised and 900kW≤P 总 <P 阈1 (i) The discharge power of the energy storage battery is P 放 =max[(P 总 +ΔPmax(i)-P 阈1 (i)),0]kW; Step 423, if the winch is raised and P 总 ≥P 阈1 (i) The discharge power of the energy storage battery is Step 424: Under other operating conditions, the energy storage battery does not discharge; Step 5: If the energy storage battery does not discharge, then based on the total power consumption P... 总 The remaining capacity ΔQ of the energy storage battery is used to determine whether the energy storage battery is being charged, and the corresponding charging power is calculated.

2. The energy storage battery charging and discharging scheduling strategy for oil and gas drilling operations according to claim 1, characterized in that: Step 5 performs the following judgments and calculations: Step 51, if P 总 If the power storage capacity is less than 700kW and the remaining capacity of the energy storage battery ΔQ is greater than or equal to 80%, the energy storage battery does not need to be charged. Step 52, if P 总 With a power consumption of <700kW and a remaining battery capacity ΔQ < 80%, the battery is being charged with a charging power of P. 充 =(P 网 -P 总 -200)kW; Step 53: If 700kW≤P 总 <900kW, the energy storage battery is not charged.

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