A kind of energy storage battery scheduling strategy for normal drilling operation of oil and gas drilling

Abstract

The application discloses a kind of energy storage battery scheduling strategies for oil and gas drilling normal drilling operation, belong to the technical field of storage and charging, mainly solve in the normal drilling operation of oil and gas drilling, the energy storage battery imbalance of existence in the energy supply of gas generator and energy storage battery, unreasonable problem of gas generator opening time.The scheduling strategy is combined with winch operating state, energy storage battery estimated discharge capacity and energy storage battery estimated chargeable capacity, dynamically adjusts the number of gas generator opening, controls the sustained discharge capacity of energy storage battery, not only improves the gas-electric conversion efficiency of gas generator, but also guarantees the balance of energy storage battery charge and discharge, ensures the safety of gas generator and energy storage battery collaborative energy supply in the normal drilling operation of oil and gas drilling.

Description

Technical Field

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

[0002] In the gas generator power supply mode, to address the issues of high peak power and large power fluctuations in oil and gas drilling operations, electrochemical energy storage has been proposed to work in conjunction with gas generators to supply power to oil and gas drilling operations. Based on the "peak shaving and valley filling" mechanism of electrochemical energy storage batteries, the load rate fluctuation of gas generators is reduced, and the gas-to-electricity conversion efficiency of gas generators is improved.

[0003] Normal drilling operations constitute the main process flow of oil and gas drilling, accounting for 40%-60% of the total drilling time. During normal drilling operations, the main energy-consuming equipment of the drilling rig system, such as the mud pump, top drive, and winch, all need to be started, resulting in a higher average power consumption compared to other processes. Under normal drilling conditions, the discharge of the energy storage battery typically occurs for two reasons: 1) Formation factors cause a significant increase in mud pump power, with a slow rate of power change, but the energy storage battery discharge time can be as long as hours; 2) Fine-tuning the winch to prevent the drill string from getting stuck causes a sharp increase in power consumption, with a rapid rate of power change, but the energy storage battery discharge time is short, ranging from seconds to minutes.

[0004] However, existing coordinated power supply scheduling strategies for gas generators and energy storage batteries for normal oil and gas drilling operations mainly adjust the discharge status of energy storage batteries and the number of gas generators turned on based on the load rate and power consumption rate of gas generators. These strategies do not take into account the operating status of the main energy-consuming equipment under normal drilling conditions. The problems include: 1) When the power of the mud pump increases significantly, the energy storage battery discharges for too long and discharges too much, while the charging amount is too small during the connection period. This leads to an imbalance between charging and discharging of the energy storage battery for a long time, affecting the continuous coordinated power supply effect of gas generators and energy storage batteries. 2) Adjusting the stop discharge time of energy storage batteries by increasing the number of gas generators turned on is unreasonable. As a result, the normal drilling operation immediately enters the connection mode after the gas generator is started, which affects the improvement of the average load rate of the gas generator. Therefore, there is an urgent need for an energy storage battery scheduling strategy for normal oil and gas drilling operations. This strategy should combine the winch operating status, the estimated discharge amount of the energy storage battery, and the estimated rechargeable amount of the energy storage battery to reasonably adjust the number of gas generators turned on during normal drilling operations, control the continuous discharge amount of the energy storage battery, improve the gas-to-electricity conversion efficiency of the gas generator, ensure the charging and discharging balance of the energy storage battery, and ensure the safe coordinated power supply of gas generators and energy storage batteries in oil and gas drilling operations. Summary of the Invention

[0005] The purpose of this invention is to provide an energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling, solving the above-mentioned problems and technical requirements. The technical solution of this invention is as follows:

[0006] A battery scheduling strategy for normal drilling operations in oil and gas drilling;

[0007] The scheduling strategy relies on an existing on-site energy management system hardware for implementation.

[0008] The scheduling strategy adjusts the number of gas generators turned on based on the winch operating status, the estimated discharge amount of the energy storage battery, and the estimated rechargeable amount of the energy storage battery, thereby controlling the continuous discharge amount of the energy storage battery.

[0009] The operating status of the winch is obtained by sensors installed on the winch drum shaft;

[0010] The scheduling strategy includes the following steps:

[0011] Step 1: Based on the historical rechargeable data of the energy storage battery during the connection of the support shaft, update the estimated rechargeable capacity of the energy storage battery after the current support shaft drilling is completed. ;

[0012] Step 2: Obtain total power consumption data Cumulative discharge data of energy storage batteries Currently, Ligen has drilled deep into the data. ;

[0013] Step 3: Based on the average drilling speed Calculate the remaining drilling time for the current foundation. ;

[0014] Step 4: Determine if the energy storage battery is discharging and calculate the discharge power. To determine the cause of the energy storage battery discharge;

[0015] Step 5: If the energy storage battery discharges, estimate the discharge amount based on the cause of the discharge. and estimated rechargeable capacity Calculate the number of newly activated gas generators. ;

[0016] in, Number the root.

[0017] Furthermore, in step 1, the estimated rechargeable capacity of the energy storage battery... Based on the actual rechargeable capacity of the energy storage battery during the first two connection periods. and get, For new drilling operations, the estimated chargeable capacity of the energy storage battery during the stand-up period after the first stand-up drilling is completed. = , Initial values ​​are given based on field experience, with a range of 40kWh-80kWh.

[0018] Furthermore, the average drilling speed in step 3 The remaining drilling time for the current support shaft is calculated based on the drilling depth over the past 3 minutes. From the current drilling depth and average drilling speed Calculation yielded:

[0019]

[0020] in: The length of a single root.

[0021] Furthermore, step 4 specifically includes the following sub-steps:

[0022] Step 41: If the winch is raised, the gas generator load rate... The energy storage battery discharge power is The discharge of the energy storage battery was caused by a sudden power change due to the winch lifting.

[0023] Step 42: If the winch does not lift, the gas generator load rate... The energy storage battery discharge power is The discharge of the energy storage battery was caused by a significant increase in the power of the mud pump;

[0024] Step 43, if the gas generator load rate The energy storage battery does not discharge;

[0025] in, This represents the number of gas generators that were running at the time of data collection. This refers to the rated power of a single gas generator.

[0026] Furthermore, step 5 specifically includes the following sub-steps:

[0027] Step 51: If the discharge of the energy storage battery is caused by a sudden power change due to the winch lifting, the number of gas generators turned on remains unchanged. The energy storage battery continues to discharge;

[0028] Step 52: If the discharge of the energy storage battery is caused by a significant increase in the power of the mud pump, and The number of gas generators turned on remains unchanged. The energy storage battery continues to discharge;

[0029] Step 53: If the discharge of the energy storage battery is caused by a significant increase in the power of the mud pump, and Then when the actual discharge amount of the energy storage battery If the number of gas generators turned on is increased, the energy storage battery will stop discharging; otherwise, if the number of gas generators turned on remains unchanged, the energy storage battery will continue to discharge.

[0030] Furthermore, in steps 52 and 53, the estimated discharge capacity of the energy storage battery... The amount of energy stored in the battery that has been discharged Average discharge power of the energy storage battery in the past minute and remaining drilling time of the current foundation. The calculation is as follows:

[0031]

[0032] in, This represents the average discharge power of the energy storage battery over the past minute.

[0033] Furthermore, if in step 53 it is necessary to increase the number of gas generators activated and the energy storage battery stops discharging, then the number of gas generators activated will be increased. Should meet And the gas generator has the highest load rate.

[0034] The above-described solution of the present invention has at least the following beneficial effects:

[0035] (1) This scheduling strategy combines the operating rules of mud pumps, top drives and winches under normal drilling operation scenarios in oil and gas drilling. Based on clarifying the causes of energy storage battery discharge, it takes a single stand as a cycle and the chargeable amount of adjacent stands as the basis. This ensures that the energy storage battery can be utilized to the maximum extent to improve the gas-to-electric conversion efficiency of the gas generator, and also ensures the balance of charging and discharging of the energy storage battery, so as to achieve safe and coordinated power supply of gas generators and energy storage batteries in oil and gas drilling operations.

[0036] (2) This scheduling strategy calculates the remaining drilling time of the foundation every 3 minutes and the average discharge power every 1 minute. This ensures that the estimated discharge data of the energy storage battery is updated in a timely manner during the entire foundation drilling process, thereby improving the scheduling accuracy.

[0037] (3) When the power of the mud pump increases significantly and the energy storage battery discharges, the number of gas generators that are added is increased when the actual discharge of the energy storage battery is 80% of the estimated chargeable amount. The remaining power of the energy storage battery can still be used to cope with the power surge when the winch is lifted, ensuring that the energy storage battery is not affected by the power surge. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of an energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling, provided by an embodiment of the present invention.

[0039] Figure 2 This is a schematic diagram of data acquisition and control for an energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling, provided by an embodiment of the present invention.

[0040] Figure 3 This refers to the total power consumption of a single drilling rig under normal drilling conditions in oil and gas drilling, as provided in the embodiments of the present invention.

[0041] Figure 4 The embodiments of the present invention provide the output power distribution results of the gas generator and the energy storage battery. Detailed Implementation

[0042] 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.

[0043] The drilling rig type corresponding to this embodiment is 50DB, with a single riser length of 27m. It is powered by gas generators, with each drilling rig equipped with 8 gas generators, each with a rated power of [missing information]. The power is 300kW, and drilling operations will take place in the spring. Based on field experience, The value is 40kWh.

[0044] See Figure 1 This is a schematic diagram of an energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling, provided as an embodiment of the present invention. The scheduling strategy includes the following steps:

[0045] Step 1: Based on the historical rechargeable data of the energy storage battery during the connection of the support shaft, update the estimated rechargeable capacity of the energy storage battery after the current support shaft drilling is completed. ;

[0046] Step 2: Obtain total power consumption data Cumulative discharge data of energy storage batteries Currently, Ligen has drilled deep into the data. ;

[0047] Step 3: Based on the average drilling speed Calculate the remaining drilling time for the current foundation. ;

[0048] Step 4: Determine if the energy storage battery is discharging and calculate the discharge power. To determine the cause of the energy storage battery discharge;

[0049] Step 5: If the energy storage battery discharges, estimate the discharge amount based on the cause of the discharge. and estimated rechargeable capacity Calculate the number of newly activated gas generators. ;

[0050] in, Number the root.

[0051] In this embodiment of the invention, step 1 provides the estimated rechargeable capacity data for the energy storage battery, serving as a crucial reference for determining the number of additional gas generators to be activated. Step 2 is used to acquire real-time data from oil and gas drilling operations. Step 3 continuously updates the average drilling speed and remaining drilling time based on the real-time data to ensure more accurate calculations of the estimated discharge capacity data for the energy storage battery. Step 4 calculates the discharge power of the energy storage battery and, in conjunction with the winch operating status, determines the cause of the battery discharge. Step 5 determines whether an additional number of gas generators need to be activated and calculates the specific value for the additional activations.

[0052] In a preferred embodiment of the present invention, the estimated rechargeable capacity of the energy storage battery in step 1 above... Based on the actual rechargeable capacity of the energy storage battery during the first two connection periods. and get, For new drilling operations, the estimated chargeable capacity of the energy storage battery during the stand-up period after the first stand-up drilling is completed. = =40kWh;

[0053] Understandably, during the drilling process from the start to the end of each rootstock, Keep the constant unchanged; if , ,but =50kWh.

[0054] In a preferred embodiment of the present invention, the average drilling speed in step 3 above The remaining drilling time for the current support shaft is calculated based on the drilling depth over the past 3 minutes. From the current drilling depth and average drilling speed Calculation yielded:

[0055]

[0056] Understandably, if the drilling depth in the last 3 minutes is 0.9m, then the depth to which the foundation has been drilled is... 16m, then the average drilling speed Remaining drilling time .

[0057] In a preferred embodiment of the present invention, step 4 specifically includes the following sub-steps:

[0058] Step 41: If the winch is raised, the gas generator load rate... The energy storage battery discharge power is The discharge of the energy storage battery was caused by a sudden power change due to the winch lifting.

[0059] Step 42: If the winch does not lift, the gas generator load rate... The energy storage battery discharge power is The discharge of the energy storage battery was caused by a significant increase in the power of the mud pump;

[0060] Step 43, if the gas generator load rate The energy storage battery does not discharge;

[0061] in, The number of gas generators that were turned on at the time of data collection;

[0062] Understandably, the gas generator load rate At this time, the energy storage battery first discharges, and then the cause of the energy storage battery discharge is determined by combining the winch operating status data; the winch operating status is obtained by sensors installed on the winch drum shaft.

[0063] like , =1020kW, then =120kW; if , =860kW, then =0kW.

[0064] In a preferred embodiment of the present invention, step 5 specifically includes the following sub-steps:

[0065] Step 51: If the discharge of the energy storage battery is caused by a sudden power change due to the winch lifting, the number of gas generators turned on remains unchanged. The energy storage battery continues to discharge;

[0066] Step 52: If the discharge of the energy storage battery is caused by a significant increase in the power of the mud pump, and The number of gas generators turned on remains unchanged. The energy storage battery continues to discharge;

[0067] Step 53: If the discharge of the energy storage battery is caused by a significant increase in the power of the mud pump, and Then when the actual discharge amount of the energy storage battery If the number of gas generators turned on is increased, the energy storage battery will stop discharging; otherwise, if the number of gas generators turned on remains unchanged, the energy storage battery will continue to discharge.

[0068] Estimated discharge capacity of the energy storage battery in steps 52 and 53 The amount of energy stored in the battery that has been discharged Average discharge power of the energy storage battery in the past minute and remaining drilling time of the current foundation. The calculation is as follows:

[0069]

[0070] in, This represents the average discharge power of the energy storage battery over the past minute.

[0071] Understandably, if the energy storage battery discharge is caused by the winch lifting, the energy storage battery will continue to discharge until the gas generator load rate is less than 75%.

[0072] If the discharge of the energy storage battery is caused by a significant increase in the power of the mud pump, =50kWh , =0.5h, =20kW, then =30kWh, the number of gas generators operating remains unchanged, and the energy storage battery continues to discharge; if =50kWh , =0.5h, =68kW, then =70kWh, in When the number of newly added gas generators is turned on, the energy storage battery stops discharging.

[0073] In a preferred embodiment of the present invention, if it is necessary to increase the number of gas generators started and stop the energy storage battery from discharging in step 53, then the number of gas generators started will be increased. Should meet And the gas generator has the highest load rate;

[0074] Understandably, this refers to the number of newly added gas generators that are turned on. The final load factor of the gas generator set should be ensured to be within the range of 0.5-0.75, and When multiple options are available, the value that maximizes the load rate of the gas generator should be selected.

[0075] If N=4, ,but Both 1 and 2 can keep the gas generator load rate within the range of 0.5-0.75. In this case, 1 or 2 should be selected. =1 ensures the gas generator has the highest load rate.

[0076] See Figure 2 This is a schematic diagram of data acquisition and control for an energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling, provided as an embodiment of the present invention.

[0077] See Figure 3 The total power consumption diagram for normal drilling operations of a single drilling rig in oil and gas drilling, provided as an embodiment of the present invention, utilizes the scheduling strategy proposed in this invention to obtain the power distribution between the gas generator and the energy storage battery. The distribution result is as follows: Figure 4 As shown. The discharge capacity of a single stand of the energy storage battery is approximately 17 kWh, and the rechargeable capacity of the energy storage battery during stand connection is 82 kWh. The energy storage battery can achieve a balance between charging and discharging.

[0078] 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 scheduling strategy for normal drilling operations in oil and gas drilling, characterized in that: The scheduling strategy includes the following steps: Step 1: Based on the historical rechargeable data of the energy storage battery during the connection of the support shaft, update the estimated rechargeable capacity E of the energy storage battery after the current support shaft drilling is completed. 预-充 (i); Step 2: Obtain total power consumption data P 总 Cumulative discharge data of energy storage batteries E 已-放 (i) Current drilling depth data H of the support root 钻 (i); Step 3: Based on the average drilling speed V 平均 Calculate the remaining drilling time t for the current foundation. 钻 (i); Step 4: Determine if the energy storage battery is discharging and calculate the discharge power P. 放 To determine the cause of the energy storage battery discharge, the specific reasons include: Step 41: If the winch is raised, the gas generator load rate... The energy storage battery discharge power is P 放 =P 总 -0.75*N*P 发 The discharge of the energy storage battery was caused by a sudden power change due to the winch lifting. Step 42: If the winch does not lift, the gas generator load rate... The energy storage battery discharge power is P 放 =P 总 -0.75*N*P 发 The discharge of the energy storage battery was caused by a significant increase in the power of the mud pump; Step 43, if the gas generator load rate The energy storage battery does not discharge; Step 5: If the energy storage battery discharges, estimate the discharge amount E based on the cause of the discharge. 预-放 (i) and estimated rechargeable capacity E 预-充 (i) Calculate the number of newly activated gas generators N 增 Specifically, it includes: Step 51: If the discharge of the energy storage battery is caused by a sudden power change due to the winch lifting, the number of gas generators turned on remains unchanged, N. 增 =0, the energy storage battery continues to discharge; Step 52, if the discharge of the energy storage battery is caused by a significant increase in the power of the mud pump, and E 预-放 (i)<1.2*E 预-充 (i) then the number of gas generators turned on remains unchanged, N 增 =0, the energy storage battery continues to discharge; Step 53: If the discharge of the energy storage battery is caused by a significant increase in the power of the mud pump, and E 预-放 (i)≥1.2*E 预-充 (i) then when the actual discharge amount E of the energy storage battery 实-放 (i)≥0.8*E 预-充 (i) Increase the number of gas generators turned on and the energy storage battery stops discharging; otherwise, the number of gas generators turned on remains unchanged and the energy storage battery continues to discharge. Where i is the root number, N is the number of gas generators that have been turned on at the time of data acquisition, and P 发 This refers to the rated power of a single gas generator.

2. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1, characterized in that: In step 1, the estimated rechargeable capacity E of the energy storage battery 预-充 (i) Based on the actual rechargeable capacity E of the energy storage battery during the first two connection times. 实-充 (i-2) and E 实-充 (i-1) is obtained. For new drilling operations, the estimated rechargeable capacity E of the energy storage battery during the stand-up period after the completion of the first stand-up drilling is [missing information]. 预-充 (1) = E 实-充 (0), E 实-充 (0) Initial values ​​are given based on field experience, with a range of 40kWh-80kWh.

3. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1, characterized in that: Average drilling speed V in step 3 平均 The remaining drilling time t for the current support shaft is calculated based on the drilling depth over the past 3 minutes. 钻 (i) The current drilling depth H of the support root 钻 (i) and average drilling speed V 平均 Calculation yielded: Among them, H 立根 The length of a single root.

4. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1, characterized in that: The estimated discharge capacity E of the energy storage battery in steps 52 and 53 预-放 (i) The discharged amount E of the energy storage battery 已-放 (i) Average discharge power of the energy storage battery in the past minute and remaining drilling time t of the current foundation 钻 (i) The calculation formula is as follows: E 预-放 (i)=E 已-放 (i)+P 平-放 *t 钻 (i) Among them, P 平-放 This represents the average discharge power of the energy storage battery over the past minute.

5. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1, characterized in that: If, in step 53, it is necessary to increase the number of gas generators activated and the energy storage battery stops discharging, then the additional number of gas generators activated is N. 增 It should satisfy 0.5*(N+N) 增 )*P 发 ≤P 总 ≤0.75*(N+N 增 )*P 发 And the gas generator has the highest load rate.

Images