Energy storage battery scheduling strategy for normal drilling operation of oil and gas drilling

Abstract

The invention discloses an energy storage battery scheduling strategy for normal drilling operation of oil and gas drilling, belongs to the technical field of storage and charging, and mainly solves the problems of unbalanced charging and discharging of an energy storage battery and unreasonable starting time of a gas power generator due to cooperative energy supply of the gas power generator and the energy storage battery under the working condition of normal drilling operation of oil and gas drilling. The scheduling strategy combines the operation state of the winch, the estimated discharge capacity of the energy storage battery and the estimated chargeable capacity of the energy storage battery, dynamically adjusts the starting number of the gas generators, controls the continuous discharge capacity of the energy storage battery, not only improves the gas-electricity conversion efficiency of the gas generators, but also guarantees the charge and discharge balance of the energy storage battery. And cooperative energy supply safety of the gas generator and the energy storage battery in normal drilling operation of oil and gas drilling is ensured.

Description

Technical Field

[0001] The present invention belongs to the field of storage and charging technology, and in particular relates to an energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling. Background Art

[0002] To address the high peak power and large power fluctuations associated with gas-fired generators, electrochemical energy storage has been proposed to work in tandem with gas-fired generators to provide energy for oil and gas drilling operations. This "peak shaving and valley filling" mechanism of electrochemical energy storage cells reduces fluctuations in gas-fired generator loads and improves the gas-to-electricity conversion efficiency of gas-fired generators.

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

[0004] However, the existing coordinated energy supply scheduling strategy for gas generators and energy storage batteries for normal drilling operations in oil and gas drilling mainly adjusts the discharge state of the energy storage battery and the number of gas generators turned on according to the load rate of the gas generator and the rate of change of electric power consumption, and is not combined with the operating state of the main energy-consuming equipment under normal drilling operation conditions. The existing problems include: 1) When the mud pump power increases significantly, the energy storage battery discharges for too long and the discharge amount is large, while the charge amount during the root connection period is too small, resulting in a long-term imbalance in the charge and discharge of the energy storage battery, affecting the continuous coordinated energy supply effect of the gas generator and the energy storage battery; 2) It is unreasonable to adjust the energy storage battery stop discharge time by increasing the number of gas generators turned on. There is a possibility that the normal drilling operation will immediately enter the root connection mode after the gas generator is started, affecting the improvement of the average load rate of the gas generator. Therefore, there is an urgent need for a storage battery scheduling strategy for normal drilling operations in oil and gas drilling. Combined with the operating status of the winch, the estimated discharge capacity of the energy storage battery, and the estimated rechargeable capacity of the energy storage battery, the number of gas generators turned on during normal drilling operations can be reasonably adjusted to control the continuous discharge capacity of the energy storage battery, improve the gas-to-electricity conversion efficiency of the gas generator, ensure the charge and discharge balance of the energy storage battery, and ensure the safe coordinated energy supply of the gas generator and energy storage battery in oil and gas drilling operations. Summary of the Invention

[0005] The purpose of the present invention is to provide a battery scheduling strategy for oil and gas drilling operations to solve the above problems and technical requirements. The technical solution of the present invention is as follows:

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

[0007] The scheduling strategy relies on a set of energy management system hardware already on site to implement scheduling;

[0008] The scheduling strategy adjusts the number of gas generators started according to the winch operating status, the estimated discharge amount of the energy storage battery and the estimated rechargeable amount of the energy storage battery to control the continuous discharge amount of the energy storage battery;

[0009] The winch operating state is detected by a sensor installed on the winch drum shaft;

[0010] The scheduling strategy includes the following steps:

[0011] Step 1: Update the estimated charge capacity of the energy storage battery after the current stand drilling is completed based on the historical charge capacity data of the energy storage battery during the stand drilling period ;

[0012] Step 2: Obtain total power consumption data , the cumulative discharge data of the energy storage battery , the current stand has been drilled into the depth data ;

[0013] Step 3: Based on the average drilling speed Calculate the remaining drilling time of the current stand ;

[0014] Step 4: Determine whether the energy storage battery is discharged and calculate the discharge power , determine the cause of energy storage battery discharge;

[0015] Step 5: If the energy storage battery is discharged, estimate the discharge amount based on the discharge reason of the energy storage battery. and estimated charge capacity , calculate the number of newly started gas generators ;

[0016] in, Number the roots.

[0017] Furthermore, the estimated charge capacity of the energy storage battery in step 1 According to the actual charge capacity of the energy storage battery during the first two connection times and get, For new drilling operations, the estimated charge capacity of the energy storage battery during the period of connecting the first stand after the first stand is drilled is = , The initial value is given by field experience and the value range is 40kWh-80kWh.

[0018] Furthermore, the average drilling speed in step 3 Calculated based on the drilling depth in the past 3 minutes; the remaining drilling time of the current root The current drilling depth and average penetration speed Calculation results:

[0019]

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

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

[0022] Step 41: If the winch is lifted, the gas generator load rate , the discharge power of the energy storage battery is ,The discharge of the energy storage battery is caused by the sudden power change caused by the winch lifting;

[0023] Step 42: If the winch is not lifted, the gas generator load rate , the discharge power of the energy storage battery is ,The discharge of the energy storage battery is caused by a substantial 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, The number of gas generators that were turned on at the time of data collection. It is 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 change in power due to the lifting of the winch, 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 mud pump power, and , then 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 mud pump power, and , then when the actual discharge capacity of the energy storage battery , 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.

[0030] Furthermore, the estimated discharge capacity of the energy storage battery in steps 52 and 53 The amount of energy stored in the battery has been discharged , the average discharge power of the energy storage battery in the past 1 minute and the remaining drilling time of the current root The calculation formula is:

[0031]

[0032] in, It is the average discharge power of the energy storage battery in the past 1 minute.

[0033] Furthermore, in step 53, if the number of gas generators to be started needs to be increased and the energy storage battery stops discharging, the number of gas generators to be started will be increased. Should meet And the gas generator has the largest load rate.

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

[0035] (1) This scheduling strategy combines the operating rules of mud pumps, top drives and winches in normal drilling operations of oil and gas drilling. On the basis of clarifying the causes of discharge of energy storage batteries, it takes a single stand as a cycle and the rechargeable capacity of adjacent stands as the basis. It ensures that the energy storage batteries can be utilized to the maximum extent to improve the gas-to-electricity conversion efficiency of gas generators, and ensures the balance of charge and discharge of energy storage batteries, thus realizing the coordinated energy supply safety 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 standpipe every 3 minutes and the average discharge power every 1 minute. During the entire standpipe drilling process, it can ensure that the estimated discharge data of the energy storage battery is updated in a timely manner, thereby improving the scheduling accuracy.

[0037] (3) When the mud pump power increases significantly and causes the energy storage battery to discharge, when the actual discharge capacity of the energy storage battery reaches 80% of the estimated chargeable capacity, the number of newly added gas generators turned on, the remaining power of the energy storage battery can still be used to cope with the power mutation when the winch is lifted, ensuring that the energy storage battery is not affected by the power mutation. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0039] Figure 2 This is a schematic diagram of data collection and control of 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 It is the total power consumption of a single stand of oil and gas drilling under normal drilling conditions provided by the embodiment of the present invention.

[0041] Figure 4 The embodiment of the present invention provides the output power distribution result of the gas generator and the energy storage battery. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents 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, the length of a single stand is 27m, and gas generators are used for power supply. Each drilling rig is equipped with 8 gas generators, and the rated power of each gas generator is The power is 300kW and the drilling operation is in spring. Based on the field experience, The value is 40kWh.

[0044] See also Figure 1 , is a flow chart of a battery storage scheduling strategy for normal oil and gas drilling operations provided by an embodiment of the present invention. The scheduling strategy includes the following steps:

[0045] Step 1: Update the estimated charge capacity of the energy storage battery after the current stand drilling is completed based on the historical charge capacity data of the energy storage battery during the stand drilling period ;

[0046] Step 2: Obtain total power consumption data , the cumulative discharge data of the energy storage battery , the current stand has been drilled into the depth data ;

[0047] Step 3: Based on the average drilling speed Calculate the remaining drilling time of the current stand ;

[0048] Step 4: Determine whether the energy storage battery is discharged and calculate the discharge power , determine the cause of energy storage battery discharge;

[0049] Step 5: If the energy storage battery is discharged, estimate the discharge amount based on the discharge reason of the energy storage battery. and estimated charge capacity , calculate the number of newly started gas generators ;

[0050] in, Number the roots.

[0051] In this embodiment of the present invention, step 1 provides data on the estimated charge capacity of the energy storage battery, an important reference for determining the number of additional gas generators to be activated. Step 2 is used to obtain real-time data on oil and gas drilling operations. Step 3 continuously updates the average drilling speed and remaining drilling time based on real-time data to ensure more accurate calculation of the estimated discharge capacity of the energy storage battery. Step 4 calculates the discharge power of the energy storage battery and, based on the operating status of the winch, determines the cause of the discharge. Step 5 determines whether the number of additional gas generators to be activated should be increased and calculates the specific value of the additional number.

[0052] In a preferred embodiment of the present invention, the estimated charge capacity of the energy storage battery in step 1 is According to the actual charge capacity of the energy storage battery during the first two connection times and get, For new drilling operations, the estimated charge capacity of the energy storage battery during the period of connecting the first stand after the first stand is drilled is = =40kWh;

[0053] It is understandable that during the drilling process from the beginning to the end of each stand, Keep constant; if , ,but =50kWh.

[0054] In a preferred embodiment of the present invention, the average drilling speed in step 3 is Calculated based on the drilling depth in the past 3 minutes; the remaining drilling time of the current root The current drilling depth and average penetration speed Calculation results:

[0055]

[0056] It is understandable that if the drilling depth in the last 3 minutes is 0.9m, the vertical root has drilled to a depth of 16m, the average drilling speed , remaining drilling time of the root .

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

[0058] Step 41: If the winch is lifted, the gas generator load rate , the discharge power of the energy storage battery is ,The discharge of the energy storage battery is caused by the sudden power change caused by the winch lifting;

[0059] Step 42: If the winch is not lifted, the gas generator load rate , the discharge power of the energy storage battery is ,The discharge of the energy storage battery is caused by a substantial 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] It is understandable that the load factor of gas generators When the load is on, the energy storage battery will first respond with discharge, and then the cause of the discharge of the energy storage battery will be determined in combination with the winch operation status data; the winch operation status is detected by the sensor 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 change in power due to the lifting of the winch, 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 mud pump power, and , then 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 mud pump power, and , then when the actual discharge capacity of the energy storage battery , 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;

[0068] Estimated discharge capacity of the energy storage battery in steps 52 and 53 The amount of energy stored in the battery has been discharged , the average discharge power of the energy storage battery in the past 1 minute and the remaining drilling time of the current root The calculation formula is:

[0069]

[0070] in, The average discharge power of the energy storage battery in the past 1 minute;

[0071] It is understandable that if the discharge of the energy storage battery is caused by the winch lifting, the energy storage battery will continue to discharge until the gas generator load factor is less than 75%;

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

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

[0074] It is understandable that the number of newly opened gas generators The final load rate of the gas generator set should be within the range of 0.5-0.75, and When there are multiple options, the value that can maximize the gas generator load rate should be selected;

[0075] If N=4, ,but =1 or 2 can make the gas generator load rate within the range of 0.5-0.75. In this case, you should choose =1 ensures the highest load rate for the gas generator.

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

[0077] See also Figure 3 The total power diagram of the normal drilling operation of a single stand of oil and gas drilling provided by the embodiment of the present invention is used to obtain the output power distribution of the gas generator and the energy storage battery using the scheduling strategy proposed by the present invention. The distribution result is as follows: Figure 4 The discharge capacity of a single energy storage battery is about 17kWh, and the energy storage battery can be charged 82kWh during the connection period, so the charge and discharge of the energy storage battery can be balanced.

[0078] The above embodiment is only one of the embodiments of the present invention and is not intended to limit the scope of protection of the present invention. Any changes that adopt the design principles of the present invention and any changes made through non-creative work on this basis should fall within the scope of protection of the present invention.

Claims

1. A battery storage scheduling strategy for normal oil and gas drilling operations, characterized by: The scheduling strategy includes the following steps: Step 1: Update the estimated charge capacity of the energy storage battery after the current stand drilling is completed based on the historical charge capacity data of the energy storage battery during the stand drilling period ; Step 2: Obtain total power consumption data , the cumulative discharge data of the energy storage battery , the current stand has been drilled into the depth data ; Step 3: Based on the average drilling speed Calculate the remaining drilling time of the current stand ; Step 4: Determine whether the energy storage battery is discharged and calculate the discharge power , determine the cause of energy storage battery discharge; Step 5: If the energy storage battery is discharged, estimate the discharge amount based on the discharge reason of the energy storage battery. and estimated charge capacity , calculate the number of newly started gas generators ; in, Number the roots.

2. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1 is characterized in that: Estimated charge capacity of the energy storage battery in step 1 According to the actual charge capacity of the energy storage battery during the first two connection times and get, ; For new drilling operations, the estimated amount of energy storage battery charge that can be achieved after the first stand is drilled and the stand is connected. = , The initial value is given by field experience and the value range is 40kWh-80kWh.

3. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1 is characterized in that: Average drilling speed in step 3 Calculated based on the drilling depth in the past 3 minutes; the remaining drilling time of the current root The current drilling depth and average penetration speed Calculation results: in: The length of a single stand.

4. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1 is characterized in that: Step 4 specifically includes the following sub-steps: Step 41: If the winch is lifted, the gas generator load rate , the discharge power of the energy storage battery is ,The discharge of the energy storage battery is caused by the sudden power change caused by the winch lifting; Step 42: If the winch is not lifted, the gas generator load rate , the discharge power of the energy storage battery is ,The discharge of the energy storage battery is caused by a substantial increase in the power of the mud pump; Step 43: If the gas generator load rate , the energy storage battery does not discharge; in, The number of gas generators that were turned on at the time of data collection. It is the rated power of a single gas generator.

5. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 1 is characterized in that: Step 5 specifically includes the following sub-steps: Step 51: If the discharge of the energy storage battery is caused by a sudden change in power due to the lifting of the winch, the number of gas generators turned on remains unchanged. , 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 mud pump power, and , then the number of gas generators turned on remains unchanged, , 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 mud pump power, and , then when the actual discharge capacity of the energy storage battery , 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.

6. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 5, characterized in that: Estimated discharge capacity of the energy storage battery in steps 52 and 53 The amount of energy stored in the battery has been discharged , the average discharge power of the energy storage battery in the past 1 minute and the remaining drilling time of the current root The calculation formula is: in, It is the average discharge power of the energy storage battery in the past 1 minute.

7. The energy storage battery scheduling strategy for normal drilling operations in oil and gas drilling according to claim 5, characterized in that: If the number of gas generators to be started needs to be increased in step 53 and the energy storage battery stops discharging, the number of gas generators to be started will be increased. Should meet And the gas generator has the largest load rate.

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