A coordinated scheduling strategy for gas generators and energy storage batteries in oil and gas drilling

Abstract

This invention discloses a coordinated scheduling strategy for gas generators and energy storage batteries in oil and gas drilling, belonging to the field of energy storage and charging technology. It primarily addresses the problem of poor peak-shaving and valley-filling effects of energy storage batteries under normal drilling conditions. Based on the drilling operation status, this scheduling strategy combines drilling time, drilling depth, energy storage battery discharge level, remaining energy level, and state of charge to rationally adjust the number of gas generators activated and control the charging and discharging of the energy storage batteries. This effectively improves the gas-to-electricity conversion efficiency under normal drilling conditions while ensuring the safe coordinated power supply of gas generators and energy storage batteries, thus reducing drilling costs.

Description

Technical Field

[0001] This invention belongs to the field of energy storage and charging technology, specifically, it relates to a coordinated scheduling strategy for gas generators and energy storage batteries used in oil and gas drilling. Background Technology

[0002] To address the issues of high peak power and large power fluctuations in oil and gas drilling operations, which lead to low gas-to-electricity conversion efficiency under gas generator power supply modes, electrochemical energy storage batteries have been proposed to work in conjunction with gas generators to power oil and gas drilling operations. Existing scheduling strategies primarily improve the gas-to-electricity conversion efficiency of gas generators by controlling the charging of energy storage batteries during oil and gas drilling connection periods and discharging them under other operating conditions, thereby increasing energy utilization.

[0003] Normal drilling operations constitute the main process flow of oil and gas drilling, accounting for approximately 50% of the total drilling time. Fluctuations in mud pump pressure and brief winch jacking during normal drilling operations are the primary causes of significant power fluctuations and are also the main scenarios for energy storage battery discharge in a combined gas generator and energy storage battery power supply mode. However, the total amount of energy storage battery discharge caused by mud pump pressure fluctuations and winch jacking during normal drilling operations is limited. This often fails to consume the total charge of the energy storage battery during the previous connection period, affecting the charging process of the energy storage battery during subsequent connection periods. This hinders the effective "peak shaving and valley filling" effect of the energy storage battery, ultimately impacting the gas-to-electricity conversion efficiency of the gas generator throughout the entire normal drilling operation. Therefore, there is an urgent need for a coordinated scheduling strategy for gas generators and energy storage batteries in oil and gas drilling. Based on the drilling operation status, and combined with the drilling time, drilling depth, energy storage battery discharge, energy storage battery remaining power, and energy storage battery state of charge, the number of gas generators turned on should be reasonably adjusted to control the balance of energy storage battery charging and discharging during adjacent connection points and normal drilling, so as to ensure the safety of energy supply for oil and gas drilling while effectively improving the gas-to-electricity conversion efficiency of gas generators under normal drilling operation conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a coordinated scheduling strategy for gas generators and energy storage batteries in oil and gas drilling, thereby solving the aforementioned problems and technical requirements. The technical solution of this invention is as follows:

[0005] A coordinated scheduling strategy for gas generators and energy storage batteries for oil and gas drilling;

[0006] The scheduling strategy relies on a set of intelligent energy management system hardware to implement the scheduling.

[0007] The scheduling strategy, based on the drilling operation status, takes into account the drilling time, drilling depth, energy storage battery discharge amount, energy storage battery remaining power, and energy storage battery state of charge, and reasonably adjusts the number of gas generators turned on to control the charging and discharging of energy storage batteries.

[0008] The scheduling strategy steps specifically include:

[0009] Step 1, Data Acquisition, including total power consumption Number of gas generators turned on The current root has been drilled for a long time. The current root system has been drilled to a depth of [depth missing]. The current discharge capacity of Ligen energy storage batteries The current remaining power of the Ligen energy storage battery Energy storage battery state of charge ;

[0010] Step 2: If the oil and gas drilling is in a normal drilling state with the well depth gradually increasing, and the gas generator has not been shut down at the current stand, perform the following calculations and scheduling:

[0011] Step 2.1, calculate the remaining drilling time for the current foundation. And the duration of continuous discharge of the energy storage battery after shutting down one gas generator. ;

[0012] The and The calculation formula is:

[0013] ;

[0014] ;

[0015] in, For energy storage battery capacity, This refers to the rated power of a single gas generator.

[0016] Step 2.2, if and If the time is not less than 10 minutes, one gas generator will be shut down, and the energy storage battery discharge power will be [missing value]. Otherwise, the number of gas generators turned on remains unchanged, and the energy storage battery discharge power is... ;

[0017] Step 3: If the oil and gas drilling is in a normal drilling state with the well depth gradually increasing, and one gas generator has been shut down, execute the following scheduling:

[0018] Currently, Ligen will not reduce the number of gas generators in operation; the energy storage batteries will discharge according to electricity demand, with a discharge power of [missing information]. ;

[0019] Step 4: If the oil and gas drilling is in the standby state, execute the following scheduling:

[0020] Energy storage batteries only charge and do not discharge; energy storage battery charging power. , and when The energy storage battery stops charging.

[0021] Furthermore, if one gas generator has been shut down during normal drilling, then when the oil and gas drilling transitions from the normal drilling state, where the well depth gradually increases, to the stand-up connection state, an additional gas generator needs to be turned on.

[0022] Furthermore, if the gas generator has not been shut down during normal drilling, the number of gas generators turned on remains unchanged after entering the connection state.

[0023] The above-described solution of the present invention has at least the following beneficial effects:

[0024] (1) Based on the drilling operation status, drilling time, drilling depth, energy storage battery discharge amount, energy storage battery remaining power, and energy storage battery charge status, this scheduling strategy reasonably adjusts the number of gas generators turned on and controls the charging and discharging of energy storage batteries. It can transfer the energy storage battery charge in the connection state to the normal drilling state when the well depth increases, achieve the maximum benefit of "peak shaving and valley filling", and reduce drilling costs.

[0025] (2) The decision analysis of shutting down one gas generator in this scheduling strategy not only considers the discharge of the energy storage battery caused by the fluctuation of the mud pump pressure and the brief lifting of the winch, and the minimum 10% charge of the energy storage battery, but also ensures that the continuous discharge time of the energy storage battery after shutting down the gas generator is not less than the remaining drilling time of the current foundation, and the remaining drilling time is not less than 10 minutes, which effectively ensures the safety of the drilling operation power supply, and avoids the frequent start-up and shutdown of the gas generator in a short period of time.

[0026] (3) The scheduling strategy adjusts the number of gas generators turned on after the drilling operation enters the connection mode. This not only ensures that the energy storage battery has enough power to charge during the connection period, but also ensures that the number of gas generators turned on when drilling the next connection is the same as that of the previous connection, thus avoiding unnecessary discharge of the energy storage battery in the early stage of normal drilling. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a coordinated scheduling process for a gas generator and an energy storage battery used in oil and gas drilling, provided by an embodiment of the present invention.

[0028] Figure 2 This is a total power consumption fluctuation curve under normal drilling conditions in oil and gas drilling, provided by an embodiment of the present invention.

[0029] Figure 3 This is the power distribution of the gas generator and energy storage battery provided in the embodiments of the present invention.

[0030] Figure 4 This embodiment of the invention provides the number of gas generators that can be turned on. Detailed Implementation

[0031] 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.

[0032] 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 maximum power is 300kW, and the maximum power of the energy storage battery is 800kW with a capacity of 200kWh.

[0033] See Figure 1 This is a schematic diagram illustrating a coordinated scheduling process for a gas generator and energy storage battery used in oil and gas drilling, provided as an embodiment of the present invention. Figure 1 The scheduling strategy steps specifically include:

[0034] Step 1, Data Acquisition, including total power consumption Number of gas generators turned on The current root has been drilled for a long time. The current root system has been drilled to a depth of [depth missing]. The current discharge capacity of Ligen energy storage batteries The current remaining power of the Ligen energy storage battery Energy storage battery state of charge ;

[0035] The total power consumption is calculated based on the total voltage and current at the input of the VFD room. The number of gas generators turned on is obtained through switch signals. The discharged amount, remaining amount and state of charge of the energy storage battery are fed back by the energy storage battery system BMS. The drilling time is counted by the energy intelligent management system. The drilling depth is fed back by the winch sensor.

[0036] Step 2: If the oil and gas drilling is in a normal drilling state with the well depth gradually increasing, and the gas generator has not been shut down at the current stand, execute the following scheduling:

[0037] Step 2.1, calculate the remaining drilling time for the current foundation. And the duration of continuous discharge of the energy storage battery after shutting down one gas generator. ;

[0038] The and The calculation formula is:

[0039] ;

[0040] ;

[0041] Step 2.2, if and If the time is not less than 10 minutes, one gas generator will be shut down, and the energy storage battery discharge power will be [missing value]. Otherwise, the number of gas generators turned on remains unchanged, and the energy storage battery discharge power is... ;

[0042] Understandably, the remaining drilling time of the current foundation and the duration that the energy storage battery can continue to discharge after shutting down one gas generator are important factors in deciding whether to shut down the gas generator. At the same time, in order to avoid frequent start-stop of the gas generator, when shutting down one gas generator, it should be ensured that the remaining drilling time of the current foundation is not less than 10 minutes.

[0043] If the oil and gas drilling is in a normal drilling process with the well depth gradually increasing, and the current drilling rig has not shut down the gas generator, , , , Then shut down one gas generator. ;

[0044] If the oil and gas drilling is in a normal drilling process with the well depth gradually increasing, and the current drilling rig has not shut down the gas generator, , , , The number of gas generators turned on remains unchanged. ;

[0045] Step 3: If the oil and gas drilling is in a normal drilling state with the well depth gradually increasing, and one gas generator has been shut down, execute the following scheduling:

[0046] Currently, Ligen will not reduce the number of gas generators in operation; the energy storage batteries will discharge according to electricity demand, with a discharge power of [missing information]. ;

[0047] Understandably, by using energy storage batteries to "smooth out peaks and fill valleys," only one gas generator is allowed to be shut down during normal drilling to ensure the safety of coordinated power supply from the gas generator and the energy storage battery.

[0048] If the oil and gas drilling is in a normal drilling state with the well depth gradually increasing, and one gas generator has been shut down, then... , hour, ;

[0049] Step 4: If the oil and gas drilling is in the standby state, execute the following scheduling:

[0050] Energy storage batteries only charge and do not discharge; energy storage battery charging power. , and when The energy storage battery stops charging.

[0051] Understandably, if oil and gas drilling is in the process of establishing a connection point and... , , ,but If the oil and gas drilling is in the stand-up state and ,but .

[0052] In a preferred embodiment of the present invention, if one gas generator has been shut down under normal drilling conditions, then when the oil and gas drilling changes from the normal drilling conditions where the well depth gradually increases to the connection of the drilling shaft, one additional gas generator needs to be turned on; if the gas generator has not been shut down under normal drilling conditions, then the number of gas generators turned on remains unchanged after entering the connection of the drilling shaft.

[0053] Understandably, once oil and gas drilling enters the connection and connection phase, it should be ensured that the number of gas generators turned on in this phase is the same as the number of gas generators that are not turned off in the normal drilling phase.

[0054] If the number of gas generators started at 4 at the time of data acquisition before the oil and gas drilling entered the connection state, and 1 gas generator has been shut down at the current connection state, then 5 gas generators need to be turned on after entering the connection state; if the number of gas generators started at 4 at the time of data acquisition before the oil and gas drilling entered the connection state, but the gas generators have not been shut down at the current connection state, then the number of gas generators turned on will remain at 4 after entering the connection state.

[0055] See Figure 2 This is a total power consumption fluctuation curve under normal drilling conditions in oil and gas drilling, provided as an embodiment of the present invention. When entering the current normal drilling operation, the energy storage battery capacity is 145 kWh. Using the scheduling strategy of the present invention, the following is obtained: Figure 3 The output power distribution of the gas generator and energy storage battery is shown, and as follows: Figure 4 The diagram shows the change in the number of gas generators in operation. It took 46 minutes for the number of gas generators to decrease from 4 to 3, during which time the total discharge of the energy storage battery was 124.8 kWh.

[0056] 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 coordinated scheduling strategy for gas generators and energy storage batteries used in oil and gas drilling, characterized in that: The scheduling strategy, based on the drilling operation status, takes into account the drilling time, drilling depth, energy storage battery discharge amount, energy storage battery remaining power, and energy storage battery state of charge, and reasonably adjusts the number of gas generators turned on to control the charging and discharging of energy storage batteries. The scheduling strategy steps specifically include: Step 1, Data Acquisition, including total power consumption Number of gas generators turned on The current root has been drilled for a long time. The current root system has been drilled to a depth of [depth missing]. The current discharge capacity of Ligen energy storage batteries The current remaining power of the Ligen energy storage battery Energy storage battery state of charge ; Step 2: If the oil and gas drilling is in a normal drilling state with the well depth gradually increasing, and the gas generator has not been shut down at the current stand, execute the following scheduling: Step 2.1, calculate the remaining drilling time for the current foundation. And the duration of continuous discharge of the energy storage battery after shutting down one gas generator. ; The and The calculation formula is: ； ； in, For energy storage battery capacity, This refers to the rated power of a single gas generator. Step 2.2, if and If the time is not less than 10 minutes, one gas generator will be shut down, and the energy storage battery discharge power will be [missing value]. Otherwise, the number of gas generators turned on remains unchanged, and the energy storage battery discharge power is... ; Step 3: If the oil and gas drilling is in a normal drilling state with the well depth gradually increasing, and one gas generator has been shut down, execute the following scheduling: Currently, Ligen will not reduce the number of gas generators in operation; the energy storage batteries will discharge according to electricity demand, with a discharge power of [missing information]. ; Step 4: If the oil and gas drilling is in the standby state, execute the following scheduling: Energy storage batteries only charge and do not discharge; energy storage battery charging power. , and when The energy storage battery stops charging.

2. The coordinated scheduling strategy for gas generators and energy storage batteries for oil and gas drilling according to claim 1, characterized in that: If one gas generator has been shut down during normal drilling, then when the oil and gas drilling transitions from the normal drilling state where the well depth gradually increases to the stand-up state, an additional gas generator needs to be turned on. If the gas generator has not been shut down during normal drilling, the number of gas generators turned on will remain unchanged after entering the connection state.

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