A new energy power generation installed capacity design method in an energy island scenario based on oil well pressure recovery law

Abstract

A new energy power generation installed capacity design method based on oil well pressure recovery law in energy island scene, belongs to wind energy, solar energy evaluation utilization technical field, including the following steps: S1, obtain the oil well pressure recovery curve; S2, fill in the oil well pressure recovery curve; S3, zero processing is carried out to pressure recovery curve; S4, according to pressure recovery curve determines reasonable stop pumping time T m , and thus determines the pumping time T n ; S5, according to the reasonable pumping time of oil well determines pumping unit daily power consumption Q; S6, repeat step S1-S6, calculate the daily power consumption of pumping unit of all oil wells in the block by the same method, obtain the total daily power consumption Q all of all oil wells in the block; S7, determine the reasonable installed capacity M of wind and solar power generation. The present application determines the reasonable pumping time of oil well by analyzing the oil well pressure recovery law, measures the demand power consumption of oil well in the block, and reasonably optimizes the new energy power generation installed capacity in energy island scene.

Description

Technical Field

[0001] This invention belongs to the field of wind and solar energy evaluation and utilization technology, specifically involving a method for designing the installed capacity of new energy power generation in an energy island scenario based on the oil well pressure recovery law. Background Technology

[0002] Oilfield renewable energy consumption scenarios are divided into two categories: grid-connected and off-grid. In grid-connected scenarios, renewable energy and traditional grid power are supplied in tandem, achieving continuous and stable power supply through grid compensation. This does not adversely affect oilfield production; it simply uses green electricity to replace part of the grid power, thus reducing production costs. Off-grid scenarios, also known as energy islands, have zero external energy input, with production electricity mainly coming from wind and solar power. To adapt to the random fluctuations in wind and solar power generation, energy storage combined with intermittent production is necessary. In energy island scenarios, insufficient renewable energy generation capacity will force oil wells to be passively shut down for extended periods, affecting production. Conversely, excessive renewable energy generation capacity will lead to over-generation and waste of resources. Currently, when oilfield enterprises adopt the energy island model to develop crude oil, the installed capacity of wind and solar power generation is mainly determined based on the historical electricity consumption of the block and experience. Since the pressure recovery law of oil wells during intermittent production is not taken into account, the power generation of wind and solar power is difficult to meet the energy demand of oilfield production and affects the normal production rhythm of oilfields. There is a lack of reasonable installed capacity design methods. It is necessary to establish a new energy power generation installed capacity design method based on the oil well pressure recovery law and ensuring the oil well pumping time. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a method for designing the installed capacity of new energy power generation in an energy island scenario based on the oil well pressure recovery law, comprising the following steps:

[0004] S1. Obtain the oil well pressure recovery curve;

[0005] S2. Complete the oil well pressure recovery curve;

[0006] S3. Zero out the pressure recovery curve;

[0007] S4. Determine the appropriate stopping time T based on the pressure recovery curve. m And thus determine the start time T. n ;

[0008] S5. Determine the daily power consumption Q of the pumping unit based on the reasonable start-up time of the oil well;

[0009] S6. Repeat steps S1-S6 to calculate the daily power consumption of all oil well pumping units in the block using the same method, and obtain the total daily power consumption Q of all oil wells in the block. all ;

[0010] S7. Determine the reasonable installed capacity M for wind and solar power generation.

[0011] Furthermore, in step S1, a storage-type pressure gauge is installed below the oil well pump. After pumping stops, the fluid level rises, the pressure recovery curve is tested, and the relationship between downhole pressure and pumping stop time is fitted:

[0012] P = f(t) (5-1)

[0013] In equation (5-1), P is the downhole pressure measured by the pressure gauge, in MPa; t is the stop pumping time, in h.

[0014] Furthermore, in step S2, the curve between the initial pressure and 0 MPa is completed according to equation (5-1).

[0015] Furthermore, in step S3, the moment when the pressure starts to recover from 0 MPa is defined as the starting point (P=0, t=0). After the pressure recovery curve is completed, the initial pressure is zero, but the starting time is not zero, so the curve is zeroed out.

[0016] Furthermore, setting P = 0, we obtain Δt and thus the pressure recovery curve after zeroing, with the following relationship:

[0017] P1=f(T)=f(t-Δt) (5-2)

[0018] Equation (5-2) represents the original curve shifted to the right by Δt units, where P1 is the corrected downhole test pressure in MPa; T is the stop pumping time starting from zero in h; and Δt is the intercept of the original curve on the X-axis in h.

[0019] Furthermore, in step S4, the pressure recovery rate can be expressed by differentiating formula (5-2), that is:

[0020] V=f′(T) (5-3)

[0021] In equation (5-3), V is the pressure recovery rate, with units of MPa / h.

[0022] Furthermore, when the pressure recovery rate drops to 50% of the initial rate, pumping should begin immediately; this time is the reasonable stopping time.

[0023] f′(T m )≥0.5f′(0) (5-4)

[0024] The reasonable time for stopping pumping of the oil well, T, was determined. m Then the reasonable opening time T n for:

[0025] T n =24-T m (5-5).

[0026] Furthermore, in step S5, if the power consumption of the pumping unit during continuous production of the oil well throughout the day is Q0, then the production T n The power consumption Q over time is:

[0027]

[0028] Furthermore, in step S6, the total daily electricity consumption Q of all oil wells in the block... all The calculation formula is as follows:

[0029]

[0030] In equation (5-7), i = 1, 2, 3... represents the well number; j represents the number of oil wells in the block.

[0031] Furthermore, in step S7,

[0032]

[0033] In equation (5-8), M represents the installed capacity of wind and solar power generation, in MW; Q oth This refers to the daily electricity consumption of loads other than the pumping unit in the block, expressed in kWh.

[0034] The beneficial effects of this invention are as follows: This invention determines the reasonable start-up time of oil wells by analyzing the oil well pressure recovery law, calculates the power consumption demand of oil wells in the block, and reasonably optimizes the installed capacity of new energy power generation in the scenario of energy island.

[0035] This invention provides a method for designing the installed capacity of new energy power generation in an energy island scenario based on the oil well pressure recovery law. Addressing the problem of not being able to determine the reasonable installed capacity of new energy power generation in an energy island scenario, this method utilizes the oil well pressure recovery law to determine the reasonable start-up time of the oil well, thereby determining the power demand of the oil well pumping unit. Combined with the power demand of other loads in the block, the method scientifically designs the installed capacity of new energy power generation in the energy island block. This avoids both the problem of insufficient installed capacity affecting normal oil well production and the problem of excessive installed capacity wasting resources. Attached Figure Description

[0036] Figure 1 For pressure recovery curves;

[0037] Figure 2 The pressure recovery curve after completion;

[0038] Figure 3 This is a pressure recovery curve after the pressure has been reduced to zero.

[0039] Figure 4 This is a pressure recovery curve of well A-1 in the example;

[0040] Figure 5 This is a pressure recovery curve after well A-1 was filled in, as shown in the example.

[0041] Figure 6 This is a pressure recovery curve of well A-1 after it was brought to zero in the example. Detailed Implementation

[0042] Example 1

[0043] To make the technical means and objectives of this invention easier to understand, the invention is further described below with reference to specific embodiments. A method for designing the installed capacity of new energy power generation in an energy island scenario based on the oil well pressure recovery law includes the following steps:

[0044] S1. Obtain the oil well pressure recovery curve;

[0045] S2. Complete the oil well pressure recovery curve;

[0046] S3. Zero out the pressure recovery curve;

[0047] S4. Determine the appropriate stopping time T based on the pressure recovery curve. m And thus determine the start time T. n ;

[0048] S5. Determine the daily power consumption Q of the pumping unit based on the reasonable start-up time of the oil well;

[0049] S6. Repeat steps S1-S6 to calculate the daily power consumption of all oil well pumping units in the block using the same method, and obtain the total daily power consumption Q of all oil wells in the block. all ;

[0050] S7. Determine the reasonable installed capacity M for wind and solar power generation.

[0051] In step S1, a storage pressure gauge is installed below the oil well pump. After pumping stops, the fluid level rises, the pressure recovery curve is tested, and the relationship between downhole pressure and pumping stop time is fitted.

[0052] P = f(t) (5-1)

[0053] In equation (5-1), P is the downhole pressure measured by the pressure gauge, in MPa; t is the stop pumping time, in h.

[0054] In step S2, the curve between the initial pressure and 0 MPa is completed according to equation (5-1).

[0055] In step S3, the moment when the pressure starts to recover from 0 MPa is defined as the starting point (P=0, t=0). After the pressure recovery curve is completed, the initial pressure is zero, but the starting time is not zero. The curve is then zeroed out.

[0056] Let P = 0, calculate Δt, and obtain the pressure recovery curve after zeroing. The relationship is:

[0057] P1=f(T)=f(t-Δt) (5-2)

[0058] Equation (5-2) represents the original curve shifted to the right by Δt units, where P1 is the corrected downhole test pressure in MPa; T is the stop pumping time starting from zero in h; and Δt is the intercept of the original curve on the X-axis in h.

[0059] In step S4, the pressure recovery rate can be expressed by differentiating formula (5-2), that is:

[0060] V=f′(T) (5-3)

[0061] In equation (5-3), V is the pressure recovery rate, with units of MPa / h.

[0062] Specifically, pumping should begin immediately when the pressure recovery rate drops to 50% of the initial rate; this time is the reasonable stopping time.

[0063] f′(T m )≥0.5f′(0) (5-4)

[0064] The reasonable time for stopping pumping of the oil well, T, was determined. m Then the reasonable opening time T n for:

[0065] T n =24-T m (5-5).

[0066] In step S5, if the power consumption of the pumping unit during continuous production throughout the day is Q0, then the power consumption Q during production time Tn is:

[0067]

[0068] In step S6, the total daily electricity consumption Q of all oil wells in the block is... all The calculation formula is as follows:

[0069]

[0070] In equation (5-7), i = 1, 2, 3... represents the well number; j represents the number of oil wells in the block.

[0071] In step S7,

[0072]

[0073] In equation (5-8), M represents the installed capacity of wind and solar power generation, in MW; Q oth This refers to the daily electricity consumption of loads other than the pumping unit in the block, expressed in kWh.

[0074] Example 2

[0075] The technical solution provided by this invention to solve the above-mentioned technical problems includes the following steps:

[0076] (1) Obtain the oil well pressure recovery curve.

[0077] A storage-type pressure gauge is installed below the oil well pump. After pumping stops, the fluid level rises, and the pressure recovery curve is tested. Figure 1 As shown, the relationship between downhole pressure and pumping stop time is fitted.

[0078] P = f(t) (5-1)

[0079] In equation (5-1), P is the downhole pressure measured by the pressure gauge, in MPa; t is the stop pumping time, in h.

[0080] (2) Complete the oil well pressure recovery curve.

[0081] Because the oil pump always has a certain degree of submersion, the initial pressure of the pressure recovery curve does not start from 0 MPa. Therefore, the test curve is incomplete and needs to be completed according to equation (5-1) to fill in the gap between the initial pressure and 0 MPa. Figure 2 As shown.

[0082] (3) The pressure recovery curve is zeroed out.

[0083] Define the moment when the pressure begins to recover from 0 MPa as the starting point (P = 0, t = 0). After the pressure recovery curve is completed, the initial pressure is zero, but the starting time is not zero, so the curve needs to be zeroed out. Let P = 0, calculate Δt, and obtain the zeroed-out pressure recovery curve as shown below. Figure 3 As shown.

[0084] P1=f(T)=f(t-Δt) (5-2)

[0085] Equation (5-2) represents the original curve shifted to the right by Δt units, where P1 is the corrected downhole test pressure in MPa; T is the stop pumping time starting from zero in h; and Δt is the intercept of the original curve on the X-axis in h.

[0086] (4) Determine the reasonable stopping time T based on the pressure recovery curve.m And thus determine the start time T. n .

[0087] During the pressure recovery process after pumping stops, the pressure recovery rate slows down as the seepage pressure difference continuously decreases. The pressure recovery rate can be expressed by differentiating equation (5-2), i.e.:

[0088] V=f′(T) (5-3)

[0089] In equation (5-3), V is the pressure recovery rate, with units of MPa / h.

[0090] As the shutdown time lengthens, the pressure recovery rate slows down. When the pressure recovery rate drops to 50% of the initial rate, the pumping should be resumed immediately to avoid a significant impact on production. This time is the reasonable shutdown time.

[0091] f′(T m )≥0.5f′(0) (5-4)

[0092] The reasonable time for stopping pumping of the oil well, T, was determined. m Then the reasonable opening time T n for:

[0093] T n =24-T m (5-5)

[0094] (5) Determine the daily power consumption Q of the pumping unit based on the reasonable pumping time of the oil well.

[0095] Let Q0 be the power consumption of the pumping unit when the oil well is in continuous production throughout the day. Then, the production T n The power consumption Q over time is:

[0096]

[0097] (6) Repeat steps (1) to (6) to calculate the daily power consumption of all oil well pumping units in the block using the same method, and obtain the total daily power consumption Q of all oil wells in the block. all :

[0098]

[0099] In equation (5-7), i = 1, 2, 3... represents the well number; j represents the number of oil wells in the block.

[0100] (7) Determine the reasonable installed capacity M for wind and solar power generation.

[0101]

[0102] In equation (5-8), M represents the installed capacity of wind and solar power generation, in MW; Q othThis refers to the daily electricity consumption of loads other than the pumping unit in the block, expressed in kWh.

[0103] Example 3

[0104] The design of renewable energy power generation capacity for Block A under the energy island scenario based on oil well pressure recovery patterns includes the following steps:

[0105] (1) Obtain the oil well pressure recovery curve.

[0106] A storage pressure gauge was installed below the pumping unit of well A-1 in block A. After pumping was stopped, the fluid level rose, and the pressure recovery curve was tested. Figure 4 As shown, the relationship between downhole pressure and pumping stop time is fitted.

[0107] P = 0.0007 t 3 -0.3282t 2 +62.357t+2432.7 (8-1)

[0108] (2) Complete the oil well pressure recovery curve.

[0109] Because the oil pump always has a certain degree of submersion, the starting pressure of the pressure recovery curve does not start from 0 MPa. The test curve is incomplete and needs to be completed according to equation (1) between the starting pressure and 0 MPa. Figure 5 As shown.

[0110] (3) The pressure recovery curve is zeroed out.

[0111] Define the moment when the pressure begins to recover from 0 MPa as the starting point (P = 0, t = 0). After the pressure recovery curve is completed, the initial pressure is zero, but the starting time is not zero, so the curve needs to be zeroed out, such as... Figure 6 As shown. Let P = 0, we obtain Δt = 29, then the pressure recovery curve after zeroing is:

[0112] P1=f(T)=f(t-Δt)=0.0008T 3 -0.4144T 2 +87.843T-18.349

[0113] (8-2)

[0114] (4) Determine the reasonable stopping time T based on the pressure recovery curve. m And thus determine the start time T. n .

[0115] During the pressure recovery process after pumping stops, the pressure recovery rate slows down as the seepage pressure difference continuously decreases. The pressure recovery rate can be expressed by differentiating equation (8-2), i.e.:

[0116] V = f′(T) = 0.0008 × 3T 2 -0.4144×2T+87.843 (8-3)

[0117] As the shutdown time lengthens, the pressure recovery rate slows down. When the pressure recovery rate drops to 50% of the initial rate, the pumping should be resumed immediately to avoid a significant impact on production. This time is the reasonable shutdown time.

[0118] f′(T m )≥0.5f′(0)=0.5×87.843=43.9215kPa / h (8-4)

[0119] The reasonable stopping time T corresponding to the liquid level recovery rate m If the time is 7 hours, then the reasonable time to start pumping is T. n for:

[0120] T n =24-7=17h (8-5)

[0121] (5) Determine the daily power consumption Q of the pumping unit based on the reasonable pumping time of the oil well.

[0122] If the pumping unit consumes 85 kWh during continuous production throughout the day, then the electricity consumption Q for 17 hours of production is:

[0123]

[0124] (6) Repeat steps (1) to (5) to calculate the daily power consumption of the pumping units of the 92 oil wells in the block using the same method, and obtain the total daily power consumption Q of all oil wells in the block. all :

[0125]

[0126] (7) The electricity load in the area is all from oil wells, and the reasonable installed capacity for wind and solar power generation is determined to be 2.3MW.

[0127]

[0128] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for designing the installed capacity of new energy power generation in an energy island scenario based on the oil well pressure recovery law, characterized in that, Includes the following steps: S1. Obtain the oil well pressure recovery curve; S2. Complete the oil well pressure recovery curve; S3. Zero out the pressure recovery curve; S4. Determine the appropriate stopping time T based on the pressure recovery curve. m And thus determine the start time T. n ; S5. Determine the daily power consumption Q of the pumping unit based on the reasonable start-up time of the oil well; S6. Repeat steps S1-S6 to calculate the daily power consumption of all oil well pumping units in the block using the same method, and obtain the total daily power consumption Q of all oil wells in the block. all ; S7. Determine the reasonable installed capacity M for wind and solar power generation.

2. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 1, characterized in that, In step S1, a storage pressure gauge is installed below the oil well pump. After pumping stops, the fluid level rises, the pressure recovery curve is tested, and the relationship between downhole pressure and pumping stop time is fitted. P = f(t) (5-1) In equation (5-1), P is the downhole pressure measured by the pressure gauge, in MPa; t is the stop pumping time, in h.

3. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 2, characterized in that, In step S2, the curve between the initial pressure and 0 MPa is completed according to equation (5-1).

4. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 3, characterized in that, In step S3, the moment when the pressure starts to recover from 0 MPa is defined as the starting point (P=0, t=0). After the pressure recovery curve is completed, the initial pressure is zero, but the starting time is not zero. The curve is then zeroed out.

5. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 4, characterized in that, Let P = 0, calculate Δt, and obtain the pressure recovery curve after returning to zero. The relationship is: P1=f(T)=f(t-Δt) (5-2) Equation (5-2) represents the original curve shifted to the right by Δt units, where P1 is the corrected downhole test pressure in MPa; and T is the stop pumping time starting from zero in hours. Δt is the intercept of the original curve on the X-axis, in units of h.

6. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 5, characterized in that, In step S4, the pressure recovery rate can be expressed by differentiating formula (5-2), that is: V=f′(T) (5-3) In equation (5-3), V is the pressure recovery rate, with units of MPa / h.

7. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 6, characterized in that, When the pressure recovery rate drops to 50% of the initial rate, pumping should begin immediately. This time is the reasonable stopping time. f′(T m )≥0.5f′(0) (5-4) The reasonable time for stopping pumping of the oil well, T, was determined. m Then the reasonable opening time T n for: T n =24-T m (5-5)。 8. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 7, characterized in that, In step S5, let Q0 be the power consumption of the pumping unit when the oil well is in continuous production throughout the day, then the production T n The power consumption Q over time is:

9. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 8, characterized in that, In step S6, the total daily electricity consumption Q of all oil wells in the block all The calculation formula is as follows: In equation (5-7), i = 1, 2, 3... represents the well number; j represents the number of oil wells in the block.

10. The method for designing the installed capacity of new energy power generation in an energy island scenario based on oil well pressure recovery law as described in claim 9, characterized in that, In step S7 In equation (5-8), M represents the installed capacity of wind and solar power generation, in MW; Q oth This refers to the daily electricity consumption of loads other than the block pumping unit, expressed in kWh.

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