Water invasion wave and coefficient determination method and device, electronic equipment and storage medium

Abstract

The invention discloses a water invasion wave and coefficient determination method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring reservoir basic parameters, geological stratification data and a logging curve of the water-driven gas reservoir; according to the geological stratification data and the logging curve, the permeability mean value and the thickness of each reservoir of the water-driven gas reservoir are calculated; for each reservoir of the water-driven gas reservoir, according to the reservoir basic parameters, the permeability mean value and the thickness of the reservoir, the production water-gas ratio of the reservoir during water invasion and water breakthrough is determined; according to the production water-gas ratio during water invasion, determining a water invasion water layer during discarding and a water invasion non-water layer during discarding from all reservoirs of the water-driven gas reservoir; and according to the reservoir basic parameters, the permeability mean value of the water-invasion-free water layer in the discarding process and the thickness of each reservoir of the water-driven gas reservoir, calculating the water invasion wave and coefficient in the discarding process. According to the scheme, the water invasion sweep efficiency can be accurately calculated when the water-driven gas reservoir is abandoned, and technical support is provided for water-driven gas reservoir recovery efficiency calibration and recovery efficiency improvement work.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas reservoir development, and in particular to a determination device, electronic equipment and storage medium for water invasion sweep coefficient. Background Art

[0002] The water invasion sweep coefficient is a key parameter for calibrating the recovery factor of water-driven gas reservoirs. It is dimensionless and has a value range of 0 to 1. To a certain extent, the water invasion sweep coefficient directly determines the development effect of water-driven gas reservoirs and the final recovery factor. Therefore, accurately predicting the water invasion sweep coefficient of water-driven gas reservoirs is very important for the calibration of the recovery factor of edge and bottom water gas reservoirs and the formulation of strategies to improve the recovery factor.

[0003] At present, the water invasion sweep coefficient of water-driven gas reservoirs can only be calculated based on water invasion and water production. The relevant technology provides a calculation formula for the water invasion sweep coefficient of water-driven gas reservoirs based on dynamic water invasion and water production, which is more about the evaluation of the current water invasion sweep coefficient. Since the water invasion and water production at the time of abandonment are unclear, the water invasion sweep coefficient of water-driven gas reservoirs cannot be predicted, which directly affects the calibration of water-driven gas reservoir recovery and the evaluation of the effect of improving recovery. Therefore, it is urgent to establish a method for predicting the water invasion sweep coefficient of water-driven gas reservoirs when they are abandoned. Summary of the invention

[0004] The present invention provides a determination device, electronic equipment and storage medium for water invasion sweep coefficient, which can accurately predict the water invasion sweep coefficient when a water-driven gas reservoir is abandoned.

[0005] According to one aspect of the present invention, a method for determining a water invasion sweep coefficient is provided, comprising:

[0006] Obtain basic reservoir parameters, geological stratification data and well logging curves of water-driven gas reservoirs;

[0007] Calculating the mean permeability and thickness of each reservoir of the water-drive gas reservoir according to the geological stratification data and the well logging curve;

[0008] For each reservoir of the water-drive gas reservoir, determining the production water-gas ratio when water invades the reservoir according to the basic parameters of the reservoir, the average permeability and the thickness of the reservoir;

[0009] According to the water-gas ratio of production when water is seen in water invasion, determining water-seeking layers and water-unseeking layers when abandoned from all reservoirs of the water-drive gas reservoir;

[0010] The water invasion sweep coefficient at abandonment is calculated according to the reservoir basic parameters, the average permeability of the water-invaded unseen water layer at abandonment, and the thickness of each reservoir of the water-drive gas reservoir.

[0011] According to another aspect of the present invention, there is provided a device for determining a water invasion sweep coefficient, comprising:

[0012] Reservoir parameter acquisition module, used to obtain basic reservoir parameters, geological stratification data and logging curves of water-driven gas reservoirs;

[0013] A permeability mean calculation module, used to calculate the permeability mean and thickness of each reservoir of the water drive gas reservoir according to the geological stratification data and the well logging curve;

[0014] A production water-gas ratio determination module is used to determine the production water-gas ratio of each reservoir of the water-drive gas reservoir when water invades the reservoir according to the reservoir basic parameters, the average permeability and the thickness of the reservoir;

[0015] A reservoir classification module, for determining, from all reservoirs of the water-drive gas reservoir, water-seeking layers and water-unseeking layers when abandoned, according to the water-seeking water-gas ratio when the water-seeking water is seen;

[0016] The water invasion sweep coefficient calculation module is used to calculate the water invasion sweep coefficient at abandonment according to the reservoir basic parameters, the average permeability of the water invasion unseen water layer at abandonment and the thickness of each reservoir of the water drive gas reservoir.

[0017] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0018] at least one processor; and

[0019] a memory communicatively connected to the at least one processor; wherein,

[0020] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining the water invasion sweep coefficient described in any embodiment of the present invention.

[0021] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the water invasion sweep coefficient described in any embodiment of the present invention when executed.

[0022] The scheme for determining the water invasion sweep coefficient of the embodiment of the present invention includes: obtaining the basic reservoir parameters, geological stratification data and well logging curves of the water-driven gas reservoir; calculating the mean permeability and thickness of each reservoir of the water-driven gas reservoir according to the geological stratification data and the well logging curves; for each reservoir of the water-driven gas reservoir, determining the water-gas ratio of the production when water invades water in the reservoir according to the basic reservoir parameters, the mean permeability and thickness of the reservoir; determining the water-invaded water layer and the water-uninvaded water layer from all reservoirs of the water-driven gas reservoir according to the water-invaded water production ratio; calculating the water invasion sweep coefficient when abandoned according to the basic reservoir parameters, the mean permeability of the water-uninvaded water layer and the thickness of each reservoir of the water-driven gas reservoir. Through the technical scheme provided by the embodiment of the present invention, the water invasion sweep coefficient of the water-driven gas reservoir when abandoned can be accurately calculated, providing technical support for the calibration of the recovery rate of the water-driven gas reservoir and the work of improving the recovery rate, and effectively improving the development effect of the water-driven gas reservoir.

[0023] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a flow chart of a method for determining a water invasion sweep coefficient provided according to Embodiment 1 of the present invention;

[0026] Figure 2 is a schematic diagram of the well logging curve before reordering;

[0027] Figure 3 It is a schematic diagram of the re-arranged reservoir stratification and the water-gas ratio of production when water invades water provided by an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the corresponding relationship between the natural gas compression factor Z and the formation pressure P provided by an embodiment of the present invention;

[0029] Figure 5 is the natural gas viscosity μ provided by the embodiment of the present invention g Schematic diagram of the corresponding relationship between the pressure and the formation pressure P;

[0030] Figure 6Schematic diagram of water invasion when a water drive gas reservoir is abandoned according to an embodiment of the present invention;

[0031] Figure 7 2 is a schematic diagram of the structure of a device for determining a water invasion sweep coefficient according to a second embodiment of the present invention;

[0032] Figure 8 It is a structural schematic diagram of an electronic device for implementing the method for determining the water intrusion sweep coefficient according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Embodiment 1

[0036] Figure 1 A flow chart of a method for determining a water intrusion sweep coefficient is provided for the first embodiment of the present invention. This embodiment is applicable to the case where a water intrusion sweep coefficient is determined. The method can be executed by a device for determining a water intrusion sweep coefficient. The device for determining a water intrusion sweep coefficient can be implemented in the form of hardware and / or software. The device for determining a water intrusion sweep coefficient can be configured in an electronic device. Figure 1 As shown, the method includes:

[0037] S110. Obtain basic reservoir parameters, geological stratification data and well logging curves of the water-driven gas reservoir.

[0038] In the embodiment of the present invention, the basic reservoir parameters, geological stratification data and well logging curves of the water-driven gas reservoir are obtained, wherein the basic reservoir parameters can also be referred to as basic reservoir physical property parameters. The basic reservoir parameters may include the original gas saturation S of the reservoir. gi , gas phase relative permeability Krgi at original gas saturation, residual gas saturation S gr , Relative permeability of water phase in reservoir after water flooding K rwc , reservoir temperature T, original formation pressure P i , reservoir porosity Formation water viscosity μ w , formation water volume coefficient B w , Natural gas PVT data. Natural gas PVT data includes natural gas compressibility factor, formation pressure and natural gas viscosity.

[0039] S120, calculating the mean permeability and thickness of each reservoir of the water drive gas reservoir according to the geological stratification data and the logging curve.

[0040] In the embodiment of the present invention, the permeability mean of each reservoir of the porous water-drive gas reservoir is calculated from top to bottom according to the well logging curve and geological stratification data by using the arithmetic mean method, and the thickness of each reservoir is calculated according to the top depth and bottom depth of each reservoir. The permeability mean and thickness of each reservoir can be respectively recorded as k j and h j , where j is a serial number, taking values ​​of 1, 2, …, N, where N represents the number of geological stratification layers.

[0041] S130. For each reservoir of the water-drive gas reservoir, determine the production water-to-gas ratio when water invades the reservoir according to basic parameters of the reservoir, average permeability and thickness of the reservoir.

[0042] In an embodiment of the present invention, the water-to-gas ratio produced when water invades water in the reservoir is determined according to basic reservoir parameters, the mean permeability and thickness of each reservoir of the water-drive gas reservoir. Optionally, for each reservoir of the water-drive gas reservoir, the water-to-gas ratio produced when water invades water in the reservoir is determined according to the basic reservoir parameters, the mean permeability and thickness of the reservoir, including: sorting each reservoir of the water-drive gas reservoir in the order of the mean permeability from large to small or from small to large; determining the water-to-gas ratio produced when water invades water in each reservoir of the water-drive gas reservoir according to the basic reservoir parameters, the mean permeability and thickness of the reservoir. Exemplarily, the reservoirs are re-sorted in the order of the mean permeability of each reservoir from large to small, and the corresponding mean permeability and thickness of the re-sorted reservoirs are respectively denoted as K j and H jDue to the difference in vertical permeability of each reservoir, the layer with the highest permeability in the porous water-drive gas reservoir is the first to be invaded by water, followed by the layer with the second highest permeability, and so on. According to the order of water invasion of each reservoir, the production water-gas ratio when water invades each reservoir is calculated according to the basic parameters of the reservoir, the thickness of each reservoir, and the average permeability of each reservoir. For example, Figure 2 This is a schematic diagram of the logging curve before reordering. Figure 3 A schematic diagram of the re-arranged reservoir stratification and the production water-gas ratio when water invades water provided by an embodiment of the present invention.

[0043] Optionally, the basic reservoir parameters include gas phase relative permeability of the reservoir at original gas saturation, water phase relative permeability of the reservoir after water flooding, reservoir temperature, original formation pressure, formation water viscosity, formation water volume coefficient, natural gas volume coefficient and natural gas PVT data; the production water-to-gas ratio when water invades water in each reservoir of the water-flooded gas reservoir is determined according to the basic reservoir parameters, the average permeability and thickness of the reservoir, including: establishing a first corresponding relationship between the natural gas compression factor and the formation pressure and a second corresponding relationship between the natural gas viscosity and the formation pressure based on the natural gas PVT data; determining the natural gas compression factor according to the first corresponding relationship and the original formation pressure, and determining the natural gas viscosity according to the second corresponding relationship and the original formation pressure; determining the production water-to-gas ratio when water invades water in the reservoir according to the following formula:

[0044]

[0045]

[0046] Among them, H i represents the thickness of the i-th reservoir after sorting, μ w Indicates the formation water viscosity, K rwc represents the relative permeability of water phase in the reservoir after water flooding, B w represents the formation water volume coefficient, K rgi represents the gas phase relative permeability of the reservoir at the original gas saturation, μ g Represents the viscosity of reservoir natural gas, P i represents the original formation pressure, Z represents the reservoir natural gas compression factor, P sc Indicates standard atmospheric pressure, T sc represents the standard temperature of the oil industry, T represents the reservoir temperature, B g represents the natural gas volume coefficient, α j represents the water-gas ratio of production when water invades the jth reservoir, and N represents the total number of reservoirs.

[0047] In the embodiment of the present invention, the natural gas PVT data includes the natural gas compression factor Z, the natural gas viscosity μg and formation pressure P. Therefore, the first correspondence between natural gas compression factor Z and formation pressure P and the natural gas viscosity μ can be established based on natural gas PVT data. g and the second corresponding relationship between the formation pressure P. Exemplarily, Figure 4 A schematic diagram of the corresponding relationship between the natural gas compression factor Z and the formation pressure P provided in an embodiment of the present invention, Figure 5 The natural gas viscosity μ provided in the embodiment of the present invention g Schematic diagram of the corresponding relationship between the natural gas compression factor Z and the formation pressure P. Among them, the binomial fitting algorithm can be used to establish the first corresponding relationship between the natural gas compression factor Z and the formation pressure P and the natural gas viscosity μ g The second corresponding relationship between the natural gas compression factor Z and the formation pressure P has a fitting correlation coefficient greater than 0.90. For example, the first corresponding relationship between the natural gas compression factor Z and the formation pressure P can be expressed as: Z = 0.8084 + 0.0048P + 0.00054P 2 ; Natural gas viscosity μ g The second corresponding relationship between μ and the formation pressure P can be expressed as: g =0.01063+0.000349P; where Z represents the natural gas compression factor, f; μ g represents the viscosity of natural gas, mPa.s; P represents the formation pressure, MPa; a0, a1, a2, b0, b1, b2 are the corresponding fitting parameters respectively.

[0048] In the embodiment of the present invention, the natural gas compression factor is determined according to the first corresponding relationship and the original formation pressure, and the natural gas viscosity is determined according to the second corresponding relationship and the original formation pressure. Then, according to the natural gas compression factor and the natural gas viscosity, the production water-gas ratio when water intrudes the reservoir is determined according to the following formula: Among them, H i represents the thickness of the i-th reservoir after sorting, μ w Indicates the formation water viscosity, K rwc represents the relative permeability of water phase in the reservoir after water flooding, B w represents the formation water volume coefficient, K rgi represents the gas phase relative permeability of the reservoir at the original gas saturation, μ g Represents the viscosity of reservoir natural gas, P i represents the original formation pressure, Z represents the reservoir natural gas compression factor, P sc Indicates standard atmospheric pressure, T sc represents the standard temperature of the oil industry, T represents the reservoir temperature, B g represents the natural gas volume coefficient, α j represents the water-gas ratio of production when water invades the jth reservoir, and N represents the total number of reservoirs.

[0049] S140, according to the water-to-gas ratio of production when water is seen in water, determining the water-seeking layers when abandoned and the water-not-seeking layers when abandoned from all reservoirs of the water-drive gas reservoir.

[0050] Exemplarily, the water-gas ratio of each reservoir produced when water invades water is compared with a preset threshold value, and the reservoir whose water-gas ratio is greater than the preset threshold value is regarded as a water-invaded layer when water is abandoned, and the reservoir whose water-gas ratio is less than the preset threshold value is regarded as a water-uninvaded layer when water invades water.

[0051] Optionally, the step of determining the abandoned water-invaded water layer and the abandoned water-uninvaded water layer from all reservoirs of the water-drive gas reservoir according to the water-invaded water-gas ratio, includes: obtaining the abandoned water-gas ratio; comparing the water-invaded water-gas ratio of each reservoir of the water-drive gas reservoir with the abandoned water-gas ratio, and treating the reservoir whose water-invaded water layer is larger than the abandoned water-gas ratio as the abandoned water layer, and treating the reservoir whose water-invaded water layer is smaller than the abandoned water-gas ratio as the abandoned water layer. Exemplarily, the abandoned water-gas ratio WGR input by the user is obtained, wherein the abandoned water-gas ratio WGR can be understood as the abandoned condition of the water-drive gas reservoir. For example, the abandoned water-gas ratio WGR can be 5.0m 3 / 10 4 m 3 For each reservoir of the water-driven gas reservoir, the water-gas production ratio when water invades water and the abandoned water-gas ratio of the reservoir are compared. When the water-gas production ratio when water invades water is greater than the abandoned water-gas ratio, the reservoir is regarded as a water-invaded layer when water is abandoned. When the water-gas production ratio when water invades water is less than the abandoned water-gas ratio, the reservoir is regarded as a water-uninvaded layer when water is abandoned.

[0052] S150, calculating the water invasion sweep coefficient at the time of abandonment according to the basic reservoir parameters, the average permeability of the water-invaded unseen water layer at the time of abandonment, and the thickness of each reservoir of the water-drive gas reservoir.

[0053] Optionally, the basic reservoir parameters include the original gas saturation of the reservoir and the residual gas saturation of the reservoir after water flooding; before calculating the water invasion sweep coefficient at abandonment based on the basic reservoir parameters, the average permeability of the water-invaded unseen water layer at abandonment, and the thickness of each reservoir of the water-flooded gas reservoir, it also includes: obtaining the minimum bottom hole pressure allowed for production and water body parameters of the water-flooded gas reservoir; wherein the water body parameters of the water-flooded gas reservoir include water body multiples, pore compression coefficient, and formation water compression coefficient; according to the water body parameters of the water-flooded gas reservoir, the original gas saturation of the reservoir, the residual gas saturation of the reservoir after water flooding, and the residual gas saturation of the reservoir after water flooding; before calculating the water invasion sweep coefficient at abandonment based on the basic reservoir parameters, the average permeability of the water-invaded unseen water layer at abandonment, and the thickness of each reservoir of the water-flooded gas reservoir, it also includes: obtaining the minimum bottom hole pressure allowed for production and water body parameters of the water-flooded gas reservoir; wherein the water body parameters of the water-flooded gas reservoir include water body multiples, pore compression coefficient, and formation water compression coefficient; The method comprises: calculating the water invasion sweep coefficient at the time of abandonment according to the maximum water invasion sweep coefficient of the water-flooding gas reservoir, the gas saturation, the residual gas saturation of the reservoir after water flooding and the minimum bottom hole pressure allowed for production; and calculating the water invasion sweep coefficient at the time of abandonment according to the basic reservoir parameters, the average permeability of the unseen water layers after water flooding and the thickness of each reservoir of the water-flooding gas reservoir.

[0054] In the embodiment of the present invention, the minimum bottom hole pressure allowed for production and water body parameters of the water-driven gas reservoir input by the user are obtained, wherein the water body parameters of the water-driven gas reservoir include the water body multiple N, the pore compression coefficient C p and formation water compressibility C w , the minimum bottom hole pressure allowed for production is another abandonment condition for water-driven gas reservoirs. According to the water body parameters of porous water-driven gas reservoirs (water body multiples, pore compressibility coefficient, formation water compressibility coefficient), the original water saturation of the reservoir, the residual gas saturation after water drive, the minimum bottom hole pressure allowed for production P a , the ultimate water invasion sweep coefficient of porous water-drive gas reservoirs is calculated from the perspective of water body energy.

[0055] Optionally, the calculating the ultimate water invasion sweep coefficient of the water-drive gas reservoir according to the water body parameters of the water-drive gas reservoir, the original gas saturation of the reservoir, the residual gas saturation of the reservoir after water flooding, and the minimum bottom hole pressure allowed for production includes: calculating the ultimate water invasion sweep coefficient of the water-drive gas reservoir according to the following formula:

[0056]

[0057] Where N represents the water volume multiple, C w represents the formation water compressibility coefficient, C p represents the pore compressibility coefficient, P i represents the original formation pressure, P a Indicates the minimum bottom hole pressure allowed for production, S gi Represents the original gas saturation of the reservoir, S gr It represents the residual gas saturation of the reservoir after water flooding, and β1 represents the ultimate water invasion coefficient of the water flooding gas reservoir.

[0058] Optional. Calculate the water invasion sweep coefficient at abandonment based on the water drive gas reservoir extreme water invasion sweep coefficient, the reservoir basic parameters, the average permeability of the water invasion unseen water layer at abandonment, and the thickness of each reservoir of the water drive gas reservoir, including: calculating the water invasion sweep coefficient at abandonment based on the following formula:

[0059]

[0060] Among them, β1 represents the ultimate water invasion sweep coefficient of the water-driven gas reservoir, β2 represents the water invasion sweep coefficient when abandoned, the 1st reservoir to the nth reservoir are water-invaded water layers when abandoned, the n+1th reservoir to the Nth reservoir are water-uninvaded water layers when abandoned, H i represents the thickness of the i-th reservoir, K i represents the mean permeability of the i-th reservoir, K n+1 , represents the mean permeability of the n+1th reservoir, and N represents the total number of reservoirs in the water-driven gas reservoir.

[0061] For example, Figure 6 A schematic diagram of water invasion when a water-driven gas reservoir is abandoned according to an embodiment of the present invention.

[0062] Embodiment 2

[0063] Figure 7 This is a schematic diagram of the structure of a device for determining a water invasion sweep coefficient provided in the second embodiment of the present invention. Figure 7 As shown, the device comprises:

[0064] The reservoir parameter acquisition module 710 is used to obtain basic reservoir parameters, geological stratification data and well logging curves of water-driven gas reservoirs;

[0065] The permeability mean calculation module 720 is used to calculate the permeability mean and thickness of each reservoir of the water drive gas reservoir according to the geological stratification data and the well logging curve;

[0066] The production water-gas ratio determination module 730 is used to determine the production water-gas ratio of each reservoir of the water-drive gas reservoir when water invades the reservoir according to the reservoir basic parameters, the average permeability and the thickness of the reservoir;

[0067] A reservoir classification module 740 is used to determine the water invasion-seeing water layer and the water invasion-not-seeing water layer from all reservoirs of the water-drive gas reservoir according to the water invasion-seeing water production ratio;

[0068] The water invasion sweep coefficient calculation module 750 is used to calculate the water invasion sweep coefficient at abandonment according to the reservoir basic parameters, the average permeability of the water invasion unseen water layer at abandonment and the thickness of each reservoir of the water drive gas reservoir.

[0069] Optionally, the reservoir classification module is used to:

[0070] Get the waste water-gas ratio;

[0071] The produced water-gas ratio when water invades water of each reservoir of the water-drive gas reservoir is compared with the abandoned water-gas ratio respectively, and the reservoir whose produced water-gas ratio when water invades water is greater than the abandoned water-gas ratio is regarded as the abandoned water-invaded layer, and the reservoir whose produced water-gas ratio when water invades water is less than the abandoned water-gas ratio is regarded as the abandoned water-uninvaded layer.

[0072] Optionally, the production water-gas ratio determination module includes:

[0073] A reservoir sorting unit, used for sorting each reservoir of the water drive gas reservoir in the order of the permeability average from large to small or from small to large;

[0074] The production water-gas ratio determination unit is used to determine the production water-gas ratio when water invades water in each reservoir of the water-drive gas reservoir according to the sequence of water invasion in each reservoir of the water-drive gas reservoir, based on the reservoir basic parameters, the average permeability and the thickness of the reservoir.

[0075] Optionally, the basic reservoir parameters include gas phase relative permeability of the reservoir at original gas saturation, water phase relative permeability of the reservoir after water flooding, reservoir temperature, original formation pressure, formation water viscosity, formation water volume coefficient, natural gas volume coefficient and natural gas PVT data;

[0076] The production water-gas ratio determining unit is used for:

[0077] Based on the natural gas PVT data, a first corresponding relationship between the natural gas compressibility factor and the formation pressure and a second corresponding relationship between the natural gas viscosity and the formation pressure are established;

[0078] Determine the natural gas compression factor according to the first corresponding relationship and the original formation pressure, and determine the natural gas viscosity according to the second corresponding relationship and the original formation pressure;

[0079] The production water-gas ratio when water intrudes into water in the reservoir is determined according to the following formula:

[0080]

[0081]

[0082] Among them, H i represents the thickness of the i-th reservoir after sorting, μ w Indicates the formation water viscosity, K rwc represents the relative permeability of water phase in the reservoir after water flooding, B w represents the formation water volume coefficient, K rgirepresents the gas phase relative permeability of the reservoir at the original gas saturation, μ g Represents the viscosity of reservoir natural gas, P i represents the original formation pressure, Z represents the reservoir natural gas compression factor, P sc Indicates standard atmospheric pressure, T sc represents the standard temperature of the oil industry, T represents the reservoir temperature, B g represents the natural gas volume coefficient, α j represents the water-gas ratio of production when water invades the jth reservoir, and N represents the total number of reservoirs.

[0083] Optionally, the basic reservoir parameters include original gas saturation of the reservoir and residual gas saturation of the reservoir after water flooding;

[0084] The device also includes:

[0085] A water body parameter acquisition module is used to obtain the minimum bottom hole pressure allowed for production and water body parameters of the water-drive gas reservoir before calculating the water invasion sweep coefficient at abandonment based on the reservoir basic parameters, the average permeability of the water-invaded unseen water layer at abandonment, and the thickness of each reservoir of the water-drive gas reservoir; wherein the water body parameters of the water-drive gas reservoir include water body multiples, pore compression coefficient, and formation water compression coefficient;

[0086] The module for calculating the extreme water invasion sweep coefficient is used to calculate the extreme water invasion sweep coefficient of the water-drive gas reservoir according to the water body parameters of the water-drive gas reservoir, the original gas saturation of the reservoir, the residual gas saturation of the reservoir after water flooding and the minimum bottom hole pressure allowed for production;

[0087] The water invasion sweep coefficient calculation module includes:

[0088] The water invasion sweep coefficient calculation unit is used to calculate the water invasion sweep coefficient when abandoned according to the water drive gas reservoir limit water invasion sweep coefficient, the reservoir basic parameters, the permeability average of the water invasion unseen water layer when abandoned and the thickness of each reservoir of the water drive gas reservoir.

[0089] Optionally, the extreme water intrusion sweep coefficient calculation module is used to:

[0090] The ultimate water invasion coefficient of water-driven gas reservoirs is calculated according to the following formula:

[0091]

[0092] Where N represents the water volume multiple, C w represents the formation water compressibility coefficient, C p represents the pore compressibility coefficient, P i represents the original formation pressure, P a Indicates the minimum bottom hole pressure allowed for production, S giRepresents the original gas saturation of the reservoir, S gr It represents the residual gas saturation of the reservoir after water flooding, and β1 represents the ultimate water invasion coefficient of the water flooding gas reservoir.

[0093] Optionally, the water invasion sweep coefficient calculation unit is used to:

[0094] The water invasion coefficient during abandonment is calculated according to the following formula:

[0095]

[0096] Among them, β1 represents the ultimate water invasion sweep coefficient of the water-driven gas reservoir, β2 represents the water invasion sweep coefficient when abandoned, the 1st reservoir to the nth reservoir are water-invaded water layers when abandoned, the n+1th reservoir to the Nth reservoir are water-uninvaded water layers when abandoned, H i represents the thickness of the i-th reservoir, K i represents the mean permeability of the i-th reservoir, K n+1 , represents the mean permeability of the n+1th reservoir, and N represents the total number of reservoirs in the water-driven gas reservoir.

[0097] The device for determining the water intrusion sweep coefficient provided in the embodiment of the present invention can execute the method for determining the water intrusion sweep coefficient provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0098] Embodiment 3

[0099] Figure 8 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0100] like Figure 8As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0101] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0102] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for determining a water intrusion sweep coefficient.

[0103] In some embodiments, the method for determining the water intrusion sweep coefficient may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for determining the water intrusion sweep coefficient described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the method for determining the water intrusion sweep coefficient in any other appropriate manner (e.g., by means of firmware).

[0104] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0105] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0106] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0107] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0108] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0109] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0110] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0111] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a water invasion sweep coefficient, characterized in that: include: Obtain basic reservoir parameters, geological stratification data and well logging curves of water-driven gas reservoirs; Calculating the mean permeability and thickness of each reservoir of the water-drive gas reservoir according to the geological stratification data and the well logging curve; For each reservoir of the water-drive gas reservoir, determining the production water-gas ratio when water invades the reservoir according to the basic parameters of the reservoir, the average permeability and the thickness of the reservoir; According to the water-gas ratio of production when water is seen in water invasion, determining water-seeking layers and water-unseeking layers when abandoned from all reservoirs of the water-drive gas reservoir; The water invasion sweep coefficient at abandonment is calculated according to the reservoir basic parameters, the average permeability of the water-invaded unseen water layer at abandonment, and the thickness of each reservoir of the water-drive gas reservoir.

2. The method according to claim 1, characterized in that The step of determining the water-invaded water layer and the water-uninvaded water layer from all reservoirs of the water-drive gas reservoir according to the water-invaded water production ratio comprises: Get the waste water-gas ratio; The produced water-gas ratio when water invades water of each reservoir of the water-drive gas reservoir is compared with the abandoned water-gas ratio respectively, and the reservoir whose produced water-gas ratio when water invades water is greater than the abandoned water-gas ratio is regarded as the abandoned water-invaded layer, and the reservoir whose produced water-gas ratio when water invades water is less than the abandoned water-gas ratio is regarded as the abandoned water-uninvaded layer.

3. The method according to claim 1, characterized in that For each reservoir of the water drive gas reservoir, determining the production water-gas ratio when water invades water in the reservoir according to the reservoir basic parameters, the average permeability and the thickness of the reservoir, comprises: Sorting each reservoir of the water drive gas reservoir in the order of the permeability average from large to small or from small to large; According to the sequence of water invasion of each reservoir of the water drive gas reservoir, the production water-gas ratio when water invades the reservoir is determined according to the basic parameters of the reservoir, the average permeability and the thickness of the reservoir.

4. The method according to claim 3, characterized in that The basic reservoir parameters include the relative permeability of the gas phase of the reservoir at the original gas saturation, the relative permeability of the water phase of the reservoir after water flooding, the reservoir temperature, the original formation pressure, the viscosity of the formation water, the volume coefficient of the formation water, the volume coefficient of the natural gas and the PVT data of the natural gas; The method of determining the production water-gas ratio when water invades water in each reservoir of the water drive gas reservoir according to the sequence of water invasion in each reservoir of the water drive gas reservoir, based on the reservoir basic parameters, the average permeability and the thickness of the reservoir, comprises: Establishing a first corresponding relationship between natural gas compressibility factor and formation pressure and a second corresponding relationship between natural gas viscosity and formation pressure based on the natural gas PVT data; Determine the natural gas compression factor according to the first corresponding relationship and the original formation pressure, and determine the natural gas viscosity according to the second corresponding relationship and the original formation pressure; The production water-gas ratio when water intrudes into water in the reservoir is determined according to the following formula: Among them, H i represents the thickness of the i-th reservoir after sorting, μ w Indicates the formation water viscosity, K rwc represents the relative permeability of water phase in the reservoir after water flooding, B w represents the formation water volume coefficient, K rgi represents the gas phase relative permeability of the reservoir at the original gas saturation, μ g Represents the viscosity of reservoir natural gas, P i represents the original formation pressure, Z represents the reservoir natural gas compression factor, P sc Indicates standard atmospheric pressure, T sc represents the standard temperature of the oil industry, T represents the reservoir temperature, B g represents the natural gas volume coefficient, α j represents the water-gas ratio of production when water invades the jth reservoir, and N represents the total number of reservoirs.

5. The method according to claim 1, characterized in that: The basic reservoir parameters include the original gas saturation of the reservoir and the residual gas saturation of the reservoir after water flooding; Before calculating the water invasion sweep coefficient at abandonment according to the reservoir basic parameters, the average permeability of the water invasion unseen water layer at abandonment and the thickness of each reservoir of the water drive gas reservoir, the method further includes: Obtaining the minimum bottom hole pressure allowed for production and water body parameters of the water-driven gas reservoir; wherein the water body parameters of the water-driven gas reservoir include water body multiple, pore compressibility coefficient and formation water compressibility coefficient; Calculating the ultimate water invasion sweep coefficient of the water-drive gas reservoir according to the water body parameters of the water-drive gas reservoir, the original gas saturation of the reservoir, the residual gas saturation of the reservoir after water-drive, and the minimum bottom hole pressure allowed for production; The calculation of the water invasion sweep coefficient at the time of abandonment based on the reservoir basic parameters, the average permeability of the water invasion unseen water layer at the time of abandonment, and the thickness of each reservoir of the water drive gas reservoir comprises: The water invasion sweep coefficient at abandonment is calculated according to the extreme water invasion sweep coefficient of the water-drive gas reservoir, the basic reservoir parameters, the average permeability of the water-invasion-unseen water layer at abandonment, and the thickness of each reservoir of the water-drive gas reservoir.

6. The method according to claim 5, characterized in that The method of calculating the water invasion coefficient of the water drive gas reservoir based on the water body parameters of the water drive gas reservoir, the original gas saturation of the reservoir, the residual gas saturation of the reservoir after water drive, and the minimum bottom hole pressure allowed for production includes: The ultimate water invasion coefficient of water-driven gas reservoirs is calculated according to the following formula: Where N represents the water volume multiple, C w represents the formation water compressibility coefficient, C p represents the pore compressibility coefficient, P i represents the original formation pressure, P a Indicates the minimum bottom hole pressure allowed for production, S gi Represents the original gas saturation of the reservoir, S gr It represents the residual gas saturation of the reservoir after water flooding, and β1 represents the ultimate water invasion coefficient of the water flooding gas reservoir.

7. The method according to claim 5, characterized in that The water invasion sweep coefficient at abandonment is calculated based on the water flooding gas reservoir limit water invasion sweep coefficient, the reservoir basic parameters, the average permeability of the water invasion unseen water layer at abandonment, and the thickness of each reservoir of the water flooding gas reservoir, including: The water invasion coefficient during abandonment is calculated according to the following formula: Among them, β1 represents the ultimate water invasion sweep coefficient of the water-driven gas reservoir, β2 represents the water invasion sweep coefficient when abandoned, the 1st reservoir to the nth reservoir are water-invaded water layers when abandoned, the n+1th reservoir to the Nth reservoir are water-uninvaded water layers when abandoned, H i represents the thickness of the i-th reservoir, K i represents the mean permeability of the i-th reservoir, K n+1 , represents the mean permeability of the n+1th reservoir, and N represents the total number of reservoirs in the water-driven gas reservoir.

8. A device for determining a water invasion sweep coefficient, characterized in that: include: Reservoir parameter acquisition module, used to obtain basic reservoir parameters, geological stratification data and logging curves of water-driven gas reservoirs; A permeability mean calculation module, used to calculate the permeability mean and thickness of each reservoir of the water drive gas reservoir according to the geological stratification data and the well logging curve; A production water-gas ratio determination module is used to determine the production water-gas ratio of each reservoir of the water-drive gas reservoir when water invades the reservoir according to the reservoir basic parameters, the average permeability and the thickness of the reservoir; A reservoir classification module, for determining, from all reservoirs of the water-drive gas reservoir, water-seeking layers and water-unseeking layers when abandoned, according to the water-seeking water-gas ratio when the water-seeking water is seen; The water invasion sweep coefficient calculation module is used to calculate the water invasion sweep coefficient at abandonment according to the reservoir basic parameters, the average permeability of the water invasion unseen water layer at abandonment and the thickness of each reservoir of the water drive gas reservoir.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the method for determining the water invasion sweep coefficient according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the water invasion sweep coefficient according to any one of claims 1 to 7 when the processor executes the instructions.

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