Carbonate well group water injection monitoring method, system, equipment and medium

Abstract

The invention provides a carbonatite well group water injection monitoring method, system, equipment and medium, and the method comprises the following steps: drawing a relation curve of pressure drop-accumulated liquid production capacity corresponding to each pressure drop by using historical pressure measurement data points of a well group, and fitting a scatter point straight line relation to obtain a ground crude oil elastic yield; obtaining daily formation pressure based on the ground crude oil elastic yield; the underground elastic yield is obtained based on the ground crude oil elastic yield, the daily stratum energy supplement value is obtained based on the underground elastic yield, the daily lost stratum energy is obtained based on the daily stratum energy supplement value and the daily stratum pressure, and the predicted stratum pressure after water injection is obtained; establishing a well group water injection monitoring curve by taking the horizontal axis as time and the predicted formation pressure and the water injection rate as main and auxiliary coordinates, and comparing the predicted formation pressure and the actually measured formation pressure according to scattering points of the actually measured formation pressure to complete well group water injection monitoring; the formation pressure after water injection is predicted in real time based on the pressure measurement data before water injection, and the water injection state is accurately mastered.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas reservoir development, and in particular relates to a carbonate well group water injection monitoring method, system, equipment and medium. Background Art

[0002] At present, carbonate well group water injection is an emerging development technology. With the densification of well networks, the number of connected well groups increases. Therefore, dynamic monitoring and adjustment of well group water injection plays an important role in water injection and production. However, in the field of carbonate oil and gas field development, there is no relevant technology for well group water injection regulation using material balance equations. At present, there are only general parameters such as injection-production ratio, oil production intensity, and water injection intensity for well group water injection regulation. It is impossible to grasp the development trend of well group water injection, nor can it achieve precise regulation. At present, it only relies on the experience and judgment of reservoir engineers, and cannot make quantitative judgments. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a carbonate well group water injection monitoring method, system, equipment and medium, which can use the pressure measurement data before water injection to carry out real-time prediction of formation pressure after water injection, so as to accurately grasp the water injection status.

[0004] The present invention is achieved through the following technical solutions:

[0005] A method for monitoring water injection in a carbonate well group comprises the following steps:

[0006] The relationship curve between pressure drop and cumulative liquid production corresponding to each pressure drop is drawn using the historical pressure measurement data points of the well group, and the scattered point straight line relationship is fitted to obtain the elastic yield of the ground crude oil; the daily formation pressure is obtained in turn based on the elastic yield;

[0007] Based on the scatter plot of volume coefficient and formation pressure of the well PVT data, a BP relationship curve is made;

[0008] Based on the elastic yield of crude oil, the underground elastic yield is obtained, based on the underground elastic yield, the daily formation energy replenishment value is obtained, based on the daily formation energy replenishment value and the daily formation pressure, the daily lost formation energy is obtained, and the predicted formation pressure after water injection is obtained;

[0009] Draw a curve on a daily basis, with time as the horizontal axis and the predicted formation pressure and water injection volume as the main and secondary coordinates. Establish a well group water injection monitoring curve, scatter points of the measured formation pressure, compare the predicted formation pressure with the measured formation pressure, and complete the well group water injection monitoring.

[0010] Further, the daily formation pressure obtained based on the elastic yield is Pq-Q / K;

[0011] Among them, Pq is the formation pressure yesterday, Pq = Pi (original formation pressure) on the first day of production, Q is the daily liquid production, and K is the elastic yield of surface crude oil;

[0012] The daily formation pressure must be obtained up to the day before water injection of the well.

[0013] Furthermore, the BP relationship curve is: y=a*Pq+b, where a is the slope coefficient, Pq is yesterday's formation pressure, Pq=Pi on the first day of production, Pi is the original formation pressure, b is the straight line intercept, and y is the volume coefficient under the Pq formation pressure state.

[0014] Furthermore, the elastic output is:

[0015] Kw=K / ρo*y;

[0016] Among them, Kw is the elastic yield at the wellhead converted to the underground volume elastic yield, and ρo is the density of the ground crude oil.

[0017] Further, the daily formation energy supplement value is: Iw*Bw / Kw;

[0018] Among them, Iw is the daily water injection volume, Bw is the volume coefficient of water, and Kw is the elastic yield at the wellhead converted to the underground volume elastic yield.

[0019] Furthermore, the predicted formation pressure is Pq+Iw*Bw / Kw-Q / K, wherein Pq is yesterday's formation pressure, Pq=Pi (original formation pressure) on the first day of production, Iw is daily water injection volume, Bw is the volume coefficient of water, Kw is the elastic yield of the wellhead converted to the underground volume elastic yield, and K is the elastic yield of ground crude oil.

[0020] Furthermore, the measured formation pressure is:

[0021]

[0022] Where N is geological reserves, N P is the cumulative oil production in the stage, B o is the volume coefficient under the stage cumulative oil production state, B oi is the original volume coefficient of crude oil; C t is the comprehensive compression coefficient; △P is the original formation pressure minus the current formation pressure;

[0023] If the measured formation pressure is greater than the predicted formation pressure, the water injection intensity is too high and the injection-production ratio needs to be adjusted to return to a reasonable pressure. If the measured formation pressure is less than the predicted formation pressure, the water injection intensity should be increased.

[0024] A carbonate well group water injection monitoring system, comprising:

[0025] The preprocessing module is used to draw a relationship curve between pressure drop and cumulative liquid production corresponding to each pressure drop using historical pressure measurement data points of the well group, and fit the scattered point straight line relationship to obtain the elastic yield of the ground crude oil; and obtain the daily formation pressure in turn based on the elastic yield;

[0026] The calculation module is used to make a BP relationship curve based on the scatter plot of the volume coefficient and formation pressure of the well PVT data;

[0027] A prediction module, used to obtain the underground elastic yield based on the elastic yield of crude oil, obtain the daily formation energy replenishment value based on the underground elastic yield, obtain the daily lost formation energy based on the daily formation energy replenishment value and the daily formation pressure, and obtain the predicted formation pressure after water injection;

[0028] The judgment module is used to draw curves on a daily basis, with time as the horizontal axis and the predicted formation pressure and water injection volume as the main and secondary coordinates, to establish a well group water injection monitoring curve, scatter points of the measured formation pressure, compare the predicted formation pressure with the measured formation pressure, and complete the well group water injection monitoring.

[0029] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of a carbonate well group water injection monitoring method are implemented.

[0030] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of a carbonate well group water injection monitoring method are implemented.

[0031] Compared with the prior art, the present invention has the following beneficial technical effects:

[0032] The present invention provides a carbonate rock well group water injection monitoring method, system, equipment and medium, comprising the following steps: using the historical pressure measurement data points of the well group to draw a relationship curve between the pressure drop and the cumulative liquid production corresponding to each pressure drop, and fitting the scattered point straight line relationship to obtain the surface crude oil elastic yield. The present application adopts the method of fitting scattered points to obtain a unified surface crude oil elastic yield under different situations, and then the influencing factors under various situations can be apportioned, so that a relatively accurate surface crude oil elastic yield can be obtained as a whole; based on the surface crude oil elastic yield, daily formation pressure is obtained; based on the surface crude oil elastic yield, underground elastic yield is obtained, based on the underground elastic yield, daily formation energy replenishment value is obtained, and based on the daily formation energy replenishment value and daily formation The pressure is used to obtain the daily loss of formation energy and the predicted formation pressure after water injection; the horizontal axis is time, the predicted formation pressure and injection volume are used as the main and secondary coordinates, a well group water injection monitoring curve is established, the scatter points of the measured formation pressure are compared with the predicted formation pressure and the measured formation pressure, and the well group water injection monitoring is completed. The water drive situation can be better reflected according to the predicted bottom pressure and the measured formation pressure. Compared with the existing technology, the present application can judge the development trend of water injection in real time and achieve precise regulation based on specific values; the present application adopts the material balance equation and uses the pressure measurement data before water injection to carry out real-time prediction of formation pressure after water injection, so as to accurately grasp the water injection status and provide guiding opinions on well group water injection for relevant technical personnel in this field. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of a carbonate well group water injection monitoring method of the present invention;

[0034] Figure 2 It is a relationship curve diagram of the pressure drop and the cumulative liquid production corresponding to each pressure drop in a specific embodiment of the present invention;

[0035] Figure 3 It is a BP relationship curve diagram in a specific embodiment of the present invention;

[0036] Figure 4 It is a water injection monitoring curve diagram of a well group in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0038] 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.

[0039] 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.

[0040] The present invention provides a method for monitoring water injection in a carbonate well group. Figure 1 As shown, the following steps are included:

[0041] The relationship curve between pressure drop and cumulative liquid production corresponding to each pressure drop is drawn using the historical pressure measurement data points of the well group, and the scattered point straight line relationship is fitted to obtain the elastic yield of the surface crude oil; the daily formation pressure is obtained based on the elastic yield of the surface crude oil;

[0042] Based on the elastic yield of the surface crude oil, the underground elastic yield is obtained, based on the underground elastic yield, the daily formation energy replenishment value is obtained, based on the daily formation energy replenishment value and the daily formation pressure, the daily lost formation energy is obtained, and the predicted formation pressure after water injection is obtained;

[0043] With time as the horizontal axis, and predicted formation pressure and water injection volume as the main and secondary coordinates, a well group water injection monitoring curve is established, and the scatter points of the measured formation pressure are compared with the predicted formation pressure to complete the well group water injection monitoring.

[0044] Preferably, the daily formation pressure obtained in sequence based on the elastic yield is Pq-Q / K;

[0045] Among them, Pq is the formation pressure yesterday, Pq = Pi (original formation pressure) on the first day of production, Q is the daily liquid production, and K is the elastic yield of surface crude oil;

[0046] The daily formation pressure must be obtained up to the day before water injection of the well.

[0047] Preferably, it also includes making a BP relationship curve based on the scatter plot of the volume coefficient and formation pressure of the well PVT data, and establishing a relationship between the crude oil volume coefficient and the formation pressure to obtain the volume coefficient at each pressure value, wherein the BP relationship curve is: y=a*Pq+b,

[0048] Among them, a is the slope coefficient, q is yesterday's formation pressure, Pq=Pi on the first day of production, Pi is the original formation pressure, b is the straight line intercept, and y is the volume coefficient under the Pq formation pressure state.

[0049] Preferably, the elastic yield is:

[0050] Kw=K / ρo*y;

[0051] Among them, Kw is the elastic yield at the wellhead converted to the underground volume elastic yield, and ρo is the density of crude oil.

[0052] Preferably, the daily formation energy supplement value is: Iw*Bw / Kw;

[0053] Among them, Iw is the daily water injection volume, Bw is the volume coefficient of water, and Kw is the elastic yield at the wellhead converted to the underground volume elastic yield.

[0054] Preferably, the predicted formation pressure is Pq+Iw*Bw / Kw-Q / K, wherein Pq is yesterday's formation pressure, Pq=Pi (original formation pressure) on the first day of production, Iw is daily water injection volume, Bw is the volume coefficient of water, Kw is the elastic yield of the wellhead converted to the underground volume elastic yield, Q is the daily liquid production, and K is the elastic yield of ground crude oil.

[0055] Preferably, the measured formation pressure is:

[0056]

[0057] Where N is geological reserves, N P is the cumulative oil production in the stage, B o is the volume coefficient under the stage cumulative oil production state, B oi is the original volume coefficient of crude oil; C t is the comprehensive compression coefficient; △P is the original formation pressure minus the current formation pressure;

[0058] If the measured formation pressure is greater than the predicted formation pressure, the water injection intensity is too high and the injection-production ratio needs to be adjusted to return to a reasonable pressure. If the measured formation pressure is less than the predicted formation pressure, the water injection intensity should be increased.

[0059] Specifically, it is currently believed that the best situation is when the measured formation pressure is close to the predicted formation pressure. Therefore, we can use the measured formation static pressure to scatter points on the monitoring curve. If it is higher than the curve, it means that the water injection intensity is too high and the injection-production ratio needs to be adjusted to return to a reasonable pressure. If it is lower than the predicted curve, energy needs to be added.

[0060] If long-term use of unreasonable injection-production ratio for water injection leads to the measured formation pressure being much higher than the predicted formation pressure, there is a risk of water breakthrough and part of the dynamic reserves will be lost. However, due to the low water content, the dynamic reserves cannot be calculated using the Type C curve. Kw=K / ρo*y can be used to reversely calculate K so that Pq calculated by K is equal to the measured formation pressure, and then the material balance equation is used to calculate the dynamic reserves N' after water injection, and the dynamic reserve loss △N=N-N'. It should be noted that those skilled in the art can use this curve to set the injection amount for different stages and different oil production intensities.

[0061] Embodiment 1:

[0062] Take a well group in Fuman Oilfield as an example:

[0063] (1) Draw a relationship curve between △P and Np, that is, a relationship curve between pressure drop and the cumulative liquid production corresponding to each pressure drop; the data of pressure drop and the cumulative liquid production corresponding to each pressure drop are shown in Table 1:

[0064] Table 1

[0065]

[0066]

[0067] Fitting a scattered straight line relationship, such as Figure 2 As shown in Table 2, the elastic yield K = 3998.2 is obtained; (2) the predicted formation pressure is calculated, as shown in Table 2:

[0068] Table 2

[0069]

[0070] (3) Calculate the relationship between the compression coefficient and the formation pressure, as shown in Table 3:

[0071] Table 3

[0072]

[0073]

[0074] like Figure 3 As shown, the obtained BP relationship curve is y=-0.0033+1.7707;

[0075] (4) Calculate Kw = K / ρo*(y = a*Pq+b) = 3998 / 0.82*(-0.0033*Pq+1.7707). This value varies with the formation pressure. On the first day of water injection, Pq = 44.797 MPa.

[0076] Iw=Iw*1.05 / Kw,

[0077] Pb=Pq+Iw*1.05 / Kw-Q / K,

[0078] Table 3

[0079]

[0080] The collected data in this embodiment, as shown in Table 3, is used to calculate the daily lost formation energy, predicted formation pressure, actual formation pressure and diffuse energy after water injection;

[0081] Iw=Daily water injection*1.05 / Kw

[0082] Pb=Pq+daily water injection*1.05 / Kw-Q / K

[0083] (5) Draw a curve on a daily basis, with the horizontal axis representing time, the vertical axis representing the primary coordinate of the formation pressure, and the secondary coordinate representing the water injection volume (the primary and secondary coordinates can be adjusted). Then, scatter the measured formation pressure points. At this point, the well group water injection monitoring curve is completed.

[0084] (6) According to the above figure, Figure 4 As shown, it can be found that the measured formation pressure is significantly higher than the predicted curve, and the formation pressure should be appropriately reduced. Therefore, Well1 is used to switch to production and gradually return to a reasonable formation pressure. The geological reserves before water injection are calculated using relevant parameters N = 3960*1.6235 / 1.4839 / 16.6941 = 2.563 million tons, and then K is reversed by K to make the formation pressure calculated by K' equal to the most recent measured formation pressure. After reverse calculation, K' = 2950, ​​N' = 2950*1.6235 / 1.4839 / 16.6941 = 1.933 million tons, △N = N-N' = 630,000 tons. According to the recovery rate of 15%, the expected increase in crude oil production = 63*0.15 = 94,500 tons.

[0085] The present invention provides a carbonate well group water injection monitoring system, comprising:

[0086] The preprocessing module is used to draw a relationship curve between pressure drop and cumulative liquid production corresponding to each pressure drop using historical pressure measurement data points of the well group, and fit the scattered point straight line relationship to obtain the elastic yield of the ground crude oil; and obtain the daily formation pressure in turn based on the elastic yield;

[0087] A prediction module, for obtaining an underground elastic yield based on the surface elastic yield of crude oil, obtaining a daily formation energy replenishment value based on the underground elastic yield, obtaining a daily lost formation energy based on the daily formation energy replenishment value and the daily formation pressure, and obtaining a predicted formation pressure after water injection;

[0088] The judgment module is used to draw curves on a daily basis, with time as the horizontal axis and the predicted formation pressure and water injection volume as the main and secondary coordinates, to establish a well group water injection monitoring curve, scatter points of the measured formation pressure, compare the predicted formation pressure with the measured formation pressure, and complete the well group water injection monitoring.

[0089] In another embodiment of the present invention, a computer device is provided, the computer device comprising a processor and a memory, the memory is used to store a computer program, the computer program comprises program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, which are suitable for implementing one or more instructions, and are specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the operation of a carbonate well group water injection monitoring method.

[0090] In another embodiment of the present invention, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the above-mentioned embodiment of a carbonate well group water injection monitoring method.

[0091] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0092] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0093] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring water injection in a carbonate well group, characterized in that: The following steps are involved: The relationship curve between pressure drop and cumulative liquid production corresponding to each pressure drop is drawn using the historical pressure measurement data points of the well group, and the scattered point straight line relationship is fitted to obtain the elastic yield of the surface crude oil; The daily formation pressure is obtained based on the elastic yield of crude oil on the surface; Based on the elastic yield of the surface crude oil, the underground elastic yield is obtained, based on the underground elastic yield, the daily formation energy replenishment value is obtained, based on the daily formation energy replenishment value and the daily formation pressure, the daily lost formation energy is obtained, and the predicted formation pressure after water injection is obtained; With time as the horizontal axis, and predicted formation pressure and water injection volume as the main and secondary coordinates, a well group water injection monitoring curve is established, and the scatter points of the measured formation pressure are compared with the predicted formation pressure to complete the well group water injection monitoring.

2. A carbonate well group water injection monitoring method according to claim 1, characterized in that: The daily formation pressure obtained based on the elastic yield is Pq-Q / K; Among them, Pq is the formation pressure yesterday, Pq = Pi (original formation pressure) on the first day of production, Q is the daily liquid production, and K is the elastic yield of surface crude oil; The daily formation pressure must be obtained up to the day before water injection of the well.

3. A carbonate well group water injection monitoring method according to claim 1, characterized in that: It also includes making a BP relationship curve based on a scatter plot of the volume coefficient and formation pressure of the well PVT data, establishing a relationship between the crude oil volume coefficient and the formation pressure, and obtaining the volume coefficient at each pressure value. The BP relationship curve is: y=a*Pq+b, wherein a is the slope coefficient, Pq is yesterday's formation pressure, Pq=Pi on the first day of production, Pi is the original formation pressure, b is the straight line intercept, and y is the volume coefficient under the Pq formation pressure state.

4. A carbonate well group water injection monitoring method according to claim 3, characterized in that: The elastic output is: Kw=K / ρo*y; Among them, Kw is the elastic yield at the wellhead converted to the underground volume elastic yield, and ρo is the density of the ground crude oil.

5. A carbonate well group water injection monitoring method according to claim 1, characterized in that: The daily formation energy supplement value is: Iw*Bw / Kw; Among them, Iw is the daily water injection volume, Bw is the volume coefficient of water, and Kw is the elastic yield at the wellhead converted to the underground volume elastic yield.

6. A carbonate well group water injection monitoring method according to claim 1, characterized in that: The predicted formation pressure is Pq+Iw*Bw / Kw-Q / K, wherein Pq is yesterday's formation pressure, Pq=Pi (original formation pressure) on the first day of production, Iw is the daily water injection volume, Bw is the volume coefficient of water, Kw is the elastic yield at the wellhead converted to the elastic yield under formation conditions, and K is the elastic yield of ground crude oil.

7. A carbonate well group water injection monitoring method according to claim 1, characterized in that: The measured formation pressure is: Where N is geological reserves, N P is the cumulative oil production in the stage, B o is the volume coefficient under the stage cumulative oil production state, B oi is the original volume coefficient of crude oil; C t is the comprehensive compression coefficient; △P is the original formation pressure minus the current formation pressure; If the measured formation pressure is greater than the predicted formation pressure, the water injection intensity is too high and the injection-production ratio needs to be adjusted to return to a reasonable pressure. If the measured formation pressure is less than the predicted formation pressure, the water injection intensity should be increased.

8. A carbonate well group water injection monitoring system, characterized in that: A carbonate well group water injection monitoring method according to any one of claims 1 to 7, comprising: The preprocessing module is used to draw a relationship curve between pressure drop and cumulative liquid production corresponding to each pressure drop using historical pressure measurement data points of the well group, and fit the scattered point straight line relationship to obtain the elastic yield; and obtain the daily formation pressure in turn based on the elastic yield; A prediction module, used to obtain the underground elastic yield based on the elastic yield of crude oil, obtain the daily formation energy replenishment value based on the underground elastic yield, obtain the daily lost formation energy based on the daily formation energy replenishment value and the daily formation pressure, and obtain the predicted formation pressure after water injection; The judgment module is used to draw curves on a daily basis, with time as the horizontal axis and the predicted formation pressure and water injection volume as the main and secondary coordinates, to establish a well group water injection monitoring curve, scatter points of the measured formation pressure, compare the predicted formation pressure with the measured formation pressure, and complete the well group water injection monitoring.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for monitoring water injection in a carbonate well group as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of a carbonate well group water injection monitoring method as described in any one of claims 1 to 7 are implemented.

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