A method and apparatus for calculating the reserves of fractured-solution oil reservoirs

Abstract

This invention provides a method, apparatus, computer-readable storage medium, and electronic device for calculating the reserves of fractured-karst reservoirs. The method includes constructing a single-system and multiple-system of a target well, wherein the single-system includes a cave system directly connected to the wellbore of the target well, and the multiple-system includes a cave system connected to the single-system through fractures; establishing a comprehensive production model of the target well utilizing multiple systems based on the principle of mass balance, wherein the comprehensive production of the target well utilizing multiple systems is related to the fluid supply of the single-system and the fluid supply of the multiple systems; determining various parameters of the comprehensive production model of the target well utilizing multiple systems by fitting based on the dynamic production data of the target well, and then inverting the dynamic reserves of the target well based on the various parameters.

Description

Technical Field

[0001] This invention relates to the field of oil and gas seismic exploration technology, and in particular to a method, apparatus, computer-readable storage medium, and electronic device for calculating the reserves of fractured-dissolved oil reservoirs. Background Technology

[0002] Under the combined geological effects of different tectonic phases, varying stress magnitudes and directions, and multiple compressions, the carbonate rocks in Shunbei were subjected to the upward migration of deep hydrothermal fluids along steep faults. This caused the strata between the faults to break up, and the caves or fissures were further dissolved and modified, eventually forming a closed fault-controlled trap. Later, oil and gas were released from the deep source rocks and migrated upward along the steep faults, accumulating in the fault-controlled trap to form a special type of oil and gas reservoir called a fault-dissolved oil and gas reservoir.

[0003] Fault-solved reservoirs are a special type of reservoir, whose reservoir space mainly consists of fractured bodies between faults. Drilling data shows that these fractured bodies are composed of fractures, small caverns, and matrix. Fault-solved reservoirs have high production rates. The exploration breakthrough in the Shunbei Oilfield in 2015 further confirmed the existence and development potential of fault-solved reservoirs. Compared with other fracture-vuggy reservoirs, fault-solved reservoirs are more unique. Their geological characteristics and reservoir formation patterns are controlled by faults, and they are also affected by upper freshwater and lower hydrothermal karst processes. Therefore, the formation of fault-solved reservoirs is characterized by multiple phases and diverse reservoir spatial distribution. Initial production of fault-solved reservoirs is generally high, and depletion-type development is typically employed in the field. Therefore, in terms of reserve utilization, the primary reliance is on the expansion energy of the cavern system near the wellbore, followed by fluid supply from the cavern system further offshore.

[0004] Dynamic reserves, also known as dynamic geological reserves or dynamic method geological reserves, are the geological reserves of a single well or oil and gas reservoir calculated using dynamic data through dynamic methods. They represent the portion of geological reserves controlled by the oil and gas reservoir or well production process. Dynamic reserves can be divided into two categories according to the calculation method, as shown in Table 1: one category is pressure-related, such as the mass balance equation method, and the other category is pressure-independent, such as the water drive characteristic curve method.

[0005] Table 1 Summary of Dynamic Reserve Calculation Methods

[0006]

[0007] For porous clastic reservoirs, dynamic methods for calculating recoverable reserves are feasible when development data is abundant. However, in the early to mid-stages of development, insufficient dynamic data often limits the field application of dynamic methods. In such cases, static volumetric methods are used to calculate the scale of recoverable geological reserves per well, thereby evaluating the extent to which the well network utilizes geological reserves. For relatively homogeneous porous clastic reservoirs, the spatial distribution of the reservoir is relatively clear, and the inter-well extrapolation area method is feasible for calculating the controlled geological reserves of a single well. However, for severely heterogeneous fractured-dissolved reservoirs, the heterogeneity and spatial continuity of the reservoir's spatial distribution vary greatly. While the vertical distribution of reservoirs encountered in a single well can be determined through logging, drilling, and well logging data, the planar distribution of reservoirs is difficult to predict accurately. The conventional inter-well extrapolation area method for clastic reservoirs is unsuitable for determining the control area of ​​wells in fractured-vuggy reservoirs. Therefore, the application of volumetric methods for calculating recoverable geological reserves per well based on static data is limited.

[0008] In summary, although there are many methods for calculating dynamic reserves, their application in fractured solution reservoirs still has certain limitations, as shown in Table 2.

[0009] Table 2 Applicability of different methods in fractured solution reservoirs

[0010]

[0011] The geological reserves calculated using the mass balance equation method represent the reserves within the pressure wave range. Water injection indicator curves are applicable to water injection wells, while energy indicator curves are applicable to production wells. Both can be used to calculate single wells or units. Their applicability includes:

[0012] (1) The injection volume (production volume, water cut) is relatively stable. An increase in the injection volume will lead to an increase in the bottom hole flowing pressure and an upward tilt in the injection indicator curve; an increase in the production volume may lead to a decrease in the bottom hole flowing pressure and a downward tilt in the energy indicator curve.

[0013] (2) Applicable to relatively closed units. In multi-well interconnected units, the interference between wells is severe, and the calculation results of a single well will deviate from reality.

[0014] (3) Applicable to single wells or units with varying pressures.

[0015] (4) The compression coefficient has a significant impact on the calculation results (1×10-3MPa-1, 4.5×10-3MPa-1).

[0016] Applicable conditions for the water drive characteristic curve method:

[0017] (1) A straight line segment appears.

[0018] (2) In the stable displacement stage. To calculate the geological reserves for water-driven displacement using the water-drive characteristic curve, it is necessary to ensure that the water-driven displacement has entered a stable stage. There are two requirements: first, the formation pressure is basically stable; second, the geological reserves for water-driven displacement are basically stable (that is, a straight line segment appears). For this reason, it is traditionally believed that the water content can only be used when it is above 40%.

[0019] (3) The calibration of the proportional coefficient is crucial.

[0020] Patent document CN 105464652 A discloses a method and system for calculating dynamic reserves of fractured-vuggy carbonate reservoirs. This method, based on fractured-vuggy unit division and mass balance equations, uses dynamic production data to determine dynamic reserves. However, the dynamic reserve calculation involves the water-oil volume ratio, but this method directly sets the water-oil volume ratio to 1, ignoring changes in the water-oil volume ratio due to extraction and the impact of water level rise. From a dynamic development perspective, setting the water-oil volume ratio as a constant is unscientific. Therefore, the calculated reserves contain a certain degree of error. Summary of the Invention

[0021] To address the aforementioned problems, embodiments of the present invention provide a method, apparatus, computer-readable storage medium, and electronic device for calculating the reserves of broken-solution reservoirs.

[0022] In a first aspect, embodiments of the present invention provide a method for calculating the reserves of a fractured solution reservoir, comprising:

[0023] S100, construct a set of systems and multiple sets of systems for the target well, wherein the set of systems includes a cave system directly connected to the wellbore of the target well, and the multiple sets of systems include a cave system connected to the set of systems through fractures;

[0024] S200, Based on the principle of material balance, establish a comprehensive production model for the target well using multiple systems, wherein the comprehensive production of the target well using multiple systems is related to the fluid supply of one system and the fluid supply of multiple systems of the target well.

[0025] S300: Based on the dynamic production data of the target well, the parameters of the comprehensive production model of the target well using multiple bodies are determined by fitting, and then the dynamic reserves of the target well are inverted based on the parameters.

[0026] According to an embodiment of the present invention, in step S200 above, establishing a comprehensive production model for the target well using multiple bodies based on the principle of material balance includes the following steps:

[0027] S210, the fluid supply of a single system in the target well is approximated as the fluid supply from the near-wellbore area at the bottom of the target well to the wellbore; the fluid supply of multiple systems in the target well is approximated as the fluid supply from the far-wellbore area at the bottom of the target well to the wellbore.

[0028] S220, based on the principle of material balance, establish a near-wellbore production model related to fluid supply from the near-wellbore area to the wellbore and a far-wellbore production model related to fluid supply from the far-wellbore area to the wellbore.

[0029] S230, Differentiate and integrate the near-wellbore production model and the far-wellbore production model to establish the integrated production model.

[0030] According to an embodiment of the present invention, the near-wellbore zone and far-wellbore zone at the bottom of the target well are divided based on the pressure propagation distance condition.

[0031] According to an embodiment of the present invention, the pressure propagation distance condition includes the pressure in the near-wellbore region being greater than the saturation pressure, and the pressure in the far-wellbore region being less than the saturation pressure.

[0032] According to an embodiment of the present invention, the pressure is determined based on the bottom hole flowing pressure, which is determined based on the wellhead oil pressure.

[0033] According to an embodiment of the present invention, in step S300 above, based on the dynamic production data of the target well, the parameters of the comprehensive production model of the target well using multiple bodies are determined by fitting, and then the dynamic reserves of the target well are inverted based on the parameters, including the following steps:

[0034] S310, Based on the early dynamic production data of the target well, the relevant parameters of the near-wellbore production model are determined by curve fitting;

[0035] S320, based on the late-stage dynamic production data of the target well, the relevant parameters of the far-well production model are determined by curve fitting;

[0036] S330, based on the relevant parameters of the near-wellbore production model and the relevant parameters of the far-wellbore production model, invert the near-wellbore fluid supply and the far-wellbore fluid supply;

[0037] S340 determines the dynamic reserves of the target well based on the fluid supply in the near-wellbore area and the fluid supply in the far-wellbore area.

[0038] According to an embodiment of the present invention, after step S320 and before step S330, the method further includes the following step:

[0039] S325. Based on the relevant parameters of the near-wellbore production model and the far-wellbore production model, calculate the pressure in the near-wellbore area and the pressure in the far-wellbore area, and verify whether the pressure in the near-wellbore area and the pressure in the far-wellbore area meet the pressure propagation distance condition. If not, return to step S310 to refit until the pressure propagation distance condition is met.

[0040] Secondly, the present invention also provides an apparatus for calculating the reserves of a fractured solution reservoir, characterized in that it comprises:

[0041] The system construction module is used to construct a single-body system and multiple-body systems for the target well. The single-body system includes a cave system directly connected to the wellbore of the target well, and the multiple-body systems include a cave system connected to the single-body system through fractures.

[0042] The model building module is used to establish a comprehensive production model of the target well using multiple systems based on the principle of material balance. The comprehensive production of the target well using multiple systems is related to the fluid supply of the target well's single-system system and the fluid supply of the multi-system system.

[0043] The fitting calculation module is used to determine the parameters of the comprehensive production model of the target well using multiple bodies by fitting the dynamic production data of the target well, and then invert the dynamic reserves of the target well based on the parameters.

[0044] Thirdly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for calculating the reserves of a fractured solution reservoir as described in the first aspect above.

[0045] Fourthly, embodiments of the present invention provide an electronic device comprising: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured to execute the instructions to implement a method for calculating the reserves of a fractured solution reservoir as described in the first aspect above.

[0046] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial effects:

[0047] 1) The method for calculating the reserves of a fractured-dissolved reservoir using multiple reservoir groups provided in this embodiment of the invention is applicable to any stage of the development of fractured-dissolved reservoirs. This method is applicable not only to the reserve calculation of a single reservoir group but also to the reserve calculation of multiple reservoir groups.

[0048] 2) The present invention provides a method for calculating the reserves of a fault-dissolved oil reservoir using multiple reservoir sets. This method comprehensively utilizes dynamic production data to calculate the reserves of the fault-dissolved oil reservoir in real time. It has the characteristics of solid theoretical foundation, strong systematicity, ease of use and clear results.

[0049] 3) The method for calculating the reserves of a fractured solution reservoir using multiple reservoir sets provided in this embodiment of the invention not only considers the impact of the production of karst caves near the bottom of the well on the flow rate, but also considers the fluid supply from karst caves at the far end. The model design is closer to the actual production practice in the field, and the calculated reserves are more able to reflect the real situation of the underground reservoir.

[0050] 3) The method for calculating the reserves of a fractured solution reservoir using multiple reservoir sets provided in this embodiment of the invention not only overcomes the time-domain limitations of simply relying on the energy indicator curve of elastic drive to determine the reserves, but also simplifies the reserve calculation process and effectively solves the problem of the difficulty in calculating the reserves of fractured solutions in the field.

[0051] 4) The present invention provides a method for calculating the reserves of multiple reservoirs in a fractured-dissolved reservoir, which facilitates the calculation and evaluation of reserves in the later stage of fractured-dissolved reservoir development, and provides technical support for the utilization and evaluation of reserves in the later stage of fractured-dissolved reservoir development.

[0052] 5) The method for calculating the reserves of a fractured solution reservoir using multiple reservoirs provided in this embodiment of the invention can also indirectly determine the real-time production decline rate of the fractured solution reservoir, providing a theoretical basis for the comprehensive management scheme of a single well. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This diagram illustrates the activation of multiple caverns in a fractured solution reservoir according to Embodiment 1 of the present invention.

[0055] Figure 2 This shows a simplified schematic diagram of the operation of multiple caverns in a fractured solution reservoir according to Embodiment 1 of the present invention;

[0056] Figure 3 The flowchart of the reserve calculation method according to Embodiment 1 of the present invention is shown;

[0057] Figure 4 The diagram shows the dynamic production curve of well M according to Embodiment 1 of the present invention;

[0058] Figure 5 The figure shows the fitting curves of parameters A1 and D1 in Embodiment 1 of the present invention;

[0059] Figure 6 The figure shows the fitting curves of parameters A2 and D2 in Embodiment 1 of the present invention;

[0060] Figure 7 A schematic diagram of the model verification structure of Embodiment 1 of the present invention is shown;

[0061] Figure 8 A schematic diagram of the electronic device according to Embodiment 4 of the present invention is shown. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] Example 1

[0064] To address the aforementioned issues, this embodiment proposes a novel method for calculating the reserves of fractured-dissolve reservoirs. This method first clarifies the concepts of a single-system and multiple-system fractured-dissolve reservoirs. Then, from a material balance perspective, the scenario of utilizing multiple systems in a fractured-dissolve reservoir is divided into zones (e.g., near-wellbore zone and far-wellbore zone). Production models are established for each zone, leading to a comprehensive production model under multiple system utilization. Finally, the parameters of the comprehensive production model are fitted using dynamic production data, and the dynamic reserves are determined based on these parameters.

[0065] The working principle and implementation process of this method are explained in detail below.

[0066] The method for calculating the reserves of fractured solution reservoirs proposed in this embodiment mainly includes the following steps:

[0067] (1) Clarify the concept of multiple sets of body activation, and collect and organize the well history, production dynamic data, drilling and logging data of the target well, etc.;

[0068] (2) Establish a comprehensive production model for target well fractured solution reservoirs under multiple body dynamics;

[0069] (3) Based on the actual dynamic production data of the target well, fit the parameters of the comprehensive production model, and then invert the dynamic reserves of the target well according to the parameters.

[0070] The calculation steps described above are explained in detail below:

[0071] Step (1): Clarify the concept of multiple body movements

[0072] Fault-knot reservoirs are one of the main oil and gas reservoir types in western China. To ensure the efficiency of oilfield development, the principle in oilfield development design and planning is to minimize the number of wells and connect as many karst caves as possible. For example... Figure 1 As shown, the connectivity between multiple karst caverns should be maintained as much as possible to ensure that crude oil from different caverns can flow smoothly to the bottom of the well. Based on this, a single-system and multiple-system configurations for the target well are constructed, wherein:

[0073] A set of karst cave systems, which are directly connected to the wellbore, can also be called the near-well karst cave area.

[0074] Multiple systems, relying on fissures, connect to a single system in a cave system, which can also be called a remote well cave area.

[0075] Step (2): Construct a comprehensive output model

[0076] When constructing a comprehensive production model, the actual model first needs to be simplified. For example, in a fractured solution reservoir, multiple systems are used, similar to supplying fluid to the wellbore from different areas at the bottom of the well. Figure 2 As shown, the fluid supply of a single-system operation in the target well is approximated as the fluid supply from the near-wellbore area at the bottom of the well to the wellbore, while the fluid supply of multiple-system operations in the target well is approximated as the fluid supply from the far-wellbore area at the bottom of the well to the wellbore. Then, near-wellbore production models related to near-wellbore fluid supply and far-wellbore production models related to far-wellbore fluid supply are established. According to the principle of mass balance:

[0077] Q = J1(p1-p wf )+J2(p2-p1) (1)

[0078]

[0079] In the formula: J i (i = 1, 2) represents the oil production index for the near-wellbore and far-wellbore regions, B j (j=1,2) represents the volume coefficients for the near-wellbore and far-wellbore regions, where subscript 1 represents the near-wellbore region and 2 represents the far-wellbore region. B i ,c t These are the original volume factor and the overall compressibility factor, respectively. N pi (i = 1, 2) represents the cumulative oil production in the near-wellbore and far-wellbore areas; p i (i = 1, 2) represents the pressure in the near-well and far-well regions.

[0080] Next, the near-wellbore production model and the far-wellbore production model are differentiated and integrated to establish the comprehensive production model. The specific process is as follows.

[0081] Differentiate equation (2) with respect to t, and use the relation

[0082]

[0083] Q i (i = 1, 2) represents the crude oil production in the near-well and far-well areas, and t represents the production time.

[0084] Substituting into equation (1) and then integrating, we can obtain the comprehensive output model:

[0085]

[0086] D i (i = 1, 2) represents the crude oil decline rate in the near-well and far-well zones; A i (i = 1, 2) are the fitting coefficients for the near-well and far-well regions.

[0087] In the formula:

[0088]

[0089] N i (i = 1, 2) represent the reserves in the near-well and far-well areas, respectively.

[0090] Therefore, the total reserves (i.e., reservoir reserves) of a fractured-dissolved reservoir utilizing multiple bodies are:

[0091] N = N1 + N2 (6)

[0092] Step (3): Calculate reserves

[0093] Equation (4) is a sum of two exponential functions, making it difficult to directly derive reserves through curve fitting. To facilitate the calculation of reservoir reserves using dynamic production data, this embodiment divides the near-wellbore and far-wellbore areas of the target well based on the pressure propagation distance condition, thus representing equation (4) as two equivalent cases:

[0094] Before the pressure propagates to the second body (i.e., the near-well zone), equation (4) simplifies to:

[0095]

[0096] After the pressure propagates to the second set of bodies (i.e., the far-well zone), equation (4) simplifies to:

[0097]

[0098] K and M are intermediate parameters for the near-wellbore and far-wellbore regions, respectively.

[0099] Let the pressure at the leading edge of the two-body boundary be p. * For ease of calculation, it can be set as p*=p b (p b (where p1 is the saturation pressure), p1 and p2 can be derived from equation (4).

[0100]

[0101] Of course, the inverse p1 and p2 should meet the condition that the pressure P1 of a system is greater than the saturation pressure p. b Furthermore, the pressure P2 of the two sets of bodies is less than the saturation pressure p. b .

[0102] Therefore, the above problem of calculating oil reservoir reserves can be transformed into a mathematical linear solution problem, namely:

[0103]

[0104] When solving equation (10), the parameters A1, A2, D1, and D2 in equation (10) can be determined by fitting the dynamic production data of the target well. Then, these parameters can be substituted into equations (5) and (6) to inversely calculate the reservoir reserves N. Figure 3 As shown, the inversion process mainly includes the following steps:

[0105] S310, Based on the early dynamic production data of the target well, the relevant parameters of the near-wellbore production model are determined by curve fitting;

[0106] S320, based on the late-stage dynamic production data of the target well, the relevant parameters of the far-well production model are determined by curve fitting;

[0107] S330, based on the relevant parameters of the near-wellbore production model and the relevant parameters of the far-wellbore production model, invert the near-wellbore fluid supply and the far-wellbore fluid supply;

[0108] S340 determines the dynamic reserves of the target well based on the fluid supply in the near-wellbore area and the fluid supply in the far-wellbore area.

[0109] It should be noted that the above calculations involve bottomhole flowing pressure. If flowing pressure data is insufficient or unavailable, the bottomhole flowing pressure can be indirectly derived from the wellhead oil pressure. In practice, to minimize the impact of wellbore friction, production operating conditions, etc., data corresponding to a stable production phase of the oil well under the same operating conditions should be selected to calculate the bottomhole flowing pressure P. wf The simple calculation formula is:

[0110] p wf =p h +ρgh (11)

[0111] In the formula: p h ρ is the wellhead oil pressure, h is the wellbore fluid density, g is the height from the wellhead to the bottom of the well, and g is the acceleration due to gravity.

[0112] Based on data from a specific well, the following calculations are performed using the method described above to determine the reserves of a fractured solution reservoir utilizing multiple bodies. The results are then used to verify the effectiveness of the method. The specific steps are as follows:

[0113] (1) First, the production dynamic data of the target appraisal well were collected, as shown in Tables 3 and 4. Well M was put into production on May 13, 2016, and as of May 22, 2021, the cumulative oil production was 16.72 × 10⁻⁶. 4tons. The well's production curve, as shown... Figure 4 As shown.

[0114] Table 3. Partial Production Dynamics Data of Well M

[0115]

[0116]

[0117]

[0118] Table 4 PVT physical property parameters of well M

[0119]

[0120] (2) According to Figure 3 The process in the middle, using curve fitting sequentially, such as Figure 5 , 6 As shown, we obtain A1, A2, D1, D2:

[0121]

[0122] Then, based on Table 4 and Equation (5), J1, J2, N1, and N2 are calculated:

[0123]

[0124] Ultimately, the total reserves of Well M were 202.08 × 10⁻⁶. 4 ton.

[0125] (3) Substitute the parameters obtained in step (2) into equation (4), plot the graph, and compare it with the actual production data of the mine, such as... Figure 7 As shown. By Figure 7 It can be seen that the calculation method provided in this embodiment has high accuracy, which indirectly shows that the parameter values ​​in step (2) are relatively scientific and in line with the actual situation of the mine.

[0126] Example 2

[0127] The following are embodiments of the apparatus of the present invention, which can be used to execute embodiments of the method of the present invention. For details not disclosed in the embodiments of the apparatus of the present invention, please refer to the embodiments of the method of the present invention.

[0128] This embodiment provides an apparatus for calculating the reserves of fractured solution reservoirs, characterized in that it includes:

[0129] The system construction module is used to construct a single-body system and multiple-body systems for the target well. The single-body system includes a cave system directly connected to the wellbore of the target well, and the multiple-body systems include a cave system connected to the single-body system through fractures.

[0130] The model building module is used to establish a comprehensive production model of the target well using multiple systems based on the principle of material balance. The comprehensive production of the target well using multiple systems is related to the fluid supply of the target well's single-system system and the fluid supply of the multi-system system.

[0131] The fitting calculation module is used to determine the parameters of the comprehensive production model of the target well using multiple bodies by fitting the dynamic production data of the target well, and then invert the dynamic reserves of the target well based on the parameters.

[0132] Example 3

[0133] This embodiment provides a computer-readable medium having a computer program stored thereon. When executed by a processor, the program implements the steps of a method for calculating the reserves of a fractured solution reservoir as described in the above embodiment.

[0134] It should be noted that all or part of the processes in the methods of the above embodiments of the present invention can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. Of course, there are other readable storage media, such as quantum memories, graphene memories, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0135] Example 4

[0136] Figure 8 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Figure 8As shown, at the hardware level, this electronic device includes a processor, and optionally also includes an internal bus, a network interface, and memory. The memory may include main memory, such as high-speed random-access memory (RAM), or it may include non-volatile memory, such as at least one disk drive. Of course, this electronic device may also include other hardware required for other business operations.

[0137] The processor, network interface, and memory can be interconnected via an internal bus, which can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. This bus can be categorized as an address bus, data bus, control bus, etc. For ease of illustration, only line segments are used in the diagram, but this does not imply that there is only one bus or one type of bus.

[0138] A memory is used to store programs. Specifically, the program may include program code, which includes computer operation instructions. The memory may include main memory and non-volatile memory, and provides instructions and data to the processor. The processor reads the corresponding computer program from the non-volatile memory into main memory and then runs it. The processor executes the program stored in the memory to perform all the steps in the aforementioned method for calculating the reserves of a fractured solution reservoir.

[0139] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus. The communication interface is used for communication between the above electronic devices and other devices.

[0140] A bus, including hardware, software, or both, is used to couple the aforementioned components together. For example, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, a bus may include one or more buses. Although specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0141] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0142] The memory may include a large-capacity storage device for data or instructions. For example, and not limitingly, the memory may include a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where suitable, the memory may include removable or non-removable (or fixed) media. In a particular embodiment, the memory is a non-volatile solid-state memory. In a particular embodiment, the memory includes a read-only memory (ROM). Where suitable, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0143] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0144] It should be noted that those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this invention. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0145] The apparatus, device, system, module, or unit described in the above embodiments can be implemented by a computer chip or entity, or by a product with a certain function. A typical implementation device is a computer. Specifically, the computer can be, for example, a personal computer, a laptop computer, an in-vehicle human-machine interaction device, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or any combination of these devices.

[0146] While this invention provides the method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-inventive means. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only execution order. In actual devices or terminal products, the methods shown in the embodiments or drawings can be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment, or even a distributed data processing environment).

[0147] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0148] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0149] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0150] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0151] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, electronic devices, and readable storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0152] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A method for calculating the reserves of a fractured solution reservoir, characterized in that, include: S100, construct a set of systems and multiple sets of systems for the target well, wherein the set of systems includes a cave system directly connected to the wellbore of the target well, and the multiple sets of systems include a cave system connected to the set of systems through fractures; S200, Based on the principle of material balance, establish a comprehensive production model for the target well using multiple systems, wherein the comprehensive production of the target well using multiple systems is related to the fluid supply of one system and the fluid supply of multiple systems of the target well. S300: Based on the dynamic production data of the target well, the parameters of the comprehensive production model of the target well using multiple bodies are determined by fitting, and then the dynamic reserves of the target well are inverted based on the parameters.

2. The method for calculating the reserves of a fractured solution reservoir as described in claim 1, characterized in that, In step S200, a comprehensive production model for the target well using multiple systems is established based on the principle of material balance, including the following steps: S210, the fluid supply of a single system in the target well is approximated as the fluid supply from the near-wellbore area at the bottom of the target well to the wellbore; the fluid supply of multiple systems in the target well is approximated as the fluid supply from the far-wellbore area at the bottom of the target well to the wellbore. S220, based on the principle of material balance, establish a near-wellbore production model related to fluid supply from the near-wellbore area to the wellbore and a far-wellbore production model related to fluid supply from the far-wellbore area to the wellbore. S230, Differentiate and integrate the near-wellbore production model and the far-wellbore production model to establish the integrated production model.

3. The method for calculating the reserves of a fractured solution reservoir as described in claim 2, characterized in that, The near-wellbore zone and far-wellbore zone at the bottom of the target well are divided according to the pressure propagation distance.

4. The method for calculating the reserves of a fractured solution reservoir as described in claim 3, characterized in that, The pressure propagation distance conditions include pressure in the near-wellbore area being greater than saturation pressure, and pressure in the far-wellbore area being less than saturation pressure.

5. The method for calculating the reserves of a fractured solution reservoir as described in claim 3, characterized in that, The pressure is determined based on the bottom hole flowing pressure, which in turn is determined based on the wellhead oil pressure.

6. The method for calculating the reserves of a fractured solution reservoir as described in claim 4, characterized in that, In step S300, based on the dynamic production data of the target well, the parameters of the comprehensive production model of the target well using multiple bodies are determined by fitting, and then the dynamic reserves of the target well are inverted based on the parameters, including the following steps: S310, Based on the early dynamic production data of the target well, the relevant parameters of the near-wellbore production model are determined by curve fitting; S320, based on the late-stage dynamic production data of the target well, the relevant parameters of the far-well production model are determined by curve fitting; S330, based on the relevant parameters of the near-wellbore production model and the relevant parameters of the far-wellbore production model, invert the near-wellbore fluid supply and the far-wellbore fluid supply; S340 determines the dynamic reserves of the target well based on the fluid supply in the near-wellbore area and the fluid supply in the far-wellbore area.

7. The method for calculating the reserves of a fractured solution reservoir as described in claim 6, characterized in that, After step S320 and before step S330, the following steps are also included: S325, based on the relevant parameters of the near-wellbore production model and the far-wellbore production model, calculate the pressure in the near-wellbore area and the pressure in the far-wellbore area, and verify whether the pressure in the near-wellbore area and the pressure in the far-wellbore area meet the pressure propagation distance condition. If not, return to step S310 to refit until the pressure in the near-wellbore area and the pressure in the far-wellbore area meet the pressure propagation distance condition.

8. An apparatus for calculating the reserves of a fractured solution reservoir, characterized in that, include: The system construction module is used to construct a single-body system and multiple-body systems for the target well. The single-body system includes a cave system directly connected to the wellbore of the target well, and the multiple-body systems include a cave system connected to the single-body system through fractures. The model building module is used to establish a comprehensive production model of the target well using multiple systems based on the principle of material balance. The comprehensive production of the target well using multiple systems is related to the fluid supply of the target well's single-system system and the fluid supply of the multi-system system. The fitting calculation module is used to determine the parameters of the comprehensive production model of the target well using multiple bodies by fitting the dynamic production data of the target well, and then invert the dynamic reserves of the target well based on the parameters.

9. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements a method for calculating the reserves of a broken-solution reservoir as described in any one of claims 1 to 7.

10. An electronic device comprising: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement a method for calculating the reserves of a fractured solution reservoir as described in any one of claims 1 to 7.

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