Simulation Method, Device, Equipment and Medium for SAGD Development of Oil Sand Reservoirs

Abstract

An embodiment of the present invention discloses a simulation method, device, equipment and medium for SAGD development of oil sand reservoirs. The simulation method for SAGD development of oil sand reservoirs includes: constructing a branched well model according to preset branched well parameters; wherein the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent wellbore diameter of the branched wellbore, and the branched wellbore angle; constructing an oil sand reservoir physical model including the branched well model; based on the SAGD technology, injecting steam into the oil sand reservoir physical model to establish thermal connectivity between the steam injection pipeline and the production pipeline in the branched well model; accessing the steam injection pipeline after the thermal connectivity reaches the steam injection parameters, simulating the heavy oil production process, and maintaining the monitoring of the simulated production parameters. The embodiment of the present invention realizes the accurate simulation of the steam chamber development law and the degree of utilization of marginal reserves in the SAGD development of oil sand reservoirs with branched wells, thereby improving the heavy oil development efficiency on site.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of heavy oil exploitation, and particularly to a simulation method, device, equipment and medium for SAGD development of oil sand reservoirs. Background Art

[0002] SAGD (Steam Assisted Gravity Drainage) is an efficient development method for extra-heavy oil and oil sand resources. In the SAGD technology, two horizontal wells are arranged in a heavy oil reservoir, with the upper horizontal well being the steam injection well and the lower horizontal well being the production well. By injecting high-temperature steam into the steam injection well and the production well, steam circulation is carried out to heat the reservoir and form a steam chamber. When an effective oil drainage channel is established between the steam injection well and the production well and the production conversion requirement is met, the steam injection well still continuously injects steam, while the production well stops injecting steam and enters the oil production stage.

[0003] With the continuous development of oil sand resources, the regularity of the planar distribution characteristics of reservoirs in the proven oil sand resources is poor. If conventional dual-horizontal well SAGD development is adopted, it is difficult to effectively utilize the edge reserves. Therefore, considering cost savings, it is proposed to use branched wells as the well type for the SAGD method, including two forms: dual-branched wells and single-branched wells, which can effectively utilize the edge reserves.

[0004] This branched well SAGD technology has currently been implemented in the oil sand reservoirs in Alberta, Canada, with remarkable results. However, there is currently no effective simulation method to study the steam chamber development law and the degree of utilization of edge reserves in branched well SAGD development. Summary of the Invention

[0005] The embodiments of the present invention provide a simulation method, device, equipment and medium for SAGD development of oil sand reservoirs to accurately simulate the steam chamber development law and the degree of utilization of edge reserves in branched well SAGD development of oil sand reservoirs, so as to better implement it on site and improve the heavy oil development efficiency.

[0006] In a first aspect, the embodiments of the present invention provide a simulation method for SAGD development of oil sand reservoirs, including:

[0007] Constructing a branched well model according to preset branched well parameters; wherein, the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent well diameter of the branched wellbore, and the branched wellbore angle;

[0008] Constructing an oil sand reservoir physical model including the branched well model;

[0009] Based on the SAGD technology, steam is injected into the physical model of the oil sand reservoir to establish the thermal connection between the steam injection pipeline and the production pipeline in the branched well model;

[0010] After the thermal connection reaches the steam injection parameters, the steam injection pipeline is connected, the heavy oil production process is simulated, and the monitoring of the simulated production parameters is maintained.

[0011] In a second aspect, an embodiment of the present invention further provides a simulation device for SAGD development of an oil sand reservoir, including:

[0012] A branched well model construction module for constructing a branched well model according to preset branched well parameters; wherein, the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent wellbore diameter of the branched wellbore, and the branched wellbore angle;

[0013] An oil sand reservoir model construction module for constructing a physical model of an oil sand reservoir including the branched well model;

[0014] A thermal connection establishment module for injecting steam into the physical model of the oil sand reservoir based on the SAGD technology to establish the thermal connection between the steam injection pipeline and the production pipeline in the branched well model;

[0015] A heavy oil production simulation module for connecting the steam injection pipeline after the thermal connection reaches the steam injection parameters, simulating the heavy oil production process, and maintaining the monitoring of the simulated production parameters.

[0016] In a third aspect, an embodiment of the present invention further provides an electronic device, including:

[0017] One or more processors;

[0018] A storage device for storing one or more programs,

[0019] When the one or more programs are executed by the one or more processors, the one or more processors implement the simulation method for SAGD development of an oil sand reservoir as described in any embodiment of the present invention.

[0020] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the simulation method for SAGD development of an oil sand reservoir as described in any embodiment of the present invention.

[0021] Based on the constructed branched well model and oil sand reservoir physical model, the embodiments of the present invention use the SAGD technology to simulate the heavy oil production process and monitor the simulated production parameters during the production process. To achieve real-time monitoring and control of the steam chamber development law and the degree of utilization of the edge reserves in the oil sand reservoir developed by the branched well SAGD, so as to better implement it on site and improve the heavy oil development efficiency. And during the simulated production process, the development characteristics of steam thermal recovery of the branched well are fully considered in the model parameter design, improving the accuracy of the model simulation. Description of the Drawings

[0022] Figure 1 is the flow chart of the simulation method for the SAGD development of the oil sand reservoir in Embodiment 1 of the present invention;

[0023] Figure 2 is the flow chart of the simulation method for the SAGD development of the oil sand reservoir in Embodiment 2 of the present invention;

[0024] Figure 3 is the similarity design schematic diagram of the field prototype and model parameters;

[0025] Figure 4 is the structural schematic diagram of the conversion joint between the branched wellbore and the main wellbore;

[0026] Figure 5 is the actual structural diagram of the branched well model;

[0027] Figure 6 is the side view of the oil sand reservoir physical model;

[0028] Figure 7 is the top view of the oil sand reservoir physical model;

[0029] Figure 8 is the comparison result diagram of the fitting result after parameter adjustment of the numerical simulation model and the oil production rate of the oil sand reservoir physical model;

[0030] Figure 9 is the schematic diagram of the numerical simulation model obtained by experimental numerical inversion;

[0031] Figure 10 is the structural schematic diagram of the simulation device for the SAGD development of the oil sand reservoir in Embodiment 3 of the present invention;

[0032] Figure 11 is the structural schematic diagram of the electronic device in Embodiment 4 of the present invention. Detailed Embodiments

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0034] Embodiment 1

[0035] Figure 1 is a flowchart of a simulation method for SAGD development of oil sand reservoirs in Embodiment 1 of the present invention. This embodiment is applicable to simulating the situation of SAGD development of oil sand reservoirs with branched wells, so as to visually observe the different effects of branched wells on injection wells and production wells, as well as the steam cavity superposition mode between branched wells and the main wellbore, which is convenient for implementing the branched well development mode at the development site. This method can be executed by a simulation device for SAGD development of oil sand reservoirs. The device can be implemented in software and / or hardware and can be configured in an electronic device. For example, the electronic device can be a background server or other devices with communication and computing capabilities. As Figure 1 shown, the method specifically includes:

[0036] Step 101, construct a branched well model according to preset branched well parameters; wherein, the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent wellbore diameter of the branched wellbore, and the branched wellbore angle.

[0037] Among them, the preset branched well parameters are set according to the similarity principle based on the on-site prototype. Exemplarily, the similarity of the branched well model is based on 1 / 4 of the on-site prototype, and the relevant parameters are designed proportionally.

[0038] Exemplarily, for the construction of the branched well model, based on the experimental parameters obtained from the similarity design with the on-site prototype, the length of the main wellbore is set to 30 cm, the length of a single branched wellbore is set to 15 cm, and there are holes with a certain distance and size on both the main wellbore and the branched wellbore to simulate the perforation points. Then, the main wellbore and the branched wellbore are connected by a swivel joint at a certain angle to achieve the precise simulation of the branched well. The angle of the swivel joint used in the experiment is 45 degrees, that is, the branched wellbore angle is 45 degrees, and the joint can rotate, so this model is also applicable to spatial three-dimensional branches. Since there are differences in the injection and production effects between the branched wellbore and the main wellbore, the injection and production effects are adjusted according to the equivalent wellbore diameter. For the branched well model, the equivalent wellbore diameter is the projection distance of the line connecting the middle positions on both sides of the branched wellbore in the wellbore diameter direction, which is equivalent to the well spacing of the branched well model. When the length or angle of the branch changes, its equivalent wellbore diameter changes, which will also have a certain impact on the injection conditions.

[0039] Therefore, different branch well models can be determined by simulating the preset branch well parameters to ensure that the branch well model can accurately simulate the on-site prototype.

[0040] In a feasible embodiment, a branch well model is constructed according to the preset branch well parameters, including:

[0041] Compression springs are wound around the branch wellbore and the main wellbore to prevent the wellbore from being blocked.

[0042] Since the injection and production wells of the branch well model are all perforated wells, there are holes for simulating perforation points with a certain distance and size on both the main wellbore and the branch wellbore in the model. To prevent sand from entering the wellbore and causing blockage, compression springs are wound around the main wellbore and the branch wellbore. At the same time, the spacing of the compression springs can be appropriately adjusted according to the hole settings along the wellbore to ensure the anti-blockage effect.

[0043] Step 102: Construct a physical model of an oil sand reservoir including a branch well model.

[0044] Simulate the on-site development conditions of the oil sand reservoir and set the branch well model in the simulated oil reservoir environment.

[0045] In a feasible embodiment, step 102 includes:

[0046] Adopt a high-temperature and high-pressure three-dimensional adiabatic physical model, and sequentially establish simulation layers of the bottom layer of the oil reservoir, the oil sand reservoir, and the caprock from bottom to top;

[0047] During the filling process of the oil sand in the oil sand reservoir, at least one temperature sensor and one pressure sensor are buried, and connections are established between the sensors and the data acquisition device to monitor the real-time changes of the oil reservoir temperature and pressure during the SAGD production process; among them, the oil sand is simulated by quartz sand saturated with heavy oil, and the edge of the model is simulated by heat-insulating materials;

[0048] After the oil sand is filled, the upper cover of the pressure-bearing container is covered for encapsulation, the pipeline connection outside the model is carried out, and heating tapes are wound around the pipelines to prevent steam condensation and pipeline blockage; among them, the pipelines include a preheating pipeline, a steam injection pipeline, and a production pipeline;

[0049] Inject nitrogen into the model to adjust and balance the internal pressure of the model, and use a constant temperature box to adjust and balance the internal temperature of the model so that the oil reservoir pressure and temperature reach the preset parameters.

[0050] Exemplarily, during the oil sand filling process, an appropriate amount of temperature sensors and pressure sensors are buried in the oil sand reservoir. For example, at least 2 layers with no less than 20 temperature sensors and 1 pressure sensor are buried to detect the real-time changes in temperature and pressure during the SAGD production process; the oil sand reservoir is simulated by quartz sand saturated with heavy oil, the bottom layer and the cap layer are simulated by similar materials, and the sides are simulated by heat insulation materials.

[0051] Step 103: Based on the SAGD technology, inject steam into the physical model of the oil sand reservoir to establish thermal communication between the steam injection pipeline and the production pipeline in the branched well model.

[0052] The SAGD technology effectively utilizes the overriding performance of steam and uses the gravity of condensate as the main driving force to develop heavy oil. Therefore, after the physical model of the oil sand reservoir is constructed, steam is injected into the model to simulate the on-site development conditions.

[0053] In a feasible embodiment, the method further includes: winding a preheating pipeline around the steam injection pipeline and the production pipeline in the branched well model;

[0054] Correspondingly, step 103 includes:

[0055] Preheat the preheating pipeline and monitor the temperatures of the steam injection pipeline and the production pipeline in the branched well model;

[0056] If the temperature reaches the preheating temperature, then inject steam at a preset steam injection rate based on the SAGD technology to make the temperature reach the steam injection temperature.

[0057] The steam injection pipeline and the production pipeline in the model are used to simulate the steam injection well and the production well in the SAGD technology, and a preheating pipeline with an outer diameter of 2 mm is wound around the steam injection well and the production well in the model to simulate the cyclic preheating process. And before formally simulating the heavy oil production process, preheat the steam injection pipeline and the production pipeline through the preheating pipeline to enable them to quickly reach the preheating temperature and improve the production efficiency.

[0058] Exemplarily, for the preheating process before production, according to the steam injection rate determined by the similarity criterion, establish thermal communication between the steam injection pipeline and the production pipeline through the preheating pipeline, and monitor the change of temperature in real time. After reaching the preset temperature, the preheating process ends. After the preheating ends, carry out the production process based on the SAGD technology. Before injecting steam into the physical model of the oil sand reservoir, debug the steam generator so that the steam injection rate, steam injection temperature and pressure can meet the similarity requirements of the on-site prototype.

[0059] Step 104: After the thermal communication reaches the steam injection parameters, connect the steam injection pipeline, simulate the heavy oil production process, and continuously monitor the simulated production parameters.

[0060] After the steam injection parameters for injecting steam into the model through the steam generator are stabilized, the steam injection well is connected, and the heavy oil production process begins. Optionally, a confining pressure device is provided at the outlet of the simulated production well, and opening, closing, and production are achieved by adjusting the valve. During the simulated production process, the computer monitors the temperature and pressure at the model body, the outlet of the steam generator, the constant temperature box, etc. in real time. Through the measurement and control software, the change of the temperature field inside the model can be observed on the computer screen. The production system collects the produced fluid in time intervals, measures the total amount of oil and water in real time during the simulation experiment. After the simulation experiment ends, the collected produced fluid is specially treated and separated to measure the instantaneous production of oil and water, and the experiment ends until the instantaneous gasoline ratio is relatively high.

[0061] Based on the constructed branched well model and oil sand reservoir physical model, the embodiment of the present invention uses the SAGD technology to simulate the heavy oil production process and monitors the simulated production parameters during the generation process. To achieve real-time monitoring and control of the steam chamber development law and the degree of utilization of the edge reserves in the oil sand reservoir developed by the branched well SAGD, so as to better implement on-site and improve the heavy oil development efficiency. And during the simulated production process, the development characteristics of steam thermal recovery of branched wells are fully considered in the design of model parameters, which improves the accuracy of model simulation.

[0062] Embodiment 2

[0063] Figure 2 It is a flowchart of the simulation method for SAGD development of an oil sand reservoir in Embodiment 2 of the present invention. Embodiment 2 is further optimized on the basis of Embodiment 1. As Figure 2 shown, the method includes:

[0064] Step 201: Set parameters associated with the oil sand reservoir physical model from at least one dimension; wherein, the dimension includes: geometric similarity dimension, kinematic similarity dimension, and thermodynamic similarity dimension.

[0065] Among them, the parameters include model basic parameters and production operation parameters; the model basic parameters include at least one of the following: the distance between the production pipeline and the bottom of the oil layer, the distance between the branched wellbores, the length of the main wellbore, the length of a single branched wellbore, the angle of the branched wellbore, the row spacing, the thickness of the oil layer, porosity, permeability, formation temperature, crude oil viscosity, and original formation pressure; the production operation parameters include at least one of the following: preheating temperature, steam injection temperature, steam dryness, preset steam injection rate, operating pressure, and production time.

[0066] The design of the model is based on the principle of similarity with the on-site prototype. For example, it is scaled down according to the parameter requirements of the on-site prototype, so that the established model can provide a solid theoretical support for subsequent experimental results.

[0067] Step 202: Construct a branched well model according to preset branched well parameters; wherein, the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent well diameter of the branched wellbore, and the branched wellbore angle.

[0068] Step 203: Construct an oil sand reservoir physical model including the branched well model.

[0069] Step 204: Based on the SAGD technology, inject steam into the oil sand reservoir physical model to establish thermal communication between the steam injection pipeline and the production pipeline in the branched well model.

[0070] Step 205: After the thermal communication reaches the steam injection parameters, connect the steam injection pipeline, simulate the heavy oil production process, and maintain the monitoring of the simulated production parameters.

[0071] Step 206: End the simulated heavy oil production process when the instantaneous gasoline production in the simulated production parameters is monitored to reach the peak.

[0072] During the simulated production process, by monitoring the instantaneous gasoline production, determine to end the experiment when it reaches the peak. Optionally, a confining pressure device is provided at the outlet of the simulated production well, and opening, closing, production, etc. are realized by adjusting the valve. During the simulated production process, the computer monitors the temperature and pressure at the model body, the outlet of the steam generator, the constant temperature box, etc. in real time. Through the measurement and control software, the change of the internal temperature field of the model can be observed on the computer screen. The production system collects the produced fluid in time intervals, measures the total amount of oil and water in real time during the simulation experiment. After the simulation experiment ends, the collected produced fluid is specially treated and separated to measure the instantaneous production of oil and water, and end the experiment until the instantaneous gasoline is relatively high.

[0073] Step 207: Establish a numerical simulation model for SAGD development of the branched well according to the branched well parameters and the monitored simulated production parameters to numerically simulate the heavy oil production process of the oil sand reservoir physical model.

[0074] Use the experimental data obtained from the oil sand reservoir physical model experiment to establish a theoretical numerical simulation model, so as to realize the numerical simulation experiment of SAGD development of the oil sand reservoir through the numerical simulation model, and avoid the waste of resources caused by the need for physical simulation experiments.

[0075] Specifically, based on the parameters determined according to the similarity principle, the experimental effect achieved by the established numerical simulation model is close to the simulation experimental effect of the oil sand reservoir physical model, so that the numerical simulation model can approximately simulate the on-site development effect. By constructing the oil sand reservoir physical model as an intermediate step, the accuracy of establishing the numerical simulation model is improved, and it is avoided that the establishment of the numerical simulation model is only based on theory without actual experimental data support.

[0076] In a feasible embodiment, step 207 includes:

[0077] By adjusting the conductivity, relative permeability curve, and endpoint parameters of the relative permeability curve, the result of fitting the production data is obtained; wherein, the result of fitting the production data includes at least one of the following: experimental reserves, cumulative steam injection, cumulative oil production, gas-oil ratio, and oil production rate;

[0078] If the error between the result of fitting the data and the monitored simulated production parameters is less than the preset error, the numerical simulation model associated with the result of fitting the data is the laboratory-scale model of the heavy oil production process of the oil sand reservoir physical model.

[0079] Using reservoir numerical simulation software, based on the model parameters and simulated production parameters obtained above, a laboratory-scale numerical simulation model is established to conduct numerical simulation of SAGD for horizontal wells. Specifically, by adjusting parameters such as conductivity, relative permeability curve, and endpoint of the relative permeability curve in the numerical simulation model, the results of reserves, cumulative steam injection, cumulative oil production, gas-oil ratio, oil production rate, etc. of the SAGD development experiment are successively fitted. When the fitting error is less than the error requirement (for example, set to 5%), it can be considered that the numerical simulation model is the SAGD laboratory-scale model obtained by inversion and can represent the real simulation experiment results, which can be used as the basis for subsequent numerical experiment expansion.

[0080] Step 208: By adjusting the horizontal well parameters in the numerical simulation model, the SAGD development results of different horizontal well models are obtained.

[0081] Using the numerically simulated model obtained by the above inversion, by adjusting the relevant parameter settings inside the numerical simulation model, it can be used to analyze the influence of reservoir, fluid physical properties, and operation parameters on SAGD development. At the same time, modify the relevant parameters of the horizontal well in the model, including the length of the main / branch wellbore, the number of branch wellbores, the angle between the main wellbore and the branch wellbore, etc., to facilitate the influence of the horizontal well on the SAGD steam chamber expansion and development dynamics. Through the establishment of the numerical simulation model, it is avoided that the parameters in the oil sand reservoir physical model need to be repeatedly modified, resulting in a complex experimental process. For example, when the number of branch wellbores needs to be modified, without the numerically simulated model obtained by inversion, it is necessary to reconstruct the horizontal well model in the oil sand reservoir physical model, and the resources consumed by the simulation process are relatively large. By establishing the numerical simulation model, only the required parameters need to be numerically simulated. After determining the simulation effect, the oil sand reservoir physical model is reconstructed and simulated, which can improve the efficiency of SAGD development of the oil sand reservoir by horizontal wells.

[0082] The embodiments of the present invention fully consider the development characteristics of steam thermal recovery in branched wells for model parameter design, and realize the real-time monitoring and control of the development of the SAGD steam chamber. Through the experimental-scale numerical simulation model obtained by inversion, the disadvantage that large-scale three-dimensional physical simulation experiments are difficult to repeat multiple times is effectively solved.

[0083] The present invention also provides a preferred implementation manner: The specific implementation process is as follows:

[0084] The first step is the design of similar model parameters.

[0085] The design principles are geometric similarity, kinematic similarity, and thermodynamic similarity. Reasonable model parameter design can provide a solid theoretical support for subsequent experiments.

[0086] The specific parameters include: basic parameters such as the distance between the production well and the bottom of the oil layer, the distance between branched wells, the length of the main wellbore, the length of the branched wellbore, the angle of the branched wellbore, the row spacing, the thickness of the oil layer, porosity, permeability, formation temperature, crude oil viscosity, original formation pressure, etc., and operation parameters such as preheating temperature, steam injection temperature, steam quality, steam injection rate, operating pressure, and production time. As Figure 3 shown is the schematic diagram of the similarity design of the field prototype and model parameters. The field prototype is 400m, and the similarity design of the experiment is based on 1 / 4 of the field prototype. There are a total of 19 parameters, and 17 parameters can be satisfied under the physical simulation experiment conditions, with a similarity degree of 89.5%, which has practical significance.

[0087] The second step is the construction of the branched well model and the physical model of the oil sand reservoir.

[0088] For the construction of the branched well model, according to the model parameters obtained from the similarity design, the length of the main wellbore is 30cm, and the length of a single branched wellbore is 15cm. There are holes with a certain distance and size on both the main wellbore and the branched wellbore for simulating the perforation points. Then, a conversion joint at a certain angle is used to connect the main wellbore and the branched wellbore to achieve an accurate simulation of the branched well. The angle of the conversion joint used in the simulation experiment is 45 degrees. The schematic diagram of the conversion joint structure between the branched wellbore and the main wellbore is as Figure 4 shown, and the actual structure diagram of the branched well model is as Figure 5 shown.

[0089] For the construction of the physical model of the oil sand reservoir, a high-temperature and high-pressure three-dimensional adiabatic physical model is adopted. The simulation layers of the bottom of the oil layer, the oil sand reservoir, and the caprock are established from bottom to top in sequence. In the oil sand reservoir, the similarity parameters in the first step above are adopted to construct the oil sand reservoir model to achieve an accurate simulation of SAGD.

[0090] As Figure 6 shown is the side view of the physical model of the oil sand reservoir, and as Figure 7 shown is the top view of the physical model of the oil sand reservoir.Figure 6 and Figure 7 The explanations of the reference numerals in the drawings are as follows: simulation bottom layer 1, heat insulation board 2, temperature sensor 3, simulation cover layer 4, simulation oil sand reservoir 5, metal shell 6, steam injection pipeline 7, production pipeline 8, compression spring 9, preheating pipeline 10, wooden board and clay 11.

[0091] The steam injection pipeline 7 and the production pipeline 8 are used to simulate the steam injection well and the production well in the SAGD technology, and pipelines with an outer diameter of 2 mm are wound around the steam injection pipeline and the production pipeline to simulate the cyclic preheating process; during the oil sand filling process, an appropriate amount of temperature sensors and pressure sensors are buried in the oil sand reservoir to detect the real-time changes of temperature and pressure during the SAGD exploitation process; the oil sand reservoir is simulated by quartz sand saturated with heavy oil, the bottom layer and the cover layer are simulated by similar materials, which are similar to the thermodynamic properties of the actual reservoir, and the edge is simulated by the heat insulation board 2; after the model is filled, the upper cover of the pressure-bearing container is covered for encapsulation, and the pipeline connections outside the model are carried out, including the preheating pipeline, the steam injection pipeline and the production pipeline, and heating tapes are wound around the pipelines to prevent steam condensation and pipeline blockage; and each sensor is connected to the data acquisition device.

[0092] The geometric dimensions of the physical model of the oil sand reservoir are length × width × height of 100 cm × 30 cm × 20 cm. The bottom of the model has multiple channels for various sensor cables to pass through, and a cyclic preheating system is established through other channels on the side, and the preheating pipeline is wound around the steam injection well and the production well. In order to prevent quartz sand from invading the steam injection pipeline 7 and the production pipeline 8, a spring is wound around the pipeline and fixed. At the same time, in order to prevent steam condensation in the steam injection pipeline and heavy oil blockage in the production pipeline during the production process, heating tapes are wound around the steam injection pipeline and the production pipeline outside the model.

[0093] After the model is filled, cover the top cover of the model, pressurize the model with nitrogen, and stabilize the pressure at 3 MPa for more than 24 h, and use a surfactant to detect whether there is air leakage at each simulated outlet port. After the airtightness test is completed, push it into the constant temperature box, adjust the temperature of the constant temperature box to the simulated oil layer temperature, and let it stand for 48 hours for aging. When the oil layer pressure and temperature reach the experimental design requirements, start the experiment.

[0094] The third step is the SAGD process experiment simulation, including the cyclic preheating process and the heavy oil production process.

[0095] For the cyclic preheating process, according to the steam injection rate determined by the similarity criterion, establish the thermal connection between the steam injection well and the production well through the preheating pipeline, monitor the change of temperature in real time, and end the preheating process after reaching the preheating temperature.

[0096] For the SAGD process, before injecting steam into the model, the steam generator is debugged so that the steam injection rate, steam injection temperature, and pressure can meet the similar parameters. After the steam injection parameters are stable, the injection well is connected, and the heavy oil production process begins. A confining pressure device is installed at the outlet of the simulated production well, and opening, closing, and production of the well are achieved by adjusting the valve. During the simulation experiment process, the computer monitors the temperature and pressure at the model body, the outlet of the steam generator, the constant temperature box, etc. in real time. Through the measurement and control software, the change of the temperature field inside the model can be observed on the computer screen, and the development of the steam chamber can be observed. The production system collects the produced fluid at different time intervals. The total amount of oil and water is measured in real time during the experiment. After the experiment ends, the collected produced fluid is specially treated and separated to measure the instantaneous production rates of oil and water. The experiment ends when the instantaneous gasoline ratio is relatively high. After the physical simulation experiment ends, important parameters are sorted out and calculated, and a curve graph is drawn. For example, the broken line graph of the oil production rate and time of the dual-branch well model, the broken line graph of the water content in gasoline and time, the broken line graph of the instantaneous gasoline ratio and time, and the broken line graph of the recovery degree and time.

[0097] Step 4, numerical inversion of the experimental model.

[0098] Using reservoir numerical simulation software, based on the above model parameters and experimental parameters, a numerical simulation model at the laboratory scale is established for numerical simulation of SAGD in a branch well. By adjusting parameters such as conductivity, relative permeability curve, and endpoints of the relative permeability curve, the results of reserves, cumulative steam injection, cumulative oil production, gasoline ratio, oil production rate, etc. of the SAGD experiment are successively fitted. When the fitting error is less than the error requirement, it can be considered that this numerical simulation model is the SAGD laboratory-scale model obtained by inversion that can represent the real experimental results and can be used as the basis for subsequent numerical experiment expansion. As Figure 8 shown is the comparison result graph of the fitting result after parameter adjustment of the numerical simulation model and the oil production rate of the oil sand reservoir physical model. It can be obtained that the oil production rate of the numerical simulation model is close to that of the physical model, and the simulation results of the numerical simulation model can be considered similar to those of the physical model. Optionally, the closest numerical simulation model can also be determined by comparing the fitting results of water content or cumulative oil production. As Figure 9 shown is the schematic diagram of the numerical simulation model obtained by experimental numerical inversion. From Figure 9 it can be seen that the two horizontal wells are the steam injection well and the production well, as well as the branch wellbores on the steam injection well and the production well.

[0099] Therefore, this numerical simulation model is the SAGD laboratory-scale model obtained by inversion that can represent the real experimental results and can be used as the basis for subsequent numerical experiment expansion. The numerical simulation model of SAGD in a branch well complements the simulation experiment of the oil sand reservoir physical model, which is convenient for analyzing the advantages of the SAGD technology in a branch well, the development of the steam chamber, production effects, influencing factors, etc., and guiding the on-site development of oilfields.

[0100] Step 5, numerical simulation of the SAGD experiment for multilateral wells.

[0101] Using the numerical model obtained from the above inversion, by adjusting the relevant parameter settings inside the model, it can be used to analyze the effects of reservoir, fluid physical properties, and operating parameters on SAGD. At the same time, by changing the relevant parameters of the multilateral wells in this model, including the lengths of the main / branch wells, the number of branch wellbores, the angle between the main wellbore and the branch wellbores, etc., the influence of the multilateral wells on the steam chamber expansion and development dynamics of SAGD can also be accurately characterized.

[0102] Through the physical simulation and numerical simulation of SAGD with dual multilateral wells, it can be obtained that the multilateral wells increase the oil production rate within a certain period of time, accelerate the expansion speed of the steam chamber, and shorten the plateau time, with obvious advantages.

[0103] The beneficial effects of the present invention are as follows: fully considering the development characteristics of steam thermal recovery of multilateral wells for model parameter design, taking appropriate sand control measures according to the heavy oil seepage characteristics of the main and branch wellbores, collecting temperature and pressure data at different times and positions through temperature and pressure sensors at different positions within the reservoir, realizing the real-time monitoring and control of the development of the SAGD steam chamber, and through the experimental-scale numerical model obtained by inversion, effectively solving the drawback that large-scale three-dimensional physical simulation experiments are difficult to repeat multiple times, and can effectively simulate various well patterns for oil sand development such as SAGD with dual multilateral wells, SAGD with multilateral well production - horizontal well injection, and SAGD with horizontal well injection - multilateral well production.

[0104] Embodiment 3

[0105] Figure 10 It is a schematic structural diagram of a simulation device for SAGD development of oil sand reservoirs in Embodiment 3 of the present invention. This embodiment is applicable to simulating the situation of SAGD development of oil sand reservoirs with multilateral wells. As Figure 10 shown, the device includes:

[0106] A multilateral well model construction module 310, configured to construct a multilateral well model according to preset multilateral well parameters; wherein, the multilateral well parameters include at least one of the following: the number of branch wellbores, the length of a single branch wellbore, the length of the main wellbore, the equivalent well diameter of the branch wellbore, and the branch wellbore angle;

[0107] An oil sand reservoir model construction module 320, configured to construct an oil sand reservoir physical model including the multilateral well model;

[0108] A thermal connection establishment module 330, configured to inject steam into the oil sand reservoir physical model based on the SAGD technology to establish thermal connection between the steam injection pipeline and the production pipeline in the multilateral well model;

[0109] The heavy oil production simulation module 340 is used to connect to the steam injection pipeline after the thermal connection reaches the steam injection parameters, simulate the heavy oil production process, and maintain the monitoring of the simulated production parameters.

[0110] Based on the constructed branched well model and the physical model of the oil sand reservoir, the embodiment of the present invention uses the SAGD technology to simulate the heavy oil production process and monitors the simulated production parameters during the production process. To achieve real-time monitoring and control of the steam chamber development law and the utilization degree of the edge reserves in the oil sand reservoir developed by the branched well SAGD, so as to better implement on-site and improve the heavy oil development efficiency. And the model parameter design is carried out by fully considering the development characteristics of steam thermal recovery of the branched well during the simulated production process, which improves the accuracy of the model simulation.

[0111] Optionally, the device further includes a model numerical inversion module, including:

[0112] The model production monitoring unit is used to end the simulated heavy oil production process when it is monitored that the instantaneous gasoline production in the simulated production parameters reaches the peak;

[0113] The numerical simulation model establishment unit is used to establish a numerical simulation model for the SAGD development of the branched well according to the branched well parameters and the monitored simulated production parameters, so as to numerically simulate the heavy oil production process of the physical model of the oil sand reservoir;

[0114] The numerical model adjustment simulation unit is used to adjust the branched well parameters in the numerical simulation model to obtain the SAGD development results of different branched well models.

[0115] Optionally, the numerical simulation model establishment unit is specifically used for:

[0116] By adjusting the conductivity, relative permeability curve and the endpoint parameters of the relative permeability curve, the fitting production data results are obtained; wherein, the fitting production data results include at least one of the following: experimental reserves, cumulative steam injection, cumulative oil production, gasoline ratio and oil production rate;

[0117] If the error between the fitting data results and the monitored simulated production parameters is less than the preset error, the numerical simulation model associated with the fitting data results is the laboratory-scale model of the heavy oil production process of the physical model of the oil sand reservoir.

[0118] Optionally, the branched well model construction module 310 is specifically used for:

[0119] Wind compression springs on the branched wellbore and the main wellbore to prevent the wellbore from being blocked.

[0120] Optionally, the device further includes a preheating pipeline setting model for winding preheating pipelines on the steam injection pipeline and the production pipeline in the branched well model;

[0121] Correspondingly, the thermal connection establishment module 330 is specifically configured to:

[0122] Preheat the preheating pipeline and monitor the temperatures of the steam injection pipeline and the production pipeline in the branch well model;

[0123] If the temperature reaches the preheating temperature, inject steam at a preset steam injection rate based on the SAGD technology to make the temperature reach the steam injection temperature.

[0124] Optionally, the oil sand reservoir model construction module 320 is specifically configured to:

[0125] Adopt a high-temperature and high-pressure three-dimensional adiabatic physical model, and sequentially establish simulation layers of the bottom layer of the oil reservoir, the oil sand reservoir, and the caprock from bottom to top;

[0126] During the process of filling the oil sand in the oil sand reservoir, embed at least one temperature sensor and pressure sensor, and establish the connection between each sensor and the data acquisition device to monitor the real-time changes of the oil reservoir temperature and pressure during the SAGD exploitation process; wherein, the oil sand is simulated by quartz sand saturated with heavy oil, and the model edge is simulated by heat insulation material;

[0127] After the oil sand is filled, cover the upper cover of the pressure-bearing container for encapsulation, connect the pipelines outside the model, and wind the heating tape around the pipelines to prevent steam condensation and pipeline blockage; wherein, the pipelines include the preheating pipeline, the steam injection pipeline, and the production pipeline;

[0128] Inject nitrogen into the model to adjust and balance the internal pressure of the model, and use a constant temperature box to adjust and balance the internal temperature of the model to make the oil reservoir pressure and temperature reach preset parameters.

[0129] Optionally, the device further includes a similar model parameter setting module, which is specifically configured to:

[0130] Before constructing the branch well model according to the preset branch well parameters, set the parameters associated with the oil sand reservoir physical model from at least one dimension; wherein, the dimension includes: geometric similarity dimension, motion similarity dimension, and thermodynamic similarity dimension; the parameters include model basic parameters and production operation parameters; the model basic parameters include at least one of the following: the distance between the production pipeline and the bottom layer of the oil reservoir, the distance between branch wellbores, the length of the main wellbore, the length of a single branch wellbore, the angle of the branch wellbore, the row spacing, the thickness of the oil reservoir, the porosity, the permeability, the formation temperature, the crude oil viscosity, and the original formation pressure; the production operation parameters include at least one of the following: the preheating temperature, the steam injection temperature, the steam dryness, the preset steam injection rate, the operating pressure, and the production time.

[0131] The simulation device for SAGD development of oil sand reservoirs provided by the embodiments of the present invention can execute the simulation method for SAGD development of oil sand reservoirs provided by any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the simulation method for SAGD development of oil sand reservoirs.

[0132] Embodiment 4

[0133] Figure 11 It is a schematic structural diagram of an electronic device provided by Embodiment 4 of the present invention. Figure 11 It shows a block diagram of an exemplary electronic device 12 suitable for implementing the embodiments of the present invention. Figure 11 The shown electronic device 12 is only an example and should not impose any limitation on the functions and usage scope of the embodiments of the present invention.

[0134] As Figure 11 shown, the electronic device 12 is presented in the form of a general-purpose computing device. The components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system storage device 28, and a bus 18 connecting different system components (including the system storage device 28 and the processing unit 16).

[0135] The bus 18 represents one or more of several types of bus structures, including a storage device bus or a storage device controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the multiple bus structures. For example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0136] The electronic device 12 typically includes a variety of computer system-readable media. These media can be any available media accessible by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0137] The system storage device 28 may include computer system-readable media in the form of a volatile storage device, such as a random access storage device (RAM) 30 and / or a cache storage device 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, a storage system 34 may be used for reading and writing non-removable, non-volatile magnetic media ( Figure 11 not shown, typically referred to as a "hard disk drive"). Although Figure 11Not shown, a disk drive for reading and writing a removable non-volatile disk (e.g., "floppy disk") and an optical disk drive for reading and writing a removable non-volatile optical disk (e.g., CD-ROM, DVD-ROM or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 through one or more data medium interfaces. The storage device 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0138] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the storage device 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include the implementation of a network environment. The program modules 42 generally perform the functions and / or methods in the embodiments described in the present invention.

[0139] The electronic device 12 may also communicate with one or more external devices 14 (e.g., a keyboard, a pointing device, a display 24, etc.), and may also communicate with one or more devices that enable a user to interact with the device 12, and / or communicate with any device that enables the device 12 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). Such communication may be carried out through the input / output (I / O) interface 22. Also, the electronic device 12 may communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through the network adapter 20. As Figure 11 shown, the network adapter 20 communicates with other modules of the electronic device 12 through the bus 18. It should be understood that although Figure 11 not shown, other hardware and / or software modules may be used in conjunction with the electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0140] The processing unit 16 executes various functional applications and data processing by running programs stored in the system storage device 28, for example, implementing the simulation method for developing an oil sand reservoir by SAGD provided by the embodiments of the present invention, including:

[0141] Constructing a branched well model according to preset branched well parameters; wherein the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent well diameter of the branched wellbore, and the angle of the branched wellbore;

[0142] Constructing an oil sand reservoir physical model including the branched well model;

[0143] Based on the SAGD technology, steam is injected into the physical model of the oil sand reservoir to establish thermal communication between the steam injection pipeline and the production pipeline in the branched well model;

[0144] After the thermal communication reaches the steam injection parameters, the steam injection pipeline is connected, the heavy oil production process is simulated, and the monitoring of the simulated production parameters is maintained.

[0145] Example Five

[0146] Example Five of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the SAGD development oil sand reservoir simulation method provided by the embodiments of the present invention, including:

[0147] Construct a branched well model according to preset branched well parameters; wherein, the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent well diameter of the branched wellbore, and the angle of the branched wellbore;

[0148] Construct a physical model of the oil sand reservoir including the branched well model;

[0149] Based on the SAGD technology, steam is injected into the physical model of the oil sand reservoir to establish thermal communication between the steam injection pipeline and the production pipeline in the branched well model;

[0150] After the thermal communication reaches the steam injection parameters, the steam injection pipeline is connected, the heavy oil production process is simulated, and the monitoring of the simulated production parameters is maintained.

[0151] The computer storage medium of the embodiments of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: an electrical connection having one or more wires, 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 above. In this document, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device.

[0152] A computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device.

[0153] The program code contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wire, optical fiber, RF, etc., or any suitable combination of the foregoing.

[0154] The computer program code for performing the operations of the present invention may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0155] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it may also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A simulation method for SAGD development of oil sand reservoirs, characterized in that, it includes: Construct a multi-lateral well model according to preset multi-lateral well parameters; wherein, the multi-lateral well parameters include at least one of the following: the number of multi-lateral wellbores, the length of a single multi-lateral wellbore, the length of the main wellbore, the equivalent well diameter of the multi-lateral wellbore, and the multi-lateral wellbore angle; wherein, the preset multi-lateral well parameters are set according to the field prototype based on the similarity principle; Construct a three-dimensional physical model of the oil sand reservoir including the multi-lateral well model; Based on the SAGD technology, inject steam into the physical model of the oil sand reservoir to establish thermal communication between the steam injection pipeline and the production pipeline in the multi-lateral well model; After the thermal communication reaches the steam injection parameters, connect the steam injection pipeline, simulate the heavy oil production process, and maintain the monitoring of the simulated production parameters; Wherein, the method further includes: End the simulated heavy oil production process when the instantaneous gasoline production in the simulated production parameters is monitored to reach the peak; Establish a numerical simulation model for SAGD development of the multi-lateral well according to the multi-lateral well parameters and the monitored simulated production parameters to numerically simulate the heavy oil production process of the physical model of the oil sand reservoir; Adjust the multi-lateral well parameters in the numerical simulation model to obtain the SAGD development results of different multi-lateral well models.

2. The method according to claim 1, characterized in that, The establishing a numerical simulation model for SAGD development of the multi-lateral well according to the multi-lateral well parameters and the monitored simulated production parameters to numerically simulate the heavy oil production process of the physical model of the oil sand reservoir includes: Obtain the fitting production data results by adjusting the conductivity, relative permeability curve, and endpoint parameters of the relative permeability curve; wherein, the fitting production data results include at least one of the following: experimental reserves, cumulative steam injection, cumulative oil production, gasoline ratio, and oil production rate; If the error between the fitting production data results and the monitored simulated production parameters is less than the preset error, the numerical simulation model associated with the fitting production data results is the laboratory-scale model for the heavy oil production process of the physical model of the oil sand reservoir.

3. The method according to claim 1, characterized in that, The constructing a multi-lateral well model according to preset multi-lateral well parameters includes: Wind compression springs on the multi-lateral wellbore and the main wellbore to prevent the wellbore from being blocked.

4. The method according to claim 1, characterized in that, The method further includes: wind preheating pipelines on the steam injection pipeline and the production pipeline in the multi-lateral well model; Correspondingly, based on the SAGD technology, injecting steam into the physical model of the oil sand reservoir to establish thermal communication between the steam injection pipeline and the production pipeline in the multi-lateral well model includes: Preheat the preheating pipeline and monitor the temperatures of the steam injection pipeline and the production pipeline in the multi-lateral well model; If the temperature reaches the preheating temperature, inject steam at a preset steam injection rate based on the SAGD technology to make the temperature reach the steam injection temperature.

5. The method according to claim 1, characterized in that, The constructing a three-dimensional physical model of the oil sand reservoir including the multi-lateral well model includes: Adopt a high-temperature and high-pressure three-dimensional adiabatic physical model, and sequentially establish simulation layers of the bottom layer of the oil reservoir, the oil sand reservoir, and the caprock from bottom to top; During the process of filling the oil sand in the oil sand reservoir, at least one temperature sensor and one pressure sensor are buried, and the connection between each sensor and the data acquisition device is established to monitor the real-time changes of the temperature and pressure in the oil reservoir during the SAGD production process; wherein, the oil sand is simulated by quartz sand saturated with heavy oil, and the edge of the model is simulated by heat insulation materials; After the oil sand is filled, cover the upper cover of the pressure-bearing container for encapsulation, connect the pipelines outside the model, and wind the heating tape around the pipelines to prevent steam condensation and pipeline blockage; wherein, the pipelines include a preheating pipeline, a steam injection pipeline, and a production pipeline; Inject nitrogen into the model to adjust and balance the internal pressure of the model, and use a constant temperature box to adjust and balance the internal temperature of the model so that the oil reservoir pressure and temperature reach the preset parameters.

6. The method according to any one of claims 1-5, characterized in that, before constructing the branched well model according to the preset branched well parameters, the method further includes: setting parameters associated with the physical model of the oil sand reservoir from at least one dimension; wherein, the dimension includes: geometric similarity dimension, kinematic similarity dimension, and thermodynamic similarity dimension; the parameters include model basic parameters and production operation parameters; the model basic parameters include at least one of the following: the distance between the production pipeline and the bottom layer of the oil reservoir, the distance between branched wellbores, the length of the main wellbore, the length of a single branched wellbore, the angle of the branched wellbore, the row spacing, the thickness of the oil reservoir, porosity, permeability, formation temperature, crude oil viscosity, and original formation pressure; the production operation parameters include at least one of the following: preheating temperature, steam injection temperature, steam dryness, preset steam injection rate, operating pressure, and production time.

7. A simulation device for SAGD development of an oil sand reservoir, characterized in that, comprising: a branched well model construction module for constructing a branched well model according to preset branched well parameters; wherein, the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent well diameter of the branched wellbore, and the angle of the branched wellbore; wherein, the preset branched well parameters are set according to the field prototype based on the similarity principle; an oil sand reservoir model construction module for constructing a three-dimensional physical model of the oil sand reservoir including the branched well model; a thermal communication establishment module for injecting steam into the physical model of the oil sand reservoir based on the SAGD technology to establish thermal communication between the steam injection pipeline and the production pipeline in the branched well model; a heavy oil production simulation module for accessing the steam injection pipeline after the thermal communication reaches the steam injection parameters, simulating the heavy oil production process, and maintaining the monitoring of the simulated production parameters; wherein, the device further includes a model numerical inversion module, and the model numerical inversion module includes: a model production monitoring unit for ending the simulated heavy oil production process when it is monitored that the instantaneous gasoline production in the simulated production parameters reaches the peak; A numerical simulation model building unit, configured to build a numerical simulation model for SAGD development of a branched well according to the branched well parameters and the monitored simulated production parameters, so as to perform numerical simulation on the heavy oil production process of the oil sand reservoir physical model; A numerical model adjustment and simulation unit, configured to adjust the branched well parameters in the numerical simulation model to obtain the SAGD development results of different branched well models.

8. An electronic device, characterized in that, it includes: one or more processors; a storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enabling the one or more processors to implement the simulation method for SAGD development of an oil sand reservoir as described in any one of claims 1-6.

9. A computer-readable storage medium, having a computer program stored thereon, characterized in that, when the program is executed by a processor, it implements the simulation method for SAGD development of an oil sand reservoir as described in any one of claims 1-6.

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