A multi-stage coupled diagenesis simulation device and method

Abstract

The present specification relates to the technical field of oil and gas field exploration and development, and particularly relates to a multi-stage coupled diagenesis simulation device and method. The device comprises: a double-layer cylinder body, comprising: an inner cylinder body and an outer cylinder body, a hollow layer being formed between the inner cylinder body and the outer cylinder body; the inner cylinder body being provided with an airtight valve at the bottom; an input valve, comprising a bend pipe and a straight pipe, the input valve being arranged on the upper part of the double-layer cylinder body, extending into the inner cylinder body from the outside of the outer cylinder body; a driving module, connected with the airtight valve, used for driving the airtight valve to move and sending a moving parameter to a control module; the control module, used for controlling the environmental conditions in the hollow layer or the inner cylinder body; and used for receiving the moving parameter sent by the driving module and controlling the driving module to move to a preset position. The present application simulates open or closed diagenetic environment, is designed based on actual geological conditions and can realize simulation of the sequence and evolution process of compaction, uplift, dissolution, cementation and other diagenetic processes.

Description

Technical Field

[0001] This specification relates to the field of oil and gas field exploration and development technology, and in particular to a multi-stage coupled diagenesis simulation device and method. Background Technology

[0002] The need for physical simulations of diagenesis stems from the prediction of high-quality reservoir distribution. The increasing demand for oil and gas, natural hydrogen, and carbon dioxide has driven quantitative analysis of reservoir diagenesis and porosity evolution.

[0003] Early diagenetic simulations primarily relied on qualitative observations, such as microscopic analysis of mineral cementation characteristics. With the development of computer technology, process-based numerical models emerged at the end of the 20th century, quantitatively simulating the evolution of diagenetic stages by coupling parameters such as temperature, pressure, and fluid chemistry. In recent years, breakthroughs in laboratory high-temperature and high-pressure technologies (such as diamond pressure chambers reaching 300 GPa) and advancements in numerical algorithms have made it possible to simulate deep, high-temperature and high-pressure geological processes. However, diagenetic simulation still faces several prominent challenges: (1) Diagenesis under geological conditions is a slow, "low-temperature, long-term" geological process. However, laboratory physical simulations generally use the "time-temperature compensation principle" to accelerate the reaction process using "high-temperature, short-time" simulations. This may alter the reaction process and products, and fail to fully simulate the natural evolution process. Diagenesis, especially the chemical processes involved (such as mineral dissolution, precipitation, and transformation), is controlled by chemical reaction kinetics. Temperature is the most effective "catalyst" for accelerating these reactions. The time-temperature compensation principle utilizes this principle, based on the exponential increase in chemical reaction rate with increasing temperature, to "compensate" for the unachievable geological time by increasing the experimental temperature. Specifically, a high temperature (such as 300-600℃) is set in the experiment, allowing the minerals to complete a reaction within a few days or months, which is equivalent to undergoing millions of years of changes in a low-temperature underground environment (such as 50-150℃). In addition, high temperature is the core of time compensation. By significantly increasing the experimental temperature (far exceeding the actual underground temperature), the reaction rate is increased by millions of times, allowing a process that takes tens of millions of years to be completed within weeks.

[0004] (2) The underground diagenetic environment is a highly coupled system of multiple fields such as temperature field, stress field, chemical field and fluid field. It is difficult for the laboratory to completely replicate the complex diagenetic environment process in nature, which involves high temperature and high pressure, multi-physical field coupling, fluid transport and superposition of these factors. Existing diagenetic simulation experimental devices still have difficulty in realizing simulations of multi-field coupling of "temperature-pressure-flow", simulations of different diagenetic sequences, superposition and coupling.

[0005] Existing devices are mostly designed for single diagenetic processes (such as simulating only compaction or dissolution), and complex diagenetic simulations can be completed by switching between multiple devices. There is a lack of comprehensive simulation schemes for multiple diagenetic processes. Summary of the Invention

[0006] To address the problems in the prior art, this specification provides a multi-stage coupled diagenesis simulation device and method. The device includes: a double-layer cylinder body comprising an inner cylinder body and an outer cylinder body, with a hollow layer formed between the inner and outer cylinder bodies; an airtight valve at the bottom of the inner cylinder body for regulating the pressure inside the inner cylinder body; an input valve comprising a bent pipe and a straight pipe, the input valve being located on the upper part of the double-layer cylinder body and extending from the outside of the outer cylinder body into the inside of the inner cylinder body; wherein the bent pipe is used to input material into the outer cylinder body, and the straight pipe is used to input material into the inner cylinder body; a drive module connected to the airtight valve for driving the airtight valve to move and sending movement parameters to a control module; and a control module for controlling the environmental conditions inside the hollow layer or the inner cylinder body, and for receiving the movement parameters sent by the drive module and controlling the drive module to move to a preset position.

[0007] According to one aspect of an embodiment of this specification, the device further includes: a support assembly; the support assembly is connected to both ends of the outer cylinder and fixed to the bottom of the double-layer cylinder, for supporting the double-layer cylinder and reserving a preset space at the bottom of the double-layer cylinder; the drive module includes: a threaded screw rod.

[0008] According to one aspect of an embodiment of this specification, the input valve further includes: a first input valve and a second input valve, the first input valve and the second input valve each having a bend and a straight pipe respectively; the straight pipe of the first input valve is used to input a first medium into the inner cylinder; the bend of the first input valve is used to input the first medium into the outer cylinder; the straight pipe of the second input valve is used to input a second medium into the inner cylinder; and the bend of the second input valve is used to input the second medium into the outer cylinder.

[0009] According to one aspect of an embodiment of this specification, the control module includes: an ignition assembly; the hollow layer is used to contain combustible material; the control module is used to control the environmental conditions inside the hollow layer or the inner cylinder, including: igniting the combustible material inside the hollow layer or the inner cylinder when preset conditions are met.

[0010] This specification provides a multi-stage coupled diagenesis simulation method, which includes: adding target layer sandstone particles into an inner cylinder, closing the inner cylinder with an airtight valve, adding simulated formation water into the inner cylinder through an input valve; inputting combustible material into the hollow layer and igniting it, and increasing the temperature and pressure inside the inner cylinder to determine whether the initial compaction conditions have been met; igniting the combustible material in the inner cylinder to determine whether diagenesis conditions have been met inside the inner cylinder; if so, controlling the drive module to move to simulate the formation uplift process.

[0011] According to one aspect of the embodiments of this specification, controlling the movement of the drive module to simulate the formation uplift process includes: determining the simulated formation uplift distance according to the experimental simulation requirements; determining the direction to be moved and the distance to be moved of the drive module according to the simulated formation uplift distance; and controlling the drive module to move according to the direction to be moved and the distance to be moved.

[0012] According to one aspect of an embodiment of this specification, the method further includes: injecting an acidic fluid into the inner cylinder from the input valve to simulate underground dissolution.

[0013] This specification also provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the multi-stage coupled diagenesis simulation method.

[0014] This specification also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the multi-stage coupled diagenesis simulation method.

[0015] This application can simulate open or closed diagenetic environments, and can simulate the sequence and evolution of diagenetic processes such as compaction, uplift, dissolution, and cementation based on actual geological conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 The diagram shown is a schematic diagram of a multi-stage coupled diagenesis simulation system according to an embodiment of this specification. Figure 2 The diagram shown is a structural schematic of a multi-stage coupled diagenesis simulation experimental device according to an embodiment of this specification. Figure 3 The diagram shown is a structural schematic of another multi-stage coupled diagenesis simulation experimental device according to an embodiment of this specification. Figure 4 The diagram shown is a flowchart of a multi-stage coupled diagenesis simulation method according to an embodiment of this specification; Figure 5 The diagram shown is a flowchart of a method for simulating a formation uplift process according to an embodiment of this specification. Figure 6The diagram shown is a structural schematic of a multi-stage coupled diagenesis simulation device according to an embodiment of this specification. Figure 7 The diagram shown is a structural schematic of a computer device according to an embodiment of this specification.

[0018] Explanation of symbols in the attached drawings: 110. Terminal; 120. Server; 100. Double-layer cylinder block; 102. Inner cylinder block; 103. Outer cylinder block; 104. Hollow layer; 105. Airtight valves; 200. Input valve; 201. First input valve; 202. Second input valve; 203. Sandstone particles; 204. Simulated formation water; 205. Mixed gas; 300. Driver module; 400. Control module; 500. Support components; 501. Temperature sensor; 502. Pressure sensor; 601. Input Unit; 602. Heating and pressurizing unit; 603. Judgment Unit; 604. Control unit; 704, Processor; 706. Memory; 708. Drive mechanism; 710. Input / Output Module; 712. Input devices; 714. Output devices; 716. Presentation equipment; 718. Graphical User Interface; 720. Network interface; 722. Communication link; 725. Communication bus. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0021] This specification provides the operational steps of the methods described in the embodiments or flowcharts, but based on conventional or non-inventive labor, more or fewer operational steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only possible execution order. In actual system or device products, the methods shown in the embodiments or drawings can be executed sequentially or in parallel.

[0022] It should be noted that the multi-stage coupled diagenesis simulation device and method described in this specification can be used in the field of oil and gas field exploration and development technology. This specification does not limit the application field of the multi-stage coupled diagenesis simulation device and method.

[0023] The acquisition, transmission, storage, use, and processing of data in this application comply with relevant laws and regulations. It should be noted that certain software, components, models, and other existing industry solutions may be mentioned in the embodiments of this application. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0024] like Figure 1The diagram illustrates a multi-stage coupled diagenesis simulation system according to an embodiment of the present invention. The system may include a terminal 110 and a server 120. The terminal 110 and server 120 communicate via a network, which may include a Local Area Network (LAN), a Wide Area Network (WAN), the Internet, or a combination thereof, and is connected to a website, user equipment (e.g., computing devices), and a backend system. Operators can send simulation experiment requests to the server 120 via the terminal 110. Upon receiving the simulation experiment request, the server 120 adds sandstone particles from the target layer to the inner cylinder, seals the inner cylinder with an airtight valve, and adds simulated formation water to the inner cylinder via an input valve. It then introduces combustible material into the hollow layer and ignites it. If the initial compaction conditions are met in the hollow layer, the system increases the temperature and pressure within the inner cylinder. The combustible material in the inner cylinder is ignited, and it is determined whether diagenesis conditions have been met within the inner cylinder. If so, the system controls the drive module to move and simulate the formation uplift process, and sends the formation uplift results to the terminal 110.

[0025] In the embodiments of this specification, the server 120 may be an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDN), and big data and artificial intelligence platforms.

[0026] In an optional embodiment, terminal 110 may be an electronic device, including but not limited to self-service terminal equipment, desktop computers, tablet computers, laptops, smart wearable devices, etc. Optionally, the operating system running on the electronic device may include, but is not limited to, Android, iOS, Linux, Windows, etc. Of course, terminal 110 is not limited to the aforementioned physical electronic devices; it may also be software running on the aforementioned electronic devices.

[0027] In addition, it should be noted that, Figure 1 The example shown is merely one application environment provided by this disclosure. In actual applications, it may include multiple terminals 110, and this specification does not impose any restrictions.

[0028] Figure 2 The diagram shown is a structural schematic of a multi-stage coupled diagenesis simulation device according to an embodiment of this specification. Specifically, it includes the following components: a double-layer cylinder 100, an input valve 200, a drive module 300, and a control module 400.

[0029] The double-layer cylinder body 100 includes an inner cylinder body 102 and an outer cylinder body 103, with a hollow layer 104 formed between the inner cylinder body 102 and the outer cylinder body 103. The bottom of the inner cylinder body 102 has an airtight valve 105, which is used to regulate the pressure inside the inner cylinder body 102. The hollow layer 104 is used to contain flammable media.

[0030] An input valve 200 includes a bent pipe and a straight pipe. The input valve 200 is located on the upper part of the double-layer cylinder body 100, extending from the outside of the outer cylinder body 103 into the interior of the outer cylinder body 103 and the interior of the inner cylinder body 102. The bent pipe is used to input a medium into the outer cylinder body 103, and the straight pipe is used to input a medium into the interior of the inner cylinder body 102. The straight pipe and the bent pipe can be separately installed as shown in the figure, or they can be integrated into a single unit (not shown in the figure). In some embodiments of this specification, the straight pipe can be used to input simulated formation water and simulated gas into the interior of the inner cylinder body 102; the bent pipe can be used to input a combustible mixture, such as a mixture of methane and oxygen, or a mixture of kerosene and oxygen, into the interior of the outer cylinder body 103. Therefore, a mixed gas 205 is present in the inner cylinder body.

[0031] The drive module 300 is a driving component used for formation simulation in a multi-stage coupled diagenesis simulation device. The drive module 300 is connected to the airtight valve 105 at the bottom of the inner cylinder 102, controlling the movement of the airtight valve 105 and sending movement parameters to the control module in the device. In this specification, the airtight valve is equipped with a pressure relief valve 106 to control the discharge of fluid from the inner cylinder. In this application, the drive module 300 may include a threaded screw, and may further include driving components such as a stepper motor and a servo motor, with the driving accuracy of the driving components matching the experimental simulation accuracy. In the specific implementation of this application, the drive module 300 can ensure that the movement distance error of the threaded screw is controlled within a preset range.

[0032] The control module 400 is used to control the environmental conditions inside the hollow layer or inner cylinder; and to receive movement parameters sent by the drive module and control the drive module to move to a preset position. The control module 400 includes an ignition assembly (not shown in the figure), which can also be located on the upper part of the double-layer cylinder 100. The ignition assembly includes a curved pipe and a straight pipe, extending from the outside of the outer cylinder 103 into the interior of the outer cylinder 103 and the inner cylinder 102 respectively, to ignite the combustible materials inside the hollow layer and the inner cylinder. Specifically, when the preset environmental conditions are reached inside the hollow layer or the inner cylinder, the control module 400 ignites the combustible materials inside the hollow layer or the inner cylinder. As shown in the figure, during the experimental preparation stage, target layer sandstone particles 203 are added to the inner cylinder, the airtight valve is turned in to seal the inner cylinder, and simulated formation water 204 is added to the inner cylinder through the input valve.

[0033] In some embodiments of this specification, the control module 400 receives data such as the actual moving position and moving speed of the threaded rod sent by the drive module 300 in real time, and compares it with the preset moving direction and moving distance. If the difference between the actual moving distance of the rod and the preset distance exceeds the preset allowable error, the control module 400 generates an adjustment signal to control the drive module 300 to correct the moving state of the threaded rod and ensure that the rod accurately reaches the preset position.

[0034] Once the threaded auger has moved to the preset position, the drive module 300 stops working, the threaded auger remains fixed, and the formation simulation module completes one formation uplift simulation. Based on the formation simulation state at this time, the experimenters carry out subsequent experimental operations such as diagenesis detection and porosity change analysis.

[0035] In some embodiments of this specification, the multi-stage coupled diagenesis simulation device further includes a support assembly 500. The support assembly 500 is connected to both ends of the outer cylinder 103 and fixed to the bottom of the double-layer cylinder 100, for supporting the double-layer cylinder 100 and reserving a preset space at the bottom of the double-layer cylinder 100.

[0036] In some embodiments of this specification, the multi-stage coupled diagenesis simulation device further includes a temperature sensor 501 and a pressure sensor 502. The temperature sensor 501 and the pressure sensor 502 are respectively disposed at the top of the inner cylinder.

[0037] like Figure 3 The diagram shows a schematic of another multi-stage coupled diagenesis simulation device according to an embodiment of this specification. In the diagram, the first input valve 201 is used to input liquid into the outer cylinder and the inner cylinder respectively; the second input valve 202 is used to input gas into the outer cylinder and the inner cylinder respectively.

[0038] In some embodiments of this specification, the input valve further includes a first input valve 201 and a second input valve 202. The first input valve and the second input valve each have a bent pipe and a straight pipe, respectively. In these embodiments, the first input valve 201 can be a liquid input valve; the second input valve 202 can be a gas input valve. The straight pipe of the first input valve is used to input a first medium into the inner cylinder, which can be simulated formation water; the bent pipe of the first input valve is used to input a first medium into the outer cylinder, which can be kerosene. The straight pipe of the second input valve is used to input a second medium into the inner cylinder, which can be oxygen, hydrogen, methane, or any combination thereof; the bent pipe of the second input valve is used to input a first medium into the outer cylinder, which can be oxygen.

[0039] In some embodiments of this specification, the multi-stage coupled diagenesis simulation device further includes a temperature sensor 501 and a pressure sensor 502. The temperature sensor 501 and the pressure sensor 502 are respectively disposed at the top of the inner cylinder.

[0040] In some embodiments of this specification, the multi-stage coupled diagenesis simulation device further includes a one-way valve 107, which is located at the top of the hollow layer and is used to control the gas in the hollow layer to enter the inner cylinder.

[0041] Figure 4 The diagram shown is a flowchart of a multi-stage coupled diagenesis simulation method according to an embodiment of this specification, which specifically includes the following steps: Step 410: Add sandstone particles from the target layer into the inner cylinder, screw in the airtight valve to seal the inner cylinder, and add simulated formation water into the inner cylinder through the input valve.

[0042] In this specification, during the initial compaction process, sandstone particles are compressed by overlying loads, reducing the interparticle spacing. Simulated formation water within these gaps is forcibly expelled, carrying with it small amounts of fine-grained mudstone and clay mineral debris, further filling the micropores and intensifying particle contact. Simulated formation water adheres to the surface of the sandstone particles, forming a water film. To simulate the initial compaction during diagenesis, this step involves adding simulated reservoir sandstone particles to the inner cylinder. Simulated formation water (real formation water typically includes seawater, brackish water, and a small amount of freshwater from the atmosphere) is then added to the inner cylinder through the inlet valve, ensuring thorough contact and mixing between the simulated formation water and the sandstone particles, thus completing the experimental preparation. The sandstone particles are as follows: Figure 2 and Figure 3 The brown portion inside the inner cylinder, as shown, simulates formation water. Figure 2 and Figure 3 The blue part is shown in the image.

[0043] Step 420: Introduce combustible material into the hollow layer and ignite it. Once the initial compaction conditions are met in the hollow layer, increase the temperature and pressure inside the inner cylinder.

[0044] In this step, combustible materials are introduced into the hollow layer through liquid and gas inlet valves. These combustible materials include, but are not limited to, mixtures of kerosene and oxygen, or mixtures of methane and oxygen. Thermodynamic calculations are used to control the amount and ratio of gas and liquid introduced into the hollow layer to ensure that the initial compaction conditions required for the simulation are achieved. In the diagenesis of oil and gas fields, the initial compaction conditions refer to the earliest stage when sediments have just detached from the sedimentary interface and entered the burial stage. These conditions determine the strength of the first stage of compaction by the sum of physical, sedimentary, and fluid environments. In this step, the initial compaction conditions are typically a low-temperature environment, with temperatures roughly the same as the surface temperature. The pressures corresponding to these initial compaction conditions are mainly low overlying pressure and hydrostatic pore pressure, with low but rapidly increasing effective stress. Compaction is primarily driven by mechanical drainage and particle reorganization.

[0045] Once the hollow layer reaches the initial compaction conditions, the ignition assembly is activated to ignite the gas-liquid mixture within the hollow layer. After the inner cylinder reaches the preset temperature, the one-way valve inside the hollow layer is opened to pressurize the inner cylinder. Once the temperature and pressure inside the hollow layer meet the experimental simulation requirements, the one-way valve is closed.

[0046] In the embodiments described in this specification, the initial compaction conditions correspond to a temperature of 60 degrees Celsius and a pressure of approximately 8 MPa.

[0047] Step 430: Ignite the combustible material in the inner cylinder to determine whether the conditions for diagenesis have been met inside the inner cylinder.

[0048] In this step, simulated gas is added to the inner cylinder through the gas input valve based on the experimental simulation requirements. The simulated gas can be a mixture of methane and oxygen, a mixture of hydrogen and oxygen, or a mixture of methane, hydrogen, and oxygen, etc. The proportions and intake volumes of each gas in the mixture are determined through thermodynamic calculations to ensure that the required temperature and pressure conditions for the simulation are met.

[0049] After adding simulated gas into the inner cylinder, the ignition assembly is activated to ignite the gas in the inner cylinder, allowing it to burn completely and reach the temperature and pressure required for diagenesis. In some embodiments of this specification, the temperature required for diagenesis is approximately 150 degrees Celsius, and the pressure required for diagenesis is approximately 80 MPa.

[0050] In this application, methane or hydrogen is ignited in the inner cylinder, and high temperature and pressure are generated by controlling the air intake and the ratio of methane to oxygen through thermodynamic calculations to simulate formation temperature and pressure. The combustion products in the inner cylinder can serve as diagenetic fluids and participate in the diagenetic reaction. Furthermore, the diagenetic fluids can be adjusted via input and pressure relief valves, overcoming the limitation of traditional diagenetic simulation devices where the diagenetic fluid cannot be added or altered in the reactor. This simulates a reaction system that more closely resembles the environment in which natural diagenesis occurs.

[0051] Step 440: If yes, control the movement of the rotary rod to simulate the formation uplift process.

[0052] In this step, the control module calculates and determines the direction and distance to be moved of the drive module to be controlled according to the experimental simulation requirements, and further generates an adjustment signal to control the movement of the drive module, thereby adjusting the relative position of the airtight valve connected to the threaded rod in the drive module and the inner cylinder. The airtight valve moves relative to the inner cylinder by screwing in the threaded rod on the support assembly, thereby controlling the pressure in the inner cylinder by compressing or expanding the volume of the inner cylinder.

[0053] The control module ensures that the rotary rod accurately reaches the preset position. Ultimately, it changes the total volume of the reaction system in the inner cylinder, controls the pressure inside the inner cylinder, and simulates the process of formation uplift or subsidence.

[0054] This application can adjust the simulation steps according to the experimental simulation requirements to simulate the multi-field and multi-stage coupled diagenetic process of "temperature-pressure-flow", and realize the continuous simulation of the entire process of diagenetic evolution under underground conditions.

[0055] In some embodiments of this specification, organic acid can also be added to the inner cylinder through the input valve of the device to simulate the dissolution effect under underground high temperature and high pressure conditions.

[0056] This application can simulate open or closed diagenetic environments, and can simulate the sequence and evolution of diagenetic processes such as compaction, uplift, dissolution, and cementation based on actual geological conditions.

[0057] Figure 5 The diagram shown is a flowchart of a method for simulating a formation uplift process according to an embodiment of this specification, which specifically includes the following steps: Step 510: Determine the simulated distance of formation uplift according to the experimental simulation requirements.

[0058] In this step, the desired uplift distance of the strata to be simulated can be clearly defined in the experimental simulation requirements. These requirements are determined based on specific geological research objectives, experimental scenarios, and simulation accuracy requirements. Specifically, the experimental simulation requirements can be determined by researchers based on historical uplift data of the target simulation area, the uplift magnitude corresponding to diagenetic studies, the simulation scale, and the required simulation accuracy. Specifically, researchers can obtain the actual uplift distance of the target strata in the simulation area by consulting geological survey data, borehole data, and stratigraphic profile records, and then calculate the simulated uplift distance by combining this with the simulation scale of the experimental setup.

[0059] For example, if the actual uplift distance of the target stratum is 100m and the simulation scale of the multi-stage coupled diagenesis simulation device is 1:1000, then the converted simulated stratum uplift distance is 10cm.

[0060] Step 520: Determine the direction and distance to be moved of the drive module based on the simulated ground uplift distance.

[0061] In this specification, the drive module includes a threaded rotary rod. The direction of movement of the threaded rotary rod is consistent with the direction of formation uplift. Specifically, if the actual direction of formation uplift is vertically upward, the direction of movement of the threaded rotary rod must match the direction of formation uplift, i.e., vertically upward. If the actual direction of formation uplift is vertically downward, the direction of movement of the threaded rotary rod is vertically downward.

[0062] In this specification, the movement distance of the threaded screw rod and the simulated formation uplift distance have a transmission ratio relationship. The transmission ratio is the ratio of the movement distance of the threaded screw rod to the uplift distance of the formation simulation module, and this transmission ratio is preset by the mechanical structure parameters of the experimental device. Based on the preset transmission ratio and the simulated formation uplift distance determined in step 510, the desired movement distance of the screw rod is calculated.

[0063] For example, if the transmission ratio is set to 1:1, the distance the threaded spool needs to move is equal to the simulated distance of formation uplift; if the transmission ratio is set to 2:1, the distance the threaded spool needs to move is twice the simulated distance of formation uplift.

[0064] After determining the simulated formation uplift distance in step 520, the distance to be moved by the threaded auger is calculated based on the preset transmission ratio parameters. In some embodiments of this specification, the distance to be moved can also be verified a second time to ensure that it does not exceed the maximum travel distance of the auger, thus avoiding damage to the multi-stage coupled diagenesis simulation device due to excessive travel.

[0065] Step 530: Control the drive module to move according to the direction and distance to be moved.

[0066] In this step, the direction and distance of movement of the screw rod determined in step 520 are converted into control signals recognizable by the drive module and sent to the drive module. The drive module then drives the screw rod to move according to preset parameters, causing the airtight valve connected to the screw rod to move relative to the inner cylinder. By compressing or expanding the volume of the inner cylinder, the pressure in the inner cylinder is controlled, thus completing the formation uplift simulation. In this specification, a pressure relief valve is installed on the airtight valve to control the discharge of fluid from the inner cylinder.

[0067] Furthermore, to enhance the flexibility and applicability of the simulation process, the control rod can be moved at a preset speed or in segments, depending on the experimental requirements. The preset speed can be determined based on the actual formation uplift rate (e.g., if the actual uplift rate is 0.1 mm / a, converted to the experimental speed using the simulation scale). Segmented movement can be used to simulate intermittent formation uplift, where the control rod moves a certain distance, pauses for a preset time, and then continues moving, mirroring the discontinuous nature of actual formation uplift and further enhancing the realism of the simulation experiment.

[0068] This application achieves accurate and controllable simulation of the formation uplift process by determining parameters such as the simulated uplift distance, the distance to be moved, and the distance to be moved. It is simple to operate, highly automated, and adaptable to formation uplift simulation experiments with different geological scenarios and different accuracy requirements, providing a reliable experimental means for the study of diagenesis in oil and gas fields and reservoir evolution analysis.

[0069] In some embodiments of this specification, the multi-stage coupled diagenesis simulation method further includes: injecting acidic fluid into the inner cylinder from the input valve to simulate underground dissolution.

[0070] Figure 6 The diagram shown is a structural schematic of a multi-stage coupled diagenesis simulation device according to an embodiment of this specification. The basic structure of the multi-stage coupled diagenesis simulation device is illustrated in this figure. The functional units and modules can be implemented using software, or using general-purpose chips or specific chips to simulate multi-stage coupled diagenesis. The device specifically includes: Input unit 601 is used to add target layer sandstone particles into the inner cylinder, screw in the airtight valve to seal the inner cylinder, and add simulated formation water into the inner cylinder through the input valve; The heating and pressurizing unit 602 is used to input combustible materials into the hollow layer and ignite them. When the initial compaction conditions are reached in the hollow layer, the heating and pressurizing are increased into the inner cylinder. The judgment unit 603 is used to ignite the combustible material in the inner cylinder and determine whether the conditions for diagenesis have been met in the inner cylinder. Control unit 604 is used to control the movement of the drive module to simulate the formation uplift process if necessary.

[0071] like Figure 7 The diagram shown is a schematic representation of a computer device provided in an embodiment of this specification. The multi-stage coupled diagenesis simulation method described in this application can be applied to the computer device. The computer device 702 may include one or more processors 704, such as one or more central processing units (CPUs), each of which may implement one or more hardware threads. The computer device 702 may also include any memory 706 for storing information of any kind, such as code, settings, data, etc. Without limitation, for example, the memory 706 may include any type of RAM, any type of ROM, flash memory, hard disk, optical disk, etc. More generally, any memory can use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of the computer device 702. In one case, when the processor 704 executes associated instructions stored in any memory or combination of memories, the computer device 702 may perform any operation of the associated instructions. The computer device 702 also includes one or more drive mechanisms 708 for interacting with any memory, such as hard disk drive mechanisms, optical disk drive mechanisms, etc.

[0072] Computer device 702 may also include an input / output module 710 (I / O) for receiving various inputs (via input device 712) and providing various outputs (via output device 714). A specific output mechanism may include a presentation device 716 and an associated graphical user interface (GUI) 718. In other embodiments, the input / output module 710 (I / O), input device 712, and output device 714 may be omitted, and the device may function solely as a computer device within a network. Computer device 702 may also include one or more network interfaces 720 for exchanging data with other devices via one or more communication links 722. One or more communication buses 725 couple the components described above together.

[0073] Communication link 722 can be implemented in any way, such as via a local area network, a wide area network (e.g., the Internet), a point-to-point connection, or any combination thereof. Communication link 722 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc., governed by any protocol or combination of protocols.

[0074] Corresponding to Figures 4 to 5 In addition to the methods described above, embodiments of this specification also provide a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of the methods described above.

[0075] This specification also provides computer-readable instructions, wherein when a processor executes the instructions, the program therein causes the processor to perform the following... Figures 4 to 5 The method shown.

[0076] It should be understood that in the various embodiments of this specification, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this specification.

[0077] It should also be understood that, in the embodiments of this specification, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this specification generally indicates that the preceding and following related objects have an "or" relationship.

[0078] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this specification can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this specification.

[0079] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0080] In the several embodiments provided in this specification, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, devices, or units, or they may be electrical, mechanical, or other forms of connection.

[0081] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments described in this specification, depending on actual needs.

[0082] Furthermore, the functional units in the various embodiments of this specification 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.

[0083] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this specification, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this specification. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0084] This specification uses specific embodiments to illustrate the principles and implementation methods of this specification. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this specification. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this specification. Therefore, the content of this specification should not be construed as a limitation of this specification.

Claims

1. A multi-stage coupled diagenesis simulation device, characterized in that, The device includes: A double-layer cylinder body, comprising an inner cylinder body and an outer cylinder body, with a hollow layer formed between the inner and outer cylinder bodies; the bottom of the inner cylinder body has an airtight valve; the airtight valve is used to regulate the pressure inside the inner cylinder body; An input valve includes a bent pipe and a straight pipe. The input valve is located on the upper part of the double-layer cylinder body and extends from the outside of the outer cylinder body into the interior of the outer cylinder body and the interior of the inner cylinder body, respectively. The bent pipe is used to input the medium into the outer cylinder body, and the straight pipe is used to input the medium into the interior of the inner cylinder body. A drive module, which is connected to the airtight valve, is used to drive the airtight valve to move and send movement parameters to the control module; The control module is used to control the environmental conditions inside the hollow layer or the inner cylinder; and to receive the movement parameters sent by the drive module and control the drive module to move to a preset position.

2. The apparatus according to claim 1, characterized in that, The device further includes: Support assembly; the support assembly is connected to both ends of the outer cylinder body and fixed to the bottom of the double-layer cylinder body, used to support the double-layer cylinder body and reserve a preset space for the lower part of the double-layer cylinder body; The drive module includes a threaded rotor.

3. The apparatus according to claim 1, characterized in that, The input valve further includes: A first input valve and a second input valve, wherein the first input valve and the second input valve each have a bend and a straight pipe, respectively; The straight pipe of the first input valve is used to input the first medium into the inner cylinder; The bend in the first input valve is used to input the first medium into the outer cylinder. The straight pipe of the second input valve is used to input the second medium into the inner cylinder; The bend in the second input valve is used to input the second medium into the outer cylinder.

4. The apparatus according to claim 1, characterized in that, The control module includes: an ignition assembly; The hollow layer is used to contain flammable materials; The control module is used to control the environmental conditions inside the hollow layer or inner cylinder, including: igniting combustible materials inside the hollow layer or inner cylinder when preset conditions are met.

5. A multi-stage coupled diagenesis simulation method, characterized in that, The method is applied to the apparatus according to any one of claims 1 to 4, and the method comprises: Add sandstone particles from the target layer into the inner cylinder, screw in the airtight valve to seal the inner cylinder, and add simulated formation water into the inner cylinder through the input valve; Combustible material is introduced into the hollow layer and ignited. When the initial compaction conditions are reached in the hollow layer, the temperature and pressure are increased in the inner cylinder. Ignite the combustible material in the inner cylinder to determine whether the conditions for diagenesis have been met inside the inner cylinder. If so, the control drive module moves to simulate the formation uplift process.

6. The multi-stage coupled diagenesis simulation method according to claim 5, characterized in that, The control and drive module movement simulates the formation uplift process, including: The simulated distance for formation uplift was determined based on the requirements of the experimental simulation. Based on the simulated ground uplift distance, the direction and distance to be moved of the drive module are determined. The drive module is controlled to move in the direction and distance to be moved.

7. The multi-stage coupled diagenesis simulation method according to claim 5, characterized in that, The method further includes: Acidic fluid is injected into the inner cylinder through the input valve to simulate underground dissolution.

8. A multi-stage coupled diagenesis simulation device, characterized in that, The device includes: The input unit is used to add sandstone particles of the target layer into the inner cylinder, screw in the airtight valve to seal the inner cylinder, and add simulated formation water into the inner cylinder through the input valve; The heating and pressurizing unit is used to input combustible materials into the hollow layer and ignite them. When the initial compaction conditions are reached in the hollow layer, the temperature and pressure are increased in the inner cylinder. The judgment unit is used to ignite the combustible material in the inner cylinder and determine whether the conditions for diagenesis have been met in the inner cylinder. The control unit is used to control the movement of the drive module to simulate the formation uplift process.

9. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method according to any one of claims 5 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method according to any one of claims 5 to 7.

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