Experimental system and method for simulating magma invasion and eruption effect on stratum transformation

Abstract

The invention discloses an experimental system and method for simulating magma invasion and eruption to reform strata. The system can comprise a sand box, a power supply device and a temperature and pressure device, wherein the power supply device is positioned on the side surface of the sand box and is connected with a side plate of the sand box so as to provide power for simulating deformation for the sand box; an openable window is arranged at the lower part of the sand box, the warm pressing device is positioned below the sand box, and a nozzle of the warm pressing device can extend into the sand box through the window; simulation magma fluid in the temperature and pressure device enters the sand box through the nozzle and the window so as to simulate the transformation effect of magma invasion and eruption on the stratum in the simulation tectonic deformation process. The system can simulate the magma invasion and eruption process, meanwhile, research on magma invasion, eruption and the transformation effect on a pre-existing structure in an overlying stratum can be carried out in the structure deformation process, and then the understanding of magma activity on the transformation effect of an overlying undeformed geologic model, a synchronously deformed geologic model and a deformed geologic model is improved.

Description

Technical Field

[0001] The invention relates to the technical field of geological structure simulation, and in particular to an experimental system and method for simulating magma intrusion and eruption to transform strata. Background Art

[0002] Structural physical simulation is the main method for studying the formation and evolution process and mechanism of geological structures in nature. The sand box device is mainly used in the simulation process. Since its invention in the 19th century, the physical simulation experiment of structural deformation in the experimental sand box has been widely used in the structural deformation of oil and gas sedimentary basins. It is an important means to study complex structural deformation and its mechanism, and it is also an important method for quantitative analysis and evaluation of the formation and evolution of oil and gas structural closures. Summary of the invention

[0003] In order to carry out research on magma intrusion, eruption and the transformation of pre-existing structures in the overlying crust (strata) during tectonic deformation, and to truly simulate the tectonic evolution process in order to enrich technical routes and increase selection space, an experimental system and method for simulating the transformation of strata by magma intrusion and eruption are provided in the embodiments of the present invention.

[0004] In a first aspect, an embodiment of the present invention provides an experimental system for simulating magma intrusion and eruption to transform strata, which may include: a sand box, a power supply device, and a temperature and pressure device;

[0005] Wherein, the power supply device is located on the side of the sand box and connected to the side plate of the sand box to provide the sand box with power for simulating deformation;

[0006] The lower part of the sand box is provided with an openable window, the temperature-pressing device is located below the sand box, and the nozzle of the temperature-pressing device can extend into the sand box through the window;

[0007] The simulated magma fluid in the temperature and pressure device enters into the sand box through the nozzle and the window, so as to simulate the transformation effect of magma intrusion and eruption on the stratum during the simulated structural deformation process.

[0008] Optionally, the temperature and pressure device may include: a fluid heater, a fluid pressurizer, a gas-liquid mixing tank and a nozzle;

[0009] The fluid heater and the fluid pressurizer are respectively connected to the gas-liquid mixing tank, and a first valve is provided between the fluid heater and the gas-liquid mixing tank;

[0010] The nozzle is connected above the gas-liquid mixing tank, and a second valve is provided on the nozzle;

[0011] The simulated magma fluid is heated in the fluid heater and then introduced into the gas-liquid mixing tank. The fluid pressurizer pressurizes the simulated magma fluid in the gas-liquid mixing tank so as to be guided into the interior of the sand box through the nozzle.

[0012] Optionally, the sand box is in a rectangular shape, and the power supply device is connected to opposite side panels of the sand box.

[0013] Optionally, the system may further include: a bracket assembly; the bracket assembly includes: a bracket panel and a frame body connected to the bracket panel;

[0014] The sand box and the power supply device are arranged above the support panel, and the temperature pressing device is located below the support panel.

[0015] Optionally, a hollow window matching the window position is provided on the bracket panel.

[0016] Optionally, the window is circular or strip-shaped.

[0017] In a second aspect, an embodiment of the present invention provides an application of an experimental system for simulating the transformation of strata by magma intrusion and eruption as described in the first aspect in structural physics simulation.

[0018] In a third aspect, an embodiment of the present invention provides an experimental method for simulating magma intrusion and eruption to transform strata, and the method is implemented based on the experimental system for simulating magma intrusion and eruption to transform strata described in the first aspect, and may include:

[0019] Obtain the stratigraphic sequence and structural characteristics of the study area and construct an initial structural model in the sand box;

[0020] Based on the magma analysis results of the study area, simulated magma fluids with different viscosities are configured in a temperature and pressure device and heated and pressurized;

[0021] Based on the different stages of tectonic deformation in the study area, a power supply device is used to provide the sand box with power for simulating deformation, and the simulated magma fluid is introduced into the sand box through the temperature and pressure device to simulate the transformation effect of magma intrusion and eruption on the formation during the simulated tectonic deformation process.

[0022] Optionally, the method may further include:

[0023] closing the second valve after the simulated magma fluid cools down;

[0024] The constructed model is sliced ​​and / or CT scanned to analyze the simulation experiment based on the slice results and / or CT scan results.

[0025] Optionally, the color of the simulated magma fluid can be adjusted according to the different periods of magma intrusion and eruption time in the study area.

[0026] The beneficial effects of the above technical solution provided in the embodiments of the present invention include at least:

[0027] An experimental system and method for simulating the transformation of strata by magma intrusion and eruption are provided in an embodiment of the present invention. The system can simulate the process of magma intrusion and eruption, and can also conduct research on magma intrusion, eruption and the transformation of pre-existing structures in the overlying crust (strata) during tectonic deformation, thereby improving the understanding of the transformation effect of magma activity on the overlying geological models that have not yet been deformed, are synchronously deformed, and have been deformed.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0029] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 A schematic diagram of the structure of an experimental system for simulating magma intrusion and eruption to transform strata provided in an embodiment of the present invention;

[0032] Figure 2 A flow chart of an experimental method for simulating magma intrusion and eruption to transform strata provided in an embodiment of the present invention;

[0033] Among them, 1-sand box; 2-power supply device; 3-temperature pressing device; 4-support assembly;

[0034] 11-side panel; 31-nozzle; 32-fluid heater; 33-fluid pressurizer; 34-gas-liquid mixing tank; 35-first valve; 36-second valve; 41-bracket panel; 42-frame. DETAILED DESCRIPTION

[0035] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Active plate boundaries and plate interiors are often accompanied by intense magmatic activity, and the magma intrusion process will strongly transform the plate boundaries and the original structural pattern inside. The inventors found in actual production and simulation that the existing sand box device can only simulate structural deformation, and cannot carry out research on magma intrusion, eruption, and the transformation of pre-existing structures in the overlying crust (strata) during structural deformation. In view of the above problems, the present invention is proposed to provide an experimental system and method for simulating the transformation of strata by magma intrusion and eruption, which overcomes the above problems or at least partially solves the above problems. That is, the present invention aims to study an experimental technical method and system that can simulate the intrusion, eruption and transformation of high-temperature and high-pressure magma during structural deformation (compression, tension and strike-slip environments).

[0039] The present invention provides an experimental system for simulating magma intrusion and eruption to transform the strata, referring to Figure 1As shown, the system may include: a sand box 1, a power supply device 2 and a temperature and pressure device 3; wherein the power supply device 2 is located on the side of the sand box 1 and is connected to the side plate 11 of the sand box 1 to provide the sand box 1 with power for simulating deformation; an openable and closable window (not shown in the figure) is provided at the lower part of the sand box 1, the temperature and pressure device 3 is located below the sand box 1, and the nozzle 31 of the temperature and pressure device 3 can extend into the sand box 1 through the window; the simulated magma fluid in the temperature and pressure device 3 enters the sand box 1 through the nozzle 31 and the window to simulate the transformation effect of magma intrusion and eruption on the stratum in the process of simulating tectonic deformation.

[0040] It should be noted that in the physical simulation of structural deformation, the material commonly used for laying the stratum inside the sand box in this embodiment is loose quartz sand, which is fractured by external stress in accordance with the rock fracture criterion in nature, and is used to simulate the structural deformation of real rocks underground in the upper crust. It should also be noted that the above-mentioned power supply device can set the structural model boundary conditions according to the geological conditions of the study area, and use the sandbox simulation experiment to carry out structural physical simulation under different stress fields (compression, tension, and slip).

[0041] In the embodiment of the present invention, the normal temperature simulated magma fluid placed in the temperature and pressure device reaches the boiling point under high temperature (high pressure) conditions, and the continuously boiling liquid and gas move along the faults or strata in the sandbox model to simulate the intrusion of magma. This system is organically combined with the normal temperature and pressure structural physical simulation experimental device and the high temperature and pressure heating device to observe the transformation effect of magma intrusion and eruption process on the overlying sedimentary model. The bottom of the above-mentioned sand box can be provided with multiple windows, and the shape of the windows can be circular or strip-shaped, so as to simulate the magma channel in reality, and the boiling simulated magma fluid enters the interior of the sand box from the above-mentioned windows.

[0042] The above-mentioned system provided by the embodiment of the present invention can simulate the process of magma intrusion and eruption, and can also carry out research on magma intrusion, eruption and the transformation of pre-existing structures in the overlying crust (stratum) during tectonic deformation, thereby improving the understanding of the transformation effect of magma activity on the overlying geological models that have not yet been deformed, synchronously deformed and deformed.

[0043] In an alternative embodiment, referring to Figure 1As shown, the temperature and pressure device 3 may include: a nozzle 31, a fluid heater 32, a fluid pressurizer 33 and a gas-liquid mixing tank 34; the fluid heater 32 and the fluid pressurizer 33 are respectively connected to the gas-liquid mixing tank 34, and a first valve 35 is provided between the fluid heater 32 and the gas-liquid mixing tank 34; the nozzle 31 is connected above the gas-liquid mixing tank 34, and a second valve 36 is provided on the nozzle 31; the simulated magma fluid is heated in the fluid heater 32 and then introduced into the gas-liquid mixing tank 34, and the fluid pressurizer 33 pressurizes the simulated magma fluid in the gas-liquid mixing tank 34 so as to be guided to the interior of the sand box 1 through the nozzle 31.

[0044] The specific structure of the temperature and pressure device provided in the embodiment of the present invention is based on the principle of high temperature and high pressure to form a set of heating and pressurizing devices with a hydrothermal upwelling channel and a control valve, which can realize the pre-treatment of simulated magma fluids with different boiling points and viscosities. It should be noted that in this embodiment, the fluid pressurizer and the gas-liquid mixing tank are both connected to a pressure gauge. When the gas and liquid are mixed, the pressure is different and the temperature will change accordingly. In this embodiment, in order to simulate the effects of different periods of magma intrusion and eruption on the transformation of the formation, simulated magma fluids of different colors and viscosities can be injected into the fluid heater to simulate different experimental results.

[0045] In a specific embodiment, referring to Figure 1 As shown, the sand box 1 is in a rectangular parallelepiped shape, and the power supply device 2 is connected to the side plates 11 opposite to the sand box 1. The rectangular sand box is convenient for applying force from one angle and observing the experimental results from one direction.

[0046] In another alternative embodiment, referring to Figure 1 As shown, the system may further include: a support assembly 4; the support assembly 4 may include: a support panel 41 and a frame 42 connected to the support panel 41; the sand box 1 and the power supply device 2 are arranged above the support panel 41, and the temperature pressing device 3 is located below the support panel 41. In a specific embodiment, a hollow window matching the window position is opened on the support panel.

[0047] In this embodiment, the bracket assembly facilitates installation and placement of the sand box, power supply device and temperature pressure device, and the hollow window facilitates extension of the nozzle into the sand box, which is easy to operate.

[0048] Based on the same inventive concept, an embodiment of the present invention also provides an application of the above-mentioned experimental system for simulating the transformation of strata by magma intrusion and eruption in structural physical simulation.

[0049] Based on the same inventive concept, an experimental method for simulating magma intrusion and eruption to transform the stratum is also provided in the embodiment of the present invention. The method is implemented based on the experimental system for simulating magma intrusion and eruption to transform the stratum, and the experimental system is described in detail. Figure 2 As shown, this may include:

[0050] Step S21, obtaining the stratigraphic sequence and structural characteristics of the study area, and constructing an initial structural model in the sand box.

[0051] Step S22: Based on the magma analysis results of the study area, simulated magma fluids of different viscosities are configured in the temperature and pressure device and heated and pressurized.

[0052] The color of the simulated magmatic fluid can be adjusted according to the different periods of magma intrusion and eruption time in the study area.

[0053] Step S23: Based on the tectonic deformation effects of different periods in the study area, a power supply device is used to provide the sand box with power for simulating deformation, the first valve is opened, and the simulated magma fluid is introduced into the sand box through a temperature and pressure device to simulate the transformation effect of magma intrusion and eruption on the formation during the simulated tectonic deformation process.

[0054] Step S24: After the simulated magma fluid cools down, close the second valve.

[0055] Step S25: Slice and / or CT scan the constructed model to analyze the simulation experiment based on the slicing results and / or CT scanning results.

[0056] Close the control valve, wait for the temperature to cool down, cut open the structural model, and analyze the magma intrusion, eruption, and adjustment and transformation of the overlying model based on the distribution and contamination of colored liquids in the geological model. Applying this method to complex structural areas during the stage of large-scale magma activity is instructive for studying the interaction between structural deformation and magmatic activity.

[0057] Obviously, various changes and modifications may be made to the present invention by those skilled in the art without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various changes and modifications may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. An experimental system for simulating magma intrusion and eruption to transform the strata, characterized in that: include: Sand box, power supply device and temperature pressing device; Wherein, the power supply device is located on the side of the sand box and connected to the side plate of the sand box to provide the sand box with power for simulating deformation; The lower part of the sand box is provided with an openable window, the temperature-pressing device is located below the sand box, and the nozzle of the temperature-pressing device can extend into the sand box through the window; The simulated magma fluid in the temperature and pressure device enters into the sand box through the nozzle and the window, so as to simulate the transformation effect of magma intrusion and eruption on the stratum during the simulated structural deformation process.

2. The system according to claim 1, characterized in that The temperature and pressure device comprises: a fluid heater, a fluid pressurizer, a gas-liquid mixing tank and a nozzle; The fluid heater and the fluid pressurizer are respectively connected to the gas-liquid mixing tank, and a first valve is provided between the fluid heater and the gas-liquid mixing tank; The nozzle is connected above the gas-liquid mixing tank, and a second valve is provided on the nozzle; The simulated magma fluid is heated in the fluid heater and then introduced into the gas-liquid mixing tank. The fluid pressurizer pressurizes the simulated magma fluid in the gas-liquid mixing tank so as to be guided into the interior of the sand box through the nozzle.

3. The system according to claim 1, characterized in that The sand box is in a rectangular parallelepiped shape, and the power supply device is connected to the side plates opposite to the sand box.

4. The system according to any one of claims 1 to 3, characterized in that: The system further comprises: a bracket assembly; the bracket assembly comprises: a bracket panel and a frame body connected to the bracket panel; The sand box and the power supply device are arranged above the support panel, and the temperature pressing device is located below the support panel.

5. The system according to claim 4, characterized in that The bracket panel is provided with a hollow window matching the position of the window.

6. The system according to any one of claims 1 to 3, characterized in that: The window is circular or strip-shaped.

7. Use of an experimental system for simulating magma intrusion and eruption to transform strata as claimed in any one of claims 1 to 6 in structural physical simulation.

8. An experimental method for simulating magma intrusion and eruption to transform the strata, characterized in that: The method is implemented based on the experimental system for simulating magma intrusion and eruption to transform the formation according to any one of claims 1 to 7, comprising: Obtain the stratigraphic sequence and structural characteristics of the study area and construct an initial structural model in the sand box; Based on the magma analysis results of the study area, simulated magma fluids with different viscosities are configured in a temperature and pressure device and heated and pressurized; Based on the different stages of tectonic deformation in the study area, a power supply device is used to provide the sand box with power for simulating deformation, and the simulated magma fluid is introduced into the sand box through the temperature and pressure device to simulate the transformation effect of magma intrusion and eruption on the formation during the simulated tectonic deformation process.

9. The method according to claim 8, characterized in that Also includes: closing the second valve after the simulated magma fluid cools down; The constructed model is sliced ​​and / or CT scanned to analyze the simulation experiment based on the slice results and / or CT scan results.

10. The method according to claim 8, characterized in that The color of the simulated magma fluid can be adjusted according to the different periods of magma intrusion and eruption time in the study area.

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