Interlayer interference simulation device in hydrate layer series multiphase gas layer combined development process

Abstract

The utility model discloses an interlayer interference simulation device in the multiphase gas layer combined development process of a hydrate layer system, which comprises a plurality of low-temperature high-pressure reaction kettles connected in series, the upstream of each low-temperature high-pressure reaction kettle is connected with a gas source and injection system, and the downstream of each low-temperature high-pressure reaction kettle is connected with a gas flow monitoring system through a drying system. A temperature detection system is arranged on the outer wall of the low-temperature and high-pressure reaction kettle, the upstream and downstream of the low-temperature and high-pressure reaction kettle are respectively connected with a pressure detection system and a valve assembly, and the gas flow monitoring system, the pressure detection system and the temperature detection system are respectively connected with a computer control system through a container; and a temperature sensor dot matrix is arranged in the low-temperature high-pressure reaction kettle. According to the utility model, fluid phase state combinations corresponding to different ground layer stacking relations in a hydrate-shallow gas system can be accurately simulated, a multi-gas combined development experiment is carried out based on different phase state combinations, and an interlayer interference rule in a commingling production process is explored.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas hydrate-shallow gas development, in particular to an interlayer interference simulation device in the process of joint development of multi-phase gas layers in a hydrate layer system. Background Art

[0002] Natural gas hydrates are widely present in shallow sediments on the ocean floor. This ice-like solid formed by the combination of methane and water occupies the pores and cracks of the seafloor sediments to form a dense cap layer, thus playing a good sealing role for the underlying shallow gas. A large number of studies have confirmed that the large-scale accumulation of hydrate cap layers and shallow gas accumulation often has a temporal and spatial correlation, and this symbiotic system has a higher commercial development value than a single shallow gas or natural gas hydrate layer.

[0003] However, the gas storage forms of hydrate strata are diverse, the fluid phase combinations are complex, and the interlayer interference is serious during the development process, which makes the research related to multi-gas production face many problems and challenges.

[0004] Therefore, there is an urgent need for an interlayer interference simulation device during the joint development of multiphase gas layers in hydrate formations. Utility Model Content

[0005] The utility model aims to provide an interlayer interference simulation device in the process of joint development of multiphase gas layers in a hydrate layer system, so as to solve the problem of how to explore the interlayer interference problem in the development process of multiple different fluid phase combination layers in the above background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an interlayer interference simulation device in the process of joint development of multiphase gas layers in a hydrate layer system, comprising a plurality of low-temperature and high-pressure reactors, a gas source and injection system, a drying system, a gas flow monitoring system, a pressure detection system, a temperature detection system, a container, a computer control system and a valve assembly, wherein the plurality of low-temperature and high-pressure reactors are connected in series, the upstream of each low-temperature and high-pressure reactor is connected to a gas source and injection system, the downstream of each low-temperature and high-pressure reactor is respectively connected to the gas flow monitoring system through the drying system, the outer wall of the low-temperature and high-pressure reactor is provided with the temperature detection system, the upstream and downstream of the low-temperature and high-pressure reactor are respectively connected to the pressure detection system and the valve assembly, the gas flow monitoring system, the pressure detection system and the temperature detection system are respectively connected to the computer control system through the container, and a temperature sensor matrix is ​​provided inside the low-temperature and high-pressure reactor.

[0008] The interlayer interference simulation device during the joint development of multiphase gas layers in the hydrate layer system, preferably, the low-temperature and high-pressure reactor comprises a first low-temperature and high-pressure reactor, a second low-temperature and high-pressure reactor, a third low-temperature and high-pressure reactor, a first temperature-controlled jacket, a second temperature-controlled jacket, a third temperature-controlled jacket and a cold circulation system, the first low-temperature and high-pressure reactor, the second low-temperature and high-pressure reactor and the third low-temperature and high-pressure reactor are connected in series in sequence, the first low-temperature and high-pressure reactor is provided with the first temperature-controlled jacket on the outside, the second low-temperature and high-pressure reactor is provided with the second temperature-controlled jacket on the outside, the third low-temperature and high-pressure reactor is provided with the third temperature-controlled jacket on the outside, the first temperature-controlled jacket, the second temperature-controlled jacket and the third temperature-controlled jacket are respectively provided with the cold circulation system, and the first temperature-controlled jacket, the second temperature-controlled jacket and the third temperature-controlled jacket are provided with the temperature detection system.

[0009] The interlayer interference simulation device during the joint development of multi-phase gas layers in the hydrate layer system, preferably, the temperature detection system includes a first temperature sensor, a second temperature sensor and a third temperature sensor, the first temperature sensor is arranged in the first temperature control jacket, the second temperature sensor is arranged in the second temperature control jacket, the third temperature sensor is arranged in the third temperature control jacket, the first temperature sensor, the second temperature sensor and the third temperature sensor are respectively connected to the computer control system through the container.

[0010] The interlayer interference simulation device during the joint development of multiphase gas layers in the hydrate layer system, preferably, the pressure detection system includes a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor and a fifth pressure sensor, the first pressure sensor is provided upstream of the first low-temperature and high-pressure reactor, the second pressure sensor is provided downstream of the first low-temperature and high-pressure reactor, the third pressure sensor is provided upstream of the second low-temperature and high-pressure reactor, the fourth pressure sensor is provided downstream of the second low-temperature and high-pressure reactor, and the fifth pressure sensor is provided upstream of the third low-temperature and high-pressure reactor.

[0011] The interlayer interference simulation device during the joint development of multiphase gas layers in the hydrate layer system, preferably, the gas source and injection system includes a first gas source and injection system, a second gas source and injection system and a third gas source and injection system, the first gas source and injection system is connected to the first low-temperature and high-pressure reactor, the second gas source and injection system is connected to the second low-temperature and high-pressure reactor, and the third gas source and injection system is connected to the third low-temperature and high-pressure reactor.

[0012] The interlayer interference simulation device during the joint development of multiphase gas layers in a hydrate layer system, preferably, the drying system includes a first dryer, a second dryer, a third dryer, a first electronic scale, a second electronic scale and a third electronic scale, the first dryer is arranged on the first electronic scale, and the first dryer is arranged downstream of the first low-temperature and high-pressure reactor, the second dryer is arranged on the second electronic scale, and the second dryer is arranged downstream of the second low-temperature and high-pressure reactor, the third dryer is arranged on the third electronic scale, and the third dryer is arranged downstream of the third low-temperature and high-pressure reactor, the first dryer, the second dryer and the third dryer are respectively connected to the gas flow monitoring system.

[0013] The interlayer interference simulation device during the joint development of multi-phase gas layers in the hydrate layer system, preferably, the gas flow monitoring system includes a first gas flow meter, a second gas flow meter and a third gas flow meter, the first gas flow meter is connected to the first dryer, the second dryer is connected to the second gas flow meter, the third gas flow meter is connected to the third dryer, the first gas flow meter, the second gas flow meter and the third gas flow meter are respectively connected to the computer control system through the container.

[0014] In the interlayer interference simulation device during the joint development of multiphase gas layers in the hydrate layer system, preferably, the valve assembly includes a three-way valve assembly, a four-way valve assembly and a stop valve assembly, the three-way valve assembly is provided upstream of the first low-temperature and high-pressure reactor and downstream of the third low-temperature and high-pressure reactor, the first low-temperature and high-pressure reactor, the second low-temperature and high-pressure reactor and the third low-temperature and high-pressure reactor are connected through the four-way valve assembly, and the stop valve assemblies are respectively provided on the pipelines connected to the three-way valve assembly and the four-way valve assembly.

[0015] The utility model adopts the above technical solution, which has the following advantages:

[0016] This application can accurately simulate the fluid phase combinations corresponding to different stratum superposition relationships in the hydrate-shallow gas system, carry out multi-gas joint development experiments based on different phase combinations, and explore the interlayer interference laws of the combined production process.

[0017] The present application is used to simulate the fluid phase combination of various stratigraphic superposition systems of hydrate layers (including natural gas hydrate layers, shallow gas layers and interlayers, etc.) and to conduct interlayer interference experimental research in the multi-gas joint development process based on different phase combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the principle of the experimental device for simulating the development of multiphase gas layers in hydrate layers of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the temperature sensor array in the low-temperature and high-pressure reactor.

[0020] Reference numerals in the figures:

[0021] 11. First gas source and injection system, 12. Second gas source and injection system, 13. Third gas source and injection system;

[0022] 21. a first low-temperature and high-pressure reactor, 22. a second low-temperature and high-pressure reactor, 23. a third low-temperature and high-pressure reactor;

[0023] 31. a first temperature-controlling jacket, 32. a second temperature-controlling jacket, 33. a third temperature-controlling jacket;

[0024] 41, a first dryer, 42, a second dryer, 43, a third dryer;

[0025] 51. a first gas flow meter, 52. a second gas flow meter, 53. a third gas flow meter;

[0026] 6. Container; 7. Computer control system;

[0027] 81, first stop valve, 82, second stop valve, 83, third stop valve, 84, fourth stop valve,

[0028] 85, the fifth stop valve, 86, the sixth stop valve, 87, the seventh stop valve, 88, the eighth stop valve,

[0029] 89, the ninth stop valve, 810, the tenth stop valve, 811, the eleventh stop valve;

[0030] 91, first three-way valve, 92, second three-way valve;

[0031] 101, a first four-way valve, 102, a second four-way valve, 103, a third four-way valve, 104, a fourth four-way valve;

[0032] 111, a first pressure sensor, 112, a second pressure sensor, 113, a third pressure sensor,

[0033] 114, a fourth pressure sensor, 115, a fifth pressure sensor;

[0034] 121, a first temperature sensor, 122, a second temperature sensor, 123, a third temperature sensor;

[0035] 13. Temperature sensor in low-temperature and high-pressure reactor. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upstream", "downstream", etc. are based on the directions 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 system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the use of terms such as "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", "tenth" and "eleventh" to define components is only for the convenience of distinguishing the above components. If not otherwise stated, the above terms have no special meaning and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "provided with" 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 an indirect connection 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.

[0039] The utility model provides a device for simulating interlayer interference in the process of joint development of multiphase gas layers in a hydrate layer system. The utility model includes multiple low-temperature and high-pressure reactors, gas sources and injection systems, drying systems, gas flow monitoring systems, pressure detection systems, temperature detection systems, containers, computer control systems and valve components. Multiple low-temperature and high-pressure reactors are connected in series, and the upstream of each low-temperature and high-pressure reactor is connected to a gas source and injection system, and the downstream of each low-temperature and high-pressure reactor is respectively connected to the gas flow monitoring system through the drying system. The outer wall of the low-temperature and high-pressure reactor is provided with the temperature detection system, and the upstream and downstream of the low-temperature and high-pressure reactor are respectively connected to the pressure detection system and the valve component. The gas flow monitoring system, the pressure detection system and the temperature detection system are respectively connected to the computer control system through the container, and the interior of the low-temperature and high-pressure reactor is provided with a temperature sensor matrix. The utility model can accurately simulate the fluid phase combination corresponding to the superposition relationship of different strata in the hydrate-shallow gas system, carry out multi-gas joint development experiments based on different phase combinations, and explore the interlayer interference law of the combined production process.

[0040] Below, in conjunction with the accompanying drawings, a device for simulating interlayer interference during the joint development of multiphase gas layers in a hydrate layer system provided by an embodiment of the utility model is described in detail.

[0041] Reference Figure 1 and Figure 2As shown, a device for simulating interlayer interference in the joint development of multiphase gas layers in a hydrate layer system comprises a plurality of low-temperature and high-pressure reactors, a gas source and injection system, a drying system, a gas flow monitoring system, a pressure detection system, a temperature detection system, a container 6, a computer control system 7 and a valve assembly. The plurality of low-temperature and high-pressure reactors are connected in series, wherein the number of low-temperature and high-pressure reactors can be increased or decreased according to the conditions of the simulated formations, the upstream of each of the low-temperature and high-pressure reactors is connected to a gas source and injection system, the downstream of each of the low-temperature and high-pressure reactors is connected to the gas flow monitoring system through the drying system, the outer wall of the low-temperature and high-pressure reactor is provided with the temperature detection system, and the temperature detection system is used to monitor the internal environment of each reactor. The pressure detection system and the valve assembly are connected to the upstream and downstream of the low-temperature and high-pressure reactor respectively. The pressure detection system monitors the pressure and pressure gradient in each reactor. The gas flow monitoring system, the pressure detection system and the temperature detection system are connected to the computer control system 7 through the container 6 respectively, and also include a plurality of temperature sensors 13 in the low-temperature and high-pressure reactor. The temperature sensors 13 in the low-temperature and high-pressure reactor form a temperature sensor lattice inside the low-temperature and high-pressure reactor to measure the spatial distribution of the sediment temperature in the low-temperature and high-pressure reactor. In the multi-gas combined production simulation experiment, the temperature lattice system can be used to restore the local temperature changes caused by interlayer interference, so as to analyze the local decomposition characteristics of hydrates and the law of interlayer interference.

[0042] The low-temperature and high-pressure reactor comprises a first low-temperature and high-pressure reactor 21, a second low-temperature and high-pressure reactor 22, a third low-temperature and high-pressure reactor 23, a first temperature-control jacket 31, a second temperature-control jacket 32, a third temperature-control jacket 33 and a cold circulation system. The first low-temperature and high-pressure reactor 21, the second low-temperature and high-pressure reactor 22 and the third low-temperature and high-pressure reactor 23 are connected in series in sequence. The first low-temperature and high-pressure reactor 21 is provided with a first temperature-control jacket 31 on the outside, the second low-temperature and high-pressure reactor 22 is provided with a second temperature-control jacket 32 ​​on the outside, and the third low-temperature and high-pressure reactor 23 is provided with a third temperature-control jacket 33 on the outside. The first temperature-control jacket 31, the second temperature-control jacket 32 ​​and the third temperature-control jacket 33 are respectively provided with the cold circulation system, and the first temperature-control jacket 31, the second temperature-control jacket 32 ​​and the third temperature-control jacket 33 are provided with the temperature detection system.

[0043] The first low temperature and high pressure reactor 21, the second low temperature and high pressure reactor 22 and the third low temperature and high pressure reactor 23 can withstand a high pressure of 30 MPa to provide the temperature and pressure conditions required for the stable existence of different phases of fluids such as hydrate-gas-water three-phase, gas-water two-phase, and pure water phase. In addition, the first low temperature and high pressure reactor 21, the second low temperature and high pressure reactor 22 and the third low temperature and high pressure reactor 23 have independent temperature control functions for different reactors; the first low temperature and high pressure reactor 21, the second low temperature and high pressure reactor 22 and the third low temperature and high pressure reactor 23 are separately equipped with the cold circulation system for pumping coolant into the first temperature control jacket 31, the second temperature control jacket 32, and the third temperature control jacket 33, which, on the one hand, provide different reactors with the required temperature for different fluid phases, and on the other hand, can flexibly control the temperature to ensure the stability of the phase combination of the fluid in the reactor during the experiment.

[0044] The first low-temperature and high-pressure reactor 21, the second low-temperature and high-pressure reactor 22 and the third low-temperature and high-pressure reactor 23 are connected by pipelines and can be freely disassembled and assembled when the stop valve group is closed to simulate the stacking relationship of reservoirs containing fluids in different phases.

[0045] Each low-temperature and high-pressure reactor is independent and can adjust the pressure individually to simulate the initial conditions of the formation according to the experimental requirements. In addition, the pressures of each low-temperature and high-pressure reactor can be connected by opening any one or several stop valves in the stop valve group to simulate the multi-gas combined production and development process.

[0046] Among them, the temperature detection system includes a first temperature sensor 121, a second temperature sensor 122 and a third temperature sensor 123. The first temperature sensor 121 is arranged in the first temperature control jacket 31, the second temperature sensor 122 is arranged in the second temperature control jacket 32, and the third temperature sensor 123 is arranged in the third temperature control jacket 33. The first temperature sensor 121, the second temperature sensor 122 and the third temperature sensor 123 are respectively connected to the computer control system 7 through the container 6.

[0047] Among them, the gas source and injection system includes a first gas source and injection system 11, a second gas source and injection system 12 and a third gas source and injection system 13. The first gas source and injection system 11 is connected to the first low-temperature and high-pressure reactor 21, the second gas source and injection system 12 is connected to the second low-temperature and high-pressure reactor 22, and the third gas source and injection system 13 is connected to the third low-temperature and high-pressure reactor 23.

[0048] The drying system includes a first dryer 41, a second dryer 42, a third dryer 43, a first electronic scale, a second electronic scale and a third electronic scale. The first dryer 41 is arranged on the first electronic scale, and the first dryer 41 is arranged downstream of the first low-temperature and high-pressure reactor 21. The second dryer 42 is arranged on the second electronic scale, and the second dryer 42 is arranged downstream of the second low-temperature and high-pressure reactor 22. The third dryer 43 is arranged on the third electronic scale, and the third dryer 43 is arranged downstream of the third low-temperature and high-pressure reactor 23. The first dryer 41, the second dryer 42 and the third dryer 43 are respectively connected to the gas flow monitoring system.

[0049] The drying system is connected to the downstream of the low-temperature and high-pressure reactor to protect the gas flow meter. The drying system is equipped with an electronic scale, which can calculate the change in the saturation of the water phase in the low-temperature and high-pressure reactor by measuring the mass change during the experiment. A gas drying device is connected to the downstream of the low-temperature and high-pressure reactor to protect the gas flow meter. The drying device is equipped with an electronic scale, which can calculate the change in the saturation of the water phase in the low-temperature and high-pressure reactor by measuring the mass change during the experiment, so as to measure the total gas volume obtained in the development simulation experiment, and to estimate the gas production and gas production proportion of different reactors (i.e., different layer systems).

[0050] Wherein, the gas flow monitoring system includes a first gas flow meter 51, a second gas flow meter 52 and a third gas flow meter 53, the first gas flow meter 51 is connected to the first dryer 41, the second dryer 42 is connected to the second gas flow meter 52, the third gas flow meter 53 is connected to the third dryer 43, and the first gas flow meter 51, the second gas flow meter 52 and the third gas flow meter 53 are respectively connected to the computer control system 7 through the container 6.

[0051] Among them, the valve assembly includes a three-way valve assembly, a four-way valve assembly and a stop valve assembly. The three-way valve assembly is provided upstream of the first low-temperature and high-pressure reactor 21 and downstream of the third low-temperature and high-pressure reactor 23. The first low-temperature and high-pressure reactor 21, the second low-temperature and high-pressure reactor 22, and the third low-temperature and high-pressure reactor 23 are connected through the four-way valve assembly, and the stop valve assemblies are respectively provided on the pipelines connected to the three-way valve assembly and the four-way valve assembly.

[0052] Among them, the pressure detection system includes a first pressure sensor 111, a second pressure sensor 112, a third pressure sensor 113, a fourth pressure sensor 114 and a fifth pressure sensor 115. The first pressure sensor 111 is provided upstream of the first low-temperature and high-pressure reactor 21, the second pressure sensor 112 is provided downstream of the first low-temperature and high-pressure reactor 21, the third pressure sensor 113 is provided upstream of the second low-temperature and high-pressure reactor 22, the fourth pressure sensor 114 is provided downstream of the second low-temperature and high-pressure reactor 22, and the fifth pressure sensor 115 is provided upstream of the third low-temperature and high-pressure reactor 23.

[0053] The first pressure sensor 111 , the second pressure sensor 112 , the third pressure sensor 113 , the fourth pressure sensor 114 and the fifth pressure sensor 115 are connected to the computer control system 7 through the container 6 , respectively.

[0054] Among them, the three-way valve assembly includes a first three-way valve 91 and a second three-way valve 92; the four-way valve assembly includes a first four-way valve 101, a second four-way valve 102, a third four-way valve 103 and a fourth four-way valve 104; the stop valve assembly includes a first stop valve 81, a second stop valve 82, a third stop valve 83, a fourth stop valve 84, a fifth stop valve 85, a sixth stop valve 86, a seventh stop valve 87, an eighth stop valve 88, a ninth stop valve 89, a tenth stop valve 810, and an eleventh stop valve 811.

[0055] The upstream of the first low-temperature and high-pressure reactor 21 is connected to the first gas source and the injection system 11 through the first three-way valve 91, and a first stop valve 81 is provided on the connecting pipeline between the first low-temperature and high-pressure reactor 21 and the first gas source and the injection system 11. The first three-way valve 91 is also connected to the first pressure sensor 111;

[0056] The downstream of the first low-temperature and high-pressure reactor 21 is connected to the upstream of the second low-temperature and high-pressure reactor 21 through the first four-way valve 101 and the second four-way valve 102, wherein the first four-way valve 101 is also connected to the second pressure sensor 112 and the first dryer 41, respectively, and a second stop valve 82 is provided on the connecting pipeline between the first four-way valve 101 and the first dryer 41, the second four-way valve 102 is also connected to the third pressure sensor 113 and the second gas source and injection system 12, respectively, and a fourth stop valve 84 is provided on the connecting pipeline between the second four-way valve 102 and the second gas source and injection system 12, a third stop valve 83 is provided on the pipeline connecting the first four-way valve 101 and the second four-way valve 102, and a fifth stop valve 85 is provided on the connecting pipeline between the second four-way valve 102 and the second low-temperature and high-pressure reactor 22;

[0057] The downstream of the second low-temperature and high-pressure reactor 21 is connected to the upstream of the third low-temperature and high-pressure reactor 23 through the third four-way valve 103 and the fourth four-way valve 104, wherein the third four-way valve 103 is also connected to the fourth pressure sensor 114 and the second dryer 42, and a sixth stop valve 86 is provided on the connecting pipeline between the third four-way valve 103 and the second dryer 42, the fourth four-way valve 104 is also connected to the fifth pressure sensor 115 and the third gas source and injection system 13, and an eighth stop valve 88 is provided on the connecting pipeline between the fourth four-way valve 104 and the third gas source and injection system 13, a seventh stop valve 87 is provided on the pipeline connecting the third four-way valve 103 and the fourth four-way valve 104, and a ninth stop valve 89 is provided on the pipeline connecting the fourth four-way valve 104 and the third low-temperature and high-pressure reactor 23;

[0058] The downstream of the third low-temperature and high-pressure reactor 23 is connected to the third dryer 43 through the first connecting port and the second connecting port of the second three-way valve 91. The pipeline connecting the second three-way valve 91 and the third dryer 43 is also provided with a tenth stop valve 810, and the connecting pipeline of the third connecting port of the second three-way valve 91 is provided with an eleventh stop valve 811.

[0059] Taking the synthetic hydrate layer and shallow gas superposition system and mining simulation as an example, the container 6 and the computer control system 7 are turned on to collect and record data. Quantitative sediments and distilled water are filled into the first low-temperature and high-pressure reactor 21 and the second low-temperature and high-pressure reactor 22, and sediments are filled into the third low-temperature and high-pressure reactor 23. The second gas source and the injection system 12 are replaced with a hand pump and connected to the pipeline. The second stop valve 82, the third stop valve 83, the sixth stop valve 86, the seventh stop valve 87, the tenth stop valve 810 and the eleventh stop valve 811 are kept closed, and the first stop valve 81, the fourth stop valve 84, the fifth stop valve 85, the eighth stop valve 88, and the ninth stop valve 89 are opened. The first gas source and the injection system 11 are used to fill the first low-temperature and high-pressure reactor 21 with gas to reach the hydrate synthesis pressure, and at the same time, the refrigeration system of the first temperature control jacket 31 is turned on to cool the first low-temperature and high-pressure reactor 21 to the hydrate synthesis temperature, and the temperature change is monitored by the first temperature sensor 121 and the temperature dot matrix. Use a hand pump to pressurize the second low-temperature and high-pressure reactor 22 to be consistent with the pressure of the upper and lower reactors. Fill the third low-temperature and high-pressure reactor 23 with gas through the third gas source and injection system 13 until the gas pressure in the first low-temperature and high-pressure reactor 21 is reached. The refrigeration system of the third temperature control jacket 33 is not turned on to keep the temperature of the third low-temperature and high-pressure reactor 23 higher than the hydrate synthesis temperature under this pressure. The temperature change is monitored by the third temperature sensor 123 and the temperature dot matrix. Continue to replenish the pressure until the temperature and pressure of the three reactors are stable, and the synthesis stage ends. Simulate the extraction process of the underlying gas layer to observe the temperature and pressure changes of the upper hydrate layer and analyze the interlayer interference effect. Open the tenth stop valve 810 to reduce the pressure in the third low-temperature and high-pressure reactor 23, and observe the temperature and pressure changes in the flowmeter and the three reactors. After the pressure reduction is completed, the first low-temperature and high-pressure reactor 21, the second low-temperature and high-pressure reactor 22, the third low-temperature and high-pressure reactor 23 and the third dryer 43 are weighed to calculate the material changes.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An interlayer interference simulation device for the joint development of multiphase gas layers in hydrate layers, characterized in that: The invention comprises a plurality of low-temperature and high-pressure reactors, a gas source and injection system, a drying system, a gas flow monitoring system, a pressure detection system, a temperature detection system, a container, a computer control system and a valve assembly. The plurality of low-temperature and high-pressure reactors are connected in series, the upstream of each low-temperature and high-pressure reactor is connected to a gas source and injection system, the downstream of each low-temperature and high-pressure reactor is connected to the gas flow monitoring system through the drying system, the outer wall of the low-temperature and high-pressure reactor is provided with the temperature detection system, the upstream and downstream of the low-temperature and high-pressure reactor are respectively connected to the pressure detection system and the valve assembly, the gas flow monitoring system, the pressure detection system and the temperature detection system are respectively connected to the computer control system through the container, and a temperature sensor matrix is ​​provided inside the low-temperature and high-pressure reactor.

2. The interlayer interference simulation device in the process of joint development of multiphase gas layers in hydrate layers according to claim 1 is characterized in that: The low-temperature and high-pressure reactor comprises a first low-temperature and high-pressure reactor, a second low-temperature and high-pressure reactor, a third low-temperature and high-pressure reactor, a first temperature-control jacket, a second temperature-control jacket, a third temperature-control jacket and a cold circulation system. The first low-temperature and high-pressure reactor, the second low-temperature and high-pressure reactor and the third low-temperature and high-pressure reactor are connected in series in sequence. The first low-temperature and high-pressure reactor is provided with the first temperature-control jacket outside, the second low-temperature and high-pressure reactor is provided with the second temperature-control jacket outside, the third low-temperature and high-pressure reactor is provided with the third temperature-control jacket outside, the first temperature-control jacket, the second temperature-control jacket and the third temperature-control jacket are respectively provided with the cold circulation system, and the first temperature-control jacket, the second temperature-control jacket and the third temperature-control jacket are provided with the temperature detection system.

3. The interlayer interference simulation device in the process of joint development of multiphase gas layers in hydrate layers according to claim 2 is characterized in that: The temperature detection system includes a first temperature sensor, a second temperature sensor and a third temperature sensor. The first temperature sensor is arranged in the first temperature control jacket, the second temperature sensor is arranged in the second temperature control jacket, and the third temperature sensor is arranged in the third temperature control jacket. The first temperature sensor, the second temperature sensor and the third temperature sensor are respectively connected to the computer control system through the container.

4. The interlayer interference simulation device in the process of joint development of multiphase gas layers in hydrate layers according to claim 3 is characterized in that: The pressure detection system includes a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor and a fifth pressure sensor. The first pressure sensor is provided upstream of the first low-temperature and high-pressure reactor, the second pressure sensor is provided downstream of the first low-temperature and high-pressure reactor, the third pressure sensor is provided upstream of the second low-temperature and high-pressure reactor, the fourth pressure sensor is provided downstream of the second low-temperature and high-pressure reactor, and the fifth pressure sensor is provided upstream of the third low-temperature and high-pressure reactor.

5. The interlayer interference simulation device in the process of joint development of multiphase gas layers in hydrate layers according to claim 4 is characterized in that: The gas source and injection system includes a first gas source and injection system, a second gas source and injection system, and a third gas source and injection system. The first gas source and injection system is connected to the first low-temperature and high-pressure reactor, the second gas source and injection system is connected to the second low-temperature and high-pressure reactor, and the third gas source and injection system is connected to the third low-temperature and high-pressure reactor.

6. The interlayer interference simulation device in the process of joint development of multiphase gas layers in hydrate layers according to claim 5 is characterized in that: The drying system includes a first dryer, a second dryer, a third dryer, a first electronic scale, a second electronic scale and a third electronic scale. The first dryer is arranged on the first electronic scale and is arranged downstream of the first low-temperature and high-pressure reactor. The second dryer is arranged on the second electronic scale and is arranged downstream of the second low-temperature and high-pressure reactor. The third dryer is arranged on the third electronic scale and is arranged downstream of the third low-temperature and high-pressure reactor. The first dryer, the second dryer and the third dryer are respectively connected to the gas flow monitoring system.

7. The interlayer interference simulation device in the process of joint development of multiphase gas layers in hydrate layers according to claim 6 is characterized in that: The gas flow monitoring system includes a first gas flow meter, a second gas flow meter and a third gas flow meter, the first gas flow meter is connected to the first dryer, the second dryer is connected to the second gas flow meter, the third gas flow meter is connected to the third dryer, and the first gas flow meter, the second gas flow meter and the third gas flow meter are respectively connected to the computer control system through the container.

8. The interlayer interference simulation device in the process of joint development of multi-phase gas layers in hydrate layers according to claim 7 is characterized in that: The valve assembly includes a three-way valve assembly, a four-way valve assembly and a stop valve assembly. The three-way valve assembly is provided upstream of the first low-temperature and high-pressure reactor and downstream of the third low-temperature and high-pressure reactor. The first low-temperature and high-pressure reactor, the second low-temperature and high-pressure reactor and the third low-temperature and high-pressure reactor are connected through the four-way valve assembly. The stop valve assemblies are respectively provided on the pipelines connected to the three-way valve assembly and the four-way valve assembly.

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