A multi-layer collaborative development indoor simulation device suitable for inclined gas storage

Abstract

The present invention relates to the field of natural gas technology, and specifically discloses a multi-layer collaborative development indoor simulation device suitable for an inclined gas storage, comprising a first long core holder, a second long core holder, a third long core holder, a confining pressure assembly, an injection assembly, an outlet assembly, an inlet back pressure assembly, an outlet back pressure assembly, an inlet injection fluid assembly, and an outlet injection fluid assembly. The device has an inclination function and can connect long cores with multiple porosity and permeability conditions in parallel, so as to simulate different injection and production cycles of the gas storage, simulate different fluid injections, and measure the effects of different injection and production methods and different injection media on the gas storage.

Description

Technical Field

[0001] The present invention relates to the field of natural gas technology, and in particular to a multi-layer collaborative development indoor simulation device suitable for an inclined gas storage reservoir. Background Art

[0002] At present, with the continuous expansion of domestic natural gas usage and application scope, the demand for natural gas shows an increasing trend. Natural gas cannot be mined as needed, and the use of natural gas has a rule that demand is high in winter and low in summer. Now, gas storage is used to adjust the excess natural gas production in summer to the shortage in winter.

[0003] However, in the existing technology, the gas storage reservoir has a vague understanding of the underground gas storage status, and the evaluation of the gas storage capacity of different reservoirs at different stages is not clear enough. It is impossible to accurately characterize the gas injection volume of the gas storage reservoir at different stages. There is a lack of injection and production measures for gas storage reservoirs at different inclination angles, and the impact of production on the operating capacity of the gas storage reservoir. It is impossible to accurately study the impact of reservoirs with different porosity and permeability on the gas storage capacity of the gas storage reservoir. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-layer collaborative development indoor simulation device suitable for inclined gas storage reservoirs, aiming to solve the technical problems that the gas storage reservoirs in the prior art are not clear about the underground gas storage status, the evaluation of the gas storage capacity of different reservoirs at different stages is not clear enough, the gas injection volume of the gas storage reservoir at different stages cannot be accurately characterized, there is a lack of injection and production measures for gas storage reservoirs at different inclinations, the impact of production on the operating capacity of the gas storage reservoir, and the inability to accurately study the impact of reservoirs with different porosity and permeability on the gas storage capacity of the gas storage reservoir.

[0005] To achieve the above-mentioned purpose, the present invention adopts a multi-layer collaborative development indoor simulation device suitable for an inclined gas storage, comprising a first long core clamp, a second long core clamp, a third long core clamp, a confining pressure assembly, an injection assembly, an outlet assembly, an inlet back pressure assembly, an outlet back pressure assembly, an inlet injection fluid assembly and an outlet injection fluid assembly, the confining pressure assembly being connected to the first long core clamp, the second long core clamp and the third long core clamp respectively, the injection assembly being connected to one end of the first long core clamp, the second long core clamp and the third long core clamp, the outlet assembly being connected to one end of the first long core clamp, the second long core clamp and the third long core clamp away from the injection assembly, the inlet back pressure assembly being connected to the injection assembly, the inlet injection fluid assembly being connected to the injection assembly, the outlet back pressure assembly being connected to the outlet assembly, and the outlet injection fluid assembly being connected to the outlet assembly.

[0006] Among them, the confining pressure assembly includes a first confining pressure control valve, a second confining pressure control valve, a third confining pressure control valve, a fourth confining pressure control valve, a confining pressure gauge and a confining pressure pump. The first confining pressure control valve is connected to the third long core clamp, the second confining pressure control valve is connected to the second long core clamp, the third confining pressure control valve is connected to the first long core clamp, and the first confining pressure control valve, the second confining pressure control valve and the third confining pressure control valve are connected to the confining pressure pump respectively, and the confining pressure gauge and the fourth confining pressure control valve are arranged between the third confining pressure control valve and the confining pressure pump from left to right.

[0007] Wherein, the injection assembly includes a first inlet pressure gauge, a second inlet pressure gauge, a third inlet pressure gauge, a fourth valve, a fifth valve, a sixth valve, a clamp inlet back pressure valve, a first inlet liquid meter, a second inlet liquid meter, a third inlet liquid meter, a first inlet gas flow meter, a second inlet gas flow meter and a third inlet gas flow meter, the two ends of the first inlet pressure gauge are respectively connected to the first long core clamp and the clamp inlet back pressure valve, the two ends of the second inlet pressure gauge are respectively connected to the second long core clamp and the clamp inlet back pressure valve, the two ends of the third inlet pressure gauge are respectively connected to the third long core clamp and the clamp inlet back pressure valve The fourth valve is arranged between the first inlet pressure gauge and the clamp inlet back pressure valve, the fifth valve is arranged between the second inlet pressure gauge and the clamp inlet back pressure valve, the sixth valve is arranged between the third inlet pressure gauge and the clamp inlet back pressure valve, the first inlet liquid meter, the second inlet liquid meter and the third inlet liquid meter are respectively arranged at one end of the clamp inlet back pressure valve, the first inlet gas flow meter is adapted to the first inlet liquid meter, the second inlet gas flow meter is adapted to the second inlet liquid meter, and the third inlet gas flow meter is adapted to the third inlet liquid meter.

[0008] Wherein, the outlet assembly includes a first outlet pressure gauge, a second outlet pressure gauge, a third outlet pressure gauge, a first valve, a second valve, a third valve, a clamp outlet back pressure valve, a first outlet liquid meter, a second outlet liquid meter, a third outlet liquid meter, a first outlet gas flow meter, a second outlet gas flow meter and a third outlet gas flow meter, the two ends of the first outlet pressure gauge are respectively connected to the first long core clamp and the clamp outlet back pressure valve, the two ends of the second outlet pressure gauge are respectively connected to the second long core clamp and the clamp outlet back pressure valve, the two ends of the third outlet pressure gauge are respectively connected to the third long core clamp and the clamp outlet back pressure valve The first valve is arranged between the first outlet pressure gauge and the clamp outlet back pressure valve, the second valve is arranged between the second outlet pressure gauge and the clamp outlet back pressure valve, the third valve is arranged between the third outlet pressure gauge and the clamp outlet back pressure valve, the first outlet liquid meter, the second outlet liquid meter and the third outlet liquid meter are respectively arranged at one end of the clamp outlet back pressure valve, the first outlet gas flow meter is adapted to the first outlet liquid meter, the second outlet gas flow meter is adapted to the second outlet liquid meter, and the third outlet gas flow meter is adapted to the third outlet liquid meter.

[0009] Wherein, the inlet back pressure assembly includes an inlet back pressure gas cylinder, a fifteenth valve, an inlet back pressure pressure gauge, a sixteenth valve and an inlet back pressure pump, the inlet back pressure pressure gauge is connected to the clamp inlet back pressure valve, the fifteenth valve is connected to the inlet back pressure pressure gauge, the inlet back pressure gas cylinder is connected to the fifteenth valve, the sixteenth valve is connected to the inlet back pressure gas cylinder, and the inlet back pressure pump is connected to the sixteenth valve.

[0010] Wherein, the outlet back-pressure assembly includes an outlet back-pressure gas cylinder, a thirteenth valve, an outlet back-pressure pressure gauge, a fourteenth valve and an outlet back-pressure pump, the outlet back-pressure pressure gauge is connected to the outlet back-pressure valve of the clamper, the thirteenth valve is connected to the outlet back-pressure pressure gauge, the outlet back-pressure gas cylinder is connected to the thirteenth valve, the fourteenth valve is connected to the outlet back-pressure gas cylinder, and the outlet back-pressure pump is connected to the fourteenth valve.

[0011] Wherein, the inlet injection fluid component includes a tenth valve, an eleventh valve, a twelfth valve, a second injection pressure gauge, a nineteenth valve, a second injection fluid intermediate container, a twentieth valve and a second injection pressure pump, the tenth valve is arranged between the first inlet pressure gauge and the fourth valve, the eleventh valve is arranged between the second inlet pressure gauge and the fifth valve, the twelfth valve is arranged between the third inlet pressure gauge and the sixth valve, and the tenth valve, the eleventh valve and the twelfth valve are connected in parallel with the second injection pressure gauge, the second injection pressure gauge is connected with the nineteenth valve, the second injection fluid intermediate container is connected with the nineteenth valve, the twentieth valve is connected with the second injection fluid intermediate container, and the second injection pressure pump is connected with the twentieth valve.

[0012] Wherein, the outlet injection fluid component includes a seventh valve, an eighth valve, a ninth valve, a first injection pressure gauge, a seventeenth valve, a first injection fluid intermediate container, an eighteenth valve and a first injection pressure pump, the seventh valve is arranged between the first outlet pressure gauge and the first valve, the eighth valve is arranged between the second outlet pressure gauge and the second valve, the ninth valve is arranged between the third outlet pressure gauge and the third valve, and the seventh valve, the eighth valve and the ninth valve are connected in parallel with the first injection pressure gauge, the seventeenth valve is connected with the first injection pressure gauge, the first injection fluid intermediate container is connected with the seventeenth valve, the eighteenth valve is connected with the first injection fluid intermediate container, and the first injection pressure pump is connected with the eighteenth valve.

[0013] The beneficial effects of the multi-layer collaborative development indoor simulation device suitable for an inclined gas storage reservoir of the present invention are: it has an inclination function, can connect long cores with various porosity and permeability conditions in parallel, can simulate different injection and production cycles of the gas storage reservoir, simulate different fluid injections, and measure the effects of different injection and production methods and different injection media on the gas storage reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a system diagram of a multi-layer collaborative development indoor simulation device suitable for an inclined gas storage reservoir of the present invention.

[0016] Figure 2It is a comparison curve diagram of crude oil recovery degree with different gas injection amounts in Example 1 of the present invention.

[0017] Figure 3 It is a curve diagram of liquid production in different rounds of the cyclic injection and production stage of Example 1 of the present invention.

[0018] Figure 4 It is a gas injection volume curve diagram of different rounds in the cyclic injection and production stage of Example 1 of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the back pressure valve of the present invention.

[0020] Figure 6 It is a schematic diagram of the base structure of the back pressure valve of the present invention.

[0021] Figure 7 It is a structural schematic diagram of the top fixing structure of the back pressure valve of the present invention.

[0022] Figure 8 It is a schematic diagram of the working placement structure of the long core holder of the present invention.

[0023] 1-first long core holder, 2-second long core holder, 3-third long core holder, 4-first confining pressure control valve, 5-second confining pressure control valve, 6-third confining pressure control valve, 7-fourth confining pressure control valve, 8-confining pressure gauge, 9-confining pressure pump, 10-first inlet pressure gauge, 11-second inlet pressure gauge, 12-third inlet pressure gauge, 13-first outlet pressure gauge, 14-second outlet pressure gauge, 15-third outlet pressure gauge, 16-first 1st valve, 17-2nd valve, 18-3rd valve, 19-4th valve, 20-5th valve, 21-6th valve, 22-7th valve, 23-8th valve, 24-9th valve, 25-10th valve, 26-11th valve, 27-12th valve, 28-holder outlet back pressure valve, 29-holder inlet back pressure valve, 30-export back pressure cylinder, 31-13th valve, 32-export back pressure gauge, 33-14th valve, 34-15th valve, 35-16th valve, 36-17th valve, 37-18th valve, 38-19th valve, 40-19th valve, 41-18th valve, 42-19th valve, 43-19th valve, 44-19th valve, 45-19th valve, 46-19th valve, 47-19th valve, 48-19th valve, 49-20th valve, 50-20th valve, 51-20th valve, 52-20th valve, 53-20th valve, 54-20th valve, 55-20th valve, 56-20th valve, 57-20th valve, 58-20th valve, 59-21th valve, 59-22th valve, 60-23th valve, 61-24th valve, 62-25th valve, 63-26th valve, 64-27th valve, 65-28th valve, 66-29th valve, 67-29th valve, 68-21th valve, 69-21th valve, 70-22th valve, 71-23th valve, 72-24th valve, 73-2 -Outlet back pressure pump, 35-inlet back pressure gas cylinder, 36-the fifteenth valve, 37-inlet back pressure pressure gauge, 38-the sixteenth valve, 39-inlet back pressure pump, 40-the first outlet liquid meter, 41-the second outlet liquid meter, 42-the third outlet liquid meter, 43-the first outlet gas flow meter, 44-the second outlet gas flow meter, 45-the third outlet gas flow meter, 46-the first inlet liquid meter, 47-the second inlet liquid meter, 48-the third inlet liquid meter, 49-the first inlet gas flow meter, 50-the second inlet gas flow meter, 51-the third inlet gas flow meter, 52-the first injection pressure gauge, 53-the seventeenth valve, 54-the first injection fluid intermediate container, 55-the eighteenth valve, 56-the first injection pressure pump, 57-the second injection pressure gauge, 58-the nineteenth valve, 59-the second injection fluid intermediate container, 60-the twentieth valve, 61-the second injection pressure pump. DETAILED DESCRIPTION

[0024] See also Figures 1 to 8 , Figure 1 It is a system diagram of a multi-layer collaborative development indoor simulation device suitable for an inclined gas storage reservoir of the present invention; Figure 2 is a comparison curve diagram of crude oil recovery degree with different gas injection amounts in Example 1 of the present invention; Figure 3 is a curve diagram of liquid production in different rounds of the cyclic injection and production stage of Example 1 of the present invention; Figure 4 is a gas injection volume curve diagram of different rounds in the cyclic injection and production stage of Example 1 of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the back pressure valve of the present invention; Figure 6 It is a schematic diagram of the base structure of the back pressure valve of the present invention; Figure 7 It is a structural schematic diagram of the top fixing structure of the back pressure valve of the present invention; Figure 8It is a schematic diagram of the working placement structure of the long core holder of the present invention.

[0026] The present invention provides an indoor simulation device for multi-layer collaborative development of an inclined gas storage reservoir, comprising a first long core holder 1, a second long core holder 2, a third long core holder 3, a confining pressure assembly, an injection assembly, an outlet assembly, an inlet back pressure assembly, an outlet back pressure assembly, an inlet injection fluid assembly and an outlet injection fluid assembly, wherein the confining pressure assembly is respectively connected to the first long core holder 1, the second long core holder 2 and the third long core holder 3, the injection assembly is connected to one end of the first long core holder 1, the second long core holder 2 and the third long core holder 3, the outlet assembly is connected to one end of the first long core holder 1, the second long core holder 2 and the third long core holder 3 away from the injection assembly, the inlet back pressure assembly is connected to the injection assembly, the inlet injection fluid assembly is connected to the injection assembly, the outlet back pressure assembly is connected to the outlet assembly, and the outlet injection fluid assembly is connected to the outlet assembly.

[0027] Furthermore, the confining pressure assembly includes a first confining pressure control valve 4, a second confining pressure control valve 5, a third confining pressure control valve 6, a fourth confining pressure control valve 7, a confining pressure gauge 8 and a confining pressure pump 9, the first confining pressure control valve 4 is connected to the third long core clamp 3, the second confining pressure control valve 5 is connected to the second long core clamp 2, the third confining pressure control valve 6 is connected to the first long core clamp 1, and the first confining pressure control valve 4, the second confining pressure control valve 5 and the third confining pressure control valve 6 are respectively connected to the confining pressure pump 9, and the confining pressure gauge 8 and the fourth confining pressure control valve 7 are arranged between the third confining pressure control valve 6 and the confining pressure pump 9 from left to right.

[0028] Further, the injection assembly includes a first inlet pressure gauge 10, a second inlet pressure gauge 11, a third inlet pressure gauge 12, a fourth valve 19, a fifth valve 20, a sixth valve 21, a clamp inlet back pressure valve 29, a first inlet liquid meter 46, a second inlet liquid meter 47, a third inlet liquid meter 48, a first inlet gas flow meter 49, a second inlet gas flow meter 50 and a third inlet gas flow meter 51, the two ends of the first inlet pressure gauge 10 are respectively connected to the first long core clamp 1 and the clamp inlet back pressure valve 29, the two ends of the second inlet pressure gauge 11 are respectively connected to the second long core clamp 2 and the clamp inlet back pressure valve 29, the two ends of the third inlet pressure gauge 12 are respectively connected to the third long core clamp 3 and the clamp inlet back pressure valve 29. The fourth valve 19 is arranged between the first inlet pressure gauge 10 and the clamp inlet back pressure valve 29, the fifth valve 20 is arranged between the second inlet pressure gauge 11 and the clamp inlet back pressure valve 29, the sixth valve 21 is arranged between the third inlet pressure gauge 12 and the clamp inlet back pressure valve 29, the first inlet liquid meter 46, the second inlet liquid meter 47 and the third inlet liquid meter 48 are respectively arranged at one end of the clamp inlet back pressure valve 29, the first inlet gas flow meter 49 is adapted to the first inlet liquid meter 46, the second inlet gas flow meter 50 is adapted to the second inlet liquid meter 47, and the third inlet gas flow meter 51 is adapted to the third inlet liquid meter 48.

[0029] Further, the outlet assembly includes a first outlet pressure gauge 13, a second outlet pressure gauge 14, a third outlet pressure gauge 15, a first valve 16, a second valve 17, a third valve 18, a clamp outlet back pressure valve 28, a first outlet liquid meter 40, a second outlet liquid meter 41, a third outlet liquid meter 42, a first outlet gas flow meter 43, a second outlet gas flow meter 44 and a third outlet gas flow meter 45, the two ends of the first outlet pressure gauge 13 are respectively connected to the first long core clamp 1 and the clamp outlet back pressure valve 28, the two ends of the second outlet pressure gauge 14 are respectively connected to the second long core clamp 2 and the clamp outlet back pressure valve 28, the two ends of the third outlet pressure gauge 15 are respectively connected to the third long core clamp 3 and the clamp outlet back pressure valve 28. The first outlet pressure gauge 13 is connected to the clamp outlet back pressure valve 28, the first valve 16 is arranged between the first outlet pressure gauge 13 and the clamp outlet back pressure valve 28, the second valve 17 is arranged between the second outlet pressure gauge 14 and the clamp outlet back pressure valve 28, the third valve 18 is arranged between the third outlet pressure gauge 15 and the clamp outlet back pressure valve 28, the first outlet liquid meter 40, the second outlet liquid meter 41 and the third outlet liquid meter 42 are respectively arranged at one end of the clamp outlet back pressure valve 28, the first outlet gas flow meter 43 is adapted to the first outlet liquid meter 40, the second outlet gas flow meter 44 is adapted to the second outlet liquid meter 41, and the third outlet gas flow meter 45 is adapted to the third outlet liquid meter 42.

[0030] Furthermore, the inlet back pressure assembly includes an inlet back pressure gas cylinder 35, a fifteenth valve 36, an inlet back pressure pressure gauge 37, a sixteenth valve 38 and an inlet back pressure pump 39, the inlet back pressure pressure gauge 37 is connected to the clamper inlet back pressure valve 29, the fifteenth valve 36 is connected to the inlet back pressure pressure gauge 37, the inlet back pressure gas cylinder 35 is connected to the fifteenth valve 36, the sixteenth valve 38 is connected to the inlet back pressure gas cylinder 35, and the inlet back pressure pump 39 is connected to the sixteenth valve 38.

[0031] Furthermore, the outlet back-pressure assembly includes an outlet back-pressure gas cylinder 30, a thirteenth valve 31, an outlet back-pressure pressure gauge 32, a fourteenth valve 33 and an outlet back-pressure pump 34, the outlet back-pressure pressure gauge 32 is connected to the clamper outlet back-pressure valve 28, the thirteenth valve 31 is connected to the outlet back-pressure pressure gauge 32, the outlet back-pressure gas cylinder 30 is connected to the thirteenth valve 31, the fourteenth valve 33 is connected to the outlet back-pressure gas cylinder 30, and the outlet back-pressure pump 34 is connected to the fourteenth valve 33.

[0032] Further, the inlet fluid injection component includes a tenth valve 25, an eleventh valve 26, a twelfth valve 27, a second injection pressure gauge 57, a nineteenth valve 58, a second injection fluid intermediate container 59, a twentieth valve 60 and a second injection pressure pump 61, the tenth valve 25 is arranged between the first inlet pressure gauge 10 and the fourth valve 19, the eleventh valve 26 is arranged between the second inlet pressure gauge 11 and the fifth valve 20, the twelfth valve 27 is arranged between the third inlet pressure gauge 12 and the sixth valve 21, and the tenth valve 25, the eleventh valve 26 and the twelfth valve 27 are connected in parallel to the second injection pressure gauge 57, the second injection pressure gauge 57 is connected to the nineteenth valve 58, the second injection fluid intermediate container 59 is connected to the nineteenth valve 58, the twentieth valve 60 is connected to the second injection fluid intermediate container 59, and the second injection pressure pump 61 is connected to the twentieth valve 60.

[0033] Further, the outlet injection fluid component includes a seventh valve 22, an eighth valve 23, a ninth valve 24, a first injection pressure gauge 52, a seventeenth valve 53, a first injection fluid intermediate container 54, an eighteenth valve 55 and a first injection pressure pump 56, the seventh valve 22 is arranged between the first outlet pressure gauge 13 and the first valve 16, the eighth valve 23 is arranged between the second outlet pressure gauge 14 and the second valve 17, the ninth valve 24 is arranged between the third outlet pressure gauge 15 and the third valve 18, and the seventh valve 22, the eighth valve 23 and the ninth valve 24 are connected in parallel with the first injection pressure gauge 52, the seventeenth valve 53 is connected with the first injection pressure gauge 52, the first injection fluid intermediate container 54 is connected with the seventeenth valve 53, the eighteenth valve 55 is connected with the first injection fluid intermediate container 54, and the first injection pressure pump 56 is connected with the eighteenth valve 55.

[0034] In this embodiment, the inclination function can be used to connect long cores with various porosity and permeability conditions in parallel, so as to simulate different injection and production cycles of the gas storage reservoir, simulate the injection of different fluids, and measure the effects of different injection and production methods and different injection media on the gas storage reservoir.

[0035] Embodiment 1:

[0036] A gas storage facility was rebuilt in an oil field. The reservoir dip angle was 11° and the reservoir porosity and permeability range was large. It was urgent to understand the differences in the formation crude oil recovery capacity of different reservoirs under the same injection conditions and the gas storage operation capacity under the same injection and production conditions. Therefore, three groups of cores with representative reservoirs and large porosity and permeability differences were selected for long core experiments. The experimental parameters of the three groups are shown in Table 1. In the early stage, water was injected into the low part to a recovery degree of 10%, and then gas injection was used until no oil was produced, and then the gas storage facility operation stage was carried out;

[0037]

[0038]

[0039] Table 1

[0040] During core assembly, three groups of cores were respectively loaded into the corresponding first long core holder 1, the second long core holder 2 and the third long core holder 3, so that the end close to the first injection fluid component was raised a portion so that the inclination angle of the whole system was 11°, and the experiment was started after saturation of the formation oil.

[0041] Gas reservoir exploitation simulation: The gas storage reservoir was initially water-driven to a recovery rate of 10% and then switched to gas-driven. To simulate the development process and avoid displacement differences due to different porosity and permeability, three groups of long cores were water-driven and gas-driven, respectively. 10% water was injected into the low part (effective pore volume 10%). At this time, the high part produced oil, and the oil and gas production were recorded. Then the gas-driven process was switched to gas-driven, and gas was injected into the low part. Dry gas was injected at a rate of 0.1 ml / min. The produced oil and gas were collected and recorded every 0.1 HCPV. The gas-driven process was stopped when no oil was produced.

[0042] Gas storage operation simulation: During the operation of the gas storage, gas is injected to the upper limit pressure at the high position, and then the two ends are simultaneously mined to the lower limit pressure. In order to simulate the operation process and compare the gas injection capacity of reservoirs with different porosity and permeability, gas is injected to the three groups of long cores at the high position to the upper limit pressure and until the pressure is stable. At this time, the inlet flow rate of different long core entrances is recorded to obtain the gas injection volume of each long core. At this time, the low-position outlet valves of the first long core clamp 1, the second long core clamp and the third long core clamp 3 are closed. When the two ends are mined simultaneously, the pressure of the clamp outlet back pressure valve 28 and the clamp inlet back pressure valve 29 are kept consistent. The liquid production and gas production of the first outlet liquid meter 40, the second outlet liquid meter 41, the third outlet liquid meter 42, the first outlet gas flow meter 43, the second outlet gas flow meter 44, the third outlet gas flow meter 45, the first inlet liquid meter 46, the second inlet liquid meter 47, the third inlet liquid meter 48, the first inlet gas flow meter 49, the second inlet gas flow meter 50 and the third inlet gas flow meter 51 were recorded, and 10 rounds were repeated to complete the simulation of the operation stage of the gas storage reservoir, and the data shown in Table 2 were obtained.

[0043] Crude oil recovery Maximum gas injection volume during the injection-production cycle Cumulative liquid production during the injection-production cycle high 63.10 41.83 4.38 middle 56.79 39.74 3.94 Low 48.27 37.75 3.73

[0044] Table 2

[0045] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A multi-layer collaborative development indoor simulation device suitable for an inclined gas storage reservoir, characterized in that: The invention comprises a first long core holder, a second long core holder, a third long core holder, a confining pressure assembly, an injection assembly, an outlet assembly, an inlet back pressure assembly, an outlet back pressure assembly, an inlet injection fluid assembly and an outlet injection fluid assembly, wherein the confining pressure assembly is respectively connected to the first long core holder, the second long core holder and the third long core holder, the injection assembly is connected to one end of the first long core holder, the second long core holder and the third long core holder, the outlet assembly is connected to one end of the first long core holder, the second long core holder and the third long core holder away from the injection assembly, the inlet back pressure assembly is connected to the injection assembly, the inlet injection fluid assembly is connected to the injection assembly, the outlet back pressure assembly is connected to the outlet assembly, and the outlet injection fluid assembly is connected to the outlet assembly; The confining pressure assembly includes a first confining pressure control valve, a second confining pressure control valve, a third confining pressure control valve, a fourth confining pressure control valve, a confining pressure gauge and a confining pressure pump, the first confining pressure control valve is in communication with the third long core holder, the second confining pressure control valve is in communication with the second long core holder, the third confining pressure control valve is in communication with the first long core holder, and the first confining pressure control valve, the second confining pressure control valve and the third confining pressure control valve are in communication with the confining pressure pump respectively, and the confining pressure gauge and the fourth confining pressure control valve are sequentially arranged between the third confining pressure control valve and the confining pressure pump from left to right; The injection assembly includes a first inlet pressure gauge, a second inlet pressure gauge, a third inlet pressure gauge, a fourth valve, a fifth valve, a sixth valve, a clamp inlet back pressure valve, a first inlet liquid meter, a second inlet liquid meter, a third inlet liquid meter, a first inlet gas flow meter, a second inlet gas flow meter and a third inlet gas flow meter, the two ends of the first inlet pressure gauge are respectively connected to the first long core clamp and the clamp inlet back pressure valve, the two ends of the second inlet pressure gauge are respectively connected to the second long core clamp and the clamp inlet back pressure valve, the two ends of the third inlet pressure gauge are respectively connected to the third long core clamp and the clamp inlet back pressure valve The fourth valve is arranged between the first inlet pressure gauge and the clamp inlet back pressure valve, the fifth valve is arranged between the second inlet pressure gauge and the clamp inlet back pressure valve, the sixth valve is arranged between the third inlet pressure gauge and the clamp inlet back pressure valve, the first inlet liquid meter, the second inlet liquid meter and the third inlet liquid meter are respectively arranged at one end of the clamp inlet back pressure valve, the first inlet gas flow meter is adapted to the first inlet liquid meter, the second inlet gas flow meter is adapted to the second inlet liquid meter, and the third inlet gas flow meter is adapted to the third inlet liquid meter; The outlet assembly includes a first outlet pressure gauge, a second outlet pressure gauge, a third outlet pressure gauge, a first valve, a second valve, a third valve, a clamp outlet back pressure valve, a first outlet liquid meter, a second outlet liquid meter, a third outlet liquid meter, a first outlet gas flow meter, a second outlet gas flow meter and a third outlet gas flow meter, the two ends of the first outlet pressure gauge are respectively connected to the first long core clamp and the clamp outlet back pressure valve, the two ends of the second outlet pressure gauge are respectively connected to the second long core clamp and the clamp outlet back pressure valve, the two ends of the third outlet pressure gauge are respectively connected to the third long core clamp and the clamp outlet back pressure valve The first valve is arranged between the first outlet pressure gauge and the holder outlet back pressure valve, the second valve is arranged between the second outlet pressure gauge and the holder outlet back pressure valve, the third valve is arranged between the third outlet pressure gauge and the holder outlet back pressure valve, the first outlet liquid meter, the second outlet liquid meter and the third outlet liquid meter are respectively arranged at one end of the holder outlet back pressure valve, the first outlet gas flow meter is adapted to the first outlet liquid meter, the second outlet gas flow meter is adapted to the second outlet liquid meter, and the third outlet gas flow meter is adapted to the third outlet liquid meter; The inlet fluid injection component includes a tenth valve, an eleventh valve, a twelfth valve, a second injection pressure gauge, a nineteenth valve, a second injection fluid intermediate container, a twentieth valve and a second injection pressure pump, the tenth valve is arranged between the first inlet pressure gauge and the fourth valve, the eleventh valve is arranged between the second inlet pressure gauge and the fifth valve, the twelfth valve is arranged between the third inlet pressure gauge and the sixth valve, and the tenth valve, the eleventh valve and the twelfth valve are connected in parallel with the second injection pressure gauge, the second injection pressure gauge is connected with the nineteenth valve, the second injection fluid intermediate container is connected with the nineteenth valve, the twentieth valve is connected with the second injection fluid intermediate container, and the second injection pressure pump is connected with the twentieth valve.

2. A multi-layer collaborative development indoor simulation device suitable for an inclined gas storage reservoir as claimed in claim 1, characterized in that: The inlet back-pressure assembly includes an inlet back-pressure gas cylinder, a fifteenth valve, an inlet back-pressure pressure gauge, a sixteenth valve and an inlet back-pressure pump. The inlet back-pressure pressure gauge is connected to the clamp inlet back-pressure valve, the fifteenth valve is connected to the inlet back-pressure pressure gauge, the inlet back-pressure gas cylinder is connected to the fifteenth valve, the sixteenth valve is connected to the inlet back-pressure gas cylinder, and the inlet back-pressure pump is connected to the sixteenth valve.

3. A multi-layer collaborative development indoor simulation device suitable for an inclined gas storage reservoir as claimed in claim 1, characterized in that: The outlet back-pressure assembly includes an outlet back-pressure gas cylinder, a thirteenth valve, an outlet back-pressure pressure gauge, a fourteenth valve and an outlet back-pressure pump. The outlet back-pressure pressure gauge is connected to the outlet back-pressure valve of the clamper, the thirteenth valve is connected to the outlet back-pressure pressure gauge, the outlet back-pressure gas cylinder is connected to the thirteenth valve, the fourteenth valve is connected to the outlet back-pressure gas cylinder, and the outlet back-pressure pump is connected to the fourteenth valve.

4. A multi-layer collaborative development indoor simulation device suitable for an inclined gas storage as claimed in claim 1, characterized in that: The outlet fluid injection component includes a seventh valve, an eighth valve, a ninth valve, a first injection pressure gauge, a seventeenth valve, a first injection fluid intermediate container, an eighteenth valve and a first injection pressure pump. The seventh valve is arranged between the first outlet pressure gauge and the first valve, the eighth valve is arranged between the second outlet pressure gauge and the second valve, the ninth valve is arranged between the third outlet pressure gauge and the third valve, and the seventh valve, the eighth valve and the ninth valve are connected in parallel with the first injection pressure gauge, the seventeenth valve is connected with the first injection pressure gauge, the first injection fluid intermediate container is connected with the seventeenth valve, the eighteenth valve is connected with the first injection fluid intermediate container, and the first injection pressure pump is connected with the eighteenth valve.

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