Comparison experiment device for filling simulation of compact and non-compact reservoirs

Abstract

The invention relates to the technical field of oil-gas exploration and development, in particular to a compact and non-compact reservoir filling simulation contrast experiment device, which comprises an experiment box, a temperature controller, a gas inlet pipe, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe and a gas outlet pipe, the sliding rail is laid in the experiment box; the first sliding seat and the second sliding seat are arranged on the sliding rail in a sliding manner; the two reservoir simulation components are respectively a first reservoir simulation component and a second reservoir simulation component; wherein the first reservoir simulation assembly is fixed on the first sliding seat and is used for simulating a tight reservoir in a layered manner; wherein the second reservoir simulation assembly is fixed on the second sliding seat and is used for simulating a non-tight reservoir in a layered manner; and the auxiliary assembly is used for providing filling simulation assistance for the two reservoir simulation assemblies. The method reduces the cost, improves the efficiency, and facilitates the optimization of a mining scheme.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas exploration and development, and is a charging simulation comparison experiment device for tight and non-tight reservoirs. BACKGROUND

[0002] In the field of oil and gas exploration and development, the understanding and simulation of reservoir characteristics are crucial for improving recovery efficiency and optimizing development plans. Reservoirs are generally divided into tight reservoirs and non-tight reservoirs, which have significant differences in pore structure, permeability, fluid distribution, etc., so their charging processes and fluid migration laws are also different. In order to deeply understand the dynamic behavior of these two types of reservoirs during the charging process, it is necessary to conduct charging simulation research on them.

[0003] When simulating the charging of tight reservoirs or non-tight reservoirs, numerical simulation method is often used. This method simulates the rock properties, pore structure, fluid properties and flow rules in the reservoir by constructing a mathematical model, so as to predict and analyze the dynamic behavior of fluids in the reservoir. However, due to the influence of multiple factors such as model assumptions, parameter settings and calculation accuracy, a physical simulation experiment model is usually established to simulate the behavior of reservoirs and fluids to verify the results of numerical simulation.

[0004] Physical simulation experiments generally simulate the seepage and distribution of fluids in the reservoir by means of pressurization, gas injection or oil injection, etc. However, this method needs to be combined with precise detection equipment, such as using CT machine to observe the movement of fluids, but the cost is high.

[0005] In addition, acoustic-based observation methods can also be used, such as using ultrasonic or acoustic sensors to detect the movement of fluids in the reservoir. This method can infer the properties and movement state of fluids by measuring the propagation speed, attenuation, etc. of acoustic waves in fluids, but this method requires more complex signal processing and analysis techniques. SUMMARY

[0006] The present application provides a charging simulation comparison experiment device for tight and non-tight reservoirs, which overcomes the shortcomings of the prior art and effectively solves the problem of high cost and complex technology of the prior art.

[0007] The technical scheme of the present application is realized by the following measures: a charging simulation comparison experiment device for tight and non-tight reservoirs, comprising: an experiment box, which is internally provided with a temperature controller for adjusting the temperature in the experiment box to reach a suitable temperature for experiments; a slide rail laid in the experiment box; a first sliding seat and a second sliding seat, which are slidingly arranged on the slide rail; two reservoir simulation assemblies, respectively, a first reservoir simulation assembly and a second reservoir simulation assembly; wherein the first reservoir simulation assembly is fixed on the first sliding seat and is used for simulating a dense reservoir in layers; wherein the second reservoir simulation assembly is fixed on the second sliding seat and is used for simulating a non-dense reservoir in layers; and an auxiliary assembly for providing charging simulation assistance for the two reservoir simulation assemblies.

[0008] The reservoir simulation assembly can include: a base; a plurality of reservoir simulation units in series and detachable, which are detachably placed on the base and carry samples; and an outer cylinder which is threadedly connected to the base and is sleeved outside the reservoir simulation units.

[0009] The reservoir simulation unit can include: a ring; a ring groove opened at one end of the ring; a ring protrusion integrally formed on the ring and away from the one end of the ring groove, the ring protrusion being matched in shape and size with the ring groove; and a water-permeable membrane fixed at one end of the ring.

[0010] The surface of the ring groove and / or the ring protrusion can be embedded with a sealing ring pad.

[0011] The base can include: a carrying groove with a closed end at one end and an open end at the other end, and the open end of the carrying groove being fixed with an inner ring; a connecting ring integrally formed at the open end of the carrying groove; and a carrying plate which is detachably placed on the inner ring, is supported by the inner ring and has its upper surface flush with the end surface of the open end; a collection bin is formed between the carrying plate and the carrying groove, and the surface of the carrying plate is provided with micropores.

[0012] The auxiliary assembly can include: an axial pressure assembly corresponding to the reservoir simulation assembly, which at least includes a pressure seat and a locking seat, wherein the locking seat is used for positioning and locking the topmost reservoir simulation unit, and the pressure seat is used for pressurizing the sample in the topmost reservoir simulation unit; a charging tank having a charging end connected to the pressure seat for charging oil and / or gas to the sample in the reservoir simulation unit; a negative pressure generator having a negative pressure generation end connected to the pressure seat for vacuum suction treatment of the sample in the reservoir simulation unit; And a confining pressure loading pump has a pump liquid end connected to the locking seat for filling confining pressure liquid between the reservoir simulation single piece and the outer cylinder, and the outer cylinder is also connected with a liquid outlet.

[0013] The axial pressure assembly can further include: A positioning plate fixed in the experimental box; A pressure cylinder fixed on the positioning plate, and an output end of the pressure cylinder is fixed with a pressure seat, an end of the pressure seat has a filling groove for connecting a filling end of a filling tank and a negative pressure generating end of a negative pressure generator; And a locking cylinder fixed on the positioning plate, and an output end of the locking cylinder is fixed with a locking seat, a middle part of the locking seat has a through hole for sealingly passing through the pressure seat, the locking seat has a cavity for communicating with the pump liquid end of the confining pressure loading pump, and an outer surface of the cavity also has a liquid outlet hole for filling confining pressure liquid into the outer cylinder, and the locking seat is in sealing sliding connection with the outer cylinder.

[0014] The bottom of the filling groove can also be embedded with an intercepting cotton pad.

[0015] The output end of the filling tank can be communicated with a mixing pipe for mixing a fluorescent agent into the output end of the filling tank.

[0016] The following is a further optimization or / and improvement of the above technical solutions: The first reservoir simulation assembly is used for layered simulation of a tight reservoir, and the second reservoir simulation assembly is used for layered simulation of a non-tight reservoir, so that the filling simulation comparison of the tight and non-tight reservoirs can be realized. And since the first reservoir simulation assembly and the second reservoir simulation assembly can both realize layered simulation of a reservoir, the fluid conditions in the reservoir can be viewed layer by layer in the subsequent stage, so that the detection equipment does not need to be relied on, the cost is reduced, and the efficiency is improved. At the same time, the simulation results can directly show the movement and distribution of the fluid in the reservoir, which is convenient for researchers to analyze and make decisions, so as to optimize the exploitation scheme in the subsequent stage, improve the recovery rate of the oil and gas reservoir, and further increase the economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic view of a filling simulation comparison experimental device for a tight and non-tight reservoir of an embodiment of the present application.

[0018] Figure 2 It is a structure schematic view of a filling simulation comparison experimental device for a tight and non-tight reservoir of an embodiment of the present application. Figure 1 It is a left enlarged structure schematic view of the filling simulation comparison experimental device.

[0019] Figure 3 It is a plane structure schematic view of a reservoir simulation single piece in the filling simulation comparison experimental device for a tight and non-tight reservoir of an embodiment of the present application.

[0020] Figure 4A schematic diagram of a three-dimensional structure of a reservoir simulation unit in a filling simulation comparison experimental device for dense and non-dense reservoirs of an embodiment of the present application.

[0021] Figure 5 A schematic diagram of a three-dimensional structure of another direction of a reservoir simulation unit in a filling simulation comparison experimental device for dense and non-dense reservoirs of an embodiment of the present application.

[0022] Figure 6 A schematic diagram of a three-dimensional structure of a sliding rail and a first sliding seat in a filling simulation comparison experimental device for dense and non-dense reservoirs of an embodiment of the present application.

[0023] Figure 7 A schematic diagram of a planar structure of a base in a filling simulation comparison experimental device for dense and non-dense reservoirs of an embodiment of the present application.

[0024] Figure 8 A schematic diagram of a three-dimensional structure of a base in a filling simulation comparison experimental device for dense and non-dense reservoirs of an embodiment of the present application.

[0025] Figure 9 A schematic diagram of a three-dimensional structure of a base in a filling simulation comparison experimental device for dense and non-dense reservoirs of an embodiment of the present application.

[0026] The codes in the drawings are as follows: 1 is an experimental box, 2 is a sliding rail, 3 is a first sliding seat, 4 is a second sliding seat, 5 is a filling tank, 6 is a negative pressure generator, 7 is an axial pressure assembly, 8 is a confining pressure loading pump, 9 is a reservoir simulation assembly, 71 is a positioning plate, 72 is a pressure cylinder, 73 is a pressure seat, 74 is a filling groove, 75 is a locking seat, 76 is a locking cylinder, 91 is a base, 92 is a reservoir simulation unit, 93 is an outer cylinder, 921 is a ring, 922 is a ring groove, 923 is a ring convex, 924 is a water permeable membrane, 911 is a bearing groove, 912 is a connecting ring, 913 is a bearing plate, 914 is a collection bin, 915 is a micropore, and 916 is an inner ring. DETAILED DESCRIPTION

[0027] The present application is not limited by the following embodiments, and the specific implementation can be determined according to the technical solutions of the present application and the actual situation.

[0028] The present application will be further described below in conjunction with embodiments: Embodiment 1: Please refer to Figures 1 to 9 The embodiment of the present application provides a filling simulation comparison experimental device for dense and non-dense reservoirs, which comprises: The experimental box 1 is internally provided with a temperature controller, which is used to adjust the temperature in the experimental box 1 to reach a suitable temperature for experiments, which can be a device integrated with a heater and a cooler; A slide rail 2 is laid in the experiment box 1; in the present application, doors are arranged on both sides of the experiment box 1, and the slide rail 2 is laid in the experiment box 1 along the connecting direction of the two doors; A first slide 3 and a second slide 4 are slidingly arranged on the slide rail 2; Two reservoir simulation assemblies 9, namely a first reservoir simulation assembly and a second reservoir simulation assembly; the first reservoir simulation assembly is fixed on the first slide 3 and is used for layered simulation of a dense reservoir; the second reservoir simulation assembly is fixed on the second slide 4 and is used for layered simulation of a non-dense reservoir; And an auxiliary assembly is used for providing charging simulation assistance for the two reservoir simulation assemblies 9.

[0029] In implementation, the position of the first reservoir simulation assembly can be adjusted by driving the first slide 3, so that the first reservoir simulation assembly is located inside or outside the experiment box 1. Similarly, the position of the second reservoir simulation assembly can be adjusted by driving the second slide 4, so that the second reservoir simulation assembly is located inside or outside the experiment box 1. When the first reservoir simulation assembly and the second reservoir simulation assembly are located inside the experiment box 1, they can be kept at the same experimental temperature, which facilitates comparative experiments. When the first reservoir simulation assembly and the second reservoir simulation assembly are located outside the experiment box 1, the simulation results of the first reservoir simulation assembly and the second reservoir simulation assembly can be conveniently checked by the operator.

[0030] Of course, in actual implementation, a power system such as a telescopic rod system or a screw-nut pair system can also be configured for the first slide 3 and the second slide 4 to realize automatic movement.

[0031] In addition, the first reservoir simulation assembly is used for layered simulation of a dense reservoir, and the second reservoir simulation assembly is used for layered simulation of a non-dense reservoir, so that charging simulation comparison of dense and non-dense reservoirs can be realized. It should be noted that in the present embodiment, a large and precise detection device is not required to observe the movement and distribution of the fluid, because the first reservoir simulation assembly and the second reservoir simulation assembly can both realize layered simulation of a reservoir, and the fluid situation in the reservoir can be viewed layer by layer in the subsequent stage.

[0032] Specifically, the reservoir simulation assembly 9 includes: A base 91; A plurality of reservoir simulation units 92 which are sequentially detachable and connected in series, the reservoir simulation units 92 being detachably placed on the base 91, and the reservoir simulation units 92 carrying samples; And an outer cylinder 93 which is threadedly connected to the base 91 and is sleeved outside the reservoir simulation units 92.

[0033] The plurality of reservoir simulation units 92 can be used for layered simulation of a reservoir, and the reservoir simulation unit 92 includes: The side of the ring 921 is preferably made of a flexible material.

[0034] The ring groove 922 is formed at one end of the ring 921. The ring protrusion 923 is integrally formed at the other end of the ring 921 away from the ring groove 922, and the size and shape of the ring protrusion 923 are matched with the ring groove 922 so that the ring protrusion 923 can be inserted into the ring groove 922. The water-permeable membrane 924 is fixed at one end of the ring 921.

[0035] It should be noted that, in the implementation, a certain amount of corresponding sample is placed in the ring 921 step by step, and the sample is pre-pressed step by step to keep it relatively compact during the sample placement process, and then the ring 921 is connected in sequence, and the sample can be viewed by disassembling the ring 921 in sequence when the experimental results are viewed.

[0036] As a preferred embodiment, the surface of the ring groove 922 and / or the ring protrusion 923 is embedded with a sealing ring pad.

[0037] In addition, the base 91 includes: The bearing groove 911 has a closed end at one end and an open end at the other end, and the open end of the bearing groove 911 is fixed with the inner ring 916. The connecting ring 912 is integrally formed at the open end of the bearing groove 911. The bearing plate 913 is detachably placed on the inner ring 916, supported by the inner ring 916, and the upper surface of the bearing plate 913 is flush with the end surface of the open end. The collection bin 914 is formed between the bearing plate 913 and the bearing groove 911, and the surface of the bearing plate 913 is provided with the micro-holes 915.

[0038] That is, in this embodiment, the base 91 is actually used to bear the ring 921 and collect the overflow fluid in the sample.

[0039] In this embodiment, the auxiliary assembly includes: The axial pressure assembly 7 corresponding to the reservoir simulation assembly 9 includes at least a pressure seat 73 and a locking seat 75, wherein the locking seat 75 is used to position and lock the topmost reservoir simulation single piece, and the pressure seat 73 is used to pressurize the sample in the topmost reservoir simulation single piece. The filling tank 5 has a filling end connected to the pressure seat 73 for filling oil and / or gas into the sample in the reservoir simulation single piece. The negative pressure generator 6 has a negative pressure generation end connected to the pressure seat 73 for vacuum suction treatment of the sample in the reservoir simulation single piece. and a confining pressure loading pump having a pump liquid end connected to the locking seat 75 for loading confining pressure liquid between the reservoir simulation units 92 and the outer cylinder 93, and the outer cylinder 93 is further connected with a liquid outlet.

[0040] That is, in the embodiment, the sample in the topmost reservoir simulation unit can be pressurized by the pressurizing seat 73, and the pressure is transmitted to other reservoir simulation units, thereby achieving axial pressure adjustment of the reservoir simulation assembly 9.

[0041] To further improve the confining pressure adjustment of the reservoir simulation assembly 9, the side of the ring 921 is made of flexible material.

[0042] In addition, after the reservoir simulation assembly 9 is sent into the experimental box 1, the locking cylinder 76 is first elongated to position the reservoir simulation assembly 9 by the locking seat, and then the pressurizing cylinder 72 is elongated to connect the pressurizing seat 73 and the locking seat in a sealed manner, at this time, the negative pressure generator 6 is started to perform vacuumizing treatment on the sample, and then the pressurizing cylinder 72 is continuously elongated to pressurize the reservoir simulation assembly 9 by the pressurizing seat 73, and the confining pressure loading pump loads confining pressure liquid through the locking seat to pressurize the reservoir simulation assembly 9.

[0043] It should be noted that since the pressurizing seat and the locking seat are movable up and down, the pipes connected with the two should be flexible and telescopic.

[0044] In the embodiment, the axial pressurizing assembly 7 further comprises: a positioning plate 71 fixed in the experimental box 1; a pressurizing cylinder 72 fixed on the positioning plate 71, and the output end of the pressurizing cylinder 72 is fixed with the pressurizing seat 73, and the end of the pressurizing seat 73 is provided with a filling groove 74 for connecting the filling end of the filling tank 5 and the negative pressure end of the negative pressure generator 6; and a locking cylinder 76 fixed on the positioning plate 71, and the output end of the locking cylinder 76 is fixed with the locking seat 75, and the locking seat 75 is T-shaped and has a through hole in the middle for the pressurizing seat 73 to pass through in a sealed manner, and the locking seat 75 has a cavity for communicating with the pump liquid end of the confining pressure loading pump 8, and the outer surface of the cavity is further provided with a liquid outlet hole for discharging confining pressure liquid into the outer cylinder 93, and the locking seat 75 is connected with the outer cylinder 93 in a sealed and sliding manner.

[0045] As a preferred embodiment, the bottom of the filling groove 74 is further embedded with an intercepting cotton pad.

[0046] As a preferred embodiment, the output end of the filling tank 5 is communicated with a mixing pipe for mixing a fluorescent agent into the output end of the filling tank 5. By mixing a fluorescent agent into the fluid, the intuitiveness of observing the fluid motion path can be further improved.

[0047] The above technical features constitute embodiments of the present application, which have strong adaptability and implementation effects. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A device for simulating the contrast experiment of the filling of compact and non-compact reservoirs, characterized in that The utility model relates to a laboratory box for simulating reservoirs, and more particularly to a laboratory box for simulating reservoirs with two reservoir simulation assemblies and an auxiliary assembly. The laboratory box comprises: an experimental box, which is internally provided with a temperature controller for adjusting the temperature in the experimental box to a suitable temperature for experiments; a slide rail laid in the experimental box; a first slide and a second slide, which are slidably arranged on the slide rail; two reservoir simulation assemblies, namely a first reservoir simulation assembly and a second reservoir simulation assembly; the first reservoir simulation assembly is fixed to the first slide and used for simulating a dense reservoir in layers; the second reservoir simulation assembly is fixed to the second slide and used for simulating a non-dense reservoir in layers; and 2. The experimental apparatus for simulating the injection of a contrast medium into a dense and non-dense reservoir according to claim 1, characterized in that an auxiliary assembly for providing charging simulation assistance for the two reservoir simulation assemblies. The reservoir simulation assembly comprises: a base; a plurality of reservoir simulation units successively connected in series and detachably placed on the base, the reservoir simulation units carrying samples; 3. The experimental apparatus for simulating the displacement of a dense and a non-dense reservoir according to claim 2, characterized in that and an outer cylinder threadedly connected to the base and sleeved on the outside of the reservoir simulation units. The reservoir simulation unit comprises: a ring; a ring groove opened at one end of the ring; a ring protrusion integrally formed on the ring and away from the end of the ring groove, the ring protrusion being matched in shape and size with the ring groove; 4. The experimental apparatus for simulating the injection of a contrast medium into a dense and non-dense reservoir according to claim 3, characterized in that and a water-permeable membrane fixed to one end of the ring.

5. The experimental apparatus for simulating the displacement of a dense and a non-dense reservoir according to claim 2 or 3, characterized in that The surface of the ring groove and / or the ring protrusion is embedded with a sealing ring pad. The base comprises: a bearing groove with a closed end at one end and an open end at the other end, and the open end of the bearing groove being fixed with an inner ring; a connecting ring integrally formed at the open end of the bearing groove; and a bearing plate detachably placed on the inner ring for support and making the upper surface of the bearing plate flush with the end surface of the open end; 6. The compacted and un-compacted reservoirs infill simulation comparative experimental set-up as claimed in claim 1 or 2 or 3 or 4 wherein a collection bin is formed between the bearing plate and the bearing groove, and the surface of the bearing plate is provided with micropores. The auxiliary assembly comprises: an axial pressure assembly corresponding to the reservoir simulation assembly, which at least comprises a pressure seat and a locking seat, wherein the locking seat is used for positioning and locking the topmost reservoir simulation unit, and the pressure seat is used for pressurizing the sample in the topmost reservoir simulation unit; a charging tank having a charging end connected to the pressure seat for charging the sample in the reservoir simulation unit with oil and / or gas; 7. The experimental apparatus for simulating the displacement of a dense and a non-dense reservoir according to claim 6, characterized in that a negative pressure generator having a negative pressure generation end connected to the pressure seat for vacuum suction treatment of the sample in the reservoir simulation unit; and a confining pressure loading pump having a pump liquid end connected to the locking seat for charging confining pressure liquid between the reservoir simulation unit and the outer cylinder, and the outer cylinder is further connected with a liquid discharge port. The axial pressure assembly further comprises: a positioning plate fixed in the experimental box; a pressure cylinder fixed to the positioning plate, and the output end of the pressure cylinder is fixed with the pressure seat, the end of the pressure seat is provided with a charging groove for connecting the charging end of the charging tank and the negative pressure generation end of the negative pressure generator; 8. The experimental apparatus for simulating the displacement of a dense and a non- dense reservoir according to claim 7, characterized in that and a locking cylinder fixed to the positioning plate, and the output end of the locking cylinder is fixed with the locking seat, the middle part is provided with a through hole for the pressure seat to seal through, the locking seat has a cavity for communication with the pump liquid end of the confining pressure loading pump, the outer surface of the cavity is further provided with a liquid discharge hole for discharging confining pressure liquid into the outer cylinder, and the locking seat is in sealing sliding connection with the outer cylinder.

9. The experimental apparatus for simulating the filling of a tight versus a non-tight reservoir according to claim 6 or 7 or 8, characterized in that The bottom of the charging groove is further embedded with an intercepting cotton pad. The output end of the charging tank is communicated with a mixing pipe for mixing a fluorescent agent into the output end of the charging tank.

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