Intelligent horizontal high-pressure reaction bin and rock sample mounting structure and use method

Abstract

The invention discloses an intelligent horizontal high-pressure reaction bin which comprises a support used as a component for supporting other structures; the pressure bin body is horizontally and transversely arranged on the support, and a hollow cavity is formed in the pressure bin body and serves as a cavity for high-temperature, high-pressure and high-stress reaction of the rock sample; the pressure bin cover and the pressure bin body are oppositely arranged on the support, the pressure bin body is matched with the pressure bin cover, and the pressure bin cover and the pressure bin body are closed to form a sealed cavity; the movable guide rail is arranged on the support, the pressure bin cover is arranged on the movable guide rail in a sliding mode, and the pressure bin cover slides relative to the pressure bin body through the movable guide rail; the sample platform is used for placing a rock sample, and the sample platform is transversely and horizontally fixed on the inner side of the pressure bin cover. The device has the advantages that in-situ conditions of high temperature, high pressure and high stress of a deep reservoir are realized, and an experimental device for simulating a multiphase fluid migration process can be arranged.

Description

Technical Field

[0001] The present invention relates to the field of high-pressure experimental devices, and in particular to an intelligent horizontal high-pressure reaction chamber, a rock sample installation structure and a usage method thereof. Background Art

[0002] In fields such as drilling exploration tests, geological surveys or other fields involving sealed high-pressure tests, high-pressure reaction vessels are often required in laboratories. In the prior art, reaction chambers for high-pressure experiments on rock samples often adopt a vertical chamber structure. However, due to the need for fixing the rock samples, there are great inconveniences when placing the rock samples. And because the chamber cover is heavy, it is very inconvenient to move the cover every time an experiment is carried out. And manual operation of the equipment is not conducive to the subsequent intelligent management of the experimental process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is how to facilitate high-temperature, high-pressure and high-stress experiments on rock samples. In view of the above technical problem to be solved, an intelligent horizontal high-pressure reaction chamber, a rock sample installation structure and a usage method thereof are now proposed.

[0004] To achieve the above object, the present invention provides the following technical solution: An intelligent horizontal high-pressure reaction chamber, comprising

[0005] A bracket, used as a component for supporting other structures;

[0006] A pressure chamber body, horizontally placed on the bracket, with a hollow cavity inside, serving as a cavity for high-temperature, high-pressure and high-stress reactions of rock samples;

[0007] A pressure chamber cover, oppositely arranged with the pressure chamber body on the bracket, the pressure chamber body is matched with the pressure chamber cover, and a sealed cavity is formed after the pressure chamber cover and the pressure chamber body are closed;

[0008] A moving guide rail, arranged on the bracket, the pressure chamber cover is slidably arranged on the moving track, and the pressure chamber cover slides relative to the pressure chamber body through the moving guide rail;

[0009] A sample platform, used for placing rock samples, and the sample platform is horizontally fixed inside the pressure chamber cover.

[0010] Further, a moving auxiliary hydraulic cylinder is arranged below one end of the moving guide rail, and the moving auxiliary hydraulic cylinder is fixed on the bracket.

[0011] Further, the pressure chamber cover and the pressure chamber body are hermetically fixedly connected through a flange.

[0012] Further, an electric heating tube is arranged inside the pressure chamber body, and a chamber body temperature sensor is arranged on the other side of the pressure chamber body opposite to the electric heating tube.

[0013] Furthermore, a control mechanism is provided below the pressure chamber body. The control mechanism includes a sample injection control switch, a sample withdrawal control switch, and a core controller. The sample injection control switch and the sample withdrawal control switch are electrically connected to the core controller respectively. The core controller controls the movement of the pressure chamber cover, the temperature inside the pressure chamber body, the pressure inside the pressure chamber body, and the charging and discharging of liquid.

[0014] Furthermore, a liquid charging and discharging mechanism is also provided below the pressure chamber body. The liquid charging and discharging mechanism includes a hydraulic oil tank, an oil filling pump, an oil pumping pump, and a high-pressure electromagnetic reversing valve. The oil filling pump and the oil pumping pump are respectively connected to the high-pressure electromagnetic reversing valve. The hydraulic oil tank is connected to the pressure chamber body through the high-pressure electromagnetic reversing valve and a connecting pipeline.

[0015] Another object of the present invention is to provide a rock sample installation structure for placing the processed rock sample on a sample platform for high-pressure experiments.

[0016] The high-pressure experiment installation structure for rock samples includes an epoxy resin layer, sensors, and a multi-core connector. The rock sample is arranged inside the epoxy resin layer. Embedded drill holes are provided on the surface of the epoxy resin layer. Measuring point embedded parts are placed in the embedded drill holes or sensors are directly placed in them. The measuring point embedded parts are used to place sensors that need to be sealed and isolated. The multi-core connector connects the wires of the sensors and extends to the outside of the pressure chamber cover.

[0017] Furthermore, the sensors include a temperature sensor, an ultrasonic sensor, and a resistance electrode. The temperature sensor and the resistance electrode are arranged inside the measuring point embedded parts, and the ultrasonic sensor is arranged in the embedded drill holes.

[0018] Furthermore, the rock sample installation structure also includes a high-pressure pipeline that penetrates through the measuring point embedded parts and extends deep into the epoxy resin layer.

[0019] In addition, the present invention also discloses a usage method of an intelligent horizontal high-pressure reaction chamber, which completes the experiment on the rock sample through the following steps:

[0020] S1, coating the core sample with epoxy resin;

[0021] S2, opening installation drill holes in the epoxy resin and placing embedded parts in the installation drill holes;

[0022] S3, putting the sensors into the embedded parts and pouring and sealing between the sensors and the embedded parts;

[0023] S4, placing the core sample together with the sensors on the sample platform and connecting each sensor to the outside through a connector;

[0024] S5. Close the pressure chamber cover through the moving guide rail and seal it. Pump in the dielectric oil, set the heating program, and start the experiment.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] Through three parts: the pressure chamber, the pressure chamber support and the movement control, and the pressure chamber temperature loading, the present invention realizes in-situ conditions of high temperature, high pressure and high stress in deep reservoirs inside the chamber. It can arrange experimental devices for simulating the multiphase fluid migration process, and is equipped with a triaxial stress loading system. The overall structure adopts a horizontal structure, realizing the in-situ temperature and pressure conditions of deep reservoirs. At the same time, it can meet the experiments of square / cylindrical rock samples, and can meet different lithology rock samples or spliced rock samples; and can be equipped with an auxiliary device for installing and disassembling experimental rock samples, reducing the manual loading and unloading of rock samples, ensuring the safety of the experiment, and improving the experimental efficiency. Description of the Drawings

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the rock sample installation structure in the present invention. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0030] Refer to Figure 1 As shown, this specific embodiment discloses an intelligent horizontal high-pressure reaction chamber, including

[0031] The bracket 1 is a component used to support other structures. As a preference, in order to enhance the beauty of the equipment and facilitate the installation of operation components, the bracket 1 can be provided with an outer frame body, such as ventilated side plates and cabinet doors, etc., and metal plates can be used to increase the strength.

[0032] The pressure chamber body 2 is horizontally placed on the bracket 1, and its interior is set as a hollow cavity, serving as the cavity for the high-temperature, high-pressure, and high-stress reaction of rock samples. Feasibly, the cavity of the pressure chamber body 2 can be set to have an inner diameter of approximately 440 mm and an inner length of approximately 450 mm, meeting the simulation of 30 cm×30 cm×20 cm three-dimensional large-size rock samples. The design material is selected as 2507 duplex stainless steel, with a maximum working temperature of 160 °C, a maximum working pressure of 90 MPa, a single-side flange, and a horizontal structure. The materials selected for the design of the pressure chamber cavity and flange are 2507 duplex stainless steel, with an allowable stress of 280 MPa at 200 °C, and it is designed for radial sealing, with a sealing surface size of φ440 mm.

[0033] In addition, the pressure chamber body 2 adopts a horizontal structure and is sealed with a flange, meeting the simulation of 30 cm×30 cm×20 cm three-dimensional large-size rock samples, with a maximum working temperature of 160 °C and a maximum working pressure of 90 MPa, realizing the in-situ temperature and pressure conditions of deep reservoirs. At the same time, it can meet the experiments of square / cylindrical rock samples, and different lithology rock samples or spliced rock samples; and it can be equipped with auxiliary devices for the installation and disassembly of experimental rock samples (such as sample installation platforms, moving tracks, hydraulic cylinder moving auxiliary devices, lifting devices, moving trolleys, etc.), reducing the manual loading and unloading of rock samples and ensuring experimental safety.

[0034] In addition, the main body of the pressure chamber meets 30 cm×30 cm×20 cm three-dimensional large-size rock samples, and at the same time can meet the experiments of square / cylindrical rock samples.

[0035] The intelligent horizontal high-pressure reaction chamber further includes a pressure chamber cover 3, which is oppositely arranged with the pressure chamber body 2 on the bracket 1. The pressure chamber body 2 is matched with the pressure chamber cover 3, and a sealed cavity is formed after the pressure chamber cover 3 and the pressure chamber body 2 are closed; preferably, the pressure chamber cover 3 and the pressure chamber body 2 are hermetically fixedly connected through a flange 32.

[0036] Feasibly, the opening and closing of the pressure chamber cover 3 are driven by a moving guide rail 4. The moving guide rail 4 is arranged on the bracket 1. The pressure chamber cover 3 is slidably arranged on the moving track, and the pressure chamber cover 3 slides relative to the pressure chamber body 2 through the moving guide rail 4. The moving guide rail 4 is a linear guide rail. Feasibly, a moving auxiliary hydraulic cylinder 41 is arranged below one end of the moving guide rail 4, and the moving auxiliary hydraulic cylinder 41 is fixed on the bracket 1. The moving auxiliary hydraulic cylinder 41 can adopt a double-acting hydraulic cylinder, and the commutation adjustment is realized through a hydraulic manual commutation valve arranged on the hydraulic pipeline, for opening or closing, and the opening and closing degree can be manually adjusted, or it can automatically run to a fixed position and stop after induction by setting a limit device. A hydraulic cylinder advance and retreat control valve is installed on the front panel of the bracket, and the disassembly and assembly of the sample are realized through a double-acting hydraulic cylinder and a moving guide rail.

[0037] In addition, the device further includes a sample platform 31 for placing rock samples, and the sample platform 31 is horizontally fixed inside the pressure chamber cover 3 in the transverse direction. Specifically, it can be fixed by welding or bolts. The rock sample is placed on the sample platform 31 after being packaged and installed with sensors.

[0038] In addition, an electric heating tube 21 is provided inside the pressure chamber body 2, and a temperature sensor 22 is provided on the other side of the pressure chamber body 2 opposite to the electric heating tube 21. The sample temperature is loaded through the electric heating tube 21. In addition, the programmed heating or cooling of the temperature is controlled by the core controller. The sample inside the pressure chamber is heated by the electric heating tube installed at the bottom, with a maximum heating temperature of 180 °C and a temperature control accuracy of ±0.5 °C. The temperature is measured through a temperature probe, and the temperature is controlled by a PID temperature control instrument. Feasibly, a heat preservation sleeve 24 is further provided outside the pressure chamber body 2 for heat preservation of the chamber 2 to improve temperature stability. And, in order to facilitate the observation of the experimental process, a transparent viewing window 23 can also be provided above the pressure chamber body 2, and an industrial camera 231 can be installed above the transparent viewing window 23. The situation inside the chamber body 2 is photographed through the industrial camera 231, and the experimenter can observe the internal experimental situation through the display device, which is convenient, fast, very safe, and easy to implement.

[0039] In addition, the sample inside the pressure chamber transfers heat through the hydraulic medium loaded by the ring press shaft press. When loading, it is necessary to supplement the hydraulic medium into the cavity, and when unloading the sample, it is necessary to evacuate the hydraulic medium inside the pressure chamber. A hydraulic oil tank, an oil filling pump, an oil pumping pump, and a high-pressure electromagnetic reversing valve are designed at the lower part of the pressure chamber support to realize the automatic filling and extraction of the hydraulic medium for shaft press loading. Specifically, a liquid charging and discharging mechanism 6 is further provided below the pressure chamber body 2. The liquid charging and discharging mechanism 6 includes a hydraulic oil tank 61, an oil filling pump 62, an oil pumping pump 63, and a high-pressure electromagnetic reversing valve 64. The oil filling pump 62 and the oil pumping pump 63 are respectively connected to the high-pressure electromagnetic reversing valve 64, and the hydraulic oil tank 61 is connected to the pressure chamber body 2 through the high-pressure electromagnetic reversing valve 64 and a matching pipeline.

[0040] In addition, a control mechanism 5 is provided below the pressure chamber body 2. The control mechanism 5 includes a sample injection control switch 51, a sample withdrawal control switch 52, and a core controller 53. The sample injection control switch 51 and the sample withdrawal control switch 52 are respectively electrically connected to the core controller 53, and the core controller 53 controls the movement of the pressure chamber cover 3, the temperature inside the pressure chamber body 2, the pressure inside the pressure chamber body 2, and the liquid charging and discharging.

[0041] In addition, in this specific embodiment, refer to Figure 2 , the rock sample can be installed according to the following structure, and after installation, it is placed on the sample platform 31 for high-pressure experiments.

[0042] The high-pressure experimental installation structure of the rock sample includes an epoxy resin layer 7, a sensor 8, and a multi-core connector 9. A rock sample is arranged inside the epoxy resin layer 7. An embedded drilling hole 73 is formed on the surface of the epoxy resin layer 7. The embedded drilling hole 73 is used to place a measuring point embedded part 71 or directly place the sensor 8. The measuring point embedded part 71 is used to place sensors that need to be sealed and isolated. The multi-core connector 9 connects the wires of the sensor 8 and is led to the outside of the pressure chamber cover 3. The connecting wires of the pressure, temperature, resistance, and ultrasonic measuring points arranged inside the sample are led out to the outside of the flange through a special interface on the flange.

[0043] The sensor 8 includes a temperature sensor 81, an ultrasonic sensor 82, and a resistance electrode 83. The temperature sensor 81 and the resistance electrode 83 are arranged inside the measuring point embedded part 71. The ultrasonic sensor 82 is arranged inside the embedded drilling hole 73.

[0044] It further includes a high-pressure pipeline 84. The high-pressure pipeline 84 penetrates through the measuring point embedded part 71 and extends deep into the epoxy resin layer 7.

[0045] More specifically, in terms of the installation structure, pressure, temperature, resistance, and ultrasonic measuring points are designed on the sample, and a well pattern interface is reserved. In the 20 cm height direction of the measuring points, three layers are designed, and the layer spacing is 60 mm.

[0046] The pressure and temperature measuring points are inserted vertically. In the height direction, they are divided into three layers, with a layer spacing of 60 mm. The plane spacing is about 160 mm × 160 mm. The maximum number of measuring points arranged in each layer is 4, and a total of up to 12 measuring points are arranged.

[0047] The resistance and ultrasonic measuring points are arranged around the sample. Four resistance measuring points are arranged on one side, with a spacing of 70 mm. 16 measuring points are arranged in each layer, and a total of 48 measuring points are arranged in three layers. One ultrasonic measuring point is arranged at the center position on one side. The maximum number of measuring points arranged in each layer is 4, and a total of up to 12 measuring points are arranged in three layers.

[0048] All kinds of measuring points are designed with special embedded parts for sealing and isolation between the sensors. The epoxy resin is in direct contact with the embedded parts, and each sensor is not in direct contact with the epoxy resin, and it can be reused multiple times.

[0049] When the sample is a solid sample, the resistance and ultrasonic measuring points only need to be in close contact with the surface of the sample. The temperature and pressure measuring points need to be installed after drilling to the required depth.

[0050] In addition, the well pattern can be installed, poured, and sealed after drilling at the required position according to the experimental requirements. The well pattern is designed with various perforation types (slotted wells and perforated wells), and different specifications of well patterns (such as the width, length, and spacing of slotted wells, and the perforation diameter, density, and spacing of perforated wells) are designed according to the test needs. Different well patterns are installed at the reserved vertical well pattern positions.

[0051] At the same time, sand control units (filter screens) of different specifications can be installed outside the perforations (slits) of the well pattern according to test requirements.

[0052] The resistance and ultrasonic connection lines can be led out through the multi-core connector, equipped with 37-core multi-core connectors, quantity 2. At the same time, it is equipped with sockets and plugs to facilitate the connection and disconnection of test lines and the disassembly and assembly of samples.

[0053] More specifically, the method for using the intelligent horizontal high-pressure reaction chamber in the above embodiment is as follows, and the experiment on the rock sample is completed through the following steps:

[0054] S1, coating the core sample with epoxy resin;

[0055] S2, opening installation holes on the epoxy resin and placing embedded parts in the installation holes;

[0056] S3, placing the sensor into the embedded part, and casting and sealing between the sensor and the embedded part;

[0057] S4, placing the core sample together with the sensors on the sample platform 31, and connecting each sensor to the outside through a connector;

[0058] S5, close the pressure chamber cover 3 and seal it by moving the guide rail 4, pump in the medium oil, set the heating program, and start the experiment.

[0059] The present invention realizes the in-situ conditions of high temperature, high pressure and high stress of deep reservoirs in the pressure chamber through the pressure chamber, the pressure chamber support and the movement control, and the pressure chamber temperature loading. The experimental device for simulating the multiphase fluid migration process can be arranged, and the overall structure adopts a horizontal structure to realize the in-situ temperature and pressure conditions of deep reservoirs. At the same time, it can meet the square / cylindrical rock sample experiments, meet the rock samples of different lithologies or spliced ​​rock samples; and can be equipped with auxiliary devices for installing and disassembling experimental rock samples, reduce the manual loading and unloading of rock samples, ensure the safety of the experiment, and improve the efficiency of the experiment.

[0060] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] In the present invention, unless otherwise clearly specified or defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The above has described in detail the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. An intelligent horizontal high-pressure reaction chamber, characterized in that, including a bracket (1) for serving as a component to support other structures; a pressure chamber body (2) horizontally placed on the bracket (1) in a horizontal position, with its interior set as a hollow cavity, serving as a cavity for high-temperature, high-pressure, and high-stress reactions of rock samples; a pressure chamber cover (3) oppositely arranged on the bracket (1) relative to the pressure chamber body (2), the pressure chamber body (2) matching the pressure chamber cover (3), and a sealed cavity being formed after the pressure chamber cover (3) and the pressure chamber body (2) are closed; a moving guide rail (4) arranged on the bracket (1), the pressure chamber cover (3) being slidably arranged on the moving rail, and the pressure chamber cover (3) sliding relative to the pressure chamber body (2) through the moving guide rail (4); a sample platform (31) for placing rock samples, the sample platform (31) being horizontally fixed transversely on the inner side of the pressure chamber cover (3).

2. An intelligent horizontal high-pressure reaction chamber according to claim 1, characterized in that, A moving auxiliary hydraulic cylinder (41) is arranged below one end of the moving guide rail (4), and the moving auxiliary hydraulic cylinder (41) is fixed on the bracket (1).

3. An intelligent horizontal high-pressure reaction chamber according to claim 1, characterized in that, The pressure chamber cover (3) and the pressure chamber body (2) are hermetically and fixedly connected through a flange (32).

4. An intelligent horizontal high-pressure reaction chamber according to claim 1, characterized in that, An electric heating tube (21) is arranged inside the pressure chamber body (2), and a chamber temperature sensor (22) is arranged on the other side of the pressure chamber body (2) opposite to the electric heating tube (21).

5. An intelligent horizontal high-pressure reaction chamber according to claim 1, characterized in that, A control mechanism (5) is arranged below the pressure chamber body (2), the control mechanism (5) including a sample injection control switch (51), a sample withdrawal control switch (52), and a core controller (53), the sample injection control switch (51) and the sample withdrawal control switch (52) being electrically connected to the core controller (53) respectively, and the core controller (53) controlling the movement of the pressure chamber cover (3), the temperature inside the pressure chamber body (2), and the pressure and liquid charging and discharging inside the pressure chamber body (2).

6. The intelligent horizontal high-pressure reaction chamber according to claim 5, wherein A liquid charging and discharging mechanism (6) is also arranged below the pressure chamber body (2), the liquid charging and discharging mechanism (6) including a hydraulic oil tank (61), an oil filling pump (62), an oil pumping pump (63), and a high-pressure electromagnetic reversing valve (64), the oil filling pump (62) and the oil pumping pump (63) being connected to the high-pressure electromagnetic reversing valve (64) respectively, and the hydraulic oil tank (61) being connected to the pressure chamber body (2) through the high-pressure electromagnetic reversing valve (64) in cooperation with a connecting pipeline.

7. A rock sample installation structure, characterized in that, for placing the processed rock samples on the sample platform (31) for high-pressure experiments; The high-pressure experiment installation structure for rock samples includes an epoxy resin layer (7), a sensor (8), and a multi-core connector (9). The epoxy resin layer (7) contains rock samples, and a pre-buried drilling hole (73) is formed on the surface of the epoxy resin layer (7). The pre-buried drilling hole (73) is used to place a measuring point pre-embedded part (71) or directly place the sensor (8). The measuring point pre-embedded part (71) is used to place sensors that need to be sealed and isolated. The multi-core connector (9) connects the wires of the sensor (8) and leads them to the outside of the pressure chamber cover (3).

8. The rock sample mounting structure according to claim 7, characterized in that, The sensor (8) includes a temperature sensor (81), an ultrasonic sensor (82) and a resistance electrode (83). The temperature sensor (81) and the resistance electrode (83) are arranged in the measuring point embedded part (71), and the ultrasonic sensor (82) is arranged in the embedded drilling hole (73).

9. The installation structure of a rock sample according to claim 7, characterized in that, It further includes a high-pressure pipeline (84), and the high-pressure pipeline (84) penetrates through the measuring point embedded part (71) and extends deep into the epoxy resin layer (7).

10. A method for using an intelligent horizontal high-pressure reaction chamber, characterized in that, The experiment on the rock sample is completed through the following steps: S1, coating the core sample with epoxy resin; S2, drilling an installation hole in the epoxy resin and placing an embedded part in the installation hole; S3, placing the sensor in the embedded part and pouring and sealing between the sensor and the embedded part; S4, placing the core sample together with the sensor on the sample platform (31) and connecting each sensor to the outside through a connector; S5, closing and sealing the pressure chamber cover (3) through the moving guide rail (4), pumping in dielectric oil, setting a heating program, and starting the experiment.

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