A device for online observation of oil and gas in-situ conversion under limited temperature and pressure conditions and a method for using the device

Abstract

The present invention relates to the field of geological exploration technology, specifically to a device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions, including a clamping and transferring assembly, which includes a mechanical arm arranged in the middle of an operating table, a bin body and a bin cover arranged at one end of the mechanical arm, an expansion metal ring is embedded around the top inner circle of the bin body, and an embedding groove is opened around the bottom inner circle of the bin cover. When the bin body and the bin cover clamped together are heated, the expansion metal ring is rapidly expanded by heat and is tightly embedded in the embedding groove, so as to achieve rapid sealing between the bin body and the bin cover. By arranging a sample supply and recovery mechanism, a constant temperature insulation and cleaning mechanism of the sample bin, and an observation microscope around the clamping and transferring assembly, through effective integration, and based on actual geological conditions, the temperature and pressure conditions in the formation are simulated, the purpose of online observation of in-situ conversion of oil and gas is achieved, and important technical support is provided for revealing the evolution mode of deep-ultra-deep oil and gas reservoirs.

Description

Technical Field

[0001] The present invention relates to the technical field of geological exploration, and in particular to a device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions and a method for using the device. Background Art

[0002] As the burial depth increases, the formation temperature and pressure gradually increase, and the phase state of oil and natural gas will gradually change. Especially under the conditions of high temperature and high pressure in deep and ultra-deep layers, oil and natural gas will undergo thermal cracking, resulting in significant changes in their chemical composition and resource quantity. Limited by the current drilling and coring technology, deep and ultra-deep drilling and coring are difficult and costly. Therefore, it is difficult to accurately evaluate the resource type and potential of deep and ultra-deep oil and gas reservoirs through limited geological samples, which poses a great challenge to the deployment of deep and ultra-deep oil and gas exploration.

[0003] Under geological conditions, the transformation pathways and patterns of deep-ultra-deep oil and gas are currently hot topics and frontier areas in the evaluation of oil and gas resources, but they have always faced two difficult problems: First, due to changes in temperature and pressure, the phase of oil and gas samples in underground oil and gas reservoirs changes after being extracted to the surface, and some gaseous hydrocarbons and light hydrocarbon components in the oil and gas will be lost to varying degrees, resulting in the collected samples being difficult to represent the oil and gas components under actual geological temperature and pressure conditions; second, it is difficult to obtain oil and gas samples with the same oil source but different maturity sequences under geological conditions, which brings great challenges to the study of the evolution characteristics of oil and gas components with temperature and pressure changes. The simulation experiment of in-situ transformation of oil and gas under limited temperature and pressure conditions provides an effective way to solve this problem, but there is currently a lack of relevant experimental equipment, making it difficult to observe the in-situ transformation characteristics of oil and gas online. In this context, by developing a device for online observation of in-situ transformation of oil and gas under limited temperature and pressure conditions, it can provide important technical support for the evaluation and prediction of deep-ultra-deep oil and gas resources. Summary of the invention

[0004] In order to solve the problem that geological samples are difficult to accurately represent the oil and gas components in actual underground reservoirs due to the lack of relevant oil and gas in-situ conversion simulation experimental equipment, the present invention provides a device for online observation of oil and gas in-situ conversion under limited temperature and pressure conditions and a method of use thereof to solve the above problem.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for online observation of oil and gas in-situ conversion under limited temperature and pressure conditions, comprising:

[0007] A gripping and transferring assembly, comprising a mechanical arm disposed in the middle of an operating table, a bin body and a bin cover disposed at one end of the mechanical arm, a sapphire wafer disposed inside the bin body and the bin cover, and an inlet and outlet pipe disposed on the side of the bin body;

[0008] Among them, a heating wire is buried inside the warehouse body and connected to a temperature sensor, an expansion metal ring is embedded around the inner circle of the top of the warehouse body, an annular flange is arranged around the outer circle of the top, an embedding groove is opened around the inner circle of the bottom of the warehouse cover, and an annular groove is opened around the outer circle of the bottom;

[0009] When the bin body and bin cover that are clamped together are heated, the expansion metal ring expands rapidly due to the heat and fits tightly into the embedding groove, so that the bin body and bin cover can be quickly separated, thereby achieving rapid sealing between the bin body and bin cover;

[0010] The injection and discharge assembly includes a docking portion provided on one side of the operating table and adapted to the inlet and outlet pipes, a waste liquid recovery portion provided on one side of the docking portion, and an oil supply portion and a gas supply and recovery portion respectively connected to the docking portion;

[0011] The auxiliary component includes an insulated box slidably connected to one side of the operating table, a second waste liquid recovery unit connected to the bottom of the insulated box, a heating nozzle unit disposed inside the insulated box, and an air supply unit and a cleaning liquid supply unit respectively connected to the heating nozzle unit;

[0012] The heating nozzle section is composed of two groups of symmetrical structures on the same straight line, and the nozzles in each group of symmetrical structures are arranged in a facing spraying manner;

[0013] Also included is an observation microscope disposed on the other side of the operating table.

[0014] As a preferred solution of the present invention, the mechanical arm includes a cam divider installed at the lower middle part of the operating table, an electric cylinder 1 installed at the output end of the cam divider, a mounting plate installed at the top of the electric cylinder 1, a linear module installed at the top of the mounting plate, a rotating clamp installed at the top of the slider of the linear module, and a support arm installed parallel to the two claws of the rotating clamp;

[0015] Wherein, a rotating ring is sleeved on the outside of the electric cylinder 1, and the rotating ring is rotatably connected in the operating table. A guide rod is installed in the middle of the bottom of the mounting plate, and the guide rod is slidably fitted on one side of the inner side of the rotating ring;

[0016] The bin body is detachably connected to one end of one of the arms, and the bin cover is detachably connected to one end of the other arm. When the arms are closed, the bin body and the bin cover are aligned and clamped together.

[0017] As a preferred solution of the present invention, a through hole communicating with the inner cavity of the warehouse body is opened inside the inlet and outlet pipe, and the through hole is a structure in which the two ends are thin and the middle section is thick. A plunger is adapted inside the through hole, and a retaining ring is provided at the outer end of the plunger, and a spring is provided on the inner side of the retaining ring. A blind hole is opened inside the plunger, and a through opening is opened on the side of one end of the blind hole close to the inner cavity of the warehouse body.

[0018] As a preferred solution of the present invention, the docking part includes an electric cylinder 2 installed in the middle of one side of the operating table, an injection tube arranged at the top of the telescopic end of the electric cylinder 2, a docking tube connected to one end of the injection tube, a four-way valve connected to the other end of the injection tube, and a pressure gauge connected to the middle of the docking tube;

[0019] The diameter of the butt-joint pipe is consistent with the inner diameter of the port of the inlet and outlet pipe through hole;

[0020] The waste liquid recovery part 1 includes a dumping pool installed at a corner inside the operating table, and the bottom of the dumping pool is connected to a waste liquid tank 1.

[0021] As a preferred solution of the present invention, the oil supply unit includes an oil pump connected to the four-way valve, and the inlet of the oil pump is connected to an oil tank;

[0022] The gas supply and recovery unit comprises an air pump 1 and a vacuum pump respectively connected to the four-way valve, the inlet of the air pump 1 is connected to a gas tank, and the outlet of the vacuum pump is connected to a waste gas tank.

[0023] As a preferred solution of the present invention, the heat preservation box includes a box body, an electric cylinder three installed at the bottom of the box body, an electric cylinder four installed at one side of the box body, and a box cover matched with the top of the box body;

[0024] The box body is slidably connected to one side of the operating table, the electric cylinder 3 is installed on the side of the operating table, the telescopic end of the electric cylinder 4 is connected to the box cover, and a notch for accommodating the support arm is opened at the bottom of one side of the box cover;

[0025] The second waste liquid recovery part includes a second waste liquid tank connected to one side of the bottom of the box body.

[0026] As a preferred solution of the present invention, the heating nozzle part includes a three-way pipe slidably connected to the middle of the bottom of the box body, the three-way pipe is a T-shaped structure, the bottom of which is correspondingly fixed to the side of the operating table, and the bottom of which is connected to a three-way valve;

[0027] Among them, a pair of winding pipes are connected to both sides of the top of the three-way pipe, and each pair of winding pipes are arranged in a spray-to-spray manner to form two groups of symmetrical structures. The outside of the winding pipes is provided with an electromagnetic heating induction coil.

[0028] As a preferred solution of the present invention, the air supply unit includes an air pump 2 connected to the three-way valve;

[0029] Wherein, the height of the highest point of the connecting pipe between the air pump two-way valve and the three-way valve is greater than the height of the bypass nozzle;

[0030] The cleaning liquid supply unit comprises a water pump connected to a three-way valve, and an inlet of the water pump is connected to a water tank.

[0031] A method for using a device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions comprises the following steps:

[0032] Step 1: The support arms are closed so that the bin cover and the bin body are buckled together, and at the same time, the electric heating wire is controlled to work, and the expansion metal ring is heated to expand rapidly and fit tightly into the embedding groove, so as to achieve rapid sealing between the bin body and the bin cover, thereby forming a sample bin;

[0033] Step 2: Control the robot arm to transfer the sample bin to the docking part and align the inlet and outlet pipes with the docking pipe, then the electric cylinder 2 moves to push the docking pipe into the inlet and outlet pipes, so that the injection tube is connected to the inside of the sample bin, the vacuum pump works to evacuate the inside of the sample bin, and the waste gas enters the waste gas tank for storage, and then the four-way valve is controlled to fill the oil sample in the oil tank into the sample bin through the oil pump, and the four-way valve is controlled again to connect the air pump 1 to the sample bin, and fill the set gas stored in the air tank into the sample bin, and then the four-way valve is closed, the electric heating wire is heated to heat the sample bin to the set temperature, and then the internal pressure of the pressure gauge detection system is observed;

[0034] Step 3: The sample chamber is transferred to the inside of the incubator by the robot arm, and the temperature in the incubator is raised and maintained at a constant temperature by the air pump 2, the winding pipe and the electromagnetic heating induction coil. The constant temperature is monitored by the temperature sensor, so that the sample chamber is stable under the specified temperature and pressure conditions for 6 hours;

[0035] Step 4: The sample chamber is transferred to the observation microscope stage by the robotic arm, and the spectral information of the oil and gas in the sample chamber is directly measured in real time, including Raman spectrum and fluorescence spectrum. The sample chamber is put into the incubator again by the rotation of the robotic arm, and then the temperature is continuously raised to the next temperature point. After stabilization for 6 hours, the converted oil and gas spectral information is observed again, and so on, until the oil and gas observation at the set temperature point is completed;

[0036] Step 5: Repeat the docking action of step 2 to connect the injection tube to the inside of the sample chamber again, and operate the vacuum pump to evacuate the inside of the sample chamber, and store the gas phase of the sample in the waste gas tank. Then release the docking state, transfer the sample chamber to the top of the dumping pool, rotate the sample chamber and open it, so that the liquid phase of the sample flows into the dumping pool and is recovered by the waste liquid tank.

[0037] Step six, separate the bin body and bin cover and place them respectively at two sets of spray windings in the insulation box, and inject high-pressure and high-temperature cleaning liquid through the water pump and electromagnetic heating induction coil to achieve rapid and thorough cleaning of the bin body and bin cover, and then control the three-way valve to connect the air pump to the insulation box, and inject high-pressure and high-temperature gas under the action of the electromagnetic heating induction coil to achieve drying of the bin body and bin cover.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention arranges the sample supply and recovery mechanism, the constant temperature insulation and cleaning mechanism of the sample bin, and the observation microscope around the clamping and transferring assembly, so that the sample bin can be quickly transferred between the three. By effectively integrating the various components, the inconvenience of manual operation is avoided. At the same time, by setting the same temperature and pressure conditions as those in the formation evolution process, the simulation of the entire oil and gas evolution process can be achieved, providing important technical support for revealing the evolution model of deep-ultra-deep oil and gas reservoirs.

[0040] The present invention heats the bin body so that the expanding metal ring expands rapidly due to the heat and fits tightly into the embedding groove, thereby achieving rapid sealing between the bin body and the bin cover while achieving the purpose of rapid separation. This closed sample bin can not only withstand the overpressure generated during the simulation process, but also improve the efficiency of sample loading and sampling.

[0041] The injection and recovery of samples in the present invention share the same structure, realizing the integration of the equipment, thereby simplifying the complexity of the device structure and facilitating maintenance. The integrated auxiliary constant temperature heating structure and cleaning structure can not only ensure the set temperature conditions, but also help to efficiently clean the sample chamber after simulation, thereby improving the accuracy of the simulation experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0043] Figure 2 It is a schematic diagram of the assembly of the clamping and transferring assembly of the present invention;

[0044] Figure 3 It is a schematic diagram of the structure of the clamping transfer assembly of the present invention;

[0045] Figure 4 It is a schematic diagram of the structure of the bin body and bin cover of the present invention;

[0046] Figure 5 for Figure 4 Another perspective diagram of the structure;

[0047] Figure 6 It is a schematic diagram of the internal structure of the inlet and outlet pipes of the present invention;

[0048] Figure 7 It is a schematic diagram of the structure of the injection and discharge assembly of the present invention;

[0049] Figure 8 for Figure 7 Another perspective diagram of the structure;

[0050] Fig. 9 for Figure 8 The enlarged view of point A in the middle;

[0051] Fig.10 It is a schematic diagram of the assembly of the auxiliary components of the present invention;

[0052] Fig.11 It is a schematic diagram of the auxiliary component structure of the present invention;

[0053] Fig.12 It is a schematic diagram of the internal structure of the box of the present invention;

[0054] Fig.13 for Fig.12 Schematic diagram of the structure in the figure.

[0055] Among them, 1. Clamping and transfer assembly; 101. Cam divider; 102. Electric cylinder 1; 103. Swivel; 104. Mounting plate; 105. Guide rod; 106. Linear module; 107. Rotating clamp; 108. Support arm; 109. Bin; 110. Bin cover; 111. Sapphire wafer; 112. Expanded metal ring; 113. Annular flange; 114. Embedded groove; 115. Ring groove; 116. Inlet and outlet pipe; 117. Plunger; 118. Spring; 119. Temperature sensor; 2. Injection and discharge assembly; 201. Dumping tank; 202. Waste liquid tank 1; 203, oil tank; 204, oil pump; 205, gas tank; 206, air pump 1; 207, waste gas tank; 208, vacuum pump; 209, injection tube; 210, docking tube; 211, four-way valve; 212, electric cylinder 2; 3, auxiliary components; 301, box body; 302, box cover; 303, electric cylinder 3; 304, electric cylinder 4; 305, notch; 306, three-way pipe; 307, winding pipe; 308, electromagnetic heating induction coil; 309, three-way valve; 310, air pump 2; 311, water pump; 312, water tank; 313, waste liquid tank 2. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0057] like Figure 1 As shown, an embodiment of the present invention provides a device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions, including a clamping transfer component 1.

[0058] In this embodiment, reference Figure 2-Figure 6It includes a robotic arm arranged in the middle of the operating table, a bin body 109 and a bin cover 110 arranged at one end of the robotic arm, a sapphire wafer 111 arranged inside the bin body 109 and the bin cover 110 respectively, and an inlet and outlet pipe 116 arranged on the side of the bin body 109.

[0059] Among them, an electric heating wire is buried inside the warehouse body 109 and is connected to a temperature sensor 119. An expansion metal ring 112 is embedded around the top inner circle of the warehouse body 109, and an annular flange 113 is provided around the top outer circle. An embedding groove 114 is opened around the bottom inner circle of the warehouse cover 110, and an annular groove 115 is opened around the bottom outer circle.

[0060] When the chamber body 109 and the chamber cover 110 clamped together are heated, the expandable metal ring 112 expands rapidly due to the heat and fits tightly into the embedding groove 114, thereby achieving a rapid seal between the chamber body 109 and the chamber cover 110 while achieving the purpose of rapid separation, thereby combining into a sample chamber.

[0061] In this embodiment, the above-mentioned sealing method is adopted to solve the problem that the existing observation container cannot quickly expose the inner cavity, which makes it difficult to clean the interior, thereby causing cross contamination of samples and causing great inconvenience to the maintenance of the container.

[0062] The robotic arm includes a cam divider 101 installed at the lower middle part of the operating table, an electric cylinder 102 installed at the output end of the cam divider 101, a mounting plate 104 installed at the top of the electric cylinder 102, a linear module 106 installed at the top of the mounting plate 104, a rotating clamp 107 installed at the top of the slider of the linear module 106, and a support arm 108 installed parallel to the two claws of the rotating clamp 107.

[0063] In this embodiment, the cam divider 101 is used to rotate the sample bin in the horizontal plane, the electric cylinder 102 is used to lift the sample bin, the linear module 106 is used to change the distance of the sample bin from the origin point in the horizontal plane, and the rotating clamp 107 is used to clamp the bin body 109 and the bin cover 110 to form a sample bin. At the same time, the rotating function enables the sample bin to rotate in the vertical plane, which is convenient for pouring liquid samples and subsequent cleaning.

[0064] In this embodiment, the temperature sensor 119 includes a temperature sensing probe installed inside the bin body 109 and a temperature display installed on the support arm 108 .

[0065] The outer part of the electric cylinder 102 is provided with a swivel 103 , which is rotatably connected in the operating table. A guide rod 105 is installed in the middle of the bottom of the mounting plate 104 , and the guide rod 105 is slidably fitted on one side of the inner part of the swivel 103 .

[0066] The bin body 109 is detachably connected to one end of one arm 108 , and the bin cover 110 is detachably connected to one end of the other arm 108 . When the arms 108 are closed, the bin body 109 and the bin cover 110 are aligned and clamped together.

[0067] A through hole is opened inside the inlet and outlet pipe 116 and communicated with the inner cavity of the warehouse body 109. The through hole has a structure in which the two ends are thin and the middle section is thick. A plunger 117 is adapted inside the through hole. A retaining ring is provided at the outer end of the plunger 117, and a spring 118 is sleeved on the inner side of the retaining ring. A blind hole is opened inside the plunger 117, and a through opening is opened on the side of one end of the blind hole close to the inner cavity of the warehouse body 109.

[0068] In this embodiment, reference Figure 7-Figure 9 The injection and discharge assembly 2 includes a docking portion arranged on one side of the operating table and adapted to the inlet and outlet pipes 116, a waste liquid recovery portion arranged on one side of the docking portion, and an oil supply portion and a gas supply and recovery portion respectively connected to the docking portion.

[0069] The docking part includes an electric cylinder 212 installed in the middle of one side of the operating table, an injection tube 209 arranged at the top of the telescopic end of the electric cylinder 212, a docking tube 210 connected to one end of the injection tube 209, a four-way valve 211 connected to the other end of the injection tube 209, and a pressure gauge connected to the middle of the docking tube 210.

[0070] The diameter of the butt joint pipe 210 is consistent with the inner diameter of the port of the through hole of the inlet and outlet pipe 116 .

[0071] The waste liquid recovery unit 1 includes a dumping pool 201 installed at a corner inside the operating table, and the bottom of the dumping pool 201 is connected to a waste liquid tank 202.

[0072] The oil supply unit includes an oil pump 204 connected to the four-way valve 211 , and an inlet of the oil pump 204 is connected to an oil tank 203 .

[0073] The gas supply and recovery unit includes an air pump 206 and a vacuum pump 208 respectively connected to the four-way valve 211 . The inlet of the air pump 206 is connected to the gas tank 205 , and the outlet of the vacuum pump 208 is connected to the waste gas tank 207 .

[0074] In this embodiment, the injection and recovery operations of the sample largely share the same set of structures, thereby simplifying the complexity of the device structure and facilitating maintenance. At the same time, while facilitating sample recovery, it also avoids leakage of oil and gas samples, which is beneficial to environmental protection.

[0075] In this embodiment, reference Figure 10-13The auxiliary component 3 includes an insulated box slidably connected to one side of the operating table, a waste liquid recovery part 2 connected to the bottom of the insulated box, a heating nozzle part arranged inside the insulated box, and an air supply part and a cleaning liquid supply part respectively connected to the heating nozzle part.

[0076] The heating nozzle section is composed of two groups of symmetrical structures on the same straight line, and the nozzles in each group of symmetrical structures are arranged in a facing spraying manner.

[0077] The heat preservation box includes a box body 301, an electric cylinder 303 installed at the bottom of the box body 301, an electric cylinder 4 304 installed at one side of the box body 301, and a box cover 302 matched with the top of the box body 301.

[0078] Among them, the box body 301 is slidably connected to one side of the operating table, the electric cylinder three 303 is installed on the side of the operating table, the telescopic end of the electric cylinder four 304 is connected to the box cover 302, and a notch 305 for accommodating the support arm 108 is opened at the bottom of one side of the box cover 302.

[0079] The second waste liquid recovery unit includes a second waste liquid tank 313 connected to one side of the bottom of the box body 301.

[0080] The heating nozzle part includes a three-way pipe 306 slidably connected to the middle of the bottom of the box body 301. The three-way pipe 306 is a T-shaped structure, the lower part of which is fixed to the side of the operating table, and the bottom of which is connected to a three-way valve 309.

[0081] Among them, a pair of winding pipes 307 are connected to both sides of the top of the three-way pipe 306, and each pair of winding pipes 307 are arranged in a spray-to-spray manner to form two groups of symmetrical structures. The outside of the winding pipes 307 is provided with an electromagnetic heating induction coil 308.

[0082] The air supply unit includes an air pump 310 connected to the three-way valve 309 .

[0083] The highest point of the connecting pipe between the air pump 2 310 and the three-way valve 309 is higher than the height of the nozzle of the bypass pipe 307 .

[0084] The cleaning liquid supply unit includes a water pump 311 connected to the three-way valve 309 , and an inlet of the water pump 311 is connected to a water tank 312 .

[0085] Similarly, in this embodiment, the auxiliary constant temperature heating structure and the cleaning structure largely share a set of structures, which not only simplifies the structure but also improves the efficiency of conversion between functions.

[0086] Also included is an observation microscope disposed on the other side of the operating table.

[0087] Furthermore, this embodiment also provides a method for using a device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions, comprising the following steps:

[0088] Step 1: Close the support arm 108 so that the chamber cover 110 and the chamber body 109 are interlocked, and at the same time, control the heating wire to work, heat the expansion metal ring 112 so that it expands rapidly and fits tightly into the embedding groove 114, thereby achieving rapid sealing between the chamber body 109 and the chamber cover 110 to form a sample chamber.

[0089] Step 2: Control the robot arm to transfer the sample bin to the docking portion and align the inlet and outlet pipe 116 with the docking pipe 210, and then the electric cylinder 212 is actuated to push the docking pipe 210 into the inlet and outlet pipe 116, so that the injection tube 209 is connected to the inside of the sample bin, and the vacuum pump works to evacuate the inside of the sample bin, and the waste gas enters the waste gas tank 207 for storage, and then the four-way valve 211 is controlled to fill the oil sample in the oil tank 203 into the sample bin through the oil pump 204, and the four-way valve 211 is controlled again to connect the air pump 206 to the sample bin, and fill the set gas stored in the air tank 205 into the sample bin, and then the four-way valve 211 is closed, and the heating wire is heated to heat the sample bin to the set temperature, and then the internal pressure of the pressure gauge detection system is observed.

[0090] Step 3: Use the robot arm to transfer the sample chamber to the inside of the incubator. Through the action of air pump 2 310, winding tube 307 and electromagnetic heating induction coil 308, the temperature in the incubator is raised and maintained at a constant temperature. The constant temperature is monitored by temperature sensor 119 so that the sample chamber can be stabilized under the specified temperature and pressure conditions for 6 hours.

[0091] Step 4: Use the robotic arm to transfer the sample chamber to the observation microscope stage, and directly measure the spectral information of the oil and gas in the sample chamber in real time, including Raman spectrum and fluorescence spectrum. The robotic arm rotates to allow the sample chamber to enter the incubator again, and then continue to heat up to the next temperature point. After stabilizing for 6 hours, observe the converted oil and gas spectral information again, and so on, until the oil and gas observation at the set temperature point is completed.

[0092] Step 5. Repeat the docking action of step 2 to connect the injection tube 209 to the interior of the sample chamber again. The vacuum pump operates to evacuate the interior of the sample chamber, and the gas phase of the sample enters the waste gas tank 207 for storage. Then the docking state is released, and the sample chamber is transferred to the top of the dumping pool 201. The sample chamber is rotated and opened, so that the liquid phase of the sample flows into the interior of the dumping pool 201 and is recovered by the waste liquid tank 202.

[0093] Step six, separate the bin body 109 and the bin cover 110 and place them respectively at two sets of opposing spray winding pipes 307 in the heat preservation box, and inject high-pressure and high-temperature cleaning liquid through the water pump 311 and the electromagnetic heating induction coil 308, so as to achieve rapid and thorough cleaning of the bin body 109 and the bin cover 110, and then control the three-way valve 309 to connect the air pump 2 310 to the heat preservation box, and inject high-pressure and high-temperature gas under the action of the electromagnetic heating induction coil 308, so as to achieve drying of the bin body 109 and the bin cover 110.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions, comprising a clamping and transfer component (1), an injection and discharge component (2) and an auxiliary component (3), characterized in that: The gripping and transferring assembly (1) comprises a mechanical arm arranged in the middle of an operating table, a bin body (109) and a bin cover (110) arranged at one end of the mechanical arm, a sapphire wafer (111) arranged inside the bin body (109) and the bin cover (110), and an inlet and outlet pipe (116) arranged on a side of the bin body (109); A heating wire is embedded inside the bin body (109) and is connected to a temperature sensor (119); an expansion metal ring (112) is embedded around the inner circle of the top of the bin body (109); an annular flange (113) is provided around the outer circle of the top; an embedding groove (114) is provided around the inner circle of the bottom of the bin cover (110); and an annular groove (115) is provided around the outer circle of the bottom; When the bin body (109) and the bin cover (110) that are clamped together are heated, the expansion metal ring (112) expands rapidly due to the heat and fits tightly into the embedding groove (114), thereby achieving a rapid seal between the bin body (109) and the bin cover (110) while enabling the bin body (109) and the bin cover (110) to be quickly separated; The injection and discharge assembly (2) comprises a docking portion provided on one side of the operating table and adapted to the inlet and outlet pipes (116), a waste liquid recovery portion provided on one side of the docking portion, and an oil supply portion and a gas supply and recovery portion respectively connected to the docking portion; The auxiliary component (3) comprises an insulated box slidably connected to one side of the operating table, a second waste liquid recovery unit connected to the bottom of the insulated box, a heating nozzle unit arranged inside the insulated box, and an air supply unit and a cleaning liquid supply unit respectively connected to the heating nozzle unit; The heating nozzle section is composed of two groups of symmetrical structures on the same straight line, and the nozzles in each group of symmetrical structures are arranged in a facing spraying manner; Also included is an observation microscope located on the other side of the operating table; The mechanical arm comprises a cam divider (101) mounted below the middle of the operating table, an electric cylinder (102) mounted at the output end of the cam divider (101), a mounting plate (104) mounted at the top of the electric cylinder (102), a linear module (106) mounted at the top of the mounting plate (104), a rotating clamp (107) mounted at the top of a slider of the linear module (106), and a support arm (108) mounted parallel to two claws of the rotating clamp (107); The outer part of the electric cylinder (102) is provided with a rotating ring (103), the rotating ring (103) is rotatably connected in the operating table, a guide rod (105) is installed in the middle of the bottom of the mounting plate (104), and the guide rod (105) is slidably fitted on one side of the inner part of the rotating ring (103); The bin body (109) is detachably connected to one end of one of the supporting arms (108), and the bin cover (110) is detachably connected to one end of another of the supporting arms (108); when the supporting arms (108) are closed, the bin body (109) and the bin cover (110) are aligned and clamped together; A through hole communicating with the inner cavity of the bin body (109) is provided inside the inlet and outlet pipe (116), the through hole being of a structural form with thin ends at two ends and a thick middle section, a plunger (117) is adapted inside the through hole, a retaining ring is provided at the outer end of the plunger (117), and a spring (118) is sleeved on the inner side of the retaining ring outside the plunger (117), a blind hole is provided inside the plunger (117), and a through opening is provided on the side surface of one end of the blind hole close to the inner cavity of the bin body (109).

2. The device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions according to claim 1, characterized in that: The docking portion comprises an electric cylinder 2 (212) installed in the middle of one side of the operating table, an injection tube (209) arranged at the top of the telescopic end of the electric cylinder 2 (212), a docking tube (210) connected to one end of the injection tube (209), a four-way valve (211) connected to the other end of the injection tube (209), and a pressure gauge connected to the middle of the docking tube (210); The diameter of the butt-joint pipe (210) is consistent with the inner diameter of the port through hole of the inlet and outlet pipe (116); The waste liquid recovery unit 1 comprises a dumping pool (201) installed at a corner inside the operating table, and the bottom of the dumping pool (201) is connected to a waste liquid tank 1 (202).

3. The device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions according to claim 2, characterized in that: The oil supply unit comprises an oil pump (204) connected to a four-way valve (211), and an inlet of the oil pump (204) is connected to an oil tank (203); The gas supply and recovery unit comprises an air pump (206) and a vacuum pump (208) respectively connected to a four-way valve (211); the inlet of the air pump (206) is connected to a gas tank (205); and the outlet of the vacuum pump (208) is connected to a waste gas tank (207).

4. The device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions according to claim 3 is characterized by: The heat preservation box comprises a box body (301), an electric cylinder three (303) installed at the bottom of the box body (301), an electric cylinder four (304) installed at one side of the box body (301), and a box cover (302) matched with the top of the box body (301); The box body (301) is slidably connected to one side of the operating table, the electric cylinder three (303) is installed on the side of the operating table, the telescopic end of the electric cylinder four (304) is connected to the box cover (302), and a notch (305) for accommodating the support arm (108) is provided at the bottom of one side of the box cover (302); The second waste liquid recovery unit comprises a second waste liquid tank (313) connected to one side of the bottom of the box body (301).

5. The device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions according to claim 4, characterized in that: The heating nozzle section comprises a three-way pipe (306) slidably connected to the middle of the bottom of the box body (301); the three-way pipe (306) is in a T-shaped structure, the bottom of which is fixed to the side of the operating table, and the bottom of which is connected to a three-way valve (309); Wherein, a pair of winding pipes (307) are connected to both sides of the top of the three-way pipe (306), and each pair of winding pipes (307) are arranged in a spray-to-spray manner to form two groups of symmetrical structures, and the outside of the winding pipes (307) are each provided with an electromagnetic heating induction coil (308).

6. The device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions according to claim 5, characterized in that: The air supply unit comprises an air pump 2 (310) connected to the three-way valve (309); The highest point of the connecting pipe between the second air pump (310) and the three-way valve (309) is higher than the height of the nozzle of the winding pipe (307); The cleaning liquid supply unit comprises a water pump (311) connected to a three-way valve (309), and an inlet of the water pump (311) is connected to a water tank (312).

7. The method for using the device for online observation of in-situ conversion of oil and gas under limited temperature and pressure conditions according to claim 6 is characterized by: The following steps are involved: Step 1: The support arm (108) is closed so that the chamber cover (110) and the chamber body (109) are buckled together, and at the same time, the electric heating wire is controlled to work, heating so that the expansion metal ring (112) is heated to expand rapidly and fit tightly into the embedding groove (114), thereby achieving rapid sealing between the chamber body (109) and the chamber cover (110), thereby forming a sample chamber; Step 2: Control the robot arm to transfer the sample bin to the docking portion and align the inlet and outlet pipe (116) with the docking pipe (210), and then the electric cylinder 2 (212) moves to push the docking pipe (210) into the inlet and outlet pipe (116), so that the injection tube (209) is connected to the inside of the sample bin, and the vacuum pump works to evacuate the inside of the sample bin, and the waste gas enters the waste gas tank (207) for storage, and then the four-way valve (211) is controlled to charge the oil sample in the oil tank (203) into the sample bin through the oil pump (204), and the four-way valve (211) is controlled again to connect the air pump 1 (206) to the sample bin, and charge the set gas stored in the air tank (205) into the inside of the sample bin, and then the four-way valve (211) is closed, and the electric heating wire is heated to heat the sample bin to the set temperature, and then the internal pressure of the pressure gauge detection system is observed; Step 3: The sample chamber is transferred to the interior of the incubator by means of a robotic arm, and the temperature in the incubator is raised and maintained at a constant temperature by means of the second air pump (310), the winding tube (307) and the electromagnetic heating induction coil (308), and the constant temperature is monitored by means of a temperature sensor (119) so that the sample chamber is stabilized under the specified temperature and pressure conditions for 6 hours; Step 4: The sample chamber is transferred to the observation microscope stage by the robotic arm, and the spectral information of the oil and gas in the sample chamber is directly measured in real time, including Raman spectrum and fluorescence spectrum. The sample chamber is put into the incubator again by the rotation of the robotic arm, and then the temperature is continuously raised to the next temperature point. After stabilization for 6 hours, the converted oil and gas spectral information is observed again, and so on, until the oil and gas observation at the set temperature point is completed; Step 5, repeat the docking action of step 2, so that the injection tube (209) is connected to the inside of the sample chamber again, the vacuum pump is operated to evacuate the inside of the sample chamber, and the gas phase of the sample enters the waste gas tank (207) for storage, and then the docking state is released, the sample chamber is transferred to the top of the dumping pool (201), the sample chamber is rotated and opened, so that the liquid phase of the sample flows into the dumping pool (201) and is recovered by the waste liquid tank (202); Step 6: After the bin body (109) and bin cover (110) are separated, they are placed in two sets of oppositely sprayed winding pipes (307) in the heat preservation box, and high-pressure and high-temperature cleaning liquid is injected through the water pump (311) and the electromagnetic heating induction coil (308), so as to achieve rapid and thorough cleaning of the bin body (109) and the bin cover (110), and then the three-way valve (309) is controlled so that the air pump 2 (310) is connected to the heat preservation box, and high-pressure and high-temperature gas is injected under the action of the electromagnetic heating induction coil (308), so as to achieve drying of the bin body (109) and the bin cover (110).

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