Oil-containing rock sample batch freezing device, analysis system and analysis method

Abstract

The invention relates to an oil-containing rock sample batch freezing device, an analysis system and an analysis method, and relates to the technical field of oil exploration. A plurality of samples can be placed on the sample plate provided with the plurality of sample cavities at a time, and the sample plate can be quickly frozen by introducing the refrigerating fluid into the first flow channel in the sample plate, so that low-temperature storage of all the samples is realized. The heat preservation box is of a split structure, the heat preservation box is kept in a closed state when the samples do not need to be taken, and the heat preservation box is temporarily opened under the action of the driving mechanism when the samples need to be taken, so that the samples are always in a low-temperature state, and the analysis result is prevented from being influenced by loss of light hydrocarbon components. The oil-containing rock sample batch freezing device is arranged on the pyrolysis instrument, the manipulator of the pyrolysis instrument can grab samples in the sample cavity nearby and send the samples to the detection mechanism for analysis, the time for exposing the samples in the air is short, the analysis efficiency is high, and the result is accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum exploration, and in particular to a batch freezing device, an analysis system and an analysis method for oil-containing rock samples. Background Art

[0002] Pyrolysis analysis is a key analytical method for evaluating the free hydrocarbon content and source quality in shale oil reservoirs. As shale oil exploration focuses on shale formations in medium- to high-maturity zones, shale oil is primarily composed of light oil or even condensate, with a high content of light hydrocarbon components. However, these components are highly volatile and dissipate at room temperature. Consequently, in recent years, the field of petroleum geology has established a technique for analyzing the oil content of shale samples using pyrolysis. This technique significantly reduces the loss of light hydrocarbon components and ensures the representativeness and rationality of the oil content evaluation results. However, this method can only crush and analyze one sample at a time, making batch analysis inefficient and unable to meet the fast-paced demands of shale oil exploration sites. Therefore, the development of an ultra-low temperature sample freezing device, which enables batch sample analysis, can provide analytical data to the oil field more quickly and meet the fast-paced demands of shale oil exploration sites. Summary of the Invention

[0003] The present invention provides a batch freezing device, analysis system and analysis method for oil-bearing rock samples, which can realize batch analysis of samples, provide analysis data for oil fields more quickly, and meet the fast-paced requirements of shale oil exploration sites.

[0004] On the one hand, the present invention provides a batch freezing device for oil-containing rock samples, comprising a base, a sample plate, an insulation box and a driving mechanism, wherein the sample plate and the insulation box are both arranged on the base, the sample plate is provided with a plurality of sample cavities for placing samples, and a first flow channel for the flow of refrigerant is provided inside the sample plate, the insulation box comprises a fixed part fixed on the base and a sliding part slidably arranged on the base, the driving mechanism is connected to the sliding part, and the driving mechanism connects or separates the sliding part from the fixed part to seal or expose the sample plate.

[0005] In one embodiment, a through hole for the protective gas to pass through is opened on the fixing portion or the sliding portion.

[0006] In one embodiment, a second flow channel communicating with the first flow channel is provided inside the fixing portion, and a refrigerant liquid inlet joint and a refrigerant liquid outlet joint communicating with the second flow channel are provided on the surface of the fixing portion.

[0007] In one embodiment, the sliding portion includes a top plate, a back plate, and two oppositely disposed side plates, wherein the top plate is disposed opposite to the base and spaced apart from the sample plate, and the back plate is disposed opposite to the fixing portion.

[0008] In one embodiment, a guide groove is provided on the base, and the bottom of the side plate is arranged in the guide groove.

[0009] In one embodiment, the driving mechanism includes a driving member and a connecting member provided on the driving member, wherein the connecting member is connected to the sliding portion to enable the sliding portion to reciprocate.

[0010] On the other hand, a batch analysis system for oil-bearing rock samples is provided, comprising a pyrolyzer provided with a batch freezing device for oil-bearing rock samples according to any one of the above-mentioned embodiments.

[0011] In one embodiment, the pyrolyzer includes a manipulator, a detection mechanism and a controller. The manipulator, the oil-containing rock sample batch freezing device and the detection mechanism are all connected to the controller. The manipulator is used to grab the sample in the sample cavity and send it to the detection mechanism for analysis.

[0012] In addition, a method for batch analysis of oil-bearing rock samples is provided, comprising the following steps:

[0013] S1, causing the driving mechanism to open the heat preservation box to expose the sample plate, placing the sample into the sample chamber, closing the heat preservation box, and passing a freezing liquid into the sample plate to freeze the sample;

[0014] S2, moving the manipulator to the top of the heat preservation box, the driving mechanism opens the heat preservation box, and after the manipulator grabs the sample, the driving mechanism closes the heat preservation box;

[0015] S3, the manipulator sends the sample to the testing agency for analysis, and the manipulator resets;

[0016] S4. Repeat steps S2 and S3 until all samples are analyzed.

[0017] In one embodiment, in steps S1 and S2, when the heat preservation box is closed, protective gas is introduced into the interior of the heat preservation box.

[0018] Compared with the prior art, the advantage of the present invention is that a sample plate with multiple sample cavities can hold multiple samples at one time, and by introducing a freezing liquid into the first flow channel in the sample plate, the sample plate can be quickly frozen, thereby achieving low-temperature preservation of all samples. The insulation box adopts a split structure. When it is not necessary to take samples, the insulation box remains closed. When it is necessary to take samples, the insulation box will be temporarily opened under the action of a driving mechanism, thereby ensuring that the samples are always in a low-temperature state, avoiding the loss of light hydrocarbon components and affecting the analysis results. The oil-bearing rock sample batch freezing device of the present invention is arranged on a pyrolyzer. The manipulator of the pyrolyzer can grab the samples in the sample cavity nearby and send them to the detection mechanism for analysis. The sample is exposed to the air for a short time, the analysis efficiency is high, and the results are accurate. Batch analysis of samples can be achieved, and analysis data can be provided to the oil field more quickly, meeting the fast-paced requirements of shale oil exploration sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings.

[0020] Figure 1 Schematic diagram of a batch freezing device for oil-bearing rock samples when the heat preservation box is closed according to an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of a batch freezing device for oil-bearing rock samples when the heat preservation box is opened in an embodiment of the present invention;

[0022] Figure 3 2 is a schematic diagram of the first flow channel structure of the sample plate in an embodiment of the present invention;

[0023] Figure 4 2 is a schematic structural diagram of a batch analysis system for oil-bearing rock samples according to an embodiment of the present invention;

[0024] Figure 5 4 is a flow chart of a method for batch analysis of oil-bearing rock samples in an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. Batch freezing device for oil-bearing rock samples; 11. Base; 111. Guide groove; 12. Sample plate; 121. Sample cavity; 122. First flow channel; 13. Insulation box; 131. Fixing portion; 1311. Through hole; 132. Sliding portion; 1321. Top plate; 1322. Side plate; 133. Refrigerant inlet connector; 134. Refrigerant outlet connector; 14. Driving mechanism; 141. Driving part; 142. Connecting part; 15. Solenoid valve; 2. Pyrolyzer; 21. Manipulator; 22. Detection mechanism; 23. Guide rail; 24. First sensor; 25. Second sensor. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, the oil-bearing rock sample batch freezing device 1 according to an embodiment of the present invention comprises a base 11, a sample plate 12, a heat preservation box 13 and a driving mechanism 14. The sample plate 12 and the heat preservation box 13 are both arranged on the base 11. The sample plate 12 is provided with a plurality of sample cavities 121 for placing samples. Figure 3 As shown, the sample plate 12 is provided with a first flow channel 122 for the flow of refrigerant. The first flow channel 122 is zigzag-shaped within the sample plate 12, extending long and passing past all sample cavities 121 to rapidly cool the sample plate 12. The thermal insulation box 13 includes a fixed portion 131 secured to the base 11 and a sliding portion 132 slidably disposed on the base 11. A drive mechanism 14 is connected to the sliding portion 132, which connects and disconnects the sliding portion 132 from the fixed portion 131 to seal or expose the sample plate 12.

[0030] The freezing liquid can be alcohol, antifreeze or other types of liquids. Since the boiling point of propane is minus 42°C, the freezing liquid should at least keep the temperature of the sample plate 12 below minus 42°C to prevent propane and alkanes with a larger number of carbon atoms from volatilizing and dissipating.

[0031] The sample plate 12, equipped with multiple sample cavities 121, can hold multiple samples at once. By introducing a refrigerant into the first flow channel 122 within the sample plate 12, the sample plate 12 can be rapidly frozen, achieving cryogenic storage of all samples. The thermal insulation box 13 utilizes a split structure. When samples are not needed, the thermal insulation box 13 remains closed. When samples are needed, the thermal insulation box 13 is temporarily opened by the drive mechanism 14, ensuring that the samples remain at a low temperature, preventing the loss of light hydrocarbon components that could affect the analysis results.

[0032] Example 2

[0033] like Figure 1 and Figure 2 As shown, the oil-bearing rock sample batch freezing device 1 according to an embodiment of the present invention comprises a base 11, a sample plate 12, a heat preservation box 13 and a driving mechanism 14. The sample plate 12 and the heat preservation box 13 are both arranged on the base 11. The sample plate 12 is provided with a plurality of sample cavities 121 for placing samples. Figure 3As shown, the sample plate 12 is provided with a first flow channel 122 for the flow of refrigerant. The first flow channel 122 is zigzag-shaped within the sample plate 12, extending long and passing past all sample cavities 121 to rapidly cool the sample plate 12. The thermal insulation box 13 includes a fixed portion 131 secured to the base 11 and a sliding portion 132 slidably disposed on the base 11. A drive mechanism 14 is connected to the sliding portion 132, which connects and disconnects the sliding portion 132 from the fixed portion 131 to seal or expose the sample plate 12.

[0034] The coolant can be alcohol, antifreeze, or another type of liquid. Since propane boils at -42°C, the coolant should keep the temperature of the sample plate 12 at least below -42°C to prevent propane and alkanes with higher carbon atoms from volatilizing and dissipating. To monitor the temperature of the sample plate 12, a temperature sensor (not shown) is also provided on the sample plate 12 in this embodiment.

[0035] The sample plate 12, equipped with multiple sample cavities 121, can hold multiple samples at once. By introducing a refrigerant into the first flow channel 122 within the sample plate 12, the sample plate 12 can be rapidly frozen, achieving cryogenic storage of all samples. The thermal insulation box 13 utilizes a split structure. When samples are not needed, the thermal insulation box 13 remains closed. When samples are needed, the thermal insulation box 13 is temporarily opened by the drive mechanism 14, ensuring that the samples remain at a low temperature, preventing the loss of light hydrocarbon components that could affect the analysis results.

[0036] Furthermore, a through hole 1311 is provided on the fixing portion 131 for the introduction of protective gas, and the protective gas is nitrogen. If there is a lot of air inside the insulation box 13, the sample plate 12 will be frozen, which will cause the water vapor in the air inside the insulation box 13 to turn into ice crystals and adhere to the sample, causing interference with subsequent detection of the sample. By injecting nitrogen into the insulation box 13, the air can be replaced, avoiding the frosting of water vapor caused by the low temperature environment. In order to maintain the stability of the nitrogen environment in the insulation box 13 and prevent air from entering the insulation box 13 from the gap, when the insulation box 13 is closed, nitrogen needs to be continuously introduced for a period of time so that the air pressure inside the insulation box 13 is greater than the external air pressure.

[0037] A gas pipeline (not shown) is provided on the through hole 1311 on the fixing portion 131, and nitrogen is introduced into the interior of the heat preservation box 13 through the gas pipeline. Figure 1 and Figure 2 As shown, a solenoid valve 15 is provided on the gas pipeline to control the delivery of nitrogen.

[0038] In order to make the air pressure inside the insulation box 13 greater than the external air pressure, a barometer (not shown in the figure) is also provided on the gas pipeline to monitor the pressure. Once the air pressure inside the insulation box 13 drops to close to the external air pressure, nitrogen is introduced to maintain the pressure.

[0039] The reason for opening the through hole 1311 on the fixed portion 131 rather than the sliding portion 132 is that the sliding portion 132 needs to move, which is inconvenient for connecting the gas pipeline and may easily cause the gas pipeline to loosen due to the frequent movement of the sliding portion 132.

[0040] Example 3

[0041] like Figure 1 and Figure 2 As shown, the oil-bearing rock sample batch freezing device 1 according to an embodiment of the present invention comprises a base 11, a sample plate 12, a heat preservation box 13 and a driving mechanism 14. The sample plate 12 and the heat preservation box 13 are both arranged on the base 11. The sample plate 12 is provided with a plurality of sample cavities 121 for placing samples. Figure 3 As shown, the sample plate 12 is provided with a first flow channel 122 for the flow of refrigerant. The first flow channel 122 is zigzag-shaped within the sample plate 12, extending long and passing past all sample cavities 121 to rapidly cool the sample plate 12. The thermal insulation box 13 includes a fixed portion 131 secured to the base 11 and a sliding portion 132 slidably disposed on the base 11. A drive mechanism 14 is connected to the sliding portion 132, which connects and disconnects the sliding portion 132 from the fixed portion 131 to seal or expose the sample plate 12.

[0042] The freezing liquid can be alcohol, antifreeze or other types of liquids. Since the boiling point of propane is minus 42°C, the freezing liquid should at least keep the temperature of the sample plate 12 below minus 42°C to prevent propane and alkanes with a larger number of carbon atoms from volatilizing and dissipating.

[0043] The sample plate 12, equipped with multiple sample cavities 121, can hold multiple samples at once. By introducing a refrigerant into the first flow channel 122 within the sample plate 12, the sample plate 12 can be rapidly frozen, achieving cryogenic storage of all samples. The thermal insulation box 13 utilizes a split structure. When samples are not needed, the thermal insulation box 13 remains closed. When samples are needed, the thermal insulation box 13 is temporarily opened by the drive mechanism 14, ensuring that the samples remain at a low temperature, preventing the loss of light hydrocarbon components that could affect the analysis results.

[0044] The fixing portion 131 is provided with a through hole 1311 for the introduction of protective gas, which is nitrogen. If there is a lot of air inside the insulation box 13, the sample plate 12 will be frozen, causing the water vapor in the air inside the insulation box 13 to turn into ice crystals and adhere to the sample, interfering with the subsequent detection of the sample. By injecting nitrogen into the insulation box 13, the air can be replaced, avoiding the frost of water vapor caused by the low temperature environment. In order to maintain the stability of the nitrogen environment in the insulation box 13 and prevent air from entering the insulation box 13 through the gaps, when the insulation box 13 is closed, nitrogen needs to be continuously introduced for a period of time so that the air pressure inside the insulation box 13 is greater than the external air pressure.

[0045] A gas pipeline (not shown) is provided on the through hole 1311 on the fixing portion 131, and nitrogen is introduced into the interior of the heat preservation box 13 through the gas pipeline. Figure 1 and Figure 2 As shown, a solenoid valve 15 is provided on the gas pipeline to control the delivery of nitrogen.

[0046] In order to make the air pressure inside the insulation box 13 greater than the external air pressure, a barometer (not shown in the figure) is also provided on the gas pipeline to monitor the pressure. Once the air pressure inside the insulation box 13 drops to close to the external air pressure, nitrogen is introduced to maintain the pressure.

[0047] The reason for opening the through hole 1311 on the fixed portion 131 rather than the sliding portion 132 is that the sliding portion 132 needs to move, which is inconvenient for connecting the gas pipeline and may easily cause the gas pipeline to loosen due to the frequent movement of the sliding portion 132.

[0048] Furthermore, a second flow channel (not shown) communicating with the first flow channel 122 is provided within the fixing portion 131, and a refrigerant inlet connector 133 and a refrigerant outlet connector 134 communicating with the second flow channel are provided on the surface of the fixing portion 131. If the refrigerant inlet connector 133 and the refrigerant outlet connector 134 were directly disposed on the sample plate 12, the normal closing of the thermal insulation box 13 would be hindered, and a relatively airtight space would not be formed within the thermal insulation box 13. This would not only result in poor insulation and heat preservation, but also make it difficult to form a stable nitrogen environment within the thermal insulation box 13.

[0049] like Figure 2 As shown, the sliding portion 132 includes a top plate 1321, a back plate (not shown), and two opposing side plates 1322. The top plate 1321 is positioned opposite the base 11 and spaced apart from the sample plate 12, while the back plate is positioned opposite the fixed portion 131. When the sliding portion 132 is connected to the fixed portion 131, the thermal insulation box 13 seals the sample plate 12, forming a relatively enclosed space within the thermal insulation box 13. Simply by moving the sliding portion 132 with the drive mechanism 14, the thermal insulation box 13 can be opened, exposing the sample plate 12, making operation very simple.

[0050] Example 4

[0051] like Figure 1 and Figure 2 As shown, the oil-bearing rock sample batch freezing device 1 according to an embodiment of the present invention comprises a base 11, a sample plate 12, a heat preservation box 13 and a driving mechanism 14. The sample plate 12 and the heat preservation box 13 are both arranged on the base 11. The sample plate 12 is provided with a plurality of sample cavities 121 for placing samples. Figure 3 As shown, the sample plate 12 is provided with a first flow channel 122 for the flow of refrigerant. The first flow channel 122 is zigzag-shaped within the sample plate 12, extending long and passing past all sample cavities 121 to rapidly cool the sample plate 12. The thermal insulation box 13 includes a fixed portion 131 secured to the base 11 and a sliding portion 132 slidably disposed on the base 11. A drive mechanism 14 is connected to the sliding portion 132, which connects and disconnects the sliding portion 132 from the fixed portion 131 to seal or expose the sample plate 12.

[0052] The freezing liquid can be alcohol, antifreeze or other types of liquids. Since the boiling point of propane is minus 42°C, the freezing liquid should at least keep the temperature of the sample plate 12 below minus 42°C to prevent propane and alkanes with a larger number of carbon atoms from volatilizing and dissipating.

[0053] The sample plate 12, equipped with multiple sample cavities 121, can hold multiple samples at once. By introducing a refrigerant into the first flow channel 122 within the sample plate 12, the sample plate 12 can be rapidly frozen, achieving cryogenic storage of all samples. The thermal insulation box 13 utilizes a split structure. When samples are not needed, the thermal insulation box 13 remains closed. When samples are needed, the thermal insulation box 13 is temporarily opened by the drive mechanism 14, ensuring that the samples remain at a low temperature, preventing the loss of light hydrocarbon components that could affect the analysis results.

[0054] The fixing portion 131 is provided with a through hole 1311 for the introduction of protective gas, which is nitrogen. If there is a lot of air inside the insulation box 13, the sample plate 12 will be frozen, causing the water vapor in the air inside the insulation box 13 to turn into ice crystals and adhere to the sample, interfering with the subsequent detection of the sample. By injecting nitrogen into the insulation box 13, the air can be replaced, avoiding the frost of water vapor caused by the low temperature environment. In order to maintain the stability of the nitrogen environment in the insulation box 13 and prevent air from entering the insulation box 13 through the gaps, when the insulation box 13 is closed, nitrogen needs to be continuously introduced for a period of time so that the air pressure inside the insulation box 13 is greater than the external air pressure.

[0055] A gas pipeline (not shown) is provided on the through hole 1311 on the fixing portion 131, and nitrogen is introduced into the interior of the heat preservation box 13 through the gas pipeline. Figure 1 and Figure 2As shown, a solenoid valve 15 is provided on the gas pipeline to control the delivery of nitrogen.

[0056] In order to make the air pressure inside the insulation box 13 greater than the external air pressure, a barometer (not shown in the figure) is also provided on the gas pipeline to monitor the pressure. Once the air pressure inside the insulation box 13 drops to close to the external air pressure, nitrogen is introduced to maintain the pressure.

[0057] The reason for opening the through hole 1311 on the fixed portion 131 rather than the sliding portion 132 is that the sliding portion 132 needs to move, which is inconvenient for connecting the gas pipeline and may easily cause the gas pipeline to loosen due to the frequent movement of the sliding portion 132.

[0058] Furthermore, a second flow channel (not shown) communicating with the first flow channel 122 is provided within the fixing portion 131, and a refrigerant inlet connector 133 and a refrigerant outlet connector 134 communicating with the second flow channel are provided on the surface of the fixing portion 131. If the refrigerant inlet connector 133 and the refrigerant outlet connector 134 were directly disposed on the sample plate 12, the normal closing of the thermal insulation box 13 would be hindered, and a relatively airtight space would not be formed within the thermal insulation box 13. This would not only result in poor insulation and heat preservation, but also make it difficult to form a stable nitrogen environment within the thermal insulation box 13.

[0059] like Figure 2 As shown, the sliding portion 132 includes a top plate 1321, a back plate (not shown), and two opposing side plates 1322. The top plate 1321 is positioned opposite the base 11 and spaced apart from the sample plate 12, while the back plate is positioned opposite the fixed portion 131. When the sliding portion 132 is connected to the fixed portion 131, the thermal insulation box 13 seals the sample plate 12, forming a relatively enclosed space within the thermal insulation box 13. Simply by moving the sliding portion 132 with the drive mechanism 14, the thermal insulation box 13 can be opened, exposing the sample plate 12, making operation very simple.

[0060] Furthermore, a guide groove 111 is provided on the base 11 , and the bottom of the side plate 1322 is disposed in the guide groove 111 , so that the sliding portion 132 can maintain linear motion and accurately align with the fixing portion 131 , thereby improving reliability.

[0061] Example 5

[0062] like Figure 1 and Figure 2 As shown, the oil-bearing rock sample batch freezing device 1 according to an embodiment of the present invention comprises a base 11, a sample plate 12, a heat preservation box 13 and a driving mechanism 14. The sample plate 12 and the heat preservation box 13 are both arranged on the base 11. The sample plate 12 is provided with a plurality of sample cavities 121 for placing samples. Figure 3As shown, the sample plate 12 is provided with a first flow channel 122 for the flow of refrigerant. The first flow channel 122 is zigzag-shaped within the sample plate 12, extending long and passing past all sample cavities 121 to rapidly cool the sample plate 12. The thermal insulation box 13 includes a fixed portion 131 secured to the base 11 and a sliding portion 132 slidably disposed on the base 11. A drive mechanism 14 is connected to the sliding portion 132, which connects and disconnects the sliding portion 132 from the fixed portion 131 to seal or expose the sample plate 12.

[0063] The freezing liquid can be alcohol, antifreeze or other types of liquids. Since the boiling point of propane is minus 42°C, the freezing liquid should at least keep the temperature of the sample plate 12 below minus 42°C to prevent propane and alkanes with a larger number of carbon atoms from volatilizing and dissipating.

[0064] The sample plate 12, equipped with multiple sample cavities 121, can hold multiple samples at once. By introducing a refrigerant into the first flow channel 122 within the sample plate 12, the sample plate 12 can be rapidly frozen, achieving cryogenic storage of all samples. The thermal insulation box 13 utilizes a split structure. When samples are not needed, the thermal insulation box 13 remains closed. When samples are needed, the thermal insulation box 13 is temporarily opened by the drive mechanism 14, ensuring that the samples remain at a low temperature, preventing the loss of light hydrocarbon components that could affect the analysis results.

[0065] The fixing portion 131 is provided with a through hole 1311 for the introduction of protective gas, which is nitrogen. If there is a lot of air inside the insulation box 13, the sample plate 12 will be frozen, causing the water vapor in the air inside the insulation box 13 to turn into ice crystals and adhere to the sample, interfering with the subsequent detection of the sample. By injecting nitrogen into the insulation box 13, the air can be replaced, avoiding the frost of water vapor caused by the low temperature environment. In order to maintain the stability of the nitrogen environment in the insulation box 13 and prevent air from entering the insulation box 13 through the gaps, when the insulation box 13 is closed, nitrogen needs to be continuously introduced for a period of time so that the air pressure inside the insulation box 13 is greater than the external air pressure.

[0066] A gas pipeline (not shown) is provided on the through hole 1311 on the fixing portion 131, and nitrogen is introduced into the interior of the heat preservation box 13 through the gas pipeline. Figure 1 and Figure 2 As shown, a solenoid valve 15 is provided on the gas pipeline to control the delivery of nitrogen.

[0067] In order to make the air pressure inside the insulation box 13 greater than the external air pressure, a barometer (not shown in the figure) is also provided on the gas pipeline to monitor the pressure. Once the air pressure inside the insulation box 13 drops to close to the external air pressure, nitrogen is introduced to maintain the pressure.

[0068] The reason for opening the through hole 1311 on the fixed portion 131 rather than the sliding portion 132 is that the sliding portion 132 needs to move, which is inconvenient for connecting the gas pipeline and may easily cause the gas pipeline to loosen due to the frequent movement of the sliding portion 132.

[0069] Furthermore, a second flow channel (not shown) communicating with the first flow channel 122 is provided within the fixing portion 131, and a refrigerant inlet connector 133 and a refrigerant outlet connector 134 communicating with the second flow channel are provided on the surface of the fixing portion 131. If the refrigerant inlet connector 133 and the refrigerant outlet connector 134 were directly disposed on the sample plate 12, the normal closing of the thermal insulation box 13 would be hindered, and a relatively airtight space would not be formed within the thermal insulation box 13. This would not only result in poor insulation and heat preservation, but also make it difficult to form a stable nitrogen environment within the thermal insulation box 13.

[0070] like Figure 2 As shown, the sliding portion 132 includes a top plate 1321, a back plate (not shown), and two opposing side plates 1322. The top plate 1321 is positioned opposite the base 11 and spaced apart from the sample plate 12, while the back plate is positioned opposite the fixed portion 131. When the sliding portion 132 is connected to the fixed portion 131, the thermal insulation box 13 seals the sample plate 12, forming a relatively enclosed space within the thermal insulation box 13. Simply by moving the sliding portion 132 with the drive mechanism 14, the thermal insulation box 13 can be opened, exposing the sample plate 12, making operation very simple.

[0071] Furthermore, a guide groove 111 is provided on the base 11 , and the bottom of the side plate 1322 is disposed in the guide groove 111 , so that the sliding portion 132 can maintain linear motion and accurately align with the fixing portion 131 , thereby improving reliability.

[0072] like Figure 2 As shown, the driving mechanism 14 includes a driving member 141 and a connecting member 142 provided on the driving member 141. The connecting member 142 is connected to the sliding portion 132 to enable the sliding portion 132 to reciprocate. In this embodiment, the driving member 141 is a cylinder.

[0073] Example 6

[0074] like Figure 4 As shown, an embodiment of the present invention further provides a batch analysis system for oil-bearing rock samples, comprising a pyrolyzer 2 , on which is provided the batch freezing device 1 for oil-bearing rock samples according to any of the above embodiments.

[0075] The pyrolyzer 2 includes a manipulator 21, a detection mechanism 22, and a controller (not shown). The manipulator 21, the oil-bearing rock sample batch freezing device 1, and the detection mechanism 22 are all connected to the controller. The manipulator 21 is used to grab samples from the sample chamber 121 and deliver them to the detection mechanism 22 for analysis. The controller is a PLC, which enables the oil-bearing rock sample batch analysis system to have a high level of automation, reducing manual operations and improving detection efficiency.

[0076] The oil-containing rock sample batch freezing device 1 of this embodiment is set on the pyrolyzer 2. The manipulator 21 of the pyrolyzer 2 can grab the sample in the sample chamber 121 nearby and send it to the detection mechanism 22 for analysis. The sample is exposed to the air for a short time, the analysis efficiency is high and the results are accurate.

[0077] Example 7

[0078] like Figure 5 As shown, an embodiment of the present invention further provides a method for batch analysis of oil-bearing rock samples, comprising the following steps:

[0079] S1, the drive mechanism 14 opens the heat preservation box 13 to expose the sample plate 12, the sample is placed in the sample cavity 121, and the heat preservation box 13 is closed. A freezing liquid is passed into the sample plate 12 to freeze the sample;

[0080] S2, the manipulator 21 moves to the top of the heat preservation box 13, the drive mechanism 14 opens the heat preservation box 13, and after the manipulator 21 grabs the sample, the drive mechanism 14 closes the heat preservation box 13;

[0081] S3, the manipulator 21 sends the sample to the detection mechanism 22 for analysis, and the manipulator 21 is reset;

[0082] S4. Repeat steps S2 and S3 until all samples are analyzed.

[0083] In steps S1 and S2, when the heat preservation box 13 is closed, nitrogen is introduced into the heat preservation box 13 to maintain a high purity nitrogen environment inside the heat preservation box 13 to prevent water vapor from frosting. A gas pipeline (not shown) is provided on the through hole 1311 on the fixing portion 131, and nitrogen is introduced into the heat preservation box 13 through the gas pipeline. Figure 1 and Figure 2 As shown, a solenoid valve 15 is provided on the gas pipeline to control the delivery of nitrogen. In this embodiment, to reduce the impact of water vapor in the outside air on the sample in the sample chamber 121, nitrogen is continuously introduced when the thermal insulation box 13 is open. When the thermal insulation box 13 is closed, nitrogen continues to be introduced for a period of time until a preset pressure is reached.

[0084] Specifically, the pyrolyzer 2 also includes a guide rail 23, on which the manipulator 21 is disposed. The guide rail 23 is also provided with a first sensor 24 and a second sensor 25. The first sensor 24 is used to determine whether the manipulator 21 has moved into position. When the first sensor 24 detects that the manipulator 21 has moved into position, the controller instructs the drive mechanism 14 to open the insulation box 13 and opens the solenoid valve 15 to begin introducing nitrogen into the insulation box 13. The second sensor 25 then detects whether the insulation box 13 is open. If the second sensor 25 detects that the insulation box 13 is open, the controller instructs the manipulator 21 to grab the sample and move it to the detection mechanism 22. When the first sensor 24 detects that the manipulator 21 has left, the controller instructs the drive mechanism 14 to close the insulation box 13. After the preset pressure is reached, the controller closes the solenoid valve 15 to stop introducing nitrogen into the insulation box 13.

[0085] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A batch freezing device for oil-bearing rock samples, characterized in that: It includes a base, a sample plate, an insulation box and a driving mechanism. The sample plate and the insulation box are both arranged on the base. The sample plate is provided with a plurality of sample cavities for placing samples. A first flow channel for the flow of freezing liquid is provided inside the sample plate. The insulation box includes a fixed part fixed on the base and a sliding part slidably arranged on the base. The driving mechanism is connected to the sliding part. The driving mechanism connects or separates the sliding part with the fixed part to seal or expose the sample plate.

2. The oil-bearing rock sample batch freezing device according to claim 1, characterized in that: The fixing part or the sliding part is provided with a through hole for the protective gas to pass through.

3. The oil-bearing rock sample batch freezing device according to claim 1, characterized in that: A second flow channel communicating with the first flow channel is provided inside the fixing portion, and a refrigerant liquid inlet joint and a refrigerant liquid outlet joint communicating with the second flow channel are provided on the surface of the fixing portion.

4. The oil-bearing rock sample batch freezing device according to claim 1, characterized in that: The sliding portion includes a top plate, a back plate and two oppositely arranged side plates. The top plate is arranged opposite to the base and spaced apart from the sample plate. The back plate is arranged opposite to the fixing portion.

5. The oil-bearing rock sample batch freezing device according to claim 4, characterized in that: A guide groove is provided on the base, and the bottom of the side plate is arranged in the guide groove.

6. The oil-bearing rock sample batch freezing device according to claim 1, characterized in that: The driving mechanism includes a driving member and a connecting member provided on the driving member, wherein the connecting member is connected to the sliding portion to enable the sliding portion to reciprocate.

7. A batch analysis system for oil-bearing rock samples, characterized in that: It comprises a pyrolyzer, on which is provided the batch freezing device for oil-bearing rock samples according to any one of claims 1-6.

8. The oil-bearing rock sample batch analysis system according to claim 7, characterized in that: The pyrolyzer includes a manipulator, a detection mechanism and a controller. The manipulator, the oil-bearing rock sample batch freezing device and the detection mechanism are all connected to the controller. The manipulator is used to grab the sample in the sample cavity and send it to the detection mechanism for analysis.

9. A method for batch analysis of oil-bearing rock samples, characterized in that: The steps include: S1, causing the driving mechanism to open the heat preservation box to expose the sample plate, placing the sample into the sample chamber, closing the heat preservation box, and passing a freezing liquid into the sample plate to freeze the sample; S2, moving the manipulator to the top of the heat preservation box, the driving mechanism opens the heat preservation box, and after the manipulator grabs the sample, the driving mechanism closes the heat preservation box; S3, the manipulator sends the sample to the testing agency for analysis, and the manipulator resets; S4. Repeat steps S2 and S3 until all samples are analyzed.

10. The method for batch analysis of oil-bearing rock samples according to claim 9, characterized in that: In steps S1 and S2, when the heat preservation box is closed, protective gas is introduced into the interior of the heat preservation box.

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