Experimental apparatus for in-situ heating and conversion of organic matter into oil and gas

Abstract

This invention provides an experimental apparatus for in-situ heating and conversion of organic matter into oil and gas. The apparatus includes: a vessel body with a cavity for holding an organic sample; a heating device for heating the vessel body; an air inlet device connected to a first end of the cavity for supplying fluid into the cavity; and a reaction product collection device connected to a second end of the cavity for collecting the products from the in-situ heating of the organic sample in the cavity. This invention overcomes the technical problem of low accuracy in measuring the amount of oil and gas produced by in-situ heating and conversion of organic matter obtained through existing laboratory thermal simulation methods.

Description

Technical Field

[0001] This invention relates to the field of petroleum exploration and development technology, and in particular to an experimental device for in-situ heating and conversion of organic matter into oil and gas. Background Technology

[0002] Shale refers to sedimentary rocks with a high total organic carbon (TOC) content and a layered foliation. When shale maturity is low, i.e., vitrinite reflectance (Ro) is less than 1.0%, the pores in the shale are underdeveloped, making fluid flow difficult, and commercial-scale development cannot be achieved using existing horizontal well volumetric fracturing technology. In-situ heating and conversion technology can be used for development. This technology converts unconverted organic matter in shale into oil and gas through in-situ heating, and then simultaneously extracts the converted oil and gas along with the oil and gas retained in the shale. The shale suitable for in-situ heating and conversion technology is mainly shale with medium to low maturity, i.e., Ro less than 1.0%, including medium to low maturity shale and immature oil shale. The solid organic matter and retained oil in the shale are the targets of in-situ heating and conversion, referred to as organic matter. This technology is also applicable to the in-situ heating and upgrading of heavy oil.

[0003] Preliminary research estimates that the global recoverable resources of shale using in-situ heating and conversion technology exceed 1.5 trillion tons, and the recoverable resources of natural gas using this technology are approximately 1300 trillion cubic meters. In my country, the recoverable resources of shale using in-situ heating and conversion technology exceed 80 billion tons, and the recoverable resources of natural gas using this technology exceed 60 trillion cubic meters. The recoverable resources of shale using in-situ heating and conversion technology are more than three times the recoverable resources of conventional oil and natural gas, indicating enormous potential.

[0004] The key to in-situ heating and conversion of shale is the accurate evaluation of recoverable oil and gas resources. The recoverable oil and gas resources of in-situ heating and conversion depend on the amount of oil and gas produced by in-situ heating and conversion of shale. There are two ways to evaluate the amount of oil and gas produced by in-situ heating and conversion of shale: one is to obtain the amount of oil and gas produced through actual development data, and the other is to obtain the amount of oil and gas produced through laboratory thermal simulation.

[0005] Shale in-situ heating and conversion development is carried out underground. The target layer has a certain pressure. As the temperature rises, the generated oil and gas are continuously produced. It is an almost semi-open system. The amount of oil produced during the shale in-situ heating and conversion process is greatly affected by the pressure and the degree of secondary cracking of the generated oil.

[0006] Because in-situ heating and conversion development takes a long time, the evaluation of oil and gas production from in-situ heating and conversion of shale under different geological conditions requires development data of shale under different geological conditions. However, if there is no actual oil and gas production from in-situ heating and conversion of shale before the in-situ heating and conversion, the above-mentioned approach one cannot achieve the evaluation of oil and gas production from in-situ heating and conversion.

[0007] The second approach mentioned above, namely obtaining the produced oil and gas volume through laboratory thermal simulation, can be adopted. However, current laboratory thermal simulation experiments have drawbacks such as small sample size, poor sealing, inability to achieve slow heating, susceptibility to blockage during thermal simulation, and significant losses during the collection process. As a result, the accuracy of the oil and gas volume obtained through laboratory thermal simulation for in-situ shale heating and conversion is low, making it difficult to accurately evaluate the recoverable oil and gas resources from in-situ shale heating and conversion. Summary of the Invention

[0008] The purpose of this invention is to provide an experimental device for in-situ heating and conversion of organic matter into oil and gas, so as to overcome the technical problem that the accuracy of the amount of oil and gas produced by in-situ heating and conversion of organic matter obtained by laboratory thermal simulation methods is low.

[0009] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:

[0010] This invention provides an experimental apparatus for in-situ heating and conversion of organic matter into oil and gas, comprising:

[0011] The vessel body is equipped with a cavity for holding organic samples, and breathable baffles are installed above and below the sample.

[0012] A heating device capable of slow, uniform heating and precise temperature measurement and control of the vessel body;

[0013] An air intake device, which is connected to the first end of the accommodating cavity, is used to supply fluid into the accommodating cavity;

[0014] A reaction product collection device, connected to the second end of the accommodating cavity, is used to collect the products of the organic sample in the accommodating cavity. In a preferred embodiment, the first end of the accommodating cavity is the upper end of the accommodating cavity, and the second end of the accommodating cavity is the lower end of the accommodating cavity.

[0015] In a preferred embodiment, the vessel body is connected to a first baffle plate and a second baffle plate. The first baffle plate is located at the first end of the receiving cavity, and the second baffle plate is located at the second end of the receiving cavity. The shale sample is filled between the first baffle plate and the second baffle plate. The first baffle plate is provided with a first vent hole, and the second baffle plate is provided with a second vent hole.

[0016] In a preferred embodiment, the first baffle includes a first ventilated baffle, a second ventilated baffle, and a third ventilated baffle that are sequentially distributed along the direction from the first end of the accommodating cavity to the second end of the accommodating cavity; the diameter of the first vent hole of the first ventilated baffle, the diameter of the first vent hole of the second ventilated baffle, and the diameter of the first vent hole of the third ventilated baffle decrease sequentially.

[0017] In a preferred embodiment, the first vent hole of the first breathable partition has a pore size of 200 micrometers, the first vent hole of the second breathable partition has a pore size of 100 micrometers, and the first vent hole of the third breathable partition has a pore size of 50 micrometers.

[0018] In a preferred embodiment, the second baffle plate includes a fourth, a fifth, and a sixth ventilated baffle plate that are sequentially distributed along the direction from the first end of the accommodating cavity to the second end of the accommodating cavity; the diameters of the second vent holes of the fourth, fifth, and sixth ventilated baffle plates increase sequentially.

[0019] In a preferred embodiment, the second vent hole of the fourth ventilated partition has a pore size of 100 micrometers, the second vent hole of the fifth ventilated partition has a pore size of 200 micrometers, and the second vent hole of the sixth ventilated partition has a pore size of 300 micrometers.

[0020] In a preferred embodiment, the air intake device includes an air intake chassis and an air intake pipe. The air intake chassis is disposed at the first end of the accommodating cavity and is located on the side of the first baffle plate opposite to the accommodating cavity. The air intake chassis is provided with a plurality of air outlets, and the plurality of air outlets are connected to the air intake pipe.

[0021] In a preferred embodiment, the reaction product collection device includes a product inlet disc and a product delivery pipe. The product inlet disc is located at the second end of the accommodating cavity and on the side of the second baffle plate opposite to the accommodating cavity. The product inlet disc has a plurality of product inlet holes, and the plurality of product inlet holes are connected to the product delivery pipe.

[0022] In a preferred embodiment, the experimental apparatus includes an abnormal pressure control mechanism connected to the accommodating cavity. When the pressure inside the accommodating cavity exceeds the pressure relief value, the abnormal pressure control mechanism initiates the release of air.

[0023] In a preferred embodiment, the reaction product collection device includes a condensation mechanism and a liquid collection cylinder. The collected reaction products flow through the condensation mechanism, and the condensed liquid flows into the liquid collection cylinder.

[0024] In a preferred embodiment, the condensation mechanism includes a vertically arranged condenser tube with a liquid outlet at the lower end, allowing the collected reaction products to flow upward within the condenser tube.

[0025] In a preferred embodiment, the reaction product collection device includes a gas collection mechanism, which includes a water bottle, a discharge water collection bottle, and a gas collection bag disposed inside the water bottle. The gas outlet of the condensation mechanism is connected to the gas collection bag, and the water bottle is connected to the discharge water collection bottle.

[0026] In a preferred embodiment, the reaction product collection device includes a gas sampling and collection mechanism, which includes a gas sampling bottle and at least two one-way control valves. The gas sampling bottle and the at least two one-way control valves are connected to a gas delivery pipe between the condensation mechanism and the gas sampling and collection mechanism. The at least two one-way control valves are located between the gas collection mechanism and the condensation mechanism, and the gas sampling bottle is disposed between the at least two one-way control valves.

[0027] In a preferred embodiment, the reaction product collection device includes an excess product collection mechanism, which comprises a temporary storage unit, a first control valve, and a second control valve. The temporary storage unit is connected to the product delivery pipe in the reaction product collection device via the first control valve. When the product flow rate at the inlet of the first control valve exceeds a preset flow rate value, the first control valve connects the temporary storage unit to the product delivery pipe, allowing the product in the product delivery pipe to flow into the temporary storage unit through the first control valve. The temporary storage unit is connected to the product delivery pipe via the second control valve. When the product flow rate at the inlet of the first control valve is less than the preset flow rate value, the second control valve connects the temporary storage unit to the product delivery pipe, allowing the product in the temporary storage unit to flow into the product delivery pipe through the second control valve. The accommodating cavity, the first control valve, the second control valve, and the condensation mechanism are sequentially distributed along the product delivery pipe.

[0028] In a preferred embodiment, the temporary storage device includes a temporary storage cavity, a buffer, and a movable piston disposed between the temporary storage cavity and the buffer, wherein both the first control valve and the second control valve are connected to the temporary storage cavity.

[0029] In a preferred embodiment, the vessel body includes a cap and a vessel body, the accommodating cavity is disposed in the vessel body, the vessel body has a body opening for filling organic samples, and the cap is installed in the body opening.

[0030] In a preferred embodiment, a sealing ring is provided between the capping device and the vessel body, and the sealing ring is made of carbon rubber.

[0031] In a preferred embodiment, the heating device includes a heater that surrounds the vessel body.

[0032] In a preferred embodiment, the heating device includes a first insulation layer that surrounds the heater.

[0033] In a preferred embodiment, a first temperature detector is externally connected to the heater.

[0034] In a preferred embodiment, a second temperature detector is provided inside the accommodating cavity.

[0035] In a preferred embodiment, the experimental apparatus includes a second insulation layer that covers the portion of the product delivery pipe located outside the reactor body.

[0036] The features and advantages of this invention are:

[0037] Using this experimental apparatus for in-situ heating and conversion of organic matter into oil and gas, an organic sample is filled into the containment chamber, and a heating device regulates the temperature of the reactor and its containment chamber. An air inlet device supplies fluid into the containment chamber; the fluid flows through the organic sample, simulating fluid pressure and improving the realism of the simulated in-situ heating and conversion of shale underground oil and gas. It more accurately reflects the control of fluid pressure on the amount of oil and gas produced during the in-situ heating and conversion of shale. The organic sample undergoes in-situ heating and conversion, and a reaction product collection device collects the products to measure the amount of oil and gas produced.

[0038] This experimental device for in-situ heating and conversion of organic matter into oil and gas can regulate temperature and simulate fluid pressure more accurately, improving the accuracy of the amount of oil and gas produced by in-situ heating and conversion of organic matter obtained through simulation experiments. This is beneficial for accurately evaluating the recoverable resources of in-situ heating and conversion of organic matter into oil and gas. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 A schematic diagram of the experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production provided by the present invention;

[0041] Figure 2 for Figure 1 The diagram shows the structure of the reactor body in the experimental apparatus for in-situ heating and conversion of organic matter into oil and gas.

[0042] Figure 3a for Figure 1 The top view of the air intake chassis in the experimental device for in-situ heating and conversion of organic matter into oil and gas production.

[0043] Figure 3b for Figure 1 A top view of the product entering the pan in the experimental apparatus for in-situ heating and conversion of organic matter into oil and gas;

[0044] Figure 4 for Figure 1 A schematic diagram of the sealing ring in the experimental device for in-situ heating and conversion of organic matter into oil and gas production;

[0045] Figure 5 for Figure 3a A cross-sectional view of the radial porous intake pipe in the intake chassis shown.

[0046] Figure 6 for Figure 3b The diagram shows a cross-sectional view of the radial porous tubes through which the product enters the dish.

[0047] Explanation of icon numbers:

[0048] 10. Vessel body; 102. Vessel main body; 1021. Main body opening; 103. Sealing cap; 104. Sealing ring;

[0049] 101. Receiving cavity; 1011. First end of the receiving cavity; 1013. Upper end of the receiving cavity; 1012. Second end of the receiving cavity; 1014. Lower end of the receiving cavity;

[0050] 105. First baffle plate; 1055. First vent; 1051. First ventilated partition; 1052. Second ventilated partition; 1053. Third ventilated partition;

[0051] 106. Second baffle plate; 1066. Second vent; 1061. Fourth vent partition; 1062. Fifth vent partition; 1063. Sixth vent partition;

[0052] 40. Heating device;

[0053] 401. Heater; 402. First insulation layer; 403. First temperature detector; 404. Second temperature detector;

[0054] 405. Second insulation layer;

[0055] 20. Air intake device; 202. Air intake pipe;

[0056] 204. Intake chassis; 2042. Radial porous intake pipe; 2043. Exhaust port;

[0057] 201. Gas supply control mechanism; 203. Inlet pressure control mechanism; 205. Abnormal pressure control mechanism;

[0058] 30. Reaction product collection device; 302. Product delivery pipe;

[0059] 301. Product enters the disc; 3012. Product emerges in radial porous tubes; 3013. Product enters the orifice;

[0060] 303. Automatic control device for product discharge;

[0061] 34. Excess product collection mechanism; 304. First control valve; 309. Second control valve;

[0062] 305. Temporary storage device; 3051. Temporary storage cavity; 306. Buffer; 307. Movable piston; 308. Product leakage detection assembly;

[0063] 310. Condensation mechanism; 3101. Condenser tube; 3102. Liquid outlet; 312. Condensate control mechanism; 311. Liquid collection cylinder;

[0064] 3130. Gas sampling and collection mechanism; 313. Measuring instrument; 314. One-way control valve; 315. Gas sampling bottle;

[0065] 3140. Gas collection mechanism; 316. Gas collection bag; 317. Water bottle; 318. Drainage water collection bottle; 319. Gas delivery pipe. Detailed Implementation

[0066] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0067] This invention provides an experimental apparatus for in-situ heating and conversion of organic matter into oil and gas, such as... Figure 1 As shown, the experimental apparatus includes: a vessel body 10, a heating device 40, an air inlet device 20, and a reaction product collection device 30; the vessel body 10 is provided with a container cavity 101 for containing organic samples; the heating device 40 is capable of heating the vessel body 10; the air inlet device 20 is connected to the first end 1011 of the container cavity and is used to deliver fluid to the container cavity 101; the reaction product collection device 30 is connected to the second end 1012 of the container cavity and is used to collect the products of the organic samples in the container cavity 101.

[0068] Using this experimental apparatus for in-situ heating and conversion of organic matter into oil and gas, the containment cavity 101 is filled with an organic sample, and the heating device 40 regulates the temperature of the vessel body 10 and its containment cavity 101. The air inlet device 20 supplies fluid into the containment cavity 101, and the fluid flows through the organic sample. Simulating the fluid pressure improves the realism of the simulated in-situ heating and conversion of organic matter into oil and gas, and more accurately reflects the control of fluid pressure on the amount of oil and gas produced during the in-situ heating and conversion of organic matter. During the in-situ heating and conversion of the organic sample, the reaction product collection device 30 collects the products to measure the amount of oil and gas produced.

[0069] This experimental device for in-situ heating and conversion of organic matter into oil and gas can regulate temperature and simulate fluid pressure, improving the accuracy of the amount of oil and gas produced by in-situ heating of organic matter obtained through simulation experiments. This is beneficial for accurately evaluating the recoverable resources of oil and gas produced by in-situ heating and conversion of organic matter.

[0070] To better simulate the in-situ heating and transformation of organic matter underground, the vessel body 10 and its containing cavity 101 are arranged vertically. Further, as... Figure 1 and Figure 2 As shown, the first end 1011 of the accommodating cavity is the upper end 1013 of the accommodating cavity, and the second end 1012 of the accommodating cavity is the lower end 1014 of the accommodating cavity. That is, the air intake device 20 is connected to the upper end 1013 of the accommodating cavity, and the reaction product collection device 30 is connected to the lower end 1014 of the accommodating cavity. During the thermal simulation process, the oil density is greater than the gas density, which is conducive to the timely production of the generated oil and reduces the need for the generated oil to be produced through secondary cracking to generate lighter oil and then gasified. In the process of shale underground in-situ heating and conversion development, production wells are generally deployed at the bottom of the heated shale layer. Thus, this experimental device is more in line with the conditions of shale underground in-situ heating and conversion.

[0071] In one embodiment of the present invention, the vessel body 10 includes a capping device 103 and a vessel body 102. A accommodating cavity 101 is provided in the vessel body 102. The vessel body 102 is provided with a body opening 1021 for filling organic samples. The capping device 103 is installed in the body opening 1021.

[0072] The accommodating cavity 101 can be cylindrical. Preferably, the inner diameter of the accommodating cavity 101 is greater than 8.5 cm, the height is greater than 25 cm, and the volume of the accommodating cavity 101 is greater than 1.3 liters. It has a large capacity, which can avoid the problem of not being able to accurately evaluate the amount and composition of oil and gas produced due to insufficient oil and gas production. Preferably, both the capping device 103 and the vessel body 102 are made of titanium-nickel-copper-iron alloy. The wall thickness of the vessel body 102 is greater than 2 cm, and the thickness of the capping device 103 is greater than 10 cm. Both can withstand temperatures above 1000 degrees Celsius and pressures above 80 MPa, and are resistant to H2S corrosion and H2 embrittlement. They can be guaranteed to work continuously for 3 years at 1000℃ and 80 MPa without deformation, corrosion, or leakage.

[0073] Furthermore, such as Figure 2 and Figure 4 As shown, a sealing ring 104 is provided between the capping device 103 and the vessel body 102. The sealing ring 104 is made of carbon rubber, which has high temperature resistance and can effectively prevent leakage, thus improving the accuracy of the obtained oil output. The sealing ring 104, made of carbon rubber, exhibits minimal deformation and leak-proof performance at 1200℃ and 80MPa pressure, and is resistant to H2S corrosion. Preferably, the upper and lower surfaces of the sealing ring 104 are uniformly coated with a sealing coating to form a sealing ring coating. This sealing ring coating is a semi-solid aluminum alloy and lubricating grease-based anti-oxidation and anti-volatile paste coating, resistant to temperatures up to 1200℃ and 80MPa, and not prone to leakage.

[0074] like Figure 2 As shown, the vessel body 10 is connected to a first baffle plate 105 and a second baffle plate 106. The first baffle plate 105 is located at the first end 1011 of the receiving cavity, and the second baffle plate 106 is located at the second end 1012 of the receiving cavity. Shale samples are filled between the first baffle plate 105 and the second baffle plate 106. The first baffle plate 105 has a first vent hole 1055, and the second baffle plate 106 has a second vent hole 1066. The first baffle plate 105 ensures that gas enters the receiving cavity 101 uniformly from top to bottom; the second baffle plate 106 ensures that the generated oil enters the bottom of the receiving cavity 101 in a timely manner through the second baffle plate 106. In the shale thermal simulation, the experimental sample is a rock fragment sample, which is a pulverized sample. The first baffle plate 105 and the second baffle plate 106 can prevent the rock fragment sample from entering the product delivery pipe 302 and the air inlet pipe 202, avoiding blockage and facilitating the smooth implementation of the thermal simulation experiment. Both the first shielding plate 105 and the second shielding plate 106 can be made of titanium-nickel-copper-iron alloy.

[0075] Furthermore, the first baffle 105 includes a direction along the first end 1011 of the receiving cavity to the second end 1012 of the receiving cavity (i.e., Figure 2The first ventilated baffle 1051, the second ventilated baffle 1052, and the third ventilated baffle 1053 are arranged sequentially from top to bottom. The diameters of the first vent holes 1055 of the first ventilated baffle 1051, the second ventilated baffle 1052, and the third ventilated baffle 1053 decrease sequentially, which helps to ensure that the gas enters the accommodating cavity 101 evenly from top to bottom.

[0076] Preferably, the first vent hole 1055 of the first ventilated partition 1051 has a pore size of 200 micrometers, the first vent hole 1055 of the second ventilated partition 1052 has a pore size of 100 micrometers, and the first vent hole 1055 of the third ventilated partition 1053 has a pore size of 50 micrometers.

[0077] Furthermore, the second baffle 106 includes a direction along the first end 1011 of the receiving cavity to the second end 1012 of the receiving cavity (i.e., Figure 2 The fourth venting baffle 1061, the fifth venting baffle 1062, and the sixth venting baffle 1063, arranged sequentially from top to bottom, are shown in the diagram. The diameters of the second vent holes 1066 in the fourth venting baffle 1061, the fifth venting baffle 1062, and the sixth venting baffle 1063 increase sequentially, which helps to ensure that the generated oil enters the bottom of the receiving cavity 101 in a timely manner through the second baffle 106.

[0078] Preferably, the second vent hole 1066 of the fourth ventilated partition 1061 has a pore size of 100 micrometers, the second vent hole 1066 of the fifth ventilated partition 1062 has a pore size of 200 micrometers, and the second vent hole 1066 of the sixth ventilated partition 1063 has a pore size of 300 micrometers.

[0079] The inventors discovered that fluid pressure is the primary factor affecting the in-situ heating and transformation of organic matter underground. This experimental device, by supplying gas to the accommodating cavity 101 through the air intake device 20, can simulate fluid pressure. Figure 1 and Figure 2 As shown, the air intake device 20 includes an air intake chassis 204 and an air intake pipe 202. The air intake chassis 204 is located at the first end 1011 of the accommodating cavity and on the side of the first baffle plate 105 opposite to the accommodating cavity 101. The air intake chassis 204 has multiple air outlets 2043, all of which are connected to the air intake pipe 202. The gas in the air intake pipe 202 first enters the air intake chassis 204 and then flows into the accommodating cavity 101 through the various air outlets 2043, which helps to improve the uniformity of gas distribution. The end of the air intake pipe 202 is connected to the air intake chassis 204, and the end of the air intake pipe 202 is located between the first baffle plate 105 and the sealing cap 103, which can ensure that the incoming gas enters the upper part of the accommodating cavity 101 in a timely manner.

[0080] like Figure 3a and Figure 5 As shown, the intake chassis 204 includes multiple radially porous intake pipes 2042, which are connected to the intake pipe 202. Air outlet holes 2043 are evenly distributed on the radially porous intake pipes 2042 to ensure uniform distribution of the incoming gas.

[0081] The experimental apparatus includes an intake pressure control mechanism 203 connected to the accommodating cavity 101. The intake pressure control mechanism 203 automatically controls the pressure inside the accommodating cavity 101, and the pressure control tolerance is less than 0.1 MPa. The end of the intake pipe 202 is connected to the gas supply control mechanism 201, which supplies gas to the intake pipe 202. The gas supply control mechanism 201 includes a flow control component.

[0082] In one embodiment of the present invention, the reaction product collection device 30 includes a product inlet disk 301 and a product delivery pipe 302. The product inlet disk 301 is located at the second end 1012 of the accommodating cavity and on the side of the second baffle plate 106 opposite to the accommodating cavity 101. The product inlet disk 301 has a plurality of product inlet holes 3013, all of which are connected to the product delivery pipe 302. The product inlet disk 301 is located at the lower part of the accommodating cavity 101, below the second baffle plate 106. The product delivery pipe 302 is connected to the product inlet disk 301. The product inlet disk 301 is located at the lower part of the accommodating cavity 101 and connected to the product delivery pipe 302, ensuring that the oil generated during the thermal simulation process preferentially enters the product delivery pipe 302 through the product inlet disk 301 when it needs to be discharged, so as to reduce the secondary cracking of the generated oil.

[0083] like Figure 3b and Figure 6 As shown, the product inlet disc 301 includes multiple product radial porous tubes 3012, which are connected to the product conveying pipe 302. Product inlet holes 3013 are evenly distributed on the product radial porous tubes 3012, which can ensure that the product smoothly enters the product radial porous tubes 3012 through the product inlet holes 3013.

[0084] The reaction product collection device 30 includes an automatic product discharge control device 303 connected to the product delivery pipe 302. The automatic product discharge control device 303 operates automatically. When the pressure inside the receiving chamber 101 reaches a preset pressure, the automatic product discharge control device 303 automatically opens; when the pressure inside the receiving chamber 101 approaches atmospheric pressure and the product flow rate is lower than a preset value, the automatic product discharge control device 303 automatically closes. Preferably, the preset value is 0.001 ml / min. Specifically, the automatic product discharge control device 303 includes a valve connected in series with the product delivery pipe 302; the pressure inside the receiving chamber 101 can be detected by a pressure sensor installed in the product delivery pipe 302.

[0085] In one embodiment of the present invention, the experimental apparatus includes an abnormal pressure control mechanism 205, which is connected to the accommodating cavity 101. When the pressure inside the accommodating cavity 101 exceeds the pressure relief value, the abnormal pressure control mechanism 205 activates to release air, thus preventing safety accidents caused by the inability to promptly remove output when the output enters the tray 301 or the output conveying pipe 302 becomes blocked. The pressure relief value is a pressure value exceeding a preset pressure value by a certain range; preferably, the pressure relief value exceeds the preset pressure value by 10%. Figure 2 As shown, the air inlet of the abnormal pressure control mechanism 205 is located between the first baffle plate 105 and the cover 103.

[0086] Before the reaction, when initially filling the accommodating chamber 101 with gas, the accommodating chamber 101 is first evacuated to a vacuum, and then gas is injected into the accommodating chamber 101 through the gas inlet pipe 202. When the pressure of the accommodating chamber 101 monitored by the abnormal pressure control mechanism 205 is greater than 1 atm, the abnormal pressure control mechanism 205 is in the open state until the composition of the gas at the outlet of the abnormal pressure control mechanism 205 is less than 0.01% different from the composition in the gas inlet pipe 202, and the initial gas injection ends to ensure that the air in the accommodating chamber 101 is discharged.

[0087] like Figure 1 As shown, the reaction product collection device 30 includes a condensation mechanism 310 and a liquid collection cylinder 311. The collected reaction products flow through the condensation mechanism 310, and the condensed liquid flows into the liquid collection cylinder 311. The condensation mechanism 310 separates the liquid and gas in the reaction products, and the liquid collection cylinder 311 collects the liquid for measurement. Preferably, the volume of the liquid collection cylinder 311 is greater than 500 ml.

[0088] Furthermore, the condensation mechanism 310 includes a vertically arranged condenser tube 3101, with a liquid outlet 3102 at the lower end of the condenser tube 3101, allowing the collected reaction products to flow upwards within the condenser tube 3101. Figure 1As shown, the reaction product inlet of the condenser 3101 is located near the lower end of the condenser 3101, and the gas outlet is located at the upper end of the condenser 3101. The reaction product enters from the reaction product inlet and flows out from the bottom to the top. The condensed liquid flows into the liquid collection cylinder 311 through the liquid outlet 3102, and the gas after condensation flows out through the gas outlet.

[0089] The condenser tube 3101 is equipped with a condensate flow channel, through which condensate flows to cool the condenser tube 3101. A condenser cylinder is located outside the liquid collection cylinder 311, used to cool the liquid collection cylinder 311. The condenser cylinder has a condensate flow channel connected to the condensate flow channel of the condenser tube 3101, which is connected to a condensate control mechanism 312, which supplies condensate. Preferably, the temperature of the condensate is less than 20°C, ensuring that all C5+ and higher compounds in the product are condensed into liquid. The flow rate can be automatically controlled by the condensate control mechanism 312.

[0090] like Figure 1 As shown, the reaction product collection device 30 includes a gas collection mechanism 3140, which includes a water bottle 317, a water discharge collection bottle 318, and a gas collection bag 316 disposed inside the water bottle 317. The gas outlet of the condensation mechanism 310 is connected to the gas collection bag 316, and the water bottle 317 is connected to the water discharge collection bottle 318. After condensation, the gas flows out from the gas outlet of the condensation mechanism 310 and flows into the gas collection bag 316 through the gas delivery pipe 319. The gas collection bag 316 is elastic and gradually expands, causing the water in the water bottle 317 to flow into the water discharge collection bottle 318. The amount of water collected in the water discharge collection bottle 318 is recorded as the amount of gas collected in the gas collection bag 316, which facilitates the calculation of the amount of gas collected.

[0091] In one embodiment of the present invention, the reaction product collection device 30 includes a gas sampling and collection mechanism 3130, which includes a gas sampling bottle 315 and at least two one-way control valves 314. The gas sampling bottle 315 and the at least two one-way control valves 314 are connected to a gas delivery pipe 319 between a condensing mechanism 310 and a gas collection mechanism 3140. The at least two one-way control valves 314 are located between the gas collection mechanism 3140 and the condensing mechanism 310, and the gas sampling bottle 315 is disposed between the at least two one-way control valves 314. The one-way control valves 314 allow gas to flow in the direction from the condensing mechanism 310 to the gas sampling and collection mechanism 3130. The one-way control valves 314 are installed at both ends of the gas sampling bottle 315. The gas sampling bottle 315 is used to collect stage-produced gases at different temperatures. The two one-way control valves 314 prevent the gas collected by the gas sampling bottle 315 from mixing with the gas collected in the gas collection bag 316 at a previous temperature. A measuring instrument 313 is connected to the inlet of the gas sampling bottle 315. Gas flows through the measuring instrument 313 and then enters the gas sampling bottle 315. Independent gas sampling at different temperature stages facilitates accurate analysis of gases generated at different temperatures. During gas collection, both one-way control valves 314 are open, and the gas delivered by the gas delivery pipe 319 enters the gas collection bag 316. When collecting a gas sample, the lower one-way control valve 314 is closed, and the gas delivered by the gas delivery pipe 319 enters the gas sampling bottle 315 to collect the gas sample. After collection, the lower one-way control valve 314 is opened, and the gas delivered by the gas delivery pipe 319 enters the gas collection bag 316.

[0092] In one embodiment of the present invention, the reaction product collection device 30 includes an excess product collection mechanism 34, which includes a temporary storage device 305, a first control valve 304, and a second control valve 309. The temporary storage device 305 is connected to the product delivery pipe 302 in the reaction product collection device 30 through the first control valve 304. When the product flow rate at the inlet of the first control valve 304 exceeds a preset flow rate value, the first control valve 304 connects the temporary storage device 305 to the product delivery pipe 302, allowing the product in the product delivery pipe 302 to be discharged. The product flows into the temporary storage unit 305 through the first control valve 304; the temporary storage unit 305 is connected to the product delivery pipe 302 through the second control valve 309. When the product flow rate at the inlet of the first control valve 304 is less than the preset flow rate value, the second control valve 309 connects the temporary storage unit 305 to the product delivery pipe 302, and the product in the temporary storage unit 305 can flow into the product delivery pipe 302 through the second control valve 309; the accommodating cavity 101, the first control valve 304, the second control valve 309 and the condensing mechanism 310 are distributed sequentially along the product delivery pipe 302.

[0093] When the output flow rate exceeds the preset value, the first control valve 304 automatically opens, and the diverted output enters the temporary storage unit 305 for temporary storage. Figure 1 As shown, the first control valve 304 can be a three-way valve. The first control valve 304 is connected in series with the product delivery pipe 302. When the product flow rate does not exceed the preset flow rate value, only the valve leading to the condensing mechanism 310 is opened. When the product flow rate exceeds the preset flow rate value, the valve leading to the temporary storage unit 305 is automatically opened to control the flow rate to the condensing mechanism 310. Preferably, the preset flow rate value is 5 ml / min.

[0094] The second control valve 309 can be a flow diversion control valve. The second control valve 309 is used to automatically control the output in the temporary storage 305 to flow back into the output delivery pipe 302 and flow to the condensing mechanism 310. When the output flow detected by the first control valve 304 is less than the preset flow value, the second control valve 309 opens, controlling the total flow rate entering the condensing mechanism 310 through the second control valve 309 and the first control valve 304 to be less than or equal to the preset flow value.

[0095] Temporary storage device 305 is used for temporary storage of excess output, which can prevent the oil and gas from mixing when the output discharged from the vessel 10 is greater than the condensation capacity of the condensation mechanism 310.

[0096] Furthermore, the temporary storage unit 305 includes a temporary storage chamber 3051, a buffer 306, and a movable piston 307. The movable piston 307 is located between the temporary storage chamber 3051 and the buffer 306. Both the first control valve 304 and the second control valve 309 are connected to the temporary storage chamber 3051. The temporary storage chamber 3051 and the buffer 306 are sealed together by the movable piston 307, which is made of carbon rubber. The sidewalls of the temporary storage chamber 3051 can be made of a titanium-nickel-copper-iron alloy. Preferably, the combined volume of the temporary storage chamber 3051 and the buffer 306 is greater than 10 liters. The buffer 306 is connected to a product leakage detection component 308, which is used to detect the gas composition within the buffer 306, ensuring that the product in the temporary storage unit 305 does not enter the buffer 306 through the movable piston 307.

[0097] In one embodiment of the present invention, the heating device 40 includes a heater 401 that surrounds the vessel body 10 for heating the vessel body 10. The heater 401 can be a resistance heater with a maximum temperature of 1200°C. Further, the heating device 40 includes a first insulation layer 402 surrounding the heater 401. The first insulation layer 402 can be made of composite asbestos material, with a heat loss rate of less than 10% of the supplied heat. The heating device 40 is capable of slowly and uniformly heating the vessel body and accurately measuring and controlling the temperature.

[0098] In one embodiment of the present invention, a first temperature detector 403 is externally connected to the heater 401. The first temperature detector 403 may be a high-precision thermocouple, and multiple high-precision thermocouples are distributed on the surface of all heaters 401. The temperature control error of the first temperature detector 403 is less than 1°C.

[0099] Furthermore, a second temperature detector 404 is provided inside the accommodating cavity 101. The second temperature detector 404 can be a high-precision thermocouple, and the temperature control error of the second temperature detector 404 is less than 1℃. The second temperature detectors 404 are distributed inside the accommodating cavity 101, and a vertical rod is provided in the accommodating cavity, on which the second temperature detectors 404 are distributed.

[0100] In one embodiment of the present invention, the experimental apparatus includes a second insulation layer 405, which covers the portion of the product conveying pipe 302 located outside the vessel body 10. During the product collection process, crude oil is easily precipitated due to temperature drop. By setting the second insulation layer 405, the blockage caused by crude oil precipitation during product collection can be reduced. The second insulation layer 405 can be made of composite asbestos material, with a heat loss rate of less than 10% of the heating supply heat. Heaters 401 are respectively installed outside the components of the reaction product collection device 30 before entering the condensation mechanism 310, and outside the pipes of the gas supply control mechanism 201, and are covered by the second insulation layer 405 for heating and insulation of the relevant components. Heating and insulation from the gas supply control mechanism and the vessel body to before the product enters the condensation mechanism helps maintain temperature stability and effectively overcomes the defect of easy blockage due to oil precipitation at lower temperatures.

[0101] This experimental setup, under set temperature and pressure conditions, simulates the entire process of oil and gas production during in-situ underground thermal conversion of organic matter. It obtains the production volume and composition of oil and gas at different stages of the in-situ thermal conversion, providing technical support and means for establishing a kinetic model and phase equilibrium analysis of organic matter in-situ thermal conversion. Compared to applying only overburden pressure, this experimental setup can apply fluid pressure, more realistically reflecting the control of pressure on the production volume of oil and gas during organic matter in-situ thermal conversion. The first and second baffles effectively prevent sample fragments from entering the product delivery pipe and inlet pipe, thus preventing blockage. The reaction product collection device 30 is fully enclosed to prevent the volatilization and loss of products during collection, reducing product volatilization and improving the accuracy of product measurement. This experimental setup improves the accurate measurement of oil and gas production during organic matter in-situ thermal conversion, which is of great significance for further refining the theoretical and technical models of reaction kinetics, phase equilibrium, and recoverable oil and gas resource evaluation in organic matter in-situ thermal conversion, and promoting basic laboratory research and the development of related disciplines.

[0102] Preferably, in the reaction product collection device 30, the pipelines from the product inlet plate 301 to the condensation mechanism 310 are all made of titanium-nickel-copper-iron alloy. The temporary storage chamber 3051, the buffer, and the product delivery pipe 302 can also be made of titanium-nickel-copper-iron alloy. The air inlet pipe 202 is made of titanium-nickel-copper-iron alloy, and the air inlet chassis 204 and the product inlet plate 301 are also made of titanium-nickel-copper-iron alloy. This avoids corrosion from simulated heat and products such as H2S, and reduces deformation.

[0103] The above descriptions are merely a few embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. An experimental apparatus for in-situ heating and conversion of organic matter into oil and gas, characterized in that, include: The vessel body has a cavity for holding an organic sample; the first end of the cavity is the upper end, and the second end is the lower end; the vessel body is connected to a first baffle plate and a second baffle plate, the first baffle plate being located at the first end of the cavity, and the second baffle plate being located at the second end of the cavity, the organic sample being filled between the first baffle plate and the second baffle plate; the first baffle plate has a first vent hole; the second baffle plate has a second vent hole; A heating device capable of heating the vessel body; An air intake device is connected to the first end of the accommodating cavity and is used to deliver fluid into the accommodating cavity; the air intake device includes an air intake chassis and an air intake pipe, the air intake chassis is disposed at the first end of the accommodating cavity and is located on the side of the first baffle plate opposite to the accommodating cavity; the air intake chassis is provided with a plurality of air outlets, and the plurality of air outlets are all connected to the air intake pipe; A reaction product collection device, connected to the second end of the accommodating cavity, is used to collect the products of the organic sample in the accommodating cavity. The reaction product collection device includes a product inlet tray, a product delivery pipe, and an excess product collection mechanism. The product inlet tray is located at the second end of the accommodating cavity and on the side of the second baffle plate opposite to the accommodating cavity. The product inlet tray has multiple product inlet holes, all of which are connected to the product delivery pipe. A second insulation layer is wrapped around the portion of the product delivery pipe outside the reactor body. The excess product collection mechanism includes a temporary storage device for temporarily storing excess product. An abnormal pressure control mechanism is connected to the accommodating cavity. When the pressure inside the accommodating cavity exceeds the pressure relief value, the abnormal pressure control mechanism starts to release air.

2. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 1, characterized in that, The first baffle includes a first breathable baffle, a second breathable baffle, and a third breathable baffle that are sequentially distributed along the direction from the first end of the accommodating cavity to the second end of the accommodating cavity; The diameter of the first vent hole in the first breathable partition, the diameter of the first vent hole in the second breathable partition, and the diameter of the first vent hole in the third breathable partition decrease sequentially.

3. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 2, characterized in that, The first vent hole of the first breathable partition has a diameter of 200 micrometers, the first vent hole of the second breathable partition has a diameter of 100 micrometers, and the first vent hole of the third breathable partition has a diameter of 50 micrometers.

4. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 1, characterized in that, The second baffle includes a fourth, a fifth, and a sixth ventilated baffle that are sequentially distributed along the direction from the first end of the accommodating cavity to the second end of the accommodating cavity; The diameters of the second vent holes in the fourth ventilated partition, the fifth ventilated partition, and the sixth ventilated partition increase sequentially.

5. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 4, characterized in that, The second vent hole of the fourth ventilated partition has a diameter of 100 micrometers, the second vent hole of the fifth ventilated partition has a diameter of 200 micrometers, and the second vent hole of the sixth ventilated partition has a diameter of 300 micrometers.

6. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 1, characterized in that, The reaction product collection device includes a condensation mechanism and a liquid collection cylinder. The collected reaction products flow through the condensation mechanism, and the condensed liquid flows into the liquid collection cylinder.

7. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 6, characterized in that, The condensation mechanism includes a vertically arranged condenser tube with a liquid outlet at the lower end, allowing the collected reaction products to flow upwards within the condenser tube.

8. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 6, characterized in that, The reaction product collection device includes a gas collection mechanism, which includes a water bottle, a discharge water collection bottle, and a gas collection bag disposed inside the water bottle. The gas outlet of the condensation mechanism is connected to the gas collection bag, and the water bottle is connected to the discharge water collection bottle.

9. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 8, characterized in that, The reaction product collection device includes a gas sampling and collection mechanism, which includes a gas sampling bottle and at least two one-way control valves. The gas sampling bottle and at least two one-way control valves are connected to a gas delivery pipe between the condensation mechanism and the gas sampling and collection mechanism. At least two one-way control valves are located between the gas collection mechanism and the condensation mechanism, and the gas sampling bottle is located between the at least two one-way control valves.

10. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 6, characterized in that, The excess product collection mechanism also includes a first control valve and a second control valve. The temporary storage device is connected to the product delivery pipe in the reaction product collection device through the first control valve. When the product flow rate at the inlet of the first control valve exceeds the preset flow rate value, the first control valve connects the temporary storage device to the product delivery pipe, and the product in the product delivery pipe can flow into the temporary storage device through the first control valve. The temporary storage device is connected to the output conveying pipe through the second control valve. When the output flow rate at the inlet of the first control valve is less than the preset flow rate value, the second control valve connects the temporary storage device to the output conveying pipe, and the output in the temporary storage device can flow into the output conveying pipe through the second control valve. The accommodating cavity, the first control valve, the second control valve, and the condensation mechanism are sequentially distributed along the product delivery pipe.

11. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 10, characterized in that, The temporary storage device includes a temporary storage chamber, a buffer, and a movable piston disposed between the temporary storage chamber and the buffer. Both the first control valve and the second control valve are connected to the temporary storage chamber.

12. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 1, characterized in that, The vessel body includes a cap and a vessel body. The accommodating cavity is located in the vessel body. The vessel body has a body opening for filling shale samples. The cap is installed in the body opening.

13. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 12, characterized in that, A sealing ring is provided between the capping device and the vessel body, and the sealing ring is made of carbon rubber.

14. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 1, characterized in that, The heating device includes a heater that surrounds the vessel body.

15. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 14, characterized in that, The heating device includes a first insulation layer that surrounds the heater.

16. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 14, characterized in that, The heater is externally connected to a first temperature detector.

17. The experimental apparatus for in-situ heating and conversion of organic matter into oil and gas production according to claim 14, characterized in that, A second temperature detector is installed inside the accommodating cavity.

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