A simulation device for online determination of oil and gas generation and its use method

Abstract

The present invention relates to the field of geological exploration technology, specifically to a simulation device for online determination of oil and gas generation, including a simulation component, which includes a slot plate, a pressure seat arranged on both sides of the slot plate, an extrusion part and a filtering and outlet part arranged on the two pressure seats, and a heating furnace barrel rotating in the middle of the slot plate; an auxiliary component, which includes a linkage part connecting the heating furnace barrel and the base, and a cleaning part for cleaning the gold tube; an injection component, which includes a feeding part. By combining the heating furnace with the confining pressure and the axial pressure, the oil and gas generation process of the source rock under the geological temperature and pressure conditions is simulated to obtain more representative oil and gas samples; by the linkage and integration of the furnace barrel, the pressure seat and the cleaning part, the gold tube reaction chamber can be efficiently loaded, sampled and cleaned; by continuous collection in the constant temperature sample chamber, the full oil and gas components generated in different thermal evolution stages can be obtained, and in-situ spectral measurement can be achieved through the window of the sample chamber.

Description

Technical Field

[0001] The invention relates to the technical field of geological exploration, and in particular to a simulation device for online determination of oil and gas generation and a use method thereof. Background Art

[0002] Oil and natural gas are formed by long-term thermal evolution of organic-rich source rocks in a high-temperature and high-pressure environment. The oil and gas content and composition generated and discharged at different thermal evolution stages are different. Oil and gas resources are mainly distributed in composite oil and gas basins containing multiple sets of potential source rocks. Source rocks in different structural regions / strata often have different oil and gas generation and evolution processes. Therefore, accurately establishing the oil and gas generation model of typical source rocks is of great significance for guiding my country's oil and gas exploration.

[0003] In a composite oil and gas basin, various oil and gas components generated by different source rocks will undergo component fractionation due to primary and secondary migration, and oil and gas accumulation may also be subject to different types and degrees of secondary transformation, making it difficult to collect end-member oil and gas samples generated by source rocks at different thermal evolution stages from the drilling platform. More importantly, under geological conditions, oil and natural gas components usually coexist, and during the sampling process on the drilling platform, gaseous hydrocarbons and some light liquid hydrocarbons will be lost to varying degrees, resulting in differences between the collected samples and the oil and gas generated by the actual source rocks. How to obtain representative oil and gas samples has always been a difficult problem faced in studying the oil and gas generation model of source rocks.

[0004] Laboratory hydrocarbon generation and expulsion experiments can simulate the hydrocarbon generation and expulsion process of source rocks under geological conditions, and can obtain oil and gas products at different thermal evolution stages, which provides an important way to study the generation mode of oil and gas during the thermal evolution of source rocks. However, there is still a lack of perfect experimental equipment for this purpose, and there are two main problems: first, it is difficult to collect the full oil and gas components generated at each thermal evolution stage under geological temperature and pressure conditions; second, it is difficult to carry out relevant in-situ tests on the collected full oil and gas components (for example, in-situ laser Raman, in-situ fluorescence spectroscopy, gas-oil ratio (GOR), etc.). In view of this, it is urgent to develop a simulation device for online determination of oil and gas generation. The development of this equipment has important practical significance for establishing the oil and gas generation mode of source rocks and accurately evaluating the oil and gas resource potential under geological conditions. Summary of the invention

[0005] The present invention provides a simulation device for online determination of oil and gas generation and a method of using the same to solve the above problems.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A simulation device for online determination of oil and gas generation, comprising:

[0008] The simulation component includes a slot plate, a pressure seat arranged on both sides of the slot plate, an extrusion part and a filtering and outlet part arranged on the two pressure seats, a heating furnace drum rotating in the middle of the slot plate, and a gold tube arranged in the heating furnace drum and forming a closed annular gap, and an elastic ring bag is arranged on the inner side of the pressure seat to seal the port of the gold tube;

[0009] The auxiliary component includes a linkage part connecting the heating furnace drum and the base, a cleaning part for cleaning the gold tube, and a hydraulic system capable of injecting a liquid medium into the closed annular gap, the elastic annular bag, and the inside of the cleaning part separately, wherein the medium is a cleaning liquid;

[0010] The injection assembly comprises a feed part, and a retention and injection part arranged below the feed part and connected with the filtering and outlet part, wherein the feed part comprises a plurality of top plates arranged in a horizontal and continuous manner, and parallel current conducting grooves are provided on both sides of the bottom of the top plates;

[0011] The sample chamber comprises a chamber body and a sapphire wafer sealing the chamber body. The chamber body has nozzles at both ends and electric heating wires inside the two sides. Both ends of the electric heating wires are electrically connected to wire posts, which are vertically installed at the four corners of the chamber body.

[0012] The power supply requirement of the heating wire is realized by contacting the conductive grooves at different positions with the conductive column. When the sample chamber is being transported and fed, the interception and injection part intercepts the sample chamber and pushes open the nozzle, thereby realizing the injection of sample oil and gas.

[0013] As a preferred solution of the present invention, the pressure seat includes a base whose bottom is slidably connected to the two sides of the groove plate, an electric cylinder whose two ends are connected to the sides of the base, and a pipe seat installed on the upper inner side of the base;

[0014] The tube seat has a large diameter cylindrical section on the outside and a small diameter cylindrical section on the inside, the inner ring of the elastic ring bag is correspondingly sleeved on the small diameter cylindrical section, a through hole 1 is opened at the center of the tube seat, and a through hole 2 is opened inside the base corresponding to the first through hole, and the through hole 1, the through hole 2 and the inner cavity of the gold tube are on the same straight line;

[0015] The gold tube is in the shape of a barbell, the inside of its two ends are respectively matched with elastic ring bags, and the outside of its two ends are respectively attached to the inner walls of the two ends of the heating furnace drum and sealed by sealing rings to form the closed annular gap between the heating furnace drum and the gold tube;

[0016] Among them, the closed annular gap is connected to an inlet pipe 1 at the top of the heating furnace drum and is connected to an exhaust pipe 1 at the bottom of the heating furnace drum. The two elastic ring bags are respectively connected to an inlet pipe 2 at the top of the tube seat and are connected to an exhaust pipe 2 at the bottom of the tube seat.

[0017] As a preferred solution of the present invention, the extrusion part includes an electric cylinder 2 and an extrusion plug connected to the end of the telescopic rod of the electric cylinder 2, and the electric cylinder 2 is installed outside the base on one side;

[0018] The telescopic rod can push the extrusion plug into the inner cavity of the gold tube through the through hole 1 and the through hole 2 on the side, and the extrusion plug is adapted to the inner cavity of the middle section of the gold tube.

[0019] As a preferred solution of the present invention, the filtering and exporting part includes a sealing plug tube provided on the inner side of the base on the other side, and a filtering quartz wool sleeved on the inner end of the sealing plug tube;

[0020] Among them, the head plug tube is installed correspondingly at the inner end of the tube seat on the other side, the head plug tube is adapted to the inner cavity of the middle section of the gold tube, and a through hole three connected with through holes one and two on the other side is opened at the center of the head plug tube. Through holes one, two and three on the other side constitute an outlet channel.

[0021] As a preferred solution of the present invention, the linkage part includes a cam installed at the bottom of the heating furnace shaft, a push-pull rod hinged to the protrusions on both sides of the cam, a piston hinged to the outer end of the push-pull rod, a spring provided at the outer end of the piston, and a sleeve slidably fitted on the outside of the piston, one end of the sleeve is respectively connected to the inner side of the bottom of the base;

[0022] Wherein, a notch is provided on the side of the sleeve for the push-pull rod to move, and the external force applied to the spring during initial compression is greater than the resistance of the heating furnace drum shaft during rotation.

[0023] As a preferred solution of the present invention, the cleaning part includes a side arm installed on the side of the base on the other side, a slide groove installed on the outer end of the side arm, a slide bar matched inside the slide groove, a machine head tube installed on the outside of the slide bar, and a folding bellows arranged inside the machine head tube, and also includes an electric cylinder three installed inside the side arm, and the telescopic end of the electric cylinder three is connected to one end of the slide bar;

[0024] The machine head tube and the folded bellows both have a closed end and an open end, the open end of the folded bellows is connected to the inside of the machine head tube to form a closed chamber, and the outer diameter of the open end of the machine head tube is consistent with the inner diameter of the middle section of the gold tube;

[0025] The closed chamber is connected to an inlet pipe 3 at the top of the head pipe and an exhaust pipe 3 at the bottom of the head pipe;

[0026] The cleaning part also includes a nozzle disposed in the wall of the opening end of the head tube;

[0027] The nozzle is connected to an inlet pipe 4 at the top of the head pipe;

[0028] The hydraulic system includes a liquid tank and a high-pressure pump. The inlet of the high-pressure pump is connected to the outlet of the liquid tank and the discharge pipe three through a three-way valve, and the outlet of the high-pressure pump is connected to the inlet pipe one, two inlet pipes two, inlet pipe three and inlet pipe four through a valve group.

[0029] As a preferred solution of the present invention, the feeding part includes a bottom plate arranged parallel to the bottom of the top plate, grooves opened parallel to both sides of the top of the bottom plate, a material bin installed at one end of the top of the bottom plate, and an electric cylinder 4 installed at one end of the bottom plate for sequentially pushing the sample bin in the material bin into the gap between the bottom plate and the top plate;

[0030] Among them, a bracket is horizontally installed below one side of the silo, and the top plate is hoisted at the bottom of the bracket in turn. The top plate close to one end of the silo is set as a first conductive plate, and its length is greater than the remaining top plates.

[0031] As a preferred solution of the present invention, the interception and injection part includes a clamping claw arranged below the bottom plate and directly below the first conductive plate, a base plate installed on the top of the claw teeth on both sides of the clamping claw, a conduit installed on one side of the inside of the base plate, an injection tube installed at one end of the conduit, a side hole opened at the port of the injection tube, and a blocking rod slidably fitted on the other side of the inside of the base plate;

[0032] The other end of the conduit on one side is connected to an insulation pipe, one end of the insulation pipe is connected to the outlet channel, the insulation pipe is also connected to a pressure gauge and a vacuum pump 1, the other end of the conduit on the other side is connected to a vacuum pump 2, a flow meter is connected in series between the vacuum pump 2 and the conduit on the other side, and the outlet of the vacuum pump 2 is connected to a gas tank;

[0033] Among them, the height of the seat plate is between the bottom plate and the top plate, the end of the baffle rod close to the bottom plate is a square rod end, and the other end is a round handle end. The outer sleeve of the round handle end is provided with a spring three. When the square rod end contracts toward the inside of the seat plate, the spring three will be compressed, so that the square rod end has a tendency to move outward and reset.

[0034] As a preferred solution of the present invention, the sample chamber further comprises pressure plates respectively installed at the top and bottom of the chamber body for fixing the sapphire wafer, side plates respectively installed at the middle of both sides of the chamber body, and sliders installed at both sides of the bottom of the pressure plate at the bottom, and the interval width of the sliders and the grooves is adapted;

[0035] The nozzle comprises an inlet and outlet pipe installed in the middle of both ends of the bin body, a through hole 4 opened inside the inlet and outlet pipe and connected with the inside of the bin body, a spring 2 arranged inside the through hole 4, and a small ball arranged at the outer end of the spring 2;

[0036] Among them, the through hole four has a first section at the inner end, a second section at the outer end, and a third section in the middle for accommodating the spring 2 and the ball. The inner diameters of the first and second sections are consistent with the outer diameter of the injection tube. There is a smooth transition between the second and third sections, and the inner diameter of the third section is larger than the inner diameter of the second section.

[0037] A method for using a simulation device for online determination of oil and gas generation comprises the following steps:

[0038] Step 1: The bases on both sides move away from each other and drive the heating furnace to rotate through the linkage part, and the source rock plunger sample and the reservoir sample are filled into the gold tube in turn, and then the structure is reset, and the sample bin at the bottom of the bin is pushed under the first conductive plate by the electric cylinder 4, and at the same time, the clamping claw performs a partial process of contraction, so that the blocking rod extends into the gap between the first conductive plate and the bottom plate, thereby blocking the pushed sample bin, and then the clamping claw contracts again, so that the injection tube is inserted into the nozzle to achieve communication, and then the power-on guide groove of the first conductive plate is energized, so that the heating wire works according to the set voltage to achieve the desired simulated formation temperature;

[0039] Step 2: The hydraulic system injects high-pressure cleaning liquid into the two elastic ring bags in turn to make them expand and squeeze the two ends of the gold tube close to the heating furnace drum to achieve plugging, and then injects high-pressure cleaning liquid into the closed annular gap to make it expand, so as to achieve the confining pressure simulated around the sample, close the valve between the outlet channel and the insulation pipe, and evacuate the sample chamber through a vacuum pump, and then start heating the heating furnace drum to simulate the formation temperature during hydrocarbon generation and expulsion;

[0040] Step 3: Push the extrusion plug into the gold tube and apply force to squeeze the sample to simulate the pressure during hydrocarbon generation and expulsion. Open the valve between the outlet channel and the insulation tube to allow the generated oil and gas to be filled into the sample chamber. After the flow meter reading is stable, close the valve between the outlet channel and the insulation tube again. At the same time, the clamp resets and releases the sample chamber to separate the injection tube from the nozzle, so that the oil and gas are sealed in the sample chamber.

[0041] Step 4: The sample bin currently at the bottom layer in the bin continues to be pushed under the first conductive plate by the electric cylinder 4 until the previous sample bin storing oil and gas is pushed under the adjacent top plate by the sample bin. At this time, the first conductive plate changes the input voltage to simulate the next set formation temperature, and at the same time, the heating furnace changes the heating power, which is also used to simulate the next set formation temperature that matches it, while the adjacent top plate is fed with the set formation temperature required in the previous sample bin, and the sample bin continues to be heated at a constant temperature to keep the oil and gas samples stable.

[0042] Step 5. Repeat the above steps, and the sample chamber in the injection assembly will be injected with the simulated oil and gas component samples of each set temperature point in turn, and when being transported by the feeding part, different top plates will be connected with different specified voltages, so that the sample chamber under each top plate can always be heated and insulated to match the formation temperature of the sample inside it. The simulation experiment is carried out using multiple sample chambers, which avoids the risk of cross-contamination of samples. At the same time, without affecting the efficiency of the simulation experiment, the constant temperature heating time of the samples can be extended, thereby ensuring the authenticity of the simulated samples;

[0043] Step 6: When the sample bins are pushed out of the bottom plate one by one, the spectral characteristics and parameters of the oil and gas in each sample bin are observed online one by one, and finally the spectral characteristics of the oil and gas components in each evolution stage can be determined.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. The present invention forms a closed annular gap in the heating furnace tube, combines the confining pressure and the axial pressure on both sides, thereby simulating the hydrocarbon generation and expulsion process of the source rock under the geological temperature and pressure environment, and can completely collect all the oil and gas components generated by the source rock at different thermal evolution stages, providing more representative samples for establishing the oil and gas generation model of the source rock.

[0046] 2. The present invention uses the linkage part to drive the heating furnace drum to rotate and reset when the base moves through the push-pull rod. Under the above-mentioned effect, the gold tube can be exposed, which is convenient for loading samples during the experiment and cleaning samples after the experiment. By integrating the liquid medium in the hydraulic system with the cleaning liquid, the inner wall of the gold tube is cleaned, cross contamination of samples is avoided, and the cleaning efficiency and effect are improved.

[0047] 3. The sample bin in the present invention collects the oil and gas components generated at different set temperature points in turn, and when being transported by the feeding part, different top plates will be connected to different specified voltages, so that the sample bin under each top plate can always match the generation temperature of the sample inside it, and use multiple sample bins to continuously collect samples, so as to efficiently obtain the oil and gas components generated at different thermal evolution stages; at the same time, the in-situ test of all oil and gas components can be achieved through the window of the sample bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0049] Figure 2 It is a schematic diagram of the structure of the simulation component of the present invention;

[0050] Figure 3 It is a schematic diagram of the heating furnace drum and the gold tube structure of the present invention;

[0051] Figure 4It is a schematic diagram of the pressure seat structure of the present invention;

[0052] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0053] Figure 6 for Figure 4 Another perspective diagram of the structure;

[0054] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0055] Figure 8 It is a schematic diagram of the connection between the hydraulic system and the simulation component of the present invention;

[0056] Fig. 9 It is a schematic diagram of the auxiliary component structure of the present invention;

[0057] Fig.10 It is a schematic diagram of the linkage structure of the present invention;

[0058] Fig.11 It is a schematic diagram of the structure of the cleaning part of the present invention;

[0059] Fig.12 for Figure 4 Schematic diagram of the structure in the figure;

[0060] Fig.13 for Fig.12 Another perspective diagram of the structure;

[0061] Fig.14 It is a schematic diagram of the heating furnace drum of the present invention after it is rotated and aligned with the cleaning part;

[0062] Fig.15 It is a schematic diagram of the structure of the injection assembly of the present invention;

[0063] Fig.16 for Fig.15 Another perspective diagram of the structure;

[0064] Fig.17 It is a schematic structural diagram of the feeding part of the present invention;

[0065] Fig.18 It is a schematic diagram of the structure of the partial interception and injection part of the present invention;

[0066] Fig.19 for Fig.18 Schematic diagram of the decomposition of the middle part structure;

[0067] Fig. 20 It is a schematic diagram of the sample bin structure of the present invention;

[0068] Fig.21for Fig. 20 Schematic diagram of the structure.

[0069] Fig. 22 It is a simplified schematic diagram of the arrangement of the heating wires of the present invention;

[0070] Fig.23 It is a schematic diagram of the internal structure of the nozzle of the present invention;

[0071] Fig.24 It is a schematic diagram of the cooperation between the sample chamber of the present invention and the injection assembly during transportation;

[0072] Fig.25 for Fig.24 Enlarged schematic diagram of point C in the middle.

[0073] Among them, 1. simulation component; 101. groove plate; 102. heating furnace drum; 103. gold tube; 104. sealing ring; 105. base; 106. electric cylinder one; 107. tube seat; 108. elastic ring capsule; 109. electric cylinder two; 110. extrusion plug; 111. head plug tube; 112. filter quartz wool; 2. auxiliary components; 201. cam; 202. push-pull rod; 203. piston; 204. spring one; 205. sleeve; 206. machine head tube; 207. folding bellows; 208. nozzle; 209. side arm; 210. slide groove; 211. slide bar; 212. electric cylinder three; 213. liquid tank ; 214, high pressure pump; 3, injection assembly; 301, bottom plate; 302, groove; 303, silo; 304, top plate; 305, power guide groove; 306, electric cylinder four; 307, clamping jaws; 308, seat plate; 309, catheter; 310, injection tube; 311, stop rod; 312, insulation tube; 313, vacuum pump one; 314, vacuum pump two; 315, gas tank; 4, sample bin; 401, bin body; 402, inlet and outlet pipe; 403, spring two; 404, small ball; 405, heating wire; 406, wire column; 407, side plate; 408, pressure plate; 409, sapphire wafer; 410, slider. DETAILED DESCRIPTION

[0074] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0075] like Figure 1 As shown, the embodiment of the present invention provides a simulation device for online determination of oil and gas generation, including a simulation component 1, such as Figure 2-7As shown, it includes a slot plate 101, a filter slot arranged at the bottom of the slot plate 101, pressure seats arranged on both sides of the slot plate 101, an extrusion part and a filtering and outlet part arranged on the two pressure seats, a heating furnace drum 102 rotating in the middle of the slot plate 101, and a gold tube 103 arranged in the heating furnace drum 102 and forming a closed annular gap, and an elastic ring bag 108 is provided on the inner side of the pressure seat to seal the port of the gold tube 103.

[0076] The above-mentioned pressing seat includes a base 105 whose bottom is slidably connected to the two sides of the groove plate 101, an electric cylinder 106 whose two ends are connected to the sides of the base 105 on both sides, and a pipe seat 107 installed on the upper inner side of the base 105.

[0077] Among them, the tube seat 107 has a large diameter cylindrical section on the outside and a small diameter cylindrical section on the inside. The inner circle of the elastic ring bag 108 is correspondingly mounted on the small diameter cylindrical section. A through hole 1 is opened in the center of the tube seat 107, and a through hole 2 is opened inside the base 105 corresponding to the through hole 1. Through hole 1, through hole 2 and the inner cavity of the gold tube 103 are on the same straight line.

[0078] The gold tube 103 is barbell-shaped, and its two ends are respectively matched with the elastic ring bag 108, and its two ends are respectively attached to the inner walls of the two ends of the heating furnace cylinder 102 and sealed by the sealing ring 104 to form a closed annular gap between the heating furnace cylinder 102.

[0079] In this embodiment, Figure 3 As shown, the heating furnace drum 102 has an inner and outer double-drum design, which are nested with each other, and an electric heating device is arranged between the two to enable it to have a heating function.

[0080] The closed annular gap is connected to an inlet pipe 1 at the top of the heating furnace drum 102 and a discharge pipe 1 at the bottom of the heating furnace drum 102. The two elastic ring bags 108 are connected to an inlet pipe 2 at the top of the tube seat 107 and a discharge pipe 2 at the bottom of the tube seat 107. Figure 3 As shown, after the high-pressure liquid is introduced into the closed annular gap, the confining pressure of the source rock environment can be simulated. When the source rock sample is subsequently discharged, the gold tube 103 is slightly collapsed due to the force, so that it fits tightly with the source rock, which is not conducive to the cleaning of the sample. Therefore, a pressure-balancing short tube is connected to the inlet pipe. When it is necessary to release the tight fit with the source rock, the closed annular gap is connected to the short tube, so that part of the liquid can be discharged automatically.

[0081] After high-pressure liquid is injected into the above-mentioned two elastic ring bags 108, it will expand and squeeze the two ends of the gold tube 103 close to the heating furnace tube 102 to achieve sealing. In this embodiment, the second row of pipes is opened, and when the elastic ring bag 108 elastically shrinks, part of the liquid will be squeezed out, thereby making it smaller, which is convenient for the separation between the two.

[0082] The extrusion part includes an electric cylinder 109 and an extrusion plug 110 connected to the end of the telescopic rod of the electric cylinder 109. The electric cylinder 109 is installed outside the base 105 on one side.

[0083] The telescopic rod can push the extrusion plug 110 into the inner cavity of the gold tube 103 through the through hole 1 and the through hole 2 on the side, and the extrusion plug 110 is adapted to the inner cavity of the middle section of the gold tube 103 .

[0084] The filtering and exporting part includes a sealing plug tube 111 arranged on the inner side of the base 105 on the other side, and a filtering quartz wool 112 sleeved on the inner end of the sealing plug tube 111 .

[0085] Among them, the end cap plug tube 111 is correspondingly installed at the inner end of the tube seat 107 on the other side, and the end cap plug tube 111 is adapted to the inner cavity of the middle section of the gold tube 103. A through hole three connected with through holes one and two on the other side is opened at the center of the end cap plug tube 111. Through holes one, two and three on the other side constitute a guide channel.

[0086] In this embodiment, Figure 9-14 As shown, the auxiliary component 2 includes a linkage part connecting the heating furnace drum 102 and the base 105, a cleaning part for cleaning the gold tube 103, and a hydraulic system capable of independently injecting liquid medium into the closed annular gap, the elastic annular bag 108, and the interior of the cleaning part.

[0087] The linkage part includes a cam 201 installed at the bottom of the rotating shaft of the heating furnace barrel 102, a push-pull rod 202 hinged to the protrusions on both sides of the cam 201, a piston 203 hinged to the outer end of the push-pull rod 202, a spring 204 arranged at the outer end of the piston 203, and a sleeve 205 slidingly fitted on the outside of the piston 203, one end of the sleeve 205 is respectively connected to the inner side of the bottom of the base 105.

[0088] A notch is provided on the side of the sleeve 205 for the push-pull rod 202 to move, and the external force applied to the spring 1 204 during initial compression is greater than the resistance of the heating furnace drum 102 during rotation of the rotating shaft.

[0089] Its operating state is that when the base 105 is away from the heating furnace drum 102 for a certain distance, the heating furnace drum 102 is driven to rotate horizontally for a certain angle through the push-pull rod 202. When the bases 105 are close to each other, the heating furnace drum 102 is immediately driven to rotate and reset through the push-pull rod 202.

[0090] Under the above effects, the gold tube 103 can be exposed, thereby facilitating the loading of samples during experiments and the cleaning of samples after experiments.

[0091] The cleaning part includes a side arm 209 installed on the side of the other side base 105, a slide groove 210 installed on the outer end of the side arm 209, a slide bar 211 fitted inside the slide groove 210, a machine head tube 206 installed on the outside of the slide bar 211, and a folded bellows 207 arranged inside the machine head tube 206. It also includes an electric cylinder three 212 installed inside the side arm 209, and the telescopic end of the electric cylinder three 212 is connected to one end of the slide bar 211.

[0092] Among them, the head tube 206 and the folded bellows 207 both have a closed end and an open end. The open end of the folded bellows 207 is connected to the inside of the head tube 206 to form a closed chamber. The outer diameter of the open end of the head tube 206 is consistent with the inner diameter of the middle section of the gold tube 103.

[0093] Among them, the closed chamber is connected to the inlet pipe three at the top of the head pipe 206 and is connected to the exhaust pipe three at the bottom of the head pipe 206.

[0094] The cleaning unit further includes a nozzle 208 disposed in the wall of the open end of the head tube 206 .

[0095] Among them, the nozzle 208 is connected to the inlet pipe 4 at the top of the head pipe 206.

[0096] In this embodiment, Figure 8-9 As shown, the hydraulic system includes a liquid tank 213 and a high-pressure pump 214. The inlet of the high-pressure pump 214 is connected to the outlet of the liquid tank 213 and the exhaust pipe 3 through a three-way valve, and the outlet of the high-pressure pump 214 is connected to the inlet pipe 1, the two inlet pipes 2, the inlet pipe 3 and the inlet pipe 4 through a valve group.

[0097] When high-pressure liquid is injected into the closed chamber, the folded bellows 207 is stretched under pressure, thereby pushing out the source rock inside the gold tube 103 to achieve sample cleaning. After sucking out the liquid, the folded bellows 207 will retract into the head tube 206 again. At the same time, high-pressure liquid is injected into the nozzle 208 to clean the inner wall of the gold tube 103. In order to improve the integration rate, the above-mentioned liquid is preferably a cleaning liquid that can match the oil and gas cleaning function.

[0098] In this embodiment, Figure 15-19 As shown, the injection assembly 3 includes a feeding part, and a retention and injection part arranged under the feeding part and connected with the filtering and outlet part. The feeding part includes a plurality of top plates 304 arranged horizontally and continuously, and parallel power-carrying grooves 305 are provided on both sides of the bottom of the top plates 304.

[0099] The feeding part includes a bottom plate 301 arranged parallel to the bottom of the top plate 304, grooves 302 opened in parallel on both sides of the top of the bottom plate 301, a material bin 303 installed at one end of the top of the bottom plate 301, and an electric cylinder 306 installed at one end of the bottom plate 301 for pushing the sample bin 4 in the material bin 303 into the gap between the bottom plate 301 and the top plate 304 in sequence.

[0100] Among them, a bracket is horizontally installed below one side of the silo 303, and the top plate 304 is hoisted at the bottom of the bracket in turn. The top plate 304 close to one end of the silo 303 is set as the first conductive plate, and its length is greater than the remaining top plates 304.

[0101] In this embodiment, different top plates 304 will be supplied with different specified voltages so that the oil and gas samples under each top plate 304 can always be heated and insulated to match the formation temperature. Without affecting the efficiency of the simulation experiment, the constant temperature heating time of the samples can be extended, thereby ensuring the authenticity of the simulated samples.

[0102] The interception and injection part includes a clamping jaw 307 arranged below the bottom plate 301 and directly below the first conductive plate, a seat plate 308 installed on the top of the claws on both sides of the clamping jaw 307, a conduit 309 installed on one side of the seat plate 308, an injection tube 310 installed on one end of the conduit 309, a side hole opened at the port of the injection tube 310, and a baffle 311 slidably fitted on the other side of the seat plate 308.

[0103] Among them, the other end of the one side conduit 309 is connected to the insulation pipe 312, one end of the insulation pipe 312 is connected to the outlet channel, and the insulation pipe 312 is also connected to a pressure gauge and a vacuum pump 1 313. The other end of the other side conduit 309 is connected to the vacuum pump 2 314, and a flow meter is connected in series between the vacuum pump 2 314 and the other side conduit 309, and the outlet of the vacuum pump 2 314 is connected to a gas tank 315.

[0104] Among them, the height of the seat plate 308 is between the bottom plate 301 and the top plate 304, the end of the blocking rod 311 close to the bottom plate 301 is a square rod end, and the other end is a round handle end. The outer sleeve of the round handle end is provided with a spring three. When the square rod end shrinks toward the inside of the seat plate 308, the spring three will be compressed, so that the square rod end has a tendency to move outward and reset.

[0105] The sample chamber 4 includes a chamber body 401 and a sapphire wafer 409 that seals the chamber body 401. The chamber body 401 has nozzles at both ends and heating wires 405 inside both sides. Both ends of the heating wires 405 are electrically connected to wire posts 406, which are vertically installed at the four corners of the chamber body 401.

[0106] The wire column 406 contacts the conductive grooves 305 at different positions to meet the power supply requirements of the heating wire 405. When the sample chamber 4 is being transported and fed, the interception and injection part intercepts the sample chamber 4 and pushes open the nozzle, thereby achieving sample oil and gas injection.

[0107] In this embodiment, Figure 20-25 As shown, the sample chamber 4 also includes pressure plates 408 respectively installed on the top and bottom of the chamber body 401 for fixing the sapphire wafer 409, side plates 407 respectively installed in the middle of both sides of the chamber body 401, and sliders 410 installed on both sides of the bottom of the bottom pressure plate 408, and the sliders 410 are adapted to the spacing width of the groove 302.

[0108] In this embodiment, the overall width of the bin body 401 plus the side panels 407 on both sides is consistent with the width of all top panels 304 except the first conductive plate.

[0109] The nozzle includes an inlet and outlet pipe 402 installed in the middle of the two ends of the warehouse body 401, a through hole 4 opened inside the inlet and outlet pipe 402 and connected to the interior of the warehouse body 401, a spring 2 403 arranged inside the through hole 4, and a small ball 404 arranged at the outer end of the spring 2 403.

[0110] Among them, the through hole four has a first section at the inner end, a second section at the outer end, and a third section in the middle for accommodating the spring 2 403 and the ball 404. The inner diameters of the first and second sections are consistent with the outer diameter of the injection tube 310. There is a smooth transition between the second and third sections, and the inner diameter of the third section is larger than the inner diameter of the second section.

[0111] Furthermore, this embodiment also provides a method for using a simulation device for online determination of oil and gas generation, comprising the following steps:

[0112] Step 1. The bases 105 on both sides move away from each other and drive the heating furnace barrel 102 to rotate through the linkage part, and the source rock plug samples and reservoir samples are filled into the gold tube 103 in turn, and then the structure is reset. The sample bin 4 at the bottom layer in the bin 303 is pushed under the first conductive plate by the electric cylinder 306, and at the same time, the clamp 307 performs a partial process of contraction, so that the blocking rod 311 extends into the gap between the first conductive plate and the bottom plate 301, thereby blocking the sample bin 4 being pushed down, and then the clamp 307 contracts again, so that the injection tube 310 is inserted into the nozzle to achieve communication, and then the power-on guide groove 305 of the first conductive plate is energized, so that the heating wire 405 works at the set voltage to achieve the required simulated formation temperature.

[0113] Step 2: The hydraulic system injects high-pressure cleaning liquid into the two elastic ring bags 108 in turn to make them expand and squeeze the two ends of the gold tube 103 close to the heating furnace barrel 102 to achieve sealing, and then injects high-pressure cleaning liquid into the closed annular gap to make it expand, thereby simulating the confining pressure generated around the sample, close the valve between the outlet channel and the insulation tube 312, and evacuate the sample chamber 4 through the vacuum pump 313, and then start heating the heating furnace barrel 102 to simulate the formation temperature during hydrocarbon generation and expulsion.

[0114] Step three, push the extrusion plug 110 into the gold tube 103, and apply force to squeeze the sample to simulate the pressure during hydrocarbon generation and discharge, open the valve between the outlet channel and the insulation tube 312, so that the generated oil and gas are filled into the sample chamber 4, and after the flow meter reading stabilizes, close the valve between the outlet channel and the insulation tube 312 again, and at the same time, the clamp 307 is reset to release the sample chamber 4 so that the injection tube 310 is separated from the nozzle to seal the oil and gas inside the sample chamber 4.

[0115] Step 4, the sample bin 4 currently at the bottom layer in the bin 303 continues to be pushed under the first conductive plate by the electric cylinder 4 306 until the previous sample bin 4 storing oil and gas is pushed under the adjacent top plate 304 by the sample bin 4. At this time, the first conductive plate changes the input voltage to simulate the next set formation temperature. At the same time, the heating furnace 102 changes the heating power, which is also used to simulate the next set formation temperature that matches it. The adjacent top plate 304 is fed with the set formation temperature required in the previous sample bin 4, and the sample bin 4 continues to be heated at a constant temperature to keep the oil and gas samples stable.

[0116] Step 5. Repeat the above steps, and the sample chamber 4 in the injection assembly 3 will be injected with the oil and gas component samples of each set temperature point of the simulation in turn, and when being transported by the feeding part, different top plates 304 will be connected to different specified voltages, so that the sample chamber 4 under each top plate 304 can always be heated and insulated to match the formation temperature of the sample inside it. The simulation experiment is carried out using multiple sample chambers 4 to avoid the risk of cross-contamination of samples. At the same time, without affecting the efficiency of the simulation experiment, the constant temperature heating time of the samples can be extended, thereby ensuring the authenticity of the simulated samples.

[0117] Step 6: When the sample bins 4 are pushed out of the bottom plate 301 in sequence, the spectral characteristics and parameters of the oil and gas in each sample bin 4 are observed online in sequence, and finally the spectral characteristics of the oil and gas components in each evolution stage can be determined. Further, after all the measurements are completed, refer to Fig.19The conduit 309 connected to the insulation tube 312 and the injection tube 310 are connected and controlled by a three-way control valve. The remaining valve port of the three-way control valve is connected to a section of pipe. According to the operation when injecting the sample, the sample chamber 4 is transported in sequence. However, when the sample chamber 4 is injected by itself, the three-way control valve will control the section of the pipe to be connected with the inside of the sample chamber 4. At this time, the exhaust gas inside the sample chamber 4 can be extracted by the vacuum pump 2 314 and injected into the gas tank 315, thereby realizing the recovery of the sample.

[0118] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A simulation device for online determination of oil and gas generation, comprising a simulation component (1), an auxiliary component (2), an injection component (3) and a sample chamber (4), characterized in that: The simulation component (1) comprises a slot plate (101), a pressure seat arranged on both sides of the slot plate (101), an extrusion portion and a filtering and outlet portion arranged on the two pressure seats, a heating furnace drum (102) rotating in the middle of the slot plate (101), and a gold tube (103) arranged in the heating furnace drum (102) and forming a closed annular gap, and an elastic ring bag (108) is arranged on the inner side of the pressure seat to seal the port of the gold tube (103); The auxiliary component (2) includes a linkage part connecting the heating furnace drum (102) and the base (105), a cleaning part for cleaning the gold tube (103), and a hydraulic system capable of independently injecting a liquid medium into the closed annular gap, the elastic annular bag (108), and the interior of the cleaning part, wherein the medium is a cleaning liquid; The injection assembly (3) comprises a feed portion, and a retention and injection portion arranged below the feed portion and connected to the filtering and outlet portion, the feed portion comprising a plurality of top plates (304) arranged in a horizontal and continuous manner, and parallel current conducting grooves (305) are provided on both sides of the bottom of the top plates (304); The sample chamber (4) comprises a chamber body (401) and a sapphire wafer (409) sealing the chamber body (401). The chamber body (401) has nozzles at both ends and heating wires (405) inside the two sides. Both ends of the heating wire (405) are electrically connected to wire posts (406) which are vertically mounted at the four corners of the chamber body (401). The wire column (406) contacts the conductive grooves (305) at different positions to meet the power supply requirements of the electric heating wire (405). When the sample chamber (4) is being transported and fed, the interception and injection part intercepts the sample chamber (4) and pushes open the nozzle, thereby achieving sample oil and gas injection. The press seat comprises a base (105) whose bottom is slidably connected to the two sides of the groove plate (101), an electric cylinder (106) whose two ends are connected to the sides of the base (105) at both sides, and a pipe seat (107) installed on the upper inner side of the base (105); The tube seat (107) has a cylindrical section with a large diameter on the outside and a cylindrical section with a small diameter on the inside, the inner ring of the elastic ring bag (108) is correspondingly sleeved on the cylindrical section with a small diameter, a through hole 1 is opened at the center of the tube seat (107), and a through hole 2 is opened inside the base (105) corresponding to the first through hole, and the through hole 1, the through hole 2 and the inner cavity of the gold tube (103) are on the same straight line; The gold tube (103) is in the shape of a barbell, the inside of its two ends respectively cooperate with the elastic ring bag (108), and the outside of its two ends respectively adhere to the inner walls of the two ends of the heating furnace barrel (102) and are sealed by the sealing ring (104) to form the closed annular gap between the heating furnace barrel (102); The closed annular gap is connected to an inlet pipe 1 at the top of the heating furnace drum (102) and is connected to an exhaust pipe 1 at the bottom of the heating furnace drum (102); the two elastic annular bags (108) are respectively connected to an inlet pipe 2 at the top of the tube seat (107) and are connected to an exhaust pipe 2 at the bottom of the tube seat (107).

2. The online simulation device for measuring oil and gas generation according to claim 1, characterized in that: The extrusion part comprises an electric cylinder 2 (109) and an extrusion plug (110) connected to the end of the telescopic rod of the electric cylinder 2 (109), and the electric cylinder 2 (109) is installed outside the base (105) on one side; The telescopic rod can push the extrusion plug (110) into the inner cavity of the gold tube (103) through the first through hole and the second through hole on the side, and the extrusion plug (110) is adapted to the inner cavity of the middle section of the gold tube (103).

3. The simulation device for online determination of oil and gas generation according to claim 2, characterized in that: The filtering and outlet portion comprises a sealing plug tube (111) disposed inside the base (105) on the other side, and a filtering quartz wool (112) sleeved on the inner end of the sealing plug tube (111); The sealing plug tube (111) is correspondingly installed at the inner end of the tube seat (107) on the other side, the sealing plug tube (111) is adapted to the inner cavity of the middle section of the gold tube (103), and a through hole three connected to the through hole one and the through hole two on the other side is opened at the center of the sealing plug tube (111), and the through hole one, the through hole two and the through hole three on the other side constitute an outlet channel.

4. The simulation device for online determination of oil and gas generation according to claim 3, characterized in that: The linkage part comprises a cam (201) installed at the bottom of the rotating shaft of the heating furnace drum (102), a push-pull rod (202) hinged to the protruding parts on both sides of the cam (201), a piston (203) hinged to the outer end of the push-pull rod (202), a spring (204) provided at the outer end of the piston (203), and a sleeve (205) slidably fitted on the outside of the piston (203), one end of the sleeve (205) being respectively connected to the inner side of the bottom of the base (105); A notch is provided on the side of the sleeve (205) for the push-pull rod (202) to move, and the external force applied to the spring 1 (204) during initial compression is greater than the resistance of the heating furnace drum (102) during rotation of the rotating shaft.

5. The simulation device for online determination of oil and gas generation according to claim 4, characterized in that: The cleaning section comprises a side arm (209) mounted on the side of the base (105) on the other side, a slide groove (210) mounted on the outer end of the side arm (209), a slide bar (211) fitted inside the slide groove (210), a machine head tube (206) mounted on the outside of the slide bar (211), and a folding bellows (207) arranged inside the machine head tube (206), and also comprises an electric cylinder three (212) mounted inside the side arm (209), wherein the telescopic end of the electric cylinder three (212) is connected to one end of the slide bar (211); The machine head tube (206) and the folded bellows (207) both have a closed end and an open end, the open end of the folded bellows (207) is connected to the inside of the machine head tube (206) to form a closed chamber, and the outer diameter of the open end of the machine head tube (206) is consistent with the inner diameter of the middle section of the gold tube (103); The closed chamber is connected to a third inlet pipe at the top of the machine head pipe (206) and a third outlet pipe at the bottom of the machine head pipe (206); The cleaning section further comprises a nozzle (208) disposed in the wall of the opening end of the machine head tube (206); The nozzle (208) is connected to an inlet pipe 4 at the top of the machine head pipe (206); The hydraulic system comprises a liquid tank (213) and a high-pressure pump (214); the inlet of the high-pressure pump (214) is respectively connected to the outlet of the liquid tank (213) and the third discharge pipe through a three-way valve; the outlet of the high-pressure pump (214) is respectively connected to the first inlet pipe, the two second inlet pipes, the third inlet pipe and the fourth inlet pipe through a valve group.

6. The simulation device for online determination of oil and gas generation according to claim 5, characterized in that: The material feeding section comprises a bottom plate (301) arranged parallel to the bottom of the top plate (304), grooves (302) arranged parallel to the top of the bottom plate (301) on both sides, a material bin (303) installed at one end of the top of the bottom plate (301), and an electric cylinder (306) installed at one end of the bottom plate (301) and used to push the sample bin (4) in the material bin (303) into the gap between the bottom plate (301) and the top plate (304) in sequence; A bracket is horizontally installed below one side of the silo (303), and the top plate (304) is hoisted at the bottom of the bracket in turn. The top plate (304) close to one end of the silo (303) is set as a first conductive plate, and its length is greater than the remaining top plates (304).

7. The simulation device for online determination of oil and gas generation according to claim 6, characterized in that: The interception and injection portion comprises a clamping claw (307) disposed below the bottom plate (301) and directly below the first conductive plate, a seat plate (308) mounted on the top of the claw teeth on both sides of the clamping claw (307), a guide tube (309) mounted on one side of the inside of the seat plate (308), an injection tube (310) mounted on one end of the guide tube (309), a side hole opened at the port of the injection tube (310), and a blocking rod (311) slidably fitted on the other side of the inside of the seat plate (308); The other end of the conduit (309) on one side is connected to a heat preservation pipe (312), one end of the heat preservation pipe (312) is connected to the outlet channel, the heat preservation pipe (312) is also connected to a pressure gauge and a vacuum pump 1 (313), the other end of the conduit (309) on the other side is connected to a vacuum pump 2 (314), a flow meter is connected in series between the vacuum pump 2 (314) and the conduit (309) on the other side, and the outlet of the vacuum pump 2 (314) is connected to a gas tank (315); The height of the seat plate (308) is between the bottom plate (301) and the top plate (304); one end of the blocking rod (311) close to the bottom plate (301) is a square rod end, and the other end is a round handle end; a spring three is sleeved on the outside of the round handle end; when the square rod end contracts toward the inside of the seat plate (308), the spring three is compressed, so that the square rod end has a tendency to move outward and return to its original position.

8. The simulation device for online determination of oil and gas generation according to claim 7, characterized in that: The sample chamber (4) further comprises pressure plates (408) respectively mounted on the top and bottom of the chamber body (401) for fixing the sapphire wafer (409), side plates (407) respectively mounted on the middle of both sides of the chamber body (401), and sliders (410) mounted on both sides of the bottom of the pressure plates (408), wherein the sliders (410) are spaced apart from the grooves (302) in a width adapted thereto; The nozzle comprises an inlet and outlet pipe (402) installed in the middle of both ends of the bin body (401), a through hole four opened inside the inlet and outlet pipe (402) and communicating with the inside of the bin body (401), a spring two (403) arranged inside the through hole four, and a small ball (404) arranged at the outer end of the spring two (403); Among them, the through hole four has a first section at the inner end, a second section at the outer end, and a third section in the middle for accommodating the second spring (403) and the small ball (404). The inner diameters of the first and second sections are consistent with the outer diameter of the injection tube (310). There is a smooth transition between the second and third sections, and the inner diameter of the third section is larger than the inner diameter of the second section.

9. The method for using the online simulation device for measuring oil and gas generation according to claim 8, characterized in that: The following steps are involved: Step 1: The bases (105) on both sides move away from each other and drive the heating furnace barrel (102) to rotate through the linkage part, and the source rock plug sample and the reservoir sample are filled into the gold tube (103) in turn, and then the structure is reset, and the sample bin (4) at the bottom layer in the bin (303) is pushed under the first conductive plate by the electric cylinder four (306), and at the same time, the clamping claw (307) performs a partial process of contraction, so that the blocking rod (311) extends into the gap between the first conductive plate and the bottom plate (301), thereby blocking the pushed sample bin (4), and then the clamping claw (307) contracts again, so that the injection tube (310) is inserted into the nozzle to achieve communication, and then the power-on guide groove (305) of the first conductive plate is energized, so that the heating wire (405) works according to the set voltage to achieve the desired simulated formation temperature; Step 2: The hydraulic system injects high-pressure cleaning liquid into the two elastic annular bags (108) in turn to make them expand and squeeze the two ends of the gold tube (103) close to the heating furnace barrel (102) to achieve sealing, and then injects high-pressure cleaning liquid into the closed annular gap to make it expand, so as to achieve the confining pressure simulated around the sample, close the valve between the outlet channel and the insulation pipe (312), and evacuate the sample chamber (4) through the vacuum pump 1 (313), and then start heating the heating furnace barrel (102) to simulate the formation temperature during hydrocarbon generation and expulsion; Step 3: Push the extrusion plug (110) into the gold tube (103) and apply force to squeeze the sample to simulate the pressure during hydrocarbon generation and discharge. Open the valve between the outlet channel and the insulation tube (312) to allow the generated oil and gas to be filled into the sample chamber (4). After the flow meter reading stabilizes, close the valve between the outlet channel and the insulation tube (312) again. At the same time, the clamp (307) is reset to release the sample chamber (4) so ​​that the injection tube (310) is separated from the nozzle, so that the oil and gas are sealed in the sample chamber (4). Step 4: The sample bin (4) currently at the bottom layer in the bin (303) continues to be pushed under the first conductive plate by the electric cylinder 4 (306) until the previous sample bin (4) storing oil and gas is pushed under the adjacent top plate (304) by the sample bin (4). At this time, the first conductive plate changes the voltage applied to simulate the next set formation temperature, and at the same time, the heating furnace barrel (102) changes the heating power, which is also used to simulate the next set formation temperature that matches it, while the adjacent top plate (304) is applied with the set formation temperature required in the previous sample bin (4), and the sample bin (4) continues to be heated at a constant temperature to keep the oil and gas sample stable. Step 5, repeat the above steps, and the sample chamber (4) in the injection assembly (3) will be injected with the simulated oil and gas component samples at each set temperature point in turn, and when being transported by the feeding part, different top plates (304) will be connected with different specified voltages, so that the sample chamber (4) under each top plate (304) can be heated and insulated to always match the formation temperature of the sample inside it. The simulation experiment is carried out using multiple sample chambers (4), thereby avoiding the risk of cross-contamination of samples. At the same time, without affecting the efficiency of the simulation experiment, the constant temperature heating time of the samples can be extended, thereby ensuring the authenticity of the simulated samples; Step 6: When the sample chambers (4) are pushed out of the bottom plate (301) in sequence, the spectral characteristics and parameters of the oil and gas in each sample chamber (4) are observed online in sequence, and finally the spectral characteristics of the oil and gas components at each evolution stage can be determined.

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