CN109142137B - Ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body and application thereof - Google Patents
Ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body and application thereof Download PDFInfo
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- CN109142137B CN109142137B CN201811187542.9A CN201811187542A CN109142137B CN 109142137 B CN109142137 B CN 109142137B CN 201811187542 A CN201811187542 A CN 201811187542A CN 109142137 B CN109142137 B CN 109142137B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Abstract
The invention discloses an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body and application thereof. The ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body comprises a middle sample chamber, a top sealing part and a bottom sealing part; the middle sample chamber comprises a cylinder body and a sample chamber arranged in the cylinder body, and the sample chamber is in contact fit with the cylinder body; the top sealing part and the bottom sealing part are respectively arranged at two ends of the sample chamber, and wedge-shaped self-tightening sealing is respectively arranged between the top sealing part and the bottom sealing part and the sample chamber; the top and bottom sealing parts can apply confining pressure to the sample in the sample chamber; the top sealing component can apply the static rock pressure to the sample in the sample chamber; a water storage block is arranged between the bottom sealing part and the sample chamber; the bottom and top sealing parts are internally provided with through holes communicated with the sample chamber. The ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body can realize fluid pressure, static rock pressure, confining pressure conditions, temperature and formation pore hydrocarbon generation space matched with geological actual conditions, so that the accuracy and precision of evaluation parameters of hydrocarbon generation and discharge of deep hydrocarbon source rocks are improved.
Description
Technical Field
The invention relates to an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle and application thereof, belonging to the technical field of oil and gas geochemistry.
Background
The hydrocarbon generation and drainage simulation experiment is one of important means for researching the evolution mechanism of the hydrocarbon source rock, the evaluation of oil and gas resources and the comparison of the oil and gas sources. Research on shallow hydrocarbon reservoirs shows that hydrocarbon generation and hydrocarbon discharge of hydrocarbon source rocks are a very complex geochemical process, namely, organic matter macromolecules are gradually split into small molecules along with the rise of temperature, and finally petroleum and natural gas are formed. It can be seen that temperature and time are important factors for organic matter maturation and hydrocarbon formation; with the progress of research, the effects of the static rock pressure and the fluid pressure on the organic matter maturation and the hydrocarbon generation are not negligible, and the coupling of the static rock pressure and the fluid pressure with the temperature and the time is an important control factor for the organic matter maturation and the hydrocarbon generation.
Formation of deep hydrocarbon reservoirs also requires a source rock with a certain content of organic matter as the material basis for hydrocarbon formation. Deep parts of the basin, generally, the depth is more than 6000m, the surrounding pressure and the static rock pressure are minimum to exceed 150MPa, and under the condition of high temperature (geological temperature is more than 150 ℃) and high pressure (more than 150MPa) at deep parts, the parent substances of the generated hydrocarbons are greatly changed, and besides the source rocks, the generated hydrocarbons also comprise liquid hydrocarbons (petroleum). Hydrocarbon source rocks capable of producing oil and gas are widely distributed in the deep layer of 4000-9000 m of most of oil-gas-containing basins. The deep source rock may be clastic rock (mudstone, shale), carbonate rock (dolomite, marl, limestone) or a transition type rock between the two lithologies (argillaceous-carbonate rock). Research shows that even under the condition of modern earth temperature of 220-296 ℃, liquid hydrocarbon (petroleum) still exists in the ultra-deep well, exists in a deep stratum in the form of dispersed organic matters, and is further cracked to form natural gas under the influence of various geological factors. Liquid hydrocarbons (petroleum) are another biogenic parent substance that forms natural gas in addition to the source rock.
At present, the evaluation of the hydrocarbon generation and discharge process and mechanism of the basin deep hydrocarbon source rock is realized by adopting a simulation experiment technology mainly through an ultrahigh pressure and high temperature hydrocarbon generation and discharge kettle body, and is a key part of the whole simulation experiment instrument. The existing simulation experiment technology mainly emphasizes temperature and time, and neglects the influence of main geological factors such as formation fluid pressure, hydrocarbon generating space, high-temperature and high-pressure formation water, primary hydrocarbon discharge and the like. The hydrocarbon generation and discharge processes of the basin deep hydrocarbon source rock cannot be directly observed and directly measured by scientific researchers, so that the scientific researchers utilize a simulation experiment technology to simulate that organic matter macromolecules are gradually split into small molecules under the conditions of certain temperature, static rock pressure, confining pressure, fluid pressure, geological time and the like of the hydrocarbon source rock, finally petroleum and natural gas are formed, and the hydrocarbon generation and discharge processes and mechanisms of the basin deep hydrocarbon source rock are evaluated by measuring various parameter changes of the hydrocarbon source rock before and after the simulation experiment and collecting geochemical parameters of liquid hydrocarbon (petroleum) and gaseous hydrocarbon (various gases).
At present, due to the fact that the conditions of fluid pressure, static rock pressure and confining pressure borne by the hydrocarbon source rock are not matched with geological actual conditions, evaluation of the hydrocarbon source rock in the deep layer of the basin is unreasonable, and accuracy and precision of geochemical parameters are reduced.
The technical scheme of the conventional high-pressure autoclave is as follows: loading a hydrocarbon source rock sample crushed into 200 meshes into a sample chamber, and putting the sample chamber into a high-pressure kettle body, wherein the volume is generally 250 mL; the bottom of the autoclave is sealed, the top is opened, and the section is U-shaped. The sealing plug is pressed and sealed by the lower flange, the upper flange and the fixing bolt through the contact of the sealing plug and the red copper ring with the inner wall of the top of the high-pressure kettle. Putting the sealed autoclave into a heating furnace, setting a certain heating rate, heating from room temperature to the target temperature of the experiment (usually 250-550 ℃, the temperature step is 50 ℃), and keeping the temperature for a period of time (usually 72 hours); the hydrocarbon source rock sample and the generated oil and gas can further perform chemical reaction and interaction in a volume of about 230mL (the volume occupied by the hydrocarbon source rock sample below 20 g is less than 20 mL); after the experiment is completed, the gas is discharged from a product discharge port and enters a collecting part, and the gas is collected and quantified by a saturated brine discharging method. At present, the above similar autoclave is used to carry out hydrocarbon generation simulation experiment of the hydrocarbon source rock sample under certain conditions of temperature and hydrocarbon generation pressurization, and considering the existing fluid pressure, the existing fluid pressure is limited to the generated oil and gas, and in a space (about 230mL) far larger than the sample volume (about 20mL), certain pressure (usually less than 10MPa) is formed on the autoclave wall, namely the fluid pressure formed by the hydrocarbon generation pressurization; no consideration was given to applying lithostatic pressure; the fluid pressure is suitable for the hydrostatic pressure of the basin with the depth less than 1000m, the hydrostatic pressure and the hydrostatic pressure are not matched, and the degree of automation control is not high.
In the subsequent improvement of the high-pressure kettle, a pressure slide rod is added into a sealing plug to push a pressure piston, and the upper surface of a hydrocarbon source rock sample is applied with static rock pressure to reduce a hydrocarbon generation space; the hydrocarbon source rock sample and the generated oil and gas can further perform chemical reaction and interaction in a volume slightly larger than 20 mL; as the volume of the generated oil and gas, especially the gas, is gradually increased, the pressure piston pushes the pressure slide rod to move upwards, the hydrocarbon generation space is increased, and the fluid pressure is reduced. Or the side wall of the kettle body shell is provided with a first through hole capable of collecting raw and discharged hydrocarbon, such as an experimental device for collecting raw and discharged hydrocarbon, and the experimental device has the advantage of high efficiency of collecting raw and discharged hydrocarbon. During the experiment, the computer monitors the temperature, the fluid pressure, the pressure gauges and other relevant experiment conditions and parameter changes in the autoclave. After the experiment is finished, the gas is discharged from a product discharge port, enters a gas metering tube, is metered by a level bottle under normal pressure, and is collected by a saturated brine discharge method. Carrying out hydrocarbon generation simulation experiments on the hydrocarbon source rock sample by using the similar autoclave, under the conditions of certain temperature and hydrocarbon generation pressurization, considering the existing fluid pressure, only limiting the generated oil and gas, and forming certain pressure (generally less than 10MPa) on the autoclave wall in a space slightly larger than the volume of the sample (about 20mL), namely the fluid pressure formed by the hydrocarbon generation pressurization; considering the applied lithostatic pressure, as the volume of the generated oil and gas, especially the gas, is gradually increased, the pressure piston pushes the pressure slide rod to move upwards, and the achieved lithostatic pressure is changed. For example, an experimental apparatus for collecting raw and discharged hydrocarbons, in which a first through hole capable of collecting raw and discharged hydrocarbons is formed on a side wall of a kettle body housing, has a point where efficiency of collecting raw and discharged hydrocarbons is high. When geological conditions of deep-layer hydrocarbon source rocks are simulated, the conditions of ultrahigh pressure and high temperature are involved, leakage is easy to occur in the first through hole, and the tightness of the kettle body under the conditions of ultrahigh pressure and high temperature cannot be guaranteed. Therefore, the fluid pressure and the static rock pressure realized by the similar high-pressure autoclave are always suitable for the pressure condition that the basin depth is less than 1000m, the simulated static rock pressure and fluid pressure factors lack the constraint of a geological model, and the design values of the temperature, the static rock pressure and the fluid pressure are relatively random and are seriously disconnected with the actual values under the geological condition during the design of a simulation experiment. In the simulation of hydrocarbon source rocks, particularly deep-layer hydrocarbon source rocks in a basin, hydrocarbon generation and hydrocarbon discharge conditions are not matched seriously, and unreasonable factors exist in the evaluation parameters of hydrocarbon source rock hydrocarbon generation and hydrocarbon discharge.
Disclosure of Invention
The invention aims to provide an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to realize fluid pressure, static rock pressure, confining pressure conditions, temperature and formation pore hydrocarbon generation space matched with geological actual conditions, so that the accuracy and precision of deep hydrocarbon source rock hydrocarbon generation and discharge evaluation parameters are improved.
The ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body comprises a middle sample chamber, a top sealing part and a bottom sealing part;
the middle sample chamber comprises a cylinder body and a sample chamber arranged in the cylinder body, and the sample chamber is in contact fit with the cylinder body; the sample chamber is used for placing a sample;
the top sealing part and the bottom sealing part are respectively arranged at two ends of the sample chamber, and wedge-shaped self-tightening sealing is respectively arranged between the top sealing part and the bottom sealing part and the sample chamber;
applying confining pressure to the sample within the sample chamber is enabled by the top sealing member and the bottom sealing member;
the application of lithostatic pressure to the sample in the sample chamber can be achieved through the top sealing component;
a water storage block between the bottom sealing part and the sample chamber (which is used for increasing the water quantity by about 5 milliliters);
through holes communicated with the sample chamber are formed in the bottom sealing part and the top sealing part.
The cylinder in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is preferably cylindrical.
The pad is hard, preferably metallic.
In the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, the top sealing component comprises a static rock pressure rod and a plurality of pressure rings sleeved on the static rock pressure rod, and wedge-shaped self-tightening sealing is formed among the pressure rings;
the bottom of the static rock pressure rod is in contact fit with the sample chamber;
the static rock pressure rod is provided with the through hole along the radial direction.
In the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, the pressure ring comprises a conical middle pressure ring, a lower red copper pressure ring, a graphite pressure ring, an upper red copper pressure ring, an upper pressure ring and an upper pressure sleeve which are sequentially matched;
the clamping ring is arranged to have the following effects: when the heating is started, the red copper is not easy to deform, so the graphite pressure ring plays a role in sealing; when heating and making the red copper warp and play the sealing effect, the graphite clamping ring is in quiet rock depression bar with go up the red copper clamping ring and play the lubrication action down between the red copper clamping ring.
The plane end of the conical intermediate pressure ring is in contact fit with the sample chamber, and the convex conical end of the conical intermediate pressure ring is in wedge fit with the concave conical end of the lower red copper pressure ring to form top lower wedge self-tightening seal;
two ends of the graphite pressure ring are respectively in contact fit with the plane ends of the lower red copper pressure ring and the upper red copper pressure ring;
the concave conical end of the upper red copper pressure ring is in wedge-shaped fit with the convex conical end of the upper pressure ring to form top wedge-shaped self-tightening seal;
applying confining pressure to the sample by the upper pressure applying sleeve, specifically applying pressure to the upper pressure applying sleeve, wherein the pressure sequentially passes through the upper pressure ring, the upper red copper pressure ring, the graphite pressure ring, the lower red copper pressure ring and the conical middle pressure ring to act on the sample chamber;
the top of the static rock pressure rod is in contact fit with the upper pressure ring middle sleeve, static rock pressure is applied to the sample through the upper pressure ring middle sleeve, and pressure is applied to the upper pressure ring middle sleeve through the static rock pressure rod and then is transmitted to the sample.
In the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, the bottom sealing component comprises a self-tightening lower end cover, a red copper sealing ring, a lower pressure ring and a lower pressure sleeve which are matched in sequence;
the plane end of the self-tightening lower end cover is in contact fit with the water storage block, and the wedge-shaped end of the self-tightening lower end cover is in wedge fit with the red copper sealing ring;
and applying confining pressure to the bottom of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body through the lower pressure sleeve.
Specifically, the self-tightening lower end cover is provided with an inner wedge-shaped end surface;
the red copper sealing ring is provided with an outer wedge-shaped end face, the two wedge-shaped end faces are completely matched, and under the upward pressure of the pressing sleeve, bottom wedge-shaped self-tightening sealing is formed to simulate confining pressure.
A bottom end cover pressing cap can be sleeved outside the lower pressing sleeve, and the lower pressing sleeve can be contacted with a bottom ejector rod of a lower oil cylinder of the hydraulic station during a simulation experiment; the middle of the self-tightening lower end cover is provided with a hole (namely the through hole) which is connected with the ultrahigh pressure intermediate container and the ultrahigh pressure electric pump through a lower right-angle elbow and a lower pipeline; the middle of the static rock pressure rod is provided with a hole (namely the through hole) which is connected with the inlet end of the high-pressure three-way valve and a product collecting and detecting part through an upper right-angle bent pipe and an upper pipeline.
In the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, an upper metal filter sheet is arranged between the conical medium pressure ring and the sample chamber, and plays a role in filtering a powder sample during high-pressure hydrocarbon discharge;
and a lower metal filter plate and a cushion block are sequentially arranged between the sample chamber and the water storage block and are matched with each other to prevent the powder sample from being carried out during high-pressure hydrocarbon discharge.
The ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body provided by the invention can simulate hydrocarbon generation and discharge processes of basin deep hydrocarbon source rocks, and is a place for placing samples to perform simulation experiments and gathering various products under ultrahigh-pressure high-temperature conditions.
Original pores of a hydrocarbon source rock sample can be reserved, the hydrocarbon source rock core sample or a fine particle sample is pressed into a cylindrical core sample, the cylindrical core sample is placed into a high-pressure and high-temperature resistant sample chamber and is placed into an ultrahigh-pressure and high-temperature hydrocarbon generation and discharge kettle body together, sealing pressure and confining pressure of the bottom and the top are applied through a hydraulic station, and a cylindrical static rock pressure rod in contact with the upper surface of the sample is applied with pressure, so that static rock pressure is formed; providing fluid pressure for the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body by using an ultrahigh-pressure electric pump and an ultrahigh-pressure intermediate container; a hollow cylindrical alloy cylinder body with openings at two ends is sealed by adopting wedge-shaped self-tightening to form confining pressure; the lower end of the kettle body is connected with a lower right-angle elbow and a pipeline respectively with an ultrahigh pressure intermediate container and an ultrahigh pressure electric pump; the upper end of the kettle body is connected with a pipeline, an inlet end of a high-pressure three-way valve and a product collecting and detecting part by an upper right-angle bent pipe; the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is placed in a heating furnace and heated, so that hydrocarbon generation and discharge of a hydrocarbon source rock sample are fully performed under the conditions of static rock pressure, fluid pressure, confining pressure, temperature and formation pore space similar to geological conditions, and hydrocarbon generation and discharge processes of the basin deep layer hydrocarbon source rock are simulated.
Specifically, the ultrahigh pressure and high temperature hydrocarbon generation and discharge kettle body can be used according to the following steps:
loading a sample into the sample chamber of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; then, two ends of the middle sample chamber are respectively matched with the top sealing part and the bottom sealing part in a sealing way and are placed in a box type heating furnace;
applying confining pressure and static rock pressure to the sample by using a hydraulic device;
flowing an experimental fluid (in an ultra-high pressure intermediate vessel) through the bottom sealing member, the sample chamber, and the top sealing member using a pump (e.g., an ultra-high pressure electric pump) to create a fluid pressure;
and heating the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body.
When the sample is loaded, a fine particle sample can be loaded into the sample chamber, and the sample is pressed by the auxiliary press to form a cylindrical core sample, or the cylindrical core sample which is cut and ground is directly loaded.
The confining pressure is applied by the following process:
controlling the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to move upwards by using the hydraulic device, so that the top sealing part or the upper pressing sleeve is in contact with the top of the box-type heating furnace to form confining pressure on the sample;
specifically, the method can be carried out according to the following steps: starting a pressurizing button of a lower oil cylinder of the hydraulic station, feeding oil into the lower oil cylinder, pushing a lower piston rod, a bottom ejector rod and the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to move upwards by oil pressure, and stopping the movement by touching a hollow ejector column fixed on the box-type heating furnace by the upper pressurizing sleeve; the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body moves upwards, the convex conical end of the upper pressure ring is pressed into the concave conical end of the upper red copper pressure ring by the upper pressure sleeve, and the top wedge-shaped self-tight seal is formed; meanwhile, the inner side of the red copper sealing ring is wedged into the outer side of the self-tightening lower end cover to complete bottom wedge-shaped self-tightening sealing, and confining pressure is formed.
The process of applying the lithostatic pressure is as follows:
the hydraulic device is used for controlling the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to move downwards, so that the static rock pressure rod is tightly pressed by the middle sleeve of the upper pressure ring, and the static rock pressure on the sample is formed;
specifically, the method can be carried out according to the following steps: and starting a pressurizing button of an oil cylinder in the hydraulic station, feeding oil into the oil cylinder, pushing an upper piston rod and a top pressure rod to move downwards by oil pressure, penetrating the upper piston rod and the top pressure rod through a hollow top column fixed at the top of the box-type heating furnace, and pressing the upper compression ring middle sleeve on the upper part of the static rock pressure rod to realize the static rock pressure on the hydrocarbon source rock sample.
The process of applying the fluid pressure is as follows:
the experimental fluid is communicated from the through hole in the top sealing part to a high-pressure three-way valve, and the high-pressure three-way valve is connected with a pressure sensor;
specifically, the method can be carried out according to the following steps: starting the superhigh pressure electric pump, promoting the experimental fluid in the superhigh pressure intermediate container (generally be deionized water or other liquid, like oil field water, crude oil etc.), in proper order get into with the superhigh pressure high temperature is given birth to lower pipeline, lower right angle return bend that the hydrocarbon cauldron body links to each other set up in the formula of fastening down the through-hole that sets up get into the water storage piece, pass down metal filter piece middle hole in the cushion block, sample go up metal filter piece through-hole, last right angle return bend and the last pipeline that sets up in the quiet rock pressure pole, until high-pressure three-way valve entrance point with pressure sensor forms fluid pressure.
The sample is heated and the temperature is measured by using a temperature control thermocouple and a temperature measuring thermocouple, and particularly, the temperature control thermocouple and the temperature measuring thermocouple can be arranged on the outer wall of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body.
The unloading can be carried out according to the following steps:
and opening a hydrocarbon discharging valve connected with the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body when the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is cooled to 150-160 ℃, so that gaseous products in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body enter a gas-liquid separator.
After unloading the sample, the bottom sealing part, the middle sample chamber and the top sealing part can be sequentially disassembled. And subsequently, cleaning the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body. And under replacement, the red copper pressure ring, the graphite pressure ring, the upper red copper pressure ring and the red copper sealing ring are used for next sample loading work.
Before the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is used for carrying out simulation experiments, the design values of the temperature, the fluid pressure, the static rock pressure and the confining pressure of a hydrocarbon source rock sample come from the accurate calculation of a geological model of a reservoir containing the oil gas to be researched. In the simulation experiment process, hydrocarbon generation and discharge conditions of deep hydrocarbon source rocks in the basin sedimentation process and the basin lifting process are realized.
The settling process of the deep hydrocarbon source rock, namely the heating and pressurizing process. Hot air with the temperature close to that of the hot air and circulating up and down is formed by utilizing a box-type heating furnace, a heating pipe, a thermocouple and a fan with a motor, and the hot air heats the hydrocarbon source rock and fluid in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body and a sample chamber in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; the inner side of the red copper sealing ring is wedged into the outer side of the self-tightening lower end cover by using the mechanical pressure of a hydraulic device to complete bottom wedge self-tightening sealing, and bottom sealing pressure is applied to the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to simulate the confining pressure of deep hydrocarbon source rocks; meanwhile, the upper pressing sleeve presses the convex conical end of the upper pressing ring into the concave conical end of the upper red copper pressing ring, so that the formed self-sealing of the wedge shape on the top is mainly realized; the hydraulic device is used for generating continuously variable mechanical pressure to simulate the static rock pressure, and the volume of hydraulic oil in the oil cylinder is increased, so that the static rock pressure applied to the upper surface of the rock sample is increased; the fluid pressure borne by the hydrocarbon source rock sample in the sample chamber in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is increased by increasing the pressure of the high-pressure electric pump, so that hydrocarbon generation and discharge conditions of deep hydrocarbon source rock in the basin sedimentation process are completely simulated.
And (3) a lifting process of the deep hydrocarbon source rock, namely a cooling and depressurizing process. Heating pipes in the box type heating furnace stop heating, blowing hot air out of the heating furnace by a fan with a motor, cooling hydrocarbon source rock and fluid in the sample chamber of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body until the temperature is reduced to a design value, and continuously preserving the heat until the experiment is finished;
the inner side of the red copper sealing ring is wedged into the outer side of the self-tightening lower end cover by using the mechanical pressure of a hydraulic device to complete bottom wedge self-tightening sealing, and bottom sealing pressure is applied to the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to simulate the confining pressure of deep hydrocarbon source rocks; meanwhile, one flat end of the conical middle pressure ring is contacted with the top of the sample chamber, and one convex-conical end of the conical middle pressure ring is pressed into one concave-conical end of the lower red copper pressure ring, so that the formed top lower wedge-shaped self-tight seal is mainly used; the method comprises the steps that a hydraulic device is used for generating continuously variable mechanical pressure to simulate static rock pressure, and the volume of hydraulic oil in an upper oil cylinder is reduced, so that the static rock pressure applied to the upper surface of a hydrocarbon source rock sample is reduced; the fluid pressure borne by the hydrocarbon source rock sample in the sample chamber in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is reduced by reducing the pressure of the high-pressure electric pump, and hydrocarbon generation and discharge conditions of deep hydrocarbon source rock in the lifting process of the basin are completely simulated.
Through the accurate control of software and hardware, various pressure and temperature parameter values are equivalent to design values and approximate to the actual geological temperature and pressure conditions, and the accuracy and precision of evaluation parameters of the deep hydrocarbon source rock are improved, so that the hydrocarbon generation and discharge processes and mechanisms of the deep hydrocarbon source rock are accurately evaluated.
Drawings
FIG. 1 is a cross-sectional view of the structure of an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle of the invention.
FIG. 2 is a three-dimensional structure diagram of a sample loading and unloading structure of an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
FIG. 1 is a cross-sectional view of the ultra-high pressure and high temperature hydrocarbon generation and discharge kettle structure of the present invention, and FIG. 2 is a three-dimensional structure diagram of a sample loading and unloading thereof. The invention relates to an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body which comprises a middle sample chamber, a top sealing part and a bottom sealing part. Specifically, the middle sample chamber comprises a cylindrical barrel 114 and a sample chamber 101 arranged in the cylindrical barrel 114, the sample chamber 101 is used for placing a hydrocarbon source rock sample, and the sample chamber 101 is in contact fit with the cylindrical barrel 114.
The top sealing part comprises a static rock pressure rod 105 and a plurality of pressure rings sleeved on the static rock pressure rod 105, and wedge-shaped self-tightening sealing is formed between the pressure rings; the bottom of the static rock pressure rod 105 is in contact fit with the sample chamber 101, and an upper metal filter 103 is arranged between the bottom of the static rock pressure rod and the sample chamber. The static rock pressure bar 105 is provided with a through hole along the radial direction thereof, and the through hole is connected with an upper right-angle elbow 121. The clamping ring that the cover was located on quiet rock depression bar 105 is including the toper median compression ring 106 that cooperates in proper order, red copper clamping ring 107 down, graphite clamping ring 108, go up red copper clamping ring 109, go up clamping ring 110 and last cover 112 of exerting pressure, wherein, the plane end of toper median compression ring 106 and last metal filter 103 contact cooperation, the protruding conical end of toper median compression ring 106 and the concave conical end wedge cooperation of red copper clamping ring 109 down form wedge from closely sealing under the top, the both ends of graphite clamping ring 108 respectively with the plane end contact cooperation of red copper clamping ring 107 down and last red copper clamping ring 109, the concave conical end of going up red copper clamping ring 109 and the protruding conical end wedge cooperation of last clamping ring 110, form wedge from closely sealing on the top. The top of the static rock pressure rod 105 is in contact fit with the upper pressure ring intermediate sleeve 111.
A cushion block 100 and a water storage block 113 are sequentially arranged between the bottom sealing part and the sample chamber 101. Bottom seal part is including the formula lower end cover 115 that sticiss in proper order, red copper sealing ring 116, hold-down ring 117 and hold-down sleeve 118 down, wherein, the plane end and the 113 contact cooperations of water storage piece of formula lower end cover 115 that sticiss, form wedge-shaped cooperation between the wedge end of formula lower end cover 115 and the red copper sealing ring 116 that sticiss, and formula lower end cover 115 that sticiss has interior wedge-shaped terminal surface, red copper sealing ring 116 has outer wedge-shaped terminal surface, two wedge-shaped terminal surfaces coincide completely, under the ascending pressure of the cover 118 that sticiss down, form bottom wedge-shaped autogenously tight seal, the simulation is confined and is pressed. A bottom end cap 119 is sleeved outside the lower pressing sleeve 118.
When the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is used for simulating the hydrocarbon generation process and the hydrocarbon discharge process of deep hydrocarbon source rocks, the steps can be carried out as follows:
the sample loading process comprises the following steps: loading a fine particle sample into a sample chamber 101 (the left or the left lower part is the top or the upper part, and the right or the right upper part is the bottom or the lower part in fig. 1 and 2), applying pressure to the sample by an auxiliary press to form a cylindrical core sample 102 or a cut and ground cylindrical core sample 102, and placing an upper metal filter plate 103, a lower metal filter plate 104 and a cushion block 100 at two ends of the sample; the static rock pressure rod 105 is sleeved with a conical middle pressure ring 106, a lower red copper pressure ring 107, a graphite pressure ring 108 and an upper red copper pressure ring 109 in sequence, the static rock pressure rod is arranged in the sample chamber 101 from the upper part of the sample chamber 101, the bottom of the static rock pressure rod 105 is contacted with the upper metal filter sheet 103, the flat end of the conical middle pressure ring 106 is contacted with the top of the sample chamber 101, the convex conical end of the conical middle pressure ring 106 is contacted with the concave conical end of the lower red copper pressure ring 107, and the graphite pressure ring 108 and the lower red copper pressure ring 107 are contacted with the flat end of the upper red copper pressure ring 109 to form top-lower-wedge self-sealing. An upper pressure ring 110, an upper pressure ring intermediate sleeve 111 and an upper pressure sleeve 112 are arranged at the top of the static rock pressure rod 105, and the convex conical end of the upper pressure ring 110 is contacted with the concave conical end of the upper red copper pressure ring 109 to form top wedge-shaped self-tight sealing.
A water storage block 113 is arranged at the bottom of the sample chamber 101; the sample chamber 101 and the water storage block 113 are arranged in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body from the top of the cylindrical barrel 114 of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; a self-tightening lower end cover 115 is placed at the bottom of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, a red copper sealing ring 116, a lower pressing ring 117 and a lower pressing sleeve 118 are sequentially placed, the interior of the red copper sealing ring 116 is wedge-shaped, the exterior of the self-tightening lower end cover 115 is wedge-shaped, two wedge-shaped surfaces are completely matched, and under the upward pressure of the lower pressing sleeve 118, bottom wedge-shaped self-tightening sealing is formed to simulate confining pressure; the self-tightening lower end cover 115, the red copper sealing ring 116, the lower pressing ring 117 and the lower pressing sleeve 118 penetrate through the bottom end cover pressing cap 119, and the lower pressing sleeve 118 is in contact with a bottom ejector rod of a lower oil cylinder of the hydraulic station; the middle of the self-tightening lower end cover 115 is provided with a hole and is connected with an ultrahigh pressure intermediate container and an ultrahigh pressure electric pump through a lower right-angle elbow 120 and a lower pipeline 121; the middle of the static rock pressure rod is provided with a hole and is connected with the inlet end of the high-pressure three-way valve and a product collecting and detecting part through an upper right-angle bent pipe and an upper pipeline. The whole ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is placed into a box type heating furnace.
Applying static rock pressure and sealing: starting a pressurizing button of a lower oil cylinder of the hydraulic station, feeding oil into the lower oil cylinder, pushing a lower piston rod, a bottom ejector rod and an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to move upwards by oil pressure, touching a hollow ejection column fixed on a box-type heating furnace by an upper pressurizing sleeve 112, and stopping moving; the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body moves upwards, the convex conical end of the upper pressure ring 110 is pressed into the concave conical end of the upper red copper pressure ring 109 by the upper pressure sleeve 112, and the top wedge-shaped self-tight seal is formed; meanwhile, the inner side of the red copper sealing ring 116 is wedged into the outer side of the self-tightening lower end cover 115 to complete bottom wedge-shaped self-tightening sealing; the lower piston rod and the bottom ejector rod penetrate through and are fixed at the bottom of the box-type heating furnace; and closing the hydraulic station until the confining pressure reaches the experimental design value. Starting a pressurizing button of an upper oil cylinder of the hydraulic station, feeding oil into the upper oil cylinder, pushing an upper piston rod and a top pressure rod to move downwards by oil pressure, penetrating the upper piston rod and the top pressure rod through a hollow top column fixed at the top of the box-type heating furnace, and tightly pressing an intermediate sleeve of the upper pressure ring on the upper part of the static rock pressure rod to realize the static rock pressure of the hydrocarbon source rock sample; and closing the hydraulic station until the static rock pressure reaches the experimental design value.
Applying fluid pressure and leakage test: starting an ultrahigh-pressure electric pump, pushing experimental fluid (generally deionized water or other liquid, such as oilfield water, crude oil and the like) in an ultrahigh-pressure intermediate container to sequentially enter a lower pipeline, a lower right-angle elbow and a middle hole of a self-tightening lower end cover 115 connected with an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, enter a water storage block 113, pass through a lower metal filter sheet 104, a middle hole of a cushion block 100, a sample, an upper metal filter sheet 103, a middle hole of a static rock pressure rod, an upper right-angle elbow 121 and an upper pipeline, and reach an inlet end of a high-pressure three-way valve and a pressure sensor to form fluid pressure; and (3) turning off the ultrahigh-pressure electric pump until the fluid pressure is slightly higher than the experimental design value, waiting for no fluid to flow out of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body and the pipeline connected with the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, and keeping the fluid pressure value displayed by the pressure sensor constant at a certain value for more than 10 minutes to finish the leakage test of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body. The sample loading process and the pressurization process of the ultrahigh pressure and high temperature hydrocarbon generation and discharge kettle body are successful.
Heating: respectively attaching a temperature control thermocouple and a temperature measuring thermocouple to temperature measuring concave points 122 and 123 (figure 1) of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, closing the front door of the fixed box type heating furnace, and starting a heating button to heat. Setting various parameter values on computer software in advance, and writing the parameter values into corresponding headers on a control panel of the simulator; the parameters include experiment temperature, time, confining pressure, static rock pressure, fluid pressure and the like.
The sample unloading process comprises the following steps: after the experiment is finished for the design time, the heating button and the power supply are closed, and the front door of the fixed box type heating furnace is opened to cool; naturally cooling to 150 ℃, opening a hydrocarbon discharging valve connected with the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, and allowing gaseous products of the kettle body to enter a gas-liquid separator which is vacuumized in advance to collect and quantify the products; connecting nuts are unscrewed at the lower pipeline and the lower right-angle elbow 120 connected with the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body and at the upper pipeline and the upper right-angle elbow 121, and the lower pipeline and the upper pipeline are removed.
When the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is disassembled, the method can be carried out according to the following steps:
(1) removing bottom seal parts
After the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is naturally cooled to room temperature for 10 hours, starting a lower oil cylinder pressure reduction button of a hydraulic station, discharging oil from the lower oil cylinder, moving a lower piston rod downwards, moving a bottom ejector rod and the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body downwards, closing the lower oil cylinder pressure reduction button when a lower right-angle bent pipe is close to the bottom of a box-type heating furnace, and stopping moving; the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is moved out of the box type heating furnace, the upper pressure ring middle sleeve 111, the upper pressure applying sleeve 112, the lower pressure sleeve 118 and the bottom end cover pressure cap 119 are removed, and connecting nuts are unscrewed at a lower right-angle elbow 120 and an upper right-angle elbow 121 which are connected with the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; moving the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to a cylindrical hollow base of an auxiliary press, and placing a nut protective sleeve on the top of the static rock pressure rod 105, wherein the diameter of the nut protective sleeve is slightly smaller than that of the static rock pressure rod 105; another sample unloading static rock pressure rod is placed on the upper surface, the diameter of the sample unloading static rock pressure rod is slightly smaller than that of the static rock pressure rod 105, an oil cylinder pressurizing button of the auxiliary press is started, oil is fed into the oil cylinder, the oil pressure of the auxiliary press pushes a piston rod to move downwards, after the sample unloading static rock pressure rod and the nut protective sleeve are touched, the oil pressure of the auxiliary press is increased, and the sample unloading static rock pressure rod and the nut protective sleeve are pressed into the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; meanwhile, the self-tightening lower end cover 115, the red copper sealing ring 116 and the lower pressing ring 117 are ejected out of the bottom of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; stopping pressurizing the auxiliary press; starting the pressure reducing button of the auxiliary press, moving the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, the nut protective sleeve and the sample unloading static rock pressure rod arranged on the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, and moving the self-tightening lower end cover 115, the red copper sealing ring 116 and the lower pressure ring 117 from the cylindrical hollow base.
(2) Unload middle part sample room
Moving the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to a cylindrical hollow base of an auxiliary press again, placing a nut protective sleeve at the top of the static rock pressure rod 105, and placing another longer sample unloading static rock pressure rod on the static rock pressure rod, wherein the diameter of the pressure rod is slightly smaller than that of the static rock pressure rod 105; starting an oil cylinder pressurizing button of the auxiliary press, feeding oil into the oil cylinder, pushing a piston rod to move downwards by the oil pressure of the auxiliary press, increasing the oil pressure of the auxiliary press after the sample unloading static rock pressure rod and the nut protective sleeve are touched, and pressing the sample unloading static rock pressure rod and the nut protective sleeve into the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle; meanwhile, the water storage block 113, the cushion block 100 and the sample chamber 101 are ejected out of the bottom of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; stopping pressurizing the auxiliary press; starting the pressure reducing button of the auxiliary press, moving the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, the nut protective sleeve and the sample unloading static rock pressure rod arranged on the nut protective sleeve, and moving the water storage block 113, the cushion block 100 and the sample chamber 101 out of the cylindrical hollow base.
Moving the sample chamber 101 to another smaller cylindrical hollow base of the auxiliary press, placing a nut protective sleeve on the top of the static rock pressure rod 105, and placing another longer sample unloading static rock pressure rod and the nut protective sleeve on the static rock pressure rod; starting an oil cylinder pressurizing button of the auxiliary press, feeding oil into the oil cylinder, pushing a piston rod to move downwards by oil pressure of the auxiliary press, increasing the oil pressure of the auxiliary press after the sample unloading static rock pressure rod and the nut protective sleeve are touched, and pressing the sample unloading static rock pressure rod and the nut protective sleeve into the sample chamber 101; meanwhile, the lower metal filter sheet 104, the cylindrical core sample 102 and the upper metal filter sheet 103 are ejected out of the bottom of the sample chamber 101; stopping pressurizing the auxiliary press; starting the pressure reducing button of the auxiliary press, moving the sample chamber 101, and moving the lower metal filter sheet 104, the cylindrical core sample 102, the upper metal filter sheet 103, the static rock pressure rod 105, the nut protective sleeve, and the sample unloading static rock pressure rod and the nut protective sleeve out of the bottom of the cylindrical hollow base.
(3) Seal part for disassembling top
The method comprises the following steps of (1) inverting an ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body on a cylindrical hollow base of an auxiliary press, flattening one end of a conical middle pressing ring 106 in a cavity, placing a longer sample unloading static rock pressing rod with the diameter consistent with that of a sample chamber 101, starting an oil cylinder pressurizing button of the auxiliary press, feeding oil into the oil cylinder, pushing a piston rod to move downwards by the oil pressure of the auxiliary press, increasing the oil pressure of the auxiliary press after the sample unloading static rock pressing rod is touched, and pressing the sample unloading static rock pressing rod into the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body; meanwhile, the top of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is ejected out of an upper pressure ring 110, an upper red copper pressure ring 109, a graphite pressure ring 108 and a lower red copper pressure ring 107; stopping pressurizing the auxiliary press; and starting a pressure reduction button of the auxiliary press, moving the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body and the sample unloading static rock pressure rod, and moving the upper pressure ring 110, the upper red copper pressure ring 109, the graphite pressure ring 108 and the lower red copper pressure ring 107 out of the cylindrical hollow base.
And cleaning the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, the top and bottom sealing parts of the kettle body, the sample chamber 101 and other parts. And replacing the lower red copper pressure ring 107, the graphite pressure ring 108, the upper red copper pressure ring 109 and the red copper sealing ring 116, and carrying out next sample loading work.
Cracking experiment of crude oil: in the sample chamber 101, the space of the cylindrical core sample 102 is completely replaced by a plurality of cushion blocks 100, different cushion blocks 100 can be selected according to the amount of required crude oil, and the diameter of a central opening is different. Crude oil is added into the high-pressure intermediate container in advance, and in an experiment, the crude oil is pumped into a pipeline connected with the high-pressure intermediate container and the lower right-angle elbow 120 through the ultrahigh-pressure electric pump and enters the sample chamber 101. The loading and unloading process is the same as the loading and unloading steps of the hydrocarbon source rock cylindrical core sample 102, except that the cylindrical core sample 102 is replaced by a different cushion block 100.
The ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body device has different parts, names, specifications and connection modes and different sample loading and unloading sequences, but has the functions of mainly installing the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body of the hydrocarbon source rock sample, simulating a pressure field and a geothermal field formed by the surrounding pressure, the dead rock pressure, the fluid pressure and the like of the deep-layer hydrocarbon source rock, providing the temperature, the fluid pressure, the dead rock pressure, the surrounding pressure and the limited hydrocarbon generation space (stratum pore space) for the hydrocarbon source rock sample, oil gas and other fluids in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body, and completing the hydrocarbon generation and discharge processes of the deep-layer hydrocarbon source rock and the detection before and after the experiment.
Claims (4)
1. An ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body comprises a middle sample chamber, a top sealing part and a bottom sealing part;
the middle sample chamber comprises a cylinder body and a sample chamber arranged in the cylinder body, and the sample chamber is in contact fit with the cylinder body;
the top sealing part and the bottom sealing part are respectively arranged at two ends of the sample chamber, and wedge-shaped self-tightening sealing is respectively arranged between the top sealing part and the bottom sealing part and the sample chamber;
applying confining pressure to the sample within the sample chamber is enabled by the top sealing member and the bottom sealing member;
the application of lithostatic pressure to the sample in the sample chamber can be achieved through the top sealing component;
a water storage block is arranged between the bottom sealing part and the sample chamber;
through holes communicated with the sample chamber are formed in the bottom sealing part and the top sealing part;
the top sealing component comprises a static rock pressure rod and a plurality of pressure rings sleeved on the static rock pressure rod, and wedge-shaped self-tightening sealing is arranged between the pressure rings;
the bottom of the static rock pressure rod is in contact fit with the sample chamber;
the static rock pressure rod is provided with the through hole along the radial direction;
the compression ring comprises a conical middle compression ring, a lower red copper compression ring, a graphite compression ring, an upper red copper compression ring, an upper compression ring and an upper pressing sleeve which are matched in sequence;
the plane end of the conical intermediate pressure ring is in contact fit with the sample chamber, and the convex conical end of the conical intermediate pressure ring is in wedge fit with the concave conical end of the lower red copper pressure ring;
two ends of the graphite pressure ring are respectively in contact fit with the plane ends of the lower red copper pressure ring and the upper red copper pressure ring;
the concave conical end of the upper red copper pressure ring is in wedge fit with the convex conical end of the upper pressure ring;
the top of the static rock pressure rod is in contact fit with the upper pressure ring middle sleeve;
the bottom sealing component comprises a self-tightening lower end cover, a red copper sealing ring, a lower pressure ring and a lower pressure sleeve which are matched in sequence;
the plane end of the self-tightening lower end cover is in contact fit with the water storage block, and the wedge-shaped end of the self-tightening lower end cover is in wedge fit with the red copper sealing ring;
the self-tightening lower end cover is provided with an inner wedge-shaped end surface;
the red copper sealing ring is provided with an external wedge-shaped end face.
2. The ultrahigh pressure and high temperature hydrocarbon generation and discharge kettle body according to claim 1, which is characterized in that: an upper metal filter sheet is arranged between the conical intermediate pressure ring and the sample chamber;
and a lower metal filter plate and a cushion block are sequentially arranged between the sample chamber and the water storage block.
3. The use method of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body as claimed in claim 1 or 2, which comprises the following steps:
loading a sample into the sample chamber of the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body of claim 1 or 2; then, two ends of the middle sample chamber are respectively matched with the top sealing part and the bottom sealing part in a sealing way and are placed in a box type heating furnace;
applying confining pressure and static rock pressure to the sample by using a hydraulic device;
communicating an assay fluid through the bottom sealing member, the sample chamber, and the top sealing member with a pump to create a fluid pressure;
heating the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body;
the confining pressure is applied by the following process:
controlling the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to move upwards by using the hydraulic device, so that the top sealing part or the upper pressing sleeve is in contact with the top of the box-type heating furnace to form confining pressure on the sample;
the process of applying the lithostatic pressure is as follows:
the hydraulic device is used for controlling the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body to move downwards, so that the static rock pressure rod is tightly pressed by the middle sleeve of the upper pressure ring, and the static rock pressure on the sample is formed;
the process of applying the fluid pressure is as follows:
the experimental fluid is communicated from the through hole in the top sealing part to a high-pressure three-way valve, and the high-pressure three-way valve is connected with a pressure sensor;
heating and temperature measurement of the sample are realized by using a temperature control thermocouple and a temperature measuring thermocouple;
the using method further comprises the following unloading process:
and opening a hydrocarbon discharging valve connected with the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body when the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body is cooled to 150-160 ℃, so that gaseous products in the ultrahigh-pressure high-temperature hydrocarbon generation and discharge kettle body enter a gas-liquid separator.
4. The use of the ultra-high pressure and high temperature hydrocarbon generation and discharge kettle body of claim 1 or 2 in simulating the hydrocarbon generation process and the hydrocarbon discharge process of deep source rock.
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