CN101916522A - Split-type source rock hydrocarbon generation simulation system and source rock hydrocarbon generation kettle - Google Patents
Split-type source rock hydrocarbon generation simulation system and source rock hydrocarbon generation kettle Download PDFInfo
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- CN101916522A CN101916522A CN2010102328192A CN201010232819A CN101916522A CN 101916522 A CN101916522 A CN 101916522A CN 2010102328192 A CN2010102328192 A CN 2010102328192A CN 201010232819 A CN201010232819 A CN 201010232819A CN 101916522 A CN101916522 A CN 101916522A
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Abstract
The invention discloses a split-type source rock hydrocarbon generation simulation system and a source rock hydrocarbon generation kettle. The system comprises a plurality of kettles, a plurality of temperature controllers, a computer and at least one pressure pump, wherein each kettle is coupled with one corresponding temperature controller; the plurality of temperature controllers are connected with the computer; the plurality of kettles are connected with the pressure pump through connecting pipelines respectively; the pressure pump is coupled with the computer and used for providing pressure for the kettles; the computer controls the temperature and temperature rise programs of the corresponding kettles through the temperature controllers; each kettle comprises a kettle shell with clamping groove, a kettle cover with clamping groove and a sealing plug; the kettle cover is engaged with the kettle shell; the sealing plug is provided with a sealing conical surface; a sealing member which is matched with the sealing plug is annularly arranged outside the sealing plug; and the side wall of the sealing member is contacted with the inner wall of the kettle shell. The system can simulate the same sample at different temperature points and also simulate different samples at the same temperature point. Meanwhile, the pressure resistance of the kettle is improved, and the research on the influence of the pressure on the hydrocarbon generation is made possible.
Description
Technical field
The invention relates to source rock and give birth to the hydrocarbon analogue technique, particularly about gold pipe die draft experiment system, is to give birth to hydrocarbon simulation system and the living hydrocarbon kettle of source rock about a kind of split-type source rock specifically.
Background technology
Under geologic condition, it is a very long and complicated geological process that organic source rock generates oil gas, is difficult to simulate fully this very very long geological process in the laboratory.Since Waples, after proposition temperature such as Lopatian can remedy the ground mass effect of time, people simulate the living hydrocarbon situation of source rock under geologic condition with regard to the method for utilizing simulated experiment, and source rock is given birth to hydrocarbon simulated experiment also becoming oil and gas resource evaluation and the very important means of hydrocarbon resources comparative study.
But because the simulation factor difference that different experimental techniques is considered, the experimental result of utilizing different analogue experiment methods to obtain often has bigger difference.Present simulation experiment device is divided into open system, closed system and semi-open system according to the degree of opening of experimental system.Organic source rock is given birth to the geological process that hydrocarbon is a Bian Shengbian row under the geologic condition.Open system is the simulation experiment device type that occurs the earliest, though its simulated experiment process also is a kind of Bian Shengbian row's a living hydrocarbon process, the hydrocarbon that source rock generates under the geologic condition is not to discharge to enter reservoir at once; And the open system simulated experiment generally only considers temperature to giving birth to the influence of hydrocarbon process, and can't simulated pressure source rock be given birth to the influence of hydrocarbon process.Though and semi-open simulated system near geologic condition, be subjected to the restriction of present technological means, also be difficult to real the realization at present.The analogue experiment method of closed system is the simulated experiment means most widely used at present, that effect is best.
In semi-open simulated system, gold pipe die draft experiment system is a kind of temperature of both having considered, considers extraneous hydrodynamic pressure experimental system for simulating again, and scholars relatively approve.But present gold pipe die draft experiment system is a kind of all-in-one-piece experimental system, a plurality of reaction kettle bodies of experimental simulation all in a heating system (for example, a plurality of reaction kettle bodies all are placed in the furnace chamber of heating furnace), can not carry out independent control to the reaction conditions of single kettle, bring inconvenience to experiment.
Summary of the invention
The invention provides that a kind of split-type source rock is given birth to the hydrocarbon simulation system and source rock is given birth to the hydrocarbon kettle, improving experimental temperature and pressure, and control the temperature of each kettle separately.
To achieve these goals, in one embodiment, provide a kind of split-type source rock to give birth to the hydrocarbon simulation system, described system comprises: a plurality of kettlies, a plurality of temperature controllers, computing machine and at least one forcing pump; Described a plurality of kettle is corresponding one by one with a plurality of temperature controllers, and each described kettle couples mutually with corresponding temperature controller, described a plurality of temperature controller is connected with computing machine respectively, described a plurality of kettle is connected with forcing pump by associated line respectively, and described forcing pump couples mutually with described computing machine; Wherein, described forcing pump is used for providing pressure to described kettle inside; Described computing machine is controlled the temperature and the heating schedule of corresponding kettle by temperature controller; Described kettle comprises: the kettle shell that has draw-in groove; Have the kettle lid of draw-in groove, engage with described kettle shell; Seal plug has sealing cone; The outer seal that matches with it that is equipped with of described seal plug; The sidewall of described seal contacts with the inwall of described kettle.
To achieve these goals, in another embodiment, also provide a kind of source rock to give birth to the hydrocarbon kettle, described kettle comprises: the kettle shell that has draw-in groove; Have the kettle lid of draw-in groove, engage with described kettle shell; Seal plug has sealing cone; The outer seal that matches with it that is equipped with of described seal plug; The sidewall of described seal contacts with the inwall of described kettle shell.
The useful technique effect of the embodiment of the invention: the present invention can simulate in different temperature points same sample, also can simulate at same temperature spot different samples.The compressive property of kettle is improved simultaneously, provides possibility for inquiring into pressure to the influence of giving birth to hydrocarbon.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.In the accompanying drawings:
Fig. 1 gives birth to the structural representation of hydrocarbon simulation system for embodiment of the invention split-type source rock;
Fig. 2 gives birth to the structural representation of hydrocarbon simulation system for another embodiment of the present invention split-type source rock;
Fig. 3 gives birth to the concrete composition synoptic diagram of hydrocarbon simulation system for embodiment of the invention split-type source rock;
Fig. 4 is the methane production experimental result contrast synoptic diagram of two groups of experiments of the embodiment of the invention;
Fig. 5 is the Methane Carbon Isotope experimental result contrast synoptic diagram of two groups of experiments of the embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, the embodiment of the invention is described in further details below in conjunction with accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
As shown in Figure 1, the invention provides a kind of split-type source rock and give birth to the hydrocarbon simulation system, described system comprises: a plurality of kettlies 101, a plurality of temperature controllers 102, computing machine 103 and at least one forcing pump 104; Described a plurality of kettle 101 is corresponding one by one with a plurality of temperature controllers 102, and each described kettle 101 couples (only showing a kettle among the figure) mutually with corresponding temperature controller 102, described a plurality of temperature controller 102 be connected with computing machine 103 respectively (only showing a temperature controller among the figure), described a plurality of kettle 101 is connected with forcing pump 104 by associated line 116 respectively, and described forcing pump 101 couples mutually with described computing machine 103; Wherein, described forcing pump 104 is used for providing pressure to described kettle 101 inside; Described computing machine 101 is controlled the temperature and the heating schedule (heating rate, for example the heating rate of a certain kettle is set at 2 ℃/hour) of corresponding kettle by temperature controller.
Described kettle 101 comprises: the kettle shell 105 that has draw-in groove; Have the kettle lid 106 of draw-in groove, the draw-in groove of kettle lid 106 engages with the draw-in groove of described kettle shell; Seal plug 107 has sealing cone; The outer seal 108 that matches with it that is equipped with of described seal plug 107; The sidewall of described seal 108 contacts with the inwall of described kettle shell 105.
The pressure that forcing pump 104 the provides crush seal plug 107 that to make progress, for guarantee seal plug can be good to around squeeze sealing member, described sealing cone is gradually-reducing shape according to the direction that acts on described seal plug upward pressure, and promptly sealing cone is along the direction that makes progress among Fig. 1 and reduces shape.
When the pressure that provides when forcing pump compresses seal plug, seal plug will to around squeeze sealing member, seal will produce outside power and compress inner wall of kettle under the extruding force effect of seal plug, played good sealing function, in addition, can also place a copper backing 109 between seal plug and kettle lid, copper backing has good ductility, can make under the squeezing action of seal plug between kettle lid and the kettle shell contact tightr.
The section of described seal plug can comprise rectangle part and trapezoidal portions, also can be for trapezoidal, and the section of seal plug comprises rectangle part and trapezoidal portions among Fig. 1.The section of Fig. 2 seal plug is trapezoidal.
Described kettle also comprises: material basket 110, be positioned at described kettle inside, and be used to place the gold pipe 111 that source rock is housed.
Outer wall at described kettle shell 105 is with steel bushing 112, can play insulation effect; Embedded thermopair 114 and many heating rods 113 (heating rod only is shown among the figure) in the described steel bushing, heating rod 113 is used to heat described kettle; Thermopair 114 is embedded in the described steel bushing, is used to measure the temperature of described kettle.Described temperature controller couples mutually with described heating rod 113 and thermopair 114, and computing machine 103 is heated to described kettle by the control temperature controller temperature of setting according to the temperature of thermopair 114 measurement kettlies.Described kettle also comprises: heat-insulation layer 115 is enclosed within the outer wall of described steel bushing, to reduce scattering and disappearing of kettle heat.
Fig. 3 gives birth to the concrete composition synoptic diagram of hydrocarbon simulation system for embodiment of the invention split-type source rock.Only show two kettlies among the figure, split-type source rock of the present invention is given birth to the hydrocarbon simulation system can a plurality of kettlies (more than or equal to 20 kettlies).A plurality of kettlies 101 are corresponding one by one with a plurality of temperature controllers 102, and each described kettle 101 couples mutually with corresponding temperature controller 102, described a plurality of temperature controller 102 is connected with computing machine 103 respectively, described a plurality of kettle 101 is connected with forcing pump 104 by associated line 116 respectively, and described forcing pump 101 couples mutually with described computing machine 103.
Described split-type source rock is given birth to the hydrocarbon simulation system and is also comprised: vacuum tank 117 and vacuum pump 118, and vacuum tank 117 is used to place described kettle, to reduce scattering and disappearing of kettle heat; Vacuum pump 118 connects described vacuum tank 117.
Described seal plug can be the alloy seal plug; Described seal can be graphite seal, and the present invention is not exceeded according to this.
Split-type source rock is given birth to the hydrocarbon simulation system and by computing machine each reaction kettle body in the system is carried out independent temperature and heating schedule control (heating rate control etc.), can carry out arbitrary combination to the reaction conditions of each reaction kettle body well according to the research needs, for the utilization ratio that shortens the whole simulated experiment time, improves experimental system for simulating provides very big convenience, be that various catalytic action and synthetic the providing of inorganic hydro carbons that the research source rock is given birth in the hydrocarbon process may.
Traditional analogue experiment method generally the highest experimental temperature can only reach 600 ℃, pressure and reaches 50MPa, under this temperature and pressure, organic source rock can not be released fully at such temperature and pressure condition hydrocarbon generation capacity, has influenced the effect of experimental data widely.
The present invention is by changing kettle structure and selecting different experiment type of heating, the highest analog temperature that split-type source rock is given birth to the hydrocarbon simulation system is brought up to 800 ℃, the maximum of kettle and is born pressure and bring up to 120MPa, for the hydrocarbon generation capacity that reflects organic source rock fully provides may.The highest simulated pressure has been brought up to 120MPa, provides possibility for inquiring into pressure to the influence of giving birth to the hydrocarbon effect.
The sport technique segment of key of the present invention comprises a reaction kettle body High Temperature High Pressure sealing, automatic control system and three aspects of heat-insulation system.
1) sealing under selection of reactor material and the high-temperature and high-pressure conditions
It is a cover high temperature, high-pressure sealed simulated experiment system that split-type source rock is given birth to the hydrocarbon simulation system, and maximum pressure is 120MPa, and the highest analog temperature is 800 ℃.The present invention makes the Ns312 nickel-base alloy Alloy 600 (Ni-Cr-Fe) that the material of kettle can be selected, Ni-Cr-Fe is a kind of heat-resisting, corrosion-resistant, high-intensity construction material of standard, its tensile strength in the time of 800 ℃ reaches 531Mpa, yield strength 230Mpa, be well positioned to meet the kettle requirement of this experiment, the present invention is not exceeded according to this, and any material that other possesses above-mentioned performance can replace Ni-Cr-Fe to make kettle.Under the effect of forcing pump, the impressed pressure fluid enters kettle from autoclave body bottom, and sealing means is as shown in Figure 1 adopted at the kettle top, has the conical surface seal plug and the graphite circle seals.Under condition of high voltage, internal pressure is higher than ambient pressure, by locking compacting soft graphite seal, make it produce extensional deformation, thereby sealing effectiveness is better.
2) automatic control system
Native system is selected split type analog machine, and each reaction kettle body has independently heating system, can carry out independently temperature control by computer control to different reaction kettle bodies according to the experiment needs.
3) heat-insulation system
For guarantee different depth position temperature in the reactor evenly, adopt the electrical bar of lengthening, make effective heating interval more uniform temperature.Simultaneously in order to guarantee that environment temperature is unlikely too high in the experimentation, each reaction kettle body insulation asbestos (steel bushing) has increased the vacuum tank 117 of a hollow on every side, vacuum pump can vacuumize vacuum tank 117, both reduced scattering and disappearing of reaction kettle body heat, can making in the laboratory not again, the heating because of reactor causes temperature to raise.
In simulated experiment process of the present invention, same sample both can have the simulated experiment of applying fluid pressure, can not have the simulated experiment of applying fluid pressure simultaneously again; In experimentation, can carry out the simulated experiment of different heating rates simultaneously to same sample.
The present invention is applicable to hydrocarbon source rock oil generation, angry research, crude oil pyrolysis research, inorganic synthetic, pressure the further discussion of oil gas nucleus formation, the influence that different catalysts generates oil gas.This is sheathed to have 20 independent reactors, can simulate in different temperature points same sample, also can simulate at same temperature spot different samples.Experimental result is except having wide practical use aspect the oil and gas resource evaluation, simultaneously by carbon, hydrogen isotope analysis, good directive function is all arranged for the build environment of determining hydrocarbon-bearing pool and matrix source and source-source contrast and oil-to-source correlation to biomarker analysis and important component in the simulation product.
Split-type source rock of the present invention is given birth to the hydrocarbon simulation system and is given birth to the hydrocarbon simulation system with the monoblock type source rock, adopts identical applying fluid pressure and identical heating rate condition to simulate angry the experiment to same sample, the experimental result that obtains good consistance is arranged.But the present invention can carry out the experiment of different heating rates simultaneously to same sample, and its conventional efficient is greatly improved.
Gold pipe die draft experiment system is the experimental system for simulating of a cover sealing, and it is an at present most widely used cover simulated experiment system, and it is the earliest by external development.It all is all-in-one-piece thermal simulation experiment system that present source rock is given birth to the hydrocarbon simulation system, and all in same heating systems, if different kettle needs different heating rates, the monoblock type simulated system is just powerless for all reaction kettle bodies.Split-type source rock is given birth to the hydrocarbon simulation system 20 reaction kettle bodies, each kettle is placed in the independent heating system, and heating system can be carried out the independent control of temperature, pressure and heating rate by computing machine, this freely selects to have brought very big convenience to different experimental conditions, as shown in Figure 3.
Give birth to the reliability of hydrocarbon simulation system in order to verify split-type source rock of the present invention, under the 50MPa pressure condition, utilize monoblock type and split-type source rock to give birth to the hydrocarbon simulation system respectively, the heating rate of setting 2 ℃/hour and 20 ℃/hour has carried out simulated experiment to same sample.Fig. 4 is the methane production experimental result contrast synoptic diagram of two groups of experiments of the embodiment of the invention; Fig. 5 is the Methane Carbon Isotope experimental result contrast synoptic diagram of two groups of experiments of the embodiment of the invention; Can find from figure: the productive rate of gas key component-methane that two cover simulated experiment systems are produced is all more consistent with the carbon isotope result, and split-type source rock to give birth to hydrocarbon simulation system methane under 2 ℃/hour and 20 ℃ of/hour two kinds of heating rate conditions in the time of 650 ℃ very approaching, can reflect the complete angry process of organic matter substantially fully.
The useful technique effect of the embodiment of the invention: the present invention can simulate in different temperature points same sample, also can simulate at same temperature spot different samples.The compressive property of kettle is improved simultaneously, provides possibility for inquiring into pressure to the influence of giving birth to hydrocarbon.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a split-type source rock is given birth to the hydrocarbon simulation system, it is characterized in that described system comprises: a plurality of kettlies, a plurality of temperature controllers, computing machine and at least one forcing pump;
Described a plurality of kettle is corresponding one by one with a plurality of temperature controllers, and each described kettle couples mutually with corresponding temperature controller, described a plurality of temperature controller is connected with computing machine respectively, described a plurality of kettle is connected with forcing pump by associated line respectively, and described forcing pump couples mutually with described computing machine; Wherein,
Described forcing pump is used for providing pressure to described kettle inside;
Described computing machine is controlled the temperature and the heating schedule of corresponding kettle by temperature controller;
Described kettle comprises:
The kettle shell that has draw-in groove;
Have the kettle lid of draw-in groove, engage with described kettle shell;
Seal plug has sealing cone;
The outer seal that matches with it that is equipped with of described seal plug; The sidewall of described seal contacts with the inwall of described kettle.
2. the system as claimed in claim 1 is characterized in that, described kettle also comprises: pad is held between described kettle lid and the seal plug.
3. system as claimed in claim 1 or 2 is characterized in that the section of described seal plug comprises rectangle part and trapezoidal portions.
4. system as claimed in claim 1 or 2 is characterized in that, the section of described seal plug is trapezoidal.
5. the system as claimed in claim 1 is characterized in that, described sealing cone is gradually-reducing shape according to the direction that acts on described seal plug upward pressure.
6. the system as claimed in claim 1 is characterized in that, described kettle also comprises: the material basket, be positioned at described kettle inside, and be used to place the gold pipe that source rock is housed.
7. the system as claimed in claim 1 is characterized in that, described kettle also comprises: steel bushing is enclosed within the outer wall of described kettle shell.
8. the system as claimed in claim 1 is characterized in that, described kettle also comprises: many heating rods, be embedded in the described steel bushing, and be used to heat described kettle.
9. system as claimed in claim 5 is characterized in that, described kettle also comprises: thermopair, be embedded in the described steel bushing, and be used to measure the temperature of described kettle.
10. system as claimed in claim 9 is characterized in that, described temperature controller couples mutually with described heating rod and thermopair.
11. as claim 7 or 10 described systems, it is characterized in that described kettle also comprises: heat-insulation layer is enclosed within the outer wall of described steel bushing.
12., it is characterized in that described system also comprises as claim 1 or 11 described systems: vacuum tank, be used to place described kettle, do not scatter and disappear to keep the kettle temperature.
13. system as claimed in claim 12 is characterized in that, described system also comprises: vacuum pump connects described vacuum tank.
14. the system as claimed in claim 1 is characterized in that, described seal plug is the alloy seal plug.
15. the system as claimed in claim 1 is characterized in that, described seal is a graphite seal.
16. a source rock is given birth to the hydrocarbon kettle, it is characterized in that described kettle comprises:
The kettle shell that has draw-in groove;
Have the kettle lid of draw-in groove, engage with described kettle shell;
Seal plug has sealing cone;
The outer seal that matches with it that is equipped with of described seal plug; The sidewall of described seal contacts with the inwall of described kettle shell.
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