CN107656318B - The determination method and apparatus of Geologic Time - Google Patents
The determination method and apparatus of Geologic Time Download PDFInfo
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- CN107656318B CN107656318B CN201710742032.2A CN201710742032A CN107656318B CN 107656318 B CN107656318 B CN 107656318B CN 201710742032 A CN201710742032 A CN 201710742032A CN 107656318 B CN107656318 B CN 107656318B
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- 229910052770 Uranium Inorganic materials 0.000 description 44
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 43
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 30
- 229910052776 Thorium Inorganic materials 0.000 description 25
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- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
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- WABPQHHGFIMREM-BJUDXGSMSA-N lead-206 Chemical class [206Pb] WABPQHHGFIMREM-BJUDXGSMSA-N 0.000 description 1
- WABPQHHGFIMREM-OUBTZVSYSA-N lead-208 Chemical compound [208Pb] WABPQHHGFIMREM-OUBTZVSYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
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Abstract
The present invention provides a kind of determination method and apparatus of Geologic Time, wherein this method comprises: determining the energy released when each first nucleic all decays in multiple first nucleic of the natural radionuclide of sample to be tested；Determine that sample to be tested irradiates the fission energy for occurring to be discharged when nuclear fission in nuclear reactor；Determine generated sedimentary energy when sample to be tested irradiates in nuclear reactor；Energy, fission energy and the sedimentary energy released when all being decayed according to each first nucleic determines the first Geologic Time experienced during sample to be tested simulation nuclear decay.In embodiments of the present invention, by to during nuclear fission on sample to be tested sedimentary energy and fission energy accurately calculate, natural radionuclide all decays the gross energy finally released in comparison sample to be tested, so that it is determined that sample to be tested simulation nuclear decay Geologic Time experienced out.
Description
Technical field
The present invention relates to technical field of geological exploration, in particular to the determination method and apparatus of a kind of Geologic Time.
Background technique
Oil-gas geology prospecting results show that the radioactivity phenomenon of deep hydrocarbon source rock and oil bearing reservoir is generally more serious.This
The radioactivity on a little stratum mostlys come from the natural radionuclides such as uranium, thorium, potassium α released in natural decay process and penetrates
Line, β ray and gamma-rays.Atomic nucleus can generate certain mass loss during natural decay, and release certain
Energy；Meanwhile alpha ray, β ray and gamma-rays and ambient substance effect can also generate certain heat.Above-mentioned this two
Point due to radionuclide during natural decay generated energy be properly termed as radioactivity genesis heat.Geology buries condition
Lower caused enclosed environment, can make radioactivity genesis heat generate cumulative function, finally accumulate obtained radioactivity genesis
Heat has more apparent influence for the evolution of organic matter maturation.
Known to research based on radionuclide decay process: since radioactivity phenomenon is caused by atomic nucleus interior change
, the state change relationship with electron outside nucleus is smaller, therefore, can only cause the temperature of electron outside nucleus state change, pressure and
Magnetic field cannot influence the decay process of radionuclide significantly.That is, the influence that nuclear decay develops for organic matter maturation
It is related with the content of radionuclide and stratum Geologic Time experienced, and it is unrelated with the background of Geological Evolution, it is independent
Existing for the Geological Evolutions events such as diagenesis, buried hypogenesis and igneous invasion baking.
To sum up, during determining nuclear decay when Geologic Time experienced, due to nuclear decay process pair under geological conditions
The effect of organic matter hydrocarbon generation is a long-term process, and the time of required consumption is longer, thus, it can not be in laboratory conditions
Effect of the nuclear decay process to organic matter hydrocarbon generation under geological conditions directly is simulated, it certainly also just can not be straight in laboratory conditions
It connects and determines nuclear decay process Geologic Time experienced.
For the determination problem of above-mentioned Geologic Time, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides a kind of determination method and apparatus for simulating nuclear decay Geologic Time, to solve existing skill
Effect of the nuclear decay process to organic matter hydrocarbon generation under geological conditions can not be directly simulated in art in laboratory conditions, also can not
The problem of determining nuclear decay process Geologic Time experienced.
The embodiment of the invention provides a kind of determination methods of Geologic Time, may include: the natural of determining sample to be tested
The energy released when each first nucleic all decays in multiple first nucleic of radionuclide；It determines described to test sample
Product irradiate the fission energy for occurring to be discharged when nuclear fission in nuclear reactor；Determine the sample to be tested in nuclear reactor
Generated sedimentary energy when irradiation；Energy, the core released when all being decayed according to each first nucleic is split
Become energy and the sedimentary energy, determines the first Geologic Time experienced during the sample to be tested simulation nuclear decay.
In one embodiment, energy, the core released when all being decayed according to each first nucleic is split
Become energy and the sedimentary energy, determines sample to be tested simulation nuclear decay first Geologic Time experienced, can wrap
It includes: calculating separately the ratio between the energy that simulation is released when decay energy and each first nucleic all decay
Value, obtains multiple simulation nuclear decay ratios corresponding with the multiple first nucleic, wherein decay energy is for the simulation
The fission energy and the sedimentary energy and；It determines to meet preset requirement in the multiple simulation nuclear decay ratio
Several simulation nuclear decay ratios；Meet the simulation nuclear decay ratio of preset requirement according to described several, determines described to be measured
Sample simulates the first Geologic Time experienced during nuclear decay.
In one embodiment, the preset requirement is simulation nuclear decay ratio less than 1.
In one embodiment, meet the simulation nuclear decay ratio of preset requirement according to described several, determine it is described to
Sample simulates the first Geologic Time experienced during nuclear decay, may include: to meet default want according to described several
The simulation nuclear decay ratio asked, described several meet each simulation nuclear decay ratio in the simulation nuclear decay ratio of preset requirement
The half-life period of the second corresponding nucleic is calculated each second nucleic decay in several second nucleic and generates the simulation
Second Geologic Time required when decay energy；Using the minimum value in several second Geologic Times as the sample to be tested
First Geologic Time experienced during simulation nuclear decay.
In one embodiment, each second nucleic in several second nucleic can be calculated according to following formula to decline
Sell of one's property the raw simulation decay energy when required the second Geologic Time:
Wherein, TiIndicate the decay of i-th second nucleic generate the simulation decay energy when required second geology when
Between, θiIndicate simulation nuclear decay ratio, T corresponding to i-th of second nucleic1/2Indicate the half-life period of i-th of second nucleic.
In one embodiment, determine that the sample to be tested irradiates the core for occurring to be discharged when nuclear fission in nuclear reactor
Fission energy may include: the nucildic mass for calculating the sample to be tested irradiation and nuclear fission occurring；According to the nucildic mass with
And the situation of change of sample energy before and after nuclear fission occurs, it determines that the sample to be tested irradiates in nuclear reactor and nuclear fission occurs
When the fission energy that is discharged.
In one embodiment, generated sedimentary energy when the sample to be tested irradiates in nuclear reactor is determined, it can
With include: exposure spots position according to the physical property, the sample to be tested of the sample to be tested in nuclear reactor, it is described to
Nuclear reactor physics ginseng when irradiation time of the sample in nuclear reactor, the sample to be tested irradiate in nuclear reactor
Number, simulation determine generated sedimentary energy when the sample to be tested irradiates in nuclear reactor.
In one embodiment, the physical property of the sample to be tested can include but is not limited at least one of: institute
Density, volume, thickness and the weight of sample to be tested are stated, the nuclear reactor physical parameter may include: the particle kind of radiation source
Particle kind when class and/or irradiation.
In one embodiment, the first Geologic Time experienced during determining the sample to be tested simulation nuclear decay
It later, can also include: that the hydrocarbon potentiality of test sample are determined according to first Geologic Time.
The embodiment of the invention also provides a kind of determining devices of Geologic Time, may include: decay energy determining module,
It is determined for each first nucleic whole decay when institute in multiple first nucleic of the natural radionuclide of sample to be tested
The energy released；Fission energy determining module is determined for the sample to be tested and irradiates generation core in nuclear reactor
The fission energy discharged when fission；Sedimentary energy determining module is determined for the sample to be tested in nuclear reactor
Generated sedimentary energy when middle irradiation；Geologic Time determining module can be used for all being declined according to each first nucleic
Energy, the fission energy and the sedimentary energy released when change determines the sample to be tested simulation nuclear decay
First Geologic Time experienced in journey.
In one embodiment, the Geologic Time determining module may include: the first decay ratio-dependent unit, can be with
For calculating separately the ratio between the energy that simulation is released when decay energy and each first nucleic all decay
Value, obtains simulation nuclear decay ratio corresponding with the multiple first nucleic, wherein decay energy is described for the simulation
Fission energy and the sedimentary energy and；Second decay ratio-dependent unit, is determined for out the multiple simulation
Meet several simulation nuclear decay ratios of preset requirement in nuclear decay ratio；Geologic Time computing unit, can be used for basis
Described several meet the simulation nuclear decay ratio of preset requirement, determine that the sample to be tested simulation nuclear decay is undergone in the process
The first Geologic Time.
In embodiments of the present invention, the process for generating nuclear fission based on nuclear reactor irradiation sample to be tested and releasing energy,
To simulate the nuclear decay process during earth history.By to during nuclear fission on sample to be tested sedimentary energy and
Fission energy accurately calculates, and compares natural radionuclide in sample to be tested and all decays the gross energy finally released, from
And determine sample to be tested simulation nuclear decay Geologic Time experienced during nuclear decay.As employed in the application
Nuclear fission process time-consuming is short, it is easy to accomplish, so that solving directly can not simulate ground in laboratory conditions in the prior art
Effect of the nuclear decay process to organic matter hydrocarbon generation under the conditions of matter can not also determine nuclear decay process Geologic Time experienced
Problem.Further, the hydrocarbon potentiality of test sample are determined based on above-mentioned Geologic Time.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of determination method flow diagram of Geologic Time provided by the present application；
Fig. 2 is a kind of a kind of structural block diagram of the determining device of Geologic Time provided by the present application.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without creative efforts
Range.
It should be noted that term " first ", " second " etc. are used for description purposes only and distinguish in the description of the present application
Similar object between the two and is not present sequencing, can not be interpreted as indication or suggestion relative importance.In addition,
In the description of the present application, unless otherwise indicated, the meaning of " plurality " is two or more.
When in view of determining nuclear decay process Geologic Time experienced, due under geological conditions nuclear decay process to organic
The effect of matter hydrocarbon is a long-term process, and the time of required consumption is longer, can not directly be simulated in laboratory conditions.
It has been proposed can use nuclear reactor in the prior art to sample to be tested progress neutron irradiation, passes through induced activity nucleic
Fission, to realize the simulation of nuclear decay process.But above-mentioned simulated experiment is applied to an actual mostly important step, as
Calculate simulated nuclear decay Geologic Time.However do not propose the method about determining Geologic Time in the prior art, because
This, is inventors herein proposed during being irradiated in nuclear reactor using sample to be tested, because of radioactivity genesis caused by particle bombardment
The method that heat quantitatively calculates simulation nuclear decay Geologic Time experienced, the nuclear fission discharged when based on sample to be tested nuclear fission
Energy, sedimentary energy are warm to simulate radioactivity genesis released in above-mentioned nuclear decay process, and combine each first nucleic
The energy all released when decay determines that in each first nucleic the nuclear decay that nuclear decay generates simulation occurs for sample to be tested
Geologic Time required for radioactivity genesis heat.Based on this, a kind of determination method of Geologic Time is proposed, as shown in Figure 1, can
With the following steps are included:
S101: determine that each first nucleic is whole in multiple first nucleic of multiple natural radionuclides of sample to be tested
The energy released when decay.
In the present embodiment, when can first calculate each first nucleic whole decay in multiple first nucleic of sample to be tested
The energy released.Wherein, natural radionuclide can be the general designation of the first nucleic in radioactive decay series, that is,
Natural radionuclide can be made of multiple first nucleic, wherein it is worth noting that, the first nucleic is day heat emission
Nucleic in nucleic, in order to be distinguished with the second nucleic hereinafter, so the first nucleic is depicted here as, in the application
In the first nucleic and the second nucleic refer to nucleic, and do not have other particular meanings.First nucleic whole decay when institute
The energy released also refers to the energy released when all decaying, and as only a kind of natural radionuclide is all sent out
The energy that raw nuclear decay is released does not include that the energy that nuclear decay is released occurs for other radionuclides.Wherein, it naturally puts
Penetrating property nucleic may include: to the uranium series of lead -206, headed by uranium -235 headed by uranium -238 to the actinium series of lead -207, with thorium -
The atomic numbers such as natural radionuclide and carbon-14, kalium-40 headed by 232 to atomic numbers such as the thorium familys of lead -208 greater than 82
Natural radionuclide of the number less than 81.In one embodiment of the application, the natural radionuclide of sample to be tested is main
May include: uranium element multiple isotopes (hereinafter referred to as uranium element refers specifically to:238U、235U、234U), potassium member
Element (it refers specifically in this application:40K), thorium element (refer specifically in this application:232Th).It is, of course, also possible to include
Other natural radionuclides such as above-mentioned carbon, as long as the natural radionuclide for meeting selected measurement is at least 3 kinds
Requirement, specially which kind of natural radionuclide, the application be not construed as limiting this.
It, can be according to lower section when the natural radionuclide of sample to be tested is respectively uranium element, potassium element, thorium element
Formula calculates the ENERGY E 1 released when each first nucleic all decays in multiple first nucleic of sample to be tested:
S1-1: content of the measurement sample to be tested in uranium element, thorium element and potassium element contained by predose.
The sample to be tested that can have been mixed well a little with accurate weighing, it is accurate to measure after being processed into solution by the way that acid is molten
Uranium content, thorium content and the potassium content of the sample to be tested predose.Wherein, sample to be tested needs that fine ground mill is even to be to sample particle diameter
74 μm hereinafter, the weight of weighed sample to be tested weighs accuracy and is not less than 10 μ g not less than 0.10000g.
It can choose the acid solutions such as nitric acid, hydrofluoric acid when sour molten processing, which should be excellent pure grade；In conjunction with electricity
After sample to be tested is carried out the molten processing of acid not less than the ultrapure water of 18M Ω by resistance rate, through inductively coupled plasma mass spectrometry, electricity
Sense Coupled Plasma spectroscopy measures the concentration of uranium, thorium, potassium respectively, and then calculates uranium, thorium, potassium content in sample to be tested.
Wherein, uranium element contained in nitric acid, hydrofluoric acid and ultrapure water, the thorium element progress obtained blank content of blank test are equal
Lower than 10-9g L-1, potassium blank content be lower than 10-6g L-1.Uranium in sample, thorium content results should be accurate to 10-9G, potassium contain
Amount measurement result should be accurate to 10-6g。
S1-2: it is calculated according to the quality of sample to be tested in conjunction with the content of above-mentioned uranium element, thorium element and potassium element
The quality m of uranium element into sample to be testedU 1, thorium element quality mTh 1, potassium element quality mK 1。
Can the sample to be tested of accurate weighing predetermined quality again uranium element is calculated according to the content of above-mentioned uranium, thorium, potassium
Quality mU 1, thorium element quality mTh 1, potassium element quality mK 1.Wherein, the quality of the sample to be tested weighed again is not less than
1.00000g weighs accuracy and is not less than 10 μ g.The uranium that is calculated, thorium, three kinds of elements of potassium Mass accuracy not less than 10- 9g。
S1-3: complete in conjunction with uranium element, thorium element and potassium element according to the quality of uranium element, thorium element and potassium element
The situation of change of energy in energy equation when portion's nuclear decay calculates separately to obtain uranium element whole decay when institute in sample to be tested
The energy that the energy and potassium element that energy, the thorium element released is released when all decaying are released when all decaying
E1。
By the energy released when each first nucleic all decays can be calculated according to following formula:
Wherein, E1iIndicate the energy released when i-th of radionuclide all decays, Δ miIndicate i-th of radiation
Property nucleic all decay front and back mass change, c=299792458m/s.Due to mole of each radionuclide in the application
Quality is different, so can also distinguish each radionuclide based on molal weight, that is, utilizesTo indicate molal weight
The energy released when all being decayed by the radionuclide of k.
In one embodiment of the application, work as calculating238U all decay released energy when, due to238U is complete
It will become after decay206Pb releases 8 in the process4He particle and 6 electronics, reaction energy equation indicate are as follows:238U
→206Pb+84He+6e-Therefore E can be calculated according to following formula in+energy238 1:
E238 1=Δ mC2=0.99275 × mU 1/238.0508×(238.0508-205.9744-8×4.0026-4×0)
×10-3×2997924582=20749.5049 × 106×mU 1, unit is joule (J).Wherein, 0.99275 is238U is in nature
Isotope abundance in boundary, 238.0508 are238The molal weight of U, 205.9744 are206The molal weight of Pb, 4.0026 be helium
Particle (4He molal weight), 0 is electronics (e-) molal weight, 10-3For gram to kilogram conversion coefficient, E238 1As E1.
In another embodiment of the application, work as calculating235U all decay released energy when, due to235U is complete
It will become after full decay207Pb releases 7 in the process4He particle and 4 electronics, reaction energy equation indicate are as follows:235U
→207Pb+74He+4e-Therefore E can be calculated according to following formula in+energy235 1:
E235 1=Δ mC2=0.00720 × mU 1/235.0439×(235.0439-206.9759-7×4.0026-4×0)
×10-3×2997924582=136.5272 × 106×mU 1, unit J.Wherein, 0.00720 is235U in nature same
The plain abundance in position, 235.0439 are235The molal weight of U, 206.9759 are207The molal weight of Pb, 4.0026 are4Mole matter of He
Amount, 0 is e-Molal weight, 10-3For gram to kilogram conversion coefficient, E235 1As E1.
In another embodiment of the application, work as calculating234U all decay released energy when, due to234U is complete
It will become after full decay206Pb releases 7 in the process4He particle and 4 electronics, reaction energy equation are234U
→206Pb+74He+4e-Therefore E can be calculated according to following formula in+energy234 1:
E234 1=Δ mC2=0.00005 × mU 1/234.0409×(234.0409-205.9744-7×4.0026-4×0)
×10-3×2997924582=0.9234 × 106×mU 1, unit J.Wherein, 0.00005 is234The same position of U in nature
Plain abundance, 234.0409 are234The molal weight of U, 205.9744 are206The molal weight of Pb, 4.0026 are4Mole matter of He
Amount, 0 is e-Molal weight, 10-3For gram to kilogram conversion coefficient, E234 1As E1.
In another embodiment of the application, work as calculating232Th all decay released energy when, due to232Th
It will become after decay completely208Pb releases 6 in the process4He particle and 4 electronics, reaction energy equation are232Th
→208Pb+64He+4e-+ energy, therefore, E232 1It should be calculated in accordance with following formula:
E232 1=Δ mC2=1.00000 × mU/232.0380×(232.0380-207.9766-6×4.0026-6×0)
×10-3×2997924582=17670.0042 × 106×mTh 1, unit J.Wherein, 1.00000 are232Th is in nature
Isotope abundance, 232.0380 are232The molal weight of Th, 207.9766 are208The molal weight of Pb, 4.0026 are4He's
Molal weight, 0 is e-Molal weight, 10-3For gram to kilogram conversion coefficient, E232 1As E1.
In another embodiment of the application, work as calculating40K all decay released energy when, due to40K is complete
It will become after decay40Ca, releases 1 electronics in the process, and reaction equation is40K→40Ca+e-+ energy, therefore, E40 1It should abide by
It is calculated according to following formula:
E40 1=Δ mC2=0.000117 × mU/39.9640×(39.9640-39.9626-1×0)×10-3×
2997924582=0.3684 × 106×mK 1, unit J.Wherein, 0.000117 is40The isotope abundance of K in nature,
39.9640 are40The molal weight of K, 39.9626 are40The molal weight of Ca, 0 is e-Molal weight, 10-3For gram to kilogram
Conversion coefficient, E40 1As E1.
In the present embodiment, it can be calculated according to above-mentioned S1-1 to S1-3 each in multiple radionuclides of sample to be tested
Multiple gross energy E1 that a first nucleic is released when all decaying, so as to lay base for subsequent calculating Geologic Time
Plinth.
S102: it calculates sample to be tested and irradiates the fission energy for occurring to be discharged when nuclear fission in nuclear reactor.
S103: generated sedimentary energy when sample to be tested irradiates in nuclear reactor is calculated.
In the present embodiment, it after the energy released when obtaining each first nucleic and all decaying, can calculate
Sample to be tested irradiates the fission energy and sedimentary energy for occurring to be discharged when nuclear fission in nuclear reactor.
Specifically, calculate sample to be tested irradiates the fission energy for occurring to be discharged when nuclear fission in nuclear reactor, it can
With the following steps are included:
S2-1: the nucildic mass that nuclear fission occurs for sample to be tested irradiation is calculated.
Specifically, may include:
S2-1-1: sample to be tested is placed in nuclear reactor, and by the preset irradiation time of corresponding particle irradiation.
Above-mentioned particle can be the particles such as epithermal neutron, electronics, proton.In the present embodiment, above-mentioned particle is in superthermal
Son, the irradiation energy of the epithermal neutron are no more than 1MeV, thereby may be ensured that in sample to be tested uranium element (such as:238U) no
Nuclear chain reaction can occur.Wherein, above-mentioned irradiation time can be determined according to the nuclear decay time to be simulated.
S2-1-2: the quality after accurate weighing sample irradiation.
Wherein, the weighing accuracy of irradiated sample is not less than 10 μ g.
S2-1-3: accurate weighing irradiate a little after sample, acid is molten be processed into solution after, it is accurate measure sample irradiation after
The radionuclide content of nuclear fission occurs.
In one embodiment in this application, since uranium element is compared with other elements, core occurs under geological conditions
Energy variation is most obvious when decay, thus, selected measurement element is uranium element in this application, this most important by super
The element of nuclear fission can occur after thermal neutron bombardment.It is of course also possible to be other nucleic, the application is not construed as limiting this.
When with sour molten processing in S1-1 by the way of identical requirement, to the sample treatment after irradiation at solution, and measure
The nucleic of generation nuclear fission after sample irradiation, in this application the uranium element content as after sample irradiation.
S2-1-4: accurate to count according to the radionuclide content of the generation nuclear fission after the quality and sample irradiation after sample irradiation
The nucildic mass of nuclear fission occurs after calculation sample irradiation.
In one embodiment in this application, it can be contained according to the uranium after the quality and sample irradiation after sample irradiation
Amount, the uranium element quality m after accurately calculating sample irradiationU 2。
S2-1-5: will occur quality difference value of the nucleic of nuclear fission after predose, as the nucleic matter that nuclear fission occurs
Amount.
In one embodiment in this application, it can be split using quality difference value of the uranium element after predose as core occurs
The uranium element quality of change.That is, the uranium quality m of nuclear fission occursU 3=mU 1-mU 2, calculated mass unit is g, and accuracy should not be low
In 10-9g。
S2-2: according to the situation of change of sample energy before and after nucildic mass and generation nuclear fission, determine that sample to be tested exists
The fission energy discharged when nuclear fission occurs for irradiation in nuclear reactor.
Energy variation and mass-energy equation before and after nuclear fission can occur according to the nucleic that nuclear fission occurs, calculate sample
After being bombarded by epithermal neutron the released energy E2 of nuclear fission occurs for middle uranium atom.
In one embodiment in this application, the nucleic of above-mentioned generation nuclear fission is235U.Due to being lower than 1MeV by energy
Neutron bombardment after,238U can capture neutron but not fission, only235After absorbing neutron nuclear fission occurs for U, therefore after irradiation
In sample the reduction of uranium element quality both from235The fission of U.235There are many approach of fission by U, wherein more representational
It is after absorbing 1 neutron, fission generates141Ba and92Kr, and release 3 neutrons and energy.Reaction equation is235U+n→141Ba+92Therefore Kr+3n+ energy can calculate E according to formula once235 2:
E235 2=Δ mC2=mU 3/235.0439×(235.0439+1.0087-140.9139-91.8973-3×
1.0087)×10-3×2997924582=82325.8932 × 106×mU 3, unit is joule (J).Wherein, 235.0439 are235The molal weight of U, 140.9139 are141The molal weight of Ba, 91.8973 are92The molal weight of Kr, 1.0087 be neutron (n)
Molal weight, 10-3For gram to kilogram conversion coefficient.E235 2As E2.
Further, can according to exposure spots position of the physical property, sample to be tested of sample to be tested in nuclear reactor,
Irradiation time of the sample to be tested in nuclear reactor, nuclear reactor physical parameter when sample to be tested irradiates in nuclear reactor,
Simulation calculates generated sedimentary energy E3 when sample to be tested irradiates in nuclear reactor.
Optimal sedimentary energy in order to obtain, the physical property of above-mentioned sample to be tested can include but is not limited to it is following at least
One of: density (arrangement and composition situation including atom), volume, thickness and the weight of sample to be tested, exposure spots position tool
The grain that body can be radiation source the distance between to sample to be tested, when nuclear reactor physical parameter includes: radiation source and/or irradiation
Subcategory etc..
After having chosen above-mentioned parameter, sample to be tested can be calculated using Monte Carlo simulation and be irradiated in nuclear reactor
When generated sedimentary energy E3.
Nuclear reactor is a kind of device that artificial nuclear reaction can be realized with controlled manner.The side of energy is generated according to atomic nucleus
Nuclear reactor can be divided into fission reactor and two kinds of fusion reactor by formula.It is completed in the world today and widely used
Nuclear reactor is all fission reactor.Main nuclear process in fission reactor is the phase of neutron with nucleic various in nuclear reactor
Interaction.The energy source of nuclear reaction on the one hand from the sedimentary energy of irradiation neutron, on the other hand also from sample from
The fission energy of chain reaction release occurs after neutron bombardment for body heavy element.
Since the natural radionuclide in the earth's crust and deposit is more, but content is higher, and more main radioactivity
Nucleic is238U、235U、234U、232Th and40K etc..But content of these radionuclides in deposit has very big difference, partly declines
Phase is also respectively different from 2.47 × 105 years to 1.41 × 1010 year.In addition, under neutron bombardment, it may occur however that the core of nuclear fission
Element also includes238U、235U、232Th etc., but incident neutron energy threshold value needed for the generation nuclear fission of these nucleic is different, chain type core
The energy for reacting discharged also has very big difference.
In this application, using the time it is shorter can the nuclear fission completed of laboratory react and decline come the longer core of simulated time
Change process, and based on the sedimentary energy and fission energy that nuclear fission obtains, be calculated during neutron irradiation sample to be tested because
The heat of radioactivity genesis caused by neutron bombardment, when which is quantitatively calculated geology experienced to nuclear decay
Between.Nuclear decay is simulated in the way of the nuclear fission that the application is proposed, the purpose of laboratory simulation nuclear decay may be implemented, into
And the purpose that laboratory quantitatively calculates sample to be tested simulation nuclear decay Geologic Time experienced may be implemented.
S104: energy, the fission energy and the Energy Deposition released when all being decayed according to each first nucleic
Amount determines the first Geologic Time experienced during sample to be tested simulation nuclear decay.
It, can be according to each first nucleic in multiple first nucleic of radionuclide in one embodiment of the application
All decay discharged energy and fission energy, sedimentary energy, determines sample to be tested simulation nuclear decay first experienced
Geologic Time.Specifically, may comprise steps of；
S4-1: the ratio between energy that calculating simulation is released when decay energy and each first nucleic all decay
Value, obtains multiple simulation nuclear decay ratios corresponding with multiple first nucleic, wherein decay energy is nuclear fission energy for simulation
Amount with sedimentary energy and.
The disintegrating nucleus of the energy that E2+E3 is discharged as simulation nuclear decay, the ratio representative simulation of E2+E3/E1 produces
The ratio that energy is generated after raw energy and all decay, as in sample in multiple first nucleic each first nucleic simulation core
Decay ratio θ.
I.e., it is possible to according to238U、235U、234U、232Th、40E1:E corresponding to K238 1、E235 1、E234 1、E232 1、E40 1, respectively
Multiple simulation decay ratios corresponding with multiple first nucleic are calculated, θ is respectively as follows:238、θ235、θ234、θ232、θ40。
S4-2: several simulation nuclear decay ratios for meeting preset requirement in multiple simulation nuclear decay ratios are determined.
The preset requirement is each simulation nuclear decay ratio in multiple simulation nuclear decay ratios less than 1.When simulation nuclear decay
When ratio is greater than 1, the ratio value is meaningless, can reject.
S4-3: according to the simulation nuclear decay ratio for meeting preset requirement, sample to be tested simulation nuclear decay experienced is determined
First Geologic Time.
In one embodiment of the application, can be met with several preset requirement simulation nuclear decay ratio, several
It the half-life period for meeting the second nucleic corresponding to each simulation nuclear decay ratio in the simulation nuclear decay ratio of preset requirement, calculates
It obtains each second nucleic decay in several second nucleic and generates the second Geologic Time required when simulating decay energy；It will
Minimum value in several second Geologic Times is as sample to be tested the first Geologic Time of simulation nuclear decay experienced.
Each second nucleic decay in several second nucleic can be calculated according to following formula and generate to simulate and declined
Become the second Geologic Time required when energy:
Wherein, TiIndicate the decay of i-th second nucleic generate the simulation decay energy when required second geology when
Between, θiIndicate simulation nuclear decay ratio, T corresponding to i-th of second nucleic1/2Indicate the half-life period of i-th of second nucleic.
Similar with above-mentioned first nucleic and the second nucleic, the second Geologic Time and above-mentioned first Geologic Time herein is equal
Can indicate Geologic Time, be different calculated result to both distinguish, herein with the first Geologic Time and the second geology when
Between distinguish.
In one embodiment of the application, the molal weight of the second nucleic can use also to indicate above-mentioned expression formula:
Wherein, TkThe second nucleic decay generation that expression molal weight is k is described to simulate ground required when decay energy
Matter time, θkIndicate simulation nuclear decay ratio corresponding to the second nucleic of the molal weight for k,Indicate that molal weight is k's
The half-life period of second nucleic.
In one embodiment of the application,238Geologic Time needed for decay energy E2+E3 is simulated in U generation calculates public
Formula is t238=-ln (1- θ238)/ln2×4.51×109=-6.54 × ln (1- θ238)×109, unit is year.Wherein, ln2=
0.69,4.51 × 109Nian Wei238The half-life period of U, belong to constant.
In another embodiment of the application,235Geologic Time needed for decay energy E2+E3 is simulated in U generation calculates
Formula is t235=-ln (1- θ235)/ln2×7.00×108=-1.01 × ln (1- θ235)×109, unit is year.Wherein, 7.00
×108Nian Wei235The half-life period of U, belong to constant.
In another embodiment of the application,234Geologic Time needed for decay energy E2+E3 is simulated in U generation calculates
Formula is t234=-ln (1- θ234)/ln2×2.47×105=-3.58 × ln (1- θ234)×105, unit is year.Wherein, 2.47
×105Nian Wei234The half-life period of U, belong to constant.
In another embodiment of the application,232Geologic Time meter needed for decay energy E2+E3 is simulated in Th generation
Calculation formula is t232=-ln (1- θ232)/ln2×1.41×1010=-2.04 × ln (1- θ232)×1010, unit is year.Wherein,
1.41×1010Nian Wei232The half-life period of Th, belong to constant.
In another embodiment of the application,40Geologic Time needed for decay energy E2+E3 is simulated in K generation calculates
Formula is t40=-ln (1- θ40)/ln2×1.25×109=-1.81 × ln (1- θ) × 109, unit is year.Wherein, 1.25 ×
109Nian Wei40The half-life period of K, belong to constant.
After obtaining above-mentioned multiple second Geologic Times, t can be chosen238、t235、t234、t232、t40In minimum value make
For sample to be tested during nuclear decay the first Geologic Time experienced.
It, can during obtaining sample to be tested simulation nuclear decay using aforesaid way after the first Geologic Time experienced
To establish the relationship plate of the first Geologic Time of nuclear decay Yu sample hydrocarbon amount, laboratory data is extrapolated to according to relationship plate
Earth history period, so as to analyze test sample nuclear decay Geologic Time experienced, hydrocarbon amount and hydrocarbon potentiality.Into
One step, it can establish the correlation that nuclear decay history is formed with hydrocarbon history, product.Determine nuclear decay process to known core as a result,
The hydrocarbon contribution of decay Geologic Time hydrocarbon source rock.
It is specifically described, however is worth below with reference to determination method of the specific embodiment to above-mentioned Geologic Time
It is noted that the specific embodiment merely to the present invention is better described, does not constitute improper limitations of the present invention.
The present embodiment describes the nuclear decay Geologic Time experienced of determining kerogen sample.The present embodiment is used
Kerogen preparation from long 7 sections of the Ordos Basin Triassic system of rich organic shale, be derived from Shaanxi Province, the village Tang Nihe, Yijun County.
It can specifically include following steps:
S201: accurate weighing 0.15000g 74 μm of partial size or less and the kerogen sample to be irradiated that has mixed well.It uses
Ultrapure water of nitric acid, hydrofluoric acid and the resistivity of excellent pure grade not less than 18M Ω by after the molten processing of sample acid, through inductive coupling etc. from
Daughter mass spectrography, inductively coupled plasma spectrometry method measure the content of uranium, thorium, potassium in the solution respectively, and then calculate cheese
Content in root is respectively 11.723 μ g g-1、1.711μg g-1、1472.258μg g-1.Wherein blank control experiment display, nitre
Acid, the uranium of hydrofluoric acid and ultrapure water, thorium blank ion content be below 10-9g L-1, potassium blank ion content be lower than 10-6g
L-1。
S202: accurate weighing 1.00000g kerogen sample, according to the uranium, thorium, potassium content measured in step S201,
Calculate the element quality m of uranium, thorium, potassiumU 1、mTh 1、mK 1Respectively 11.723 μ g, 1.711 μ g, 1472.258 μ g.
S203: according to the situation of change and mass-energy equation of energy in the energy equation of radioactive isotope nuclear decay, and
In step S202 in obtained irradiation sample uranium, thorium, potassium element quality mU 1、mTh 1、mK 1, calculate that uranium, thorium, potassium is each naturally puts
Injectivity isotope is all after decay, the energy finally released.The energy that each nucleic is discharged after all decaying is respectively as follows:
E238 1=20749.5049 × 106×mU 1=2.432 × 105J,
E235 1=136.5272 × 106×mU 1=1.600 × 103J,
E234 1=0.9234 × 106×mU 1=10.825J,
E232 1=17670.0042 × 106×mTh 1=3.023 × 104J,
E40 1=0.3684 × 106×mK 1=542.380J.
S204: by kerogen sample in certain epithermal neutron (hole 49-2 light-water nuclear reactor D10 of Chinese Atomic Energy Research Institute
Road) in irradiation 3 hours, duct centre and average γ dosage are respectively 2.18 × 10 when full power6Gy/h and 1.80 ×
106Gy/h。
S205: the quality after accurate weighing sample irradiation is 0.99995g.
Sample after S206: accurate weighing 0.15000g irradiation is not low using the nitric acid, hydrofluoric acid and resistivity of excellent pure grade
In 18M Ω ultrapure water by the molten processing of sample acid after, content through inductively coupled plasma mass spectrometry measurement uranium in the solution,
And then the uranium content after calculating irradiation in kerogen is 11.711 μ g g-1.Wherein blank control experiment display, nitric acid, hydrofluoric acid
10 are below with the uranium of ultrapure water, the blank ion content of thorium-9gL-1, potassium blank ion content be lower than 10-6gL-1。
S207: according to sample obtained in the quality 0.99995g and step S206 after sample irradiation obtained in step S205
11.711 μ g g of uranium content after product irradiation-1, accurately calculate to obtain the uranium element quality m after sample irradiationU 2For 11.710 μ g.
S208: according to quality difference value of the uranium element after predose obtained in step S202 and step S207, hair is calculated
The uranium element quality m of raw nuclear fissionU 3=mU 1-mU 2=0.013 μ g.
S209:235Final fission products of the U after neutron bombardment are144Ba、89Kr and 2 neutron.According to mass-energy equation
With the uranium element quality of the generation nuclear fission after sample irradiation obtained in step S206, calculates uranium atom generation core in sample and split
Become released energy E2.E2=E235 2=82325.8932 × 106×mU 3=1070.225J.
S210: it according to sample physical property, locating exposure spots position, irradiation time and nuclear reactor physical parameter, utilizes
Monte Carlo simulation calculates sedimentary energy E3=5654.328J when sample irradiation.Specific calculating process continuous, Li Su referring to inscription on ancient bronze objects
" MCNP3B service manual " (revised edition in 1998, in the Institute of Computer application, China Atomic Energy Science Research Institute of Mei chief editor
Portion's data).
S211: using step S209 and the obtained energy of step S210 and (E2+E3=6724.553J) as simulating
Decay energy, released the energy ratio ((E2+ of the simulation each element whole decay that decay energy and step S203 have been obtained
E3)/E1) it is used as each radioisotopic simulation nuclear decay ratio θ.It is calculated according to step S203238U、235U、234U
、232Th、40E1 corresponding to K is respectively E238 1、E235 1、E234 1、E232 1、E40 1, calculate each radioisotopic simulation decay ratio
Example is respectively θ238=0.0277, θ235=4.2028, θ234=621.2058, θ232=0.2224, θ40=12.3982.Because of θ235、
θ234、θ40Greater than 1, it is not intended to which justice selects θ238And θ232Simulation nuclear decay Geologic Time is carried out to calculate.
S212: according to238U、232The radioactive atom half-life period T of Th1/2With simulation nuclear decay obtained in step S211
Ratio θ238、θ232, calculate238U、232Geologic Time needed for decay energy is simulated in Th decay generation is respectively as follows:
t238=-6.54 × ln (1- θ238)×109=1.83 × 108Year,
t232=-2.04 × ln (1- θ232)×1010=5.13 × 108Year,
Choose minimum value t therein238I.e. 1.83 hundred million years, nuclear decay Geologic Time was simulated as this.
Based on the same inventive concept, a kind of determining device of Geologic Time is additionally provided in the embodiment of the present invention, it is such as following
Embodiment described in.Since the principle that the determining device of Geologic Time solves the problems, such as is similar to the determination method of Geologic Time, because
The implementation of the determining device of this Geologic Time may refer to the implementation of the determination method of Geologic Time, and overlaps will not be repeated.
Used below, the combination of the software and/or hardware of predetermined function may be implemented in term " unit " or " module ".Although with
Device described in lower embodiment is preferably realized with software, but the combined realization of hardware or software and hardware
It may and be contemplated.Fig. 2 is a kind of structural block diagram of the determining device of the Geologic Time of the embodiment of the present invention, such as Fig. 2 institute
Show, may include: decay energy determining module 201, fission energy determining module 202, sedimentary energy determining module 203, geology
Time determining module 204 is below illustrated the structure.
Decay energy determining module 201 is determined for multiple first cores of the natural radionuclide of sample to be tested
The energy released when each first nucleic all decays in element；
Fission energy determining module 202, be determined for the sample to be tested irradiated in nuclear reactor occur core split
The fission energy discharged when change；
Sedimentary energy determining module 203 is determined for produced when the sample to be tested irradiates in nuclear reactor
Sedimentary energy；
Geologic Time determining module 204 can be used for being released when all being decayed according to each first nucleic
Energy, the fission energy and the sedimentary energy determine experienced the during sample to be tested simulation nuclear decay
One Geologic Time.
In one embodiment, the Geologic Time determining module includes: the first decay ratio-dependent unit, be can be used for
The ratio between the energy that simulation is released when decay energy and each first nucleic all decay is calculated separately, is obtained
To multiple simulation nuclear decay ratios corresponding with the multiple each first nucleic, wherein decay energy is for the simulation
The fission energy and the sedimentary energy and；Second decay ratio-dependent unit, is determined for out the multiple
Meet several simulation nuclear decay ratios of preset requirement in simulation nuclear decay ratio；Geologic Time computing unit, can be used for
Meet the simulation nuclear decay ratio of preset requirement according to described several, determines institute during the sample to be tested simulation nuclear decay
First Geologic Time of experience.
It, can be with automatic implementation geology using the embodiment of the determining device of Geologic Time provided by the various embodiments described above
The determination method of time, predicts Geologic Time, it may not be necessary to implement the specific participation of personnel, it can direct output ground
The prediction result of matter time, it is simple and quick, effectively increase user experience.
It should be noted that device described above can also include other embodiment party according to the description of embodiment of the method
Formula, concrete implementation mode are referred to the description of related method embodiment, do not repeat one by one herein.
It can be seen from the above description that the embodiment of the present invention realizes following technical effect: being based on nuclear reactor spoke
The process for generating nuclear fission according to sample to be tested and releasing energy, to simulate the nuclear decay process during earth history.Pass through
To during nuclear fission on sample to be tested sedimentary energy and fission energy accurately calculate, compare natural in sample to be tested
Radionuclide all decays the gross energy finally released, so that it is determined that out sample to be tested simulation nuclear decay geology experienced when
Between.The nuclear fission process time-consuming as employed in the application is short, it is easy to accomplish, it in the prior art can not be in reality to solve
It tests under the conditions of room and directly simulates effect of the nuclear decay process to organic matter hydrocarbon generation under geological conditions, can not also determine nuclear decay
The problem of process Geologic Time experienced.Further, the hydrocarbon potentiality of test sample are determined based on above-mentioned Geologic Time.
The application is not limited to be situation described in the embodiment of the present application.Certain professional standards use certainly
Definition mode or embodiment description practice processes on embodiment modified slightly also may be implemented above-described embodiment it is identical,
The implementation result being anticipated that after equivalent or close or deformation.Using these modifications or deformed data acquisition/calculating/judgement
The embodiment of equal acquisitions, still may belong within the scope of the optional embodiment of the application.
Although this application provides the method operating procedure as described in embodiment or flow chart, based on conventional or noninvasive
The means for the property made may include more or less operating procedure.The step of enumerating in embodiment sequence is only numerous steps
One of execution sequence mode, does not represent and unique executes sequence.It, can be with when device in practice or end product execute
It is executed according to embodiment or method shown in the drawings sequence or parallel executes (such as parallel processor or multiple threads
Environment, even distributed data processing environment).The terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, product or equipment including a series of elements are not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, product or equipment
Intrinsic element.In the absence of more restrictions, be not precluded include the process, method of the element, product or
There is also other identical or equivalent elements in person's equipment.
Unit, device or module that above-described embodiment illustrates etc. can specifically realize by computer chip or entity, or
It is realized by the product with certain function.For convenience of description, various modules point are divided into function when describing apparatus above
It does not describe.It certainly, when implementing the application can the function of each module is real in the same or multiple software and or hardware
It is existing, the module for realizing same function can also be realized by the combination of multiple submodule or subelement etc..Dress described above
Set that embodiment is only schematical, for example, the division of the unit, only a kind of logical function partition, in actual implementation
There may be another division manner, such as multiple units or components can be combined or can be integrated into another system or one
A little features can be ignored, or not execute.Another point, shown or discussed mutual coupling or direct-coupling or communication link
Connecing can be through some interfaces, the indirect coupling or communication connection of device or unit, can be electrical property, mechanical or other shapes
Formula.
It is also known in the art that other than realizing controller in a manner of pure computer readable program code, it is complete
Entirely can by by method and step carry out programming in logic come so that controller with logic gate, switch, specific integrated circuit, programmable
Logic controller realizes identical function with the form for being embedded in microcontroller etc..Therefore this controller is considered one kind
Hardware component, and the structure that the device for realizing various functions that its inside includes can also be considered as in hardware component.Or
Person even, can will be considered as realizing the device of various functions either the software module of implementation method can be hardware again
Structure in component.
The application can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Generally, program module includes routines performing specific tasks or implementing specific abstract data types, programs, objects, group
Part, data structure, class etc..The application can also be practiced in a distributed computing environment, in these distributed computing environments,
By executing task by the connected remote processing devices of communication network.In a distributed computing environment, program module can
To be located in the local and remote computer storage media including storage equipment.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It realizes by means of software and necessary general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, mobile terminal, server or the network equipment etc.) executes each embodiment of the application or implementation
Method described in certain parts of example.
Each embodiment in this specification is described in a progressive manner, the same or similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.The application can be used for crowd
In mostly general or special purpose computing system environments or configuration.Such as: personal computer, server computer, handheld device or
Portable device, laptop device, multicomputer system, microprocessor-based system, set top box, programmable electronics set
Standby, network PC, minicomputer, mainframe computer, distributed computing environment including any of the above system or equipment etc..
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Claims (8)
1. a kind of determination method of Geologic Time characterized by comprising
It determines and is discharged when each first nucleic all decays in multiple first nucleic of the natural radionuclide of sample to be tested
Energy out；
Determine that the sample to be tested irradiates the fission energy for occurring to be discharged when nuclear fission in nuclear reactor；
Determine generated sedimentary energy when the sample to be tested irradiates in nuclear reactor；
Energy, the fission energy and the Energy Deposition released when all being decayed according to each first nucleic
Amount determines the first Geologic Time experienced during the sample to be tested simulation nuclear decay；
Wherein, the energy that is released when all being decayed according to each first nucleic, the fission energy and described heavy
Product energy determines sample to be tested simulation nuclear decay first Geologic Time experienced, comprising:
Calculate separately the ratio between the energy that simulation is released when decay energy and each first nucleic all decay
Value, obtains multiple simulation nuclear decay ratios corresponding with the multiple first nucleic, wherein decay energy is for the simulation
The fission energy and the sedimentary energy and；
Determine several simulation nuclear decay ratios for meeting preset requirement in the multiple simulation nuclear decay ratio；
Meet the simulation nuclear decay ratio of preset requirement according to described several, determines the sample to be tested simulation nuclear decay process
In the first Geologic Time experienced；
Wherein, meet the simulation nuclear decay ratio of preset requirement according to described several, determine that the sample to be tested simulation core declines
First Geologic Time experienced during change, comprising:
According to described several meet the simulation nuclear decay ratio of preset requirement, described several meet the simulation core of preset requirement
The half-life period of the second nucleic corresponding to each simulation nuclear decay ratio, is calculated in several second nucleic in decay ratio
Each second nucleic decay generation is described to simulate the second Geologic Time required when decay energy；
Experienced the during minimum value in several second Geologic Times is simulated nuclear decay as the sample to be tested
One Geologic Time.
2. the method as described in claim 1, which is characterized in that the preset requirement is simulation nuclear decay ratio less than 1.
3. the method as described in claim 1, which is characterized in that be calculated in several second nucleic respectively according to following formula
A second nucleic decay generation is described to simulate the second Geologic Time required when decay energy:
Wherein, TiIt indicates that i-th of second nucleic decay generations are described and simulates the second Geologic Time required when decay energy, θi
Indicate simulation nuclear decay ratio, T corresponding to i-th of second nucleic1/2Indicate the half-life period of i-th of second nucleic.
4. the method as described in claim 1, which is characterized in that determine that the sample to be tested irradiates in nuclear reactor and core occurs
The fission energy discharged when fission, comprising:
Calculate the nucildic mass that nuclear fission occurs for the sample to be tested irradiation；
According to the situation of change of sample energy before and after the nucildic mass and generation nuclear fission, determine the sample to be tested in core
The fission energy discharged when nuclear fission occurs for irradiation in reactor.
5. the method as described in claim 1, which is characterized in that determine and produced when the sample to be tested irradiates in nuclear reactor
Raw sedimentary energy, comprising:
According to exposure spots position in nuclear reactor of the physical property of the sample to be tested, the sample to be tested, described to be measured
Irradiation time of the sample in nuclear reactor, the nuclear reactor physical parameter when sample to be tested irradiates in nuclear reactor,
Simulation determines generated sedimentary energy when the sample to be tested irradiates in nuclear reactor.
6. method as claimed in claim 5, which is characterized in that the physical property of the sample to be tested include it is following at least it
One: density, volume, thickness and the weight of the sample to be tested, the nuclear reactor physical parameter include: the particle kind of radiation source
Particle kind when class and/or irradiation.
7. the method as described in claim 1, which is characterized in that passed through during determining the sample to be tested simulation nuclear decay
After the first Geologic Time gone through, the method also includes:
According to first Geologic Time, the hydrocarbon potentiality of test sample are determined.
8. a kind of determining device of Geologic Time characterized by comprising
Decay energy determining module, for determine sample to be tested natural radionuclide multiple first nucleic in each first
The energy that nucleic is released when all decaying；
Fission energy determining module is discharged when irradiating generation nuclear fission in nuclear reactor for determining the sample to be tested
Fission energy；
Sedimentary energy determining module, generated sedimentary energy when for determining that the sample to be tested irradiates in nuclear reactor；
Geologic Time determining module, energy, the core released when for all being decayed according to each first nucleic
Fission energy and the sedimentary energy determine the first Geologic Time experienced during the sample to be tested simulation nuclear decay；
Wherein, the Geologic Time determining module includes:
First decay ratio-dependent unit, for calculating separately simulation, decay energy and each first nucleic all decay
When the energy that is released between ratio, obtain simulation nuclear decay ratio corresponding with the multiple first nucleic, wherein
The simulation decay energy be the fission energy and the sedimentary energy and；
Second decay ratio-dependent unit, meets the several of preset requirement in the multiple simulation nuclear decay ratio for determining
A simulation nuclear decay ratio；
Geologic Time computing unit, for meeting the simulation nuclear decay ratio of preset requirement according to described several, determine described in
Sample to be tested simulates the first Geologic Time experienced during nuclear decay；
Wherein, meet the simulation nuclear decay ratio of preset requirement according to described several, determine that the sample to be tested simulation core declines
First Geologic Time experienced during change, comprising:
According to described several meet the simulation nuclear decay ratio of preset requirement, described several meet the simulation core of preset requirement
The half-life period of the second nucleic corresponding to each simulation nuclear decay ratio, is calculated in several second nucleic in decay ratio
Each second nucleic decay generation is described to simulate the second Geologic Time required when decay energy；
Experienced the during minimum value in several second Geologic Times is simulated nuclear decay as the sample to be tested
One Geologic Time.
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