CN108168993B - A kind of method that kerogen extraction organic sulfur quantitatively excludes pyrite influence in the process - Google Patents
A kind of method that kerogen extraction organic sulfur quantitatively excludes pyrite influence in the process Download PDFInfo
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- CN108168993B CN108168993B CN201711337183.6A CN201711337183A CN108168993B CN 108168993 B CN108168993 B CN 108168993B CN 201711337183 A CN201711337183 A CN 201711337183A CN 108168993 B CN108168993 B CN 108168993B
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Abstract
The present invention, which provides a kind of kerogen and extracts the method for quantitatively excluding pyrite during organic sulfur and influencing, judges whether the kerogen needs to carry out pyrite removing processing including the mass percentage and preset threshold according to organic sulfur in kerogen total sulfur；Wherein, remaining pyrite is contained in the kerogen.This method can quickly and accurately judge the influence that element sulphur in remaining pyrite in kerogen currently whether is eliminated from the organic sulfur extracted in kerogen, to substantially increase the test accuracy of organic sulfur content and isotope in kerogen, accurate foundation is provided to restore the sulfur cycle of earth history period and rebuilding paleo-ocean environments.
Description
Technical field
Quantitative exclusion is yellow during extracting organic sulfur the present invention relates to organic sulfur extractive technique more particularly to a kind of kerogen
The method that iron ore influences, belongs to oil and gas geochemistry field technical field.
Background technique
Kerogen refers in sedimentary rock insoluble in alkali, the dispersed organic matter of Non-oxidized acid and non-polar organic solvent.
Petroleum and natural gas derives from depositional organic matter, for the hyle for generating petroleum and natural gas, with deposition
Based on dispersed organic matter in object (rock).Depositional organic matter in deposit (rock) experienced complicated biochemistry and chemistry and become
Change, kerogen is formed by sapropel and humification process.Kerogen is the main body of depositional organic matter, accounts for about total organic matter
80%-90%, research think that 80% or more petroleum hydrocarbon is that Cheesecake root is transformed.
Kerogenic ingredient and structure is complicated, is a kind of high molecular polymer, there is fixed chemical component, mainly by C,
H, O and a small amount of S, N composition, the molecular formula and structural model that do not fix.Durand etc. is to 440 kerogen samples all over the world
Elemental analysis the result shows that, average C, which accounts for 76.4%, H and accounts for 6.3%, O, accounts for 11.1%, and three accounts for 93.8% altogether, is kerogenic
Essential element ingredient.In kerogenic component, due to organic sulfur isotope in kerogen in thermal degradation process very
It is fractionated less, so the organic sulfur content and isotopics in kerogen are to restore earth history period sulfur cycle and again
One of the important evidence of paleo-ocean environments is built, and carries out oil gas-source rock comparison very strong evidence.
But it being influenced by the pyritic sulfur in kerogen with organic sulfur phase association, extracted organic sulfur is often impure,
Cause organic sulfur content higher, organic sulfur isotope is partially negative.The experimental method of pyrite in kerogen is sloughed at present more
Maturation, but whether there is no a kind of method that can remove with the pyritic sulfur in kerogen of the rational judgment by de- pyrite operation dry
Only.
Summary of the invention
The present invention provides a kind of method that kerogen extraction organic sulfur quantitatively excludes pyrite influence in the process, this method energy
It is enough quickly and accurately to judge currently whether eliminate in kerogen sulphur in remaining pyrite from the organic sulfur extracted in kerogen
The influence of element is gone through to substantially increase the test accuracy of organic sulfur content and isotope in kerogen to restore geology
History period sulfur cycle and reconstruction paleo-ocean environments provide accurate foundation.
The present invention provides a kind of method that kerogen extraction organic sulfur quantitatively excludes pyrite influence in the process, including basis
Mass percentage and preset threshold of the organic sulfur in kerogen total sulfur, judge whether the kerogen needs to carry out pyrite
Removing processing, wherein contain remaining pyrite in the kerogen.
That is, mass percentage and preset threshold according to organic sulfur in kerogen total sulfur, judge kerogen
Whether the element sulphur in middle remnants pyrite can impact the element sulphur extracted in kerogen.
If the element sulphur in kerogen in remaining pyrite can impact the element sulphur extracted in kerogen, also
It is to say, the pyrite residual volume in kerogen is excessive, need to carry out kerogen again to remove the experimental implementation of pyrite, thus
Enable the property and content that correctly reflect the organic sulfur in kerogen from the element sulphur extracted in kerogen；
If the element sulphur that the element sulphur in kerogen in remaining pyrite will not extract kerogen impacts, also
To say, the pyrite residual volume in kerogen be it is micro, without kerogen is carried out again removing pyrite experimental implementation, when
The preceding element sulphur from the extraction in kerogen can correctly reflect the property and content of organic sulfur in kerogen.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein institute
The mass percentage and preset threshold according to organic sulfur in kerogen total sulfur are stated, judges whether the kerogen needs to carry out
Pyrite removing processing, comprising:
If mass percentage of the organic sulfur in kerogen total sulfur is more than or equal to the preset threshold, the cheese
Root is not required to carry out pyrite removing processing；
If mass percentage of the organic sulfur in kerogen total sulfur is less than the preset threshold, the kerogen
Need to carry out pyrite removing processing.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein
According to mass percentage and preset threshold of the organic sulfur in kerogen total sulfur, judge whether the kerogen needs to carry out Huang
Before iron ore removing processing, further include in mass percentage according to total sulfur in kerogen and remaining pyrite element sulphur exist
Mass percentage in kerogen obtains mass percentage of the organic sulfur in kerogen total sulfur.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein institute
The mass percentage according to total sulfur in kerogen is stated to contain with quality percentage of the element sulphur in kerogen in remaining pyrite
Amount, obtains mass percentage of the organic sulfur in kerogen total sulfur, comprising: calculates the organic sulfur dry according to formula 1
Mass percentage in junket root total sulfur,
Sorg%=[(Stotal%-SPy%)/Stotal%] × 100% formula 1
Wherein, Sorg% is test mass percentage of the organic sulfur in kerogen total sulfur；Stotal% is total sulfur in cheese
Mass percentage in root；SPy% is mass percentage of the element sulphur in kerogen in remaining pyrite.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein obtains
Take mass percentage of the total element sulphur in kerogen, comprising:
Sulfuric acid solution is converted by the element sulphur in the kerogen, barium chloride solution is added in Xiang Suoshu sulfuric acid solution,
Precipitating；
According to the quality of the precipitating, mass percentage of the total sulfur in kerogen is obtained.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein institute
The quality according to the precipitating is stated, obtains mass percentage of the total element sulphur in kerogen, comprising: count according to formula 2
Mass percentage of the total sulfur in kerogen is calculated,
Stotal%=[(Ms×mBaSO4)/(MBaSO4×mk)] × 100% formula 2
Wherein, MsFor the molal weight of element sulphur, unit g/mol；mBaSO4For the quality of precipitating, unit g；MBaSO4For
The molal weight of barium sulfate, unit g/mol；mkFor kerogenic quality, unit g.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein institute
It states and converts sulfuric acid solution for the element sulphur in the kerogen, comprising:
The kerogen and deionized water are put into oxygen combustion bullet and fire oxidation, obtains kerogen solution；
The kerogen solution is diluted, bromine water is added, obtains the sulfuric acid solution.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein obtains
Take mass percentage of the element sulphur in kerogen in the remaining pyrite, comprising:
Detect the quality of iron ion in the sulfuric acid solution；
According to the quality of the iron ion, mass percentage of the remaining pyrite in kerogen is obtained；
According to mass percentage of the remaining pyrite in kerogen, element sulphur in the remaining pyrite is obtained
Mass percentage in kerogen.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein institute
The mass percentage according to the remaining pyrite in kerogen is stated, element sulphur is in cheese in the acquisition remaining pyrite
Mass percentage in root, comprising: quality percentage of the element sulphur in kerogen in the remaining pyrite is calculated according to formula 3
Content,
SPy%=Py% × 2MS/MPyFormula 3
Wherein, SPy% is mass percentage of the sulphur in kerogen in remaining pyrite；Py% is that remaining pyrite exists
Mass percentage in kerogen；MSFor the molal weight of element sulphur, unit g/mol；MPyFor the molal weight of pyrite,
Unit is g/mol.
A kind of kerogen as described above quantitatively excludes the method that pyrite influences during extracting organic sulfur, wherein institute
The quality according to the iron ion is stated, obtains mass percentage of the remaining pyrite in kerogen, comprising: according to formula
4 calculate mass percentage of the remaining pyrite in kerogen,
Py%=[(MPy×mFe)/(MFe×mk)] × 100% formula 4
Wherein, Py% is mass percentage of the remaining pyrite in kerogen；MPyIt is single for the molal weight of pyrite
Position is g/mol；mFeFor the quality of iron ion, unit g；mkFor kerogenic quality, unit g.
Implementation of the invention, at least has the advantage that
1, kerogen of the invention quantitatively excludes the method accuracy height that pyrite influences during extracting organic sulfur, can
The removal effect of the pyrite in current kerogen is objectively responded out, to judge whether also to need the remnants in kerogen
Pyrite is removed again；
2, it can be to restore ground that kerogen of the invention, which extracts the method that quantitatively exclusion pyrite influences during organic sulfur,
The sulfur cycle of matter period of history and reconstruction paleo-ocean environments provide important evidence；
3, kerogen of the invention extracts the method that quantitatively exclusion pyrite influences during organic sulfur also can be simultaneously
The very strong evidence that oil gas-source rock comparison provides；
4, it is easy to operate that the method that pyrite influences quantitatively is excluded during kerogen of the invention extraction organic sulfur, is not necessarily to
Large-scale experiment instrument is assisted, and executory cost is low, can extract the technical field of organic sulfur from kerogen suitable for various needs
In.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this hair
Technical solution in bright embodiment is clearly and completely described, it is clear that described embodiment is that a part of the invention is implemented
Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of labour.
Organic sulfur isotope in kerogen is seldom fractionated in thermal degradation process, therefore not only can use cheese
The content back of organic sulfur answers earth history period sulfur cycle and rebuilds paleo-ocean environments in root, additionally it is possible to using having in kerogen
The content of machine sulphur carries out the comparison of oil gas-source rock.
Due to containing element sulphur in pyrite, in order to avoid content of the element sulphur in pyrite to organic sulfur is done
It disturbs, therefore generally the operation of removing pyrite can be carried out to kerogen, to make to mention before extracting organic sulfur in kerogen
The mass percentage in kerogen of the organic sulfur taken can be more nearly the true standard value of organic sulfur in kerogen.
But the content of the pyrite in different kerogens is different, therefore it is yellow that removing is specifically carried out to each kerogen
It the removing degree of pyrite and is not known in the number and kerogen of iron ore operation, therefore, how to judge currently to remove yellow iron
Whether the number of mine operation can satisfy from the organic sulfur content extracted in kerogen really containing for close in kerogen organic sulfur
The demand of amount is the technical issues of oil and gas geochemistry field technical field is faced.
The present invention provides a kind of method that kerogen extraction organic sulfur quantitatively excludes pyrite influence in the process, according to organic
Mass percentage and preset threshold of the sulphur in kerogen total sulfur, judge whether kerogen needs to carry out at pyrite removing
Reason；Wherein, remaining pyrite is contained in kerogen.
Above-mentioned kerogen can be the kerogen without pyrite removing operation, be also possible to be executed Huang Tie
The kerogen of mine removing operation.
Above-mentioned judges whether kerogen needs to carry out pyrite removing to handle to be to judge to mention from current kerogen
The organic sulfur taken whether the influence by element sulphur in pyrite remaining in kerogen.
Mass percentage of the organic sulfur in kerogen total sulfur refers to a series of organic sulfur obtained by measuring and calculations
The mass percentage of total element sulphur in kerogen, wherein the total sulfur in kerogen refers to element sulphur all in kerogen,
Including the element sulphur in pyrite remaining in organic element sulphur and kerogen.
When above-mentioned organic sulfur the mass percentage in kerogen total sulfur closer to organic sulfur in kerogen total sulfur
Real quality percentage composition, it can be said that the purity of the bright organic sulfur extracted from the kerogen is higher, that is to say, that the cheese
The quality of remaining pyrite in root is fewer, that is, the kerogen no longer needs to carry out the operation of removing pyrite.
But real quality percentage composition of the organic sulfur in kerogen total sulfur is often unable to get, and therefore, can be set
Mass percentage of the organic sulfur in kerogen total sulfur is compared by one preset threshold with preset threshold, thus judge from
The purity of organic sulfur is extracted in kerogen, that is, judge whether also need to be performed the operation of removing pyrite in the kerogen.
Further, the mass percentage and preset threshold according to organic sulfur in kerogen total sulfur, judgement are dry
Whether junket root needs to carry out pyrite removing processing, comprising:
If mass percentage of the organic sulfur in kerogen total sulfur is more than or equal to preset threshold, kerogen is not required to carry out
Pyrite removing processing；
If mass percentage of the organic sulfur in kerogen total sulfur is less than preset threshold, kerogen needs to carry out yellow iron
Mine removing processing.
In order to exclude influence of the element sulphur to organic sulfur in kerogen in remaining pyrite, default threshold of the invention as far as possible
Value can be 92%.
Specifically, it is found by inventor's numerous studies, organic sulfur isotope value and symbiosis Huang iron in pure kerogen
Mass percentage difference between the sulfur isotope value of mine is usually no more than 12 ‰.When the test quality of organic sulfur in kerogen
When percentage composition is more than or equal to 92%, organic sulfur isotope test value is influenced in ± 1 ‰ range by the worst error of pyrite,
Slightly above test error ± 0.3 ‰.But this error can satisfy most of research requirement, because of kerogen and Huang Tie
The sulfur isotope value variation range of mine is typically larger than 20 ‰.Therefore, preset threshold is set to 92% by the present invention.
When the mass percentage and preset threshold according to organic sulfur in kerogen total sulfur, whether the kerogen is judged
Need to carry out pyrite removing processing, comprising:
If mass percentage of the organic sulfur in kerogen total sulfur is more than or equal to 92%, kerogen is not required to carry out yellow
Iron ore removing processing may determine that the element sulphur in kerogen in remaining pyrite will not cause shadow to the organic sulfur of extraction at this time
It rings, there is no need to carry out the operation of removing pyrite to kerogen again；
If mass percentage of the organic sulfur in kerogen total sulfur, less than 92%, it is de- that kerogen needs to carry out pyrite
Except processing, it may determine that the element sulphur in kerogen in remaining pyrite can impact the organic sulfur of extraction at this time, therefore
The operation for needing again to carry out kerogen removing pyrite, until test quality percentage of the organic sulfur in the total element sulphur of kerogen
Content is more than or equal to 92%.
The present invention does not limit the method for obtaining mass percentage of the organic sulfur in kerogen total sulfur, for example, can root
According to mass percentage of the element sulphur in kerogen in mass percentage of the total sulfur in kerogen and remaining pyrite, obtain
Take mass percentage of the organic sulfur in kerogen total sulfur.That is, calculating quality of the organic sulfur in kerogen total sulfur by formula 1
Percentage composition,
Sorg%=[(Stotal%-SPy%)/Stotal%] × 100% formula 1
Wherein, Sorg% is mass percentage of the organic sulfur in kerogen total sulfur；Stotal% is total sulfur in kerogen
Mass percentage；SPy% is mass percentage of the element sulphur in kerogen in remaining pyrite.
Quantified since element sulphur can be converted into barium sulfate precipitate, it in the present invention can be by the following method
Obtain mass percentage of total element sulphur in kerogen:
Sulfuric acid solution is converted by the element sulphur in kerogen to be measured, barium chloride solution is added into sulfuric acid solution, is precipitated；
According to the quality of precipitating, mass percentage of total element sulphur in kerogen is obtained.
Wherein it is possible to be that sulfuric acid solution will specifically be done by firing oxidizing process for the total sulfur cycling of elements in kerogen
Junket root and deionized water, which are put into oxygen combustion bullet, fires oxidation, obtains kerogen solution；After diluting kerogen solution to Vml,
Bromine water oxidation, obtains sulfuric acid solution.Wherein, the volume of deionized water is 5-10ml, and the pressure of pure oxygen is injected in oxygen combustion bullet
For 25atm.After firing among oxygen combustion bullet, the element sulphur in kerogen can be converted into sulfur dioxide and be dissolved in deionization
In water, kerogen solution, the i.e. mixed solution of sulfuric acid and sulfurous acid are generated.For convenience subsequent test operation, using go from
After sub- water dilutes kerogen solution, pure bromine water oxidation is added to make the sulfurous acid oxidase in kerogen solution and obtains sulfuric acid
Solution.At this point, the quality of the element sulphur in sulfuric acid solution is exactly the quality of the total element sulphur of kerogen.
By the way that excessive barium chloride solution is added into sulfuric acid solution, the sulfate ion in sulfuric acid solution is made to be converted into sulphur
Sour precipitated barium, at this point, the total element sulphur of kerogen is all converted into barium sulfate precipitate, therefore just by the quality of barium sulfate precipitate
Mass percentage of the total sulfur in kerogen can be obtained.
Specifically, mass percentage of the total sulfur in kerogen is calculated by formula 2,
Stotal%=[(Ms×mBaSO4)/(MBaSO4×mk)] × 100% formula 2
Wherein, MsFor the molal weight of element sulphur, g/mol；mBaSO4For the quality of precipitating, g；MBaSO4For mole of barium sulfate
Quality, g/mol；mkFor kerogenic quality, g.
The Computing Principle of above-mentioned formula 2 are as follows: the quality of kerogen total sulfur is equal to the quality of element sulphur in barium sulfate.
In addition, obtaining mass percentage of the element sulphur in kerogen in remaining pyrite, comprising:
Detect the quality of iron ion in sulfuric acid solution；
According to the quality of iron ion, mass percentage of the remaining pyrite in kerogen is obtained；
According to mass percentage of the remaining pyrite in kerogen, element sulphur is in kerogen in the remaining pyrite of acquisition
In mass percentage.
Since pyrite is ferrous disulfide, when carrying out kerogen to fire oxidation to be converted into sulfuric acid, cheese
The ferro element of pyrite in root can be converted into iron ion and be present in Vml sulfuric acid solution.At this point, iron ion in sulfuric acid solution
Quality can be obtained according to the product of the volume of the concentration and sulfuric acid solution of iron ion in sulfuric acid solution, wherein in sulfuric acid solution
The concentration of iron ion can be measured by atomic spetrophtometry method.
According to the quality of iron ion, mass percentage of the remaining pyrite in kerogen is obtained, comprising: according to formula 4
Mass percentage of the remaining pyrite in kerogen is calculated,
Py%=[(MPy×mFe)/(MFe×mk)] × 100% formula 4
Wherein, Py% is mass percentage of the remaining pyrite in kerogen；MPyIt is single for the molal weight of pyrite
Position is g/mol；mFeFor the quality of iron ion, unit g；mkFor kerogenic quality, g.
According to mass percentage of the remaining pyrite in kerogen, element sulphur is in kerogen in the remaining pyrite of acquisition
In mass percentage, comprising: mass percentage of the element sulphur in kerogen in remaining pyrite is calculated according to formula 3,
SPy%=Py% × 2MS/MPyFormula 3
Wherein, SPy% is mass percentage of the element sulphur in kerogen in remaining pyrite；Py% is remaining yellow iron
Mass percentage of the mine in kerogen；MSFor the molal weight of element sulphur, g/mol；MPyFor the molal weight of pyrite, g/
mol。
Whether the present invention can quickly and accurately judge current kerogen by simple test operation and mathematical computations
Need to continue to execute the operation for being removed pyrite, so that good base has been established in the high-purity extraction for organic sulfur in kerogen
Plinth effectively avoids the interference that the element sulphur of remaining pyrite in kerogen determines the quality of the organic sulfur of extraction.
Hereinafter, quantitatively excluding pyrite during extracting organic sulfur by the embodiment kerogen that the present invention will be described in detail
The method of influence.
Embodiment
1, the conversion of the total element sulphur of kerogen
Kerogen to be measured is weighed, m is denoted ask。
Kerogen to be measured and 8ml deionized water are put into the oxygen combustion bullet of Parr company production, in oxygen combustion bullet
The pressure for injecting pure oxygen is 25atm, and after detonation oxidation, the sulfur dioxide of generation is dissolved in generation kerogen solution in deionized water；
After kerogen solution is diluted to Vml (V=200) using deionized water, pure bromine water is added into kerogen solution,
Generate sulfuric acid solution.
2, in remaining pyrite mass percentage of the element sulphur in kerogen calculating
It takes the above-mentioned sulfuric acid solution of 5ml to detect the concentration of wherein iron ion using Atomic Absorption Spectrometer, is denoted as CFe(ppm)。
The quality of iron ion in sulfuric acid solution is calculated using formula 5:
mFe=CFe×V×10-6Formula 5
Wherein, mFeFor the quality of iron ion in sulfuric acid solution, g；CFeFor the concentration of iron ion in sulfuric acid solution, ppm；V is
The volume of sulfuric acid solution, ml.
Mass percentage of the remaining pyrite in the kerogen is calculated using formula 4,
Py%=[(MPy×mFe)/(MFe×mk)] × 100% formula 4
Wherein, Py% is mass percentage of the remaining pyrite in kerogen；MPyIt is single for the molal weight of pyrite
Position is g/mol；mFeFor the quality of iron ion, unit g；mkFor kerogenic quality, g.
Mass percentage of the element sulphur in kerogen in remaining pyrite is calculated using formula 3,
SPy%=Py% × 2MS/MPyFormula 3
Wherein, SPy% is mass percentage of the element sulphur in kerogen in remaining pyrite；Py% is remaining yellow iron
Mass percentage of the mine in kerogen；MSFor the molal weight of element sulphur, g/mol；MPyFor the molal weight of pyrite, g/
mol。
3, the calculating of mass percentage of the total sulfur in kerogen
The barium chloride solution that excessive (20ml) concentration is 10% is added into above-mentioned sulfuric acid solution, precipitates, filtering will sink
It after shallow lake is washed with deionized, dries, weighing is denoted as mBaSO4。
Mass percentage of the total sulfur in kerogen is calculated using formula 2:
Stotal%=[(Ms×mBaSO4)/(MBaSO4×mk)] × 100% formula 2
Wherein, Stotal% is mass percentage of the total sulfur in kerogen；MsFor the molal weight of element sulphur, g/mol；
mBaSO4For the quality of precipitating, g；MBaSO4For the molal weight of barium sulfate, g/mol；mkFor kerogenic quality, g.
4, the calculating of mass percentage of the organic sulfur in kerogen total sulfur
Mass percentage of the organic sulfur in kerogen total sulfur is calculated using formula 1:
Sorg%=[(Stotal%-SPy%)/Stotal%] × 100% formula 1
Wherein, Sorg% is mass percentage of the organic sulfur in kerogen total sulfur；Stotal% is total sulfur in kerogen
Mass percentage；SPy% is mass percentage of the element sulphur in kerogen in remaining pyrite.
If the 5, S of above-mentioned calculatingorg% is more than or equal to 92%, then the kerogen no longer needs to carry out pyrite removing processing；
If the S of above-mentioned calculatingorg% is less than 92%, then the kerogen needs to carry out pyrite removing processing again.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (6)
1. a kind of kerogen quantitatively excludes the method that pyrite influences during extracting organic sulfur, which is characterized in that including basis
Mass percentage and preset threshold of the organic sulfur in kerogen total sulfur, judge whether the kerogen needs to carry out pyrite
Removing processing；Wherein, remaining pyrite is contained in the kerogen；
The mass percentage and preset threshold according to organic sulfur in kerogen total sulfur, judges whether the kerogen needs
Carry out pyrite removing processing, comprising:
If mass percentage of the organic sulfur in kerogen total sulfur is more than or equal to the preset threshold, the kerogen
It is not required to carry out pyrite removing processing；
If mass percentage of the organic sulfur in kerogen total sulfur is less than the preset threshold, the kerogen needs
Carry out pyrite removing processing；
In the mass percentage and preset threshold according to organic sulfur in kerogen total sulfur, judge whether the kerogen needs
It further include sulphur in the mass percentage and remaining pyrite according to total sulfur in kerogen before carrying out pyrite removing processing
Mass percentage of the element in kerogen obtains mass percentage of the organic sulfur in kerogen total sulfur；
Obtain mass percentage of the total sulfur in kerogen, comprising:
Sulfuric acid solution is converted by the element sulphur in the kerogen, barium chloride solution is added in Xiang Suoshu sulfuric acid solution, is precipitated；
According to the quality of the precipitating, mass percentage of the total sulfur in kerogen is obtained；
Obtain mass percentage of the element sulphur in kerogen in the remaining pyrite, comprising:
The concentration of iron ion in the sulfuric acid solution is detected according to atomic spetrophtometry method；
According to the volume of the concentration of the iron ion and the sulfuric acid solution, the quality of the iron ion is obtained；
According to the quality of the iron ion, mass percentage of the remaining pyrite in kerogen is obtained；
According to mass percentage of the remaining pyrite in kerogen, obtains element sulphur in the remaining pyrite and doing
Mass percentage in junket root；
The preset threshold is 92%.
2. the method according to claim 1, wherein the mass percentage according to total sulfur in kerogen
With mass percentage of the element sulphur in kerogen in remaining pyrite, matter of the organic sulfur in kerogen total sulfur is obtained
Measure percentage composition, comprising: mass percentage of the organic sulfur in kerogen total sulfur is calculated according to formula 1,
Sorg%=[(Stotal%-SPy%)/Stotal%] × 100% formula 1
Wherein, Sorg% is test mass percentage of the organic sulfur in kerogen total sulfur；Stotal% is total sulfur in kerogen
Mass percentage；SPy% is mass percentage of the element sulphur in kerogen in remaining pyrite.
3. the method according to claim 1, wherein the quality according to the precipitating, obtains the total sulfur
Mass percentage in kerogen, comprising: mass percentage of the total sulfur in kerogen is calculated according to formula 2,
Stotal%=[(Ms×mBaSO4)/(MBaSO4×mk)] × 100% formula 2
Wherein, MsFor the molal weight of element sulphur, unit g/mol；mBaSO4For the quality of precipitating, unit g；MBaSO4For sulfuric acid
The molal weight of barium, unit g/mol；mkFor kerogenic quality, unit g.
4. according to the method described in claim 3, it is characterized in that, the element sulphur by the kerogen is converted into sulfuric acid
Solution, comprising:
The kerogen and deionized water are put into oxygen combustion bullet and fire oxidation, obtains kerogen solution；It dilutes described dry
Junket root solution is added bromine water, obtains the sulfuric acid solution.
5. the method according to claim 1, wherein the matter according to the remaining pyrite in kerogen
Percentage composition is measured, obtains mass percentage of the element sulphur in kerogen in the remaining pyrite, comprising: count according to formula 3
Mass percentage of the element sulphur in kerogen in the remaining pyrite is calculated,
SPy%=Py% × 2MS/MPyFormula 3
Wherein, SPy% is mass percentage of the element sulphur in kerogen in remaining pyrite；Py% is that remaining pyrite exists
Mass percentage in kerogen；MSFor the molal weight of element sulphur, unit g/mol；MPyFor the molal weight of pyrite,
Unit is g/mol.
6. according to the method described in claim 5, it is characterized in that, the quality according to the iron ion, obtains described residual
Mass percentage of the remaining pyrite in kerogen, comprising: matter of the remaining pyrite in kerogen is calculated according to formula 4
Percentage composition is measured,
Py%=[(MPy×mFe)/(MFe×mk)] × 100% formula 4
Wherein, Py% is mass percentage of the remaining pyrite in kerogen；MPyFor the molal weight of pyrite, unit is
g/mol；mFeFor the quality of iron ion, unit g；mkFor kerogenic quality, unit g.
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