CN106841004A - Shale preserves capacity judging method - Google Patents
Shale preserves capacity judging method Download PDFInfo
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- CN106841004A CN106841004A CN201710061005.9A CN201710061005A CN106841004A CN 106841004 A CN106841004 A CN 106841004A CN 201710061005 A CN201710061005 A CN 201710061005A CN 106841004 A CN106841004 A CN 106841004A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 229910052683 pyrite Inorganic materials 0.000 claims description 84
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 75
- 239000011028 pyrite Substances 0.000 claims description 75
- 229910021532 Calcite Inorganic materials 0.000 claims description 74
- 238000011156 evaluation Methods 0.000 claims description 32
- 238000003860 storage Methods 0.000 claims description 28
- 239000011435 rock Substances 0.000 claims description 16
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 229910052960 marcasite Inorganic materials 0.000 claims description 9
- 239000011575 calcium Substances 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 229940095991 ferrous disulfide Drugs 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 19
- 239000011148 porous material Substances 0.000 description 72
- 239000005416 organic matter Substances 0.000 description 20
- 239000007789 gas Substances 0.000 description 16
- 238000004458 analytical method Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010219 correlation analysis Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- RNAMYOYQYRYFQY-UHFFFAOYSA-N 2-(4,4-difluoropiperidin-1-yl)-6-methoxy-n-(1-propan-2-ylpiperidin-4-yl)-7-(3-pyrrolidin-1-ylpropoxy)quinazolin-4-amine Chemical compound N1=C(N2CCC(F)(F)CC2)N=C2C=C(OCCCN3CCCC3)C(OC)=CC2=C1NC1CCN(C(C)C)CC1 RNAMYOYQYRYFQY-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention provides a kind of shale and preserves capacity judging method, including：Determine every piece of mineralogical composition content of sample and this every piece total organic carbon TOC content of sample at least one piece sample of shale；What the TOC contents according to this every piece mineralogical composition content of sample and this every piece sample determined the shale preserves ability.The shale that the present invention is provided preserves capacity judging method, effectively reduces the experiment difficulty for determining that shale preserves ability, simplifies experimental implementation.
Description
Technical field
Capacity judging method is preserved the invention belongs to oil-gas exploration and development technical field, more particularly to a kind of shale.
Background technology
Shale gas as one of unconventional petroleum resources, in order to effectively be developed to shale gas, need to be right before exploitation
The ability of preserving of shale is evaluated, and to determine the ability of preserving of shale, and then can be filtered out the more block of shale gas and is carried out
Exploitation.
Prior art is mainly preserves ability by microcosmos experiment method test shale, such as by isothermal nitrogen adsorption
Experiment, carbon dioxide adsorption isotherm experiment etc., measure the pore specific surface area and pore volume of shale samples, carry out shale pore structure
Full quantification characterize, and then determine that rock stratum preserves ability., it is necessary to be pre-processed to shale samples before measurement, first
Shale samples are ground to default sieve mesh, being then passed through inert gas under preset temperature is processed, to remove shale samples
In aqueous vapor etc..In above-mentioned adsorption isotherm experiment process, experimental temperature, pressure, water saturation etc. there are certain requirements, and
And the operating procedure of experiment is very cumbersome.
Above-mentioned microcosmos experiment method is higher to sample requirement, and experiment difficulty is big, and operating difficulties is unfavorable for entering a large amount of samples
Row detection.
The content of the invention
The present invention provides a kind of shale and preserves capacity judging method, to reduce the experiment difficulty for determining that shale preserves ability,
Simplify experimental implementation.
The shale that the present invention is provided preserves capacity judging method, including：
Determine at least one piece sample of shale every piece of sample mineralogical composition content and every piece of sample it is total organic
Carbon TOC contents；
The TOC contents of mineralogical composition content and every piece of sample according to every piece of sample determine the storage of the shale
Collection ability.
Further, the weight/mass percentage composition of the mineralogical composition content of every piece of sample including pyrite and calcite
Weight/mass percentage composition.
Further, it is described true according to the mineralogical composition content of every piece of sample and the TOC contents of every piece of sample
Determine the ability of preserving of the shale, including：
The maximum of TOC contents, determines TOC in TOC contents and at least one piece sample according to every piece of sample
Evaluating；
The matter of pyrite in the weight/mass percentage composition of the pyrite according to every piece of sample and at least one piece sample
The maximum of percentage composition is measured, pyrite evaluating is determined；
The matter of calcite in the weight/mass percentage composition of the calcite according to every piece of sample and at least one piece sample
The maximum of percentage composition is measured, calcite evaluating is determined；
According to the TOC evaluatings, the pyrite evaluating, and the calcite evaluating, it is determined that described
The storage evaluation parameter of rock stratum；The storage evaluation parameter of the rock stratum is bigger, the rock stratum to preserve ability stronger.
Further, it is described according to the TOC evaluatings, the pyrite evaluating, and the calcite evaluation
Parameter, determines the storage evaluation parameter of the rock stratum, including：
RC=a*RTOC+b*RCa+c*RFeS2
Wherein, RTOCIt is the TOC evaluatings, RFeS2It is the pyrite evaluating, RCaIt is the calcite evaluation
Parameter；RCIt is the storage evaluation parameter of shale；A, b, c are preset value.
Further, TOC contents are most in the TOC contents and at least one piece sample according to every piece of sample
Big value, determines TOC evaluatings, including：
The ratio of the maximum of TOC contents in TOC contents and at least one piece sample according to every piece of sample, really
The fixed TOC evaluatings.
Further, the weight/mass percentage composition of the pyrite according to every piece of sample and at least one piece sample
The maximum of the weight/mass percentage composition of middle pyrite, determines pyrite evaluating, including：
The matter of pyrite in the weight/mass percentage composition of the pyrite according to every piece of sample and at least one piece sample
The ratio of the maximum of percentage composition is measured, the pyrite evaluating is determined.
Further, the weight/mass percentage composition of the calcite according to every piece of sample and at least one piece sample
The maximum of the weight/mass percentage composition of middle calcite, determines calcite evaluating, including：
It is determined that the maximum of the weight/mass percentage composition of calcite and the side of every piece of sample at least one piece sample
The difference of the weight/mass percentage composition of Xie Shi；
According to the difference and the ratio of the weight/mass percentage composition of the calcite of every piece of sample, the calcite is determined
Evaluating.
Further, the pyrite includes：Ferrous disulfide；The calcite includes：Calcium carbonate.
The present invention provides a kind of shale and preserves capacity judging method, including：Determine every piece at least one piece sample of shale
The mineralogical composition content of sample and this every piece TOC content of sample；According to this every piece mineralogical composition content of sample and this every piece
What the TOC contents of sample determined the shale preserves ability.The shale that the present invention is provided preserves capacity judging method, effectively reduces
Determine that shale preserves the experiment difficulty of ability, simplify experimental implementation.
Brief description of the drawings
Fig. 1 preserves the flow chart of capacity judging method for the shale for providing of the invention；
Fig. 2 is that the present invention determines the shale according to the TOC of this every piece mineralogical composition content of sample and this every piece sample
Preserve the method flow diagram of ability；
Fig. 3 preserves the flow chart of the determination method of ability for another shale for providing of the invention.
Specific embodiment
The present invention provides a kind of shale and preserves capacity judging method, and Fig. 1 preserves ability determination for the shale that the present invention is provided
The flow chart of method.As shown in figure 1, the method may include：
S101, the mineralogical composition content for determining at least one piece sample of shale every piece of sample and this every piece sample always have
Machine carbon (Total Organic Carbon, abbreviation TOC) content.
Specifically, can be that X-ray diffraction analysis and rock pyrolysis experiment are carried out to every piece of sample in the S101, to determine
This every piece mineralogical composition content of sample and this every piece TOC content of sample.
At least one piece sample can be the polylith shale samples in the shale reservoir to be measured of collection.
The TOC contents of S102, the mineralogical composition content according to this every piece sample and this every piece sample determine the storage of the shale
Collection ability.
Specifically, TOC that can be first according to this every piece mineralogical composition content of sample and this every piece sample in the S102 contains
That measures this every piece shale samples of determination preserves ability, then determines at least one piece average value for preserving ability of sample, and this is at least
What the average value for preserving ability of one piece of sample can be used to characterizing the shale preserves ability.
Wherein, the pore volume and pore specific surface area of shale determine the ability of preserving of shale, in practical application, can be by nitrogen
Gas adsorption isotherm experiment measures the pore volume and pore specific surface area of shale samples, and carries out constituent analysis to shale samples, and
The correlation of the composition of the pore volume, pore specific surface area and shale samples of shale samples is analyzed, is drawn：In shale components, this is every
The mineralogical composition content of block sample and this every piece TOC content of sample, are in different from the pore volume and pore specific surface area of shale
Dependency relation.Thus the mineralogical composition content for preserving ability and this every piece sample and this every piece sample of the shale be can determine that
TOC contents are related, and then can determine the shale by the TOC contents of this every piece mineralogical composition content of sample and this every piece sample
Preserve ability.
Correlation analysis result shows that TOC contents and the shale pore volume and pore specific surface area of shale are in absolute positive
Pass relation.This is because shale is during thermal evolution, because the organic matter hole that hydro carbon-generation is produced is present in remaining organic matter
In, the organic matter hole aperture is big, connective good so that the pore volume and pore specific surface area of shale accordingly increase.And it is remaining organic
Matter content is embodied by TOC contents, and TOC contents are higher, then the remaining content of organic matter is higher, and organic matter hole is more, shale
Pore volume and pore specific surface area it is bigger.And pore volume or pore specific surface area of the mineralogical composition content also to shale are related,
And different mineralogical composition in shale, its content is different from the pore volume of shale or the correlation of pore specific surface area.
The present invention provides a kind of shale and preserves capacity judging method, including：Determine every piece at least one piece sample of shale
The mineralogical composition content of sample and this every piece total organic carbon TOC content of sample；According to this every piece mineralogical composition content of sample
Ability is preserved with the TOC contents of this every piece sample determine the shale.The shale that the present invention is provided is preserved in capacity judging method,
Isothermal nitrogen adsorption experiment need not be carried out, the experiment difficulty for determining that shale preserves ability, and experimental implementation is effectively reduced.
In capacity judging method being preserved due to the shale, without carrying out gas adsorption isotherm experiment, therefore, the shale is preserved
Capacity judging method can determine that the shale preserves ability by macroscopic view experiment.
Further, this every piece mineralogical composition content of sample includes the weight/mass percentage composition of pyrite and the matter of calcite
Amount percentage composition.
Specifically, pore volume and pore specific surface area by measuring shale samples, and shale samples are carried out mineral into
Analysis, it may be determined that pyrite is coupled relation with organic matter, and generally organic matter association, page are had around pyrite in shale
Pyrite content is more in rock, and the content of organic matter is also higher in reflecting shale, and organic matter hole is more, the pore volume of shale and
Pore specific surface area is bigger so that shale preserves that ability is stronger, and the possibility that shale gas are present is higher.
However, by measuring the pore volume and pore specific surface area of shale samples, and mineralogical composition is carried out to shale samples
Analysis, calcite content is higher, and the pore volume and pore specific surface area of shale are smaller, and this is because the secondary action of calcite is caused
So that shale preserves reduced capability, so that the possibility that shale gas are present is lower.
Further, Fig. 2 is the present invention according to this every piece mineralogical composition content of sample and the TOC contents of this every piece sample
Determine the method flow diagram for preserving ability of the shale.As shown in Fig. 2 according to this every piece ore deposit of sample in S102 as implied above
What the TOC contents of thing component content and this every piece sample determined the shale preserves ability, it may include：
S201, the maximum according to TOC contents in the TOC contents and at least one piece sample of this every piece sample, determine TOC
Evaluating.
Specifically, TOC evaluatings are between 0~1, the value of TOC evaluatings is bigger, and shale to be measured preserves ability
Stronger, the possibility containing shale gas is higher in shale to be measured.
Wherein, the pore volume and pore specific surface area of shale determine the ability of preserving of shale, the pore volume and boring ratio of shale
Surface area is bigger, shale to preserve ability stronger；And the TOC contents of shale are in positive with the pore volume and pore specific surface area of shale
Close.
This is because shale is during thermal evolution, because the organic matter hole that hydro carbon-generation is produced is present in remaining organic matter
In, the organic matter hole aperture is big, connective good so that the pore volume and pore specific surface area of shale accordingly increase.And it is remaining organic
Matter content is embodied by TOC contents, and TOC contents are higher, and the remaining content of organic matter is higher, and organic matter hole is more, shale
Pore volume and pore specific surface area are bigger, and shale preserves that ability is stronger, and the possibility that shale gas are present is higher.
S202, the matter according to pyrite in this every piece weight/mass percentage composition and at least one piece sample of the pyrite of sample
The maximum of percentage composition is measured, pyrite evaluating is determined.
Specifically, pyrite evaluating is between 0~1, the value of pyrite evaluating is bigger, the storage of shale to be measured
Collection ability is stronger, and the possibility containing shale gas is higher in shale to be measured.
Wherein, pyrite and organic matter are coupled relation, and generally organic matter association, page are had around pyrite in shale
Pyrite content is more in rock, and the content of organic matter is also higher in reflecting shale, and organic matter hole is more, the pore volume of shale and
Pore specific surface area is bigger so that shale preserves that ability is stronger, and the possibility that shale gas are present is higher.
S203, the matter according to calcite in this every piece weight/mass percentage composition and at least one piece sample of the calcite of sample
The maximum of percentage composition is measured, calcite evaluating is determined.
Specifically, calcite evaluating is between 0~1, the value of calcite evaluating is bigger, shale to be measured
Preserve that ability is stronger, the possibility containing shale gas is higher in shale to be measured.
Wherein, secondary calcite can block the hole in shale, and calcite content is higher, the pore volume and boring ratio of shale
Surface area is smaller so that shale preserves that ability is weaker, and the possibility that shale gas are present is lower.
S204, according to the TOC evaluatings, the pyrite evaluating, and the calcite evaluating, determine this every piece
The storage evaluation parameter of sample.
Specifically, the storage evaluation parameter of the shale is between 0~1, the storage evaluation parameter of the rock stratum
Bigger, the rock stratum preserves that ability is stronger, and the possibility containing shale gas is higher in shale to be measured.
Wherein, as above S204 can first according to the TOC evaluatings, the pyrite evaluating, and calcite evaluation ginseng
Number determines this every piece storage evaluation parameter of sample, then determines the flat of at least one piece storage evaluation parameter of sample
Average, the average value of at least one piece storage evaluation parameter of sample is the storage evaluation parameter of the shale.
Further, this is according to the TOC evaluatings, the pyrite evaluating, and the calcite evaluating, it is determined that
This every piece storage evaluation parameter of shale, including：
RC=a*RTOC+b*RCa+c*RFeS2(formula 1)
Wherein, RTOCIt is the TOC evaluatings, RFeS2It is the pyrite evaluating, RCaIt is the calcite evaluating；
RCIt is the storage evaluation parameter of shale；A, b, c are preset value.
Specifically, a is the corresponding weight coefficient of TOC Content evaluation parameters, reflects TOC contents and ability is preserved to shale
Influence degree.Wherein, a is to carry out correlation, conspicuousness by the pore volume and pore specific surface area to shale TOC contents and shale
What analysis was obtained, a for example can be 0.7.
B is the corresponding weight coefficient of pyrite evaluating, reflects the influence that pyrite content preserves ability to shale
Degree.Wherein, b be by the pore volume and pore specific surface area to pyrite content in shale and shale carry out correlation, significantly
Property analysis obtain, b for example can be 0.1.
C is the corresponding weight coefficient of calcite evaluating, reflects the influence that calcite content preserves ability to shale
Degree.Wherein, c be by the pore volume and pore specific surface area to calcite content in shale and shale carry out correlation, significantly
Property analysis obtain, c for example can be 0.2.
Specifically, the preset value of a for example can be by TOC in every piece of sample and pore volume and the phase of pore specific surface area
The analysis of closing property is obtained, and the preset value of b for example can be by pyrite in every piece of sample and pore volume and pore specific surface area
Correlation analysis are obtained, and the preset value of c for example can be by calcite in every piece of sample and pore volume and pore specific surface area
Correlation analysis obtain.Specific analysis process can be as follows：
Determine this every piece pore volume and pore specific surface area of sample in shale samples, and this every piece mineralogical composition of sample
Content and this every piece TOC content of sample.Detailed data is as shown in table 1.
Table 1
Wherein, BJH pore volumes refer to the experimental result obtained using isothermal nitrogen adsorption experiment, are calculated by BJH models
Out shale pore volume.BJH models are the pore-size distribution models based on Kelvin capillary condensation theoretical developments, by Barrett,
Joyner and Halenda are described jointly.
BET pore specific surface areas refer to the experimental result obtained using isothermal nitrogen adsorption experiment, are calculated by BET models
Carry out shale pore specific surface area.BET theories are by S.Brunauer (Bruneel), P.Emmett (Ai Mite) and E.Teller
The BET adsorption theory of multimolecular layers that (Teller) was proposed in 1938, and BET models are developed on this basis, can be used to calculate
Pore specific surface area in gas absorption experimentation.
Determine this every piece correlation of the composition of the pore volume of sample, pore specific surface area and shale samples in shale samples,
Including：
Wherein, r is coefficient correlation；WithRespectively variable x, the average value of y；xiAnd yiIt is respectively i-th of variable x, y
Observation.
Using above-mentioned formula 5, the pore volume and pore specific surface area of this every piece sample shown in table 2, and this every piece are can obtain
Relevance parameter between the mineralogical composition content of sample and this every piece TOC content of sample.Detailed data is as shown in table 2.
Table 2
Drawn by the correlation analysis result of table 2：In shale components, the weight/mass percentage composition of the pyrite of the shale, the page
The weight/mass percentage composition of the calcite of rock, and the shale TOC contents, pore volume and the pore specific surface area degree of correlation with shale
It is high.
Wherein, a is used as the corresponding weight coefficient of TOC Content evaluation parameters, due to the TOC contents of the shale, with the shale
Pore volume and pore specific surface area degree of correlation highest, in conjunction with actual geological analysis, the preset value of a for example can be 0.7,
0.75 or 0.8.
B as the corresponding weight coefficient of pyrite evaluating, due to the weight/mass percentage composition of the pyrite of the shale, with
The pore volume of the shale and the degree of correlation of pore specific surface area are higher, and in conjunction with actual geological analysis, the preset value of b for example can be with
It is 0.1,0.08 or 0.05.
C as the corresponding weight coefficient of calcite evaluating, due to the weight/mass percentage composition of the calcite of the shale, with
The pore volume of the shale and the degree of correlation of pore specific surface area are higher, and in conjunction with actual geological analysis, the preset value of c for example can be with
It is 0.2,0.17 or 0.15.
After determining the value of a, b and c, by parameters RTOC、RFeS2And RCaThe corresponding weight coefficient phase of difference
Multiply, then items are added, obtain the characterization parameter R that shale preserves abilityC；RCValue is bigger, and it is higher that the shale preserves ability, treats
Survey the possibility containing shale gas in shale higher.
Further, this is according to the maximum of TOC contents in this every piece TOC content of sample and at least one piece sample,
Determine TOC evaluatings, including：
According to the ratio of TOC content maximums in this every piece TOC content of sample and at least one piece sample, it is determined that should
TOC evaluatings.
Specifically,
RTOC=TOC/TOCmax(formula 2)
Wherein TOC is this every piece TOC content of sample, TOCmaxIt is the maximum of TOC contents at least one piece sample.
In the method on the basis of the peak of the TOC contents extracted in shale reservoir to be measured, this every piece sample is carried out
The standardization of TOC contents, determines the TOC evaluatings so that TOC evaluatings are between 0~1.Now, TOC evaluates ginseng
Number, increases with the increase of TOC contents, and TOC values are bigger, then TOC evaluatings value is closer to 1.
Further, according to pyrite in this every piece weight/mass percentage composition of the pyrite of sample and at least one piece sample
Weight/mass percentage composition maximum, determine pyrite evaluating, including：
According to the quality hundred of pyrite in this every piece weight/mass percentage composition of the pyrite of sample and at least one piece sample
Divide the ratio of the maximum of content, determine the pyrite evaluating.
Specifically,
RFeS2=FeS2/FeS2max(formula 3)
Wherein FeS2It is this every piece weight/mass percentage composition of the pyrite of sample, FeS2maxIt is Huang at least one piece sample
The maximum of the weight/mass percentage composition of iron ore.
Peak in the method with the weight/mass percentage composition of pyrite in the sample of extraction in shale reservoir to be measured is as base
Standard, carries out this every piece standardization of the weight/mass percentage composition of the pyrite of sample, determines the pyrite evaluating so that Huang Tie
Ore deposit evaluating is between 0~1.Pyrite evaluating increases with the increase of the weight/mass percentage composition of pyrite, Huang Tie
The weight/mass percentage composition of ore deposit is bigger, then pyrite evaluating value is closer to 1.
Further, this is just solved according in this every piece weight/mass percentage composition of the calcite of sample and at least one piece sample
The maximum of the weight/mass percentage composition of stone, determines calcite evaluating, including：
Determine the maximum and this every block calcite of sample of the weight/mass percentage composition of calcite at least one piece sample
Weight/mass percentage composition difference；
According to the difference and this every piece ratio of the weight/mass percentage composition of the calcite of sample, determine that the calcite evaluation is joined
Number.
Specifically,
RCa=(CaCO3max-CaCO3)/CaCO3max(formula 4)
Wherein, CaCO3It is this every piece weight/mass percentage composition of the calcite of sample, CaCO3maxFor at least one piece sample
The maximum of the weight/mass percentage composition of calcite.
Peak in the method with the weight/mass percentage composition of calcite in the sample of extraction in shale reservoir to be measured is as base
Standard, carries out this every piece standardization of the weight/mass percentage composition of the calcite of sample, determines the calcite evaluating so that Fang Xie
Stone evaluating is between 0~1.Calcite evaluating is reduced with the increase of the weight/mass percentage composition of calcite, Fang Xie
The weight/mass percentage composition of stone is smaller, then calcite evaluating value is closer to 1.
Further, the pyrite includes：Ferrous disulfide (FeS2)；The calcite includes：Calcium carbonate (CaCO3)。
Optionally, the present invention also provides a kind of shale and preserves capacity judging method, another page that Fig. 3 is provided for the present invention
Rock preserves the flow chart of the determination method of ability.As shown in figure 3, the method may include following steps：
S301, the mineralogical composition content and this every piece TOC of sample that determine at least one piece sample of shale every piece of sample
Content.
In practical application, such as, for the shale of Chongqing southeast Longma small stream group, 15 pieces of samples of Longma small stream group can be taken in the method
Product determine the TOC contents of every piece of mineralogical composition content of sample and this every piece sample, and detailed data is as shown in table 3.
Table 3
| Sample number into spectrum | TOC contents | The weight/mass percentage composition of pyrite | The weight/mass percentage composition of calcite |
| 1 | 2.64 | 2.4 | 0 |
| 2 | 3.1 | 3.6 | 0 |
| 3 | 2.9 | 2 | 0 |
| 4 | 3.6 | 4.2 | 0 |
| 5 | 4.1 | 0 | 7.8 |
| 6 | 3.4 | 0 | 1.8 |
| 7 | 4.63 | 3.1 | 5.8 |
| 8 | 3.35 | 4.8 | 7.8 |
| 9 | 2.82 | 6.8 | 5.8 |
| 10 | 3.19 | 4.8 | 10.4 |
| 11 | 4.4 | 4.8 | 0 |
| 12 | 3.2 | 3.9 | 2.6 |
| 13 | 5.3 | 0 | 0 |
| 14 | 3.2 | 2.6 | 5.3 |
| 15 | 5.3 | 6.1 | 5.8 |
S302, the ratio according to TOC content maximums in the TOC contents and at least one piece sample of this every piece sample, really
Determine TOC evaluatings.
For example, can be according to the maximum of TOC contents in this every piece TOC content of sample and 15 pieces of samples in the S302
Value, using above-mentioned formula 2, determines this every piece value of the TOC evaluatings of sample.
S303, the matter according to pyrite in this every piece weight/mass percentage composition and at least one piece sample of the pyrite of sample
The ratio of the maximum of percentage composition is measured, pyrite evaluating is determined, pyrite evaluating is determined.
For example, can be according to yellow in this every piece weight/mass percentage composition of the pyrite of sample and 15 pieces of samples in the S303
The maximum of the weight/mass percentage composition of iron ore, using above-mentioned formula 3, determines this every piece value of the pyrite evaluating of sample.
S304, determine calcite at least one piece sample weight/mass percentage composition maximum and this every piece side of sample
The difference of the weight/mass percentage composition of Xie Shi；
According to the difference and this every piece ratio of the weight/mass percentage composition of the calcite of sample, the calcite evaluation is determined
Parameter.
For example, can be according to side in this every piece weight/mass percentage composition of the calcite of sample and 15 pieces of samples in the S304
The maximum of the weight/mass percentage composition of Xie Shi, using above-mentioned formula 4, determines this every piece value of the calcite evaluating of sample.
S305, according to the TOC evaluatings, the pyrite evaluating, and the calcite evaluating, determine this every piece
The storage evaluation parameter of sample.
For example, according to the TOC evaluatings, the pyrite evaluating in this every piece sample, and can be somebody's turn to do in the S305
The value of calcite evaluating, using above-mentioned formula 1, determines this every piece value of the storage evaluation parameter of sample.
S306, determine at least one piece average value of the storage evaluation parameter of sample, at least one piece storage of sample
The average value for collecting merit rating parameter is the storage evaluation parameter of the shale.For example, 15 pieces of storages of sample in the S305
Collect the average value of the value of merit rating parameter, be the value of the storage evaluation parameter of the shale.Detailed data is as shown in table 4.
Table 4
Capacity judging method is preserved using the shale described in above-mentioned Fig. 3, with 31 pieces of shale samples of the northeast Niutitang group that changes
As a example by, can obtain every piece of value of the TOC evaluatings of sample, value, this every piece sample of the pyrite evaluating of this every piece sample
The value of the value of the calcite evaluating of product, the storage evaluation parameter of this every piece sample, and the shale preserves ability
The value of evaluating.Detailed data can be as shown in table 5.
Table 5
The southeast Longma small stream group shale that changes can be drawn by the average value for contrasting two groups of Rc values of shale samples preserves energy
Power is higher than the conclusion of Chongqing northeast Niutitang group.Additionally, can also draw the relative of each piece of sample according to this every piece Rc value of sample
Preserve the size of ability.
The shale that the above embodiment of the present invention is provided preserves capacity judging method, effectively reduces determination shale and preserves ability
Experiment difficulty, simplify experimental implementation.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of shale preserves capacity judging method, it is characterised in that including：
Determine at least one piece sample of shale the mineralogical composition content of every piece of sample and the total organic carbon TOC of every piece of sample
Content；
What the TOC contents of mineralogical composition content and every piece of sample according to every piece of sample determined the shale preserves energy
Power.
2. method according to claim 1, it is characterised in that the mineralogical composition content of every piece of sample includes pyrite
Weight/mass percentage composition and calcite weight/mass percentage composition.
3. method according to claim 2, it is characterised in that the mineralogical composition content according to every piece of sample and
The TOC contents of every piece of sample determine the ability of preserving of the shale, including：
The maximum of TOC contents in TOC contents and at least one piece sample according to every piece of sample, determines that TOC is evaluated
Parameter；
The quality hundred of pyrite in the weight/mass percentage composition of the pyrite according to every piece of sample and at least one piece sample
Divide the maximum of content, determine pyrite evaluating；
The quality hundred of calcite in the weight/mass percentage composition of the calcite according to every piece of sample and at least one piece sample
Divide the maximum of content, determine calcite evaluating；
According to the TOC evaluatings, the pyrite evaluating, and the calcite evaluating, the rock stratum is determined
Storage evaluation parameter；The storage evaluation parameter of the rock stratum is bigger, the rock stratum to preserve ability stronger.
4. method according to claim 3, it is characterised in that described to be commented according to the TOC evaluatings, the pyrite
Valency parameter, and the calcite evaluating, determine the storage evaluation parameter of the rock stratum, including：
RC=a*RTOC+b*RCa+c*RFeS2
Wherein, RTOCIt is the TOC evaluatings, RFeS2It is the pyrite evaluating, RCaFor the calcite evaluation is joined
Number；RCIt is the storage evaluation parameter of the shale；A, b, c are preset value.
5. method according to claim 3, it is characterised in that TOC contents according to every piece of sample and described
The maximum of TOC contents, determines TOC evaluatings at least one piece sample, including：
The ratio of the maximum of TOC contents, determines institute in TOC contents and at least one piece sample according to every piece of sample
State TOC evaluatings.
6. method according to claim 3, it is characterised in that the quality hundred of the pyrite according to every piece of sample
Divide the maximum of the weight/mass percentage composition of pyrite in content and at least one piece sample, determine pyrite evaluating, wrap
Include：
The quality hundred of pyrite in the weight/mass percentage composition of the pyrite according to every piece of sample and at least one piece sample
Divide the ratio of the maximum of content, determine the pyrite evaluating.
7. method according to claim 3, it is characterised in that the quality hundred of the calcite according to every piece of sample
Divide the maximum of the weight/mass percentage composition of calcite in content and at least one piece sample, determine calcite evaluating, wrap
Include：
It is determined that at least one piece sample weight/mass percentage composition of calcite maximum and the calcite of every piece of sample
Weight/mass percentage composition difference；
According to the difference and the ratio of the weight/mass percentage composition of the calcite of every piece of sample, the calcite evaluation is determined
Parameter.
8. the method according to any one of claim 2-7, it is characterised in that the pyrite includes：Ferrous disulfide；Institute
Stating calcite includes：Calcium carbonate.
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