CN109959674A - A kind of oil sources discrimination method of terrestrial facies complexity crude oil - Google Patents
A kind of oil sources discrimination method of terrestrial facies complexity crude oil Download PDFInfo
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- 239000003921 oil Substances 0.000 title claims abstract description 146
- 239000010779 crude oil Substances 0.000 title claims abstract description 98
- 208000035126 Facies Diseases 0.000 title claims abstract description 37
- 238000012850 discrimination method Methods 0.000 title claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 104
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 89
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 82
- 239000001257 hydrogen Substances 0.000 claims abstract description 82
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000001228 spectrum Methods 0.000 claims abstract description 67
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 125000000524 functional group Chemical group 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000011160 research Methods 0.000 claims abstract description 6
- 229930195734 saturated hydrocarbon Natural products 0.000 claims description 26
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 claims description 22
- -1 carboxyl carbon Chemical compound 0.000 claims description 21
- 241000195493 Cryptophyta Species 0.000 claims description 15
- 241000196324 Embryophyta Species 0.000 claims description 14
- 229920006395 saturated elastomer Polymers 0.000 claims description 13
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 9
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 claims description 8
- SNVLJLYUUXKWOJ-UHFFFAOYSA-N methylidenecarbene Chemical compound C=[C] SNVLJLYUUXKWOJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 150000001924 cycloalkanes Chemical class 0.000 claims description 6
- 150000002431 hydrogen Chemical class 0.000 claims description 5
- 238000005481 NMR spectroscopy Methods 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 238000012916 structural analysis Methods 0.000 claims description 4
- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 2
- VILAVOFMIJHSJA-UHFFFAOYSA-N dicarbon monoxide Chemical compound [C]=C=O VILAVOFMIJHSJA-UHFFFAOYSA-N 0.000 claims description 2
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 239000003208 petroleum Substances 0.000 abstract description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 18
- 229930195733 hydrocarbon Natural products 0.000 description 15
- 150000002430 hydrocarbons Chemical class 0.000 description 15
- 239000011159 matrix material Substances 0.000 description 9
- 150000001335 aliphatic alkanes Chemical class 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 125000006519 CCH3 Chemical group 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 239000000090 biomarker Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000004566 IR spectroscopy Methods 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000005311 nuclear magnetism Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- ZWAJLVLEBYIOTI-OLQVQODUSA-N (1s,6r)-7-oxabicyclo[4.1.0]heptane Chemical compound C1CCC[C@@H]2O[C@@H]21 ZWAJLVLEBYIOTI-OLQVQODUSA-N 0.000 description 1
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 229910052805 deuterium Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
- G01N24/087—Structure determination of a chemical compound, e.g. of a biomolecule such as a protein
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Abstract
The present invention proposes a kind of oil sources discrimination method of terrestrial facies complexity crude oil, belongs to petroleum geology technical field, this method can rapidly and efficiently recognize the oil sources of terrestrial facies complexity crude oil, and identification result is accurate and reliable.This method comprises the following steps: acquisition research area's crude oil sample removes the solid impurity and water in crude oil sample；Magnetic resonance detection is carried out to pretreated crude oil sample, obtains carbon spectrum and hydrogen spectrum；According to obtained carbon spectrum and hydrogen spectrum, the functional group of indication oil source characteristics is identified, and determine the microstructure parameter for being used for indication oil source characteristics；According to obtained carbon spectrum and hydrogen spectrum, the numerical value of above-mentioned microstructure parameter is calculated, and establishes oil sources identification plate, oil sources is recognized.
Description
Technical field
The invention belongs to petroleum geology technical field more particularly to a kind of oil sources discrimination methods of terrestrial facies complexity crude oil.
Background technique
Oil-gas-source analysis is a basic content of petroleum geology geochemical investigation, refer to by crude oil and natural gas with
The affiliation of organic source of parents specific input compares and analyzes between possible source rock, can recognize and trace oil and natural gas
Possibility source.
Complicated crude oil includes mixed crude and degrading crude oil, and Chinese many basins are as in the western Junggar Basin, tower
Tub and east Bohai gulf basin, Hydrocarbon accumulation process all show multi-source, degradation transformation feature.With western standard
For the basin of Gaer, mixed type and degradation-type oil reservoir occupy sizable ratio, Basin South Margin Mesozoic Era Mixed Reservoirs, west
The northern fringe terrain oil sands, bitumen and Shallow Heavy Oil Reservoir all show unique characteristics.Since migration fractionation effect is transformed with later stage degradation
The feature complication so that complicated crude oil is acted on, great difficulty is brought for the oil sources identification of complicated crude oil.
The traditional technology of existing crude oil oil sources identification is substantially foundation on the basis of geochemical analysis, utilizes spy
The relative ratio parameter of fixed biomarker to analyze the crude oil that oil reservoir has several sources, then with hydrocarbon source rock passes through phase
Oil sources judgement is carried out like i.e. homologous principle.However, since a large amount of later stage degradation acts on the transformation to crude oil biological marker,
These existing technologies are actually difficult to carry out effective oil sources identification to the higher crude oil of separate sources, palliating degradation degree in oil reservoir,
What i.e. traditional technology solved is single oil sources, the lower oil sources identification problem of palliating degradation degree, but serious for migration fractionation, degradation
Crude oil oil sources identification problem, traditional technology cannot solve very well.
In the patent CN107192688A that inventor applies early period, a kind of mixed crude, degrading crude oil oil sources are provided
Discrimination method recognizes the oil sources of complicated crude oil using the infrared spectroscopy feature of crude oil.However later experiments are found, the party
Method has good applicability for the complicated crude oil of marine facies, but for the complicated crude oil of terrestrial facies, oil sources identification result is still not
Accurately.
Thus, how a kind of oil sources discrimination method being applicable to terrestrial facies complexity crude oil is provided, is current urgently to be solved
One technical problem.
Summary of the invention
The present invention for the above technical issues, proposes a kind of oil sources discrimination method of terrestrial facies complexity crude oil, according to terrestrial facies
The nuclear magnetic spectrogram parameter of complicated crude oil filters out the functional group that can sensitively reflect oil source characteristics, utilizes these functional groups
Constants of nuclear magnetic resonance realizes the oil sources identification to terrestrial facies complexity crude oil, and identification result is accurate and reliable, has to Analysis of Hydrocarbon Accumulation
Important meaning.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of oil sources discrimination method of terrestrial facies complexity crude oil, includes the following steps:
Sample acquisition and pretreatment: acquisition research area's crude oil sample removes the solid impurity and water in crude oil sample；
Structural analysis: carrying out magnetic resonance detection to pretreated crude oil sample, obtains carbon spectrum and hydrogen spectrum；
Oil sources identification: it is composed according to obtained carbon spectrum and hydrogen, identifies the functional group of indication oil source characteristics, and determine for referring to
Levy the microstructure parameter of oil source characteristics；According to obtained carbon spectrum and hydrogen spectrum, the numerical value of above-mentioned microstructure parameter is calculated, and build
Vertical oil sources recognizes plate, recognizes to oil sources.
Preferably, the functional group of the indication oil source characteristics includes: in carbon spectrum, chemical displacement value is 150-170ppm's
It is substituted aromatic carbon, in the bridge carbon of 130-150ppm, in the aromatic carbon of 100-130ppm, in the carboxyl carbon of 170-182ppm,
Double carbonyl carbons of 180-190ppm, in the aldehyde radical carbon of 195-205ppm, in the carbonyl carbon of 202-220ppm, 60-100ppm's
Alkene carbon, in the methyl carbon of 9-21.39ppm, in the mesomethylene carbon of 21.39-36.15ppm, in the methine of 36.15-60ppm
Carbon；Hydrogen spectrum in, chemical displacement value 0.5-1.00ppm γ hydrogen of saturation methyl hydrogen and cycloalkane, 1.00-1.95ppm's
It is saturated the position the β hydrogen of methine hydrogen and cyclic hydrocarbon, in α hydrogen of aromatic ring of 1.95-4.00ppm, in the alkene hydrogen of 4.50-6.00ppm,
The fragrant hydrogen of 7.05-9.20ppm.
Preferably, the microstructure parameter includes: methyl carbon relative amount f in saturated hydrocarbonsCH3, methylene in saturated hydrocarbons
Base carbon relative amount fCH2, methine carbon relative amount f in saturated hydrocarbonsCH, three-level carbon content fCt, second level and level Four total carbon
fCsq, saturation γ hydrogen total content f of methyl hydrogen and cycloalkaneHγ, saturation methine hydrogen and cyclic hydrocarbon the position β hydrogen total content fHβ；It is described
It includes: with methyl carbon relative amount f in saturated hydrocarbons that oil sources, which recognizes plate,CH3, saturated hydrocarbons methylene carbon relative amount fCH2With it is full
With methine carbon relative amount f in hydrocarbonCHThe saturated hydrocarbons established for three sides is with respect to carbon content axonometric projection version, with three-level carbon content fCt
With saturation γ hydrogen total content f of methyl hydrogen and cycloalkaneHγThe f that relationship is establishedCt-fHγPlate, with second level and level Four total carbon
fCsqWith the position the β hydrogen total content f of saturation methine hydrogen and cyclic hydrocarbonHβThe f that relationship is establishedCsq-fHβPlate.
Preferably, the specific steps recognized using oil sources identification plate to oil sources are as follows: contain in saturated hydrocarbons relative carbon
It measures in triangle plate, works as fCH2When > 75%, then judge that oil sources may be algae, it is on the contrary then judge that oil sources may be higher plant；
In fCt-fHγIn plate, work as fCt< 30% and fHγWhen < 23%, then judge that oil sources may be higher plant, it is on the contrary then judge oil sources
It may be algae；In fCsq-fHβIn plate, work as fCsp< 75% and fHβWhen > 60%, then judge that oil sources may be higher plant, instead
Then judge that oil sources may be algae；When the conclusion obtained according to 3 kinds of oil sources identification plates is consistent, it is determined that identification result,
If inconsistent, using the judgement conclusion more than frequency of occurrence as identification result.
Preferably, the magnetic resonance detection uses deuterated chloroform for solvent, tetramethylsilane is internal standard compound；Carbon spectrum
Detection parameters setting are as follows: scanning times are 3000 times, spectrum width 249ppm, and the acquisition time is 0.37s；The detection parameters of hydrogen spectrum are set
Be set to: scanning times are 32 times, spectrum width 20ppm, and the acquisition time is 2.32s.
Compared with prior art, the advantages and positive effects of the present invention are:
1, the oil sources discrimination method of terrestrial facies complexity crude oil provided by the invention obtains complicated original by magnetic resonance detection
The chemical structure information of oil, and then different nuclear magnetic spectrogram features is had according to separate sources crude oil, can filter out can be sensitive
Reflect the functional group of oil source characteristics and determine the microstructure parameter for being used for indication oil source characteristics, then according to these chemical structures
Parameter establishes oil sources identification plate, the oil sources identification to complicated crude oil is realized using oil sources identification plate, for complicated crude oil
Oil sources identification provides new method, has great importance to Analysis of Hydrocarbon Accumulation；
2, the oil sources discrimination method of terrestrial facies complexity crude oil provided by the invention recognizes analysis means phase with conventional oil sources
Than it is advantageous that characteristic group and microstructure parameter are mixed and are dropped relative to traditional organic-biological marker compounds
The influence of solution is smaller, can reflection complexity crude oil oil sources rapidly and efficiently, accurately, qualitative, quantitative；
3, the oil sources discrimination method of terrestrial facies complexity crude oil provided by the invention, especially suitable for terrestrial facies complexity crude oil, identification
Result precision is high, solves using crude oil infrared spectroscopy feature result inaccuracy when to the progress oil sources identification of terrestrial facies complexity crude oil
The problem of.
Detailed description of the invention
Fig. 1 is the flow diagram of the oil sources discrimination method of terrestrial facies complexity crude oil provided by the embodiment of the present invention；
Fig. 2 is the carbon spectrum of terrestrial facies complexity crude oil provided by the embodiment of the present invention；
Fig. 3 is the hydrogen spectrum of terrestrial facies complexity crude oil provided by the embodiment of the present invention；
Fig. 4 is saturated hydrocarbons provided by the embodiment of the present invention with respect to carbon content axonometric projection version；
Fig. 5 is f provided by the embodiment of the present inventionCt-fHγPlate；
Fig. 6 is f provided by the embodiment of the present inventionCsq-fHβPlate.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Referring to Fig. 1, the embodiment of the invention provides a kind of oil sources discrimination methods of terrestrial facies complexity crude oil, including walk as follows
It is rapid:
The acquisition of S1 sample and pretreatment: acquisition research area's crude oil sample removes the solid impurity and water in crude oil sample.
In this step, when acquisition research area's crude oil sample, need to guarantee each in sample covering research area collected
Region, to ensure the accuracy of identification result.The solid impurity and water in crude oil sample are removed in this step, can exclude solid
The influence of impurity and water to crude oil sample magnetic resonance detection result provides reliable data for the oil sources identification of complicated crude oil.
The mode that filtering can be used in solid impurity in crude oil sample removes, the removal step of water are as follows: be added into crude oil sample anhydrous
Sodium sulphate is stood after rocking, and is filtered after standing 24 hours.
S2 structural analysis: carrying out magnetic resonance detection to pretreated crude oil sample, obtains carbon spectrum and hydrogen spectrum.
It in this step, being capable of clearly discrimination complexity crude oil structure by magnetic resonance detection.In actual mechanical process
In, the resolution ratio that the carbon spectrum and hydrogen of the complicated crude oil obtained using conventional magnetic resonance detection condition are composed is usually lower.In order to mention
The resolution ratio of high-carbon spectrum and hydrogen spectrum, with clear, accurate discrimination complexity crude oil structure, in the present invention, it is preferred to following detector bar
Part: magnetic resonance detection uses deuterated chloroform for solvent, and tetramethylsilane is internal standard compound；The detection parameters setting of carbon spectrum are as follows: sweep
Retouching number is 3000 times, spectrum width 249ppm, and the acquisition time is 0.37s；The detection parameters setting of hydrogen spectrum are as follows: scanning times 32
Secondary, spectrum width 20ppm, the acquisition time is 2.32s.Above-mentioned preferred magnetic resonance detection condition can be improved carbon spectrum and hydrogen spectrum
Resolution ratio, can be clear and discrimination accurately be carried out to complicated crude oil structure, be recognized for subsequent oil sources and accurate data are provided.
The identification of S3 oil sources: it is composed according to obtained carbon spectrum and hydrogen, identifies the functional group of indication oil source characteristics, and determination is used for
The microstructure parameter of indication oil source characteristics；According to obtained carbon spectrum and hydrogen spectrum, the numerical value of above-mentioned microstructure parameter is calculated, and
Oil sources identification plate is established, oil sources is recognized.
In this step, it should be noted that since the chemical structure of separate sources crude oil is not exactly the same, nuclear-magnetism spectrum
In figure particular functional group can indication oil source characteristics, thus, in this step by carbon spectrum and hydrogen spectrum identify, may recognize that
It is capable of the functional group of indication oil source characteristics, and then the change for indication oil source characteristics can determine according to the functional group that these are identified
Structural parameters are learned, the specific value for obtaining these microstructure parameters can be calculated, and then according to carbon spectrum and hydrogen spectrum with these chemistry
Values of the structural parameters is that Index Establishment oil sources recognizes plate, it can be achieved that accurate recognition to oil sources.
Referring to figs. 2 and 3, Fig. 2 shows the carbon of terrestrial facies complexity crude oil spectrum, Fig. 3 shows the hydrogen spectrum of terrestrial facies complexity crude oil,
The functional group that may recognize that indication oil source characteristics by Fig. 2 and Fig. 3 summarizes as shown in table 1.
The functional group's information for the indication oil source characteristics that table 1 identifies
Preferred microstructure parameter includes: methyl carbon relative amount f in saturated hydrocarbonsCH3, saturated hydrocarbons methylene carbon phase pair
Content fCH2, methine carbon relative amount f in saturated hydrocarbonsCH, three-level carbon content fCt, second level and level Four total carbon fCsq, saturation first
γ hydrogen total content f of base hydrogen and cycloalkaneHγ, saturation methine hydrogen and cyclic hydrocarbon the position β hydrogen total content fHβ。
It should be noted that according to fig. 2 as it can be seen that the carbon atom type of crude oil saturated hydrocarbons is mainly by methyl carbon (- CH3), it is sub-
Methyl carbon (- CH2) and methine carbon (- CH) composition, the composition characteristic of these three different types of carbon atoms is by crude oil hydrocarbon
Matrix influences, thus, it is preferable to fCH3、fCH2And fCHAs the microstructure parameter for indication oil source characteristics.fCtCrude oil can be reacted
Middle short chain alkanes or polysubstituted alkane situation, fHγPolysubstituted alkane situation, short chain alkanes and polysubstituted alkane in crude oil can be reacted
It is influenced by crude oil source of parents, thus, it is preferable to fCtAnd fHγAs the microstructure parameter for indication oil source characteristics.fHβIt can be anti-
Crude oil wax component situation is reflected, and wax component is influenced by crude oil hydrocarbon matrix, and fCsqIt is female with hydrocarbon matrix maturity and crude oil
Source is related, thus, it is preferable to fCsqAnd fHβAs the microstructure parameter for indication oil source characteristics.
According to carbon spectrum and hydrogen spectrum, the formula for calculating above-mentioned microstructure parameter numerical value is as follows:
fCH3=CCH3/(CCH3+CCH2+CCH1) (1)
fCH2=CCH2/(CCH3+CCH2+CCH1) (2)
fCH=CCH/(CCH3+CCH2+CCH1) (3)
fHγ=Hγ (6)
fHβ=Hβ (8)
In formula (1)-formula (8), symbol Csa、CC-C、Ca、CCOOH、CCOCO、CCHO、CCO、Col、CCH3、CCH2、CCH1、HγAnd HβInstitute
The meaning of expression is referring to table 1, fCH3For the relative amount of methyl carbon in saturated hydrocarbons, fCH2Opposite for saturated hydrocarbons methylene carbon contains
Amount, fCHFor the relative amount of methine carbon in saturated hydrocarbons, fCarFor aromatic carbon content, fCtFor three-level carbon content, fHγTo be saturated first
γ hydrogen total contents of base hydrogen and cycloalkane, fCsqFor second level and level Four total carbon, fHβFor the position β for being saturated methine hydrogen and cyclic hydrocarbon
Hydrogen total content.
According to above-mentioned preferred microstructure parameter, establishing preferred oil sources identification plate includes: with methyl in saturated hydrocarbons
Carbon relative amount fCH3, saturated hydrocarbons methylene carbon relative amount fCH2With methine carbon relative amount f in saturated hydrocarbonsCHIt is built for three sides
Vertical saturated hydrocarbons is with respect to carbon content axonometric projection version, with three-level carbon content fCtWith saturation γ hydrogen total contents of methyl hydrogen and cycloalkane
fHγThe f that relationship is establishedCt-fHγPlate, with second level and level Four total carbon fCsqIt is total with the position the β hydrogen of saturation methine hydrogen and cyclic hydrocarbon
Content fHβThe f that relationship is establishedCsq-fHβPlate.
It should be noted that the saturated hydrocarbons established is with respect in carbon content axonometric projection version, the relative amount of three kinds of carbon is by hydrocarbon
Matrix influences, fCH2Higher, then its hydrocarbon matrix is more biased towards in algae, thus, it can with respect to carbon content axonometric projection version using saturated hydrocarbons
Oil sources is recognized.The f of foundationCt-fHγIn plate, fCtIt is more high, reflect crude oil rich in polysubstituted alkane, fHγIt is higher same
It can reflect crude oil rich in short chain alkanes or polysubstituted alkane, the two, which combines, then reflects that its hydrocarbon matrix is more biased towards in algae, thus,
Utilize fCt-fHγPlate can recognize oil sources.The f of foundationCsq-fHβIn plate, fCsqIt is more low, reflect that maturity is higher, fHβ
It is more high, reflect that crude oil wax component is higher, the two, which combines, then reflects that its hydrocarbon matrix is more biased towards in higher plant, thus, it utilizes
fCsq-fHβPlate can recognize oil sources.
The specific steps that oil sources is recognized using above-mentioned preferred oil sources identification plate are as follows: in saturated hydrocarbons with respect to carbon content
In triangle plate, work as fCH2When > 75%, then judge that oil sources may be algae, it is on the contrary then judge that oil sources may be higher plant；?
fCt-fHγIn plate, work as fCt< 30% and fHγWhen < 23%, then judge that oil sources may be higher plant, it is on the contrary then judge that oil sources can
It can be algae；In fCsq-fHβIn plate, work as fCsp< 75% and fHβWhen > 60%, then judge that oil sources may be higher plant, it is on the contrary
Then judge that oil sources may be algae；When the conclusion obtained according to 3 kinds of oil sources identification plates is consistent, it is determined that identification result, if
It is inconsistent, then using the judgement conclusion more than frequency of occurrence as identification result.
The oil sources discrimination method of above-mentioned terrestrial facies complexity crude oil provided by the invention, obtains complexity by magnetic resonance detection
The chemical structure information of crude oil, and then different nuclear magnetic spectrogram features is had according to separate sources crude oil, can filter out can be quick
The functional group of sense reflection oil source characteristics simultaneously determines the microstructure parameter for being used for indication oil source characteristics, is then tied according to these chemistry
Structure parameter establishes oil sources identification plate, the oil sources identification to complicated crude oil is realized using oil sources identification plate, for complicated crude oil
Oil sources identification provide new method, have great importance to Analysis of Hydrocarbon Accumulation.Meanwhile above-mentioned terrestrial facies provided by the invention
The oil sources discrimination method of complicated crude oil, compared with conventional oil sources identification analysis means, it is advantageous that characteristic group and change
Learn structural parameters relative to traditional organic-biological marker compounds by mix and degrade influenced it is smaller, can rapidly and efficiently,
Accurately, qualitative, quantitative reflection complexity crude oil oil sources.Moreover, the oil sources of above-mentioned terrestrial facies complexity crude oil provided by the invention recognizes
Method, especially suitable for terrestrial facies complexity crude oil, identification result accuracy is high, solves using crude oil infrared spectroscopy feature to terrestrial facies
Complicated crude oil carries out the problem of result inaccuracy when oil sources identification.
In order to become apparent from the oil sources discrimination method for introducing terrestrial facies complexity crude oil provided by the embodiment of the present invention in detail, under
Face will be described in conjunction with specific embodiments.
Embodiment 1
The acquisition of S1 sample and pretreatment: the sample for selecting 33 CONTINENTAL CRUDE samples of Dong- pu Depression to test as this,
And the solid impurity in CONTINENTAL CRUDE sample is removed by the way of filtering, anhydrous sodium sulfate is added into CONTINENTAL CRUDE sample,
It is stood after rocking, filtering is after standing 24 hours to remove the water in CONTINENTAL CRUDE sample.
S2 structural analysis: carrying out magnetic resonance detection to pretreated CONTINENTAL CRUDE sample, obtains carbon spectrum and hydrogen spectrum.
Magnetic resonance detection carries out on the NMR spectrometer with superconducting magnet of Brooker 600MHz, and testing conditions are as follows: using deuterium
For chloroform (CDCl3) be solvent (it should be noted that: due to CDCl3It is volatile, thus needing after completing will be containing the nuclear-magnetism of sample
Pipe is put into refrigerator and saves), tetramethylsilane (TMS) is internal standard compound；The detection parameters setting of carbon spectrum are as follows: scanning times (NS) are
3000 times, spectrum width (SW) is 249ppm, and obtaining time (AQ) is 0.37s；The detection parameters setting of hydrogen spectrum are as follows: scanning times (NS)
It is 32 times, spectrum width (SW) is 20ppm, and obtaining time (AQ) is 2.32s.
The operating process of Nuclear Magnetic Resonance is as follows: sample insertion rotor → sample cell with rotor is put into magnet → is set
Set temperature → lock field → tuning → shimming → measurement water peak position and 1H90 ° of pulse → creation experiment catalogue → setting experiment parameter
→ setting gain → sampling.
Using a CONTINENTAL CRUDE sample as representative, carbon spectrum is as shown in Fig. 2, hydrogen composes the spectrogram as shown in figure 3, remaining sample
It does not show one by one.
The identification of S3 oil sources: it is composed according to obtained carbon spectrum and hydrogen, identifies the functional group of indication oil source characteristics, and determination is used for
The microstructure parameter of indication oil source characteristics；According to obtained carbon spectrum and hydrogen spectrum, the numerical value of above-mentioned microstructure parameter is calculated, and
Oil sources identification plate is established, oil sources is recognized.
The carbon spectrum and hydrogen spectrum of 33 CONTINENTAL CRUDE samples based on Dong- pu Depression, identify the functional group of indication oil source characteristics
As shown in table 1, determine that the microstructure parameter for indication oil source characteristics includes: methyl carbon relative amount f in saturated hydrocarbonsCH3, it is full
With hydrocarbon methylene carbon relative amount fCH2, methine carbon relative amount f in saturated hydrocarbonsCH, three-level carbon content fCt, second level and level Four
Total carbon fCsq, saturation γ hydrogen total content f of methyl hydrogen and cycloalkaneHγ, saturation methine hydrogen and cyclic hydrocarbon the position β hydrogen total content
fHβ。
Count the peak face of the above-mentioned functional group identified in the carbon spectrum and hydrogen spectrum of 33 CONTINENTAL CRUDE samples of Dong- pu Depression
Product accounting, statistical result is as shown in table 2 and table 3.
The peak area accounting statistical result (%) of the Tan Puzhong functional group of 33 crude oil samples of 2 Dong- pu Depression of table
The peak area accounting statistical result (%) of the Qing Puzhong functional group of 33 crude oil samples of 3 Dong- pu Depression of table
According to the data of table 2 and table 3, above-mentioned microstructure parameter, calculated result such as table 4 are calculated using formula (1)-formula (8)
It is shown.
The microstructure parameter value (%) of 33 crude oil samples of 4 Dong- pu Depression of table
| Number | Pound sign | fCH3 | fCH2 | fCH | fCar | fCt | fCsq | fHγ | fHβ |
| 1 | Liu 17 | 1.90 | 35.36 | 62.74 | 0.90 | 63.47 | 33.91 | 20.58 | 66.71 |
| 2 | Bridge 2-8 | 15.30 | 82.88 | 1.81 | 5.30 | 0.88 | 81.27 | 19.02 | 80.85 |
| 3 | Pu 1-103 | 15.08 | 75.76 | 9.17 | 0.23 | 6.94 | 77.94 | 24.63 | 72.66 |
| 4 | Defend 410 | 16.25 | 80.14 | 3.61 | 0.29 | 1.03 | 82.63 | 26.46 | 50.61 |
| 5 | Defend 77-16 | 7.18 | 88.93 | 3.89 | 2.87 | 0.99 | 89.54 | 20.93 | 68.67 |
| 6 | Liu 20 | 14.70 | 77.86 | 7.44 | 0.00 | 5.09 | 80.38 | 20.07 | 79.16 |
| 7 | Liu 25 | 27.91 | 61.33 | 10.76 | 0.60 | 9.05 | 62.42 | 24.34 | 68.64 |
| 8 | Pu 7-18 | 26.35 | 61.23 | 12.42 | 0.15 | 10.82 | 62.57 | 23.98 | 75.45 |
| 9 | Hu 39-12 | 15.72 | 61.70 | 22.58 | 0.43 | 21.30 | 62.67 | 20.18 | 54.41 |
| 10 | Bridge 29-4 | 15.17 | 80.46 | 4.37 | 0.80 | 1.79 | 82.53 | 24.07 | 75.33 |
| 11 | Text 197 | 14.49 | 75.51 | 10.00 | 0.73 | 7.78 | 77.27 | 31.36 | 67.34 |
| 12 | Literary 220-12 | 11.00 | 80.90 | 8.10 | 0.00 | 5.68 | 83.59 | 22.44 | 77.36 |
| 13 | Pu 92-8 | 23.18 | 63.44 | 13.38 | 0.70 | 11.67 | 64.53 | 22.64 | 54.14 |
| 14 | Defend 349-19 | 24.27 | 68.70 | 7.03 | 0.44 | 4.95 | 70.38 | 23.24 | 70.55 |
| 15 | Hu 5-235 | 10.18 | 80.73 | 9.10 | 0.16 | 6.70 | 83.25 | 22.97 | 66.65 |
| 16 | Horse 11-89 | 26.42 | 69.84 | 3.74 | 0.00 | 1.51 | 71.96 | 21.31 | 78.29 |
| 17 | Bridge 7-2 | 12.73 | 65.66 | 21.60 | 0.79 | 20.07 | 66.64 | 21.68 | 77.03 |
| 18 | Liu 9-6 | 12.68 | 72.33 | 14.99 | 0.00 | 13.13 | 74.37 | 20.88 | 78.56 |
| 19 | Celebrate 6 sides | 9.42 | 79.62 | 10.96 | 1.07 | 8.60 | 81.30 | 25.20 | 72.61 |
| 20 | 29 sides of new celebrating | 26.87 | 59.47 | 13.66 | 0.97 | 12.07 | 60.17 | 30.79 | 62.21 |
| 21 | The new 65-84 of text | 12.00 | 72.94 | 15.06 | 0.43 | 13.13 | 74.69 | 27.88 | 68.27 |
| 22 | Defend 355-2 | 9.73 | 83.39 | 6.88 | 1.27 | 4.26 | 85.16 | 25.30 | 61.35 |
| 23 | The side horse 26- 4 | 15.73 | 62.96 | 21.31 | 0.00 | 20.02 | 64.32 | 21.44 | 77.64 |
| 24 | Xu 14-24 | 21.45 | 71.57 | 6.99 | 0.35 | 4.82 | 73.46 | 21.11 | 76.66 |
| 25 | Horse 12-28 | 16.02 | 82.66 | 1.32 | 0.69 | 1.43 | 85.01 | 24.33 | 71.14 |
| 26 | Defend 360-27 | 13.27 | 80.04 | 6.69 | 0.34 | 4.22 | 82.42 | 19.24 | 72.36 |
| 27 | Literary 65-81 | 10.58 | 75.61 | 13.81 | 0.34 | 11.75 | 77.61 | 25.88 | 69.36 |
| 28 | Hu 68-2 | 10.00 | 79.69 | 10.31 | 1.45 | 7.89 | 81.07 | 19.32 | 76.73 |
| 29 | Bridge 58-5 | 11.35 | 61.85 | 26.79 | 0.45 | 25.65 | 62.74 | 22.22 | 77.67 |
| 30 | Text 164 | 13.79 | 83.41 | 2.80 | 0.59 | 0.07 | 85.84 | 29.75 | 60.97 |
| 31 | Bright 239 side | 13.70 | 61.36 | 24.94 | 0.28 | 23.78 | 62.37 | 26.16 | 66.80 |
| 32 | Spring 9-24 | 8.72 | 73.67 | 17.61 | 0.90 | 15.67 | 75.06 | 18.97 | 77.49 |
| 33 | Defend 305-61 | 9.68 | 69.34 | 20.98 | 0.75 | 19.31 | 70.55 | 21.10 | 72.98 |
Oil sources identification plate is established according to the data of table 4, comprising: with methyl carbon relative amount f in saturated hydrocarbonsCH3, saturated hydrocarbons
Methylene carbon relative amount fCH2With methine carbon relative amount f in saturated hydrocarbonsCHThe opposite carbon content of saturated hydrocarbons established for three sides
Triangle plate (Fig. 4), with three-level carbon content fCtWith saturation γ hydrogen total content f of methyl hydrogen and cycloalkaneHγThe f that relationship is establishedCt-
fHγPlate (Fig. 5), with second level and level Four total carbon fCsqWith the position the β hydrogen total content f of saturation methine hydrogen and cyclic hydrocarbonHβRelationship is built
Vertical fCsq-fHβPlate (Fig. 6).
According to Fig. 4-Fig. 6, oil sources is recognized, identification result is as shown in table 5.Recognize specific steps are as follows: in saturated hydrocarbons
In opposite carbon content axonometric projection version, work as fCH2When > 75%, then judge that oil sources may be algae, it is on the contrary then judge that oil sources may be high
Equal plants；In fCt-fHγIn plate, work as fCt< 30% and fHγWhen < 23%, then judge that oil sources may be higher plant, it is on the contrary then sentence
Oil-break source may be algae；In fCsq-fHβIn plate, work as fCsp< 75% and fHβWhen > 60%, then judge that oil sources may be high plant
Object, it is on the contrary then judge that oil sources may be algae；When the conclusion obtained according to 3 kinds of oil sources identification plates is consistent, it is determined that identification
As a result, if inconsistent, using the judgement conclusion more than frequency of occurrence as identification result.By above-mentioned identification result as it can be seen that according to east
Dong- pu Depression can be divided into northern territory and the southern areas region Liang great by the oil sources of Pu recess terrestrial facies complexity crude oil, wherein north
Hydrocarbon matrix is preferable on the whole in portion area, and oil sources is algae, and hydrocarbon matrix is poor on the whole for southern areas, and oil sources is high plant
Object.The identification result matches with the newest exploration results in this area.It can be seen that above-mentioned terrestrial facies provided by the invention are complicated former
The oil sources discrimination method of oil, can rapidly and efficiently recognize the oil sources of terrestrial facies complexity crude oil, and identification result accurately may be used
It leans on.
The oil sources identification result of 33 crude oil samples of 5 Dong- pu Depression of table
Claims (5)
1. a kind of oil sources discrimination method of terrestrial facies complexity crude oil, which comprises the steps of:
Sample acquisition and pretreatment: acquisition research area's crude oil sample removes the solid impurity and water in crude oil sample；
Structural analysis: carrying out magnetic resonance detection to pretreated crude oil sample, obtains carbon spectrum and hydrogen spectrum；
Oil sources identification: it is composed according to obtained carbon spectrum and hydrogen, identifies the functional group of indication oil source characteristics, and determined for indication oil
The microstructure parameter of source feature；According to obtained carbon spectrum and hydrogen spectrum, the numerical value of above-mentioned microstructure parameter is calculated, and establish oil
Source recognizes plate, recognizes to oil sources.
2. the oil sources discrimination method of terrestrial facies complexity crude oil according to claim 1, which is characterized in that the indication oil sources is special
The functional group of sign include: carbon spectrum in, chemical displacement value 150-170ppm substituted aromatic carbon, in the bridge of 130-150ppm
Carbon, in the aromatic carbon of 100-130ppm, in the carboxyl carbon of 170-182ppm, in double carbonyl carbons of 180-190ppm, in 195-
The aldehyde radical carbon of 205ppm, in the carbonyl carbon of 202-220ppm, in the alkene carbon of 60-100ppm, in the methyl carbon of 9-21.39ppm,
In the mesomethylene carbon of 21.39-36.15ppm, in the methine carbon of 36.15-60ppm；In hydrogen spectrum, chemical displacement value is in 0.5-
γ hydrogen of saturation methyl hydrogen and cycloalkane of 1.00ppm, 1.00-1.95ppm saturation methine hydrogen and cyclic hydrocarbon the position β hydrogen,
In α hydrogen of aromatic ring of 1.95-4.00ppm, in the alkene hydrogen of 4.50-6.00ppm, in the fragrant hydrogen of 7.05-9.20ppm.
3. the oil sources discrimination method of terrestrial facies complexity crude oil according to claim 1 or 2, which is characterized in that the chemistry knot
Structure parameter includes: methyl carbon relative amount f in saturated hydrocarbonsCH3, saturated hydrocarbons methylene carbon relative amount fCH2, time first in saturated hydrocarbons
Base carbon relative amount fCH, three-level carbon content fCt, second level and level Four total carbon fCsq, saturation methyl hydrogen and γ hydrogen of cycloalkane it is total
Content fHγ, saturation methine hydrogen and cyclic hydrocarbon the position β hydrogen total content fHβ；The oil sources identification plate includes: with methyl in saturated hydrocarbons
Carbon relative amount fCH3, saturated hydrocarbons methylene carbon relative amount fCH2With methine carbon relative amount f in saturated hydrocarbonsCHIt is built for three sides
Vertical saturated hydrocarbons is with respect to carbon content axonometric projection version, with three-level carbon content fCtWith saturation γ hydrogen total contents of methyl hydrogen and cycloalkane
fHγThe f that relationship is establishedCt-fHγPlate, with second level and level Four total carbon fCsqIt is total with the position the β hydrogen of saturation methine hydrogen and cyclic hydrocarbon
Content fHβThe f that relationship is establishedCsq-fHβPlate.
4. the oil sources discrimination method of terrestrial facies complexity crude oil according to claim 3, which is characterized in that utilize oil sources identification figure
The specific steps that version recognizes oil sources are as follows: in saturated hydrocarbons with respect in carbon content axonometric projection version, work as fCH2When > 75%, then judge
Oil sources may be algae, on the contrary then judge that oil sources may be higher plant；In fCt-fHγIn plate, work as fCt< 30% and fHγ<
When 23%, then judge that oil sources may be higher plant, it is on the contrary then judge that oil sources may be algae；In fCsq-fHβIn plate, work as fCsp
< 75% and fHβWhen > 60%, then judge that oil sources may be higher plant, it is on the contrary then judge that oil sources may be algae；When according to 3 kinds
When the conclusion that oil sources identification plate obtains is consistent, it is determined that identification result, if inconsistent, with the judgement conclusion more than frequency of occurrence
As identification result.
5. the oil sources discrimination method of terrestrial facies complexity crude oil according to claim 1, it is characterised in that: the nuclear magnetic resonance inspection
Survey uses deuterated chloroform for solvent, and tetramethylsilane is internal standard compound；The detection parameters setting of carbon spectrum are as follows: scanning times 3000
Secondary, spectrum width 249ppm, the acquisition time is 0.37s；The detection parameters setting of hydrogen spectrum are as follows: scanning times are 32 times, and spectrum width is
20ppm, acquisition time are 2.32s.
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