CN103615243A - Method for judging oil types by utilizing geochemical derivative parameter plates - Google Patents
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Abstract
A method for judging oil types by utilizing geochemical derivative parameter plates comprises the following specific steps of obtaining geochemical derivative parameters according to geochemical logging pyrolysis data, wherein the geochemical derivative parameters include a main peak carbon number, a chromatography derivative parameter and a pyrolysis derivative parameter; building a judgment plate of the main peak carbon number and the chromatography derivative parameter, a judgment plate of the pyrolysis derivative parameter and the chromatography derivative parameter, and a judgment plate of the main peak carbon number and the pyrolysis derivative parameter according to the geochemical derivative parameters; primarily judging the oil types by utilizing the chromatographic peak pattern characteristic of hydrocarbon components; casting points in the plate using the obtained derivative parameters, and finally determining the oil types. The pyrolysis parameter of geochemical logging and the parameters of the hydrocarbon components of chromatographic analysis are calculated, correlation plates are built according to the obtained derivative parameters and known oil types, then the oil types of a reservoir stratum are judged according to the derivative parameters calculated by the geochemical parameters of an oiliness reservoir stratum, and a hydrocarbon reservoir can be evaluated objectively and accurately.
Description
Technical field
Patent of the present invention relates to a kind of method that well logging engineering field in oil exploration industry pit shaft technology judges oily type, can be used for the judgement of oil in oil-containing reservoir, and then objective, evaluate oil-gas Layer exactly, in time for the formulation of selecting, test measure of logging method in follow-up wellbore operations and the selection of testing scheme provide basic data.
Background technology
Improve the oil-gas Layer recognition accuracy in well logging stage, the very first time that can open stratum at drill bit is identified oil-gas Layer fast and accurately.Judge that the timely decision-making that oily type can be other follow-up exploration operations such as well logging, test, comprehensive geology research provides foundation; For subsequent job wins abundant operation time.Thereby saving operating cost, improves exploration operation efficiency.
But utilizing logging means identification, evaluating oil-gas Layer is the technical barrier of mud logging operation always.The evaluation of carrying out oil-gas Layer of well logging stage is subject to the impact of factors, determines that the principal element of oil-gas Layer quality is " oil " and " layer " two aspects.So-called " oil " refers to the characteristic of crude oil, mainly comprises the weight of crude property, the mobility of crude oil, the namely physical index such as the density of crude oil, viscosity; " layer " refers to the characteristic of reservoir, i.e. the index such as the porosity type of reservoir, degree of porosity, permeability, oil saturation and strata pressure.Therefore, identify the prerequisite that oily weight becomes accurate evaluation oil-gas Layer.
The oily type of judgement mainly contains following several method at present:
1. utilize landwaste, the wall heart in kind, with visually observing color, oil-containing distribution situation, fluorescence containing oil samples, drip photoluminescence situation and judge.This determination methods is subject to the impact of people's subjective judgement and experience ability and has relatively large deviation.
2. utilize gas detection logging, with the gas component of obtaining, analyze.This determination methods is only analyzed the light hydrocarbon component in oil, and obtaining information is insufficient, is not enough to represent that the component of oil in stratum forms.
3. utilize quantitative fluorescent log data to carry out oil judgement
Under UV-irradiation, the light emitted wavelength of hydrocarbons in sample, has reflected the weight of crude oil.This method is that the regularity with emission wavelength reflects oily weight indirectly, directly extracts the more direct of hydrocarbon component unlike pyrolysis, chromatogram from sample, more can reflect oily situation in rock stratum.
4. utilize groundization parameter judgement oil, still rest on utilization and be subject to several single indexs such as PS, TPI that various factors is larger, main peak carbon simply to judge the stage at present.Precision is high, external environment affects little chromatographic data and derivative parameter could not make full use of.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of utilization and change the method that derivative parameter plate judges oily type, by each hydrocarbon component parameter to the pyrolysis parameters of rock of geochemical logging, chromatography, calculate, with the derivative parameter and the known oily type that draw, set up correlation plate, and then according to oil-containing reservoir change calculation of parameter derivative parameter reservoir oil is judged, be able to objective, evaluate oil-gas Layer exactly.
A kind of change of the present invention derives the method that parameter plate judges oily type with utilizing, it is characterized in that, comprise following concrete steps: according to geochemical logging pyrolysis data, change the step of derivative parameter with asking for, wherein change derivative parameter and comprise main peak carbon number, chromatographic derivative parameter, the derivative parameter of pyrolysis; Base areaization derives parameter, sets up the step of main peak carbon number and chromatographic derivative parameter judgement plate, the derivative parameter of pyrolysis and chromatographic derivative parameter judgement plate, main peak carbon number and the derivative parameter of pyrolysis; According to the chromatographic peak type feature of hydrocarbon component, tentatively judge the step of oily type; With the derivative parameter cultellation in plate that calculates gained, finally determine the step of oily type.
Wherein, the step of changing derivative parameter specifically comprises with asking for: the step of asking for chromatogram main peak carbon number: according to reservoir rock chromatography hydrocarbon component data, the carbon number of the n-alkane of reading quality mark maximum; Ask for chromatographic derivative parameters C
21 -/ ∑ C
22 +step: each carbon number peak value of chromatography gained calculates C after processing and reading
21each hydrocarbon component relative amount summation and C in the past
22the ratio of each hydrocarbon component relative amount summation, obtains chromatographic derivative parameter later; Ask for the derivative parameter (S of pyrolysis
0+ S
1)/S
2step: the S that utilizes reservoir geochemical pyrolysis to obtain
0, S
1, S
2parameter is calculated, and obtains the derivative parameter of pyrolysis.
Wherein, set up main peak carbon number and chromatographic derivative parameter and judge that plate comprises following concrete steps: Selecting All Parameters is chromatogram main peak carbon number and chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +; Plate abscissa is chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +, adopting logarithmic scale, meter full scale is between 0.05～50; Ordinate is main peak carbon number, adopts linear graduation, and meter full scale is between 0～50; The a large amount of loose some regularities of distribution of statistics are determined oil boundary Trendline, and wherein mink cell focus is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 0.05～1.1, main peak carbon number is in 26～40 scopes; Middle matter oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 0.2～2.2, main peak carbon number is in 17～25 scopes; Light oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 1.1～50, main peak carbon number is in 10～16 scopes.
Wherein, set up the derivative parameter of pyrolysis and chromatographic derivative parameter and judge that plate comprises following concrete steps: participation in the election peek is the derivative parameter (S of pyrolysis
0+ S
1)/S
2with chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +; Plate abscissa is chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +adopt logarithmic scale, meter full scale is between 0.05～50; Ordinate is the derivative parameter (S of pyrolysis
0+ S
1)/S
2, adopting logarithmic scale, meter full scale is between 0.05～50; The a large amount of loose some regularities of distribution of statistics, determine boundary Trendline, and wherein mink cell focus is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 0.05～1.1, (S
0+ S
1)/S
2parameter in 0.05～1.2 scope, i.e. Trendline y=0.2486x on plate
-3.918left region; Light oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 1.1～50, (S
0+ S
1)/S
2parameter in 2.0～50 scopes, i.e. Trendline y=12.04x on plate
-3.728right-hand region; Middle matter oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 0.2～2.2, (S
0+ S
1)/S
2parameter in 1.0～3.5 scopes, i.e. region between two Trendline on plate.
Wherein, set up the derivative parameter judgement of main peak carbon number and pyrolysis plate and comprise following concrete steps: Selecting All Parameters is the derivative parameter (S of chromatogram main peak carbon number and pyrolysis
0+ S
1)/S
2; Plate abscissa (S
0+ S
1)/S
2adopt logarithmic scale, meter full scale is between 0.05～50; Ordinate main peak carbon number adopts linear graduation, and scope is between 0～50; The a large amount of loose point of statistics regularities of distribution, determine boundary Trendline, wherein heavy oil content roughly cloth at (S
0+ S
1)/S
2parameter between 0.05～1.2, main peak carbon number in 26～40 scopes, i.e. Trendline y=2.1429x+23.493 upper area on plate; Light oil is roughly distributed in (S
0+ S
1)/S
2parameter between 2.0～50, main peak carbon number in 10～16 scopes, i.e. Trendline y=1.1154x+12.273 lower zone on plate; Middle matter oil is roughly distributed in (S
0+ S
1)/S
2parameter between 1.0～3.5, main peak carbon number in 17～25 scopes, i.e. region between two Trendline on plate.
In addition, in the oily type step of preliminary judgement, if the obvious component of nothing peak in chromatography collection of illustrative plates is directly judged as mink cell focus; If can analyze n-alkane component peak in chromatography collection of illustrative plates, adopt plate to carry out oil judgement.
In addition, according to cultellation region, determine oily type, if three plate conclusions are identical, without demur in three oil judgement plates; If have two plate conclusions identical, be as the criterion with two same conclusions; If three plates do not draw same conclusions, with ∑ C
21 -/ ∑ C
22 +reach a conclusion and be as the criterion with main peak carbon number oil judgement plate.
The present invention changes the method that derivative parameter plate judges oily type with utilizing, by each hydrocarbon component parameter to the pyrolysis parameters of rock of geochemical logging, chromatography, calculate, with the derivative parameter and the known oily type that draw, set up correlation plate, and then according to oil-containing reservoir change calculation of parameter derivative parameter reservoir oil is judged, be able to objective, evaluate oil-gas Layer exactly.The present invention can be in time provides scientific basis for the formulation of selecting, test measure of logging method in follow-up wellbore operations and the selection of testing scheme.
Accompanying drawing explanation
Fig. 1 is FB(flow block) of the present invention;
Fig. 2 is main peak carbon number and chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +oil judgement plate;
Fig. 3 is the derivative parameter (S of pyrolysis
0+ S
1)/S
2with chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +oil judgement plate:
Fig. 4 is the derivative parameter (S of main peak carbon number and pyrolysis
0+ S
1)/S
2oil judgement plate.
The specific embodiment
The object of the invention is the state of the art for current oil judgement, aim to provide and a kind ofly can judge more exactly oily method, and then improve the accuracy rate of oil-gas Layer identification and evaluation.The pyrolysis of geochemical logging, chromatographic technique can form with molecular level precision analysis the content of all kinds of hydrocarbon components of oil.By hydrocarbon component, contain quantitative analysis, oily type is judged, particularly the oil judgement in tight sand and unconventional oil-gas Layer has uniqueness and irreplaceability, can improve the oil and gas zone evaluation accuracy in well logging stage.
Lot of experimental data shows, within the scope of the hydro carbons that can detect at the chromatographic technique of geochemical logging, light oil main peak carbon location is forward, is distributed in nC
10-nC
16between, carbon number range is between nC
10-nC
28between; Middle matter oil main peak carbon location is distributed in middle part, is distributed in nC
17-nC
25between, carbon number range is between nC
10-nC
35between, ∑ C
21 -/ ∑ C
22 +ratio is less than light crude oil; After mink cell focus main peak carbon location leans on, be distributed in nC
25after, carbon number range is between nC
15-nC
40between, ∑ C
21 -/ ∑ C
22 +ratio is less than middle matter crude oil.Rock geochemical pyrolysis parameter S
0, S
1, S
2also representing respectively the hydrocarbon component content of different carbon numbers in crude oil, S
0+ S
1represent lightweight and middle matter hydrocarbon component content in crude oil; S
2represent heavy crude, colloid, bitum hydrocarbon component content in crude oil.Therefore, (S
0+ S
1)/S
2ratio size can reflect oily weight relation.
Make full use of the pyrolysis data of geochemical logging, especially the derivative parameter ∑ C in chromatogram data
21 -/ ∑ C
22 +, be subject to artificial, such environmental effects is little, be necessary fully to excavate to improve the using value of chromatographic parameter.
Around main peak carbon number, chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +with the derivative parameter (S of pyrolysis
0+ S
1)/S
2three derivative parameters, have comprehensively set up following oily determination methods.Specifically be summarized as three kinds of oil judgement plates:
Main peak carbon number and chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +oil judgement plate;
Pyrolysis derives parameter (S
0+ S
1)/S
2with chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +oil judgement plate;
Main peak carbon number and pyrolysis derive parameter (S
0+ S
1)/S
2oil judgement plate.
Above-mentioned three plates can be used alone, in order to the judgement of oily type; Three plates are verified mutually, complement one another.
Implementation of the present invention is, utilizes groundization to derive the method that parameter plate judges crude property type, and concrete steps are as follows:
1, change derivative parameter with asking for
(1) ask for chromatogram main peak carbon number
1. adopt gas chromatography analysis method, appropriate reservoir sample is directly placed in to instrument pyrolysis oven and carries out chromatography.Require 340 ℃ of injector temperatures, 310 ℃ of FID temperature, 100 ℃ of initial column temperatures, with 10 ℃/min temperature programming to 300 ℃, constant temperature 25min.This process is done carrier gas with nitrogen, flow velocity 41.5ml/min, and hydrogen is done combustion gas, and flow velocity is 40ml/min, and air is done combustion-supporting gas and power gas, and flow velocity is 300ml/min, and split ratio is 1: 60, and tail blows with nitrogen, and flow velocity is 25ml/min.
2. apply this analytical method and can obtain C
8～C
37the relative percentage composition of n-alkane, pristane and phytane chromatographic peak and each component of left and right, therefrom the carbon number of the n-alkane of reading quality mark maximum is main peak carbon number.
(2) ask for chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +
After each carbon number peak value identification of chromatography gained is read, C
21each hydrocarbon component relative amount summation and C in the past
22the ratio of each hydrocarbon component relative amount summation, obtains derivative parameter ∑ C later
21 -/ ∑ C
22 +=(nC
10+ nC
11+ ... nC
21)/(nC
22+ nC
23+ ... nC
40).
(3) ask for the derivative parameter (S of pyrolysis
0+ S
1)/S
2
1. reservoir method for pyrolysis is to choose 0.1g sample (rock core, landwaste or sidewall coring) to put into pyrolysis oven, and logical nitrogen is heated to 90 ℃ and constant temperature 2min, measures C
7the content of gaseous hydrocarbon in the past obtains S
0value; Continue to be heated to 300 ℃ and constant temperature 3min, make the C of crude oil
8-C
35cut vaporize and measure its content and obtain S
1value; Then from 300 ℃ of heating rate temperature programmings to 600 with 50 ℃/min ℃ constant temperature 1min, make in crude oil in, heavy component and colloid, asphalitine pyrolysis, vaporization its content of quantitative assay obtains S
2value.
2. the S that utilizes reservoir geochemical pyrolysis to obtain
0, S
1, S
2parameter is calculated, and obtains derivative parameter (S
0+ S
1)/S
2.
Obtained derivative parameter is carried out preferably, sorted out, form database; According to known oily type, set up the judgement plate of changing derivative parameter and oily type.
2, set up judgement plate
(1) set up main peak carbon number and chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +oil judgement plate.
1. choose chromatogram main peak carbon number and derivative parameter ∑ C
21 -/ ∑ C
22 +.
2. as Fig. 2, plate abscissa is ∑ C
21 -/ ∑ C
22 +, adopting logarithmic scale, meter full scale is between 0.05～50; Ordinate is main peak carbon number, adopts linear graduation, and meter full scale is between 0～50.The a large amount of loose some regularities of distribution of statistics are determined oil boundary Trendline.Mink cell focus is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 0.05～1.1, main peak carbon number is in 26～40 scopes; Middle matter oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 0.2～2.2, main peak carbon number is in 17～25 scopes; Light oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 1.1～50, main peak carbon number is in 10～16 scopes.
(2) set up the derivative parameter (S of pyrolysis
0+ S
1)/S
2with chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +oil judgement plate.
1. choose the derivative parameter (S of pyrolysis
0+ S
1)/S
2with chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +.
2. as Fig. 3, plate abscissa is ∑ C
21 -/ ∑ C
22 +adopt logarithmic scale, meter full scale is between 0.05～50; Ordinate (S
0+ S
1)/S
2adopt logarithmic scale, meter full scale is between 0.05～50.The a large amount of loose some regularities of distribution of statistics, determine boundary Trendline.Mink cell focus is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 0.05～1.1, (S
0+ S
1)/S
2parameter in 0.05～1.2 scope, i.e. Trendline y=0.2486x on plate
-3.918left region; Light oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 1.1～50, (S
0+ S
1)/S
2parameter in 2.0～50 scopes, i.e. Trendline y=12.04x on plate
-3.728right-hand region; Middle matter oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 0.2～2.2, (S
0+ S
1)/S
2parameter is in 1.0～3.5 scopes.Region between two Trendline of plate.
(3) set up the derivative parameter (S of main peak carbon number and pyrolysis
0+ S
1)/S
2oil judgement plate
1. Selecting All Parameters is the derivative parameter (S of chromatogram main peak carbon number and pyrolysis
0+ S
1)/S
2.
2. as Fig. 4, plate abscissa (S
0+ S
1)/S
2adopt logarithmic scale, meter full scale is between 0.05～50; Ordinate main peak carbon number adopts linear graduation, and scope is between 0～50.The a large amount of loose some regularities of distribution of statistics, determine boundary Trendline.Mink cell focus is roughly distributed in (S
0+ S
1)/S
2parameter between 0.05～1.2, main peak carbon number in 26～40 scopes, i.e. Trendline y=2.1429x+23.493 upper area on plate; Light oil is roughly distributed in (S
0+ S
1)/S
2parameter between 2.0～50, main peak carbon number in 10～16 scopes, i.e. Trendline y=1.1154x+12.273 lower zone on plate; Middle matter oil is roughly distributed in (S
0+ S
1)/S
2parameter between 1.0～3.5, main peak carbon number is in 17～25 scopes.Region between two Trendline of plate.
In above plate, oily type division is the classification of crude oil standard of the 12 World Petroleum Congress (WPC) regulation of reference:
Light oil: under 20 ℃ of conditions of temperature, oil density < 0.8661g/cm
3.
Middle matter oil: under 20 ℃ of conditions of temperature, oil density>=0.8661g/cm
3～< 0.9162g/cm
3between.
Mink cell focus: under 20 ℃ of conditions of temperature, oil density>=0.9162g/cm
3～< 0.9968g/cm
3between.
3, the chromatographic peak type feature according to hydrocarbon component judges oily type
(1) if the factor impacts such as crude oil is oxidated, biodegradation without obvious component peak, are directly judged as mink cell focus in chromatography collection of illustrative plates.
(2), if can analyze n-alkane component peak in chromatography collection of illustrative plates, adopt plate to carry out oil judgement.
4, with the derivative parameter cultellation on plate that calculates gained, determine oily type
According to cultellation region, determine oily type.Three plates can be used alone, and directly in order to judge oily type, between different plates, checking mutually, complements one another.If three plate conclusions are identical, without demur in three oil judgement plates; If have two plate conclusions identical, be as the criterion with two same conclusions; If three plates do not draw same conclusions, through lot of experimental data, think with ∑ C
21 -/ ∑ C
22 +with main peak carbon number oil judgement plate reach a conclusion be as the criterion more suitable.
5, output judged result
The plate pattern that provides oily type and reach a conclusion.
The present invention takes full advantage of pyrolysis, chromatographic data, can judge in time, accurately oily type, and then improves oil and gas zone evaluation precision, to follow-up logging method selection, the definite foundation that provides of testing scheme.
The present invention in west of Liaoning of Bohai Bay Oil, Bohai Sea, 5 different petroleum generative depressions such as HUANGHE ESTUARY, in the individual layer of 36 different layers positions, apply, oily type coincidence rate is 94.4%.Contrast and improve 11.1% with normally used main peak carbon method, there is unique technical advantage and good effect.
In Bohai Bay Oil application, show, utilize the derivative parameter plate of groundization to judge that the method for oily type caves in difference, under different oil sources conditions, still have very high judgement coincidence rate.The method is not subject to the impact of the difference conditions such as regional location, depression, oil sources, the oily type of chance that judgement is bored that still can be promptly and accurately in the exploration operation of new area prospect pit, exploration well, and also the new district exploration phase is wished understanding in time most just for this.
With reference to Fig. 1, the present invention obtains reflecting oily S by the pyrolysis analysis of geochemical logging
0, S
1, S
2be worth, by chromatography, obtain the main peak carbon number of each hydrocarbon component.Through processing, calculate (S
0+ S
1)/S
2, ∑ C
21 -/ ∑ C
22 +with the derivative parameters such as main peak carbon number, integrated decryption storehouse.If without obvious component peak, be directly judged as mink cell focus in chromatography collection of illustrative plates.If can analyze n-alkane component peak in chromatography collection of illustrative plates,, by the derivative parameter substitution interpretation chart calculating, according to data drop point region, draw oily type conclusion.
The present invention is described in detail in detail with reference to the accompanying drawings, with instantiation, introduces using method of the present invention, displaying the present invention cave in difference, the effect under different oil sources conditions.
1, the present invention is in the application of Liaoxi Sag XX well.
XX well is shown in oil/gas show at 2055-2070m well logging, calculates geochemical logging parameter, draws following derivative parameter: (S
0+ S
1)/S
2=7.19; ∑ C
21 -/ ∑ C
22 +=1.69, main peak carbon number is 12; Adopt plate cultellation, on three kinds of plates, cultellation all drops on light oil region, and cultellation result is as Fig. 2～4.
The density that this layer of formation testing obtains crude oil sample is 0.7577g/cm
3, with reference to the classification of crude oil standard of the 12 World Petroleum Congress (WPC) regulation, belong to light oil; Three kinds of chart interpretations are light oil; Formation testing oil conclusion and chart interpretation conclusion are coincide.
2, the present invention is in the application of Laizhouwan sag YY well
YY well 2569-2586m well logging is shown in oil/gas show, calculates geochemical logging parameter, draws following derivative parameter: (S
0+ S
1)/S
2=0.72; ∑ C
21 -/ ∑ C
22 +=0.21; Main peak carbon number is 25; Adopt plate cultellation, on three kinds of plates, cultellation drops on respectively middle matter～heavy region intersection, or heavy region (as Fig. 2～4).Comprehensive three kinds of plate conclusions are middle matter oil.
The density that this layer of formation testing obtains crude oil sample is 0.8889g/cm
3, the classification of crude oil standard of stipulating with reference to the 12 World Petroleum Congress (WPC) belongs to middle matter and lays particular stress on; Chart interpretation conclusion and formation testing oil conclusion are coincide.
3, the present invention is in the application of HUANGHE ESTUARY depression ZZ well
ZZ well 1564-1574m well logging is shown in oil/gas show, calculates geochemical logging parameter, draws following derivative parameter: (S
0+ S
1)/S
2=0.38; ∑ C
21 -/ ∑ C
22 +=0.42; Main peak carbon number is 31; Adopt plate cultellation, on three kinds of plates, cultellation all drops on mink cell focus region (cultellation result is as Fig. 2～4).
The density that this layer of formation testing obtains crude oil sample is 0.9510g/cm
3, with reference to the classification of crude oil standard oil of the 12 World Petroleum Congress (WPC) regulation matter oil of attaching most importance to; Three kinds of chart interpretations (seeing attached list 4) are mink cell focus; Formation testing oil conclusion and chart interpretation conclusion are coincide.
By specific embodiment, the present invention is further described above; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; one of ordinary skilled in the art, reading the various modifications of after this manual, above-described embodiment being made, belongs to the scope that the present invention protects.
Claims (7)
1. change the method that derivative parameter plate judges oily type with utilizing, it is characterized in that, comprise following concrete steps:
According to geochemical logging pyrolysis data, change the step of derivative parameter with asking for, wherein change derivative parameter and comprise main peak carbon number, chromatographic derivative parameter, the derivative parameter of pyrolysis;
Base areaization derives parameter, sets up the step of main peak carbon number and chromatographic derivative parameter judgement plate, the derivative parameter of pyrolysis and chromatographic derivative parameter judgement plate, main peak carbon number and the derivative parameter of pyrolysis;
According to the chromatographic peak type feature of hydrocarbon component, tentatively judge the step of oily type;
With the derivative parameter cultellation in plate that calculates gained, finally determine the step of oily type.
2. the derivative parameter plate of utilization groundization according to claim 1 judges the method for oily type, it is characterized in that, the step of changing derivative parameter specifically comprises with asking for:
Ask for the step of chromatogram main peak carbon number: according to reservoir rock chromatography hydrocarbon component data, the carbon number of the n-alkane of reading quality mark maximum;
Ask for chromatographic derivative parameters C
21 -/ ∑ C
22 +step: each carbon number peak value of chromatography gained calculates C after processing and reading
21each hydrocarbon component relative amount summation and C in the past
22the ratio of each hydrocarbon component relative amount summation, obtains chromatographic derivative parameter later;
Ask for the derivative parameter (S of pyrolysis
0+ S
1)/S
2step: the S that utilizes reservoir geochemical pyrolysis to obtain
0, S
1, S
2parameter is calculated, and obtains the derivative parameter of pyrolysis.
3. the derivative parameter plate of utilization groundization according to claim 1 judges the method for oily type, it is characterized in that, sets up main peak carbon number and chromatographic derivative parameter and judges that plate comprises following concrete steps:
Selecting All Parameters is chromatogram main peak carbon number and chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +;
Plate abscissa is chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +, adopting logarithmic scale, meter full scale is between 0.05～50; Ordinate is main peak carbon number, adopts linear graduation, and meter full scale is between 0～50;
The a large amount of loose some regularities of distribution of statistics are determined oil boundary Trendline, and wherein mink cell focus is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 0.05～1.1, main peak carbon number is in 26～40 scopes; Middle matter oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 0.2～2.2, main peak carbon number is in 17～25 scopes; Light oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter between 1.1～50, main peak carbon number is in 10～16 scopes.
4. the derivative parameter plate of utilization groundization according to claim 1 judges the method for oily type, it is characterized in that, sets up the derivative parameter of pyrolysis and chromatographic derivative parameter and judges that plate comprises following concrete steps:
Participation in the election peek is the derivative parameter (S of pyrolysis
0+ S
1)/S
2with chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +;
Plate abscissa is chromatographic derivative parameter ∑ C
21 -/ ∑ C
22 +adopt logarithmic scale, meter full scale is between 0.05～50; Ordinate is the derivative parameter (S of pyrolysis
0+ S
1)/S
2, adopting logarithmic scale, meter full scale is between 0.05～50;
The a large amount of loose some regularities of distribution of statistics, determine boundary Trendline, and wherein mink cell focus is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 0.05～1.1, (S
0+ S
1)/S
2parameter in 0.05～1.2 scope, i.e. Trendline y=0.2486x on plate
-3.918left region; Light oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 1.1～50, (S
0+ S
1)/S
2parameter in 2.0～50 scopes, i.e. Trendline y=12.04x on plate
-3.728right-hand region; Middle matter oil is roughly distributed in ∑ C
21 -/ ∑ C
22 +parameter is between 0.2～2.2, (S
0+ S
1)/S
2parameter in 1.0～3.5 scopes, i.e. region between two Trendline on plate.
5. the derivative parameter plate of utilization groundization according to claim 1 judges the method for oily type, it is characterized in that, sets up the derivative parameter judgement of main peak carbon number and pyrolysis plate and comprises following concrete steps:
Selecting All Parameters is the derivative parameter (S of chromatogram main peak carbon number and pyrolysis
0+ S
1)/S
2;
Plate abscissa (S
0+ S
1)/S
2adopt logarithmic scale, meter full scale is between 0.05～50; Ordinate main peak carbon number adopts linear graduation, and scope is between 0～50;
The a large amount of loose point of statistics regularities of distribution, determine boundary Trendline, wherein heavy oil content roughly cloth at (S
0+ S
1)/S
2parameter between 0.05～1.2, main peak carbon number in 26～40 scopes, i.e. Trendline y=2.1429x+23.493 upper area on plate; Light oil is roughly distributed in (S
0+ S
1)/S
2parameter between 2.0～50, main peak carbon number in 10～16 scopes, i.e. Trendline y=1.1154x+12.273 lower zone on plate; Middle matter oil is roughly distributed in (S
0+ S
1)/S
2parameter between 1.0～3.5, main peak carbon number in 17～25 scopes, i.e. region between two Trendline on plate.
6. the derivative parameter plate of utilization groundization according to claim 1 judges the method for oily type, it is characterized in that, comprises following concrete steps:
In the oily type step of preliminary judgement, if the obvious component of nothing peak in chromatography collection of illustrative plates is directly judged as mink cell focus;
If can analyze n-alkane component peak in chromatography collection of illustrative plates, adopt plate to carry out oil judgement.
7. according to claim 3 to 5, change to the utilization described in any one method that derivative parameter plate judges oily type, it is characterized in that, comprise following concrete steps:
According to cultellation region, determine oily type, if three plate conclusions are identical, without demur in three oil judgement plates; If have two plate conclusions identical, be as the criterion with two same conclusions; If three plates do not draw same conclusions, with ∑ C
21 -/ ∑ C
22 +reach a conclusion and be as the criterion with main peak carbon number oil judgement plate.
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