CN101929960A - Method for quantitatively measuring kerogen structure compositions and maturity in hydrocarbon source rock - Google Patents
Method for quantitatively measuring kerogen structure compositions and maturity in hydrocarbon source rock Download PDFInfo
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Abstract
The invention discloses a method for quantitatively measuring kerogen structure compositions and maturity in a hydrocarbon source rock, which comprises the following steps of: pyrolyzing kerogen of the hydrocarbon source rock; detecting and recording a shoulder peak of pyrolyzed hydrocarbon S2; calculating the shoulder peak area and aliphatic chain and alcyl pyrolyzed hydrocarbon amount; calculating the aliphatic chain and alcyl effective carbon FPC, condensed aromatic nucleus effective carbon APC, total effective carbon TPC, and a degradation creep rate D and a hydrogen index HI of the hydrocarbon source rock; and calculating a fat hydrogen index FHI, an aromatic hydrogen index AHI, a fat carbon rate FC, an aromatic carbon rate AC, an ineffective carbon rate AC of the hydrocarbon source rock, and determining the maturity and change regularity of the hydrocarbon source rock by using the kerogen structure compositions. The method can measure a aliphatic chain and alcyl carbon rate, the aromatic carbon rate and the generated hydrocarbon amount of the basic structure compositions of the kerogen, is applied to researching the kerogen structure composition distribution and oil gas generation potential thereof in the hydrocarbon source rock and determining the change of the kerogen structure compositions along with the maturity, and is used for discriminating organic matter types of the hydrocarbon source rock.
Description
Technical field
The present invention relates to a kind of rock pyrolysis quantitative analysis method, the method for kerogen structure composition and degree of ripeness in especially a kind of quantitative measurement hydrocarbon source rock.
Background technology
The formation of oil, rock gas is to be the product of the organic geochemistry conversion of main oil generation matrix with kerogen.Kerogen is the organic condensed polymer that forms in sedimentogeneous rock, and the formation of oil gas is the kerogen result that inner structure is readjusted in new environment, is that kerogen is from the variation of chain structure to the condensed ring structure.Forefathers think to kerogen structure research: kerogen structure is formed and mainly is divided into condensation aromatic ring nuclear part and the side chain and the functional group that are connected on the fragrant nuclear of condensation.
Kerogen is the high insolubles of molecular weight, and its biogenetic derivation difference, its structure are also different, and also constantly changes with its its structure of evolution degree.A.L.Burlingame etc. (1969) propose according to the oxidative degradation data, and kerogen is made up of the polymer substrate that comprises aromatic proton and heteroatomic highly cross-linked saturated fat material.M.Djuricie etc. (1971) are with the alkalinity potassium permanganate step-by-step oxidation green river shale kerogen of degrading, and think that kerogen nuclear is made up of the fatty methylene bridge of the length that is cross-linked with each other, and the bridge chain is connected with the isoprene chain by straight chain.A.Oberlin electron microscopic study kerogen, proposing kerogen is made up of the laminated body of aromatic series sheet, plates are the condensation aromatic ring, have aliphatic chain and various functional group on the plates, Yang Qi etc. study the structure of coal by X-ray diffraction method, think that the basic structure of coal is the condensation fragrance karyonide that has side chain and functional group, humic class kerogen has and the coal similar structures.Qin Kuangzong by aromatic carbon rate and molecular weight correlation method, studies Maoming and the kerogenic average basic structure of Fushun oil shale with measuring kerogenic refractive index, density, element composition.
The patent of relevant kerogen structure composition analysis, be applied physics method such as X-ray diffraction, nuclear magnetic resonance, electron microscope etc. mostly, also useful chemical degradation method, early patent has US Patent5491738 (1996) " X diffraction analysis kerogen structure "; " nuclear magnetic resonance (NMR) is analyzed kerogen to Finland Patent 20030130 (2003); US Patent 5958224 (1999) " kerogen structure and living hydrocarbon relation; US Patent 4299891 (1991) " hydrolysis research kerogen structure feature "; US Patent 4843247 (1989) " ultraviolet spectrum research kerogen structure is formed ".
More than with physics and chemical method shortcoming be can not be accurately quantitatively the kerogenic structure of hydrocarbon source rock form the living hydrocarbon amount of especially can not each structure of quantitative measurement hydrocarbon source rock kerogen forming.
Summary of the invention
The object of the invention provides a kind of direct mensuration hydrocarbon source rock oil gas growing amount (mg hydrocarbon/g rock) and its hydrogen index (HI), and (kerogen structure is formed and the method for degree of ripeness in the quantitative measurement hydrocarbon source rock of mg hydrocarbon/gToc).
The present invention is achieved through the following technical solutions, and comprises the steps:
1) with pyrolysis oven heat hydrocarbon source rock sample evaporation hydro carbons and thermal cracking kerogen wherein, helium is done carrier gas and is measured with flame ionization ditector;
2) press hydrocarbon source rock pyrolysed hydrocarbon S
2Analysis condition, detect and record pyrolysed hydrocarbon S
2, calculate hydrocarbon content S with following formula
2(mg hydrocarbon/g rock);
In the formula: P
Rock-rock sample pyrolysed hydrocarbon peak area;
P
Mark-standard specimen pyrolysed hydrocarbon peak area;
Q
Mark-standard specimen pyrolysed hydrocarbon content, (mg hydrocarbon/g rock);
W
Mark-standard specimen quality, mg;
W
Rock-rock sample quality, mg.
The described analysis condition of step 3) is rock sample constant temperature 3 minutes under 300 ℃ of furnace temperature, and 50 ℃/minute to 600 ℃ constant temperature of temperature programme are 1 minute then.
3) press analysis condition and detect and note down pyrolysed hydrocarbon S
2In acromion, calculate acromion area SA (mg hydrocarbon/g rock) with following formula;
In the formula: the condensation virtue nuclear pyrolysed hydrocarbon amount of SA-acromion representative; Mg hydrocarbon/g rock;
PA-acromion area;
P
Mark-standard specimen pyrolysed hydrocarbon peak area;
Q
Mark-standard specimen pyrolysed hydrocarbon content, (mg hydrocarbon/g rock);
W
Mark-standard specimen quality, mg;
W
Rock-rock sample quality, mg;
The described analysis condition of step 3) is rock sample constant temperature 3 minutes under 480 ℃ of furnace temperature, and 50 ℃/minute to 600 ℃ constant temperature of temperature programme are 1 minute then.
4) be calculated as follows pyrolysed hydrocarbon S
2The fat chain alicyclic ring pyrolysed hydrocarbon amount SF of main peak representative;
SF (mg hydrocarbon/g rock)=S
2-SA ... (3)
In the formula: the fat chain alicyclic ring pyrolysed hydrocarbon amount of SF-main peak representative, mg hydrocarbon/g rock;
S
2-pyrolysed hydrocarbon total amount, mg hydrocarbon/g rock;
The condensation virtue nuclear pyrolysed hydrocarbon amount of SA-acromion representative, mg hydrocarbon/g rock.
5) be calculated as follows the effective carbon APC of effective carbon FPC of fat chain alicyclic ring and condensation virtue nuclear and total effectively carbon TPC:
FPC(％)＝0.083×SF……(4)
APC(％)＝0.075×SA……(5)
TPC(％)＝0.083×S
2……(6)
In the formula: 0.083-fat chain alicyclic ring pyrolysed hydrocarbon (mg hydrocarbon/g rock) is scaled carbon content (%) coefficient;
0.075-condensation virtue nuclear pyrolysed hydrocarbon (mg hydrocarbon/g rock) is scaled carbon content (%) coefficient.
The effective carbon of FPC-fat, %;
The APC-virtue is carbon effectively, %;
The total effectively carbon of TPC-, %;
SF-fat pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
SA-virtue pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
S
2-total pyro lysis temperature hydrocarbon amount, mg hydrocarbon/g rock.
6) be calculated as follows latent rate D of hydrocarbon source rock degraded and hydrogen index (HI) HI;
In the formula: the latent rate of D-degraded, %;
The total effectively carbon of TPC-, %;
The TOC-total organic carbon, %;
The HI-hydrogen index (HI), mg hydrocarbon/g TOC;
S
2-pyrolysed hydrocarbon total amount, mg hydrocarbon/g rock;
7) be calculated as follows hydrocarbon source rock fat hydrogen index (HI) FHI and fragrant hydrogen index (HI) AHI:
In the formula: FHI-fat hydrogen index (HI), mg hydrocarbon/gTOC;
AHI-virtue hydrogen index (HI), mg hydrocarbon/gTOC;
SF-fat chain alicyclic ring pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
SA-virtue nuclear pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
The TOC-total organic carbon, %;
8) be calculated as follows fat carbon rate FC and aromatic carbon rate AC and invalid carbon RC:
RC(％)＝TOC-TPC……(13)
In the formula: the effective carbon of FPC-fat, %;
The APC-virtue is carbon effectively, %;
The TOC-total organic carbon, %;
The total effectively carbon of TPC-, %;
The invalid carbon of RC-, %;
FC-fat carbon rate, %;
AC-aromatic carbon rate, %;
9) form definite hydrocarbon source rock degree of ripeness and Changing Pattern with kerogen structure.
Step 9) determines that the hydrocarbon source rock degree of ripeness is: the kerogenic fat carbon of I class rate FC＞38～69 (%), aromatic carbon rate AC＞31～62 (%) the described composition with kerogen structure; The kerogenic fat carbon of IIA class rate FC＞17～38 (%), aromatic carbon rate AC＞62～83 (%); IIB class kerogen fat carbon rate FC＞8～17 (%), aromatic carbon rate AC＞83～92 (%); The kerogenic fat carbon of III class rate FC＜8 (%), aromatic carbon rate AC＞92 (%) are low ripe hydrocarbon source rock kerogen structure.
Step 9) is described form to determine that with kerogen structure the hydrocarbon source rock degree of ripeness is: and the kerogenic fat hydrogen index (HI) of I class FHI＞420～770 (mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞30～40 (the mg hydrocarbon/gTOC); The kerogenic fat hydrogen index (HI) of IIA class FHI＞175～420 (mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞40～45 (the mg hydrocarbon/gTOC); The kerogenic fat hydrogen index (HI) of IIB class FHI＞60～175 (mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞45～50 (the mg hydrocarbon/gTOC); ((mg hydrocarbon/gTOC) is low ripe hydrocarbon source rock kerogen structure for mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞50 in the kerogenic fat hydrogen index (HI) of III class FHI＜60.
Step 9) is formed definite hydrocarbon source rock degree of ripeness Changing Pattern with kerogen structure: (the mg hydrocarbon/gTOC) rising with degree of ripeness diminishes for fat carbon rate FC (%) and fat hydrogen index (HI) FHI, (the mg hydrocarbon/gTOC) rising with degree of ripeness becomes big for aromatic carbon rate AC (%) and fragrant hydrogen index (HI) AHI, in post-mature stage (Tmax＞500 ℃), fat carbon rate FC (%) and fat hydrogen index (HI) FHI (mg hydrocarbon/gTOC) trends towards zero, and aromatic carbon rate AC (%) and fragrant hydrogen index (HI) AHI (mg hydrocarbon/gTOC) trends towards maximum.
The present invention can distinguish fat chain alicyclic ring carbon rate and aromatic carbon rate and their the living hydrocarbon amount that the kerogenic basic structure of assay determination is formed.Be applicable to and study the distribution of kerogen structure composition and its oil gas generation potentiality in the hydrocarbon source rock, and definite kerogen structure composition is used to differentiate the hydrocarbon source rock organic matter type with the variation of degree of ripeness.
Description of drawings
Fig. 1 I class of the present invention hydrocarbon source rock pyrolysed hydrocarbon S
2Peak collection of illustrative plates acromion various preheat temperature variation diagram;
Fig. 2 II class of the present invention hydrocarbon source rock pyrolysed hydrocarbon S
2Peak collection of illustrative plates acromion various preheat temperature variation diagram;
Fig. 3 III class of the present invention hydrocarbon source rock pyrolysed hydrocarbon S
2Peak collection of illustrative plates acromion various preheat temperature variation diagram.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing.
I class kerogen mainly is made up of aliphatic chain, and polycondensation aromatic proton content is low, and the latent amount of its product hydrocarbon is the highest, based on produce oil; II class kerogen contains more fat chain and alicyclic ring, and the polycondensation aromatic proton is relatively also more, and the latent amount of its product hydrocarbon is lower than I class kerogen; III class kerogen contains a large amount of aromatic structures, and fat chain and alicyclic ring are less, based on anger.
The former analytical approach of rock pyrolysis (Rock-Eval) can only be measured the free hydrocarbon S of hydrocarbon source rock
1(mg hydrocarbon/g rock), pyrolysed hydrocarbon S
2(mg hydrocarbon/g rock) and organic carbon dioxide S
3(mgCO
2/ g rock).The present invention uses the rock pyrolysis analysis principle, after changing its analytical approach, make it the kerogenic fat chain of detection by quantitative hydrocarbon source rock alicyclic ring pyrolysed hydrocarbon amount (mg hydrocarbon/g rock) and condensation virtue nuclear pyrolysed hydrocarbon amount (mg hydrocarbon/g rock), reach each structure of quantitative test kerogen with quick and easy analytical approach and form the purpose of giving birth to the hydrocarbon amount.
Hydrocarbon source rock pyrolysis analysis collection of illustrative plates pyrolysed hydrocarbon S
2The afterbody acromion appears in peak sometimes, the hydrocarbon source rock S that especially degree of ripeness is high
2The peak all has acromion to occur, and degree of ripeness is low and the S of the hydrocarbon source rock that organic matter type is good
2The peak does not have acromion, infers S thus
2The peak acromion is relevant with the kerogen type of hydrocarbon source rock, and relevant with the maturation of source rocks degree.
The present invention is achieved through the following technical solutions, and comprises the steps:
1) heat rock sample with pyrolysis oven, thermal evaporation hydro carbons and thermal cracking kerogen wherein wherein done carrier gas with helium, and gaseous state evaporation hydrocarbon and pyrolysed hydrocarbon are introduced flame ionization ditector mensuration;
2) rock sample constant temperature 3 minutes under 300 ℃ of furnace temperature, 50 ℃/minute to 600 ℃ constant temperature of temperature programme are 1 minute then, detect and record pyrolysed hydrocarbon S
2, calculate its hydrocarbon content (mg hydrocarbon/g rock) by (1) formula with peak area;
3) rock sample constant temperature 3 minutes under 480 ℃ of furnace temperature, 50 ℃/minute to 600 ℃ constant temperature of temperature programme are 1 minute then, detect and record pyrolysed hydrocarbon S
2Acromion, calculate S with peak area by (2) formula
2The virtue nuclear hydrocarbon content SA (mg hydrocarbon/g rock) of acromion representative;
4) calculate pyrolysed hydrocarbon S by (3) formula
2The fat chain alicyclic ring pyrolysed hydrocarbon amount SF (mg hydrocarbon/g rock) of main peak representative;
5) calculate the effective carbon FPC of fat (%) and calculate effectively carbon APC (%) of virtue by (4) formula, and calculate total effectively carbon TPC (%) by (6) formula by (5) formula;
6) calculate dive rate D (%) and calculate hydrogen index (HI) HI (mg hydrocarbon/gTOC) of degraded by (7) formula by (8) formula;
7) (mg hydrocarbon/gTOC) and (10) formula are calculated fragrant hydrogen index (HI) AHI (mg hydrocarbon/gTOC) to calculate fat hydrogen index (HI) FHI by (9) formula;
8) calculate fat carbon rate FC (%) and calculate aromatic carbon rate AC (%) by (11) formula by (12) formula.
9) determine of the variation of the kerogen structure composition of hydrocarbon source rock with the kerogen type.
Described definite hydrocarbon source rock kerogen type is from I class → IIA → IIB → III class, and its fat chain alicyclic ring is by changeable little, and condensation virtue nuclear becomes many by few, shows as I class hydrocarbon source rock fat hydrogen and counts FHI (mg hydrocarbon/gTOC) all maximum with fat carbon rate FC (%).And fragrant hydrogen index (HI) AHI (mg hydrocarbon/gTOC) all minimum with aromatic carbon rate AC (%), III class hydrocarbon source rock is then opposite, and II class hydrocarbon source rock is placed in the middle, and is as shown in table 3:
All kinds of low ripe hydrocarbon source rock kerogen structure component characteristic parameters of table 3
10) determine of the variation of hydrocarbon source rock kerogen structure composition with degree of ripeness (Tmax ℃).
The described variation of determining that all kinds of hydrocarbon source rock kerogen structures are formed with degree of ripeness (Tmax ℃) is: (1) fat carbon rate FC (%) diminishes with the rising of degree of ripeness; (2) aromatic carbon rate AC (%) becomes big with the rising of degree of ripeness; (3) in post-mature stage (Tmax＞500 ℃), fat carbon rate FC (%) trend zero, and aromatic carbon rate AC (%) trend 100%, illustrate post-mature stage fat chain alicyclic ring all cracking give birth to hydrocarbon, only remaining condensation is fragrant to be examined, as shown in table 4.
All kinds of hydrocarbon source rock kerogen structure of table 4 component characteristic parameter is with the variation of degree of ripeness (Tmax ℃)
The present invention preheats 410 or 500 ℃ respectively with all kinds of immature source rocks, and all kinds of hydrocarbon source rocks after will preheating then carry out pyrolysis analysis, investigates pyrolysed hydrocarbon S
2The variation of peak collection of illustrative plates;
(1) with the rising of preheat temperature, pyrolysed hydrocarbon S
2The acromion area at peak is increasing relatively, and the main peak area relatively more and more diminishes;
(2) after 450 ℃ of 470 ℃ of the I class kerogen preheatings, 460 ℃ of II class kerogen preheatings, the preheating of III class kerogen, pyrolysed hydrocarbon S
2The acromion area at peak surpasses the main peak area;
(3) after 480 ℃ of the preheatings, pyrolysed hydrocarbon S
2The main peak complete obiteration at peak only stays acromion.As Fig. 1, Fig. 2, shown in Figure 3.
The present invention's all kinds of hydrocarbon source rock thermal evolution simulated experiment is the result prove:
(1) I class hydrocarbon source rock pyrolysed hydrocarbon S under identical thermal evolution analog temperature
2Peak collection of illustrative plates acromion minimum, and III class hydrocarbon source rock pyrolysed hydrocarbon S
2Peak collection of illustrative plates acromion maximum.Identification is S under identical degree of ripeness
2The size of peak acromion is relevant with the hydrocarbon source rock organic matter type;
(2) S of all kinds of hydrocarbon source rocks
2The relative area of peak acromion becomes big with the rising of thermal evolution analog temperature.Identify S
2The size of peak acromion is relevant with the maturation of source rocks degree, and the high more acromion of degree of ripeness is big relatively more.II class kerogen structure that Tissot and Welte proposed and the tactic pattern after the high evolutionary phase, kerogen is divided into aromatic series encircles component more, saturated rings component, aliphatic chain and heterocycle component, in the evolutionary process from the kerogen to the oil, along with causing the condensation aromatic proton, the increase of taking off alkyl and aromizing increases, at the only remaining condensation virtue of post-mature stage kerogen nuclear.S
2Acromion is that ℃ high-temperature region occurs in pyrolysis＞500, should be the condensation virtue nuclear in post-mature stage.
The present invention is reduced to fat chain alicyclic ring and condensation virtue nuclear two large divisions to the kerogen structure composition, with corresponding rock pyrolysis hydrocarbon S
2The main peak at peak and acromion, the energy of activation of fat chain alicyclic ring is lower, thermal cracking is given birth to hydrocarbon under relatively low temperature, its pyrolysed hydrocarbon peak is the main peak that is in low-temperature space (＜500 ℃), the energy of activation of condensation virtue nuclear is higher, hydrocarbon is given birth in cracking under higher relatively temperature, and its pyrolysed hydrocarbon peak is the acromion that is in high-temperature region (＞500 ℃).
Claims (6)
1. the method for kerogen structure composition and degree of ripeness in the quantitative measurement hydrocarbon source rock is characterized in that: comprise the steps:
1) with pyrolysis oven heat hydrocarbon source rock sample evaporation hydro carbons and thermal cracking kerogen wherein, helium is done carrier gas and is measured with flame ionization ditector;
2) press hydrocarbon source rock pyrolysed hydrocarbon S
2Analysis condition, detect and record pyrolysed hydrocarbon S
2, calculate hydrocarbon content S with following formula
2(mg hydrocarbon/g rock);
In the formula: P
Rock-rock sample pyrolysed hydrocarbon peak area;
P
Mark-standard specimen pyrolysed hydrocarbon peak area;
Q
Mark-standard specimen pyrolysed hydrocarbon content, (mg hydrocarbon/g rock);
W
Mark-standard specimen quality, mg;
W
Rock-rock sample quality, mg.
3) press analysis condition and detect and note down pyrolysed hydrocarbon S
2In acromion, calculate acromion area SA (mg hydrocarbon/g rock) with following formula;
In the formula: the condensation virtue nuclear pyrolysed hydrocarbon amount of SA-acromion representative; Mg hydrocarbon/g rock;
PA-acromion area;
P
Mark-standard specimen pyrolysed hydrocarbon peak area;
Q
Mark-standard specimen pyrolysed hydrocarbon content, (mg hydrocarbon/g rock);
W
Mark-standard specimen quality, mg;
W
Rock-rock sample quality, mg;
4) be calculated as follows pyrolysed hydrocarbon S
2The fat chain alicyclic ring pyrolysed hydrocarbon amount SF of main peak representative;
SF (mg hydrocarbon/g rock)=S
2-SA ... (3)
In the formula: the fat chain alicyclic ring pyrolysed hydrocarbon amount of SF-main peak representative, mg hydrocarbon/g rock;
S
2-pyrolysed hydrocarbon total amount, mg hydrocarbon/g rock;
The condensation virtue nuclear pyrolysed hydrocarbon amount of SA-acromion representative, mg hydrocarbon/g rock.
5) be calculated as follows the effective carbon APC of effective carbon FPC of fat chain alicyclic ring and condensation virtue nuclear and total effectively carbon TPC:
FPC(％)＝0.083×SF……(4)
APC(％)＝0.075×SA……(5)
TPC(％)＝0.083×S
2……(6)
In the formula: 0.083-fat chain alicyclic ring pyrolysed hydrocarbon (mg hydrocarbon/g rock) is scaled carbon content (%) coefficient;
0.075-condensation virtue nuclear pyrolysed hydrocarbon (mg hydrocarbon/g rock) is scaled carbon content (%) coefficient.
The effective carbon of FPC-fat, %;
The APC-virtue is carbon effectively, %;
The total effectively carbon of TPC-, %;
SF-fat pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
SA-virtue pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
S
2-total pyro lysis temperature hydrocarbon amount, mg hydrocarbon/g rock.
6) be calculated as follows latent rate D of hydrocarbon source rock degraded and hydrogen index (HI) HI;
In the formula: the latent rate of D-degraded, %;
The total effectively carbon of TPC-, %;
The TOC-total organic carbon, %;
The HI-hydrogen index (HI), mg hydrocarbon/g TOC;
S
2-pyrolysed hydrocarbon total amount, mg hydrocarbon/g rock;
7) be calculated as follows hydrocarbon source rock fat hydrogen index (HI) FHI and fragrant hydrogen index (HI) AHI:
In the formula: FHI-fat hydrogen index (HI), mg hydrocarbon/gTOC;
AHI-virtue hydrogen index (HI), mg hydrocarbon/gTOC;
SF-fat chain alicyclic ring pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
SA-virtue nuclear pyrolysed hydrocarbon amount, mg hydrocarbon/g rock;
The TOC-total organic carbon, %;
8) be calculated as follows fat carbon rate FC and aromatic carbon rate AC and invalid carbon RC:
RC(％)＝TOC-TPC……(13)
In the formula: the effective carbon of FPC-fat, %;
The APC-virtue is carbon effectively, %;
The TOC-total organic carbon, %;
The total effectively carbon of TPC-, %;
The invalid carbon of RC-, %;
FC-fat carbon rate, %;
AC-aromatic carbon rate, %;
9) form definite hydrocarbon source rock degree of ripeness and Changing Pattern with kerogen structure.
2. method according to claim 1 is characterized in that step 2) described analysis condition is rock sample constant temperature 3 minutes under 300 ℃ of furnace temperature, 50 ℃/minute to 600 ℃ constant temperature of temperature programme are 1 minute then.
3. method according to claim 1 is characterized in that the described analysis condition of step 3) is rock sample constant temperature 3 minutes under 480 ℃ of furnace temperature, and 50 ℃/minute to 600 ℃ constant temperature of temperature programme are 1 minute then.
4. method according to claim 1 is characterized in that step 9) is described and form to determine that with kerogen structure the hydrocarbon source rock degree of ripeness is: the kerogenic fat carbon of I class rate FC＞38～69 (%), aromatic carbon rate AC＞31～62 (%); The kerogenic fat carbon of IIA class rate FC＞17～38 (%), aromatic carbon rate AC＞62～83 (%); IIB class kerogen fat carbon rate FC＞8～17 (%), aromatic carbon rate AC＞83～92 (%); The kerogenic fat carbon of III class rate FC＜8 (%), aromatic carbon rate AC＞92 (%) are low ripe hydrocarbon source rock kerogen structure.
5. method according to claim 1 is characterized in that step 9) is described and form to determine that with kerogen structure the hydrocarbon source rock degree of ripeness is: and the kerogenic fat hydrogen index (HI) of I class FHI＞420～770 (mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞30～40 (the mg hydrocarbon/gTOC); The kerogenic fat hydrogen index (HI) of IIA class FHI＞175～420 (mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞40～45 (the mg hydrocarbon/gTOC); The kerogenic fat hydrogen index (HI) of IIB class FHI＞60～175 (mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞45～50 (the mg hydrocarbon/gTOC); ((mg hydrocarbon/gTOC) is low ripe hydrocarbon source rock kerogen structure for mg hydrocarbon/gTOC), fragrant hydrogen index (HI) AHI＞50 in the kerogenic fat hydrogen index (HI) of III class FHI＜60.
6. method according to claim 1, it is characterized in that step 9) with the definite hydrocarbon source rock degree of ripeness Changing Pattern of kerogen structure composition is: (the mg hydrocarbon/gTOC) rising with degree of ripeness diminishes for fat carbon rate FC (%) and fat hydrogen index (HI) FHI, (the mg hydrocarbon/gTOC) rising with degree of ripeness becomes big for aromatic carbon rate AC (%) and fragrant hydrogen index (HI) AHI, in post-mature stage (Tmax＞500 ℃), fat carbon rate FC (%) and fat hydrogen index (HI) FHI (mg hydrocarbon/gTOC) trends towards zero, and aromatic carbon rate AC (%) and fragrant hydrogen index (HI) AHI (mg hydrocarbon/gTOC) trends towards maximum.
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