CN106803021B - A kind of evaluation method of routine and the petroleum resources amount of unconventional reservoir - Google Patents
A kind of evaluation method of routine and the petroleum resources amount of unconventional reservoir Download PDFInfo
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Abstract
The present invention provides the evaluation methods of a kind of routine and the petroleum resources amount of unconventional reservoir.This method comprises: obtaining row's hydrocarbon rate of hydrocarbon source rock according to hydrocarbon primary rock producing hydrocarbon potential index；According to row's hydrocarbon rate of hydrocarbon source rock, hydrocarbon source rock row's hydrocarbon intensity is obtained；Hydrocarbon intensity is arranged according to hydrocarbon source rock, obtains hydrocarbon source rock Hydrocarbon yield；According to hydrocarbon source rock Hydrocarbon yield, conventional, compact reservoir petroleum resources amount outside source is obtained；According to lighter hydrocarbons compensation correction formula, residual liquid hydrocarbon rate in acquisition source；According to residual liquid hydrocarbon rate in source, residual liquid hydrocarbon amount in source is obtained；According to residual gas-oil ratio, residual gaseous hydrocarbon rate in acquisition source；According to residual gaseous hydrocarbon rate in source, residual gaseous hydrocarbon amount in source is obtained；According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in source and source, obtain remaining oil gas stock number in source；According to oil gas stock number is remained in compact reservoir petroleum resources amount outside source and source, unconventional petroleum resources amount is obtained, completes the evaluation to the petroleum resources amount of routine and unconventional reservoir.
Description
Technical field
The present invention relates to a kind of Petroleum Resources Assessments more particularly to the petroleum resources of a kind of routine and unconventional reservoir
The evaluation method of amount belongs to oil and gas resource evaluation technical field.
Background technique
Oil and gas resource evaluation is the important foundation for carrying out oilfield prospecting developing and decision rule.With Global Oil and Gas Resources
The change of structure, the discovery of frontier petroleum resources and the development of oil-gas geology theory, to the thinking and method of resource assessment
It also proposed requirements at the higher level, to promote geological knowledge, preferably reflect petroleum resources status.
Currently, related scholar has been with regard to having done many work on oil and gas resource evaluation, wherein relatively conventional resource assessment side
Method mainly has three categories: analogy method, statistic law, origin cause of formation method.
Analogy method: it is main using the analogy method based on producing well ultimate recoverable reserves (EUR), while also amplifying out one kind and changing
Into MPAA method, MPAA is a kind of method that piecemeal EUR analogy method is combined with volumetric method, by carry out piecemeal analogy EUR, so
Keep prediction result relatively reliable with the stock number of bulk of reservoir rock correction prediction afterwards.Analogy method is suitable for medium, higher exploration ground
Area, evaluation procedure is easy, quick, is disadvantageous in that key parameter is difficult to determine, does not fully consider ultimate recoverable reserves sky
Between correlation.
Statistic law: common statistic law has volumetric method and two kinds of Method of Stochastic.Volumetric method mainly (is analogized) with analogy
Analysis carries out stock number estimation and analysis for foundation and to unit geologic body, that is, carries out piecemeal evaluation；Stochastic simulation method is having well
Area use sequence Gauss algorithm stochastic simulation method, no wellblock use analogy method, by analogy obtain EUR spatial relationship and
Relevant parameter carries out multiple-point simulation.Statistic law is suitable for low exploratory area, and evaluation procedure is easy, quick, is disadvantageous in that
Do not consider that the key parameters such as air content, porosity have obvious heterogeneity, the usual numerical value of evaluation result is higher, to basic geology
The analysis precision of data requires high.
Origin cause of formation method: common thermal simulation method and PHiK model is established.By production quantity, discharge rate to hydro carbons in hydrocarbon source rock and
Adsorbance, migration quantity and scattering amount etc. calculate, and determine the Hydrocarbons Accumulating Quantity in oil-gas reservoir.This method be suitable in it is low,
Middle high exploratory area can systematically understand petroleum resources geology distribution characteristics and accumulation rule, be disadvantageous in that basin mould
Quasi- process is complicated, and evaluation cycle is long.
The above common oil and gas resource evaluation method method has certain scope of application, can not achieve to conventional and unconventional
The comprehensive integrated evaluation of petroleum resources, and evaluation procedure is cumbersome, and evaluation cycle is longer.
Summary of the invention
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of oil gas of routine and unconventional reservoir moneys
Mathematical model and petroleum resources geology distribution characteristics are combined by the evaluation method of source amount, the evaluation method, can be with quantification
Characterization routine and unconventional petroleum resources amount.
In order to achieve the above technical purposes, commenting the present invention provides a kind of routine and the petroleum resources amount of unconventional reservoir
Valence method, the conventional evaluation method with the petroleum resources amount of unconventional reservoir the following steps are included:
According to hydrocarbon primary rock producing hydrocarbon potential index, row's hydrocarbon rate of hydrocarbon source rock is obtained；
According to row's hydrocarbon rate of hydrocarbon source rock, hydrocarbon source rock row's hydrocarbon intensity is obtained；
Hydrocarbon intensity is arranged according to hydrocarbon source rock, obtains hydrocarbon source rock Hydrocarbon yield；
According to hydrocarbon source rock Hydrocarbon yield, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir petroleum resources
Amount；
Lighter hydrocarbons compensation correction formula is established, according to lighter hydrocarbons compensation correction formula, residual liquid hydrocarbon rate in acquisition source；
According to residual liquid hydrocarbon rate in the source, residual liquid hydrocarbon amount in source is obtained；
Residual gas-oil ratio, residual gaseous hydrocarbon rate in acquisition source are obtained by hydrocarbon thermal simulation experiment；
According to residual gaseous hydrocarbon rate in source, residual gaseous hydrocarbon amount in source is obtained；
According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in source and source, obtain remaining oil gas stock number in source；
According to oil gas stock number is remained in compact reservoir petroleum resources amount outside source and source, unconventional petroleum resources amount is obtained,
Complete the evaluation to the petroleum resources amount of routine and unconventional reservoir.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, hydrocarbon primary rock producing hydrocarbon potential index
It is obtained according to source rock sample Pyrolysis Experiment, is characterized as (S1+S2)/TOC, unit are mg HC/g TOC.Wherein, S1For by unit
The hydrocarbon amount that quality source rock sample obtains during being heated to 300 DEG C, unit are mg HC/g rock sample；S2For by unit mass hydrocarbon
Source rock sample is heated to the hydrocarbon amount obtained at 300 DEG C -600 DEG C, and unit is mg HC/g rock sample；TOC represents unit mass hydrocarbon source rock
In total content of organic carbon, unit mg/g rock sample.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that according to hydrocarbon source rock
Hydrocarbon generation potential index follows the steps below when obtaining row's hydrocarbon rate of hydrocarbon source rock:
Establish hydrocarbon primary rock producing hydrocarbon potential index and maturity of organic matter index RoHydrocarbon primary rock producing hydrocarbon potential index section；
According to hydrocarbon primary rock producing hydrocarbon potential index section, hydrocarbon source rock row's hydrocarbon rate model is established, row's hydrocarbon rate of hydrocarbon source rock is obtained:
Pge=Pgo-Pgr；
Pgo=k×Pg0；
Wherein, PgrTo remain hydrocarbon generation potential index, mg HC/g TOC；
Pg0For hydrocarbon primary rock producing hydrocarbon potential index at row's hydrocarbon thresholding, mg HC/g TOC；
PgoFor the original hydrocarbon generation potential index of hydrocarbon source rock, mg HC/g TOC；
PgeFor row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC.
In above-mentioned hydrocarbon source rock row's hydrocarbon rate model of the invention, hydrocarbon primary rock producing hydrocarbon potential index (S1+S2The packet of)/TOC section
Hydrocarbon generation potential index value on winding thread, is characterized as Pgr, obtained according to hydrocarbon source rock pyrolysis and organic carbon determination experiment；
Original hydrocarbon generation potential index Pg according to material balance principle, after recoveryoWith residual hydrocarbon generation potential index PgrDifference
As arrange hydrocarbon rate Pge；
Hydrocarbon primary rock producing hydrocarbon potential index (S1+S2In)/TOC section, arranging the value at hydrocarbon thresholding on corresponding envelope is Pg0。
On row's hydrocarbon thresholding, rock be in undersaturated condition, only meet itself absorption, residual, after dissolved hydrocarbon amount, oil gas
It can largely be discharged.Become larger as depth increases with Ro, when reaching row's hydrocarbon thresholding, oil gas starts largely to be discharged.Hydrocarbon thresholding is arranged at this time
Locating corresponding hydrocarbon generation potential index is remaining maximum hydrocarbon potentiality, is denoted as Pg0(Peng J.W.,Pang X.Q.,Shi
H.S.,et al.Hydrocarbon generation and expulsion characteristics of Eocene
source rocks in the Huilu area,northern Pearl River Mouth basin,South China
Sea:implications for tight oil potential[J].Marine&Petroleum Geology,2016,72:
463-487.)。
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that according to hydrocarbon source rock
Row's hydrocarbon rate obtain hydrocarbon source rock row's hydrocarbon intensity according to following formula:
Wherein, IpeFor hydrocarbon source rock arrange hydrocarbon intensity, × 108m3/km2；
PgeFor row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
RoFor reflectance of vitrinite, %；
Ro1For corresponding reflectance of vitrinite at row's hydrocarbon thresholding, %；
Ro′For practical reflectance of vitrinite under row's hydrocarbon thresholding, %.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that according to hydrocarbon source rock
Row's hydrocarbon intensity follows the steps below when obtaining hydrocarbon source rock Hydrocarbon yield:
It determines the fine and close lower limit of porosity Ф=12% according to reservoir densification history, divides densification outside the outer conventional reservoir in source and source
Reservoir, the corresponding hydrocarbon amount being expelled in conventional reservoir on fine and close lower limit corresponding under fine and close lower limit to be expelled to cause outside source in the source outside
Hydrocarbon amount in close reservoir；
Establish the hydrocarbon amount model Q being expelled to outside source in conventional reservoirpec:
Establish the hydrocarbon amount model Q being expelled to outside source in compact reservoirpet:
Wherein, QpecFor the Hydrocarbon yield for being expelled to conventional reservoir outside source, × 1012m3；
QpetFor the hydrocarbon amount being expelled to outside source in compact reservoir, × 1012m3；
PgeFor row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
A is hydrocarbon source rock area, m2；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
RoFor reflectance of vitrinite, %；
Ro1For corresponding reflectance of vitrinite at row's hydrocarbon thresholding, %；
Ro2For the practical reflectance of vitrinite between row's hydrocarbon thresholding and fine and close lower limit, %；
Ro3For corresponding reflectance of vitrinite at fine and close lower limit, %；
Ro4For the practical reflectance of vitrinite under fine and close lower limit, %.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that according to hydrocarbon source rock
Hydrocarbon yield, according to following formula, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir petroleum resources amount:
Qc=Qpec×μc
Qt=Qpet×μt
Wherein, QcFor the petroleum resources amount of conventional reservoir outside source, × 1012m3；
QtFor the petroleum resources amount of compact reservoir outside source, × 1012m3；
QpecFor the hydrocarbon amount being expelled to outside source in conventional reservoir, × 1012m3；
QpetFor the hydrocarbon amount being expelled to outside source in compact reservoir, × 1012m3；
μcFor the convergence factor of conventional reservoir outside source, %；
μtFor the convergence factor of compact reservoir outside source, %.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that lighter hydrocarbons compensate school
Positive formula are as follows:
Bk=0.81-0.65Ro+0.18Ro 2
Wherein, Prl′It is remaining including C in hydrocarbon source rock5+Liquid hydrocarbon rate inside, mg HC/g TOC；
PrlFor the residual liquid hydrocarbon rate surveyed in hydrocarbon source rock, refer generally to C15+Liquid hydrocarbon amount, mg HC/g TOC；
BkFor C in hydrocarbon source rock5-14Component accounts for remaining liquid hydrocarbon total amount C5+Percentage, %；
RoFor the reflectance of vitrinite of matrix organic in hydrocarbon source rock, %.
Remaining hydrocarbon includes two class of liquid hydrocarbon and gaseous hydrocarbon in rock, according to existing mode can be divided into adsorbed hydrocarbons,
Dissolved hydrocarbon and three kinds of free hydrocarbon commonly use the hydrocarbon amount " S that method for pyrolysis obtains in production1" summarize above-listed three kinds of forms residual hydrocarbons it is total
Amount, when due to the pretreatments such as rock core goes out cylinder, sample saves, dry, broken sample and heating, the light fraction (C of residual hydrocarbons in sample5-
C14) volatilized, in actual measurement S1In there is no embodying, therefore need lighter hydrocarbons compensation correction, obtain including C5+Liquid hydrocarbon rate inside, with
Prl' parameter characterization.Therefore, lighter hydrocarbons compensation correction formula (Pang Xiongqi, oily basin that the present invention uses Pang Xiongqi (1993) to propose
Ground ground history, thermal history, life residence history numerical simulation study and hydrocarbon source rock quantitative assessment [M], 1993,71.).
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that according to residual in source
Liquid hydrocarbon rate is stayed, according to following formula, obtains residual liquid hydrocarbon amount in source:
Wherein, QrlResidual liquid hydrocarbon amount in source, × 1012m3；
Pr1′It is remaining including C in hydrocarbon source rock5+Liquid hydrocarbon rate inside, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
A is hydrocarbon source rock area, m2；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
Ro5For reflectance of vitrinite at hydrocarbon thresholding, %；
Ro′For the reflectance of vitrinite under hydrocarbon thresholding, %.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that pass through hydrocarbon heat
Simulated experiment obtains residual gas-oil ratio using following formula:
Wherein, ω is residual gas-oil ratio；
qgFor factor of created gase, mg HC/g TOC；
qoFor oil productivity, mg HC/g TOC；
For the efflux coefficient of gaseous hydrocarbon, %；
For the efflux coefficient of liquid hydrocarbon, %；
Residual gaseous hydrocarbon rate in the source is obtained according to following formula:
Prg=Prl′×ω
Wherein, PrgFor residual gaseous hydrocarbon rate in source, mg HC/g TOC；
Prl′It is remaining including C in hydrocarbon source rock5+Liquid hydrocarbon rate inside, mg HC/g TOC；
ω is residual gas-oil ratio.
Specific embodiment according to the present invention, factor of created gase and oil productivity are obtained according to hydrocarbon thermal simulation experiment.Pass through life
Hydrocarbon thermal simulation experiment, can obtain unit mass TOC is generated under different pyrolysis temperatures (corresponding different Ro) gaseous hydrocarbon amount and
Different efflux coefficient meters is respectively adopted since the gentle efflux coefficient of oil is different in liquid hydrocarbon amount, as factor of created gase and oil productivity
It calculates, using above-mentioned formula, can be obtained residual gas-oil ratio.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that according to residual in source
Gaseous hydrocarbon rate is stayed, according to following formula, obtains residual gaseous hydrocarbon amount in source:
Wherein, QrgFor residual gaseous hydrocarbon amount in source, × 1012m3；
PrgFor residual gaseous hydrocarbon rate in source, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
A is hydrocarbon source rock area, m2；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
Ro5For reflectance of vitrinite at hydrocarbon thresholding, %；
Ro′For the reflectance of vitrinite under hydrocarbon thresholding, %.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that according to residual in source
Residual gaseous hydrocarbon amount in liquid hydrocarbon amount and the source is stayed, according to following formula, obtains remaining oil gas stock number in source:
Qr=Qrl×μl+Qrg×μg
Wherein, QrFor in source remain oil gas stock number, × 1012m3；
QrlFor residual liquid hydrocarbon amount in source, × 1012m3；
QrgFor residual gaseous hydrocarbon amount in source, × 1012m3；
μlFor the convergence factor of residual liquid hydrocarbon in source, %；
μgFor the convergence factor of residual gaseous hydrocarbon in source, %.
In the evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is preferable that caused according to outside source
Oil gas stock number is remained in close reservoir hydrocarbons stock number and source, according to following formula, obtains unconventional petroleum resources amount:
Quc=Qt+Qr
Wherein, QucFor unconventional petroleum resources amount, × 1012m3；
QtFor compact reservoir petroleum resources amount outside source, × 1012m3；
QrFor in source remain oil gas stock number, × 1012m3。
The evaluation method of the petroleum resources amount of routine and unconventional reservoir of the invention, it is comprehensive using hydrocarbon potentiality method for the first time
Conventional gas and oil outside evaluation study area source, fine and close oil gas (such as tight sand oil gas) outside source, residual oil gas in source (such as shale oil gas,
Coal seam oil gas) stock number.
Routine of the invention compared with existing evaluation method, has with the evaluation method of the petroleum resources amount of unconventional reservoir
It has the advantages that:
Using the recovery of hydrocarbon potentiality and lighter hydrocarbons compensation correction, restore original hydrocarbon potentiality and original residual liquid hydrocarbon respectively
Rate closer descends actual conditions；
Reinforce hydrocarbon source rock to re-recognize and finely dissect, establishes the raw row's of staying hydrocarbon Whole Process Simulation model；
Binding purpose layer hole infiltration property distribution characteristics and source bed life residence history matching relationship, utilize compact reservoir lower limit (Ф
=12%) densification petroleum resources outside the outer conventional gas and oil resource in source and source are distinguished；
For the first time using residual hydrocarbons gas-oil ratio in hydrocarbon thermal simulation experiment acquisition source, in conjunction with the original residual liquid hydrocarbon after correction
Residual gaseous hydrocarbon rate in rate calculating source；
The problem of routine or unconventional petroleum resources can only individually be evaluated by overcoming traditional resource evaluation method, to carry out
It is conventional to provide basic geology model with unconventional resource assessment.
Detailed description of the invention
Fig. 1 is the evaluation method flow chart of the routine of embodiment 1 and the petroleum resources amount of unconventional reservoir.
Fig. 2 is the evaluation model figure of the routine of embodiment 1 and the petroleum resources amount of unconventional reservoir.
Fig. 3 is the Upper Paleozoic in Ordos Basin hydrocarbon primary rock producing hydrocarbon potential index of embodiment 1 with Ro variation diagram.
Fig. 4 is that the Upper Paleozoic in Ordos Basin coal of embodiment 1 arranges hydrocarbon intensity map now.
Fig. 5 is that the Upper Paleozoic in Ordos Basin mud stone of embodiment 1 arranges hydrocarbon intensity map now.
Fig. 6 is residual liquid hydrocarbon rate figure in the Upper Paleozoic in Ordos Basin source of embodiment 1.
Fig. 7 is that the Upper Paleozoic in Ordos Basin of embodiment 1 remains gas-oil ratio figure.
Fig. 8 is residual gaseous hydrocarbon rate figure in the Upper Paleozoic in Ordos Basin source of embodiment 1.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Embodiment 1
Present embodiments provide a kind of evaluation method of the petroleum resources amount of routine and unconventional reservoir, the evaluation method stream
Journey figure is as shown in Figure 1, the raw row's of staying hydrocarbon and evaluation model figure are as shown in Figure 2, the specific steps are as follows:
Step 1: row's hydrocarbon rate is calculated according to hydrocarbon primary rock producing hydrocarbon potential index
Fig. 3 is Upper Paleozoic in Ordos Basin hydrocarbon primary rock producing hydrocarbon potential index with RoVariation diagram, from top to bottom, with hydrocarbon source
Rock maturity increases hydrocarbon potentiality and increases, and hydro carbons starts to be discharged after maturity increases to row's hydrocarbon thresholding, and hydrocarbon potentiality gradually subtract
It is small.By original hydrocarbon generation potential index before recovery row's hydrocarbon thresholding, row's hydrocarbon can be obtained in conjunction with residual hydrocarbon generation potential index now
Rate；
Hydrocarbon source rock row hydrocarbon rate model (Pg is established according to hydrocarbon generation potential index sectione) it is as follows:
Pge=Pgo-Pgr；
Pgo=k × Pg0；
Wherein, PgrTo remain hydrocarbon generation potential index, mg HC/g TOC；Pg0Refer to for hydrocarbon primary rock producing hydrocarbon potentiality at row's hydrocarbon thresholding
Number；PgoFor the original hydrocarbon generation potential index of hydrocarbon source rock, mg HC/g TOC；PgeTo arrange hydrocarbon rate, mg HC/g TOC.The raw row's of staying hydrocarbon mould
Formula is as shown in Figure 2.
Step 2: hydrocarbon source rock row's hydrocarbon intensity is obtained according to row's hydrocarbon rate
According to hydrocarbon source rock row hydrocarbon rate, hydrocarbon source rock thickness, hydrocarbon source rock density, total content of organic carbon and mirror matter under differing maturity
Volume reflectivity integrates the row's of determination hydrocarbon intensity；
Establish hydrocarbon source rock row hydrocarbon strength model (Ipe) it is as follows:
Wherein, IpeFor outside source hydrocarbon source rock arrange hydrocarbon intensity, × 108m3/km2；PgeTo arrange hydrocarbon rate, mg HC/g TOC；H is hydrocarbon
Source rock thickness, m；ρ is hydrocarbon source rock density, g/cm3；TOC is total content of organic carbon, %；RoFor reflectance of vitrinite, %；RolFor
Arrange corresponding reflectance of vitrinite at hydrocarbon thresholding, %；Ro′For practical reflectance of vitrinite under row's hydrocarbon thresholding, %；
As shown in figure 4, arranging hydrocarbon intensity map now for Upper Paleozoic in Ordos Basin coal
As shown in figure 5, arranging hydrocarbon intensity map now for Upper Paleozoic in Ordos Basin mud stone.
Step 3: hydrocarbon source rock Hydrocarbon yield is obtained according to row's hydrocarbon intensity
Fine and close lower limit (the R of porosity Ф=12% is determined according to reservoir densification historyoCharacterization), divide the outer conventional reservoir in source with
Compact reservoir outside source, the corresponding hydrocarbon amount being expelled in conventional reservoir on fine and close lower limit corresponding under fine and close lower limit to be discharged in the source outside
Hydrocarbon amount outside to source in compact reservoir；
Establish the hydrocarbon amount model (Q being expelled to outside source in conventional reservoirpec) it is as follows:
Establish the hydrocarbon amount model (Q being expelled to outside source in compact reservoirpet) it is as follows:
Wherein, QpecAnd QpetRespectively it is expelled to conventional reservoir outside source, the hydrocarbon amount outside source in compact reservoir, × 1012m3；
PgeTo arrange hydrocarbon rate, mg HC/g TOC；H is hydrocarbon source rock thickness, m；A is hydrocarbon source rock area, m2；ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；RoFor reflectance of vitrinite, %；Ro1For corresponding reflectance of vitrinite at row's hydrocarbon thresholding, %；
Ro2For the practical reflectance of vitrinite between row's hydrocarbon thresholding and fine and close lower limit, %；Ro3It is anti-for corresponding vitrinite at fine and close lower limit
Penetrate rate, %；Ro4For the practical reflectance of vitrinite under fine and close lower limit, %；
Be calculated hydrocarbon amount 24.7 that Upper Paleozoic in Ordos Basin hydrocarbon source rock is expelled to outside source in conventional reservoir ×
1012m3, the hydrocarbon amount being expelled to outside source in compact reservoir is 246.9 × 1012m3。
Step 4: conventional and compact reservoir petroleum resources amount outside source is obtained according to Hydrocarbon yield
The hydro carbons being discharged from hydrocarbon source rock can lose during migration, and the oil and gas content of final Aggregation indica wants small
In the oil and gas content of discharge, therefore, the conventional hydrocarbon amount with compact reservoir outside source that will be expelled to is multiplied by respective convergence factor respectively
Obtain the conventional petroleum resources amount with compact reservoir outside source；
Establish the stock number model (Q outside source in conventional reservoirc) it is as follows:
Qc=Qpec×μc；
Establish the stock number model (Q outside source in compact reservoirt) it is as follows:
Qt=Qpet×μt；
Wherein, QcAnd QtConventional reservoir respectively outside source, the stock number outside source in compact reservoir, × 1012m3；QpecAnd Qpet
Respectively it is expelled to conventional reservoir outside source, the hydrocarbon amount outside source in compact reservoir, × 1012m3；μcAnd μtConventional storage respectively outside source
Convergence factor outside layer, source in compact reservoir, %；
The convergence factor of oil gas will carry out value in conjunction with practical geological condition, and research area's degree of prospecting, geological conditions are different,
Shale oil gas, coal seam oil gas, tight sand oil gas, conventional gas and oil are distinct, cause convergence factor value different, obtained money
Source amount result also can more general value have relatively large deviation, therefore should sufficiently combine in value practical.
Obtaining the stock number outside Upper Paleozoic in Ordos Basin source in conventional reservoir is 7.4 × 1012m3, fine and close storage outside source
Stock number in layer is 8.6 × 1012m3。
Step 5: according to residual liquid hydrocarbon rate in lighter hydrocarbons compensation correction calculating source
Remaining hydrocarbon includes two class of liquid hydrocarbon and gaseous hydrocarbon in rock, according to existing mode can be divided into adsorbed hydrocarbons,
Dissolved hydrocarbon and 3 kinds of free hydrocarbon commonly use the hydrocarbon amount " S that method for pyrolysis obtains in production1" summarize above-listed 3 kinds of forms residual hydrocarbons it is total
Amount, when due to the pretreatments such as rock core goes out cylinder, sample saves, dry, broken sample and heating, the light fraction (C of residual hydrocarbons in sample5-
C14) volatilized, in actual measurement S1In there is no embodying, therefore need lighter hydrocarbons compensation correction；
Lighter hydrocarbons compensation correction formula is established, residual liquid hydrocarbon rate (Pr is obtainedl′) it is as follows:
Bk=0.81-0.65Ro+0.18Ro 2；
Wherein, Prl′It is remaining including C in hydrocarbon source rock5+Liquid hydrocarbon rate inside, mg HC/g TOC；Pr1For hydrocarbon source rock
The residual liquid hydrocarbon rate of middle actual measurement, refers generally to C15+Liquid hydrocarbon amount, mg HC/g TOC；BkFor C in hydrocarbon source rock5-14Component accounts for residual
The liquid hydrocarbon total amount C stayed5+Percentage, %；RoFor the reflectance of vitrinite of matrix organic in hydrocarbon source rock, %；
As shown in fig. 6, being Liquid Residue in the Upper Paleozoic in Ordos Basin source being calculated according to lighter hydrocarbons compensation correction
State hydrocarbon rate figure.
Step 6: residual liquid hydrocarbon amount in source is obtained according to residual liquid hydrocarbon rate in source
Establish residual liquid hydrocarbon amount model (Q in sourcerl) it is as follows:
Wherein, QrlResidual liquid hydrocarbon amount in source, × 1012m3；Prl′It is remaining including C in hydrocarbon source rock5+Liquid inside
Hydrocarbon rate, mg HC/g TOC；H is hydrocarbon source rock thickness, m；A is hydrocarbon source rock area, m2；ρ is hydrocarbon source rock density, g/cm3；TOC is total
Organic carbon content, %；Ro5For reflectance of vitrinite at hydrocarbon thresholding, %；Ro′For the vitrinite reflectance under hydrocarbon thresholding
Rate, %.
It is calculated, residual liquid hydrocarbon amount is 35.49 × 10 in Upper Paleozoic in Ordos Basin source12m3(work as by oil gas
Amount is scaled 354.9 × 108t)。
Step 7: residual gas-oil ratio, residual gaseous hydrocarbon rate in calculating source are obtained according to hydrocarbon thermal simulation experiment
The formula of residual gas-oil ratio is calculated according to hydrocarbon thermal simulation experiment are as follows:
Wherein, ω is residual gas-oil ratio；qgAnd qoRespectively factor of created gase, oil productivity, mg HC/g TOC, according to hydrocarbon hot-die
Draft experiment obtains；WithThe respectively efflux coefficient of gaseous hydrocarbon and liquid hydrocarbon, %；
Establish residual gaseous hydrocarbon rate model (Pr in sourceg):
Prg=Prl′×ω；
Wherein, PrgFor residual gaseous hydrocarbon rate in source, mg HC/g TOC；Prl′It is remaining including C in hydrocarbon source rock5+Inside
Liquid hydrocarbon rate, mg HC/g TOC；ω is residual gas-oil ratio；
As shown in fig. 7, remaining gas-oil ratio figure to obtain Upper Paleozoic in Ordos Basin according to hydrocarbon thermal simulation experiment；Such as
It is residual gaseous hydrocarbon rate figure in the Upper Paleozoic in Ordos Basin source obtained according to residual gas-oil ratio shown in Fig. 8.
Step 8: residual gaseous hydrocarbon amount in source is obtained according to residual gaseous hydrocarbon rate in source
Establish residual gaseous hydrocarbon amount model (Q in sourcerg):
Wherein, QrgResidual gaseous hydrocarbon amount in source, × 1012m3；PrgFor residual gaseous hydrocarbon rate in source, mg HC/g TOC；H is
Hydrocarbon source rock thickness, m；A is hydrocarbon source rock area, m2；ρ is hydrocarbon source rock density, g/cm3；TOC is total content of organic carbon, %；Ro5It makes a living
Reflectance of vitrinite at hydrocarbon thresholding, %；Ro′For the reflectance of vitrinite under hydrocarbon thresholding, %；
It is 22.9 × 10 that residual gaseous hydrocarbon amount in Upper Paleozoic in Ordos Basin source, which is calculated,12m3。
Step 9: residual oil gas stock number is measured into source according to residual liquid hydrocarbon amount in source and residual gaseous hydrocarbon
According to following formula, calculates and remain oil gas stock number (Q in sourcer):
Qr=Qrl×μl+Qrg×μg；
Wherein, QrFor in source remain oil gas stock number, × 1012m3；QrlAnd QrgResidual liquid hydrocarbon amount and source respectively in source
Interior residual gaseous hydrocarbon amount, × 1012m3；μlAnd μgRespectively in source in residual liquid hydrocarbon and source residual gaseous hydrocarbon aggregation system
Number, %；
The convergence factor value of oil gas will fully consider research area's actual conditions, study the degree of prospecting in area, geological conditions,
Routine and unconventional oil and gas property can all influence convergence factor value, obtained stock number result also can relatively unify assignment have it is larger
Deviation.
Step 10: obtaining unconventional oil and gas money according to oil gas stock number is remained in compact reservoir petroleum resources amount outside source and source
Source amount
Quc=Qt+Qr；
Wherein, QucFor unconventional petroleum resources amount, × 1012m3；QtAnd QrOil gas money respectively outside source in compact reservoir
Residual oil gas stock number in source amount and source, × 1012m3；
It finally obtains, compact reservoir petroleum resources amount 8.6 × 10 outside source12m3；In source remain oil gas stock number 29.2 ×
1012m3；Sum of the two 37.8 × 1012m3, as unconventional petroleum resources amount.
The evaluation method of the petroleum resources amount of above embodiments explanation, routine of the invention and unconventional reservoir, it is closer
Underground actual conditions；The problem of routine or unconventional petroleum resources can only individually be evaluated by overcoming traditional resource evaluation method,
Basic geology model is provided to carry out conventional and unconventional resource assessment.
Claims (10)
1. the evaluation method of a kind of routine and the petroleum resources amount of unconventional reservoir, which is characterized in that the conventional and unconventional storage
Layer petroleum resources amount evaluation method the following steps are included:
According to hydrocarbon primary rock producing hydrocarbon potential index, row's hydrocarbon rate of hydrocarbon source rock is obtained；
According to row's hydrocarbon rate of the hydrocarbon source rock, hydrocarbon source rock row's hydrocarbon intensity is obtained；
Hydrocarbon intensity is arranged according to the hydrocarbon source rock, obtains hydrocarbon source rock Hydrocarbon yield；
According to the hydrocarbon source rock Hydrocarbon yield, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir petroleum resources
Amount；
Lighter hydrocarbons compensation correction formula is established, according to lighter hydrocarbons compensation correction formula, residual liquid hydrocarbon rate in acquisition source；
According to residual liquid hydrocarbon rate in the source, residual liquid hydrocarbon amount in source is obtained；
Residual gas-oil ratio, residual gaseous hydrocarbon rate in acquisition source are obtained by hydrocarbon thermal simulation experiment；
According to residual gaseous hydrocarbon rate in the source, residual gaseous hydrocarbon amount in source is obtained；
According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in the source and the source, obtain remaining oil gas stock number in source；
According to oil gas stock number is remained in compact reservoir petroleum resources amount outside the source and the source, unconventional petroleum resources are obtained
Amount completes the evaluation to the petroleum resources amount of routine and unconventional reservoir.
2. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that root
It is followed the steps below when obtaining row's hydrocarbon rate of hydrocarbon source rock according to hydrocarbon primary rock producing hydrocarbon potential index:
Establish hydrocarbon primary rock producing hydrocarbon potential index and maturity of organic matter index RoHydrocarbon primary rock producing hydrocarbon potential index section；
According to hydrocarbon primary rock producing hydrocarbon potential index section, hydrocarbon source rock hydrocarbon expulsion is established, obtains row's hydrocarbon rate of hydrocarbon source rock:
Pge=Pgo-Pgr；
Pgo=k × Pg0；
Wherein, PgrTo remain hydrocarbon generation potential index, mg HC/g TOC；
Pg0For hydrocarbon primary rock producing hydrocarbon potential index at row's hydrocarbon thresholding, mg HC/g TOC；
PgoFor the original hydrocarbon generation potential index of hydrocarbon source rock, mg HC/g TOC；
PgeFor row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；
TOC is total content of organic carbon, %.
3. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that root
Hydrocarbon source rock row's hydrocarbon intensity is obtained according to following formula according to row's hydrocarbon rate of the hydrocarbon source rock:
Wherein, IpeFor hydrocarbon source rock arrange hydrocarbon intensity, × 108m3/km2；
PgeFor row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
RoFor reflectance of vitrinite, %；
RolFor corresponding reflectance of vitrinite at row's hydrocarbon thresholding, %；
Ro′For practical reflectance of vitrinite under row's hydrocarbon thresholding, %.
4. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that root
It is followed the steps below when obtaining hydrocarbon source rock Hydrocarbon yield according to hydrocarbon source rock row's hydrocarbon intensity:
It determines the fine and close lower limit of porosity Φ=12% according to reservoir densification history, divides the outer densification of the outer conventional reservoir in source and source and store up
Layer, the hydrocarbon amount being expelled to outside source in conventional reservoir is corresponded on fine and close lower limit, is corresponded under fine and close lower limit and is expelled to densification outside source
Hydrocarbon amount in reservoir；
Establish the hydrocarbon amount model Q being expelled to outside source in conventional reservoirpec:
Establish the hydrocarbon amount model Q being expelled to outside source in compact reservoirpet:
Wherein, QpecFor the Hydrocarbon yield for being expelled to conventional reservoir outside source, × 1012m3；
QpetFor the hydrocarbon amount being expelled to outside source in compact reservoir, × 1012m3；
PgeFor row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
A is hydrocarbon source rock area, m2；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
RoFor reflectance of vitrinite, %；
Ro1For corresponding reflectance of vitrinite at row's hydrocarbon thresholding, %；
Ro2For the practical reflectance of vitrinite between row's hydrocarbon thresholding and fine and close lower limit, %；
Ro3For corresponding reflectance of vitrinite at fine and close lower limit, %；
Ro4For the practical reflectance of vitrinite under fine and close lower limit, %.
5. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that root
According to the hydrocarbon source rock Hydrocarbon yield, according to following formula, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir oil
Gas stock number:
Qc=Qpec×μc
Qt=Qpet×μt
Wherein, QeFor the petroleum resources amount of conventional reservoir outside source, × 1012m3；
QtFor the petroleum resources amount of compact reservoir outside source, × 1012m3；
QpecFor the hydrocarbon amount being expelled to outside source in conventional reservoir, × 1012m3；
QpetFor the hydrocarbon amount being expelled to outside source in compact reservoir, × 1012m3；
μeFor the convergence factor of conventional reservoir outside source, %；
μtFor the convergence factor of compact reservoir outside source, %.
6. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that institute
State lighter hydrocarbons compensation correction formula are as follows:
Wherein, Bk=0.81-0.65Ro+0.18Ro 2
Prl′It is remaining including C in hydrocarbon source rock5+Liquid hydrocarbon rate inside, mg HC/g TOC；
PrlFor the residual liquid hydrocarbon rate surveyed in hydrocarbon source rock, refer generally to C15+Liquid hydrocarbon amount, mg HC/g TOC；
BkFor C in hydrocarbon source rock5-14Component accounts for remaining liquid hydrocarbon total amount C5+Percentage, %；
RoFor the reflectance of vitrinite of matrix organic in hydrocarbon source rock, %；
TOC is total content of organic carbon, %.
7. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that root
According to residual liquid hydrocarbon rate in the source, according to following formula, residual liquid hydrocarbon amount in source is obtained:
Wherein, Qr1Residual liquid hydrocarbon amount in source, × 1012m3；
Prl′It is remaining including C in hydrocarbon source rock5+Liquid hydrocarbon rate inside, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
A is hydrocarbon source rock area, m2；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
Ro5For reflectance of vitrinite at hydrocarbon thresholding, %；
Ro′For the reflectance of vitrinite under hydrocarbon thresholding, %.
8. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that logical
Hydrocarbon thermal simulation experiment is crossed, using following formula, obtains residual gas-oil ratio:
Wherein, ω is residual gas-oil ratio；
qgFor factor of created gase, mg HC/g TOC；
qoFor oil productivity, mg HC/g TOC；
For the efflux coefficient of gaseous hydrocarbon, %；
For the efflux coefficient of liquid hydrocarbon, %；
Residual gaseous hydrocarbon rate in the source is obtained according to following formula:
Prg=Prl′×ω
Wherein, PrgFor residual gaseous hydrocarbon rate in source, mg HC/g TOC；
Prl′It is remaining including C in hydrocarbon source rock5+Liquid hydrocarbon rate inside, mg HC/g TOC；
ω is residual gas-oil ratio；
TOC is total content of organic carbon, %.
9. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that root
According to residual gaseous hydrocarbon rate in the source, according to following formula, residual gaseous hydrocarbon amount in source is obtained:
Wherein, QrgFor residual gaseous hydrocarbon amount in source, × 1012m3；
PrgFor residual gaseous hydrocarbon rate in source, mg HC/g TOC；
H is hydrocarbon source rock thickness, m；
A is hydrocarbon source rock area, m2；
ρ is hydrocarbon source rock density, g/cm3；
TOC is total content of organic carbon, %；
Ro5For reflectance of vitrinite at hydrocarbon thresholding, %；
Ro′For the reflectance of vitrinite under hydrocarbon thresholding, %.
10. the evaluation method of routine according to claim 1 and the petroleum resources amount of unconventional reservoir, which is characterized in that
According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in the source and the source, according to following formula, obtain remaining oil gas in source
Stock number:
Qr=Qrl×μl+Qrg×μg
Wherein, QrFor in source remain oil gas stock number, × 1012m3；
QrlFor residual liquid hydrocarbon amount in source, × 1012m3；
QrgFor residual gaseous hydrocarbon amount in source, × 1012m3；
μlFor the convergence factor of residual liquid hydrocarbon in source, %；
μgFor the convergence factor of residual gaseous hydrocarbon in source, %.
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| CN110930020B (en) * | 2019-11-20 | 2022-02-11 | 中国地质大学（北京） | Method for determining economic recoverable resource amount of unconventional oil and gas resources |
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| CN113407899B (en) * | 2021-08-20 | 2021-10-26 | 中国科学院地质与地球物理研究所 | Evaluation method for hydrocarbon discharge amount of marine high-over-mature hydrocarbon source rock |
| CN114894928B (en) * | 2022-04-29 | 2023-03-24 | 中国地质大学（武汉） | Method for obtaining in-situ oil gas components and light hydrocarbon gas loss amount by utilizing rock closed hole |
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