CN105257285B - Oil gas fills the evaluation method of ability from hydrocarbon source rock to karst reservoir - Google Patents
Oil gas fills the evaluation method of ability from hydrocarbon source rock to karst reservoir Download PDFInfo
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Abstract
The evaluation method of ability is filled from hydrocarbon source rock to karst reservoir the present invention relates to a kind of oil gas, this method is on the basis of Stratigraphic framework is established, count and divide hydrocarbon source rock and the contact relation type of karst reservoir, determine the affecting parameters of hydrocarbon charge ability, quantitative calculating is carried out to hydrocarbon charge ability, realizes the across comparison of hydrocarbon charge ability.The lithology classification of the invention for considering diverse location hydrocarbon source rock comprehensively, hydrocarbon primary rock producing hydrocarbon intensity, store up contact relation type in source, reservoir porosity, reservoir permeability items influence factor, solve in the past only by analyzing hydrocarbon source rock, hydrocarbon source rock is briefly described in migration path system, the position contact relation of reservoir carries out the deficiency of hydrocarbon charge capability analysis, compared with prior art, its analysis result is more accurate, the specific charge position of oil gas and the size of filling ability can be reflected, hydrocarbon source rock and the hydrocarbon charge capacity variance in karst reservoir contact range is set to have a clearly understanding, be advantageous to preferred oil-gas exploration zone, effectively improve drilling success.
Description
Technical field
The invention belongs to petroleum and gas geology and exploration technical field, specifically, it is related to a kind of oil gas from hydrocarbon source rock to karst
Reservoir fills the evaluation method of ability.
Background technology
Oil gas from hydrocarbon source rock to reservoir filling be hydrocarbon reservoiring key link, determine reservoir circle to a certain extent
The oil-gas filling degree and oil ＆ gas pool size closed, evaluation oil gas fill ability for evaluating favourable exploration area from hydrocarbon source rock to reservoir
Band and exploration targets, it is significant to reduce exploration risk.Current only a small number of scholars are filled for oil gas from hydrocarbon source rock to reservoir
Note ability has carried out research, therefore how to evaluate the problem of hydrocarbon charge ability turns into urgent need to resolve.Forefathers are it is proposed that with hydrocarbon
Source potential (Demaison, 1991), basin numerical simulation method (Schneider, 2000；Yang Jiaming, 2002) and convergence unit
Analytic approach (Tong Zhigang, 2009) carries out hydrocarbon charge merit rating, but these methods are only from the hydrocarbon source rock or conductor department of macroscopic view
Knowledge Favorable Zones are sentenced by system etc., lack the fine evaluation that oil gas fills ability from hydrocarbon source rock to reservoir.Chen Yicai (2011) is examined
Consider the filling energy that hydrocarbon primary rock producing hydrocarbon intensity carrys out quantitative assessment natural gas with effectively row's hydrocarbon ability, reservoir thickness and reservoir porosity
Power, but source is stored up contact relation, the parameter such as reservoir permeability without reference to.Chen Zhelong (2015) is by counting oily inclusion enclave
Abundance (GOI indexes) and the relation of oil reservoir oil saturation, to characterize the size of reservoir hydrocarbons filling intensity, but because drilling well takes
Core and sample analysis limited amount, it is difficult to realize zonal evaluation.Filling ability of the oil gas from hydrocarbon source rock to reservoir and hydrocarbon source
The many factors such as rock, reservoir and the contact relation of the two are closely related, particularly the anisotropism of karst reservoir itself it is strong and
Complex with the contact relation of hydrocarbon source rock, the evaluation of its hydrocarbon charge ability is more difficult.Therefore, oil gas is from hydrocarbon source rock to rock
The filling merit rating of molten reservoir, it is necessary to consider hydrocarbon source rock, source storage contact relation, reservoir porosity and reservoir permeability this
The factor of a little aspects, the difference of fine evaluation hydrocarbon charge ability from plane, so as to provide guidance for oil-gas exploration.
In terms of filling ability of the oil gas from hydrocarbon source rock to karst reservoir, because hydrocarbon source rock is not often by single rock
Property composition, and karst reservoir is subject to unbalanced karstification in exposure period, and reservoir top surface lithology transitivity differs greatly, this
A little filling abilities of the factor to oil gas generate material impact.And technology today does not consider above-mentioned factors, cause point
Analysis result is not fully accurate, and fails the relative size for the specific charge position and filling ability for reflecting oil gas, influences
Understanding and oil-gas exploration zone to hydrocarbon charging it is preferred, reduce exploration success ratio.
The content of the invention
The present invention is carried out present in evaluation procedure for existing to oil gas from hydrocarbon source rock to karst reservoir filling ability
Above-mentioned deficiency, there is provided a kind of oil gas from hydrocarbon source rock to karst reservoir fill ability evaluation method, this method solve with
Toward only by analyzing hydrocarbon source rock, migration path system or the position contact relation progress hydrocarbon charge energy that hydrocarbon source rock, reservoir is briefly described
The deficiency of power analysis, there is a clearly understanding to the hydrocarbon charge capacity variance in hydrocarbon source rock and reservoir contact range,
Be advantageous to preferred oil-gas exploration zone, effectively improve drilling success.
According to one embodiment of the invention, there is provided a kind of oil gas fills the evaluation side of ability from hydrocarbon source rock to karst reservoir
Method, contain following steps：
(1) Stratigraphic framework is established：Make Strata Comparison section along vertical configuration direction, establish Stratigraphic framework, describe different wells
Between and different sections between stratigraphic distribution relation, determine hydrocarbon source rock and the relative position relation of karst reservoir；
(2) the contact relation type of hydrocarbon source rock and karst reservoir is divided：According to individual well well logging, well-log information, hydrocarbon is counted
Longitudinal the lithology classification and the contact relation of hydrocarbon source rock and karst reservoir of source bed, according to lithology combination, divide hydrocarbon source rock
With the contact relation type of karst reservoir；
(3) affecting parameters and scoring criteria of hydrocarbon charge ability are determined：From individual well, the individual well position is determined respectively
The hydrocarbon primary rock producing hydrocarbon intensity put, source storage contact relation type, reservoir porosity, reservoir permeability quadrinomial parameter, according to above-mentioned four
The distribution of item parameter, the scoring criteria of each parametric variable is established, and each parameter is become respectively according to the real data of individual well
Amount carries out assignment；
(4) hydrocarbon charge ability is quantitatively calculated：According to each parameter determined in step (3), weight total value is set as 1,
Consider influence degree of each parameter to hydrocarbon charge ability, weight assignment is carried out to different parameters, wherein, hydrocarbon primary rock producing hydrocarbon is strong
It is 0.1 to spend weighted value, and source storage contact relation type weight value is 0.2, and reservoir porosity weighted value is 0.3, reservoir permeability power
Weight values are 0.4, and then fill ability to karst reservoir from hydrocarbon source rock to oil gas by formula (1) and carry out quantitative calculating, formula
(1) expression formula is as follows：
In formula, S is hydrocarbon charge ability；HAlwaysFor gross reservoir interval；HΦFor the thickness of certain section porosity reservoir；HkFor certain
The thickness of section permeability reservoir；WΦFor reservoir porosity variable assignments；WkFor reservoir permeability variable assignments；SR is that source storage connects
Relationship type variable assignments is touched, HGD is hydrocarbon primary rock producing hydrocarbon intensive variable assignment；
(5) hydrocarbon charge ability across comparison：Formula (1) in applying step (four) is calculated all individual wells, is pressed
Classified according to the relative size of result of calculation S values, and classification results are projected to plan respectively, contrast hydrocarbon charge energy
The size of power, determine favourable charge position.
In evaluation method according to embodiments of the present invention, in step (3), hydrocarbon primary rock producing hydrocarbon intensity is newest using China
The oil and gas resource evaluation result of one wheel or oil field department are directed to the evaluation result of hydrocarbon source rock, or use origin cause of formation volumetric method or basin
Simulation is calculated, and when being calculated using origin cause of formation volumetric method, the calculation formula of hydrocarbon primary rock producing hydrocarbon intensity is：
Hydrocarbon primary rock producing hydrocarbon intensity=hydrocarbon source rock area × hydrocarbon source rock thickness × hydrocarbon source rock density × organic carbon content × organic
Carbon recovery coefficient × organic matter degradation rate (2) uses IES.Petromod softwares by inputting the phase in above-mentioned formula (2)
Related parameter carries out numerical simulation calculation to hydrocarbon primary rock producing hydrocarbon intensity.
In evaluation method according to embodiments of the present invention, in step (3), source storage contact relation type uses step
(2) division result in.
In evaluation method according to embodiments of the present invention, in step (3), reservoir porosity is by counting the storage surveyed
Layer porosity data obtains, or uses well log interpretation porosity data, and counts shared by the reservoir thickness in each porosity section
The ratio of a whole set of reservoir thickness obtains.
In evaluation method according to embodiments of the present invention, in step (3), the determination method of reservoir permeability is：Pass through
The reservoir permeability data of statistics actual measurement obtain, or use well log interpretation permeability data, and count each permeability section
The ratio of a whole set of reservoir thickness shared by reservoir thickness obtains.
The oil gas that the embodiment of the present invention proposes fills the evaluation method of ability from hydrocarbon source rock to karst reservoir, is establishing ground
On the basis of layer screen work, count and divide hydrocarbon source rock and the contact relation type of karst reservoir, determine hydrocarbon charge ability
Affecting parameters, quantitative calculating is carried out to hydrocarbon charge ability using the method for expert estimation, realizes the transverse direction of hydrocarbon charge ability
Contrast, solve in the past only by analyze hydrocarbon source rock, migration path system or hydrocarbon source rock is briefly described, the position contact relation of reservoir is entered
The deficiency of row hydrocarbon charge capability analysis.Ability is filled from hydrocarbon source rock to karst reservoir by the oil gas of the embodiment of the present invention
Evaluation method is evaluated hydrocarbon charge ability, due to considering lithology classification, the hydrocarbon source of diverse location hydrocarbon source rock comprehensively
Rock hydrocarbon intensity, source storage contact relation type, reservoir porosity, reservoir permeability items influence factor, and to hydrocarbon charge energy
Power carries out quantitative calculating, realizes the across comparison of hydrocarbon charge ability, compared with prior art, its analysis result is more accurate, energy
Enough reflect the specific charge position of oil gas and the size of filling ability, make hydrocarbon source rock and the oil in karst reservoir contact range
Gas filling capacity variance has a clearly understanding, is advantageous to preferred oil-gas exploration zone, effectively improves drilling success.
Brief description of the drawings
Accompanying drawing 1 is the stream for the evaluation method that specific embodiment of the invention oil gas fills ability from hydrocarbon source rock to karst reservoir
Cheng Tu.
Accompanying drawing 2 is specific embodiment of the invention hydrocarbon source rock and the relative position relation of karst reservoir.
Accompanying drawing 3 is the contact relation Type division result of specific embodiment of the invention hydrocarbon source rock and karst reservoir.
Accompanying drawing 4 is that the sub- section karst reservoir natural gas of specific embodiment of the invention Ordos Basin Jingxi area horse 55 fills
Note merit rating result.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated.
To evaluate Ordos Basin Jingxi Region of Oil-gas from Permian-carboniferous hydrocarbon source rock to Ordovician Karstified reservoir
Exemplified by filling ability, Fig. 1 is to fill commenting for ability from hydrocarbon source rock to karst reservoir according to a kind of oil gas of the embodiment of the present invention
The flow chart of valency method.This method contains following steps：
(1) Stratigraphic framework is established, it is concretely comprised the following steps：
The Strata Comparison section in direction from west to east is done, establishes Stratigraphic framework, contrast Permian-carboniferous hydrocarbon source rock and Austria
The stratum of pottery ware karst reservoir and position distribution relation.
(2) the contact relation type of hydrocarbon source rock and karst reservoir is divided, it is concretely comprised the following steps：
Foundation individual well well logging, well-log information, count longitudinal the lithology classification and hydrocarbon source rock and karst reservoir of hydrocarbon source rock
Contact relation, be four types by hydrocarbon source rock and the contact relation Type division of karst reservoir according to lithology combination.By scheming
The contact relation Type division result of hydrocarbon source rock and karst reservoir shown in 2 understands that the first kind is hydrocarbon source rock-karst reservoir
Directly contact, the filling to natural gas is most favourable；Second class is that burning into sand rock hydrocarbon source rock-karst reservoir directly contacts, natural gas
Into sandstone reservoir in hydrocarbon source rock, another part fills to karst reservoir for part migration；3rd class is hydrocarbon source rock-sandstone storage
The mediate contact of layer-karst reservoir, natural gas fill to sandstone reservoir first, then just have part to migrate to karst reservoir；4th
Class is hydrocarbon source rock-bauxitic mudstone-karst reservoir mediate contact, and due to bauxitic mudstone Compacted rock, oozing property of hole is poor, it is difficult to
There is natural gas to pass through.
(3) affecting parameters and scoring criteria of hydrocarbon charge ability are determined, its step is：
Determine that the hydrocarbon primary rock producing hydrocarbon intensity of 85 mouthfuls of drilling well positions, source store up contact relation type, reservoir porosity, reservoir respectively
Permeability quadrinomial parameter.Wherein, hydrocarbon primary rock producing hydrocarbon intensity is commented using the Changqing oilfields branch company graduate hydrocarbon source rock of exploration and development
Valency result；Source storage contact relation type uses the division result in step (2)；Reservoir porosity uses the well log interpretation hole number of degrees
According to reference to reservoir levels criteria for classification, statistics reservoir porosity ＜ 2%, 2%≤reservoir porosity ＜ 4%, 4%≤reservoir hole
Porosity ＜ 6%, reservoir porosity >=6% each porosity section reservoir thickness shared by a whole set of reservoir thickness ratio；Reservoir
Permeability uses well log interpretation permeability data, with reference to reservoir levels criteria for classification, statistics reservoir permeability ＜ 0.05mD,
0.05mD≤reservoir permeability ＜ 0.1mD, 0.1mD≤reservoir permeability ＜ 1mD, reservoir permeability >=1mD each permeability area
Between reservoir thickness shared by a whole set of reservoir thickness ratio.
To make last result of calculation that there is operability, according to the distribution of each parameter, each parametric variable is established
Scoring criteria, and assignment is carried out to each parametric variable according to the real data of individual well respectively.Table 1 is influence natural gas origin ability
Each parametric variable scoring criteria.
Table 1
(4) hydrocarbon charge ability is quantitatively calculated, its step is：
According to each parameter determined in step (3), weight total value is set as 1, considers each parameter to hydrocarbon charge ability
Influence degree, weight assignment is carried out to different parameters, wherein, hydrocarbon primary rock producing hydrocarbon intensity weighted value is 0.1, source storage contact relation
Type weight value is 0.2, and reservoir porosity weighted value is 0.3, and reservoir permeability weighted value is 0.4, and then right by formula (1)
Oil gas carries out quantitative calculating from hydrocarbon source rock to karst reservoir filling ability, and the expression formula of formula (1) is as follows：
In formula, S is hydrocarbon charge ability；HAlwaysFor gross reservoir interval；HΦFor the thickness of certain section porosity reservoir；HkFor certain
The thickness of section permeability reservoir；WΦFor reservoir porosity variable assignments；WkFor reservoir permeability variable assignments；SR is that source storage connects
Relationship type variable assignments is touched, HGD is hydrocarbon primary rock producing hydrocarbon intensive variable assignment.
(5) hydrocarbon charge ability across comparison, its step are：
Formula (1) in applying step (four) is calculated the natural gas origin ability of 85 mouthfuls of drilling well positions, calculates knot
Fruit S values are bigger, represent Permian-carboniferous primary rock producing hydrocarbon into natural gas be more easily accessible karst reservoir., will according to result of calculation
Filling capacity of water is divided into three classes：S >=6 are I classes, and 4≤S ＜ 6 are II classes, S<4 be Group III.Contact is stored up for D classes source to close
System, is influenceed, natural gas is difficult to fill, so the S values of D class contact relations position are considered as 0, it fills by bauxitic mudstone interlayer
Note ability is classified as IV class.
The natural gas origin ability category division result of 85 mouthfuls of drilling well positions is projected to plan, contrasts different zones
The size of hydrocarbon charge ability, the sub- section karst reservoir natural gas origin merit rating result of Jingxi area horse 55 are as shown in Figure 4.
Analysis result shows as shown in Figure 4, and each block natural gas origin capacity variance is larger, Jingxi area middle part well-Lian11Jing of peach 20
Based on I classes, II classes, natural gas origin ability is maximum in region, is secondly the northern well area of 33 wells of peach-peach 31 in Jingxi area, with
Based on II classes and Group III, based on Group III and IV classes, filling ability is poor in other regions.Therefore, Jingxi area middle part peach 20
The karst reservoir of well-Lian11Jing and its neighboring area is best exploration region in next step, is secondly the northern peach in Jingxi area
The well of 33 wells-peach 31 and its karst reservoir of neighboring area.
In certain embodiments, in step (3), hydrocarbon primary rock producing hydrocarbon intensity is commented using the petroleum resources of China's the latest round of
Valency result.
In certain embodiments, in step (3), hydrocarbon primary rock producing hydrocarbon intensity is entered using origin cause of formation volumetric method or basin modelling method
Row calculates, and when being calculated using origin cause of formation volumetric method, the calculation formula of hydrocarbon primary rock producing hydrocarbon intensity is：
Hydrocarbon primary rock producing hydrocarbon intensity=hydrocarbon source rock area × hydrocarbon source rock thickness × hydrocarbon source rock density × organic carbon content × organic
Carbon recovery coefficient × organic matter degradation rate (2)
Or hydrocarbon primary rock producing hydrocarbon intensity is entered by inputting the relevant parameter in above-mentioned formula (2) using IES.Petromod softwares
Row numerical simulation calculation.
In certain embodiments, in step (3), reservoir porosity is obtained by counting the reservoir pore space degrees of data of actual measurement.
In certain embodiments, in step (3), reservoir permeability is obtained by counting the reservoir permeability data of actual measurement.
Above-described embodiment is used for explaining the present invention, rather than limits the invention, in the spirit and power of the present invention
It is required that protection domain in, to any modifications and changes for making of the present invention, both fall within protection scope of the present invention.
Claims (5)
1. a kind of oil gas fills the evaluation method of ability from hydrocarbon source rock to karst reservoir, it is characterised in that：Contain following steps：
(1) Stratigraphic framework is established：Make Strata Comparison section along vertical configuration direction, establish Stratigraphic framework, describe between different wells
And the stratigraphic distribution relation between different sections, determine hydrocarbon source rock and the relative position relation of karst reservoir；
(2) the contact relation type of hydrocarbon source rock and karst reservoir is divided：According to individual well well logging, well-log information, hydrocarbon source rock is counted
Longitudinal the lithology classification and the contact relation of hydrocarbon source rock and karst reservoir of layer, according to lithology combination, divide hydrocarbon source rock and rock
The contact relation type of molten reservoir；
(3) affecting parameters and scoring criteria of hydrocarbon charge ability are determined：From individual well, the individual well position is determined respectively
Hydrocarbon primary rock producing hydrocarbon intensity, source storage contact relation type, reservoir porosity, reservoir permeability quadrinomial parameter, according to above-mentioned four ginsengs
Several distributions, the scoring criteria of each parametric variable is established, and each parametric variable is entered respectively according to the real data of individual well
Row assignment；
(4) hydrocarbon charge ability is quantitatively calculated：According to each parameter determined in step (3), weight total value is set as 1, is considered
Each parameter carries out weight assignment to the influence degree of hydrocarbon charge ability to different parameters, wherein, hydrocarbon primary rock producing hydrocarbon intensity power
Weight values are 0.1, and source storage contact relation type weight value is 0.2, and reservoir porosity weighted value is 0.3, reservoir permeability weighted value
For 0.4, and then ability is filled to karst reservoir from hydrocarbon source rock to oil gas by formula (1) and carries out quantitative calculating, formula (1)
Expression formula is as follows：
In formula, S is hydrocarbon charge ability；HAlwaysFor gross reservoir interval；HΦFor the thickness of certain section porosity reservoir；HkFor certain section
The thickness of permeability reservoir；WΦFor reservoir porosity variable assignments；WkFor reservoir permeability variable assignments；SR is that source storage contact is closed
Set type variable assignments, HGD are hydrocarbon primary rock producing hydrocarbon intensive variable assignment；
(5) hydrocarbon charge ability across comparison：Formula (1) in applying step (four) is calculated all individual wells, according to meter
The relative size for calculating result S values is classified, and classification results are projected to plan respectively, contrast hydrocarbon charge ability
Size, determine favourable charge position.
2. oil gas according to claim 1 fills the evaluation method of ability from hydrocarbon source rock to karst reservoir, its feature exists
In：In step (3), hydrocarbon primary rock producing hydrocarbon intensity is directed to using the oil and gas resource evaluation result or oil field department of China's the latest round of
The evaluation result of hydrocarbon source rock, or calculated using origin cause of formation volumetric method or basin modelling method, counted using origin cause of formation volumetric method
During calculation, the calculation formula of hydrocarbon primary rock producing hydrocarbon intensity is：
Hydrocarbon primary rock producing hydrocarbon intensity=hydrocarbon source rock area × hydrocarbon source rock thickness × hydrocarbon source rock density × organic carbon content × organic carbon is extensive
Complex coefficient × organic matter degradation rate (2)
Or hydrocarbon primary rock producing hydrocarbon intensity is entered by inputting the relevant parameter in above-mentioned formula (2) using IES.Petromod softwares
Row numerical simulation calculation.
3. oil gas according to claim 1 fills the evaluation method of ability from hydrocarbon source rock to karst reservoir, its feature exists
In：In step (3), source storage contact relation type uses the division result in step (2).
4. oil gas according to claim 1 fills the evaluation method of ability from hydrocarbon source rock to karst reservoir, its feature exists
In：In step (3), reservoir porosity is obtained by counting the reservoir pore space degrees of data of actual measurement, or uses well log interpretation porosity
Data, and the ratio for counting a whole set of reservoir thickness shared by the reservoir thickness in each porosity section obtains.
5. oil gas according to claim 1 fills the evaluation method of ability from hydrocarbon source rock to karst reservoir, its feature exists
In：In step (3), reservoir permeability is obtained by counting the reservoir permeability data of actual measurement, or uses well log interpretation permeability
Data, and the ratio for counting a whole set of reservoir thickness shared by the reservoir thickness in each permeability section obtains.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106094053A (en) * | 2016-06-07 | 2016-11-09 | 中国石油天然气股份有限公司 | A kind of hydrocarbon source rock life residence strength calculation method and device |
| CN109064351B (en) * | 2018-10-15 | 2021-12-10 | 中国石油大学(华东) | Quantitative evaluation method for filling capacity of oil gas in buried hill |
| CN111075443B (en) * | 2019-12-31 | 2021-08-27 | 成都理工大学 | Natural gas filling semi-quantitative measuring system and method suitable for low-abundance gas reservoir |
| CN114086947B (en) * | 2020-08-24 | 2024-03-19 | 中国石油化工股份有限公司 | Method and device for judging oil gas filling direction, electronic equipment and storage medium |
| CN113759099B (en) * | 2021-09-07 | 2023-07-21 | 重庆科技学院 | Quantitative evaluation method for oil-gas filling capacity of source-storage side-connected oil-gas reservoir |
| CN116956643B (en) * | 2023-09-20 | 2023-12-19 | 中国地质大学（北京） | Quantitative characterization method for longitudinal/transverse heterogeneous characteristics of hydrocarbon source rock |
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