CN109388817A - A kind of Reservoir Fracture three-dimensional modeling method - Google Patents
A kind of Reservoir Fracture three-dimensional modeling method Download PDFInfo
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Abstract
The invention discloses a kind of Reservoir Fracture three-dimensional modeling methods, which comprises the following steps: establishes oil-gas reservoir chronostratigraphic architecture model, sedimentary micro facies model and lithographic model；Identification, the geologic parameter for describing target reservoir Small and Medium Sized crack classify to the small scale crack in target reservoir in conjunction with the formation mechenism in small scale crack；The geologic parameter in all kinds of small scale cracks in target reservoir is counted, all kinds of small scale crack geologic parameter distribution characteristics is obtained, determines the Dominated Factors of all kinds of small scale fracture developments；Establish the distributed in three dimensions model of all kinds of rock mechanics layers；According to the distributed in three dimensions model of all kinds of rock mechanics layers, the training image in conjunction with corresponding to all kinds of small scale fractue spacings, using the well point crack data of each individual well interval of interest as hard data, and using all kinds of small scale fracture planes distribution trend prediction results as constraint condition, using Multiple-Point Geostatistics method, the three-dimensional geological model in all kinds of small scale cracks is established.
Description
Technical field
The present invention relates to a kind of Reservoir Fracture three-dimensional modeling methods, belong to petroleum and gas geology and exploration development field.
Background technique
The method and its application of Reservoir Tectonic Fracture evaluation, the important ring always being in exploration of oil and gas field and development process
One of section.From the point of view of oil-gas field development angle, the research of Reservoir Tectonic Fracture feature is to improve tar productivity, improve development effectiveness
Important means.Therefore, during the exploration and development of fossil energy, the research of Reservoir Tectonic Fracture is extremely important.Reservoir structure
Following three classes: large scale crack, small scale crack and microcrack can be roughly divided into according to its scale level by making crack.Large scale
The length scale in crack generally hundred meter levels not and its more than, seismic data can identify；The length scale in small scale crack exists
Several centimeters grades~meter level~more than ten meter~tens meter levels are other, and the distribution in small scale crack is generally controlled by rock mechanics layer, rock core
It can be identified with well-log information；The length scale of microcrack Centimeter Level and its hereinafter, the distribution of microcrack generally by rock mass
The control of portion's microstructure, wherein larger rock core can recognize, small scale is needed by identifying under mirror.In addition, due to existing
There is the Reservoir Tectonic Fracture in technology to evaluate and usually relies on conventional geology means, but the storage acquired by the fine development stage
Layer fracture evaluation data is difficult to complete and abundant, and therefore, it is necessary to pass through crack modeling analysis entire Reservoir Tectonic Fracture
Development and distribution situation.
Mainly using the method for dividing scale to model, the large scale crack of interrupting layer rank is mainly used for crack modeling at present
Decided modelling method, this method is comparatively mature, and large scale fractured model reliability is preferable, and for by tomography, fold
Small scale crack under equal Regional tectonic stress fields or regional stress field control mainly uses stochastic modeling method, i.e., is split with well point
Seam is used as hard data, using seismic properties, tomography distance, tectonic erosion periods, Production development data etc. as fractue spacing trend between well
Constraint, establishes small scale fracture spacing model, combines geological knowledge to establish small scale fracture network model of analogous outcrop and category on this basis
Property model.But the major defect of small scale crack modeling method is to lack small scale in modeling process to split in the prior art
Distribution pattern guidance is stitched, generally differs larger with the practical rule of the geology of small scale fractue spacing, leads to small scale fractured model
Precision and reliability be not high, wants to be unable to satisfy in oil-gas reservoir fine development decision process to the precision of small scale fractured model
It asks.
Summary of the invention
The purpose of the present invention is to provide a kind of Reservoir Fracture three-dimensional modeling methods.Multiple-Point Geostatistics side can be used
Method characterizes the geologic parameter and its regularity of distribution in small scale crack, practical with the geology for meeting small scale fractue spacing, meets oil
Hide the precision needs of small scale fractured model.
To achieve the above object, the present invention takes following technical scheme: a kind of Reservoir Fracture three-dimensional modeling method, feature
It is, comprising the following steps: according to the geologic information of target reservoir, geophysical information, analytical test data and Production development
Data, determines construction feature, deposition characteristics and the reservoir properties feature of target reservoir, finely divided by sedimentation time unit with
Comparison, establishes oil-gas reservoir chronostratigraphic architecture model, sedimentary micro facies model and lithographic model；It is small in identification, description target reservoir
The geologic parameter in scale crack classifies to the small scale crack in target reservoir in conjunction with the formation mechenism in small scale crack；
The geologic parameter in all kinds of small scale cracks in target reservoir is counted, obtains all kinds of small scale crack geologic parameter distribution characteristics, really
The Dominated Factors of fixed all kinds of small scale fracture developments；According to the master of the geologic information of target reservoir and all kinds of small scale fracture developments
Control factor carries out all kinds of rock mechanics layer identifications to each individual well interval of interest, divides, in conjunction with stratigraphic framework model, sedimentary micro mould
Type and lithographic model establish the distributed in three dimensions model of all kinds of rock mechanics layers；According to the distributed in three dimensions mould of all kinds of rock mechanics layers
Type, the training image in conjunction with corresponding to all kinds of small scale fractue spacings are hard with the well point crack data of each individual well interval of interest
Data, and using the plane distribution trend prediction result in all kinds of small scale cracks as constraint condition, using Multiple-Point Geostatistics side
Method establishes the three-dimensional geological model in all kinds of small scale cracks.
Further, according to the geologic parameter and Dominated Factors in all kinds of small scale cracks, all kinds of small scale cracks are determined
Attribute model.
Further, the geologic information of target reservoir includes drilling data, rock core information, analogous outcrop data and thin slice money
Material；The geophysical information of target reservoir includes seismic data and well-log information, and well-log information includes Image Logging Data and often
Advise well-log information.
Further, it is carried out by stages according to the geologic origin feature in the small scale crack of target reservoir, and according to every
The scale feature in phase small scale crack is classified small scale crack of each phase, and the occurrence then according to every grade small scale crack is special
Sign is grouped small scale cracks at different levels, and the small scale crack of each group includes multiple small scale cracks, to form target reservoir
Small scale classification of rifts scheme；All kinds of small scale cracks are the crack in scale and attitude Characteristics with statistics relationship
Set.
Further, the geologic parameter in all kinds of small scale cracks includes trend, tendency, inclination angle, longitudinally height, plane are long
Degree, aperture and Packing character；The Dominated Factors of all kinds of small scale fracture developments include the local structure of target reservoir, depth of stratum,
Lithology, sedimentary micro, lithofacies, reservoir rock mechanical property and Current stress.
Further, according between the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale crack average headways
The thickness of relationship and all kinds of rock mechanics layers and corresponding all kinds of small scale cracks are averaged the relationship between development length, knot
Lithology, mechanical properties of rock, sedimentary micro and the lithofacies for closing all kinds of rock mechanics layers determine all kinds of small in all kinds of rock mechanics layers
The Spatial Distribution Pattern of scale fracture development, and establish the corresponding training image of all kinds of small scale fractue spacings.
Further, it is determined that between the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale crack average headways
Formula based on relationship are as follows:
dn=Anh+Cn (1)
In formula, dnFor the average headway in all kinds of small scale cracks corresponding in all kinds of rock mechanics layers, h is each rocks power
The thickness of layer is learned, n is the group number in all kinds of rock mechanics layer Small and Medium Sized cracks, AnAnd CnIt is all kinds of small in all kinds of rock mechanics layers
The corresponding coefficient of scale crack average headway；
Determine the relationship that the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale cracks are averaged between development length
Based on formula are as follows:
ln=Bnh+Mn (2)
In formula, lnFor the average development length in all kinds of small scale cracks corresponding in all kinds of rock mechanics layers, BnAnd MnIt is each
All kinds of small scale cracks are averaged the corresponding coefficient of development length in rocks mechanics layer.
Further, it is provided according to the geologic information of target reservoir, geophysical information, analytical test data and Production development
Material, determines the formation mechenism in all kinds of small scale cracks, main control factor and all kinds of small scales in conjunction with all kinds of small scale cracks
The paleotectonic stress field feature of forming periods of fractures obtains each rocks of underground interval of interest using rock rupture index method
Fracture planes distribution trend prediction result between the corresponding well in all kinds of small scale cracks in mechanics layer.
Further, underground is obtained using crack analysis test or reservoir engineering inversion method between Seismic prediction of fracture, well
Fracture planes distribution trend prediction result between the corresponding well in all kinds of small scale cracks in all kinds of rock mechanics layers of interval of interest.
Further, according between the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale crack average headways
The thickness of relationship and all kinds of rock mechanics layers and the small scale crack of corresponding each group are averaged the relationship between development length, obtain
The corresponding training image in all kinds of small scale cracks, setting search mask simultaneously scan all kinds of small scale cracks in all kinds of rock mechanics layers
Corresponding training image constructs search tree, Multiple-Point Geostatistics algorithm is selected, with well point interval of interest small size crack data
As hard data, and using the plane distribution trend prediction result in all kinds of small scale cracks as constraint condition, all kinds of small scales are established
The three-dimensional geological model in crack.
Present invention offers following the utility model has the advantages that the present invention makes small scale fractue spacing meet the practical rule of geology, small ruler
Fractured model precision and high reliablity are spent, can satisfy in oil-gas reservoir fine development decision process to the essence of small scale fractured model
Degree requires, and by establishing small scale crack three-dimensional geological model, can quickly and accurately analyze entire target reservoir small size
The development and distribution situation in crack.
Other features and advantages of the present invention will be illustrated in the following description, also, partial becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
It, below will be to required in embodiment description for the clearer technical solution illustrated in the embodiment of the present invention
Attached drawing does simple introduction:
Fig. 1 is flowage structure schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of training image in the specific embodiment of the invention；
Fig. 3 is the structural schematic diagram of the three-dimensional geological model in specific embodiment of the invention Small and Medium Sized crack；
Fig. 4 is the panel map of the three-dimensional geological model in specific embodiment of the invention Small and Medium Sized crack；
Fig. 5 is the partial structural diagram of the three-dimensional geological model in specific embodiment of the invention Small and Medium Sized crack.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching technical effect can fully understand and implement.It needs to illustrate
As long as not constituting conflict, each feature in each embodiment and each embodiment in the present invention can be combined with each other,
It is within the scope of the present invention to be formed by technical solution.
As shown in Figure 1, Reservoir Fracture three-dimensional modeling method of the invention, comprising the following steps:
1) it according to the geologic information of target reservoir, geophysical information, analytical test data and Production development data, determines
The formation mechenism in target reservoir Small and Medium Sized crack is finely divided and is compared by sedimentation time unit, whens establishing oil-gas reservoir etc.
Stratigraphic framework model, sedimentary micro facies model and reservoir properties model.
Target reservoir is chosen, geologic information, geophysical information, analytical test data and the production for obtaining target reservoir are dynamic
State data.And the structure of target reservoir is determined according to geologic information, geophysical information, analytical test data and Production development data
Feature, deposition characteristics and physical property characteristic are made, is finely divided and is compared by sedimentation time unit, establish target reservoir survey region
The three-dimensional geological model of the chronostratigraphic architecture model of oil-gas reservoir, sedimentary micro and lithographic model.Wherein, the geology of target reservoir
Data includes drilling data, rock core information, analogous outcrop data and thin slice data；The geophysical information of target reservoir includes ground
Shake data and well-log information, well-log information include Image Logging Data and Conventional Logs.
2) it is identified according to the geologic information of target reservoir, geophysical information, analytical test data and Production development data
With description target reservoir Small and Medium Sized crack geologic parameter, in conjunction with the formation mechenism in small scale crack, in target reservoir
Classify in small scale crack.
It is carried out by stages according to the geologic origin feature in the small scale crack of target reservoir, and is split according to each issue small scale
The scale feature of seam is classified small scale crack of each phase, then according to every grade small scale crack attitude Characteristics at different levels small
Scale crack is grouped, and the small scale crack of each group includes multiple small scale cracks, is split with forming the small scale of target reservoir
Stitch classification schemes.All kinds of small scale cracks are that the crack in scale and attitude Characteristics with statistics relationship is gathered.
Wherein, the geologic parameter in all kinds of small scale cracks include trend, tendency, inclination angle, longitudinal height, plane length,
Aperture and Packing character.
3) geologic parameter for counting all kinds of small scale cracks in target reservoir obtains all kinds of small scale crack geologic parameters point
Cloth feature determines the Dominated Factors of all kinds of small scale fracture developments.
Wherein, the Dominated Factors of all kinds of small scale fracture developments include the local structure, depth of stratum, rock of target reservoir
Property, sedimentary micro, lithofacies, reservoir rock mechanical property and Current stress.
4) according to the Dominated Factors of the geologic information of target reservoir and all kinds of small scale fracture developments to each individual well target zone
All kinds of rock mechanics layer identifications of Duan Jinhang divide, and in conjunction with stratigraphic framework model, sedimentary micro facies model and lithographic model, establish each
The distributed in three dimensions model of rocks mechanics layer.
5) according to the distributed in three dimensions model of all kinds of rock mechanics layers, in conjunction with the corresponding trained figure of all kinds of small scale fractue spacings
Picture using the well point crack data of each individual well interval of interest as hard data, and is predicted with all kinds of small scale fracture planes distribution trends
As a result it is constraint condition, selects calculating speed fast and require training image stationarity moderate Multiple-Point Geostatistics algorithm,
Establish the three-dimensional geological model in all kinds of small scale cracks.
According to the relationship between the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale crack average headways, and
The thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale cracks are averaged the relationship between development length, in conjunction with each rocks
Lithology, mechanical properties of rock, sedimentary micro and the lithofacies of mechanics layer determine all kinds of small scale crack hairs in all kinds of rock mechanics layers
The Spatial Distribution Pattern educated, and establish training image corresponding to all kinds of small scale fractue spacings.
Determine between the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale crack average headways relationship institute according to
According to formula are as follows:
dn=Anh+Cn (1)
In formula, dnFor the average headway in all kinds of small scale cracks corresponding in all kinds of rock mechanics layers, h is each rocks power
The thickness of layer is learned, n is the group number in all kinds of rock mechanics layer Small and Medium Sized cracks, AnAnd CnIt is all kinds of small in all kinds of rock mechanics layers
The corresponding coefficient of scale crack average headway.
Determine the relationship that the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale cracks are averaged between development length
Based on formula are as follows:
ln=Bnh+Mn (2)
In formula, lnFor the average development length in all kinds of small scale cracks corresponding in all kinds of rock mechanics layers, BnAnd MnIt is each
All kinds of small scale cracks are averaged the corresponding coefficient of development length in rocks mechanics layer.
According between the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale crack average headways relationship and
The thickness of all kinds of rock mechanics layers and the small scale crack of corresponding each group are averaged the relationship between development length, obtain each rocks
The corresponding training image in all kinds of small scale cracks, setting search mask simultaneously scan the corresponding instruction in all kinds of small scale cracks in mechanics layer
Practice image, construct search tree, select Multiple-Point Geostatistics algorithm, using well point interval of interest small size crack data as hard number
According to, and using plane distribution trend prediction result between the well in all kinds of small scale cracks as constraint condition, establish all kinds of small scale cracks
Three-dimensional geological model.
Further, according to the geologic parameter and Dominated Factors in all kinds of small scale cracks, all kinds of small scale cracks are determined
Attribute model.
Further, underground is obtained using crack analysis test or reservoir engineering inversion method between Seismic prediction of fracture, well
Fracture planes distribution trend prediction result between the corresponding well in all kinds of small scale cracks in all kinds of rock mechanics layers of interval of interest.
A specific embodiment is set forth below:
The present embodiment establishes individual well interval of interest small size crack three by taking land certain oil field Z block well group in China as an example
Tie up geological model.Z block main productive layers H group reservoir is shallow water delta facies, and average pore is less than 12%.Mean permeability is small
It is low hole ultra-permeable reservior, the nearly S-N of major developmental (north and south) in Z block main productive layers H group reservoir 1 in 3.2mD (millidarcy)
To a small amount of nearly E-W (thing) Xiang Tianran small size crack.The present embodiment, to for natural small size crack, is explained by the nearly S-N in the area
The Reservoir Fracture three-dimensional modeling method based on Multiple-Point Geostatistics is stated in the practical application in the area comprising the steps of:
According to geologic information, geophysical information, analytical test data and Production development data, the structure of H group reservoir is determined
Feature, deposition characteristics and physical property characteristic are made, is finely divided and is compared by sedimentation time unit, rely on Petrel software (with three
The exploration-development integration platform centered on geological model is tieed up, geophysics specialty software is belonged to) stratum whens establishing oil-gas reservoir etc.
Skeleton Model, sedimentary micro facies model and lithographic model.
According to the identification of geologic information, geophysical information, analytical test data and Production development data and describing Z block
Crack geologic parameter, and classify to the small scale crack in H group reservoir, H group reservoir major developmental is by regional stress field control
For the nearly S-N of system to the small size crack of high angle, a small number of small size cracks are nearly E-W to wherein inclination angle is small greater than 85 ° (degree)
Sized fractures account for 90% or more.Experiment show nearly S-N to small size crack mainly formed in Early Himalayan, small size crack
It is mainly developed in sandstone, most of single rock stratum constitute independent rock mechanics layer, and the distribution in small size crack is by all kinds of
The control of rock mechanics layer, small size crack cuts through entire reservoir and, same rock mechanics closely vertical with the level of rock mechanics layer
Small size crack in layer is equally distributed, and in certain thickness range (2.8 meters of <), with all kinds of rock mechanics layers
Thickness increase, the spacing in small size crack increases.
Determine formula based on the relationship between the thickness of all kinds of rock mechanics layers and all kinds of small size cracks are as follows:
D=0.85h+1.45 (3)
R2=0.94 (4)
In formula, R is the aperture in small size crack.
In plane, small scale crack figure is stablized, and the small scale fracture penetration of single is limited, a plurality of to stitch with group list with wild goose
Column is arranged in one and extends farther away slit band, is not interconnected between adjacent two single seams, but there are lesser
Away from.
Determine formula based on the relationship between all kinds of rock mechanics thickness degree and all kinds of small size fracture penetrations
Are as follows:
L=10.2h+0.55 (5)
R2=0.72 (6)
The development in all kinds of small size cracks with rock mechanics thickness degree in addition to having outside the Pass, while the rock also with rock mechanics layer
Property, mechanical properties of rock, sedimentary micro are related with lithofacies.
The geologic parameter in all kinds of small scale cracks in H group reservoir is counted, all kinds of small scale crack geologic parameter distributions are obtained
Feature determines the Dominated Factors of all kinds of small scale fracture developments.
According to the Dominated Factors of the geologic information of H group reservoir and all kinds of small scale fracture developments to each individual well interval of interest into
All kinds of rock mechanics layer identifications of row divide, and in conjunction with stratigraphic framework model, sedimentary micro facies model and lithographic model, establish all kinds of rocks
The distributed in three dimensions model of stone mechanics layer.
According to the relationship between the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale crack average headways, and
The thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale cracks are averaged the relationship between development length, in conjunction with each rocks
Lithology, mechanical properties of rock, sedimentary micro and the lithofacies of mechanics layer determine all kinds of small scale crack hairs in all kinds of rock mechanics layers
The Spatial Distribution Pattern educated, and the corresponding training image in all kinds of small scale cracks in all kinds of rock mechanics layers is obtained (such as Fig. 2 institute
Show).
Formation mechenism of the nearly S-N to all kinds of small size cracks is determined according to the geologic information of H group reservoir, in conjunction with all kinds of small rulers
The paleotectonic stress field feature of the governing factor in very little crack and all kinds of small scale forming periods of fractures, is referred to using rock rupture
Counting method obtains in each individual well interval of interest rock mechanics layer nearly S-N to the corresponding fracture planes distribution in all kinds of small scale cracks
Trend prediction result.
Setting search mask simultaneously scans the corresponding training image in all kinds of small scale cracks, search tree is constructed, with the small ruler in well point
Very little crack data are as hard data, and using the fracture planes distribution trend prediction result in all kinds of small scale cracks as constraint condition,
Selection calculating speed is fast and requires training image stationarity moderate Multiple-Point Geostatistics algorithm, establishes each in H group reservoir
The three-dimensional geological model (as seen in figures 3-5) in the small scale crack of class.
While it is disclosed that embodiment content as above but described only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of Reservoir Fracture three-dimensional modeling method, which comprises the following steps:
According to the geologic information of target reservoir, geophysical information, analytical test data and Production development data, determine that target is stored up
Construction feature, deposition characteristics and the reservoir properties feature of layer are finely divided and are compared by sedimentation time unit, establish oil-gas reservoir
Chronostratigraphic architecture model, sedimentary micro facies model and lithographic model；
Identification, the geologic parameter for describing target reservoir Small and Medium Sized crack store up target in conjunction with the formation mechenism in small scale crack
Classify in small scale crack in layer；
The geologic parameter in all kinds of small scale cracks in target reservoir is counted, it is special to obtain all kinds of small scale crack geologic parameter distributions
Sign, determines the Dominated Factors of all kinds of small scale fracture developments；
Each individual well interval of interest is carried out according to the Dominated Factors of the geologic information of target reservoir and all kinds of small scale fracture developments
All kinds of rock mechanics layer identifications divide, and in conjunction with stratigraphic framework model, sedimentary micro facies model and lithographic model, establish each rocks
The distributed in three dimensions model of mechanics layer；
According to the distributed in three dimensions model of all kinds of rock mechanics layers, the training image in conjunction with corresponding to all kinds of small scale fractue spacings,
Using the well point crack data of each individual well interval of interest as hard data, and with the plane distribution trend prediction knot in all kinds of small scale cracks
Fruit is constraint condition, using Multiple-Point Geostatistics method, establishes the three-dimensional geological model in all kinds of small scale cracks.
2. a kind of Reservoir Fracture three-dimensional modeling method according to claim 1, which is characterized in that split according to all kinds of small scales
The geologic parameter and Dominated Factors of seam determine the attribute model in all kinds of small scale cracks.
3. a kind of Reservoir Fracture three-dimensional modeling method according to claim 1, which is characterized in that the geology of target reservoir provides
Material includes drilling data, rock core information, analogous outcrop data and thin slice data；The geophysical information of target reservoir includes earthquake
Data and well-log information, well-log information include Image Logging Data and Conventional Logs.
4. a kind of Reservoir Fracture three-dimensional modeling method according to claim 1, which is characterized in that according to the small of target reservoir
The geologic origin feature in scale crack carries out by stages it, and according to the scale feature in each issue small scale crack to small scale of each phase
Crack is classified, and is grouped then according to the attitude Characteristics in every grade small scale crack to small scale cracks at different levels, each group is small
Scale crack includes multiple small scale cracks, to form the small scale classification of rifts scheme of target reservoir；All kinds of small scales are split
Seam is that the crack in scale and attitude Characteristics with statistics relationship is gathered.
5. a kind of Reservoir Fracture three-dimensional modeling method according to claim 4, which is characterized in that all kinds of small scale cracks
Geologic parameter includes trend, tendency, inclination angle, longitudinal height, plane length, aperture and Packing character；All kinds of small scale fracture developments
Dominated Factors include target reservoir local structure, depth of stratum, lithology, sedimentary micro, lithofacies, reservoir rock mechanical property
And Current stress.
6. a kind of Reservoir Fracture three-dimensional modeling method according to claim 1, which is characterized in that according to all kinds of rock mechanics
Layer thickness and corresponding all kinds of small scale crack average headways between relationship and all kinds of rock mechanics layers thickness with it is right
All kinds of small scale cracks answered are averaged the relationship between development length, in conjunction with lithology, the rock mechanics of all kinds of rock mechanics layers
Matter, sedimentary micro and lithofacies determine all kinds of small scale fracture spaces distribution patterns in all kinds of rock mechanics layers, and establish all kinds of small
The corresponding training image of scale fractue spacing.
7. a kind of Reservoir Fracture three-dimensional modeling method according to claim 6, which is characterized in that determine all kinds of rock mechanics
Formula based on relationship between the thickness and corresponding all kinds of small scale crack average headways of layer are as follows:
dn=Anh+Cn (1)
In formula, dnFor the average headway in all kinds of small scale cracks corresponding in all kinds of rock mechanics layers, h is all kinds of rock mechanics layers
Thickness, n be all kinds of rock mechanics layer Small and Medium Sized cracks group number, AnAnd CnFor all kinds of small scales in all kinds of rock mechanics layers
The corresponding coefficient of crack average headway；
Determine relationship institute that the thickness of all kinds of rock mechanics layers and corresponding all kinds of small scale cracks are averaged between development length according to
According to formula are as follows:
ln=Bnh+Mn (2)
In formula, lnFor the average development length in all kinds of small scale cracks corresponding in all kinds of rock mechanics layers, BnAnd MnFor all kinds of rocks
All kinds of small scale cracks are averaged the corresponding coefficient of development length in stone mechanics layer.
8. a kind of Reservoir Fracture three-dimensional modeling method according to claim 1, which is characterized in that according to the ground of target reservoir
Matter data, geophysical information, analytical test data and Production development data determine the formation mechenism in all kinds of small scale cracks,
In conjunction with the Dominated Factors in all kinds of small scale cracks and the paleotectonic stress field feature of all kinds of small scale forming periods of fractures, adopt
With rock rupture index method, obtains and split between the corresponding well in all kinds of small scale cracks in all kinds of rock mechanics layers of underground interval of interest
Stitch plane distribution trend prediction result.
9. a kind of Reservoir Fracture three-dimensional modeling method according to claim 1, which is characterized in that pre- using Seismic Fracture
It surveys, crack analysis test or reservoir engineering inversion method obtain all kinds of small rulers in all kinds of rock mechanics layers of underground interval of interest between well
Fracture planes distribution trend prediction result between the corresponding well in degree crack.
10. a kind of Reservoir Fracture three-dimensional modeling method described according to claim 6 or 7 or 8 or 9, which is characterized in that according to each
Relationship and all kinds of rock mechanics layers between the thickness of rocks mechanics layer and corresponding all kinds of small scale crack average headways
Thickness and the small scale crack of corresponding each group be averaged the relationship between development length, obtain all kinds of small in all kinds of rock mechanics layers
The corresponding training image in scale crack, setting search mask simultaneously scan the corresponding training image in all kinds of small scale cracks, and building is searched
Suo Shu selects Multiple-Point Geostatistics algorithm, using well point interval of interest small size crack data as hard data, and with all kinds of small
The plane distribution trend prediction result in scale crack is constraint condition, establishes the three-dimensional geological model in all kinds of small scale cracks.
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| CN114218790B (en) * | 2021-12-14 | 2023-09-08 | 成都理工大学 | Shale reservoir fracture in-band rock mechanical property modeling method |
| CN114218790A (en) * | 2021-12-14 | 2022-03-22 | 成都理工大学 | Modeling method for rock mechanical property in shale reservoir fracture zone |
| US11921250B2 (en) | 2022-03-09 | 2024-03-05 | Saudi Arabian Oil Company | Geo-mechanical based determination of sweet spot intervals for hydraulic fracturing stimulation |
| CN114755310A (en) * | 2022-04-26 | 2022-07-15 | 中国地质大学（武汉） | Method for predicting evolution rule of rock mechanics layer of fractured reservoir |
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