CN107680160A - A kind of braided stream endo conformation laddering modeling method and system - Google Patents
A kind of braided stream endo conformation laddering modeling method and system Download PDFInfo
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- CN107680160A CN107680160A CN201710816856.XA CN201710816856A CN107680160A CN 107680160 A CN107680160 A CN 107680160A CN 201710816856 A CN201710816856 A CN 201710816856A CN 107680160 A CN107680160 A CN 107680160A
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Abstract
The invention discloses the modeling method and system that a kind of braided stream endo conformation is laddering, wherein method includes：Establish the three-dimensional grid model in work area；If generating arroyo in the default pigtail stream region of three-dimensional grid model according to river course parameter, if the interlaced superposition in arroyo forms pigtail stream band；Some channel bars are generated in river course according to channel bar parameter；Generated some to fall to become silted up layer in channel bar according to the layer parameter that falls to become silted up；River course parameter, channel bar parameter, fall the layer parameter that becomes silted up be respectively used to set river course, channel bar, fall the geometric shape of layer of becoming silted up.River course, channel bar are successively generated by the modeling method based on target and fall the layer that becomes silted up, the distribution of geologic body is constrained in combination with braided stream configuration pattern, when generating channel bar, channel bar can only substitute pigtail stream band and ensure the integrality and independence of channel bar, generation fall become silted up layer when, the layer that falls to become silted up can only substitute channel bar and ensure to fall silt layer integrality and independence, make analog result truer, model accuracy can be improved, so as to improve recovery ratio.
Description
Technical field
The present invention relates to Reservoir description field, more particularly, to the modeling side that a kind of braided stream endo conformation is laddering
Method and system.
Background technology
Since famous fluviology expert Miall in 1985 proposes the concept and research method of reservoir architecture, both at home and abroad very
More scholars have carried out research to all kinds river-delta sandbody endo conformation, are especially obtained in terms of meandering river sand body
Substantial amounts of achievement in research and in facies modelization, the river model of wherein meandering stream to be with fastest developing speed, has some achievements to turn
Turn to commercial software.The modeling method (Fluvsim) based on target of C.V.Deutsch designs can preferably characterize difference
The Metallogenic relations of reservoir architecture unit, it is a kind of important Fluvial Reservoir Modeling method.The country is answered using the arthmetic statement
There are many successful cases in terms of miscellaneous river course form and prediction river course reservoir distribution.But current Braided River Sandbodies reservoir endo conformation
Achievement in research focuses primarily upon made ground and outcrop data, and underground braided stream reservoir endo conformation is studied still in exploration
In the stage, the research of reservoir endo conformation three-dimensional geological model is less, not yet forms the simulation pigtail stream band of complete set, channel bar and falls
The modeling method of silt layer geometric shape, it is difficult to meet that reservoir actual configuration three-dimensional geological model carries out reservoir numerical simulation, analysis
Needed by remaining oil distribution forecast in the unit of endo conformation control.
Therefore, a kind of modeling method of braided stream endo conformation is urgently proposed, to solve pigtail stream band, channel bar and fall the layer that becomes silted up
Geometric shape and distribution problem.
The content of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, a kind of laddering modeling side of braided stream endo conformation is proposed
Method and system, solves above-mentioned technical problem of the prior art.
To reach above-mentioned technical purpose, technical scheme provides a kind of braided stream endo conformation laddering modeling
Method, including：
S1, the three-dimensional grid model for establishing work area；
S2, if arroyo generated in the default pigtail stream region of three-dimensional grid model according to river course parameter, if arroyo
Interlaced superposition forms pigtail stream band, and river course parameter is used for the geometric shape for setting river course；
S3, some channel bars are generated in river course according to channel bar parameter, channel bar parameter is used for the geometric shape for setting channel bar；
S4, according to the layer parameter that falls to become silted up generated in channel bar it is some fall to become silted up layer, the layer parameter that falls to become silted up, which is used to set, falls the several of layer of becoming silted up
What form.
The present invention also provides a kind of braided stream endo conformation laddering modeling, including：
Module is established in work area：Establish the three-dimensional grid model in work area；
Module is established in river course：If dry river is generated in the default pigtail stream region of three-dimensional grid model according to river course parameter
Road, if the interlaced superposition in arroyo forms pigtail stream band, river course parameter is used for the geometric shape for setting river course；
Channel bar establishes module：Some channel bars are generated in river course according to channel bar parameter, channel bar parameter is used to set channel bar
Geometric shape；
Fall the layer that becomes silted up and establish module：According to the layer parameter that falls to become silted up generated in channel bar it is some fall to become silted up layer, the layer parameter that falls to become silted up is used to set
Put the geometric shape of silt layer.
Compared with prior art, beneficial effects of the present invention include：River is successively generated by the modeling method based on target
Road, channel bar and fall the layer that becomes silted up, the distribution of geologic body constrained in combination with braided stream configuration pattern, makes analog result truer,
Model accuracy can be improved, so as to improve recovery ratio, the geometric shape of each configurational unit inside braided stream is effectively subjected to essence
Carefully portray.
Brief description of the drawings
Fig. 1 is a kind of laddering modeling method flow chart of braided stream endo conformation provided by the invention；
Fig. 2 is a kind of laddering modeling structured flowchart of braided stream endo conformation provided by the invention.
In accompanying drawing：1st, the laddering modeling of braided stream endo conformation, 11, work area establish module, 12, river course establish mould
Block, 13, channel bar establish module, 14, fall the layer that becomes silted up and establish module.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The invention provides the modeling method that a kind of braided stream endo conformation is laddering, including：
S1, the three-dimensional grid model for establishing work area；
S2, if arroyo generated in the default pigtail stream region of three-dimensional grid model according to river course parameter, if arroyo
Interlaced superposition forms pigtail stream band, and river course parameter is used for the geometric shape for setting river course；
S3, some channel bars are generated in river course according to channel bar parameter, channel bar parameter is used for the geometric shape for setting channel bar；
S4, according to the layer parameter that falls to become silted up generated in channel bar it is some fall to become silted up layer, the layer parameter that falls to become silted up, which is used to set, falls the several of layer of becoming silted up
What form.
The laddering modeling method of braided stream endo conformation of the present invention, in step S1：
With petrel modeling softwares, the three-dimensional grid model in work area is established according to the scale in work area and geometric shape,
Specifically, establishing a work area in three dimensions in embodiments of the invention, three dimensions has three dimensions of x, y, z axle, x-axis
East and West direction is represented, y-axis represents north-south, and z-axis, which is represented perpendicular to x, y plane longitudinal direction, the length (East and West direction) in work area, is
2000m, width (north-south) are 2000m, and thickness (longitudinal direction) is 30m；Work area is divided into some grids, and each sizing grid is
20m × 20m × 0.1m (length 20m, width 20m, thickness 0.1m), such grid one shares 3 × 106It is individual, form work area
Three-dimensional grid model, some grid cells are included in three-dimensional grid model, the measurement of size is carried out using grid cell to be facilitated
Fine geological model is established on ground；The size of grid can be adjusted according to the required precision of model.
The laddering modeling method of braided stream endo conformation of the present invention, in step S2：
River course parameter includes river course direction, river course amplitude, river course wavelength, river width and river course thickness, and river course direction is
The azimuth of river course principal direction, the degree that river course amplitude controlling river course is bent in the plane, river course wavelength control river course is at one
Development length in cycle, mean breadth and mean depth when river width, river course thickness are respectively river course bankfull current, river
Road width, the ratio of river course thickness are the first preset value；
The azimuthal number of degrees of the river course principal direction distribution (Probability ＆ Statistics concept) triangular in shape in multiple river courses, multiple river courses
The distribution triangular in shape of river course amplitude, the river course wavelength distribution triangular in shape in multiple river courses, the river width in multiple river courses is in three
Angular distribution, the river course thickness distribution triangular in shape in multiple river courses, the Triangle-Profile of each river course parameter make the mould in multiple river courses
It is fitted physics and chemistry；
The sexual development specifically, more phase single river channels are gone around on vertical, ultimately forms pigtail stream band, therefore establish multiple river courses
Model and limited within the specific limits then formed pigtail stream band model；If dry river is generated by the modeling method based on target
Road, it is 40% to set all river course microfacies ratio shared in sedimentary system in work area, and river course amplitude controlling river course is in plane
The degree of upper bending, river course amplitude is more big, and river course is more bent, extension of the river course wavelength control river course in a cycle (2 π)
Length, the development length in the more long then river course of river course wavelength are longer；Degree of crook is very low in the plane in river course in braided stream, several
Without undulation, river course direction and river course amplitude may be configured as smaller, and river course wavelength is set can be with larger；River course is on section
Geometric shape to push up flat convex lenticular body shape, it is generally the case that the thickness and width in river course has certain correlation, ginseng
Examine domestic and international expert and the flakiness ratio in river course is obtained to the empirical equation in the achievement in research of sandy braided river, then can use river course wide
Degree constrains river course thickness, so as to constrain the section geometric shape of pigtail stream band, reduces the uncertainty of river model；Pass through through
It is usually 120~380m, river width average out to 220m to test data and obtain the width in river course, river width, the ratio of river course thickness
It is 40~100 to be worth for the first preset value, the first preset value；According to braided stream configuration pattern, pigtail fluid stream channel is developed inside work area,
Therefore when generating river course, if generating arroyo in the default pigtail stream region of the three-dimensional grid model in work area, river course is limited
In default pigtail stream region in work area, the bounds of the default pigtail stream region limitation pigtail stream band does not allow pigtail stream band
Arbitrarily occur so that the modeling of pigtail stream band more meets truth.
The laddering modeling method of braided stream endo conformation of the present invention, in step S3：
The geometric shape of channel bar cross section is defined as ellipse, and the geometric shape of channel bar section is in the convex lenticular body of bottom flat-top
Shape, channel bar parameter include channel bar direction, channel bar width, channel bar length and channel bar thickness, and channel bar direction is the length of channel bar cross section
The azimuth of axle, channel bar width be channel bar cross section minor axis length, channel bar length be channel bar cross section long axis length, channel bar
Width, the ratio of channel bar length are the second preset value, and channel bar width, the ratio of channel bar thickness are the 3rd preset value；
The channel bar direction distribution triangular in shape of multiple channel bars, the channel bar width distribution triangular in shape of multiple channel bars, Duo Gexin
The channel bar length distribution triangular in shape on beach, the channel bar thickness distribution triangular in shape of multiple channel bars, the triangle point of each channel bar parameter
Cloth rationalizes the simulation of multiple channel bars；
Specifically, generating some channel bars by the modeling method based on target, all channel bar microfacies are set to be sunk in work area
Shared ratio is 15% in product system, and channel bar width, channel bar length are found by outcrop and made ground statistical analysis
With certain correlation, channel bar width, channel bar thickness also have certain correlation, and rule of thumb formula obtains the length-width ratio of channel bar
For the second preset value, channel bar width, the ratio of channel bar thickness are the 3rd preset value；Channel bar direction is generally -30 °~30 °, channel bar
Width is 108m~500m, channel bar width average out to 280m, and channel bar length, channel bar width ratio about 2~5, channel bar width, the heart
Beach thickness ratio is about 20~30；According to braided stream configuration pattern, channel bar is developed in inside of the pigtail stream with river course, therefore in the generation heart
During beach, some channel bars are generated in river course, and to ensure channel bar integrality and independence (i.e. channel bar is complete and each channel bar does not weigh
Close).
The laddering modeling method of braided stream endo conformation of the present invention, in step S4：
The geometric shape of layer cross section of falling to become silted up is defined as ellipse, and the geometric shape for the layer section that fall to become silted up is defined as sharp edge, falls
Silt layer parameter includes falling silt layer direction, the slice width degree that falls to become silted up, the layer length that falls to become silted up, fall to become silted up thickness degree, and the layer direction that fall to become silted up is to fall to become silted up layer horizontal stroke
The azimuth of the major axis in section, the slice width degree that falls to become silted up are to fall to become silted up the minor axis length of layer cross section, and the layer length that falls to become silted up is that to fall the layer that becomes silted up transversal
The long axis length in face, the slice width degree that falls to become silted up, the ratio for the layer length that falls to become silted up are the 4th preset value；
Specifically, by modeling method based on target generate it is some fall to become silted up layer, set all to fall to become silted up layer microfacies in work area
Shared ratio is 8% in interior sedimentary system, and fall to become silted up layer very thin thickness and form on section have 2 kinds：Nearly horizontal and arched roof
Formula, therefore refer to form using sharp edge as its section in modeling；By substantial amounts of literature survey, it is found that falling layer length of becoming silted up accounts for institute
It is 40%~100% in the ratio of the length of channel bar, to be concentrated the most more than 70%；Channel bar width where the slice width degree that falls to become silted up accounts for
30%~90%, focus mostly on 60%~80%；The layer length that falls to become silted up is 150~400m, and fall to become silted up layer length average out to 300m；Fall to become silted up
Slice width degree is 50~180m, and fall to become silted up slice width degree average out to 125m；The thickness degree that falls to become silted up is 0.1~0.4m, and fall to become silted up thickness degree average out to
0.25m；Fall to become silted up layer length, the layer width ratio that fall to become silted up is about 2.3, fall to become silted up layer direction and place channel bar cross section long axis direction it is basic
Unanimously, angle is less than 20 °, mostly 0 °~10 °；According to braided stream configuration pattern, the layer that falls to become silted up is developed in the inside of channel bar, therefore
Generation fall to become silted up layer when, generated in channel bar it is some fall to become silted up layer, and to ensure that falling the integrality of silt layer and independence (it is complete to fall the layer that becomes silted up
It is whole and respectively to fall the layer that becomes silted up misaligned).
The present invention also provides a kind of braided stream endo conformation laddering modeling 1, including：
Module 11 is established in work area：Establish the three-dimensional grid model in work area；
Module 12 is established in river course：If dry river is generated in the default pigtail stream region of three-dimensional grid model according to river course parameter
Road, if the interlaced superposition in arroyo forms pigtail stream band, river course parameter is used for the geometric shape for setting river course；
Channel bar establishes module 13：Some channel bars are generated in river course according to channel bar parameter, channel bar parameter is used to set channel bar
Geometric shape；
Fall the layer that becomes silted up and establish module 14：According to the layer parameter that falls to become silted up generated in channel bar it is some fall to become silted up layer, fall the layer parameter that becomes silted up and be used for
Set and fall the geometric shape of layer of becoming silted up.
The laddering modeling 1 of braided stream endo conformation of the present invention, river course is established in module 12：
River course parameter includes river course direction, river course amplitude, river course wavelength, river width and river course thickness, and river course direction is
The azimuth of river course principal direction, the degree that river course amplitude controlling river course is bent in the plane, river course wavelength control river course is at one
Development length in cycle, mean breadth and mean depth when river width, river course thickness are respectively river course bankfull current, river
Road width, the ratio of river course thickness are the first preset value；Geometric shape of the river course on section is the flat convex lenticular body shape in top.
The laddering modeling 1 of braided stream endo conformation of the present invention, channel bar are established in module 13：
The geometric shape of channel bar cross section is defined as ellipse, and the geometric shape of channel bar section is the convex lenticular body of bottom flat-top
Shape, channel bar parameter include channel bar direction, channel bar width, channel bar length and channel bar thickness, and channel bar direction is the length of channel bar cross section
The azimuth of axle, channel bar width be channel bar cross section minor axis length, channel bar length be channel bar cross section long axis length, channel bar
Width, the ratio of channel bar length are the second preset value, and channel bar width, the ratio of channel bar thickness are the 3rd preset value.
The laddering modeling 1 of braided stream endo conformation of the present invention, falls the layer that becomes silted up and establishes in module 14：
The geometric shape of layer cross section of falling to become silted up is defined as ellipse, and the geometric shape for the layer section that fall to become silted up is sharp edge, falls the layer that becomes silted up
Parameter includes falling silt layer direction, the slice width degree that falls to become silted up, the layer length that falls to become silted up, fall to become silted up thickness degree, and the layer direction that fall to become silted up is to fall to become silted up layer cross section
Major axis azimuth, the slice width degree that falls to become silted up is to fall to become silted up the minor axis length of layer cross section, and the layer length that falls to become silted up is to fall to become silted up layer cross section
Long axis length, the slice width degree that falls to become silted up, the ratio for the layer length that falls to become silted up are the 4th preset value.
Compared with prior art, beneficial effects of the present invention include：River is successively generated by the modeling method based on target
Road, channel bar and fall the layer that becomes silted up, the distribution of geologic body constrained in combination with braided stream configuration pattern, makes analog result truer,
Model accuracy can be improved, so as to improve recovery ratio, the geometric shape of each configurational unit inside braided stream is effectively subjected to essence
Carefully portray.
The embodiment of present invention described above, is not intended to limit the scope of the present invention..Any basis
The various other corresponding changes and deformation that the technical concept of the present invention is made, should be included in the guarantor of the claims in the present invention
In the range of shield.
Claims (8)
- A kind of 1. laddering modeling method of braided stream endo conformation, it is characterised in that including：S1, the three-dimensional grid model for establishing work area；S2, if arroyo generated in the default pigtail stream region of the three-dimensional grid model according to river course parameter, if arroyo Interlaced superposition forms pigtail stream band, and river course parameter is used for the geometric shape for setting river course；S3, some channel bars are generated in river course according to channel bar parameter, the channel bar parameter is used for the geometric shape for setting channel bar；S4, according to the layer parameter that falls to become silted up generated in channel bar it is some fall to become silted up layer, it is described fall become silted up layer parameter be used for set fall to become silted up the several of layer What form.
- 2. the laddering modeling method of braided stream endo conformation as claimed in claim 1, it is characterised in that in step S2：The river course parameter includes river course direction, river course amplitude, river course wavelength, river width and river course thickness, the river course side To the azimuth for river course principal direction, degree that the river course amplitude controlling river course is bent in the plane, the river course wavelength control Development length of the river course processed in a cycle, the being averaged when river width, river course thickness are respectively river course bankfull current Width and mean depth, the river width, the ratio of river course thickness are the first preset value.
- 3. the laddering modeling method of braided stream endo conformation as claimed in claim 1, it is characterised in that in step S3：The geometric shape of channel bar cross section is defined as ellipse, and the geometric shape of channel bar section is the convex lenticular body shape of bottom flat-top, The channel bar parameter includes channel bar direction, channel bar width, channel bar length and channel bar thickness, and the channel bar direction is channel bar cross section Major axis azimuth, the channel bar width is the minor axis length of channel bar cross section, and the channel bar length is channel bar cross section Long axis length, the channel bar width, the ratio of channel bar length are the second preset value, the channel bar width, the ratio of channel bar thickness For the 3rd preset value.
- 4. the laddering modeling method of braided stream endo conformation as claimed in claim 1, it is characterised in that in step S4：The geometric shape of layer cross section of falling to become silted up is defined as ellipse, and the geometric shape for the layer section that fall to become silted up is sharp edge, described to fall to become silted up layer Parameter includes falling silt layer direction, the slice width degree that falls to become silted up, the layer length that falls to become silted up, fall to become silted up thickness degree, it is described fall layer direction of becoming silted up be to fall to become silted up layer horizontal stroke The azimuth of the major axis in section, it is described fall the slice width degree that becomes silted up be to fall to become silted up the minor axis length of layer cross section, it is described fall layer length of becoming silted up be to fall The long axis length of silt layer cross section, it is described fall become silted up slice width degree, the ratio for the layer length that falls to become silted up be the 4th preset value.
- A kind of 5. laddering modeling of braided stream endo conformation, it is characterised in that including：Module is established in work area：Establish the three-dimensional grid model in work area；Module is established in river course：If dry river is generated in the default pigtail stream region of the three-dimensional grid model according to river course parameter Road, if the interlaced superposition in arroyo forms pigtail stream band, the river course parameter is used for the geometric shape for setting river course；Channel bar establishes module：Some channel bars are generated in river course according to channel bar parameter, the channel bar parameter is used to set channel bar Geometric shape；Fall the layer that becomes silted up and establish module：According to the layer parameter that falls to become silted up generated in channel bar it is some fall to become silted up layer, it is described fall the layer parameter that becomes silted up be used to set Put the geometric shape of silt layer.
- 6. the laddering modeling of braided stream endo conformation as claimed in claim 5, it is characterised in that module is established in river course In：The river course parameter includes river course direction, river course amplitude, river course wavelength, river width and river course thickness, the river course side To the azimuth for river course principal direction, degree that the river course amplitude controlling river course is bent in the plane, the river course wavelength control Development length of the river course processed in a cycle, the being averaged when river width, river course thickness are respectively river course bankfull current Width and mean depth, the river width, the ratio of river course thickness are the first preset value.
- 7. the laddering modeling of braided stream endo conformation as claimed in claim 5, it is characterised in that channel bar establishes module In：The geometric shape of channel bar cross section is defined as ellipse, and the geometric shape of channel bar section is the convex lenticular body shape of bottom flat-top, The channel bar parameter includes channel bar direction, channel bar width, channel bar length and channel bar thickness, and the channel bar direction is channel bar cross section Major axis azimuth, the channel bar width is the minor axis length of channel bar cross section, and the channel bar length is channel bar cross section Long axis length, the channel bar width, the ratio of channel bar length are the second preset value, the channel bar width, the ratio of channel bar thickness For the 3rd preset value.
- 8. the laddering modeling of braided stream endo conformation as claimed in claim 5, it is characterised in that fall the layer that becomes silted up and establish mould In block：The geometric shape of layer cross section of falling to become silted up is defined as ellipse, and the geometric shape for the layer section that fall to become silted up is sharp edge, described to fall to become silted up layer Parameter includes falling silt layer direction, the slice width degree that falls to become silted up, the layer length that falls to become silted up, fall to become silted up thickness degree, it is described fall layer direction of becoming silted up be to fall to become silted up layer horizontal stroke The azimuth of the major axis in section, it is described fall the slice width degree that becomes silted up be to fall to become silted up the minor axis length of layer cross section, it is described fall layer length of becoming silted up be to fall The long axis length of silt layer cross section, it is described fall become silted up slice width degree, the ratio for the layer length that falls to become silted up be the 4th preset value.
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| CN110874505B (en) * | 2018-08-14 | 2022-11-04 | 中国石油天然气股份有限公司 | Braided river reservoir modeling method and device |
| CN111898251A (en) * | 2020-07-06 | 2020-11-06 | 中国海洋石油集团有限公司 | Envelope surface construction method based on geological prototype model |
| CN117994453A (en) * | 2023-12-26 | 2024-05-07 | 中国石油天然气集团有限公司 | Method and device for modeling braided river reservoir, electronic equipment and storage medium |
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