CN104831677A - Unsymmetrical riverway modeling method - Google Patents
Unsymmetrical riverway modeling method Download PDFInfo
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- CN104831677A CN104831677A CN201510219339.5A CN201510219339A CN104831677A CN 104831677 A CN104831677 A CN 104831677A CN 201510219339 A CN201510219339 A CN 201510219339A CN 104831677 A CN104831677 A CN 104831677A
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Abstract
The invention discloses an unsymmetrical riverway modeling method. The method comprises the following steps of 1, modifying geometrical shape parameters of a natural levee; 2, modifying a phase code; 3, additionally setting a parameter mt to control the distribution type of a riverway wing deposit body. The geometrical shape of an unsymmetrical riverway is really described, a basis for precisely describing the space layout of a riverway sand body and calculating geological reserve is provided, and the method can be widely applied to the technical field of oil reservoir description.
Description
Technical field
The present invention relates to Reservoir description field, particularly relate to a kind of asymmetric river course modeling method.
Background technology
Reservoir geologic modeling is as the core content of approach in modern reservoir description research, Chinese scholars has carried out large quantifier elimination, wherein, C.V.Deutsch in 1996, on the basis of fluvial facies model, devises the level analogy method (Fluvsim) for the based target of river with complicated modeling.This stochastic modeling method can characterize the Metallogenic relations of different reservoir element of construction preferably, and is successfully applied.Existing Fluvsim can portray the geometric shape in river course preferably, but cannot portray the depositional model that river course alar part one-sided (asymmetric) deposits.And the depositional model in this asymmetric river course is appeared in the wild and subsurface information is all confirmed.Such as C.J.I.Wiggers 2009 to the integrated geological interpretation in Tremp-Graus basin in find, when thing source abundance, if side, river course occur dam body barrier or both sides, river course landform drop larger, then the alar part lithosomic body in river course only appears in side, river course, thus forms the depositional model of river course alar part single-sided deposition.
In view of the problems referred to above that existing Fluvial Reservoir Modeling algorithm Fluvsim exists, urgently study a kind of new river course modeling method, to solve the problem of portraying asymmetric river course geometric shape.
Summary of the invention
The object of the invention is the deficiency in order to overcome above-mentioned background technology, a kind of asymmetric river course modeling method being provided, featuring the geometric shape in asymmetric river course truly, provide the foundation for the spatial of fine description river channel sand and oil in place calculate.
One provided by the invention asymmetric river course modeling method, comprises the following steps: step one, amendment natural levee geometric shape parameter; Step 2, amendment phase code; Step 3, set up parameter mt (modeling type, types of models) and control river course alar part lithosomic body distribution pattern.
In technique scheme, in described step one, controlled three parameters of natural levee geometric shape by change, set up river course alar part single-sided deposition model.
In technique scheme, in described step one, by natural levee height more than height above sea level datum is set to 0, realize river course alar part and river course top surface being parallel.
In technique scheme, in described step one, by arranging river course end face with the ratio of the embankment thickness of lower part and river course thickness, control river course alar part lithosomic body thickness.
In technique scheme, in described step 2, river course and natural levee engagement edge, natural levee code are all rewritten as river course code.
In technique scheme, in described step 3, when mt is 0, the position random distribution of river course alar part single-sided deposition; When mt is 1, the natural levee in the river course that all simulations produce all only produces in left side; When mt is 2, the natural levee in the river course that all simulations produce all only produces on right side.
In technique scheme, in described step 3, when mt is 0, if the river course number that simulation produces is odd number, on the left of river course, produces natural levee, if river course number is even number, on the right side of river course, produce natural levee.
The present invention asymmetric river course modeling method, has following beneficial effect: in view of natural levee has similar geometric shape with river course alar part lithosomic body, therefore by modifying to the geometric shape of natural levee, obtain the geometric shape of river course alar part lithosomic body.Simultaneously in order to make river course alar part lithosomic body appear at side, river course, a controling parameters being set in source program, the distributing position of river course alar part lithosomic body is controlled.Asymmetric river course modeling method after improvement features the geometric shape in asymmetric river course more realistically, provides the foundation for the spatial of fine description river channel sand and oil in place calculate.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the present invention asymmetric river course modeling method;
Fig. 2 is the cross section geometric shape schematic diagram of river course and natural levee in the specific embodiment of the present invention asymmetric river course modeling method;
Fig. 3 is the cross section geometric shape schematic diagram of the river course alar part lithosomic body in the specific embodiment of the present invention asymmetric river course modeling method after step one;
Fig. 4 is the plan view of alar part single-sided deposition analog result in river course in the specific embodiment of the present invention asymmetric river course modeling method;
Fig. 5 is the sectional side elevation of alar part single-sided deposition analog result in river course in the specific embodiment of the present invention asymmetric river course modeling method;
Fig. 6 is the specific embodiment analog result of the present invention asymmetric river course modeling method is the cross-sectional figure deposited on the right side of river course alar part;
Fig. 7 is the specific embodiment analog result of the present invention asymmetric river course modeling method is the cross-sectional figure deposited on the left of river course alar part;
Fig. 8 is that specific embodiment adopts the analog result contrast schematic diagram of classical Fluvsim algorithm herein;
Fig. 9 be herein specific embodiment adopt the present invention asymmetric river course modeling method analog result contrast schematic diagram;
Figure 10 is the cross-sectional figure of asymmetric channel deposit pattern in the specific embodiment of the present invention asymmetric river course modeling method;
Figure 11 is the outcrop display figure of asymmetric channel deposit in the specific embodiment of the present invention asymmetric river course modeling method.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail, but this embodiment should not be construed as limitation of the present invention.
See Fig. 1, the present invention asymmetric river course modeling method, comprises the following steps:
Step one, amendment natural levee geometric shape parameter;
Controlled three parameters of natural levee geometric shape by change, set up river course alar part single-sided deposition model: by natural levee height more than height above sea level datum is set to 0, realize river course alar part and river course top surface being parallel; By arranging river course end face with the ratio of the embankment thickness of lower part and river course thickness, control river course alar part lithosomic body thickness;
Step 2, amendment phase code;
River course and natural levee engagement edge, natural levee code are all rewritten as river course code;
Step 3, set up parameter mt and control river course alar part lithosomic body distribution pattern.
When mt is 0, the position random distribution (if the river course number that simulation produces is odd number, produces natural levee on the left of river course, if river course number is even number, produce natural levee on the right side of river course) of river course alar part single-sided deposition; When mt is 1, the natural levee in the river course that all simulations produce all only produces in left side; When mt is 2, the natural levee in the river course that all simulations produce all only produces on right side.
Below in conjunction with specific embodiment, the principle of the invention is elaborated:
One, natural levee geometric shape parameter is revised:
The object setting up river course alar part single-sided deposition model can be reached by the parameter of change control natural levee geometric shape.As shown in Figure 2, the geometric shape of natural levee is by three state modulator, and A refers to natural levee transverse width, i.e. one-sided development length on vertical section; B refers to the natural levee height of more than river course height above sea level datum, namely exceeds the maximum height of the natural levee of river surface, and C refers to the natural levee degree of depth of below river course height above sea level datum, namely along the deposit thickness of natural levee bearing of trend.Concrete actual geological condition is different, and the form parameter of both sides, river course is also not quite similar.The process of amendment optimum configurations is as follows:
Natural levee height B more than river course height above sea level datum is removed.Three parameters due to natural levee input data in Parameter File to obtain by angular distribution sampling, this Parameter File is as shown in table 1, the minimum value of the parameter (flh) of correspondence, most probable value, maximum value are all set to 0, river course alar part and river course top surface being parallel can be realized, and by arranging river course end face with the ratio of the embankment thickness of lower part and river course thickness, control river course alar part lithosomic body thickness, concrete outcome is see Fig. 3.
Table 1Fluvsim algorithm parameter instruction card
Just the geometric shape of river course alar part deposition can be obtained after changing the arranging of above parameter.
Two, phase code is changed:
In source program 1,2,3 is respectively the code of river course, river course and natural levee engagement edge, natural levee three kinds of phases, and the alar part deposition in river course also belongs to a part (origin cause of formation is identical with Material Source) for channel deposit, therefore need edge, river course and natural levee to regard river course as, be that the code of 2 and 3 is all converted into 1 in a program by parameter value in the process of written document.
Three, parameter mt is set up to control alar part lithosomic body distribution pattern:
In source program, after river course produces, the natural levee of both sides, river course is that behind the first left side, the right increases, and only producing natural levee in side, adding a parameter mt in Table 1 and carrying out control program to control river course.When mt is 0, the position random distribution (if the river course number that simulation produces is odd number, produces natural levee on the left of river course, if river course number is even number, produce natural levee on the right side of river course) of river course alar part single-sided deposition; When mt is 1, the natural levee in the river course that all simulations produce all only produces in left side; When mt is 2, the natural levee in the river course that all simulations produce all only produces on right side.User can to modify this parameter according to the position different situations of river course alar part deposition in concrete work area in Parameter File, and then the form of alar part deposition in control simulation result.
Concrete operation step is as follows:
1, data input:
Software interface is simulation dos interface, and the Parameter File required for input obtains table 2, obtains runnable interface.Under Parameter File being stored in current engineering catalogue, the meaning of other parameters all has explanation in Table 1.After operation, result data files will be obtained.
The Fluvsim algorithm parameter file table that table 2 the present invention calls
2, analog result display:
The result obtain operation and Various types of data files loading are to S-GeMS (Stanford Geostatistical Modeling Software, reservoir geological modeling system) in software, obtain the analog result of river course alar part single-sided deposition, specifically see Fig. 4 to Fig. 7, wherein Fig. 4 is plan view, Fig. 5 is longitudinal plan, and Fig. 6 shows river course alar part and deposits on right side, and Fig. 7 shows river course alar part and deposits in left side.The pattern of river course alar part single-sided deposition can show very well on cross section, with actual conditions relatively.
Wherein, in result data, 0 represents mud stone, 1 represents river course, the analog result of classical Fluvsim algorithm and Fig. 9 is adopted by Fig. 8 to adopt analog result two of the present invention to compare and can find, the analog result of Fig. 9 is closer to the Geological model shown by Figure 10 to Figure 11, known, relative to conventional method, final result of the present invention simulates river course alar part single-sided deposition body well.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
The content be not described in detail in this manual belongs to the known prior art of professional and technical personnel in the field.
Claims (7)
1. an asymmetric river course modeling method, is characterized in that: comprise the following steps:
Step one, amendment natural levee geometric shape parameter;
Step 2, amendment phase code;
Step 3, set up parameter mt and control river course alar part lithosomic body distribution pattern.
2. asymmetric river course according to claim 1 modeling method, is characterized in that: in described step one, is controlled three parameters of natural levee geometric shape, set up river course alar part single-sided deposition model by change.
3. asymmetric river course according to claim 2 modeling method, is characterized in that: in described step one, by natural levee height more than height above sea level datum is set to 0, realizes river course alar part and river course top surface being parallel.
4. asymmetric river course according to claim 3 modeling method, is characterized in that: in described step one, by arranging river course end face with the ratio of the embankment thickness of lower part and river course thickness, controls river course alar part lithosomic body thickness.
5. asymmetric river course according to any one of claim 1 to 4 modeling method, is characterized in that: in described step 2, and river course and natural levee engagement edge, natural levee code are all rewritten as river course code.
6. asymmetric river course according to any one of claim 1 to 4 modeling method, is characterized in that: in described step 3, when mt is 0, and the position random distribution of river course alar part single-sided deposition; When mt is 1, the natural levee in the river course that all simulations produce all only produces in left side; When mt is 2, the natural levee in the river course that all simulations produce all only produces on right side.
7. asymmetric river course according to claim 6 modeling method, it is characterized in that: in described step 3, when mt is 0, if the river course number that simulation produces is odd number, on the left of river course, produces natural levee, if river course number is even number, on the right side of river course, produce natural levee.
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Citations (3)
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| JP2003328339A (en) * | 2002-05-16 | 2003-11-19 | Kajima Corp | Method of conveying accumulated sediment of dam or the like |
| CN1912655A (en) * | 2005-08-10 | 2007-02-14 | 大庆油田有限责任公司 | Method of deposition phase control for casting sandstone oil reservoir attribute |
| CN101042048A (en) * | 2006-03-24 | 2007-09-26 | 中国石油天然气股份有限公司 | Complicated fault block fluvial facies reservoir oil water well using situation split system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003328339A (en) * | 2002-05-16 | 2003-11-19 | Kajima Corp | Method of conveying accumulated sediment of dam or the like |
| CN1912655A (en) * | 2005-08-10 | 2007-02-14 | 大庆油田有限责任公司 | Method of deposition phase control for casting sandstone oil reservoir attribute |
| CN101042048A (en) * | 2006-03-24 | 2007-09-26 | 中国石油天然气股份有限公司 | Complicated fault block fluvial facies reservoir oil water well using situation split system |
Non-Patent Citations (1)
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| 陈迪等: ""河流相建模算法Fluvsim的一种改进方法"", 《测绘与空间地理信息》 * |
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Application publication date: 20150812 |