CN105069802B - A kind of point bar discriminating direction method based on geometrical morphological analysis - Google Patents
A kind of point bar discriminating direction method based on geometrical morphological analysis Download PDFInfo
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- CN105069802B CN105069802B CN201510507459.5A CN201510507459A CN105069802B CN 105069802 B CN105069802 B CN 105069802B CN 201510507459 A CN201510507459 A CN 201510507459A CN 105069802 B CN105069802 B CN 105069802B
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- G—PHYSICS
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10032—Satellite or aerial image; Remote sensing
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Abstract
The present invention relates to a kind of point bar discriminating direction method based on geometrical morphological analysis, comprise the following steps：1) the planar distribution scope of target point bar is determined；2) the bending section arc midpoint O in the closest river course of target point bar is determined, closest river course tangent line MN is made with point O；3) point C and D is used by the length section AB trisections of target point bar；4) cross target point dam border two-end-point and make two strike lines respectively, translate wherein one strike line, intersect two strike lines, cross intersection point P and make angular bisector PQ；5) PC, PD are connected, compares ∠ CPQ and ∠ DPQ, if ∠ CPQ>∠ DPQ, then into step 6)；Otherwise, into step 7)；6) CO is connected, compares ∠ COM and ∠ CON, if ∠ COM<∠ CON, then target point bar direction is along ray ON directions；Otherwise, target point bar direction is along ray OM directions；7) DO is connected, compares ∠ DOM and ∠ DON, if ∠ DOM<∠ DON, then target point bar direction is along ray ON directions, otherwise, and target point bar direction is along ray OM directions.In summary, it the composite can be widely applied in point bar discriminating direction.
Description
Technical field
The present invention relates to a kind of point bar discriminating direction method, especially with regard to a kind of point bar side based on geometrical morphological analysis
To method of discrimination.
Background technology
Meandering stream deposit always is the key object of oil gas research, and the differentiation for covalency of meandering is as judging material resource side
To and river development situation one of important evidence, there is important directive significance to oil and gas development work.
The differentiation of meander covalency mainly includes the ancient flow direction differentiation of meandering stream and now two aspects of flow direction differentiation.For song
Flow river paleocurrent to differentiation, forefathers are mainly realized by four kinds of modes, the first be using some phenomenons on rock core, including
According to diagonal bedding, the specific sedimentary structure in sand streak stratification etc. of climbing part, gravel align and Skeletal arrangement
Feature is judged.Second is judged according to the geometrical relationship on seismic profile between foreset reflection is intersected.The third
It is many well resistivity imaging logging data of integrated application, the occurrence of combined structure axis is judged.4th kind is according to rock
The relation of the magnetic fabric of stone, anisotropy of magnetic susceptibility and paleocurrent direction, by Magnetic Fabric Analysis, sentences to paleocurrent direction
It is disconnected.
Flow direction differentiation can be realized meandering stream according to the change of landform, geomorphologic map or plane topographic contour now, specific side
Method is similar with general river direction differentiation.Following four is mainly had according to the principle that landform, geomorphologic map are differentiated：1. from ground
Gesture eminence flows to lower；2. flow to ocean from land；3. along meander covalency direction, angle is less than 90 ° between mainstream and tributary；4.
Lower reaches of river is wider compared with upper river.It is mainly according to the principle that plane topographic contour is differentiated：Flowed in mountain valley in river
Dynamic, the physical features that river flows through place is lower than both sides, therefore river direction is opposite with the bending direction of contour.
The differentiation in made ground point bar direction can effectively indicate the flow direction of meandering stream, but be presently mainly from macroscopic angle
Degree, according to the principle gradually reduced along river bearing of trend absolute elevation, with reference to meandering stream from the configuration in upstream to downstream,
Point bar direction is judged, this method can not be realized from differentiation of the local small yardstick to point bar direction, while yardstick is excessively
Macroscopic view, with certain uncertainty.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of reasonable, accurate, workable from local small yardstick
Differentiate the point bar discriminating direction method based on geometrical morphological analysis in point bar direction.
To achieve the above object, the present invention takes following technical scheme：A kind of point bar direction based on geometrical morphological analysis
Method of discrimination, comprises the following steps：
1) the target point bar in the range of target meandering stream is chosen on satellite photo, the planar distribution model of target point bar is determined
Enclose；
2) the closest river course scope of object observing point bar, determines the midpoint O of the bending section arc in closest river course, with midpoint
O makees the tangent line MN in closest river course；
3) the length section AB of target point bar is determined, by length section AB trisections, trisection point is denoted as point C and point D respectively；
4) determine that target point bar, close to the target point bar border in closest river course, crosses the two-end-point difference on target point dam border
Make two strike lines of target point bar, translate a strike line therein so that two strike lines intersect, and intersection point is designated as point P, mistake
Intersection point P makees the intersecting bisector of angle for including target point bar formed of two strike lines, is designated as PQ；
5) connection intersection point P and length section AB two trisection point C and D, PC and PQ form angle ∠ CPQ, PD and PQ respectively
Angle ∠ DPQ are formed, compare ∠ CPQ and ∠ DPQ size, if ∠ CPQ>∠ DPQ, then into step 6)；Otherwise, into step
7)；
6) tie point C and point O, forms ∠ COM and ∠ CON, compares ∠ COM and ∠ CON size, if ∠ COM<∠ CON,
Then the direction of target point bar is consistent with ray ON direction；Otherwise, the direction of target point bar is consistent with ray OM direction；
7) tie point D and point O, forms ∠ DOM and ∠ DON, compares ∠ DOM and ∠ DON size, if ∠ DOM<∠ DON,
Then the direction of target point bar is consistent with ray ON direction, otherwise, and the direction of target point bar is consistent with ray OM direction.
The step 3) in target point bar length section AB pass through target point dam width degree central point, be parallel to target point
The linking objective point bar abutment in dam river valley maximum curvature direction and the line segment of target point bar dam tail.
The present invention is due to taking above technical scheme, and it has advantages below：1st, the present invention is due to using according to target point
The satellite photo on dam, determines the planar distribution scope of target point bar, and then differentiate have to point bar direction from local small yardstick
Effect improves the accuracy of target point bar discriminating direction.2nd, the planar distribution scope of the invention due to using according to target point bar,
According to the corner dimension formed between the Points And lines on Points And lines certain on target point bar and the closest river course of target point bar
The direction of target point bar is determined, the geometric shape based on target point bar is quantified the differentiation in target point bar direction so that sentenced
Disconnected method is specifically easy, and judged result is accurately and reliably.In summary, the present invention can be widely applied to the differentiation in point bar direction
In.
Brief description of the drawings
Fig. 1 is the satellite photo figure of the target meandering stream of the present invention；
Fig. 2 is the planar distribution schematic diagram in the target point bar direction of the present invention；
Fig. 3 is the differentiation schematic diagram in the target point bar direction of the present invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
As shown in Figures 1 to 3, a kind of point bar discriminating direction method based on geometrical morphological analysis of present invention offer, including with
Lower step：
1) the target point bar in the range of target meandering stream is chosen on satellite photo, the planar distribution model of target point bar is determined
Enclose, it is desirable to which target point bar is than more visible on satellite photo, and form is more complete, with certain development degree.
2) scope in the closest river course of observation development target point bar, determines the midpoint O of the bending section arc in closest river course,
Make the tangent line MN in closest river course with midpoint O.
3) the length section AB of target point bar is determined, by length section AB trisections, trisection point is denoted as point C and point D respectively.
Wherein, the length section AB of target point bar passes through the central point of target point dam width degree, is parallel to target point bar river valley
The linking objective point bar abutment in maximum curvature direction and the line segment of target point bar dam tail.
4) determine that target point bar, close to the target point bar border in closest river course, the two-end-point on target point bar border is distinguished
Point R and point K are designated as, the two-end-point for crossing target point dam border makees two strike lines of target point bar respectively, is designated as RT and KS.Translate it
In a strike line (RT or KS) so that two strike lines intersect, and intersection point is designated as point P, cross intersection point P and make two strike lines and intersect institute
The bisector of angle for including target point bar formed, is designated as PQ.
5) connection intersection point P and length section AB two trisection point C and D, PC and PQ form angle ∠ CPQ, PD and PQ respectively
Angle ∠ DPQ are formed, compare ∠ CPQ and ∠ DPQ size, if ∠ CPQ>∠ DPQ, then into step 6)；Otherwise, into step
7)。
6) tie point C and point O, forms ∠ COM and ∠ CON, compares ∠ COM and ∠ CON size, if ∠ COM<∠ CON,
Then the direction of target point bar is consistent with ray ON direction；Otherwise, the direction of target point bar is consistent with ray OM direction.
7) tie point D and point O, forms ∠ DOM and ∠ DON, compares ∠ DOM and ∠ DON size, if ∠ DOM<∠ DON,
Then the direction of target point bar is consistent with ray ON direction, otherwise, and the direction of target point bar is consistent with ray OM direction.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all
It can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not be excluded
Outside protection scope of the present invention.
Claims (1)
1. a kind of point bar discriminating direction method based on geometrical morphological analysis, comprises the following steps：
1) the target point bar in the range of target meandering stream is chosen on satellite photo, the planar distribution scope of target point bar is determined；
2) the closest river course scope of object observing point bar, determines the midpoint O of the bending section arc in closest river course, is made with midpoint O
The tangent line MN in closest river course；
3) the length section AB of target point bar is determined, by length section AB trisections, trisection point is denoted as point C and point D respectively；The mesh
The length section AB on punctuate dam passes through the central point of target point dam width degree, is the company parallel to target point bar river valley maximum curvature direction
Connect the line segment of target point bar abutment and target point bar dam tail；
4) target point bar is determined close to the target point bar border in closest river course, and the two-end-point for crossing target point dam border makees mesh respectively
Two strike lines on punctuate dam, translate a strike line therein so that two strike lines intersect, and intersection point is designated as point P, cross intersection point
P makees the intersecting bisector of angle for including target point bar formed of two strike lines, is designated as PQ；
5) connection intersection point P and length section AB two trisection point C and D, PC and PQ form angle ∠ CPQ respectively, and PD and PQ are formed
Angle ∠ DPQ, compare ∠ CPQ and ∠ DPQ size, if ∠ CPQ>∠ DPQ, then into step 6)；Otherwise, into step 7)；
6) tie point C and point O, forms ∠ COM and ∠ CON, compares ∠ COM and ∠ CON size, if ∠ COM<∠ CON, then mesh
The direction on punctuate dam is consistent with ray ON direction；Otherwise, the direction of target point bar is consistent with ray OM direction；
7) tie point D and point O, forms ∠ DOM and ∠ DON, compares ∠ DOM and ∠ DON size, if ∠ DOM<∠ DON, then mesh
The direction on punctuate dam is consistent with ray ON direction, otherwise, and the direction of target point bar is consistent with ray OM direction.
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |