CN104749394B - Ancient customs force measuring method and device based on longshore bar thickness quantitative approach - Google Patents
Ancient customs force measuring method and device based on longshore bar thickness quantitative approach Download PDFInfo
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Abstract
The invention provides a kind of ancient customs force measuring method and device based on longshore bar thickness quantitative approach.This method includes：According to the foundation slope of the longshore bar obtained in advance and the original thickness of longshore bar, the depth of water of cleaving at longshore bar dam crest is determined；According to the depth of water and the known conjunction good solid-line curve in field of cleaving, it is determined that wave height of cleaving；According to wave height and the known wave statistics feature of cleaving, profundal zone significant wave height is determined；According to ancient customs journey and profundal zone significant wave height, with reference to the wave forecasting formula of limited wind area water body, coefficient of wind pres is calculated；According to coefficient of wind pres and the relational expression of known coefficient of wind pres and wind speed, ancient customs power wind speed is determined.The present invention according to longshore bar thickness determines ancient customs power, being capable of more accurately quantitative reconstruction ancient customs power.
Description
Technical field
The present invention relates to Paleoenvironmental Reconstruction technical field, and longshore bar thickness quantitative square is based in particular to one kind
The ancient customs force measuring method and device of method.
Background technology
Ancient customs power is an important indicator in paleoclimate research, because geologic climate is palaeoenvironmental important component,
It is palaeoclimatic research it is significant to Paleoenvironmental Reconstruction, and Paleoenvironmental Reconstruction for understand sedimentary basin sedimentation setting,
And then instruct oil exploration to play an important role, therefore, accurately obtain ancient customs power and be very important, and palaeoclimatic reconstruction
Important part in journey, it is the problem of can not avoiding.
Quantitatively determining the method for ancient customs power in the prior art is：It is big by analyzing gravel near lake shoreline in gravel matter beach
Small distribution characteristics, the critical wave condition required for carrying certain gravel is determined according to its size distribution characteristic, and then according to this
Critical wave condition and known stormy waves relation calculate the ancient customs power to form this critical wave condition.
However, because the size distribution characteristic of deposit near lake shoreline is not only influenceed by original stormy waves, also
Flowed back by surfing, reflect wave and influenceed, therefore, the critical ripple obtained according to the size distribution characteristic of deposit near water front
Unrestrained condition can not truly reflect original ancient customs wave condition；Secondly, the gravel matter beach near lake shoreline is largely by thing
The size of the control in source, i.e. gravel is heavily dependent on the slacking in source area, handling process etc., rather than only takes
Certainly in stormy waves condition；Again, the deposit near lake shoreline is often degraded, and causes the imperfect of sedimentary record, with
As for continuous ancient customs power change procedure can not be obtained.
By above-mentioned analysis, ancient customs power can not be quantified exactly according to existing technical method.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of ancient customs based on longshore bar thickness quantitative approach
Force measuring method and device.To solve the above problems.Ancient customs power is determined according to longshore bar thickness to realize, can be obtained more
Add accurate ancient customs power.
The embodiments of the invention provide a kind of ancient customs force measuring method based on longshore bar thickness quantitative approach, including：
According to the foundation slope of the longshore bar obtained in advance and the original thickness of longshore bar, the longshore bar is determined
The depth of water of cleaving at dam crest；
According to the cleave depth of water and the known conjunction good solid-line curve in field, it is determined that wave height of cleaving；
According to cleave wave height and the known wave statistics feature, profundal zone significant wave height is determined；
According to ancient customs journey and the profundal zone significant wave height, with reference to the wave forecasting formula of limited wind area water body, calculate
To coefficient of wind pres；
According to the coefficient of wind pres and known coefficient of wind pres and wind speed relational expression, ancient customs power wind speed is determined.
Preferably, the original thickness of the longshore bar obtains as follows：
According to the deposition distribution figure of ancient deposition period, the distribution of longshore bar is determined, and draws the longshore bar
Company's well profile figure in distribution；
By the spontaneous potential curve of every mouthful of well is divided into multiple subelements in the range of longshore bar in the even well profile figure；
Bank of the region corresponding to the subelement of standard curve as the specific period will be met in the multiple subelement
Sand bar, the standard curve are the Hydrodynamic Process and petrofacies coding determination formed according to longshore bar；
The thickness of the specific period longshore bar is calculated；
Decompaction correction is carried out to the thickness of the specific period longshore bar, draws the specific period longshore bar
Original thickness.
Preferably, the wave statistics feature includes：
The wave height of cleaving is 2 times of the profundal zone significant wave height.
Preferably, the ancient customs journey determines as follows：
Using the dam crest of the longshore bar as starting point, using ancient lake water front as terminal, using the straight line where ancient customs direction as
Center line, in the range of center line ± 45 °, it is upwind with 6 ° for interval, draw a plurality of line segment；
Projected length value of the every radial line segment on ancient customs direction is measured respectively；
Using the arithmetic mean of instantaneous value of the projected length value of a plurality of line segment as ancient customs journey.
Preferably, the ancient customs direction is determined as follows：
According to the vertical line of the major axis of the longshore bar, ancient customs direction location is determined；
According to the thickness and development length on the ancient customs direction of the longshore bar, ancient customs direction direction is determined；
According to ancient customs direction location and ancient customs direction direction, ancient customs direction is determined.
Preferably, the original thickness of the foundation slope for the longshore bar that the basis obtains in advance and longshore bar, it is determined that
The depth of water of cleaving at the longshore bar dam crest includes：
Obtain the foundation slope of longshore bar and the original thickness of longshore bar；
According to equation below, the depth of water of cleaving at the longshore bar dam crest is calculated,
Wherein, t is the original thickness (m) of longshore bar, dbIt is the cleave depth of water depth of water (m), d i.e. at longshore bar dam cresttIt is
The depth of water (m) of longshore bar onshore side groove, α are the foundation slopes of longshore bar, and θ is the slope of longshore bar onshore side
Degree.
Preferably, the formula：In, tan θ=0.63, dt≈1.6db,
Wherein, t is the original thickness (m) of longshore bar, dbIt is the cleave depth of water depth of water (m), d i.e. at longshore bar dam cresttIt is
The depth of water (m) of longshore bar onshore side groove, α are the foundation slopes of longshore bar, and θ is the slope of longshore bar onshore side
Degree.
Preferably, the wave forecasting formula of the limited wind area water body includes：
Wherein, F is ancient customs journey (m), HsFor profundal zone significant wave height (m), UAFor coefficient of wind pres (m/s).
The embodiment of the present invention additionally provides a kind of ancient customs force measuring device based on longshore bar thickness quantitative approach, bag
Include：
The depth of water of cleaving determining module, for according to the original of the foundation slope of longshore bar and longshore bar obtained in advance
Thickness, determine the depth of water of cleaving at the longshore bar dam crest；
Wave height of cleaving determining module, for the depth of water and the known conjunction good solid-line curve in field of being cleaved according to, it is determined that the ripple that cleaves
It is high；
Significant wave height determining module, for wave height and the known wave statistics feature of being cleaved according to, determine profundal zone
Significant wave height；
Coefficient of wind pres determining module, for according to ancient customs journey and the profundal zone significant wave height, with reference to limited wind area water body
Wave forecasting formula, coefficient of wind pres is calculated；
Ancient customs power wind speed determining module, for according to the coefficient of wind pres and known coefficient of wind pres and wind speed relational expression,
Determine ancient customs power wind speed.
Preferably, the depth of water determining module of cleaving includes：
Acquiring unit, for obtaining the foundation slope of longshore bar and the original thickness of longshore bar；
Computing unit, for according to equation below, calculating the depth of water of cleaving at the longshore bar dam crest,
Wherein, t is the original thickness (m) of longshore bar, dbIt is the cleave depth of water depth of water (m), d i.e. at longshore bar dam cresttIt is
The depth of water (m) of longshore bar onshore side groove, α are the foundation slopes of longshore bar, and θ is the slope of longshore bar onshore side
Degree.
A kind of ancient customs force measuring method based on longshore bar thickness quantitative approach provided in an embodiment of the present invention, according to pre-
The foundation slope of the longshore bar first obtained and the original thickness of longshore bar, determine the depth of water of cleaving at longshore bar dam crest；
According to the depth of water and the known conjunction good solid-line curve in field of cleaving, it is determined that wave height of cleaving；According to wave height and the known wave statistics spy of cleaving
Sign, determines profundal zone significant wave height；According to ancient customs journey and profundal zone significant wave height, the wave forecasting with reference to limited wind area water body is public
Formula, coefficient of wind pres is calculated；According to coefficient of wind pres and known coefficient of wind pres and wind speed relational expression, ancient customs power wind speed is determined.
The present invention determines ancient customs power according to longshore bar thickness, can obtain more accurate ancient customs power.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows the ancient customs force measuring method based on longshore bar thickness quantitative approach that the embodiment of the present invention is provided
Flow chart；
Fig. 2 shows the forming process schematic diagram for the longshore bar that the embodiment of the present invention is provided；
Fig. 3 shows the flow chart for the determination longshore bar original thickness that the embodiment of the present invention is provided；
Fig. 4 shows the research area sedimentary facies distribution figure that the embodiment of the present invention is provided；
Fig. 5 shows the longshore bar distribution schematic diagram that the embodiment of the present invention is provided；
Fig. 6 shows that the longshore bar that the embodiment of the present invention is provided connects well profile schematic diagram；
Fig. 7 shows the longshore bar Hydrodynamic Explanation and standard curve schematic diagram that the embodiment of the present invention is provided；
Fig. 8 shows the good solid-line curve in conjunction field that the embodiment of the present invention is provided；
Fig. 9 shows the radial line for a certain specific period longshore bar ancient customs journey of determination that the embodiment of the present invention is provided
Section schematic diagram；
Figure 10 shows the deep water wave height and wave of different fetchs under the conditions of the limited wind area that the embodiment of the present invention is provided
Period-luminosity relation figure；
Figure 11 shows that a kind of ancient customs power based on longshore bar thickness quantitative approach that the embodiment of the present invention is provided is surveyed
Measure the structural representation of device.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
Only it is part of the embodiment of the present invention, rather than whole embodiments.The present invention being generally described and illustrated herein in the accompanying drawings
The component of embodiment can be configured to arrange and design with a variety of.Therefore, the present invention to providing in the accompanying drawings below
The detailed description of embodiment be not intended to limit the scope of claimed invention, but be merely representative of the selected of the present invention
Embodiment.Based on embodiments of the invention, what those skilled in the art were obtained on the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
For ease of understanding the present embodiment, it is thick that longshore bar is based on to one kind disclosed in the embodiment of the present invention first
The application environment for spending the ancient customs force measuring method of quantitative approach is briefly described, and this method is applied to determine lake ancient customs power
Measurement, compared with the gravel matter beach at lake strandline, longshore bar is developed away from lake shoreline, and therefore, longshore bar easily exempts from stripping
Lose and preserve；Because the forming process of longshore bar is mainly reflected in the process that stormy waves and deposit constantly feed back, and most
The thickness of whole longshore bar can reach poised state with wave size, i.e. the thickness of longshore bar and wave size is closely related.
Therefore, ancient customs power is determined according to longshore bar thickness, more accurate ancient customs power can be obtained.
A kind of ancient customs force measuring method based on longshore bar thickness quantitative approach is provided in the embodiment of the present invention, is such as schemed
Shown in 1, the method comprising the steps of S101-S105 is specific as follows：
Step S101：According to the foundation slope of the longshore bar obtained in advance and the original thickness of longshore bar, it is determined that edge
The bank sand Ba Badingchu depth of water of cleaving；
Step S102：According to the depth of water and the known conjunction good solid-line curve in field of cleaving, it is determined that wave height of cleaving；
Step S103：According to wave height and the known wave statistics feature of cleaving, profundal zone significant wave height is determined；
Step S104：According to ancient customs journey and profundal zone significant wave height, with reference to the wave forecasting formula of limited wind area water body, meter
Calculation obtains coefficient of wind pres；
Step S105：According to coefficient of wind pres and known coefficient of wind pres and wind speed relational expression, ancient customs power wind speed is determined.
According to the foundation slope of longshore bar and the original thickness of longshore bar obtained in advance in step S101, it is determined that
The depth of water of cleaving at longshore bar dam crest；
Specifically, the foundation slope of longshore bar is determined according to the method for primary deposit period paleogeographic reconstruction, main
Wanting general principle is：Deposit is filled up in a certain geologic(al) period in deposition process to basin, then primary deposit is thick
Degree and ancient landform are in mirror, i.e. the big local ancient landform of thickness of deposits is relatively low, the thin local ancient landform of thickness of deposits
It is higher, the ancient landform of longshore bar is thereby determined that, and then obtain the angle i.e. substrate of longshore bar of ancient landform and horizontal direction
Gradient α (as shown in Figure 2)；The original thickness t (as shown in Figure 2) of longshore bar is determined as follows, such as Fig. 3 institutes
Show, comprise the following steps that：
Step S301：According to the deposition distribution figure of ancient deposition period, the distribution of longshore bar is determined, and described in drawing
Company's well profile figure in longshore bar distribution；
Step S302：The spontaneous potential curve for connecting every mouthful of well in the range of longshore bar in well profile figure is divided into more
Individual subelement；
Step S303：Using the region met in the multiple subelement corresponding to the subelement of standard curve as it is specific when
The longshore bar of phase, the standard curve are the Hydrodynamic Process and petrofacies coding determination formed according to longshore bar；
Step S304：The thickness of the specific period longshore bar is calculated；
Step S305：Decompaction correction is carried out to the thickness of the specific period longshore bar, draws the specific period
The original thickness of longshore bar.
The deposition distribution figure of the ancient deposition period referred in step S301 obtains as follows：
From the data bank of oil field obtain research area geologic information, the geologic information include rock core information, log data,
Well-log information；
The type of sedimentary facies in the research area is determined according to the geologic information, by being seen to the rock core information of individual well
Examine and analyze, and analyze surveying log data, obtain studying the type of sedimentary facies of area's major developmental through analysis；
The ancient geoaraply in the research area obtained according to type of sedimentary facies and in advance, geologic climate background, the studies above area
Ancient geoaraply, geologic climate data are obtained from the document delivered, and by dotted line surface analysis, draw sedimentary facies distribution figure, its
Midpoint Line-surface analysis includes：Point analysis is carried out first, i.e., the individual well for studying area is logged well according to the geologic information of acquisition, recorded
Well is analyzed and rock core lithology, structural analysis；Then line analysis is carried out, i.e., the section between more mouthfuls of individual wells is analyzed,
Determine sedimentary facies distribution general layout；Surface analysis is finally carried out, i.e., the ancient geoaraply in binding area, geologic climate background are in studying plane
Various sedimentary facies distribution scopes are limited, and then obtain the deposition distribution figure in the research area.
Specifically, the embodiment of the present invention is by taking Dongying Depression Boxing Basin as an example, as shown in figure 4, this illustrates Dongying Depression
Pure lower sub- section research area deposition distribution figure on Boxing Basin sand four, transverse and longitudinal coordinate represent the geodetic coordinates of Boxing Basin.Sedimentary facies
Figure indicates hollow west side and develops two deltas, southern side development gravel matter beach, the east-west bank of the hollow row of center development two
Sand bar, it is respectively interior longshore bar and outer longshore bar from south to north, is enclosed among chiltern beach.It should be noted that deposition
Distribution map may be slightly different, such as research area major developmental delta, interior longshore bar, outer longshore bar, the gravel matter in Fig. 4
The type of sedimentary facies such as beach, beach, and define in figure the distribution of all kinds of sedimentary facies, what is limited in Fig. 4 in dotted line is one
The longshore bar of ancient deposition period development, as shown in figure 5, showing this longshore bar distribution schematic diagram, chooses this below
Longshore bar is furtherd investigate.
Further, selection connects well curve in this longshore bar, as between individual well F4, F143, G89, G891 in Fig. 5
Bracing wire, and the company's of drawing out well profile figure, the outer longshore bar development area Lian Jing of pure lower sub- section on Boxing Basin sand four as shown in Figure 6
Diagrammatic cross-section.The longitudinal axis represents depth.The section substantially south-north direction.24 outer longshore bars are identified altogether, i.e., are compiled in figure
Longshore bar represented by number 1-24.Longshore bar form has the characteristics of thick north in south is thin more, and extends southwards short, northwards prolongs
Elongation, instruction palaeowind direction is northerly.Wherein, even the selection principle of well profile is：At the middle part of longshore bar, select perpendicular to
Company's well profile of longshore bar trend, because longshore bar is parallel to water front development, in order that section is cut more as far as possible
The longshore bar of more developmental stages, the section perpendicular to longshore bar trend should be selected with crosscutting along bank sand using most short bracing wire
Dam, and when the mode for selecting oblique chooses even well profile, even well profile scope is not easy to analyze greatly, therefore, the embodiment of the present invention
The section perpendicular to longshore bar trend is selected as even well profile.
After company's well profile figure that the research a certain longshore bar in area is determined by step S301, next, needing to even well profile
In well logging, log data carry out detailed analysis, so as to identify quantity and the distribution of different times longshore bar exactly.
Step S302 be described in the company's well profile figure that will be determined in step S301 in the range of longshore bar every mouthful of well from
Right potential curve is divided into multiple subelements；
It should be noted that the well described in Fig. 6 in the range of longshore bar has：Individual well F4, F143, G89, to individual well F4,
F143, G89 spontaneous potential curve are divided, and it is once a unit to deviate baseline (i.e. spontaneous potential curve left avertence).
Step S303：Using the region met in the multiple subelement corresponding to the subelement of standard curve as it is specific when
The longshore bar of phase, the standard curve (such as Fig. 7) are the Hydrodynamic Process and petrofacies coding determination formed according to longshore bar
's；
Specifically, step S303 is to enter multiple subelements of the step S302 spontaneous potential curves divided with standard curve
Row comparative analysis, judge the spontaneous potential curve of subelement being consistent with the feature of standard curve, and then determine step S302
The distribution of the sand bar of the longshore bar different times development of middle determination, therefore, chooses the longshore bar of different development stage, crucial
It is the determination of standard curve, has formulated a set of petrofacies coding first for this embodiment of the present invention, petrofacies coding includes deposit
The information such as grain graininess, sedimentary structure and hydrodynamic regime, as shown in table 1,
The petrofacies of table 1 are encoded and its explained
It should be noted that longshore bar is to deposit and formed in the presence of cleaving, therefore, one completely along bank sand
Dam Sedimentary facies sequences represent the evolution cycle of its deposition from start to end, and its forming process is：
(1) wave crushes at a certain depth of water, and by offshore current with being acted on to shore current, deposit starts attached in the line that cleaves
Nearly aggregation, now the depth of water is larger, and hydrodynamic force energy is weaker；
(2) deposit continue to collect around in the line that cleaves, accretion, the depth of water gradually becomes shallower as, and wave energy is more concentrated, hydrodynamic force
Energy strengthens, and this further promotes aggregation, accretion of the deposit near the line that cleaves；
(3) sand bar form finally reaches poised state with cleaving, and has reached base level of deposition in dam crest, and wave energy is most concentrated,
Hydrodynamic force is most strong, deposit is passed by one's way not and stays, and remote bank sand dam is developed completely.
It is the evolutionary process that the depth of water gradually becomes shallower as described above, therefore, longshore bar sand body shows mostly on vertical
For inverted sequence thicker upwards.After wave action, wave energy gradually weakens, and gradually transition is that the suspension after stormy waves event is sunk
Product.
By recited above, a complete longshore bar top, bottom interface both correspond to the depth of water increased conversion suddenly
Interface is flood surface, and in sedimentary record, flood surface corresponds mainly to petrofacies transition interface.This cycle substantially reflects water
The evolutionary process gradually become shallower as deeply, therefore, longshore bar sand body show as inverted sequence thicker upwards mostly on vertical, then
Upward-fining positive sequence, illustrate longshore bar and form the water body environment that rear wave energy gradually weakens, and gradually transition is stormy waves thing
Suspension deposition after part.
According to the forming process of above-mentioned longshore bar, and combine the detailed observation and description to rock core information, it is believed that
One preferably complete longshore bar is before its formation, to after reaching full growth and arrive development termination again, from the lithofacies assemblages of bottom to top
It should be：Fmh-Fm-Fsh-Fsl-Fsw-Fsr-Fsm-Sli-Sw-Sr-Sp-Sm-Sh-Sr-Fsr-Fsw-Fm, as shown in Fig. 7
Standard curve schematic diagram, i.e., one preferable outer longshore bar vertical sequence, abscissa represent grain size of sediment, ordinate table
Show sand bar thickness, wherein,
Fmh-Fm represents the suspension deposition in Lentic environment, and Sediment property is Vlei mud, and now the depth of water is maximum, hydrodynamic(al)
Power is most weak；
Fsh-Fsl-Fsw-Fsr-Fsm represents the depth of water and starts to shoal, and now wave starts to act on lakebed, in wave
Shallow band is met, hydrodynamic force is relatively weak, and the wave fluidised form predominantly gradually strengthened acts on aleuritic texture bottom and formed, and deposit is special
Property is Vlei flour sand；
Sli-Sw-Sr-Sp-Sm-Sh represents the depth of water and further shoaled, the Main Stage now formed for longshore bar,
Wave breaking, predominantly stronger wave fluidised form act on Sandy sea bed and formed；
Sh represents the top of highest fluidised form, i.e. longshore bar, and the depth of water is most shallow；
Sr-Fsr-Fsw represents the flood surface after the completion of longshore bar is formed, and the depth of water starts to increase, and longshore bar is buried
Tibetan preserves, and Sediment property is Vlei flour sand；
The Fm phase stands depth of water further increases, and Sediment property is Vlei mud；
Until next similar cycle of sedimentation occurs.
Standard curve schematic diagram as shown in Figure 7, above-mentioned lithofacies assemblages, which are shown on nutural potential logging curve, is mostly
Bottom is infundibulate, top is changed into bell combination form.
In fact, a preferable outer longshore bar vertical sequence, sequence can be divided into three parts by boundary of longshore bar,
It is followed successively by from down to up：
Part I be longshore bar formed before deposit, predominantly Vlei mud (being followed successively by Fmh-Fm from top to bottom) and
Vlei flour sand (Fsh-Fsl-Fsw-Fsr-Fsm successively from top to bottom), represent the depth of water before longshore bar is formed and gradually become shallower as
Depositional environment；
Part II is the main body of longshore bar, and lithology from top to bottom is followed successively by Sli-Sw-Sr-Sp-Sm-Sh, is represented
The Main Stage that longshore bar is formed, the depth of water are most shallow；
Part III is the deposit after longshore bar main body is formed, and the depth of water starts to deepen, and is changed into shallow successively from top to bottom
Lake flour sand and Vlei mud.
It should be noted that in a practical situation, so complete sequence may be actually rare, it is also possible on respective turn
It has been changed that, but had no effect in the well logging spontaneous potential curve in even well profile figure, identified not according to this standard curve
Same time develops complete longshore bar, shows that 24 periods of this longshore bar develop complete sand bar distribution situation in Fig. 6, i.e.,
Longshore bar in figure represented by numbering 1-24.
Step S304：The thickness of the specific period longshore bar is calculated；
With reference to the longshore bar of the specific period identified in step S303, according to corresponding to the longshore bar of specific period
Distance between two half range points of the spontaneous potential curve (SP curves) of subelement determines the thickness of longshore bar, so as to calculate
Go out the thickness of specific period longshore bar, the longshore bar thickness of each different development stage can be drawn by this mode.
Specifically, the longshore bar of a specific period is that have certain distribution, therefore, when two mouthfuls of spacing approach
Well, may beat on same longshore bar, now, if it is considered to two mouthfuls of wells have got to different longshore bars, meeting respectively
The longshore bar quantity and thickness that must make mistake are, it is necessary to explanation, and each longshore bar side of always pulling in shore is thicker, offshore one
Side is relatively thin.It is thus necessary to determine that distribution of the longshore bar in deposition distribution figure, selection is perpendicular to edge in the range of this
Company's well profile of bank sand dam trend (longshore bar is often distributed in strip), the well profile contrast of the company of progress, analysis, is determined specific
The longshore bar in period is punched by several mouthfuls of individual wells, thus obtain exactly the quantity of specific period longshore bar with it is each specific when
The thickness of phase longshore bar.
When the longshore bar of a certain specific period is only punched by a bite individual well, (that is developed in such as Fig. 6 at serial number 5 is specific
Period longshore bar), then the distance between two half range points of the subelement of the spontaneous potential curve of the individual well are made
For the thickness of the specific period longshore bar；
When a certain specific period longshore bar by least two mouthfuls of individual wells are punched when (in such as Fig. 6 at serial number 1 develop spy
Timing phase longshore bar), then by between two half range points of the subelement of the spontaneous potential curve of the multiple individual well
Thickness of the maximum as the specific period longshore bar in distance.
The embodiment of the present invention considers that the longshore bar of specific period is distributed in a bite individual well and is also distributed across at least two mouthfuls
Different situations of individual well, and Taxonomic discussion is carried out to different situations, improve the quantity of different development stage longshore bar and right
The degree of accuracy for the thickness answered.
Step S305：Decompaction correction is carried out to the thickness of the specific period longshore bar, draws the specific period
The original thickness of longshore bar.
After the thickness that the longshore bar of each specific period has been drawn by step S304, this thickness need to press
Real correction, it follows that longshore bar thickness i.e. its original thickness gone after compacting.
First, according to the single well data obtained in advance, fitting sand shale compacting equation.
Meet following exponential relationship (Guo Qiulin etc., 1998) between known formation porosity and buried depth：
Φ=Φ0e-ch, (1)；
Wherein in formula (1)：Φ be depth h at porosity, Φ0For h=0 when earth's surface porosity, C for compacting be
Number, h is depth, wherein, C and Φ0It is all relevant with lithology.Compacting factor is asked for, it is necessary to be fitted different rocks using porosity data
The compacting equation of property.In practical application, mudstone compacting coefficient is maximum, and sandstone compaction coefficient is minimum, carbonate rock between both it
Between, depending on shale content, shale composition is at most inclined to mud stone, on the contrary then be inclined to sandstone, and coal measure strata typically borrows mud stone
Compacting factor, evaporite rock are not easy to be compacted, can be considered no compaction because its settled density is big, hole is few.
Carrying out compaction correction needs to obtain the initial porosity for the lithology for forming longshore bar and specific buried depth porosity.Grind
The longshore bar for studying carefully area is mainly made up of sandstone and the class lithology of siltstone two, with reference to the compacting equation in formula (1), according to research
Area actual measurement porosity data makes sandstone with two kinds of lithology porositys of siltstone with the relation curve of change in depth, must shake out respectively
Rock, the compacting equation of siltstone and initial porosity, and then determine the porosity of sandstone and siltstone under any depth, it is assumed that
Rock matrix constancy of volume during buried depth, it is possible to determine the original thickness of the longshore bar under certain depth.
The determination method of the above-mentioned original thickness to longshore bar is described in detail, next will be to based on bank
The ancient customs power quantitative approach of the determination method of the original thickness of sand bar illustrates.
Step S101：According to the foundation slope of the longshore bar obtained in advance and the original thickness of longshore bar, it is determined that edge
The bank sand Ba Badingchu depth of water of cleaving；
Firstly the need of explanation, the process (as shown in Figure 2) that primarily forms of longshore bar includes：Wind acts on lake meeting
Produce wave, wave can crush in the communication process of onshore because the depth of water shoals, the broken longshore bar that causes of wave
Formed, i.e. deposit under the disturbance cleaved, deposit will collect around from the both direction of onshore and offshore to the line that cleaves,
Deposition forms longshore bar (as shown in B in Fig. 2) (as shown in A in Fig. 2), and final longshore bar form reaches with cleaving
Poised state (as shown in C in Fig. 2).It follows that the formation of longshore bar is closely related with cleaving, the position cleaved and size
Position and the size of longshore bar are directly affected, as knowable to the geometrical relationship of each parameter in Fig. 2 C,
In above-mentioned formula, t is the original thickness (m) of longshore bar, dbIt is depth of water depth of water i.e. at longshore bar dam crest of cleaving
(m), dtIt is the depth of water (m) of longshore bar onshore side groove, α is the foundation slope of longshore bar, and θ is longshore bar onshore one
The gradient of side.
Further, it can be seen from Gallagher et al. (1998) and Thornton et al. (1996) document,
Tan θ ideal value is 0.63, and combines Otto (1912), Keulegan (1948) and Evans (1940) et al. achievement in research
Understand, the depth of water d of longshore bar onshore side groovetWith the depth of water depth of water d i.e. at longshore bar dam crest that cleavesbRatio be approximately equal to
1.6, thus, formula (2) is reduced to：
T=(0.6+0.95tan α) db, (3)
According to the foundation slope α of the longshore bar of above-mentioned determination and the original thickness t of longshore bar, and combine formula (3)
The depth of water depth of water d i.e. at longshore bar dam crest that cleaves can be calculatedb。
Step S102 refers to the depth of water d that cleaves determined using step S101b, with reference to the good solid-line curve in field is closed, it is determined that the ripple that cleaves
High Hb。
Specifically, the experience curve that Goda (1970) was once depicted as according to the testing data of several beach gradients closes Tian Liang
Solid-line curve (as shown in Figure 8), can be by the depth of water d that cleavesbIt is determined that the wave height H that cleavesb。
Before the good solid-line curve in field is closed in application, the terrain slope and ancient customs journey in research area should be first obtained.Below with Dongying
Exemplified by depression, briefly introduce according to the water wave wave height H that cleavesbDetailed process, because paleogeographic reconstruction result shows its substrate slope
Therefore degree, should select the curve corresponding to 1/50 close to 1/50 in the good solid-line curve Fig. 8 in field is closed, next need to be according to abscissa
db/L0To determine Hb/db, wherein L0For deep-water weave wavelength, it can be by closing the formula in the good solid-line curve Fig. 8 in field shown in the upper right corner
L0=1.56T2, wherein T is wave period (s).It is relevant with ancient customs journey for limited wind area, wave period T domains of walker.Therefore
It needs to be determined that ancient customs journey, ancient customs journey determines as follows：
Using the dam crest of longshore bar as starting point, using ancient lake water front as terminal, using the straight line where ancient customs direction as center line,
In the range of center line ± 45 °, it is upwind with 6 ° for interval, draw a plurality of line segment；
Projected length value of the every radial line segment on ancient customs direction is measured respectively；
Using the arithmetic mean of instantaneous value of the projected length value of a plurality of line segment as ancient customs journey.
It should be noted that ancient customs journey refers to that ancient customs blows over the distance come, therefore should come in target location against wind
Direction draw a plurality of line segment, and then determine ancient customs journey.
Further, ancient customs direction is determined as follows：
According to the vertical line of the major axis of the longshore bar, ancient customs direction location is determined, you can to determine ancient customs side
To the vertical lines run parallel with longshore bar major axis, but the direction in ancient customs direction can not be judged；
Further according to the thickness and development length on the ancient customs direction of the longshore bar, ancient customs direction direction is determined；
Specifically, the thickness and development length of longshore bar and ancient customs direction is towards relation：Leeward side (onshore one
Side) thick and extension is short, and side (offshore side) is then thin windward and extends length, it is possible thereby to determine ancient customs direction direction.
According to ancient customs direction location and ancient customs direction direction, ancient customs direction is determined.
For example, in Dongying Depression area, as shown in figure 9, with the individual well F143 in the longshore bar of dotted line limit in Fig. 4
Exemplified by the longshore bar for locating the specific period of development, during the centre one in 15 emitting shape dashed line segments in Fig. 9 is described
Line, this projected length of 15 emitting shape dashed line segments on center line, then pair 15 emitting shape void determined are then measured respectively
The projected length of line line segment asks for arithmetic mean of instantaneous value i.e. ancient customs journey, for example, after engineer's scale corrects, 15 hairs shown in Fig. 9
Penetrate projected length of the shape dashed line segment on center line be respectively 33382m, 13858m, 11935m, 10830m, 10090m, 9729m,
9243m, 8221m, 33857m, 34104m, 30282m, 34485m, 51161m, 47913m, 54289m, arithmetic is carried out to them and put down
, thereby determined that at individual well F143 develop specific period longshore bar corresponding to ancient customs journey be 26225m, other when
The ancient customs journey corresponding to longshore bar developed at phase, other well locations obtains also by the above method.
It should be noted that limited wind area condition of the U.S. Coast ERC (CERC) in the document of 1984
The deep water wave height of lower different fetchs and wave period graph of a relation (as shown in Figure 10), provide in figure ancient customs journey be respectively 10km,
When 20km, 30km, 50km, 70km, 100km, the relation of profundal zone wave height and wave period, due to the ancient customs arrived of above-mentioned calculating
Journey is 26225m, therefore it is scatterplot corresponding to 30km to select ancient customs journey.
The wave period that 30km ancient customs journey is formed as shown in Figure 10 about fluctuates in 5s, therefore can obtain T ≈
5, try to achieve L0=39.So, in fig. 8, can be according to abscissa db/L0To determine Hb/db, dbIt is to be determined in S101 steps,
Thus H is tried to achieveb。
Step S103：According to the wave height H that cleavesbWith known wave statistics feature, profundal zone significant wave height H is determinedS；
Specifically, it can be seen from the statistical nature of wave, theoretical maximum wave height HmaxIt is profundal zone significant wave height HSTwice
That is Hmax≈2HS, and during wave is propagated in onshore, wave height gradually increases, and reaches maximum in position wave height of cleaving, afterwards
Tapered into the consumption of wave energy, therefore the wave height H that cleaves determined according to the good solid-line curve in field is closedb, can be approximately the period ripple
The maximum wave height of wave is Hb≈Hmax。
To sum up, wave height of cleaving HbIt is approximately equal to profundal zone significant wave height HS2 times, i.e. Hb≈2HS
Therefore, the wave height H that cleaves obtained in step S102 is utilizedb, it may be determined that profundal zone significant wave height HS。
Step S104：According to ancient customs journey and profundal zone significant wave height, with reference to the wave forecasting formula of limited wind area water body, meter
Calculation obtains coefficient of wind pres；
According to the profundal zone significant wave height H determined in the ancient customs journey F and step S103 obtained in above-mentioned steps S102S, knot
Close a limited wind area water body relatively simple, applied to simple wave condition condition of U.S. Coast ERC (CERC)
Wave forecasting formula, specific formula is：
Wherein, F is ancient customs journey (m), HsFor profundal zone significant wave height (m), UAFor coefficient of wind pres (m/s).
By formula (4), coefficient of wind pres U can be obtainedA。
Step S105：According to coefficient of wind pres and known coefficient of wind pres and wind speed relational expression, ancient customs power wind speed is determined；
Further, according to U.S. Coast ERC (CERC) in the document of 1984, coefficient of wind pres UAWith
The relational expression of wind velocity U is：
UA=0.71U1.23, (5)
Wherein, UAFor coefficient of wind pres (m/s), U is the wind speed (m/s) at 10m above the water surface.
It should be noted that generally, wind speed refers to the wind speed at 10m on ground in meteorology, likewise, using water
Wind speed above face at 10m represents ancient customs wind speed.
Method provided in an embodiment of the present invention is the foundation slope and longshore bar according to the longshore bar obtained in advance
Original thickness, determine the depth of water of cleaving at longshore bar dam crest；According to the depth of water and the known conjunction good solid-line curve in field of cleaving, it is determined that broken
Unrestrained wave height；According to wave height and the known wave statistics feature of cleaving, profundal zone significant wave height is determined；According to ancient customs journey and profundal zone
Significant wave height, with reference to the wave forecasting formula of limited wind area water body, coefficient of wind pres is calculated；According to coefficient of wind pres and known
Coefficient of wind pres and wind speed relational expression, determine ancient customs power wind speed, accordingly, it is capable to access more accurate ancient customs power.
The embodiment of the present invention additionally provides a kind of ancient customs force measuring device based on longshore bar thickness quantitative approach, such as schemes
Shown in 11, the primary structure of the device includes：
The depth of water of cleaving determining module 1101, for according to the foundation slope of longshore bar and longshore bar obtained in advance
Original thickness, determine the depth of water of cleaving at the longshore bar dam crest；
Wave height of cleaving determining module 1102, for the depth of water and the known conjunction good solid-line curve in field of being cleaved according to, it is determined that broken
Unrestrained wave height；
Significant wave height determining module 1103, for wave height and the known wave statistics feature of being cleaved according to, it is determined that deep
Pool significant wave height；
Coefficient of wind pres determining module 1104, for according to ancient customs journey and the profundal zone significant wave height, with reference to limited wind area
The wave forecasting formula of water body, is calculated coefficient of wind pres；
Ancient customs power wind speed determining module 1105, for according to the coefficient of wind pres and known coefficient of wind pres and wind speed relation
Formula, determine ancient customs power wind speed.
In said apparatus, the depth of water determining module 1101 of cleaving includes：
Acquiring unit, for obtaining the foundation slope of longshore bar and the original thickness of longshore bar；
Computing unit, for according to equation below, calculating the depth of water of cleaving at the longshore bar dam crest,
Wherein, t is the original thickness (m) of longshore bar, dbIt is the cleave depth of water depth of water (m), d i.e. at longshore bar dam cresttIt is
The depth of water (m) of longshore bar onshore side groove, α are the foundation slopes of longshore bar, and θ is the slope of longshore bar onshore side
Degree.
Device provided in an embodiment of the present invention is by depth of water determining module 1101 of cleaving, for according to the bank obtained in advance
The foundation slope of sand bar and the original thickness of longshore bar, determine the depth of water of cleaving at longshore bar dam crest；Wave height of cleaving determines
Module 1102, according to the depth of water and the known conjunction good solid-line curve in field of cleaving, it is determined that wave height of cleaving；Significant wave height determining module 1103,
According to wave height and the known wave statistics feature of cleaving, profundal zone significant wave height is determined；Coefficient of wind pres determining module 1104, according to
Ancient customs journey and profundal zone significant wave height, with reference to the wave forecasting formula of limited wind area water bodyCalculate
Obtain coefficient of wind pres；Ancient customs power wind speed determining module 1105, according to coefficient of wind pres and known coefficient of wind pres and wind speed relational expression
UA=0.71U1.23, ancient customs power wind speed is determined, accordingly, it is capable to access more accurate ancient customs power.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
Specific work process, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
Finally it should be noted that：Embodiment described above, it is only the embodiment of the present invention, to illustrate the present invention
Technical scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those within the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical scheme of the embodiment of the present invention.The protection in the present invention should all be covered
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (8)
1. the ancient customs force measuring method based on longshore bar thickness quantitative approach, it is characterised in that including：
The foundation slope of longshore bar and the original thickness of longshore bar are obtained, and according to formula
Calculate the depth of water of cleaving at the longshore bar dam crest；
According to the cleave depth of water and the known conjunction good solid-line curve in field, it is determined that wave height of cleaving；
According to cleave wave height and the known wave statistics feature, profundal zone significant wave height is determined；
According to ancient customs journey and the profundal zone significant wave height, with reference to the wave forecasting formula of limited wind area water body, wind is calculated
Press coefficient；
According to the coefficient of wind pres and the relational expression of known coefficient of wind pres and wind speed, ancient customs power wind speed is determined；
Wherein, t is the original thickness (m) of longshore bar, dbIt is the cleave depth of water depth of water (m), d i.e. at longshore bar dam cresttIt is littoral
The depth of water (m) of sand bar onshore side groove, α are the foundation slopes of longshore bar, and θ is the gradient of longshore bar onshore side.
2. the ancient customs force measuring method according to claim 1 based on longshore bar thickness quantitative approach, it is characterised in that
The original thickness of the longshore bar obtains as follows：
According to the deposition distribution figure of ancient deposition period, the distribution of longshore bar is determined, and draws the longshore bar distribution
In the range of company's well profile figure；
By the spontaneous potential curve of every mouthful of well is divided into multiple subelements in the range of longshore bar in the even well profile figure；
Longshore bar of the region corresponding to the subelement of standard curve as the specific period will be met in the multiple subelement,
The standard curve is the Hydrodynamic Process and petrofacies coding determination formed according to longshore bar；
The thickness of the specific period longshore bar is calculated；
Decompaction correction is carried out to the thickness of the specific period longshore bar, draws the original of the specific period longshore bar
Thickness.
3. the ancient customs force measuring method according to claim 1 based on longshore bar thickness quantitative approach, it is characterised in that
The wave statistics feature includes：
The wave height of cleaving is 2 times of the profundal zone significant wave height.
4. the ancient customs force measuring method according to claim 1 based on longshore bar thickness quantitative approach, it is characterised in that
The ancient customs journey determines as follows：
Using the dam crest of the longshore bar as starting point, using ancient lake water front as terminal, using the straight line where ancient customs direction as center line,
In the range of center line ± 45 °, it is upwind with 6 ° for interval, draw a plurality of line segment；
Projected length value of the every radial line segment on ancient customs direction is measured respectively；
Using the arithmetic mean of instantaneous value of the projected length value of a plurality of line segment as ancient customs journey.
5. the ancient customs force measuring method according to claim 4 based on longshore bar thickness quantitative approach, it is characterised in that
The ancient customs direction is determined as follows：
According to the vertical line of the major axis of the longshore bar, ancient customs direction location is determined；
According to the thickness and development length on the ancient customs direction of the longshore bar, ancient customs direction direction is determined；
According to ancient customs direction location and ancient customs direction direction, ancient customs direction is determined.
6. the ancient customs force measuring method according to claim 1 based on longshore bar thickness quantitative approach, it is characterised in that
The formula：In, tan θ=0.63, dt≈1.6db,
Wherein, t is the original thickness (m) of longshore bar, dbIt is the cleave depth of water depth of water (m), d i.e. at longshore bar dam cresttIt is littoral
The depth of water (m) of sand bar onshore side groove, α are the foundation slopes of longshore bar, and θ is the gradient of longshore bar onshore side.
7. the ancient customs force measuring method according to claim 1 based on longshore bar thickness quantitative approach, it is characterised in that
The wave forecasting formula of the limited wind area water body includes：
<mrow>
<msub>
<mi>U</mi>
<mi>A</mi>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>H</mi>
<mi>s</mi>
</msub>
<mrow>
<mo>(</mo>
<mn>5.112</mn>
<mo>&times;</mo>
<msup>
<mn>10</mn>
<mrow>
<mo>-</mo>
<mn>4</mn>
</mrow>
</msup>
<mo>)</mo>
<msup>
<mi>F</mi>
<mrow>
<mn>1</mn>
<mo>/</mo>
<mn>2</mn>
</mrow>
</msup>
</mrow>
</mfrac>
<mo>,</mo>
</mrow>
Wherein, F is ancient customs journey (m), HsFor profundal zone significant wave height (m), UAFor coefficient of wind pres.
8. the ancient customs force measuring device based on longshore bar thickness quantitative approach, it is characterised in that including：
The depth of water of cleaving determining module, it is specifically included：Acquiring unit and computing unit, the acquiring unit are used to obtain along bank sand
The foundation slope on dam and the original thickness of longshore bar, the computing unit are used for according to formula
The depth of water of cleaving at the longshore bar dam crest is calculated, wherein, t is the original thickness (m) of longshore bar, dbIt is to cleave the depth of water i.e.
The depth of water (m) at longshore bar dam crest, dtIt is the depth of water (m) of longshore bar onshore side groove, α is the substrate slope of longshore bar
Degree, θ is the gradient of longshore bar onshore side；
Wave height of cleaving determining module, for the depth of water and the known conjunction good solid-line curve in field of being cleaved according to, it is determined that wave height of cleaving；
Significant wave height determining module, for wave height and the known wave statistics feature of being cleaved according to, determine that profundal zone is effective
Wave height；
Coefficient of wind pres determining module, for according to ancient customs journey and the profundal zone significant wave height, with reference to the ripple of limited wind area water body
Unrestrained predictor formula, is calculated coefficient of wind pres；
Ancient customs power wind speed determining module, for according to the coefficient of wind pres and known coefficient of wind pres and wind speed relational expression, it is determined that
Ancient customs power wind speed.
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| CN107131858B (en) * | 2017-05-09 | 2019-03-15 | 中国地质大学（北京） | A method of calculating Lake Bank broken sea dam deposition thickness |
| CN107490810B (en) | 2017-08-17 | 2019-07-19 | 中国地质大学（北京） | Based on wind field, material resource, the reservoir sand body prediction method and apparatus of basin Systems |
| CN108121888B (en) * | 2018-02-06 | 2021-06-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Analysis method for cross section balance gradient of beach intertidal zone |
| CN112394400B (en) * | 2019-08-16 | 2023-10-31 | 中国石油天然气股份有限公司 | Quantitative prediction method, equipment and system for ancient shoreline |
| CN112697787A (en) * | 2020-12-08 | 2021-04-23 | 新疆大学 | Method for determining ancient wind direction through distribution rule of oolitic beach on carbonate rock platform |
| CN113267494B (en) * | 2021-02-04 | 2024-03-26 | 新疆大学 | Method for quantitatively recovering palaeolian direction of carbonate bench |
| CN113065236B (en) * | 2021-03-19 | 2022-03-11 | 吉林大学 | Analysis method for continuous sediment paleoclimate substitution index tashengmycin gyrus change |
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