CN106383369A - Slope belt ancient slope calculation method - Google Patents
Slope belt ancient slope calculation method Download PDFInfo
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- CN106383369A CN106383369A CN201610917789.6A CN201610917789A CN106383369A CN 106383369 A CN106383369 A CN 106383369A CN 201610917789 A CN201610917789 A CN 201610917789A CN 106383369 A CN106383369 A CN 106383369A
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- 238000004364 calculation method Methods 0.000 title claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000005259 measurement Methods 0.000 claims abstract description 30
- 239000011435 rock Substances 0.000 claims description 41
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 21
- 238000000205 computational method Methods 0.000 claims description 18
- 230000008021 deposition Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 abstract description 10
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 41
- 239000008187 granular material Substances 0.000 description 18
- 239000000243 solution Substances 0.000 description 14
- 230000008859 change Effects 0.000 description 11
- 230000001186 cumulative effect Effects 0.000 description 11
- 239000012530 fluid Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000000058 Anaplasia Diseases 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
- G01V9/007—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by detecting gases or particles representative of underground layers at or near the surface
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N2015/0277—Average size only
Abstract
The present invention provides a slope belt ancient slope calculation method which comprises a step of obtaining the particle size average value of sediment particles, a step of calculating the depth of an ancient waterway according to a measured thickness of an ancient waterway sediment residual, and a step of calculating the slope belt ancient slope according to the particle size average value and the ancient waterway depth. Since the glutenite is buried under water and is not eroded, the inaccurate measurement caused by the easy erosion of a part of a sediment above the water is avoided, through an improving the mode measuring the particle size average value D50 of the sediment particles, a mode of instrument measurement is used, and thus the accuracy of the data obtained by measurement is improved.
Description
Technical field
The present invention relates to geological exploration field, especially relate to a kind of slope belt Gu gradient computational methods.
Background technology
Edge (the loke shore, seashore) position in ancient lakes or sea, due to there being the injection in river, has substantial amounts of silt
Carrying so far, and deposits.Through the compacting of burying of millions of years, there is diagenesis, form one in the silt of ancient times deposition
Plant the internal reservoir rock developed and have a lot of holes.This kind of rock can store abundant petroleum resources, and on ancient lake side
Edge extensive development, becomes the important oil reservoirs of a class of east China petroleum exploration domain.But, the growth of this rocks can be subject to
Impact to the change of ancient lake relative water depth：When water depth ratio amplitude is larger, extend farther out in the lake of covalency, this rocks
The growth thickness of loke shore thicker, develop area wider；When amplitude of variation hour, this rocks is developed thickness of thin, is developed area
Less.In petroleum exploration domain, need the area by determining the growth of such reservoir rock and thickness, and then estimate oil gas money
Source reserves.Accordingly, it would be desirable to quantitative Analysis are carried out to the relative water depth amplitude of variation of ancient lakes specific period, storage is determined with this
The developmental state of layer rock.Meanwhile, in academic research field, with regard to recover ancient landform, paleao-water depth problem be always geology,
The focus of research, difficult point in the fields such as sedimentology, the method is for the research improving geology, sedimentological paleao-water depth recovers
There is positive effect.
Once foreign scholar was had to propose using the ancient gradient of ancient seashore slope belt and prolonging of seashore channel deposit waterborne a few years ago
Stretch distance to calculate the amplitude of variation of relative water depth.The method carries out the meter of the slope belt Gu gradient of waterfront margin slope band first
Calculate, further need exist for on-the-spot investigation according to field and measure the distance that river drift waterborne extends forward in slope belt,
The namely horizontal-extending distance of deposit, carries out trigonometric function calculating using this two parameters, finally calculates relative water depth and becomes
Change amplitude.
But in prior art, calculate relative water depth amplitude of variation when, mainly using be prolonging of river drift waterborne
Stretch distance come the horizontal-extending distance of deposit to calculate.Easily degraded due to the above water of deposit, preserved imperfect, led
River course waterborne extended distance is caused to be difficult accurately to measure.The ancient stream channel relative water depth amplitude of variation that this also has led to calculating is not
Accurately.
Content of the invention
The present invention is Application No. CN201410218974.7, and patent name is " the calculating side of relative water depth amplitude of variation
The divisional application of method ".
It is an object of the invention to provide a kind of slope belt Gu gradient computational methods, to solve skill present in prior art
Art problem.
The computational methods providing relative water depth amplitude of variation in an embodiment of the present invention include：According to multiple places
Glutenite percentage composition value calculates the horizontal-extending distance of deposit；
Obtain the slope belt Gu gradient apart from same position horizontal-extending with described deposit；
Relative water depth amplitude of variation is calculated according to the described slope belt Gu gradient and the horizontal-extending distance of described deposit.
Preferably, the described glutenite percentage composition value according to multiple places calculates the horizontal-extending distance of deposit and includes：
Glutenite percentage composition value according to the first period multiple place draws the first glutenite percentage composition isogram；
It is equivalent that glutenite percentage composition value according to the second period the plurality of place draws the second glutenite percentage composition
Line chart；
According to described first glutenite percentage composition isogram and described second glutenite percentage composition isogram meter
Calculate the horizontal-extending distance of deposit.
Preferably, also include：The glutenite cumulative thickness of measurement specified location and the stratum cumulative thickness of this position；
Ratio according to described glutenite cumulative thickness and described stratum cumulative thickness obtains described in described specified location
Glutenite percentage composition value.
Preferably, also include：
Obtain the mean particle size of deposited particles；
Paleochannel depth is calculated according to the ancient times water channel deposit residual thickness measuring；
According to described mean particle size and the paleochannel depth calculation slope belt Gu gradient.
Preferably, also include before the described mean particle size obtaining deposited particles：
Obtain multiple deposited particles；
Measure the particle diameter of each deposited particles using mode measured directly；
If the particle diameter of deposited particles is less than default limit value, the grain to this deposited particles by the way of apparatus measures
Footpath measures, and obtains direct measurement value as grain diameter measurement value；
If the particle diameter of deposited particles is not less than default limit value, using the direct measurement obtaining value as grain diameter measurement
Value；
Mean particle size is calculated according to the described grain diameter measurement value of each deposited particles.
Preferably, described instrument includes：Laser particle analyzer and optical microscope.
Preferably, also include：
Measure the thickness of coarse grain of many phases deposition；
The meansigma methodss calculating coarse grain deposition described in many phases are as ancient times water channel deposit residual thickness.
Preferably, also include：The slope belt Gu gradient is calculated according to equation below：
S=0.141 × D50×d-1
Wherein, S is the slope belt Gu gradient, D50For the mean particle size of deposited particles, d is paleochannel depth.
Preferably, relative water depth amplitude of variation is calculated according to equation below；
H=X × S
Wherein H is relative water depth amplitude of variation, and X is the horizontal-extending distance of deposit, and S is the slope belt Gu gradient.
Preferably, by the way of apparatus measures, the particle diameter of this deposited particles is measured including：
Pulverize the rock sample with deposited particles, the size making described deposited particles is 0.5-1.5mm；
Rock sample after pulverizing is placed in the H that concentration is 10%-20%2O2In solution, and during default one section of heating in water bath
Between；
Taking-up is placed in H2O2Rock sample in solution, and this rock sample is placed in the hydrochloric acid solution that concentration is 5%-15%, until
Rock sample bubble-free produces；
Take out the rock sample being placed in hydrochloric acid solution, and remove the H on rock sample2O2Solution and hydrochloric acid solution；
Grind described rock sample, to obtain independent deposited particles；
Measure the particle diameter of deposited particles using laser particle analyzer.
The computational methods of relative water depth amplitude of variation provided in an embodiment of the present invention, with of the prior art using river waterborne
The extended distance of road deposit come the horizontal-extending distance of deposit to calculate, easily degraded due to the above water of deposit,
Preserve imperfect, lead to river course waterborne extended distance to be difficult accurately to measure, and then lead to relative water depth amplitude of variation to be inaccurate
Compare, it to calculate the horizontal-extending distance of deposit by using the glutenite percentage composition in multiple places, due to glutenite
It is to bury underwater, will not suffer erosion, so just avoid and easily degraded due to deposit above water, and cause
Measurement inaccurate so that the reliability calculating the horizontal-extending distance of deposit is higher, and then make by slope belt Gu the gradient and
The accuracy of the relative water depth amplitude of variation that the horizontal-extending distance of deposit calculates is higher.
Brief description
Fig. 1 shows the basic flow sheet of the computational methods of relative water depth amplitude of variation of the embodiment of the present invention；
Fig. 2 show the deposit of the relative water depth amplitude of variation of the embodiment of the present invention horizontal-extending apart from calculation process
Figure；
Fig. 3 shows that two period of the morning and evening glutenite percentage composition of the relative water depth amplitude of variation of the embodiment of the present invention is equivalent
The comparison diagram of line chart；
Fig. 4 shows the schematic diagram of the relative water depth amplitude of variation computational methods of the embodiment of the present invention.
Specific embodiment
Below by specific embodiment and combine accompanying drawing the present invention is described in further detail.
The embodiment of the present invention 1 provides the computational methods of relative water depth amplitude of variation, as shown in figure 1, comprising the steps：
S101, the glutenite percentage composition value according to multiple places calculates the horizontal-extending distance of deposit；
S102, obtains the slope belt Gu gradient apart from same position horizontal-extending with deposit；
S103, calculates relative water depth amplitude of variation according to the slope belt Gu gradient and the horizontal-extending distance of deposit.
The computational methods of relative water depth amplitude of variation mainly use the horizontal-extending distance of deposit and the slope belt Gu gradient
Come to calculate, the horizontal-extending distance of certain deposit and the slope belt Gu gradient refer to the distance of same position and the ancient gradient, phase
Water depth ratio amplitude is referred to the difference of the depth of water in two periods sooner or later.
In prior art, the deposit water that calculated according to the deposit extended distance waterborne that the on-the-spot investigation in field draws
Flat extended distance is inaccurate, and its reason is deposit waterborne, with the impact of current, migration over time, and can make to sink
The above water of long-pending thing is degraded, and then leads to the horizontal-extending distance of the deposit calculating to be inaccurate, in view of this,
In step S101, employ and calculate the horizontal-extending distance of deposit using glutenite percentage composition value, to substitute by waterborne
Deposit extended distance is calculating the horizontal-extending distance of deposit.In order to accurately calculate the horizontal-extending distance of deposit, need
First measure the glutenite percentage composition of locality, calculate the horizontal-extending distance of deposit according to glutenite percentage composition.Wherein,
In order to accurately measure the percentage composition of glutenite, need to play many mouthfuls of prospect pits in position to be measured, certainly, the position of prospect pit is got over
Intensive, the data of the glutenite percentage composition being obtained is also more, distribution average it is also possible to make calculated glutenite
Percentage composition is more accurate.After recording glutenite percentage composition, can be according to the glutenite percentage composition of the multiple positions recording
Draw glutenite percentage composition (glutenite thickness/formation thickness) isogram in two periods sooner or later, more intuitively to obtain
To the horizontal-extending distance of deposit.
Step S102, also needs to obtain the slope belt Gu gradient, wherein, slope belt to calculate relative water depth amplitude of variation
The ancient gradient can calculate according to the paleochannel depth of this position and average median grain diameter, has been described above its meter in prior art
Calculation process, will not be described here.
Step S104, finally, calculates relative water depth change width according to the slope belt Gu gradient and the horizontal-extending distance of deposit
Degree.The slope belt Gu gradient, the horizontal-extending distance of deposit and relative water depth amplitude of variation constitute a right angled triangle, according to
The calculation of right angle trigonometry function can calculate to obtain relative water depth amplitude of variation.
The computational methods of relative water depth amplitude of variation provided in an embodiment of the present invention, by using the glutenite in multiple places
Percentage composition calculating the horizontal-extending distance of underwater sediment(s), wherein the horizontal-extending distance of underwater sediment(s) refer to sooner or later two when
The difference of the deposit horizontal range of phase.Because glutenite is to bury underwater, will not suffer erosion, so calculate, just keep away
Exempt from easily to be degraded due to deposit above water, and the measurement that causes is inaccurate so as to calculate deposit horizontal-extending
The reliability of distance is higher, and then so that the relative water depth calculating by the slope belt Gu gradient and the horizontal-extending distance of deposit is become
The accuracy of change amplitude is higher.
The embodiment of the present invention 2 on the basis of embodiment 1, the meter of relative water depth amplitude of variation of further description
The details of calculation method.
For the ease of calculating the horizontal-extending distance of deposit, step S101 can be divided into following steps, as shown in Figure 2：
S201, it is equivalent that the glutenite percentage composition value according to the first period multiple place draws the first glutenite percentage composition
Line chart；
S202, the glutenite percentage composition value according to the second period the plurality of place draws the second glutenite percentage composition
Isogram；
S203, according to described first glutenite percentage composition isogram and described second glutenite percentage composition contour
Figure calculates the horizontal-extending distance of deposit.
It should be noted that the glutenite percentage composition value of different times is to be distinguished by the fineness of glutenite
, then by detailed contrast and calculate obtain different times each place glutenite percentage composition, finally further according to
The glutenite percentage composition in each place of different times is depicted as glutenite percentage composition isogram.Wherein, the first period
Refer to two periods of morning and evening in relative water depth amplitude of variation with the second period.Specifically, glutenite percentage composition value is specific bit
The ratio of the stratum cumulative thickness of the glutenite cumulative thickness put and this position, that is, the glutenite cumulative thickness of every mouthful of well and should
The ratio of the stratum cumulative thickness of position, certainly, in the contemporaneity that glutenite cumulative thickness and stratum cumulative thickness refer to,
Within period morning and evening two needing to calculate relative water depth amplitude of variation.The glutenite being drawn by the well of diverse location
Percentage composition value is depicted as glutenite percentage composition isogram, then the glutenite percentage composition by two periods of contrast morning and evening
Isogram can obtain the horizontal-extending distance of deposit.
Glutenite percentage composition isogram has reacted to be calculated in the territorial scope of relative water depth amplitude of variation and has developed
The content of glutenite number, and the deposit at lake edge or seashore edge is mainly based on glutenite, therefore, by estimating
Calculate the change of glutenite contour, then can reflect the horizontal-extending distance of lake edge underwater sediment(s).The volume of isogram
System, needs first to collect the rock data that survey region prospect pit is drilled through, identifies the rock category in interval of interest, judge that it is
No for glutenite.Then count the thickness of the cumulative thickness of glutenite in every mouthful of prospect pit layer purpose section and this interval of interest respectively
Degree, and obtain its ratio, this ratio is the glutenite percentage composition value of every mouthful of prospect pit.Subsequently sit according to the well location of different prospect pits
Be marked with and this prospect pit glutenite percentage composition value, obtain isogram using graphics software.
The thickness situation of rock grain size come to distinguish and two periods of calculating and plotting good morning and evening glutenite percentage composition etc.
The comparison diagram of value line chart, as shown in figure 3, wherein, the code name of single, shore and the difference prospect pit of digitized representation behind, and multiple point
Location designation, the edge of black region represents the scope that edge underwater sediment(s) in lake extends, and left side a figure represents water body relatively
The scope that deep period deposit is developed, right side b figure represents the shallower scope being of water body, and dotted line the scope of b in figure will extend to a
Figure is contrasted, and two solid lines of a in figure represent the deposit scope of the high and low different times of the depth of water respectively, measure in figure
Underwater sediment(s) on map horizontal-extending distance change value, in conjunction with scale during drawing so that it may conversion is deposited
Thing horizontal-extending apart from X.
The slope belt Gu gradient can calculate as follows：
Obtain the mean particle size of deposited particles；
Paleochannel depth is calculated according to the ancient times water channel deposit residual thickness measuring；
According to described mean particle size and the paleochannel depth calculation slope belt Gu gradient.
Its computing formula is S=0.141 × D50×d-1；
Wherein, S is the slope belt Gu gradient, D50For the mean particle size of deposited particles, d is paleochannel depth.
The calculating of the slope belt Gu gradient first has to use St.Venant formula (St.Venantequation)：
Equation that describes the flowing law of fluid in water channel.Wherein, u is x direction (downbeam) speed, and v is y direction
(perpendicular flow direction) speed, t is the time, and σ is physical features height above sea level (topographicelevation), and d is paleochannel depth, τ
For shear stress (i.e. the shear stress of granule and fluid contact interface, effect at the surface of the particles, τ hereinafter0、τ*It is similarly granule
With the shear stress of fluid contact interface, effect is at the surface of the particles).
The equation is simplified：Assume that water channel depth is constant, thenAgain another speed keeps constant, neither anaplasia at any time
Change, also not with change in location, thus can get Then (1) formula is changed into
Simultaneously asWherein, S is the slope belt Gu gradient, so
τ=ρ gdS, (2)；
(2) formula indicates and is handled upside down the mechanical balance state that granule reaches under steady state of motion, that is, in water channel water body
Gravity along slope direction component reach with granule and the shear stress (internal friction) of fluid contact interface equal.Because mechanics is put down
Weighing apparatus is so that granule stop motion realize deposition.If it is possible to estimate the size of shear stress, then can calculate
Go out the gradient.Parker (1978) proposes the initial shear stress (critical shear stress) of the shear stress τ under poised state and granule carrying
There is such relation：
τ=(1+ ε) τ0, (3)
Wherein τ0For the initial shear stress of granule carrying, ε is theoretical value 0.2.Parker thinks, what granule motion was subject to cuts
When meeting the relation shown in (3) formula, τ-value has then reached its maximum to stress (internal friction), in this case, water channel itself meeting
Set up a kind of mechanism of dynamic equilibrium so that granule gradually forms deposition.So, can be asked by initial shear stress using (3) formula
Obtain the shear stress under poised state.
Initially the estimation of (critical) shear stress can introduce the concept of critical Shields shear stress.Croninetal.
(2007) point out that critical Shields shear stress is defined as the initial shear stress of granule motion and the ratio of particle mean size intermediate value,
I.e.
Wherein, τ*For critical Shields shear stress, τ0For granule motion initial shear stress, ρsFor grain density (glutenite
Density range 2.3～2.7), ρ is fluid density (water is 1), D50For particle mean size intermediate value (mean particle size).Face when τ * reaches
During dividing value, then there is transportation in granule.With regard to τ*Value, herein choose experimentation empirical value 0.062.
Simultaneous formula (2), (3), (4), can obtain
By ρs、ρ、ε、τ*Substitute into (5) respectively, be calculated gradient computing formula
S=0.141 × D50×d-1, (6)；
Therefore, as long as measuring mean diameter meansigma methodss D in research area50With paleochannel depth d, then the slope belt Gu gradient
S can draw.
In order to more accurately measure the mean particle size D of deposited particles50, it is possible to use measuring instrument replaces traditional direct
Metering system (artificial ruler measurement).Simultaneously take account of the time-consuming long of apparatus measures mode, and cost is higher than artificial straight
Connect metering system, therefore, the mean particle size measuring and calculating mode of deposited particles is as follows：
Obtain multiple deposited particles；
Measure the particle diameter of each deposited particles using mode measured directly；
If the particle diameter of deposited particles is less than default limit value, the grain to this deposited particles by the way of apparatus measures
Footpath measures, and obtains direct measurement value as grain diameter measurement value；
If the particle diameter of deposited particles is not less than default limit value, using the direct measurement obtaining value as grain diameter measurement
Value；
Mean particle size is calculated according to the described grain diameter measurement value of each deposited particles.
By different size of deposited particles are selected different metering systems, improve the grain of the deposited particles measuring
The degree of accuracy in footpath, and then make the relative water depth amplitude of variation calculating by this value more accurate.It also avoid making simply simultaneously
The prolongation of the time of measuring being led to apparatus measures and the increase of cost, turn avoid and rely solely on Instrumental Analysis and lead to coarse grain
The difficulty that granule cannot measure.Preferably, default limit value is 10mm, so can be with will be easily accurate by direct measurement mode
The deposited particles really measuring and being not easy accurately to measure distinguish.And effectively raise the speed of measurement.Preferably, instrument
Including：Laser particle analyzer and optical microscope.
By the way of apparatus measures, the particle diameter of this deposited particles is measured including：
Pulverize the rock sample with deposited particles, the size making described deposited particles is 0.5-1.5mm, preferably, grain
Footpath size is 1mm；
Rock sample after pulverizing is placed in the H that concentration is 10%-20%2O2In solution, and during default one section of heating in water bath
Between, to remove organic matter, preferably, H2O2Solution concentration is 15%, and default a period of time is 10 minutes about；
Taking-up is placed in H2O2Rock sample in solution, and this rock sample is placed in the hydrochloric acid solution that concentration is 5%-15%, until
Rock sample bubble-free produces, and preferably, concentration of hydrochloric acid solution is 10%, to remove cement；
Take out the rock sample being placed in hydrochloric acid solution, and remove the H on rock sample2O2Solution and hydrochloric acid solution, are so processed, one
Aspect is conducive in latter acts to the grinding of sample it is also possible to prevent dilute hydrochloric acid from instrument is caused damage；
Grind described rock sample, to obtain independent deposited particles；
Measure the particle diameter of deposited particles using laser particle analyzer.
So far, testing sample preparation finishes, and puts it in laser particle analyzer, then directly can read granule size,
Avoid the accuracy of impurity interferometry, just can measure the particle diameter accurately measuring deposited particles.
The depth of paleochannel is the residual thickness measurement using ancient times water channel deposit.Due to water channel water volume flow rate relatively
Hurry up, the ability of transported deposit thing stronger, the deposit being formed therefore in water channel mostly is the granularity rock type larger compared with thick, granule
Type.But, the growth of water channel has the characteristics that often to change its course, and is weakened due to flow velocity, transporting capacity weakens, now shape after changing its course
The deposit becoming mostly is granularity compared with thin, the less rock type of granule.So, regular the changing its course of water channel, then result in brill
The rock type that well obtains has coarse grain and interacts the feature developed in fine rock longitudinal direction.We pass through measurement particulate twice
The growth thickness of folded coarse rock between rock, then can obtain the thickness of the water channel deposition in certain period, and water channel sinks
Long-pending thickness can substantially reflect the depth of paleochannel.On this basis, the paleochannel depth that measurement many phases develop, and ask for it
Meansigma methodss, obtain paleochannel depth with this, carry out subsequent calculating.
In order to more accurately calculate ancient times water channel deposit residual thickness,
The thickness of coarse grain of many phases deposition can first be measured；The meansigma methodss calculating coarse grain deposition described in many phases again are as ancient water
Road deposit residual thickness.
The residual thickness of deposit can react the depth of the paleochannel forming deposition period indirectly, under statistically
In the rock sample drilling through, the thickness of coarse granule of many phases deposition, to measure paleochannel depth.The feature of loke shore water channel deposition is water of many phases
Road is longitudinally superimposed, and the coarse grain deposition in lithological sequence represents water channel deposition, and all has fine-grained sediment conduct between each issue coarse grain water channel
Interval, therefore, should count the thickness of each issue coarse grain deposit development, then ask for its meansigma methods and remain thickness as water channel deposition is average
Degree, and then calculate depth d of paleochannel, further according to the mean particle size D of deposited particles50Calculate tiltedly with paleochannel depth d
Slope band Gu gradient S.
As shown in figure 4, calculate deposit horizontal-extending after X and S according to equation below calculate relative water depth become
Change amplitude；
H=X × S
Wherein H is relative water depth amplitude of variation, and X is deposit extended distance under water, and S is the slope belt Gu gradient.As Fig. 4 institute
Show, the tangent value of angle a is slope belt Gu gradient S.
The computational methods of relative water depth amplitude of variation provided in an embodiment of the present invention, by using the glutenite in multiple places
Percentage composition calculating the horizontal-extending distance of deposit, because glutenite is to bury underwater, will not suffer erosion, so just
Avoid and easily degraded due to deposit above water, and the measurement causing is inaccurate；And by improving measuring and calculating deposition
The mean particle size D of granule50Mode, the mode employing apparatus measures makes the accuracy of data that measurement obtains improve.
And then make the reliability calculating the horizontal-extending distance of deposit higher, and then make by the slope belt Gu gradient and deposit water
The accuracy of the relative water depth amplitude of variation that flat extended distance calculates is higher.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. slope belt Gu gradient computational methods are it is characterised in that include：
Obtain the mean particle size of deposited particles；
Paleochannel depth is calculated according to the ancient times water channel deposit residual thickness measuring；
According to described mean particle size and the paleochannel depth calculation slope belt Gu gradient.
2. slope belt according to claim 1 Gu gradient computational methods it is characterised in that
Also include before the described mean particle size obtaining deposited particles：
Obtain multiple deposited particles；
Measure the particle diameter of each deposited particles using mode measured directly；
If the particle diameter of deposited particles is less than default limit value, by the way of apparatus measures, the particle diameter of this deposited particles is entered
Row measurement, and obtain direct measurement value as grain diameter measurement value；
If the particle diameter of deposited particles is not less than default limit value, using the direct measurement obtaining value as grain diameter measurement value；
Mean particle size is calculated according to the described grain diameter measurement value of each deposited particles.
3. slope belt Gu gradient computational methods according to claim 2 are it is characterised in that described instrument includes：Laser grain
Degree instrument and optical microscope.
4. slope belt Gu gradient computational methods according to claim 2 are it is characterised in that also include：
Measure the thickness of coarse grain of many phases deposition；
The meansigma methodss calculating coarse grain deposition described in many phases are as ancient times water channel deposit residual thickness.
5. slope belt Gu gradient computational methods according to claim 1 are it is characterised in that also include：According to equation below
Calculate the slope belt Gu gradient：
S=0.141 × D50×d-1
Wherein, S is the slope belt Gu gradient, D50For the mean particle size of deposited particles, d is paleochannel depth.
6. slope belt Gu gradient computational methods according to claim 1 are it is characterised in that calculate relatively according to equation below
Water depth ratio amplitude；
H=X × S
Wherein H is relative water depth amplitude of variation, and X is the horizontal-extending distance of deposit, and S is the slope belt Gu gradient.
7. slope belt according to claim 1 Gu gradient computational methods are it is characterised in that by the way of apparatus measures pair
The particle diameter of this deposited particles measure including：
Pulverize the rock sample with deposited particles, the size making described deposited particles is 0.5-1.5mm；
Rock sample after pulverizing is placed in the H that concentration is 10%-20%2O2In solution, and heating in water bath default a period of time；
Taking-up is placed in H2O2Rock sample in solution, and this rock sample is placed in the hydrochloric acid solution that concentration is 5%-15%, until rock sample
Bubble-free produces；
Take out the rock sample being placed in hydrochloric acid solution, and remove the H on rock sample2O2Solution and hydrochloric acid solution；
Grind described rock sample, to obtain independent deposited particles；
Measure the particle diameter of deposited particles using laser particle analyzer.
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| CN107620036B (en) * | 2017-09-14 | 2019-11-26 | 中国科学院合肥物质科学研究院 | The method for preparing detection substrate film using ion sputtering process |
| CN108629130B (en) * | 2018-05-10 | 2019-09-24 | 山东科技大学 | The method for determining the control Lu Yuan dispersed organic matter distribution delta regime outer rim gradient |
| CN109374867B (en) * | 2018-12-21 | 2021-07-06 | 青岛科技大学 | Gravel hydraulic fracturing simulation method based on discrete elements |
| CN109856681B (en) * | 2019-01-08 | 2020-10-16 | 西南石油大学 | Process analysis method for describing morphological change of water channel along direction of material source |
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