CN106021739B - A method of to being layered reservoir Thermal Density Current tracer - Google Patents
A method of to being layered reservoir Thermal Density Current tracer Download PDFInfo
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- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000009792 diffusion process Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 abstract description 13
- 230000008676 import Effects 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 20
- 239000000243 solution Substances 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
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- 238000004088 simulation Methods 0.000 description 2
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- 230000004069 differentiation Effects 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F30/30—Circuit design
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Abstract
The invention discloses a kind of methods to being layered reservoir Thermal Density Current tracer, include mainly the following steps：It performs landform and finishes grid and import in software for calculation, incoming is selected to flow required fundamental equation, select to be suitble to calculate desired Turbulent Model and its parameter；The physical attribute and Thermal properties of incoming water body are set according to incoming water body actual conditions simultaneously.A kind of tracer is added in software for calculation and the convective-diffusion equation and its parameter for calculating Tracer kinetics are set；Tracer solubility is set in incoming as A；After calculating, outer profile boundaries of the B% as temperature difference interflow of incoming tracer concentration is chosen, then the physical characteristics such as the specific thickness of interflow and the specific location where center line can clearly be shown.The advantage of the invention is that：It can clearly illustrate moving situation of temperature difference interflow, including its shape, thickness and center etc.；It ensure that the accuracy of calculating.
Description
Technical field
The invention belongs to flow detection technique field, more particularly to a kind of side to being layered reservoir Thermal Density Current tracer
Method.
Background technology
It is layered in reservoir, when incoming water body density ratio environment water superficial density is big, will be formed in reservoir entrance
Subsurface flow.Two kinds of movement shapes different from layering Environment of Reservoirs water body density according to incoming water body density, being variously formulated
Condition：The underflow moved always along base slope and the interflow being detached from burble point during base slope invades environment water.Due to water in underflow
The difference of temperature and the water temperature of environment water, therefore can be easy to be distinguished in numerical simulation, generally takes its density gradient to be
As the interface between underflow and environment water at zero；And the interflow in Environment of Reservoirs water body is layered for intrusion, it is limited
It is almost the same with ambient enviroment water temperature in the water temperature of interflow, just from the perspective of water temperature, it is difficult to distinguish intrusion environment water
In density current movement locus.Typically now general way is that tracer is added in incoming, such as liquor potassic permanganate, or
Other tracers that can be distinguished by color of person, the differentiation of boundary line is carried out by the color of tracer；It is such
It can really show interflow water body, but therefore the density that the incoming water body of liquor potassic permanganate is added changes again, and thus
Pure Thermal Density Current institute in being layered Environment of Reservoirs water body can not be embodied completely by causing the characteristics of motion of mixed solution
The characteristics of motion of the interflow of formation.
Invention content
Goal of the invention：For problems of the prior art, the present invention provides a kind of to being layered reservoir Thermal Density Current
The method of tracer, the change for avoiding incoming physical attribute and Thermal properties caused by the addition of tracer are tied to calculating
The influence of fruit, it is ensured that accuracy.
Technical solution：In order to solve the above technical problems, the present invention provide it is a kind of to layering reservoir Thermal Density Current tracer
Method, steps are as follows：
The first step：According to reservoir actual landform, by the depth of water in each place of reservoir and the length and width data of liquid level
The model of reservoir figure for being suitble to numerical computations is established after acquisition, and model of reservoir figure is divided into lattice-like pattern and is stored in computer
In；
Second step：Involved fundamental equation during establishment water body flow, including：Continuity equation, the equation of momentum, energy
Equation is measured, k- ε RNG Turbulent Models is selected to be calculated；
Third walks：It is arranged come flowing water in software such as ansys fluent softwares according to incoming water body actual conditions
The physical attribute and Thermal properties of body, including density, specific heat, thermal coefficient, coefficient of thermal expansion, viscosity；
4th step：Any other a small amount of solution is added in incoming as tracer, such as hydrochloric acid solution, and it is molten to change hydrochloric acid
The original essential attribute parameter of liquid changes the basic physical attribute of tracer in software such as ansys fluent softwares
Keep it completely the same with the essential attribute of incoming with Thermal properties, including density, specific heat, thermal coefficient, coefficient of thermal expansion, viscous
Property coefficient；The physical attribute and Thermal properties for changing its tracer by software are avoided due to tracer under normal circumstances
Addition caused by incoming physical attribute and Thermal properties influence of the change to result of calculation, ensure that the essence finally calculated
True property, it is ensured that finally can accurately determine the profile and border of layering reservoir Thermal Density Current.
5th step：The convective-diffusion equation for calculating Tracer kinetics is set, and wherein convective-diffusion equation is embodied asIn formula, uiFor the flow velocity in the directions coordinate system i；xiThe directions coordinate system i coordinate；C is the molten of tracer
Degree；T is the time；D is tracer diffusion coefficient；R is source item；
6th step：Setting tracer concentration in incoming, as A, wherein A is 5~20g/L；
7th step：The temperature difference that the B% of selection incoming tracer concentration enters layering reservoir formation as incoming water body is different heavy
The outer profile boundary of stream, the then water body that concentration B% isopleth is wrapped up are tracer object-Thermal Density Current, and wherein B%'s takes
Value is 4~20%.The present invention determines Thermal Density Current that layering reservoir is formed by the concentration of tracer and incoming water body
Outer profile boundary, method is simple, as a result shows more accurate.
Further, tracer diffusion coefficient D is set in step 5 as zero, it is zero to concurrently set source item R.Tracer is spread
Coefficient D is zero and indicates：The movement of tracer is only moved with incoming water body from the influence for not having diffusion in water body.It is logical
It crosses and diffusion coefficient is set as zero, then avoid tracer and the diffusion of incoming water body is impacted during the motion, prevent
Result of calculation is influenced in follow-up calculating, ensure that the accuracy finally calculated, it is ensured that finally can accurately determine layering reservoir
The profile and border of Thermal Density Current.
Further, in step 7 in the B% of incoming tracer concentration, B values are 5~15.
Further, in step 7 in the B% of incoming tracer concentration, B values are 10.
Compared with the prior art, the advantages of the present invention are as follows：
1, the present invention can clearly illustrate the moving situation of Thermal Density Current in layering reservoir, including its shape, thickness
And center etc., the present invention can accurately determine the profile and border of layering reservoir Thermal Density Current.
2, when the present invention carries out tracer to layering reservoir Thermal Density Current, adding due to tracer under normal circumstances is avoided
Influence of the change of incoming physical attribute and Thermal properties to result of calculation caused by adding, and tracer is set in calculating process
The diffusion coefficient of agent is zero, ensure that tracer in reservoir only with the defeated shifting movement of incoming, to ensure that the accurate of display
Property.
Specific tracer was needed when 3, studying interflow originally, but the present invention proposes that any different solutions can act as
Tracer, and the addition of tracer does not influence result of calculation.Original most of face for all using tracer of addition tracer
Color comes to the dizzy east of incoming water body into line trace, and the method for addition tracer changes the density of incoming water body, to calculating
As a result it impacts, and method of the present invention determines the wheel of layering reservoir Thermal Density Current by the concentration to tracer
Wide boundary will not impact result of calculation.The present invention is mainly realized by following method：A, change and be used as tracer
Solution original physical attribute and Thermal properties keep it consistent with the physical attribute of incoming and Thermal properties；B, change
The parameter in the convective-diffusion equation of reactor solution movement is calculated in numerical simulation, sets the diffusion coefficient of tracer as zero.
Description of the drawings
Fig. 1 is Thermal Density Current movement schematic diagram in layering reservoir；
Fig. 2 is example reservoir initial time distribution of water temperature figure；
Tracer concentration isogram in reservoir when Fig. 3 is t=50s in example；
Tracer concentration isogram in reservoir when Fig. 4 is t=120s in example；
Fig. 5 is t=120s time laminar flows outer profile boundary graph in example.
Specific implementation mode
With reference to ansys school editions and specific implementation mode, the present invention is furture elucidated.
Embodiment one：As shown in Figs. 1-5, include mainly the following steps：
The first step：According to reservoir actual landform, by the depth of water in each place of reservoir and the length and width data of liquid level
The model of reservoir figure for being suitble to numerical computations is established after acquisition, and model of reservoir figure is divided into lattice-like pattern and is stored in computer
In；
Second step：Involved fundamental equation during establishment water body flow, including：Continuity equation, the equation of momentum, energy
Equation is measured, k- ε RNG Turbulent Models is selected to be calculated；
Third walks：It is arranged come flowing water in software such as ansys fluent softwares according to incoming water body actual conditions
The physical attribute and Thermal properties of body, including density, specific heat, thermal coefficient, coefficient of thermal expansion, viscosity；As shown in Figure 2
Initial time water temperature of reservoir distribution map, incoming water temperature are 17.5 DEG C；
4th step：A small amount of hydrochloric acid solution is added in incoming as tracer, it is soft in software such as ansys or fluent
Changing the original basic physical attribute of hydrochloric acid solution and Thermal properties in part keeps it completely the same with the essential attribute of incoming, wraps
Include density, specific heat, thermal coefficient, coefficient of thermal expansion, viscosity；Change the physical attribute and heating power of its tracer by software
Attribute is learned, the change pair of incoming physical attribute and Thermal properties caused by the addition of tracer under normal circumstances is avoided
The influence of result of calculation ensure that the accuracy finally calculated, it is ensured that finally can accurately determine that the layering reservoir temperature difference is different heavy
The profile and border of stream.
5th step：The convective-diffusion equation for calculating Tracer kinetics is set, and wherein convective-diffusion equation is specifically shown in formula 1：
In formula, uiFor the flow velocity in the directions coordinate system i；xiThe directions coordinate system i coordinate；C is the solubility of tracer；T is the time；D
For tracer diffusion coefficient；R is source item.
Formula (1) is the fundamental equation of Tracer kinetics, and the side influenced on tracer concentration variation is can be seen that in formula (1)
Formula includes mainly three aspects：Section 2, Section 3 and Section 4 in convective term, diffusion term and source item, i.e. formula (1) are right respectively
Answer tracer with caused by incoming water sports, concentration difference tracer diffusion and tracer inflow/outflow zoning
Such three kinds the case where tracer concentration in computational domain being had an impact in water body.In particular, for some fixed bit
The concentration variation of tracer is by with incoming water body entrance/flow out showing for the volumetric in the water body of the place's of setting such as certain volume
It track agent, the volumetric tracer self-propagating and flows out/flows into without tracer in the computational domain of this volumetric.
6th step：It is 10g/ml that the concentration of hydrochloric acid solution, which is converted to quality solubility, in incoming, then fortune of the tracer in water body
It is dynamic to be described with above-mentioned formula (1), due to the physics of the physical attribute and Thermal properties and incoming water body of tracer
Attribute is identical with Thermal properties, although adding tracer in incoming water body, the essential attribute of incoming water body there is no by
To any influence, therefore, movement of the incoming of tracer in reservoir is added, and there is no be therefore affected；To convection current
When coefficient is configured in diffusion equation, source item is set as zero, i.e., no tracer flows out/flow into computational domain, and sets tracer
Agent diffusion coefficient is zero, i.e. tracer is not spread, only with the travel motion of incoming water body, then the movement of tracer and incoming
The motion path of water body is essentially identical.
7th step：According to it is above-mentioned be provided with calculating after, according to actual conditions, show the concentration isopleth of tracer, root
According to using the 10% of incoming pollutant concentration in being studied about pollutant interflow as pollutant interflow outer contour, with incoming
The outer profile boundary of interflow after the 10% of tracer concentration enters as incoming in environment water in water body, then can be clearly
Show the specific location where the elementary contour, thickness and center line of temperature difference interflow.It completes after calculating, shows the dense of tracer
Spend isogram, as Fig. 3 be t=50s when reservoir in tracer concentration isogram, Fig. 4 be t=120s reservoirs in tracer
Concentration isogram, take the 10% of concentration of hydrochloric acid solution as interflow outer profile boundary, then the outer profile of interflow is shown in figure
5。
Embodiment two：Steps are as follows by the present invention：
The first step：According to reservoir actual landform, by the depth of water in each place of reservoir and the length and width data of liquid level
The model of reservoir figure for being suitble to numerical computations is established after acquisition, and model of reservoir figure is divided into lattice-like pattern and is stored in computer
In；
Second step：Involved fundamental equation during establishment water body flow, including：Continuity equation, the equation of momentum, energy
Equation is measured, k- ε RNG Turbulent Models is selected to be calculated；
Third walks：It is arranged come flowing water in software such as ansys fluent softwares according to incoming water body actual conditions
The physical attribute and Thermal properties of body, including density, specific heat, thermal coefficient, coefficient of thermal expansion, viscosity；
4th step：Any other a small amount of solution is added in incoming as tracer, such as hydrochloric acid solution, and it is molten to change hydrochloric acid
The original essential attribute parameter of liquid changes the basic physical attribute of tracer in software such as ansys fluent softwares
Keep it completely the same with the essential attribute of incoming with Thermal properties, including density, specific heat, thermal coefficient, coefficient of thermal expansion, viscous
Property coefficient；The physical attribute and Thermal properties for changing its tracer by software are avoided due to tracer under normal circumstances
Addition caused by incoming physical attribute and Thermal properties influence of the change to result of calculation, ensure that the essence finally calculated
True property, it is ensured that finally can accurately determine the profile and border of layering reservoir Thermal Density Current.
5th step：The convective-diffusion equation for calculating Tracer kinetics is set, and wherein convective-diffusion equation is embodied asIn formula, uiFor the flow velocity in the directions coordinate system i；xiThe directions coordinate system i coordinate；C is the molten of tracer
Degree；T is the time；D is tracer diffusion coefficient；R is source item；Tracer diffusion coefficient D is set as zero, concurrently setting source item R is
Zero.Tracer diffusion coefficient D is zero and indicates：The movement of tracer is only moved with incoming water body not to be had in water body certainly
The influence of diffusion.By the way that diffusion coefficient is set as zero, then diffusion of the tracer during the motion to incoming water body is avoided
It impacts, prevents from influencing result of calculation in subsequently calculating, ensure that the accuracy finally calculated, it is ensured that finally can be accurate
Determine the profile and border of layering reservoir Thermal Density Current.
6th step：Setting tracer concentration in incoming, as A, wherein A is 5g/L；
7th step：The temperature difference that the B% of selection incoming tracer concentration enters layering reservoir formation as incoming water body is different heavy
The outer profile boundary of stream, the then water body that concentration B% isopleth is wrapped up are tracer object-Thermal Density Current, and wherein B%'s takes
Value is 4%.The present invention determines the foreign steamer of the Thermal Density Current of layering reservoir formation by the concentration of tracer and incoming water body
Wide boundary, method is simple, as a result shows more accurate.
Embodiment three：The first step：According to reservoir actual landform, by the depth of water in each place of reservoir and the length of liquid level and
The model of reservoir figure for being suitble to numerical computations is established after width data acquisition, and model of reservoir figure is divided into lattice-like pattern deposit
In computer；
Second step：Involved fundamental equation during establishment water body flow, including：Continuity equation, the equation of momentum, energy
Equation is measured, k- ε RNG Turbulent Models is selected to be calculated；
Third walks：It is arranged come flowing water in software such as ansys fluent softwares according to incoming water body actual conditions
The physical attribute and Thermal properties of body, including density, specific heat, thermal coefficient, coefficient of thermal expansion, viscosity；
4th step：Any other a small amount of solution is added in incoming as tracer, such as hydrochloric acid solution, and it is molten to change hydrochloric acid
The original essential attribute parameter of liquid changes the basic physical attribute of tracer in software such as ansys fluent softwares
Keep it completely the same with the essential attribute of incoming with Thermal properties, including density, specific heat, thermal coefficient, coefficient of thermal expansion, viscous
Property coefficient；The physical attribute and Thermal properties for changing its tracer by software are avoided due to tracer under normal circumstances
Addition caused by incoming physical attribute and Thermal properties influence of the change to result of calculation, ensure that the essence finally calculated
True property, it is ensured that finally can accurately determine the profile and border of layering reservoir Thermal Density Current.
5th step：The convective-diffusion equation for calculating Tracer kinetics is set, and wherein convective-diffusion equation is embodied asIn formula, uiFor the flow velocity in the directions coordinate system i；xiThe directions coordinate system i coordinate；C is the molten of tracer
Degree；T is the time；D is tracer diffusion coefficient；R is source item；Tracer diffusion coefficient D is set as zero, concurrently setting source item R is
Zero.Tracer diffusion coefficient D is zero and indicates：The movement of tracer is only moved with incoming water body not to be had in water body certainly
The influence of diffusion.By the way that diffusion coefficient is set as zero, then diffusion of the tracer during the motion to incoming water body is avoided
It impacts, prevents from influencing result of calculation in subsequently calculating, ensure that the accuracy finally calculated, it is ensured that finally can be accurate
Determine the profile and border of layering reservoir Thermal Density Current.
6th step：Setting tracer concentration in incoming, as A, wherein A is 20g/L；
7th step：The temperature difference that the B% of selection incoming tracer concentration enters layering reservoir formation as incoming water body is different heavy
The outer profile boundary of stream, the then water body that concentration B% isopleth is wrapped up are tracer object-Thermal Density Current, and wherein B%'s takes
Value is 20%.The present invention determines the foreign steamer of the Thermal Density Current of layering reservoir formation by the concentration of tracer and incoming water body
Wide boundary, method is simple, as a result shows more accurate.
Example the above is only the implementation of the present invention is not intended to restrict the invention, and the present invention is for numerical value meter
The accurately display of research object is especially suitable in calculation.It is all the present invention principle within, made by equivalent replacement, should be included in
Within protection scope of the present invention.The content that the present invention is not elaborated, which belongs to well known to this professional domain technical staff, to be had
Technology.
Claims (4)
1. a kind of method to being layered reservoir Thermal Density Current tracer, it is characterised in that：Steps are as follows：
The first step：According to reservoir actual landform, the depth of water in each place of reservoir and the length and width data of liquid level are acquired
The model of reservoir figure for being suitble to numerical computations is established afterwards, and model of reservoir figure is divided into lattice-like pattern deposit computer；
Second step：Involved fundamental equation during establishment water body flow, including：Continuity equation, the equation of momentum, energy side
Journey selects k- ε RNG Turbulent Models to be calculated；
Third walks：The physical attribute and Thermal properties of incoming water body are set in software according to incoming water body actual conditions, wrapped
Include density, specific heat, thermal coefficient, coefficient of thermal expansion, viscosity；
4th step：Other solution are added in incoming as tracer, change in software tracer basic physical attribute and
Thermal properties keep it completely the same with the essential attribute of incoming, including density, specific heat, thermal coefficient, coefficient of thermal expansion and viscous
Property coefficient；
5th step：The convective-diffusion equation for calculating Tracer kinetics is set, and wherein convective-diffusion equation is embodied asIn formula, uiFor the flow velocity in the directions coordinate system i；xiThe directions coordinate system i coordinate；C is the molten of tracer
Degree；T is the time；D is tracer diffusion coefficient；R is source item；
6th step：Setting tracer concentration in incoming, as A, wherein A is 5~20g/L；
7th step：The B% for choosing incoming tracer concentration enters the Thermal Density Current for being layered that reservoir is formed as incoming water body
Outer profile boundary, the then water body that concentration B% isopleth is wrapped up are tracer object-Thermal Density Current, and the wherein value of B% is
4~20%.
2. a kind of method to being layered reservoir Thermal Density Current tracer according to claim 1, it is characterised in that：Described
Tracer diffusion coefficient D is set in five steps as zero, it is zero to concurrently set source item R.
3. a kind of method to being layered reservoir Thermal Density Current tracer according to claim 1 or 2, it is characterised in that：Institute
It states in the 7th step in the B% of incoming tracer concentration, B values are 5~15.
4. a kind of method to being layered reservoir Thermal Density Current tracer according to claim 1, it is characterised in that：The step
In rapid seven in the B% of incoming tracer concentration, B values are 10.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007060446A1 (en) * | 2005-11-26 | 2007-05-31 | The University Court Of The University Of Edinburgh | Improvements in and relating to hydrocarbon recovery from a hydrocarbon reservoir |
| CN102620903A (en) * | 2012-03-22 | 2012-08-01 | 河海大学 | Dynamic display system for streak line in water flow and display method for streak line |
| CN103741641A (en) * | 2013-12-20 | 2014-04-23 | 河海大学 | Device and method used for river and lake relation experimental research and suitable for river and lake intersection water system |
| CN203639881U (en) * | 2013-11-27 | 2014-06-11 | 河海大学 | Model test device for obtaining permeating flow rate by simulating artificial tracing |
| CN104504170A (en) * | 2014-11-20 | 2015-04-08 | 中国科学院计算技术研究所 | Animated simulation method and system of vehicle |
-
2016
- 2016-05-24 CN CN201610348035.3A patent/CN106021739B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007060446A1 (en) * | 2005-11-26 | 2007-05-31 | The University Court Of The University Of Edinburgh | Improvements in and relating to hydrocarbon recovery from a hydrocarbon reservoir |
| CN102620903A (en) * | 2012-03-22 | 2012-08-01 | 河海大学 | Dynamic display system for streak line in water flow and display method for streak line |
| CN203639881U (en) * | 2013-11-27 | 2014-06-11 | 河海大学 | Model test device for obtaining permeating flow rate by simulating artificial tracing |
| CN103741641A (en) * | 2013-12-20 | 2014-04-23 | 河海大学 | Device and method used for river and lake relation experimental research and suitable for river and lake intersection water system |
| CN104504170A (en) * | 2014-11-20 | 2015-04-08 | 中国科学院计算技术研究所 | Animated simulation method and system of vehicle |
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