CN109882161A - A method of simulation fracture-pore reservoir gas injection gas migration rule - Google Patents
A method of simulation fracture-pore reservoir gas injection gas migration rule Download PDFInfo
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Abstract
The invention discloses a kind of methods for simulating fracture-pore reservoir gas injection gas migration rule, include the following steps: step 1: preparing the first substance and the second substance being in a liquid state under normal temperature and pressure, the density contrast and crude oil of first substance and the second substance are identical as the density contrast of gas, the density of crude oil is the oil density under fracture-pore reservoir environment, and the density of gas is the gas density of the injection under fracture-pore reservoir environment；Step 2: preparing simulation model under normal temperature and pressure, simulation model is fractured model or fractured-porous reservoir model；Step 3: under normal temperature and pressure, with the first substance Simulation of Crude Oil, gas is simulated with the second substance, first the first substance is filled in simulation model, the second substance is injected in simulation model again, the migration rule of fracture-pore reservoir gas injection gas is simulated by the migration rule of the second substance.This method can carry out at low cost, visualization range greatly under normal temperature and pressure and can be compared with accurate simulation fracture-pore reservoir gas injection gas migration rule.
Description
Technical field
The present invention relates to oil field development technical fields, and in particular to a kind of simulation fracture-pore reservoir gas injection gas migration rule
Method.
Background technique
Tarim Basin is the important oil-and-gas basin in China, wherein fracture-pore reservoir rich reserves.Fracture-cavity type carbonate
Reservoir Heterogeneity is extremely strong, and system in Tahe Oilfield utilizes water flood recovery technology, and injection salt water lifts fracture hole body lower part crude oil liquid level
It rises, achievees the purpose that increase oil.After water injection well failure, nitrogen, " attic oil " on displacement fracture hole body top, to solve can be injected
The problem of oil reservoir " primiparity is high, failure is fast ".It is surplus between acquisition fracture hole body using unit gas injection on the basis of individual well gas injection
Excess oil realizes that well group scale increases oil.System in Tahe Oilfield adds up 9.4 hundred million side of gas injection since progress gas injection pilot test in 2012,
Increase 2,640,000 tons of oil.
Physical analogy is the method by laboratory physical simulation experiment actual physical process.Fracture-pore reservoir is opened
Hair, can be using the fracture-pore reservoir water filling under physical simulating method simulation complex stratum condition, gas injection development process, for system
Fixed science meets the actual developing value in oil field, achievees the purpose that economy, rationally, efficiently develops oil fields with important
Meaning.
Currently, carrying out physical simulating method to fracture-pore reservoir waterflooding extraction process, two kinds are generally comprised.One kind is room temperature
Under normal pressure, by physical simulating device carry out physical analogy, physical simulating device can be used portrayed based on seismic data it is similar
Model (" fracture-pore reservoir large scale visualization water drive oil physical simulation experiment and the machine that Zheng little Min, Sun Lei, Wang Lei et al. are proposed
Manage [J], geological science and technology information, 2010,29 (2): 77-80 " etc.), rule model (Lv Aimin, Li Gangzhu, Xie Hao can also be used
" fracture-cavity units water drive oil note milling machine reason experimental study [J], science and technology and engineering, 2015,15 (18): 50- that monarch et al. proposes
54 " etc.)；Another kind is physical analogy to be carried out by physical simulating device, likewise, physical simulating device can under high temperature and pressure
Using close copy (" the more well fracture-cavity units water drives that Hou Jirui, Li Haibo, Jiang Yu et al. are proposed portrayed based on seismic data
Water breakthrough mode macroscopic three dimensional physical analogy [J], Petroleum finance, 2014,41 (6): 717-722 " etc.), it can also use
Rule model (" fracture hole type media flow mechanism experiment and the numerical simulation study, 2009, doctoral thesis " that Wang Diansheng is proposed
Deng).
Above two physical simulating method can be used to simulate waterflooding extraction rule, can be relatively good instruct field practice
With oil field development.But when using same method simulation gas injection development, there are following technical problems:
One, when by physical simulating device carrying out gas injection simulation at normal temperatures and pressures, cannot preferable simulation gas it is close
Degree, because injecting the density of nitrogen substantially 0.35g/cm in oil reservoir in practical oil recovery process3, and nitrogen under normal temperature and pressure
Density substantially 0.00125g/cm3If not specially treated, gas density gap is too big, so will lead to and replaces in simulation
Speed and migration rule and in the earth formation actual conditions have larger difference.
If two, preferably to simulate gas density, need to be carried out under substantially 60Mpa and 120 ° of high-temperature and high-pressure conditions
Simulation, physical unit under the high temperature and pressure although can simulation stratum condition gas injection development rule, involve great expense (general
Every set price reaches 500,000 yuan -150 ten thousand yuan), and visual range is smaller (form size is not more than 25cm2 under 30MPa high pressure), and
Equipment is than cumbersome；Meanwhile there is the potential danger to experimenter in the simulated environment of high temperature and pressure.
Therefore, how providing one kind, that at low cost, visualization range can be carried out under normal temperature and pressure is big and can more accurate mould
The method of quasi- fracture-pore reservoir gas injection gas migration rule becomes for those skilled in the art's technical problem urgently to be solved.
Summary of the invention
Present invention solves the technical problem that being that at low cost, visualization range can be carried out under normal temperature and pressure by providing one kind
It greatly and can be compared with the method for accurate simulation fracture-pore reservoir gas injection gas migration rule.
The present invention provides a kind of method for simulating fracture-pore reservoir gas injection gas migration rule, includes the following steps:
Step 1: preparing the first substance and the second substance being in a liquid state under normal temperature and pressure, first substance with it is described
The density contrast and crude oil of second substance are identical as the density contrast of gas, and the density of the crude oil is the original under fracture-pore reservoir environment
Oil density, the density of the gas are the gas density of the injection under fracture-pore reservoir environment；
Step 2: preparing simulation model under normal temperature and pressure, the simulation model is fractured model or fractured-porous reservoir mould
Type；
Step 3: under normal temperature and pressure, with the first substance Simulation of Crude Oil, gas is simulated with second substance, first will
First substance is filled in the simulation model, then second substance is injected in the simulation model, passes through second
The migration rule of substance simulates the migration rule of fracture-pore reservoir gas injection gas.
Preferably, the sequence of step 1 and step 2 can be interchanged.
Preferably, first substance is salt water, second substance is the presentation and the salt water difference face of dyeing
The oil of color.
Preferably, the gas is nitrogen.
Preferably, the simulation model be fractured-porous reservoir model, the fractured-porous reservoir model include four solution cavities, four
A solution cavity shape is identical and is sphere, four solution cavities, four apexes arranged evenly in a rectangle, and two
The solution cavity is located in higher same level, and solution cavity described in another two is located in lower same level, the rectangle
Four sides be four cracks, two solution cavities in each crack and its both ends are respectively communicated with, each described molten
Hole is also connected to an other crack respectively, and the fracture width in the crack is not less than 0.1mm.
Preferably, the diameter of the solution cavity is 10mm.
Preferably, the simulation model is fractured model, the fractured model includes upper and lower two disposed in parallel and splits
Seam, respectively by two vertical cracks connections disposed in parallel between two horizontal fractures, described two horizontal fractures and
The fracture width in described two vertical cracks is not less than 0.1mm.
Preferably, the range of described two horizontal fractures and the fracture width in described two vertical cracks is 0.5-3mm.
Preferably, described two horizontal fractures and the fracture width in described two vertical cracks be 0.5mm or 1mm or
Person 2mm or 3mm.
Preferably, second substance is the oil of dyeing, simulated using the fractured-porous reservoir model, it is described to split
Seam-solution cavity model fracture width is 1mm, solution cavity diameter is 10mm, configuration density 1200kg/m3Salt water be described first
Substance is to simulate the crude oil, configuration density 800kg/m3Oil be second substance to simulate the nitrogen, first by institute
It states salt water and injects the fractured-porous reservoir model, then the oil is injected into the simulation model with the speed of 0.6m/s.
Preferably, second substance is the oil of dyeing, simulated using the fractured-porous reservoir model, it is described to split
Seam-solution cavity model fracture width is 1mm, solution cavity diameter is 10mm, configuration density 1220kg/m3Salt water be described first
Substance is to simulate the crude oil, configuration density 820kg/m3Oil be second substance to simulate the nitrogen, first by institute
It states salt water and injects the fractured-porous reservoir model, then the oil is injected into the simulation model with the speed of 0.4m/s.
Preferably, second substance is the oil of dyeing, simulated using the fractured-porous reservoir model, it is described to split
Seam-solution cavity model fracture width is 1mm, solution cavity diameter is 10mm, configuration density 1200kg/m3Salt water be described first
Substance is to simulate the crude oil, configuration density 800kg/m3Oil be second substance to simulate the nitrogen, first by institute
It states salt water and injects the fractured-porous reservoir model, then the oil is injected into the simulation model with the speed of 0.8m/s.
Preferably, further including step 4: being simulated using the verifying of VOF method for numerical simulation using the simulation model
The reliability of migration rule.
Preferably, being added in the first substance of Xiang Suoshu or in second substance with coloured dye in step 1
Material,
Alternatively, adding the first dyestuff to first substance, second of dyestuff is added in the second substance of Xiang Suoshu, it is described
The first dyestuff and second of dyestuff are two kinds of dyestuffs of different colours.
The method of the simulation fracture-pore reservoir gas injection gas migration rule of offer of the present invention, has following technology effect
Fruit:
Migration form according to fracture-pore reservoir gas injection gas is gravitational differentiation and the drift of hole relevant to seam hole structure top
It moves, this method uses the first substance Simulation of Crude Oil under normal temperature and pressure environment, simulates gas using the second substance, and pass through simulation
The density contrast of gas and crude oil under reservoir condition, Lai Shixian reach the migration rule of injection gas under the conditions of observation fracture-pore reservoir
Rule, further efficiently to instruct fracture-pore reservoir gas injection development in practice；It is simulated used in provided method and method
Model is operated in the environment of normal temperature and pressure, low in cost and safe operation process, while complete equipment can universe
Visually, much larger than the visual range of high temperature and pressure, gas flowing law in fracture-pore reservoir can clearly be observed.
Preferably, the first substance is salt water, the second substance is presentation and the oil of the salt water different colours of dyeing, should
Substance easily obtains, and can further decrease the cost of this method, while convenient for distinguishing the first substance and the second substance, being easy to
Observe the migration rule of the second substance.
Preferably, gas is nitrogen, it is easy to obtain and cost is relatively low.
Preferably, simulation model is that regular fractured-porous reservoir model or fractured model, simulation model are easy to manufacture.
Preferably, the fracture width in simulation model is not less than 0.1mm, to guarantee that the oil of simulation gas can pass through
Crack.
Preferably, characteristic, such as density, viscosity of substance for using in the analogy method etc. are inputted VOF model
In, the picture of specific simulation gas migration rule is calculated and is converted to by numerical value in VOF model, then will be real in this method
The migration rule for the gas that border is observed and above-mentioned numerical simulation picture compare verifying, can further determine that this method is simulated
Reliability, and then more reliable foundation is provided for practical oil field development.
Preferably, added into the first substance or in second substance with coloured dyestuff in step 1, or
Person adds the first dyestuff to the first substance, second of dyestuff is added into the second substance, the first dyestuff and second of dyestuff
For two kinds of dyestuffs of different colours, it is easy to distinguish the two.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of fractured-porous reservoir model provided by the present invention；
Fig. 2 is the structural schematic diagram of fractured model provided by the present invention；
Fig. 3 is the schematic diagram for simulating fracture-pore reservoir gas injection gas migration rule in the present invention in first embodiment；
Fig. 4 is the schematic diagram for simulating fracture-pore reservoir gas injection gas migration rule in the present invention in second embodiment；
Fig. 5 is the schematic diagram for simulating fracture-pore reservoir gas injection gas migration rule in the present invention in 3rd embodiment.
Appended drawing reference in Fig. 1-5 is as follows:
1 solution cavity, 2 cracks, 3 salt water, 4 oil.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention
Applying mode, the present invention is described in further detail.
As shown in Figs. 1-5, Fig. 1 is the structural schematic diagram of fractured-porous reservoir model provided by the present invention；Fig. 2 is the present invention
The structural schematic diagram of provided fractured model；Fig. 3 is to simulate fracture-pore reservoir gas injection gas in the present invention in first embodiment
The schematic diagram of migration rule；Fig. 4, which is that simulation fracture-pore reservoir gas injection gas migration is regular in second embodiment in the present invention, to be shown
It is intended to；Fig. 5 is the schematic diagram for simulating fracture-pore reservoir gas injection gas migration rule in the present invention in 3rd embodiment.
The present invention provides a kind of method for simulating fracture-pore reservoir gas injection gas migration rule, includes the following steps:
Step 1: the first substance and the second substance being in a liquid state, the first substance and the second substance are prepared under normal temperature and pressure
Density contrast and crude oil it is identical as the density contrast of gas, the density of crude oil is the oil density under fracture-pore reservoir environment, gas
Density be fracture-pore reservoir environment under injection gas density；
Step 2: preparing simulation model under normal temperature and pressure, simulation model is the fractured model being connected or is connected
Fractured-porous reservoir model；
Step 3: under normal temperature and pressure, with the first substance Simulation of Crude Oil, gas is simulated with the second substance, first by the first substance
It is filled in simulation model, then the second substance is injected in simulation model, fracture hole is simulated by the migration rule of the second substance
The migration rule of type reservoir gas injection gas.
Migration form according to fracture-pore reservoir gas injection gas is gravitational differentiation and the drift of hole relevant to seam hole structure top
It moves, this method uses the first substance Simulation of Crude Oil at normal temperatures and pressures, simulates gas using the second substance, and pass through simulation oil reservoir
Under the conditions of gas and crude oil density contrast, Lai Shixian reach observation fracture-pore reservoir under the conditions of inject gas migration rule, into
One step is efficiently to instruct fracture-pore reservoir gas injection development in practice；Simulation model used in provided method and method is equal
To be operated in the environment of normal temperature and pressure, low in cost and safe operation process, while complete equipment can universe it is visual, far
Greater than the visual range of high temperature and pressure, gas flowing law in fracture-pore reservoir can be clearly observed.
The sequence of step one and step 2 mentioned above is unrestricted, and the two can be interchanged.
In this method, in the specific implementation, the first substance is common salt water 3, i.e., is configured by sodium chloride, when implementation
Configuration is density brine, and the second substance is that dyeing is the oil 4 presented with the salt water different colours, which can be real
The crude oil that border is produced from underground.
First substance be salt water 3, the second substance be oil 4, two kinds of substances easily obtain, can further decrease this method at
This.
During practical gas-injection oil-production, often inject the nitrogen easily obtained, institute in this way in, preferred gas is also
Nitrogen.
Further, as described in Figure 1, simulation model can be fractured-porous reservoir model comprising four solution cavities 1, four solution cavities
1 shape is identical and is sphere, and four solution cavities 1, four apexes arranged evenly in a rectangle, two solution cavities 1 are located at higher
Same level on, another two solution cavity 1 is located in lower same level, and four sides of rectangle are four cracks 2, each
Crack 2 and two solution cavities 1 at its both ends are respectively communicated with, and each solution cavity 1 is also connected to an other crack 2 respectively, wherein is split
The fracture width of seam is not less than 0.1mm.
The fractured-porous reservoir model is the model of rule, easy to manufacture.It is of course also possible to irregular simulation model is manufactured, than
The diameter for several solution cavities for such as including is different, including several cracks width it is also different.It is required that fracture width is not
Less than 0.1mm, to guarantee that the oil of simulation gas can pass through crack.
During realistic simulation, the oil 4 for simulating gas is injected by crack 2, oil 4 enters solution cavity, the process along crack 2
It is observed by whole process, passes through the motion process of observation oil 4, it is known that inject the migration rule of the nitrogen of underground in practical oil recovery process.
It can simulate several times, every time in simulation, the speed of injection oil 4 can be different, and then by observing corresponding migration rule,
Analog go out it is general inject a gas into subsurface deposit at a same speed after, the migration rule of the gas, for example, injection oil 4
If speed it is lesser, cannot may smoothly pass through simulation model, should for this purpose, in practical oil recovery process
Nitrogen is injected to oil reservoir to be greater than the numerical value speed of the speed.As it can be seen that fracture-pore reservoir in practice can be instructed by the simulation
Gas injection development, and then oil recovery efficiency can be improved and promote oil production.
Wherein, the diameter of solution cavity 1 can be 10mm.
Due to the structure and its complexity of actual underground fracture-pore reservoir, thus simulation model be not limited to it is above-mentioned, such as
Fractured model as shown in Figure 2 can be used comprising upper and lower two cracks 2 disposed in parallel, between two horizontal fractures 2
It is connected to respectively by two vertical cracks 2 disposed in parallel, described two horizontal fractures 2 and described two vertical cracks 2 are split
Slit width degree is not less than 0.1mm.
Further, the range of fracture width is 0.5-3mm.
Further, fracture width is 0.5mm or 1mm or 2mm or 3mm.
In the present invention, Fig. 3-5, respectively the three of this method embodiment, the fracture-pore reservoir gas injection gas of simulation are seen
The display of corresponding migration rule.
Simulation model used by these three embodiments is fractured-porous reservoir model, the fracture width of fractured-porous reservoir model
It is 10mm for 1mm, solution cavity diameter.
In first embodiment, configuration density 1220kg/m3Salt water 3 be the first substance to simulate the crude oil, configuration
Density is 820kg/m3Oil 4 be the second substance to simulate nitrogen, the salt water is first injected into the fractured-porous reservoir model, then
Oil 4 is injected into simulation model with the speed of 0.6m/s, migration rule is as shown in figure 3, oil 4, that is, " gas " simulated enter molten
Behind hole, beaten on the wall surface of solution cavity along the direction of jet stream, form eddy flow, and occur it is broken, a part along link up crack into
Enter next solution cavity, other a part are assembled at the top of solution cavity.Pass through the display of the migration rule of the embodiment, it is known that work as nitrogen
After injecting practical fracture-pore reservoir with the speed of 0.6m/s, the migration rule of the nitrogen.
In second embodiment, configuration density 1220kg/m3Salt water 3 be the first substance with Simulation of Crude Oil, configuration density
For 820kg/m3Oil 4 be the second substance to simulate nitrogen, the salt water is first injected into the fractured-porous reservoir model, then by oil 4
Simulation model is injected with the speed of 0.4m/s, migration rule is as shown in figure 4, oil 4, that is, after " gas " simulated enters solution cavity,
After oily section enters solution cavity, spheroidal is gradually presented, under the jet action of liquid, oil droplet is divided into upper and lower two parts, top oil
Drop is assembled at the top of solution cavity, and lower part oil droplet is altered to next solution cavity.Pass through the display of the migration rule of the embodiment, it is known that work as nitrogen
After injecting practical fracture-pore reservoir with the speed of 0.4m/s, the migration rule of the nitrogen.
In 3rd embodiment, configuration density 1200kg/m3Salt water 3 be the first substance with Simulation of Crude Oil, configuration density
For 800kg/m3Oil 4 be the second substance to simulate nitrogen, the salt water is first injected into the fractured-porous reservoir model, then by oil 4
Simulation model is injected with the speed of 0.8m/s, migration rule is as shown in figure 5, oil 4, that is, after " gas " simulated enters solution cavity,
Occur to be crushed in crack, into after solution cavity, be beaten on the wall surface of solution cavity along the direction of jet stream, form eddy flow, and occurs broken
It is broken, partially along crack is linked up into next solution cavity, partially assemble at the top of solution cavity.Pass through the aobvious of the migration rule of the embodiment
Show, it is known that after nitrogen injects practical fracture-pore reservoir with the speed of 0.8m/s, the migration rule of the nitrogen.
In above three embodiments oil 4 migration rule, can by that can instruct in practical oil recovery process show Fig. 3-5, when
When injecting nitrogen with identical speed, migration rule of the nitrogen in fracture-pore reservoir.
Further, further include step 4: being simulated using the verifying of VOF method for numerical simulation using the simulation model
The reliability of migration rule.
It inputs in VOF model, characteristic, such as density, viscosity of substance for using in the analogy method etc. in VOF mould
It calculates and is converted to the picture of specific simulation gas migration rule in type by numerical value, then will be actually observed in this method
The migration rule of gas and above-mentioned numerical simulation picture compare verifying, can further determine that the reliability of this method simulation,
And then more reliable foundation is provided for practical oil field development.
Further, it is added in step 1, into the first substance or in the second substance with coloured dyestuff,
Alternatively, adding the first dyestuff to the first substance, second of dyestuff is added into the second substance, the first dyestuff and
Second of dyestuff is two kinds of dyestuffs of different colours.
The operation is easy to distinguish the first substance and the second substance.
Embodiment of above is only exemplary embodiments of the present invention, is not used in the limitation present invention, protection of the invention
Range is defined by the claims.Those skilled in the art within the spirit and scope of the present invention, make the present invention
Various modifications or equivalent replacements are also fallen within the protection scope of the present invention.
Claims (14)
1. a kind of method for simulating fracture-pore reservoir gas injection gas migration rule, which comprises the steps of:
Step 1: the first substance and the second substance being in a liquid state, first substance and described second are prepared under normal temperature and pressure
The density contrast and crude oil of substance are identical as the density contrast of gas, and the density of the crude oil is that the crude oil under fracture-pore reservoir environment is close
Degree, the density of the gas are the gas density of the injection under fracture-pore reservoir environment；
Step 2: preparing simulation model under normal temperature and pressure, the simulation model is fractured model or fractured-porous reservoir model；
Step 3: under normal temperature and pressure, with the first substance Simulation of Crude Oil, simulating gas with second substance, first will be described
First substance is filled in the simulation model, then second substance is injected in the simulation model, passes through the second substance
Migration rule simulate the migration rule of fracture-pore reservoir gas injection gas.
2. the method according to claim 1, wherein the sequence of step 1 and step 2 can be interchanged.
3. according to claim 1 or claim 2, which is characterized in that first substance is salt water, second substance
Presentation and the oil of the salt water different colours for dyeing.
4. according to the method described in claim 3, it is characterized in that, the gas is nitrogen.
5. according to the method described in claim 4, it is characterized in that, the simulation model be fractured-porous reservoir model, it is described to split
Seam-solution cavity model includes four solution cavities, and four solution cavity shapes are identical and are sphere, four solution cavities it is arranged evenly in
Four apexes of one rectangle, two solution cavities are located in higher same level, solution cavity described in another two be located at compared with
In low same level, four sides of the rectangle are four cracks, two institutes in each crack and its both ends
It states solution cavity to be respectively communicated with, each solution cavity is also connected to an other crack respectively, the fracture width in the crack
Not less than 0.1mm.
6. according to the method described in claim 5, it is characterized in that, the diameter of the solution cavity is 10mm.
7. according to the method described in claim 4, it is characterized in that, the simulation model is fractured model, the fractured model
Including upper and lower two cracks disposed in parallel, pass through two vertical cracks disposed in parallel respectively between two horizontal fractures
The fracture width in connection, described two horizontal fractures and described two vertical cracks is not less than 0.1mm.
8. the method according to the description of claim 7 is characterized in that described two horizontal fractures and described two vertical cracks
The range of fracture width is 0.5-3mm.
9. according to the method described in claim 8, it is characterized in that, described two horizontal fractures and described two vertical cracks
Fracture width is 0.5mm or 1mm or 2mm or 3mm.
10. according to the method described in claim 6, it is characterized in that, second substance be dyeing oil, split using described
Seam-solution cavity model is simulated, and the fracture width of the fractured-porous reservoir model is 1mm, solution cavity diameter is 10mm, configuration density
For 1200kg/m3Salt water be first substance to simulate the crude oil, configuration density 800kg/m3Oil be described second
The salt water is first injected the fractured-porous reservoir model to simulate the nitrogen by substance, then by the oil with the speed of 0.6m/s
Inject the simulation model.
11. according to the method described in claim 6, it is characterized in that, second substance be dyeing oil, split using described
Seam-solution cavity model is simulated, and the fracture width of the fractured-porous reservoir model is 1mm, solution cavity diameter is 10mm, configuration density
For 1220kg/m3Salt water be first substance to simulate the crude oil, configuration density 820kg/m3Oil be described second
The salt water is first injected the fractured-porous reservoir model to simulate the nitrogen by substance, then by the oil with the speed of 0.4m/s
Inject the simulation model.
12. according to the method described in claim 6, it is characterized in that, second substance be dyeing oil, split using described
Seam-solution cavity model is simulated, and the fracture width of the fractured-porous reservoir model is 1mm, solution cavity diameter is 10mm, configuration density
For 1200kg/m3Salt water be first substance to simulate the crude oil, configuration density 800kg/m3Oil be described second
The salt water is first injected the fractured-porous reservoir model to simulate the nitrogen by substance, then by the oil with the speed of 0.8m/s
Inject the simulation model.
13. the method according to claim 1, wherein further including step 4: being tested using VOF method for numerical simulation
The reliability for the migration rule that card is simulated using the simulation model.
14. the method according to claim 1, wherein in step 1, in the first substance of Xiang Suoshu or described
It is added in two substances with coloured dyestuff,
Alternatively, add the first dyestuff to first substance, second of dyestuff is added in the second substance of Xiang Suoshu, described first
Kind dyestuff and second of dyestuff are two kinds of dyestuffs of different colours.
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