CN104504239B - The method and apparatus for obtaining the migration characteristics of gas-liquid interface in oil reservoir - Google Patents
The method and apparatus for obtaining the migration characteristics of gas-liquid interface in oil reservoir Download PDFInfo
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- CN104504239B CN104504239B CN201410687236.7A CN201410687236A CN104504239B CN 104504239 B CN104504239 B CN 104504239B CN 201410687236 A CN201410687236 A CN 201410687236A CN 104504239 B CN104504239 B CN 104504239B
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Abstract
The invention provides a kind of method and apparatus for obtaining the migration characteristics of gas-liquid interface in oil reservoir, this method initially sets up the different vertical bundle model of radius of oil reservoir；Then, gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and the gas-liquid interface leading edge migration velocity in vertical bundle model in each vertical hollow billet are obtained；Secondly, according to the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity, the corresponding difference in height for calculating gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet；Finally by the gas-liquid interface in each vertical hollow billet and the difference in height drafting pattern of its gas-liquid interface leading edge locus, so as to go out the migration characteristics of gas-liquid interface by the figure quantization signifying.
Description
Technical field
The present invention relates to crestal gas injection gravity to drive technical field, and gas-liquid interface in oil reservoir is obtained more particularly, to one kind
Migration characteristics method and apparatus.
Background technology
It is that a kind of more typical gas drive improves oil recovery factor technology that crestal gas injection gravity, which drives technology, in oil exploitation industry
Existing longer applicating history.Because oil reservoir often has stronger heterogeneous and anisotropy, and gas viscosity is less than
Viscosity of crude, gas is injected in conventional gas drive technology and is easily promoted along the stronger orientation preferentially of individual layer or percolation ability.Oil reservoir stores up
Layer crestal gas injection gravity drives the gravity fractionation that technology is then effectively utilized gas, and the displacement in conventional levels direction is changed into
Vertical displacement, to increase the swept volume of gas, improve oil recovery.
The migration characteristics for obtaining gas-liquid interface in oil reservoir are the keys of crestal gas injection gravity drive technology.At present, it is existing
Technology is under actual reservoir condition, by specific monitoring well routine test, obtains monitoring materials, and qualitatively analysis obtains oil
The migration characteristics of gas-liquid interface in Tibetan, this method are relatively common but right when actual oil reservoir application gas injection gravity drives technology
Gas-liquid interface feature can not carry out quantificational description.
The content of the invention
It is an object of the invention to provide it is a kind of obtain oil reservoir in gas-liquid interface migration characteristics method and apparatus,
To obtain the migration characteristics of gas-liquid interface in the oil reservoir of quantification.
To reach above-mentioned purpose, on the one hand, the invention provides a kind of migration for obtaining gas-liquid interface in oil reservoir is special
The method of sign, comprises the following steps：
Establish the different vertical bundle model of the radius of oil reservoir；
The gas-liquid interface tension force in the vertical bundle model in each vertical hollow billet, gas-liquid density, gas-liquid is obtained to glue
Degree, angle of wetting and gas-liquid interface leading edge migration velocity；
According to gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid circle in each vertical hollow billet
Edge migration velocity in front, the corresponding height for calculating gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet
Difference；
By the gas-liquid interface in each vertical hollow billet and the difference in height drafting pattern of its gas-liquid interface leading edge locus.
The method for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, the radius for establishing oil reservoir
Different vertical bundle model, is specifically included：
Capillary pressure curve is obtained by mercury injection method indoor test；
According to formulaThe oil reservoir is reduced to a series of vertical capillary bunch of different radiis, wherein,
riFor the radius of vertical i-th hollow billet in the vertical capillary bunch, piIt is vertical i-th hollow billet in the vertical capillary bunch in institute
State corresponding pressure in capillary pressure curve.
The method for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, it is described to obtain the vertical capillary bunch
Gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and the migration of gas-liquid interface leading edge in model in each vertical hollow billet
Speed, specifically include：
Gas-liquid interface tension force in each vertical hollow billet is determined by sessile drop method；
By inquiring about gas density and viscosity in gas density and viscosity table acquisition each vertical hollow billet；
Fluid density in each vertical hollow billet is determined by densitometer；
Pass through the liquid viscosity described in rotary viscosity design determining in each vertical hollow billet；And
Angle of wetting in each vertical hollow billet is determined by contact angle method；
Data is changed according to the interface of oil and gas that actual monitoring well monitoring in oil field obtains, obtains gas-liquid interface leading edge migration speed
Degree.
The method for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, the vertical bundle model are two
Individual radius different the first vertical hollow billet and the second vertical hollow billet.
The method for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, it is described according to each vertical hair
Gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity in pipe, it is corresponding to calculate institute
The difference in height of the gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet is stated, is specially：
According to formulaCalculate gas-liquid circle in the described first vertical hollow billet
Height difference H (the r between gas-liquid interface in face and the second vertical hollow billet2), wherein, σogFor gas-liquid interface tension force；θ1、θ2
The angle of wetting of gas-liquid interface in respectively described first vertical hollow billet and the gas-liquid interface in the second vertical hollow billet；
r1、r2The radius of respectively described first vertical hollow billet and the second vertical hollow billet；ρg、ρoRespectively described first vertical hair
Gas, the density of liquid in pipe and the described second vertical hollow billet；μg、μoRespectively described first vertical hollow billet and described second
The viscosity of gas, liquid in vertical hollow billet；G is acceleration of gravity.
On the other hand, present invention also offers a kind of device for obtaining gas-liquid interface migration characteristics in oil reservoir, including：
Model building module, the different vertical bundle model of radius for establishing oil reservoir；
Parameter acquisition module, for obtaining the gas-liquid interface in the vertical bundle model in each vertical hollow billet
Power, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity；
Difference in height acquisition module, for according to the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid
Viscosity, angle of wetting and gas-liquid interface leading edge migration velocity, the corresponding gas-liquid interface calculated in each vertical hollow billet and its gas
The difference in height of liquid interface leading edge locus；
Migration characteristics acquisition module, for by the gas-liquid interface in each vertical hollow billet and its gas-liquid interface leading edge position
The difference in height drafting pattern put.
The device for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, the radius for establishing oil reservoir
Different vertical bundle model, is specifically included：
Capillary pressure curve is obtained by mercury injection method indoor test；
According to formulaThe oil reservoir is reduced to a series of vertical capillary bunch of different radiis, wherein,
riFor the radius of vertical i-th hollow billet in the vertical capillary bunch, piIt is vertical i-th hollow billet in the vertical capillary bunch in institute
State corresponding pressure in capillary pressure curve.
The device for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, it is described to obtain the vertical capillary bunch
Gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and the migration of gas-liquid interface leading edge in model in each vertical hollow billet
Speed, specifically include：
Gas-liquid interface tension force in each vertical hollow billet is determined by sessile drop method；
By inquiring about gas density and viscosity in gas density and viscosity table acquisition each vertical hollow billet；
Fluid density in each vertical hollow billet is determined by densitometer；
Pass through the liquid viscosity described in rotary viscosity design determining in each vertical hollow billet；And
Angle of wetting in each vertical hollow billet is determined by contact angle method；
Data is changed according to the interface of oil and gas that actual monitoring well monitoring in oil field obtains, obtains gas-liquid interface leading edge migration speed
Degree.
The device for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, the vertical bundle model are two
Individual radius different the first vertical hollow billet and the second vertical hollow billet.
The device for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the present invention, it is described according to each vertical hair
Gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity in pipe, it is corresponding to calculate institute
The difference in height of the gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet is stated, is specially：
According to formulaCalculate gas-liquid circle in the described first vertical hollow billet
Height difference H (the r between gas-liquid interface in face and the second vertical hollow billet2), wherein, σogFor gas-liquid interface tension force；θ1、θ2
The angle of wetting of gas-liquid interface in respectively described first vertical hollow billet and the gas-liquid interface in the second vertical hollow billet；
r1、r2The radius of respectively described first vertical hollow billet and the second vertical hollow billet；ρg、ρoRespectively described first vertical hair
Gas, the density of liquid in pipe and the described second vertical hollow billet；μg、μoRespectively described first vertical hollow billet and described second
The viscosity of gas, liquid in vertical hollow billet；G is acceleration of gravity.
The present invention initially sets up the different vertical bundle model of radius of oil reservoir；Then, vertical hair is obtained
Restrain gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge in each vertical hollow billet in model
Migration velocity；Secondly, according to the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid
Interface leading edge migration velocity, the corresponding height for calculating gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet
Difference；Finally by the gas-liquid interface in each vertical hollow billet and the difference in height drafting pattern of its gas-liquid interface leading edge locus, so as to lead to
Cross the migration characteristics that the figure quantization signifying has gone out gas-liquid interface.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, not
Form limitation of the invention.In the accompanying drawings：
Fig. 1 is the method flow diagram for obtaining the migration characteristics of gas-liquid interface in oil reservoir of the embodiment of the present invention；
Fig. 2 is capillary pressure curve schematic diagram in the embodiment of the present invention；
Fig. 3 is the gas-liquid interface position view in different capillary radius in the embodiment of the present invention；
Fig. 4 is the gas-liquid interface difference in height under different gas-liquid migration velocities in different capillary radius in the embodiment of the present invention；
Fig. 5 is the structured flowchart for obtaining the device of the migration characteristics of gas-liquid interface in oil reservoir of the embodiment of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further details.Here, the schematic description and description of the present invention is used to explain the present invention, but do not make
For limitation of the invention.
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in further detail.
With reference to shown in figure 1, the method for the migration characteristics of gas-liquid interface includes in the acquisition oil reservoir of the embodiment of the present invention
Following steps：
Step S101, the different vertical bundle model of the radius of oil reservoir is established.Specifically：
First, capillary pressure curve is obtained by mercury injection method indoor test；
Secondly, according to formulaOil reservoir is reduced to a series of vertical capillary bunch of different radiis, it is maximum
Vertical hollow billet radius according to pressure mercury measuring minimum pressure values (or entering mercury replacement pressure) determine, minimum vertical hair
The maximum pressure value that the radius of pipe is tested by pressure mercury determines that the capillary radius of other different tube diameters can be needed most according to research
Greatly, determined in the data area that minimum capillary radius determines, so as to form bundle model.Wherein, riFor in vertical capillary bunch
The radius of vertical i-th hollow billet, piFor vertical i-th hollow billet corresponding pressure in capillary pressure curve in vertical capillary bunch.
Step S102, gas-liquid interface tension force, gas-liquid density, the gas in vertical bundle model in each vertical hollow billet are obtained
Fluid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity.Specifically, the gas-liquid in each vertical hollow billet is determined by sessile drop method
Interfacial tension；By inquiring about gas density and viscosity in gas density and each vertical hollow billet of viscosity table acquisition；Pass through density
Meter determines the fluid density in each vertical hollow billet；Pass through the liquid viscosity in each vertical hollow billet of rotary viscosity design determining；It is logical
The angle of wetting crossed in each vertical hollow billet of contact angle method measure；And oil gas circle obtained is monitored according to oil field actual monitoring well
Face changes data, obtains gas-liquid interface leading edge migration velocity.
Step S103, according to the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, angle of wetting and
Gas-liquid interface leading edge migration velocity, the corresponding height for calculating gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet
Degree is poor.By taking the vertical bundle model that the first different vertical hollow billet of two radiuses and the second vertical hollow billet are formed as an example, according to
FormulaCalculate the gas-liquid interface and the second vertical hair in the first vertical hollow billet
Height difference H (r between gas-liquid interface in pipe2), as shown in Figure 3.Wherein, σogFor gas-liquid interface tension force；θ1、θ2Respectively
The angle of wetting of gas-liquid interface in one vertical hollow billet and the gas-liquid interface in the second vertical hollow billet；r1、r2Respectively first is vertical
The radius of hollow billet and the second vertical hollow billet；ρg、ρoRespectively first vertical hollow billet and gas in the second vertical hollow billet, liquid
Density；μg、μoRespectively first vertical hollow billet and gas in the second vertical hollow billet, the viscosity of liquid；G is acceleration of gravity,
p1g、p2gGas pressure in respectively first vertical hollow billet and the second vertical hollow billet at gas-liquid interface, p2o p1oRespectively first
Fluid pressure in vertical hollow billet and the second vertical hollow billet at gas-liquid interface.
Step S104, the difference in height of gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet is depicted as
Figure is with the migration characteristics of gas-liquid interface in quantization signifying oil reservoir.
The method of the embodiment of the present invention is illustrated below：
Certain reservoir oil layer temperature-averaging is 104.4 DEG C, formation pressure 20.0MPa, gasoil horizon tension force 14mN/m, and crude oil is close
Spend 776kg/m3, gas density 456kg/m3, viscosity of crude 0.8mPa.s, gas viscosity 0.04mPa.s, gas-liquid interface migration
Speed is 0.01m/d, acceleration of gravity 9.81m/s2.Do not consider angle of wetting, i.e. angle of wetting is assumed to be 0 degree.Oil reservoir hollow billet
Pressure curve, as shown in Figure 2, it is assumed that three kinds of interface migration velocities, i.e., 0,0.01m/d and 0.1m/d, and with 73.5 μm of pore throats
Interior gas-liquid interface is highly 0m, under different interface migration velocities, the gasoil horizon height calculation results in different capillary radius
As shown in Figure 4.Under same capillary radius, gas-liquid interface migration velocity is bigger, and gas-liquid interface height is bigger.By taking 2 μm of pore throats as an example,
Its internal gas-liquid interface is 4.73m, boundary velocity 0.01m/d when static relative to the gas-liquid interface in 73.5 μm of pore throats
When be 5.09m, be 15.72m during boundary velocity 0.1m/d.Example shows that the method for the embodiment of the present invention can realize gas-liquid circle
The quantification of region feature calculates.
The inventive method embodiment initially sets up the different vertical bundle model of radius of oil reservoir；Then,
It is gentle to obtain gas-liquid interface tension force in vertical bundle model in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, angle of wetting
Liquid interface leading edge migration velocity；Secondly, according to the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, profit
Wet angle and gas-liquid interface leading edge migration velocity, the corresponding gas-liquid interface calculated in each vertical hollow billet and its gas-liquid interface leading edge position
The difference in height put；Finally the difference in height of gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet is depicted as
Figure, so as to go out the migration characteristics of gas-liquid interface by the figure quantization signifying.
With reference to shown in figure 5, the side for obtaining the migration characteristics of gas-liquid interface in oil reservoir with the embodiments of the present invention
Method is corresponding, and the device of the migration characteristics of gas-liquid interface includes model building module in the acquisition oil reservoir of the embodiment of the present invention
51st, parameter acquisition module 52, difference in height acquisition module 53 and migration characteristics acquisition module 54, wherein：
Model building module 51, the different vertical bundle model of radius for establishing oil reservoir；Specifically：
First, capillary pressure curve is obtained by mercury injection method indoor test；
Secondly, according to formulaOil reservoir is reduced to a series of vertical capillary bunch of different radiis, it is maximum
Vertical hollow billet radius according to pressure mercury measuring minimum pressure values (or entering mercury replacement pressure) determine, minimum vertical hair
The maximum pressure value that the radius of pipe is tested by pressure mercury determines that the capillary radius of other different tube diameters can be needed most according to research
Greatly, determined in the data area that minimum capillary radius determines, so as to form bundle model.Wherein, riFor in vertical capillary bunch
The radius of vertical i-th hollow billet, piFor vertical i-th hollow billet corresponding pressure in capillary pressure curve in vertical capillary bunch.
Parameter acquisition module 52, for obtain gas-liquid interface tension force in vertical bundle model in each vertical hollow billet,
Gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity；Specifically, determined by sessile drop method each vertical
Gas-liquid interface tension force in hollow billet；By inquiring about the gas density in gas density and each vertical hollow billet of viscosity table acquisition and gluing
Degree；Fluid density in each vertical hollow billet is determined by densitometer；By in each vertical hollow billet of rotary viscosity design determining
Liquid viscosity；Angle of wetting in each vertical hollow billet is determined by contact angle method；And obtained according to the monitoring of oil field actual monitoring well
The interface of oil and gas change data obtained, obtains gas-liquid interface leading edge migration velocity.
Difference in height acquisition module 53, for being glued according to the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid
Degree, angle of wetting and gas-liquid interface leading edge migration velocity, the corresponding gas-liquid interface calculated in each vertical hollow billet and its gas-liquid interface
The difference in height of leading edge locus；The vertical capillary bunch mould formed with the first different vertical hollow billet of two radiuses and the second vertical hollow billet
Exemplified by type, according to formulaCalculate gas-liquid interface in the first vertical hollow billet with
Height difference H (the r between gas-liquid interface in second vertical hollow billet2), as shown in Figure 3.Wherein, σogFor gas-liquid interface tension force；θ1、
θ2The angle of wetting of gas-liquid interface in respectively first vertical hollow billet and the gas-liquid interface in the second vertical hollow billet；r1、r2Respectively
For the first vertical hollow billet and the radius of the second vertical hollow billet；ρg、ρoGas in respectively first vertical hollow billet and the second vertical hollow billet
The density of body, liquid；μg、μoRespectively first vertical hollow billet and gas in the second vertical hollow billet, the viscosity of liquid；G is gravity
Acceleration, p1g、p2gGas pressure in respectively first vertical hollow billet and the second vertical hollow billet at gas-liquid interface, p2o p1oRespectively
For the fluid pressure at gas-liquid interface in the first vertical hollow billet and the second vertical hollow billet.
Migration characteristics acquisition module 54, for by the gas-liquid interface in each vertical hollow billet and its gas-liquid interface leading edge locus
Difference in height drafting pattern.
In apparatus of the present invention embodiment, model building module 51 establishes the different vertical hollow billet of radius of oil reservoir
Beam model；It is close that parameter acquisition module 52 obtains gas-liquid interface tension force in vertical bundle model in each vertical hollow billet, gas-liquid
Degree, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity；Difference in height acquisition module 53 is according in each vertical hollow billet
Gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity, correspondingly calculate each vertical
The difference in height of gas-liquid interface and its gas-liquid interface leading edge locus in hollow billet；Migration characteristics acquisition module 54 is by each vertical hollow billet
The difference in height drafting pattern of interior gas-liquid interface and its gas-liquid interface leading edge locus, so as to go out gas-liquid by the figure quantization signifying
The migration characteristics at interface.
Those skilled in the art will also be appreciated that various illustrative components, blocks, unit and the step that the embodiment of the present invention is listed
Suddenly can be realized by the combination of hardware, software or both.Realized to hardware or software is then passed through depending on specific
Application and whole system design requirement.Those skilled in the art be able to can use various for every kind of specific application
Method realizes described function, but this realization is understood not to the scope beyond protection of the embodiment of the present invention.
Various illustrative logical blocks described in the embodiment of the present invention, or unit can by general processor,
Digital signal processor, application specific integrated circuit (ASIC), field programmable gate array or other programmable logic devices, discrete gate
Or the design of transistor logic, discrete hardware components, or any of the above described combination is come the function described by realizing or operate.General place
It can be microprocessor to manage device, and alternatively, the general processor can also be any traditional processor, controller, microcontroller
Device or state machine.Processor can also be realized by the combination of computing device, such as digital signal processor and microprocessor,
Multi-microprocessor, one or more microprocessors combine a Digital Signal Processor Core, or any other like configuration
To realize.
The step of method or algorithm described in the embodiment of the present invention can be directly embedded into hardware, computing device it is soft
Part module or the combination of both.Software module can be stored in RAM memory, flash memory, ROM memory, EPROM storages
Other any form of storaging mediums in device, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this area
In.Exemplarily, storaging medium can be connected with processor, to allow processor to read information from storaging medium, and
Write information can be deposited to storaging medium.Alternatively, storaging medium can also be integrated into processor.Processor and storaging medium can
To be arranged in ASIC, ASIC can be arranged in user terminal.Alternatively, processor and storaging medium can also be arranged at use
In different parts in the terminal of family.
In one or more exemplary designs, above-mentioned function described by the embodiment of the present invention can be in hardware, soft
Part, firmware or any combination of this three are realized.If realized in software, these functions can store and computer-readable
On medium, or with one or more instruction or code form be transmitted on the medium of computer-readable.Computer readable medium includes electricity
Brain storaging medium and it is easy to so that allowing computer program to be transferred to other local telecommunication medias from a place.Storaging medium can be with
It is that any general or special computer can be with the useable medium of access.For example, such computer readable media can include but
It is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or other
What can be used for carrying or store with instruct or data structure and it is other can be by general or special computer or general or specially treated
The medium of the program code of device reading form.In addition, any connection can be properly termed computer readable medium, example
Such as, if software is to pass through a coaxial cable, fiber optic cables, double from a web-site, server or other remote resources
Twisted wire, Digital Subscriber Line (DSL) or with defined in being also contained in of the wireless way for transmitting such as infrared, wireless and microwave
In computer readable medium.Described disk (disk) and disk (disc) include Zip disk, radium-shine disk, CD, DVD, floppy disk
And Blu-ray Disc, disk is generally with magnetic duplication data, and disk generally carries out optical reproduction data with laser.Combinations of the above
It can also be included in computer readable medium.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, the guarantor being not intended to limit the present invention
Scope is protected, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in this
Within the protection domain of invention.
Claims (6)
- A kind of 1. method for obtaining the migration characteristics of gas-liquid interface in oil reservoir, it is characterised in that comprise the following steps：Establish the different vertical bundle model of the radius of oil reservoir；Obtain gas-liquid interface tension force in the vertical bundle model in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, profit Wet angle and gas-liquid interface leading edge migration velocity；Before the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid interface Edge migration velocity, the corresponding difference in height for calculating gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet；By the gas-liquid interface in each vertical hollow billet and the difference in height drafting pattern of its gas-liquid interface leading edge locus；Wherein,The different vertical bundle model of radius for establishing oil reservoir, is specifically included：Capillary pressure curve is obtained by mercury injection method indoor test；According to formulaThe oil reservoir is reduced to a series of vertical capillary bunch of different radiis, wherein, riFor institute State the radius of vertical i-th hollow billet in vertical capillary bunch, piIt is vertical i-th hollow billet in the vertical capillary bunch in the hollow billet Corresponding pressure in pressure curve；Gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid circle according in each vertical hollow billet Edge migration velocity in front, the corresponding height for calculating gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet Difference, it is specially：According to formulaCalculate the gas-liquid interface and second in the first vertical hollow billet Height difference H (r between gas-liquid interface in vertical hollow billet2), wherein, σogFor gas-liquid interface tension force；θ1、θ2Respectively described The angle of wetting of gas-liquid interface in one vertical hollow billet and the gas-liquid interface in the second vertical hollow billet；r1、r2It is respectively described The radius of first vertical hollow billet and the second vertical hollow billet；ρg、ρoRespectively described first vertical hollow billet and described second vertical The density of gas, liquid in hollow billet；μg、μoRespectively described first vertical hollow billet and gas in the second vertical hollow billet, The viscosity of liquid；G is acceleration of gravity.
- 2. the method according to claim 1 for obtaining the migration characteristics of gas-liquid interface in oil reservoir, it is characterised in that institute State and obtain gas-liquid interface tension force in the vertical bundle model in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, wetting Angle and gas-liquid interface leading edge migration velocity, are specifically included：Gas-liquid interface tension force in each vertical hollow billet is determined by sessile drop method；By inquiring about gas density and viscosity in gas density and viscosity table acquisition each vertical hollow billet；Fluid density in each vertical hollow billet is determined by densitometer；Pass through the liquid viscosity described in rotary viscosity design determining in each vertical hollow billet；AndAngle of wetting in each vertical hollow billet is determined by contact angle method；Data is changed according to the interface of oil and gas that actual monitoring well monitoring in oil field obtains, obtains gas-liquid interface leading edge migration velocity.
- 3. the method according to claim 1 for obtaining the migration characteristics of gas-liquid interface in oil reservoir, it is characterised in that institute Vertical bundle model is stated as two radiuses different the first vertical hollow billet and the second vertical hollow billet.
- A kind of 4. device for obtaining the migration characteristics of gas-liquid interface in oil reservoir, it is characterised in that including：Model building module, the different vertical bundle model of radius for establishing oil reservoir；Parameter acquisition module, for obtaining gas-liquid interface tension force, gas in the vertical bundle model in each vertical hollow billet Liquid-tight degree, gas-liquid viscosity, angle of wetting and gas-liquid interface leading edge migration velocity；Difference in height acquisition module, for being glued according to the gas-liquid interface tension force in each vertical hollow billet, gas-liquid density, gas-liquid Degree, angle of wetting and gas-liquid interface leading edge migration velocity, the corresponding gas-liquid interface calculated in each vertical hollow billet and its gas-liquid The difference in height of interface leading edge locus；Migration characteristics acquisition module, for by the gas-liquid interface in each vertical hollow billet and its gas-liquid interface leading edge locus Difference in height drafting pattern；Wherein,The different vertical bundle model of radius for establishing oil reservoir, is specifically included：Capillary pressure curve is obtained by mercury injection method indoor test；According to formulaThe oil reservoir is reduced to a series of vertical capillary bunch of different radiis, wherein, riFor institute State the radius of vertical i-th hollow billet in vertical capillary bunch, piIt is vertical i-th hollow billet in the vertical capillary bunch in the hollow billet Corresponding pressure in pressure curve；Gas-liquid interface tension force, gas-liquid density, gas-liquid viscosity, angle of wetting and gas-liquid circle according in each vertical hollow billet Edge migration velocity in front, the corresponding height for calculating gas-liquid interface and its gas-liquid interface leading edge locus in each vertical hollow billet Difference, it is specially：According to formulaCalculate the gas-liquid interface and second in the first vertical hollow billet Height difference H (r between gas-liquid interface in vertical hollow billet2), wherein, σogFor gas-liquid interface tension force；θ1、θ2Respectively described The angle of wetting of gas-liquid interface in one vertical hollow billet and the gas-liquid interface in the second vertical hollow billet；r1、r2It is respectively described The radius of first vertical hollow billet and the second vertical hollow billet；ρg、ρoRespectively described first vertical hollow billet and described second vertical The density of gas, liquid in hollow billet；μg、μoRespectively described first vertical hollow billet and gas in the second vertical hollow billet, The viscosity of liquid；G is acceleration of gravity.
- 5. the device according to claim 4 for obtaining the migration characteristics of gas-liquid interface in oil reservoir, it is characterised in that institute State and obtain gas-liquid interface tension force in the vertical bundle model in each vertical hollow billet, gas-liquid density, gas-liquid viscosity, wetting Angle and gas-liquid interface leading edge migration velocity, are specifically included：Gas-liquid interface tension force in each vertical hollow billet is determined by sessile drop method；By inquiring about gas density and viscosity in gas density and viscosity table acquisition each vertical hollow billet；Fluid density in each vertical hollow billet is determined by densitometer；Pass through the liquid viscosity described in rotary viscosity design determining in each vertical hollow billet；AndAngle of wetting in each vertical hollow billet is determined by contact angle method；Data is changed according to the interface of oil and gas that actual monitoring well monitoring in oil field obtains, obtains gas-liquid interface leading edge migration velocity.
- 6. the device according to claim 4 for obtaining the migration characteristics of gas-liquid interface in oil reservoir, it is characterised in that institute Vertical bundle model is stated as two radiuses different the first vertical hollow billet and the second vertical hollow billet.
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| 低渗透油藏毛管压力曲线特征分析及应用;彭彩珍等;《西南石油学院学报》;20020430;第24卷(第2期);全文 * |
| 储层毛管压力曲线构造方法及其应用;刘晓鹏等;《西南石油大学学报（自然科学版）》;20081231;第30卷(第6期);全文 * |
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