CN106290440A - Oil displacement efficiency detection method and device - Google Patents
Oil displacement efficiency detection method and device Download PDFInfo
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- CN106290440A CN106290440A CN201510275580.XA CN201510275580A CN106290440A CN 106290440 A CN106290440 A CN 106290440A CN 201510275580 A CN201510275580 A CN 201510275580A CN 106290440 A CN106290440 A CN 106290440A
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Abstract
The invention discloses a kind of oil displacement efficiency detection method and device, this oil displacement efficiency detection method includes: rock core to be measured is carried out dehydrogenation, obtains dehydrogenation rock core；And carry out oil displacement efficiency detection based on dehydrogenation rock core.Pass through the present invention, use and rock core to be measured is carried out dehydrogenation, thus avoid the impact that displacement of reservoir oil result is detected by the protium in the mineral of rock core to be measured, solve the problem that in correlation technique, accuracy based on nmr imaging technique analysis oil displacement efficiency is low, and then reach to improve the effect of the accuracy analyzing oil displacement efficiency.
Description
Technical field
The present invention relates to oil field, in particular to a kind of oil displacement efficiency detection method and device.
Background technology
Nmr imaging technique is applied in petroleum exploration and development as a kind of emerging core analysis technology,
It is by detecting the proton contained by fluid in blowhole, such that it is able to the pore size and not of reflection rock
With the Fluid Volume in big fine pore.Owing to oil related component also containing protium, so initial dependence proton
Nmr imaging technique is difficult to further discriminate between out the distribution of oil and water, the most just cannot Accurate Analysis remain further
Oil distribution and aqueous distribution etc..The shortcoming being difficult to differentiate between oil and water for above-mentioned nmr imaging technique, relevant skill
Art personnel utilize routine simulated oil saturated core before the replacement of dehydrogenation simulated oil, and this dehydrogenation simulated oil does not contains protium,
The proton recorded in experiment is all contributed by water, by reacting condition oil change of distribution in hole of the proton of water,
Therefore improve experimental precision, this is that other normal experiment method cannot be accomplished at present.Though said method can be effective
Oil and pool are separated by ground, but the method have ignored protium contained in Rock Matrix mineral, Rock Matrix mineral
In, though contained protium amount is few, but the existence of protium have impact on the degree of accuracy analyzing oil and water distribution, affects in other words
The resolution of nmr imaging technique, thus affect oil displacement efficiency detection and the accuracy analyzed further.Additionally,
There is presently no discovery to utilize said method to adopt oil displacement efficiency to three to be analyzed.
For the problem that accuracy based on nmr imaging technique analysis oil displacement efficiency in correlation technique is low, the most still
Effective solution is not proposed.
Summary of the invention
Present invention is primarily targeted at a kind of oil displacement efficiency detection method of offer and device, to solve base in correlation technique
In the problem that the accuracy of nmr imaging technique analysis oil displacement efficiency is low.
To achieve these goals, according to an aspect of the invention, it is provided a kind of oil displacement efficiency detection method.
Oil displacement efficiency detection method according to the present invention includes: rock core to be measured is carried out dehydrogenation, obtains dehydrogenation rock core；
And carry out oil displacement efficiency detection based on dehydrogenation rock core.
Further, carry out oil displacement efficiency detection based on dehydrogenation rock core to include: use dehydrogenation simulated oil and simulated formation water
In dehydrogenation rock core, set up oil saturation and the water saturation of preset ratio, obtain the first rock core；Obtain the first rock
First nuclear magnetic resonance image of the heart；First rock core is carried out displacement of reservoir oil process, obtains the second rock core；Obtain the second rock core
Second nuclear magnetic resonance image；And carry out oil displacement efficiency inspection according to the first nuclear magnetic resonance image and the second nuclear magnetic resonance image
Survey.
Further, satisfy at the oil-containing using dehydrogenation simulated oil and simulated formation water to set up preset ratio in dehydrogenation rock core
With degree and water saturation, before obtaining the first rock core, the method also includes: dehydrogenation rock core carries out saturation simulation ground
Layer water processes, and obtains the 3rd rock core；And the 3rd nuclear magnetic resonance image of acquisition the 3rd rock core, according to the first nuclear-magnetism altogether
Shake image and the second nuclear magnetic resonance image carries out oil displacement efficiency detection and includes: according to the first nuclear magnetic resonance image, the second core
Magnetic resonance image (MRI) and the 3rd nuclear magnetic resonance image carry out oil displacement efficiency detection.
Further, before dehydrogenation rock core is carried out saturation simulation formation water process, the method also includes: to dehydrogenation
Rock core carries out evacuation process, and wherein, the dehydrogenation rock core after processing evacuation carries out saturation simulation formation water process.
Further, carry out oil displacement efficiency detection according to the first nuclear magnetic resonance image and the second nuclear magnetic resonance image to include:
The oil mass of the first rock core is obtained according to the first nuclear magnetic resonance image；The second rock core is obtained according to the second nuclear magnetic resonance image
Oil mass；And obtain oil displacement efficiency according to the oil mass of the first rock core and the oil mass of the second rock core.
Further, the first rock core is carried out displacement of reservoir oil process, obtain the second rock core and include: the first rock core is carried out water drive
Oil processing, obtains the second rock core.
Further, the first rock core being carried out water drive oil process, after obtaining the second rock core, the method also includes:
Second rock core is carried out three and adopts displacement of reservoir oil process, obtain the 4th rock core；Obtain the 4th nuclear magnetic resonance image of the 4th rock core；
And according to the second nuclear magnetic resonance image and the 4th nuclear magnetic resonance image carry out three adopt oil displacement efficiency detection.
Further, carry out three according to the second nuclear magnetic resonance image and the 4th nuclear magnetic resonance image and adopt oil displacement efficiency detection bag
Include: obtain the oil mass of the second rock core according to the second nuclear magnetic resonance image；The 4th rock is obtained according to the 4th nuclear magnetic resonance image
The oil mass of the heart；And obtain three adopt oil displacement efficiency according to the oil mass of the second rock core and the oil mass of the 4th rock core.
Further, rock core to be measured is that oil field gathers rock core, before rock core to be measured is carried out dehydrogenation, the method
Also include: rock core to be measured is carried out pretreatment, wherein, pretreatment include following one or more: washing oil processes, washes
Salt treatment and drying and processing, wherein, carry out dehydrogenation to through pretreated rock core to be measured.
To achieve these goals, according to a further aspect in the invention, it is provided that a kind of oil displacement efficiency detection device.
Oil displacement efficiency detection device according to the present invention includes: dehydrogenation mechanism, for rock core to be measured is carried out dehydrogenation,
Obtain dehydrogenation rock core；And testing agency, for carrying out oil displacement efficiency detection based on dehydrogenation rock core.
By the present invention, use and rock core to be measured is carried out dehydrogenation, obtain dehydrogenation rock core；And based on dehydrogenation rock core
Carry out oil displacement efficiency detection, solve the accuracy analyzing oil displacement efficiency in correlation technique based on nmr imaging technique
Low problem, and then reached to improve the effect of the accuracy analyzing oil displacement efficiency.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of oil displacement efficiency detection method according to embodiments of the present invention；And
Fig. 2 is the schematic diagram of oil displacement efficiency detection device according to embodiments of the present invention.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order to make those skilled in the art be more fully understood that the application scheme, below in conjunction with in the embodiment of the present application
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present application, it is clear that described embodiment
It is only the embodiment of the application part rather than whole embodiments.Based on the embodiment in the application, ability
The every other embodiment that territory those of ordinary skill is obtained under not making creative work premise, all should belong to
The scope of the application protection.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that this
The data that sample uses can be exchanged in the appropriate case, in order to embodiments herein described herein.Additionally, term
" include " and " having " and their any deformation, it is intended that cover non-exclusive comprising, such as, comprise
The process of series of steps or unit, method, system, product or equipment are not necessarily limited to those steps clearly listed
Rapid or unit, but can include that the most clearly list or intrinsic for these processes, method, product or equipment
Other step or unit.
Embodiments providing a kind of oil displacement efficiency detection method, Fig. 1 is displacement of reservoir oil effect according to embodiments of the present invention
The really flow chart of detection method.
As it is shown in figure 1, this oil displacement efficiency detection method includes that steps S102 is to step S104:
Step S102: rock core to be measured is carried out dehydrogenation, obtains dehydrogenation rock core.
Rock core to be measured refers to the rock core for carrying out oil displacement efficiency analysis.In a practical situation, can gather from oil field
Rock core as rock core to be measured, can be analyzed and obtains the displacement of reservoir oil in whole oil field by analyzing the oil displacement efficiency of this rock core to be measured and imitate
Really, it is also possible to improve oil field oil extraction methods according to the oil displacement efficiency of this rock core to be measured under different oil extraction methods, thus can
To improve the oil displacement efficiency in oil field.When rock core to be measured is oil field collection rock core, rock core to be measured is being carried out dehydrogenation
Before, in addition it is also necessary to this rock core to be measured is carried out the pretreatment such as washing oil process, desalinization of soil by flooding or leaching process and drying and processing.When this is to be measured
When rock core is artificial rock core, directly rock core to be measured can be carried out dehydrogenation without above-mentioned preprocessing process.
Specifically, the proton in rock core can be detected by the embodiment of the present invention by nmr imaging technique, root
It is distributed according to the proton in rock core and can analyze the pore size of rock core, the distribution situation of hole and Fluid in Pore amount (example
As, oil and water distribution in hole) etc..And in practical situation, owing to the mineral of rock core generally also can contain protium,
Protium in the mineral of rock core can affect oil and the degree of accuracy of water distribution detection in rock core, therefore, enters rock core to be measured
Row dehydrogenation can avoid the protium contained in the mineral of rock core to be measured to detecting oil in rock core to be measured in subsequent process
Impact with the degree of accuracy of water distribution.For example, it is possible to remove to be measured by the method that rock core to be measured is carried out heat treated
The protium contained in the mineral of rock core.
Step S104: carry out oil displacement efficiency detection based on dehydrogenation rock core.
The embodiment of the present invention by carrying out dehydrogenation to rock core to be measured, thus avoids in rock core Minerals to be measured contained
Protium on the impact of the testing result of oil and water zonation in follow-up rock core to be measured, further increase oil displacement efficiency analysis
Accuracy, solve the low problem of accuracy analyzing oil displacement efficiency in correlation technique based on nmr imaging technique.
It is preferably based on dehydrogenation rock core to carry out oil displacement efficiency detection and include: use dehydrogenation simulated oil and simulated formation water to exist
Set up oil saturation and the water saturation of preset ratio in dehydrogenation rock core, obtain the first rock core；Obtain the first rock core
The first nuclear magnetic resonance image；First rock core is carried out displacement of reservoir oil process, obtains the second rock core；Obtain the of the second rock core
Two nuclear magnetic resonance images；And carry out oil displacement efficiency detection according to the first nuclear magnetic resonance image and the second nuclear magnetic resonance image.
In test in simulation oil field oil displacement process, it usually needs use the simulation for simulation oil field Central Plains oil properties
Oil, and dehydrogenation simulated oil refers to not contain in this simulated oil protium, thus detected by nmr imaging technique
Proton both be from water, such that it is able to effectively distinguish the You Heshui in rock core.Similarly, simulated formation water refers to
With the water that formation water has same or similar character.Set up in dehydrogenation rock core by dehydrogenation simulated oil and simulated formation water
The oil saturation of preset ratio and water saturation, such that it is able to the oil and water zonation of the rock core in simulation oil field.Dehydrogenation
Oil mass contained in rock core and the water yield can be configured according to practical situation, such that it is able to study different profit content
The oil displacement efficiency of rock core.
First rock core is the dehydrogenation rock core of oil saturation and the water saturation establishing preset ratio, by nuclear-magnetism altogether
The imaging technique that shakes can obtain the nuclear magnetic resonance image of the first rock core (the i.e. first nuclear magnetic resonance image).By this first core
Magnetic resonance image (MRI) can analyze the oil of the first rock core, water distribution.After obtaining the nuclear magnetic resonance image of the first rock core,
First rock core can be carried out displacement of reservoir oil process.The displacement of reservoir oil refers to gather the process of crude oil, conventional technology of reservoir sweep from oil field
Including water drive oil, three adopting the displacement of reservoir oil etc., wherein, water drive oil refers to by water filling in oil field to gather crude oil, and three adopt and drive
Oil refers to use various physics, chemical method to gather crude oil, such as, injects activated water or alkaline water to adopt in oil field
The crude oil of oil-collecting Tanaka.In practical situation, during the Crude Oil of exploitation oil field, first it is to utilize oil field Crude Oil
The energy acquisition crude oil of itself, but the efficiency comparison that this method gathers crude oil is low；Secondly utilize and inject in oil reservoir
The mode of water gathers crude oil, i.e. water drive oil further；It is finally to utilize various physics, chemical method to gather further
Remaining oil after water drive oil, i.e. three adopt the displacement of reservoir oil.
Above-mentioned second rock core is the rock core after the displacement of reservoir oil processes, and can obtain the second rock core by nmr imaging technique
Nuclear magnetic resonance image (the i.e. second nuclear magnetic resonance image), by this second nuclear magnetic resonance image can analyze the displacement of reservoir oil process
The oil of rock core afterwards, water distribution.Can obtain by comparing the first nuclear magnetic resonance image and the second nuclear magnetic resonance image
The parameters such as oil displacement efficiency.
Specifically, the first rock core is carried out displacement of reservoir oil process, obtain the second rock core and include: the first rock core is carried out water drive oil
Process, obtain the second rock core.The embodiment of the present invention carries out the displacement of reservoir oil first with water drive oil technology to the first rock core, and second
Rock core is the rock core to be measured after water drive oil terminates.NMR (Nuclear Magnetic Resonance)-imaging skill is utilized continuously during carrying out water drive oil
Art obtains the nuclear magnetic resonance image in water drive oil each stage, to present the distribution of water in rock core in real time.Second nuclear magnetic resonance, NMR
Image is the nuclear magnetic resonance image of above-mentioned second rock core obtained after water drive oil terminates, by comparing the nuclear-magnetism of the second rock core
The nuclear magnetic resonance image of resonance image and the first rock core i.e. can obtain the parameters such as oil-water displacement efficiency, by analyzing water drive oil
The nuclear magnetic resonance image in each stage can analyze during water drive oil the change procedure of the water yield in rock core to be measured.
Alternatively, the embodiment of the present invention is carrying out water drive oil process to the first rock core, after obtaining the second rock core, enters one
Oil displacement efficiency is adopted in step detection three.Specifically, the first rock core is being carried out water drive oil process, after obtaining the second rock core,
Continue that the second rock core is carried out three and adopt displacement of reservoir oil process, obtain the 4th rock core；Obtain the 4th nuclear magnetic resonance, NMR figure of the 4th rock core
Picture；And according to the second nuclear magnetic resonance image and the 4th nuclear magnetic resonance image carry out three adopt oil displacement efficiency detection.
As it has been described above, three adopt the displacement of reservoir oil and i.e. utilize physics, chemical method to gather oil field Crude Oil, such as, use polymer
The displacement of reservoir oil.Adopting three can utilize nmr imaging technique to obtain three cores adopting the displacement of reservoir oil each stage continuously in oil displacement process
Magnetic resonance image (MRI), to present the distribution of water in rock core to be measured in real time.4th rock core refers to that three adopt the rock core after the displacement of reservoir oil terminates,
4th nuclear magnetic resonance image is the nuclear magnetic resonance image of the 4th rock core, by analyze the 4th nuclear magnetic resonance image it is known that
Three adopt oil, water distribution in the rock core to be measured after the displacement of reservoir oil terminates.The second rock core obtained after being terminated by analysis water drive oil
Nuclear magnetic resonance image (the i.e. second nuclear magnetic resonance image) and three adopts the nuclear magnetic resonance, NMR of the 4th rock core obtained after the displacement of reservoir oil terminates
Image (the i.e. the 4th nuclear magnetic resonance image) i.e. can be analyzed three and adopt oil displacement efficiency, and such as, three adopt oil displacement efficiency, and three adopt
The Fuel Oil Remaining etc. of the displacement of reservoir oil, specifically, carries out three according to the second nuclear magnetic resonance image and the 4th nuclear magnetic resonance image and adopts and drive
Oil effect detection includes: obtain the oil mass of the second rock core according to the second nuclear magnetic resonance image；According to the 4th nuclear magnetic resonance, NMR figure
As obtaining the oil mass of the 4th rock core；And according to the oil mass of the second rock core and the oil mass of the 4th rock core obtain three adopt the displacement of reservoir oil effect
Rate.
Preferably, to use dehydrogenation simulated oil and simulated formation water to set up the oil-containing of preset ratio in dehydrogenation rock core saturated
Degree and water saturation, before obtaining the first rock core, this detection method also includes: dehydrogenation rock core is carried out saturation simulation
Formation water processes, and obtains the 3rd rock core；And the 3rd nuclear magnetic resonance image of acquisition the 3rd rock core, according to the first nuclear-magnetism
Resonance image and the second nuclear magnetic resonance image carry out oil displacement efficiency detection include: according to the first nuclear magnetic resonance image, second
Nuclear magnetic resonance image and the 3rd nuclear magnetic resonance image carry out oil displacement efficiency detection.
Dehydrogenation rock core carries out the process of saturation simulation formation water refer to be injected in dehydrogenation rock core until reaching simulated formation water
To saturation, the 3rd rock core refers to be saturated the dehydrogenation rock core of simulated formation water.After obtaining the 3rd rock core, logical
Cross nmr imaging technique and can obtain the nuclear magnetic resonance image (the i.e. the 3rd nuclear magnetic resonance image) of the 3rd rock core, due to
3rd rock core contains only simulated formation water, therefore, can obtain by analyzing the proton distribution of the 3rd nuclear magnetic resonance image
Pore size and distribution situation to above-mentioned rock core to be measured.
Preferably, before dehydrogenation rock core is carried out saturation simulation formation water process, method also includes: to dehydrogenation rock core
Carrying out evacuation process, wherein, the dehydrogenation rock core after processing evacuation carries out saturation simulation formation water process.
Owing to the hole of dehydrogenation rock core may be full of air, and containing protium in the water in air, by dehydrogenation
Rock core carries out evacuation process, removes the air in dehydrogenation rock core, and the protium in air can be avoided in subsequent process
On the oil in rock core to be measured, the impact of water distribution testing result, improve the degree of accuracy of oil displacement efficiency detection further.
Alternatively, carry out oil displacement efficiency detection according to the first nuclear magnetic resonance image and the second nuclear magnetic resonance image to include: root
The oil mass of the first rock core is obtained according to the first nuclear magnetic resonance image；The oil of the second rock core is obtained according to the second nuclear magnetic resonance image
Amount；And obtain oil displacement efficiency according to the oil mass of the first rock core and the oil mass of the second rock core.
Oil displacement efficiency detection can include in oil displacement efficiency, rock core to be measured in different aperture Remaining Oil Distribution etc., example
As, oil displacement efficiency can be obtained by com-parison and analysis the first nuclear magnetic resonance image and the second nuclear magnetic resonance image, specifically,
Oil and the respective volume of water in the first rock core can be obtained, according to the second nuclear magnetic resonance, NMR according to the first nuclear magnetic resonance image
Image can obtain oil and the respective volume of water in the second rock core, by volume oily in the first rock core and the second rock
The volume of oil i.e. can be calculated the oil displacement efficiency that the above-mentioned displacement of reservoir oil processes in the heart.
Illustrating the embodiment of the present invention as a example by polymer displacement of reservoir oil below, following steps S202 are to step S212:
Step S202: rock core is carried out washing oil, the desalinization of soil by flooding or leaching and drying and processing according to rock sample preprocess method.
Step S204: utilize heating means that rock core matrix minerals is carried out dehydrogenation.
Step S206: by rock core vacuumizing saturation simulation formation water, utilizes nmr imaging technique to measure rock core
Porosity.
Step S208: set up certain oil-containing in rock core by displacement mode dehydrogenation simulated oil and simulated formation water and satisfy
With degree and water saturation, and nmr imaging technique is utilized to present the distribution of formation water in rock core.
Step S210: carry out water drive oil, after water drive oil again with nmr imaging technique present water in rock core point
Cloth.
Step S212: carry out three and adopt the displacement of reservoir oil, period utilize continuously nmr imaging technique present proton in rock core point
Cloth change procedure.
Owing to rock core having carried out dehydrogenation, and the simulated oil used is dehydrogenation simulated oil so that whole process
In in the polymer that injects during only water component and three is adopted containing protium, rely on the nuclear magnetic resonance image of proton
It is water component or three and adopts the distributed image injecting hydrogeneous polymer, by the change observable of above-mentioned nuclear magnetic resonance image
The changes in distribution of remaining oil, and three can be calculated adopt the parameters such as oil displacement efficiency, and then adopt oil displacement efficiency to three and be evaluated.
As can be seen from the above description, present invention achieves following technique effect:
The embodiment of the present invention by carrying out dehydrogenation to rock core to be measured, thus avoids in rock core Minerals to be measured contained
Protium on the impact of the testing result of oil and water zonation in follow-up rock core to be measured, further increase oil displacement efficiency analysis
Accuracy, solve the low problem of accuracy analyzing oil displacement efficiency in correlation technique based on nmr imaging technique.
Additionally, due to have employed dehydrogenation simulated oil and rock core to be measured carried out evacuation process, therefore by contrasting each step
Water drive oil and three can be adopted the oil displacement efficiency parameter such as oil displacement efficiency, Remaining Oil Distribution and be carried out point by nuclear magnetic resonance image
Analysis detection, testing result good reliability and precision are high.
Another aspect according to embodiments of the present invention, it is provided that a kind of oil displacement efficiency detection device.Fig. 2 is according to this
The schematic diagram of the oil displacement efficiency detection device of bright embodiment.
As in figure 2 it is shown, this oil displacement efficiency detection device includes: dehydrogenation mechanism 10 and testing agency 20.
Dehydrogenation mechanism 10, for rock core to be measured is carried out dehydrogenation, obtains dehydrogenation rock core.
In practical situation, owing to the mineral of rock core generally also can contain protium, the protium meeting in the mineral of rock core
Affect oil and the degree of accuracy of water distribution detection in rock core, therefore, rock core to be measured is carried out dehydrogenation and can avoid to be measured
The protium contained in the mineral of rock core is to detecting the shadow of the degree of accuracy of oil and water distribution in rock core to be measured in subsequent process
Ring.For example, it is possible to remove, by the method that rock core to be measured is carried out heat treated, the hydrogen contained in the mineral of rock core to be measured
Element.
Testing agency 20, for carrying out oil displacement efficiency detection based on dehydrogenation rock core.
Specifically, testing agency 20 can include such as lower module: evacuation module, for taking out dehydrogenation rock core very
Vacancy is managed, saturation simulation formation water module, for dehydrogenation rock core being carried out saturation simulation formation water process, and displacement module,
For by displacement mode dehydrogenation simulated oil and simulated formation water set up in dehydrogenation rock core certain oil saturation and
Water saturation, water drive oil module, for dehydrogenation rock core carries out water drive oil process, and three adopt displacement of reservoir oil module, use
Adopting displacement of reservoir oil process, and NMR (Nuclear Magnetic Resonance)-imaging module in dehydrogenation rock core being carried out three, being used for obtaining dehydrogenation rock core at each
The nuclear magnetic resonance image in stage.
By the embodiment of the present invention, use dehydrogenation mechanism 10 that rock core to be measured is carried out dehydrogenation, obtain dehydrogenation rock core；
And use testing agency 20 to carry out oil displacement efficiency detection based on dehydrogenation rock core, solve in correlation technique and be total to based on nuclear-magnetism
The imaging technique that shakes analyzes the low problem of accuracy of oil displacement efficiency, and then has reached to improve the accuracy analyzing oil displacement efficiency
Effect.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. an oil displacement efficiency detection method, it is characterised in that including:
Rock core to be measured is carried out dehydrogenation, obtains dehydrogenation rock core；And
Oil displacement efficiency detection is carried out based on described dehydrogenation rock core.
Oil displacement efficiency detection method the most according to claim 1, it is characterised in that carry out based on described dehydrogenation rock core
Oil displacement efficiency detection includes:
Dehydrogenation simulated oil and simulated formation water is used to set up the oil saturation of preset ratio in described dehydrogenation rock core
And water saturation, obtain the first rock core；
Obtain the first nuclear magnetic resonance image of described first rock core；
Described first rock core is carried out displacement of reservoir oil process, obtains the second rock core；
Obtain the second nuclear magnetic resonance image of described second rock core；And
Oil displacement efficiency detection is carried out according to described first nuclear magnetic resonance image and described second nuclear magnetic resonance image.
Oil displacement efficiency detection method the most according to claim 2, it is characterised in that
The oil-containing setting up preset ratio in employing dehydrogenation simulated oil and simulated formation water in described dehydrogenation rock core is saturated
Degree and water saturation, before obtaining the first rock core, described method also includes:
Described dehydrogenation rock core is carried out saturation simulation formation water process, obtains the 3rd rock core；And
Obtain the 3rd nuclear magnetic resonance image of described 3rd rock core,
Oil displacement efficiency detection bag is carried out according to described first nuclear magnetic resonance image and described second nuclear magnetic resonance image
Include: according to described first nuclear magnetic resonance image, described second nuclear magnetic resonance image and described 3rd nuclear magnetic resonance, NMR figure
As carrying out oil displacement efficiency detection.
Oil displacement efficiency detection method the most according to claim 3, it is characterised in that described dehydrogenation rock core is being carried out
Before saturation simulation formation water processes, described method also includes: described dehydrogenation rock core is carried out evacuation process,
Wherein, the dehydrogenation rock core after processing evacuation carries out saturation simulation formation water process.
Oil displacement efficiency detection method the most according to claim 2, it is characterised in that according to described first nuclear magnetic resonance, NMR
Image and described second nuclear magnetic resonance image carry out oil displacement efficiency detection and include:
The oil mass of described first rock core is obtained according to described first nuclear magnetic resonance image；
The oil mass of described second rock core is obtained according to described second nuclear magnetic resonance image；And
Oil mass and the oil mass of described second rock core according to described first rock core obtain oil displacement efficiency.
Oil displacement efficiency detection method the most according to claim 2, it is characterised in that described first rock core is driven
Oil processing, obtains the second rock core and includes: described first rock core is carried out water drive oil process, obtains the second rock core.
Oil displacement efficiency detection method the most according to claim 6, it is characterised in that described first rock core is being carried out
Water drive oil processes, and after obtaining the second rock core, described method also includes:
Described second rock core is carried out three and adopts displacement of reservoir oil process, obtain the 4th rock core；
Obtain the 4th nuclear magnetic resonance image of described 4th rock core；And
Carry out three according to described second nuclear magnetic resonance image and described 4th nuclear magnetic resonance image and adopt oil displacement efficiency inspection
Survey.
Oil displacement efficiency detection method the most according to claim 7, it is characterised in that according to described second nuclear magnetic resonance, NMR
Image and described 4th nuclear magnetic resonance image carry out three adopt oil displacement efficiency detection include:
The oil mass of described second rock core is obtained according to described second nuclear magnetic resonance image；
The oil mass of described 4th rock core is obtained according to described 4th nuclear magnetic resonance image；And
Oil mass and the oil mass of described 4th rock core according to described second rock core obtain three and adopt oil displacement efficiency.
Oil displacement efficiency detection method the most according to claim 1, it is characterised in that described rock core to be measured is that oil field is adopted
Collection rock core, before rock core to be measured is carried out dehydrogenation, described method also includes:
Described rock core to be measured is carried out pretreatment, wherein, described pretreatment include following one or more: washing oil
Process, desalinization of soil by flooding or leaching process and drying and processing, wherein, go through described pretreated described rock core to be measured
Hydrogen processes.
10. an oil displacement efficiency detection device, it is characterised in that including:
Dehydrogenation mechanism, for rock core to be measured is carried out dehydrogenation, obtains dehydrogenation rock core；And
Testing agency, for carrying out oil displacement efficiency detection based on described dehydrogenation rock core.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444201A (en) * | 2018-05-25 | 2019-03-08 | 中国石油大学(华东) | A kind of nuclear magnetic resonance experiment device and method measuring multiphase fluidflow feature in compact rock core porous media |
| CN111855523A (en) * | 2019-04-26 | 2020-10-30 | 上海纽迈电子科技有限公司 | Analysis method of seepage experiment and application thereof |
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