CN108510111A - A kind of method and device of prediction annular space supercharging - Google Patents
A kind of method and device of prediction annular space supercharging Download PDFInfo
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Abstract
The embodiment of the present application provides a kind of method and device of prediction annular space supercharging, and this method includes：Temperature and pressure of the fluid under different depth in the annular space is obtained in real time；It is corresponding to determine the coefficient of expansion and the compressed coefficient of the fluid in annular space at different temperatures and pressures according to preset coefficient of expansion model and compressed coefficient model；The coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space supercharging prediction model, annular space supercharging is obtained.The embodiment of the present application can improve the accuracy of annular space supercharging prediction.
Description
Technical field
This application involves exploratory engineering of off-shore petroleum/gas reservoir development technique field, a kind of method more particularly, to prediction annular space supercharging and
Device.
Background technology
In recent years, in order to obtain the economic benefit of more petroleum resources, bigger, the exploration and development of offshore oil and gas field is gradual
As the emphasis of each oil company.At sea in drilling well, usually by the depth of water be more than 500m be known as deep well, such oil/gas well because
For the limitation of the factors such as marine environment, geological conditions, it is faced with great engineering challenge.
In deep well work progress, the cement mortar in annular space will not be returned to well head, to form one section in annular space
Not by the space of cement sealing.This section is one close not by the not no channel with external environment unicom of the annular space of sealing
Close space.The closed loop is filled with drilling fluid or completion fluid in the air, and these liquid can be heated to by production liquid in process of production
High temperature, to thermally expand.Because this section of annular space is a confined space, pressure can be increased accordingly, which is called ring
Sky supercharging or trapped pressure.
Annular space is pressurized the safety for seriously threatening casing, oil pipe, and there are many cases to show that annular space is pressurized meeting at present
It squeezes and ruins casing, oil pipe, cause great economic loss.Therefore, how Accurate Prediction annular space is pressurized, to assess the latent of the deep well
It is a technical problem to be solved urgently in risk.
Invention content
The embodiment of the present application is designed to provide a kind of method and device of prediction annular space supercharging, to improve annular space supercharging
The accuracy of prediction.
In order to achieve the above objectives, on the one hand, the embodiment of the present application provides a kind of method of prediction annular space supercharging, including：
Temperature and pressure of the fluid under different depth in the annular space is obtained in real time；
According to preset coefficient of expansion model and compressed coefficient model, the corresponding fluid determined in annular space in different temperatures and
The coefficient of expansion under pressure and the compressed coefficient；
The coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space supercharging prediction model, annular space supercharging is obtained.
In the method for the prediction annular space supercharging of the embodiment of the present application, the annular space supercharging prediction model includes：
Wherein, Δ P is pressurized for annular space, TiAnd PiTemperature and pressure of the fluid under i-th of depth respectively in annular space,
ΔTiFor TiIncrement, α (Ti,Pi) be annular space in fluid in TiAnd PiUnder the coefficient of expansion, k (Ti,Pi) be annular space in fluid
In TiAnd PiUnder the compressed coefficient.
It is described to be according to preset coefficient of expansion model and compression in the method for the prediction annular space supercharging of the embodiment of the present application
Exponential model corresponds to and determines the coefficient of expansion and the compressed coefficient of the fluid in annular space at different temperatures and pressures, including：
Relationship ρ=f (T, P) of the density and temperature, pressure of fluid is determined according to two-dimentional Lagrange's interpolation；
ρ=f (T, P) is substituted into formulaDetermine the fluid in annular space in different temperatures and pressure
The coefficient of expansion under power；And
ρ=f (T, P) is substituted into formulaDetermine the fluid in annular space in different temperatures and pressure
Under the compressed coefficient；
Wherein, α and k is respectively the coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space, and ρ=
F (T, P) indicates that the fluid density ρ in annular space is the function about temperature T and pressure P, and T is the fluid temperature (F.T.) in annular space, annular space
Interior Fluid pressure.
Wherein, α and k is respectively the coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space, and ρ is
Fluid density in annular space, T are the fluid temperature (F.T.) in annular space, the Fluid pressure in annular space.
In the method for the prediction annular space supercharging of the embodiment of the present application, the fluid obtained in real time in the annular space is in difference
Temperature under depth, including：
Obtain temperature of the fluid under different depth in the annular space in real time according to preset half steady-state model.
In the method for the prediction annular space supercharging of the embodiment of the present application, in the fluid obtained in real time in the annular space not
Before the temperature and pressure under depth, further include：
Verification processing is carried out to the coefficient of expansion model and the compressed coefficient model in advance.
On the other hand, the embodiment of the present application also provides a kind of devices of prediction annular space supercharging, including：
Temperature and pressure acquisition module, for obtaining temperature and pressure of the fluid in the annular space under different depth in real time；
Coefficient determination module, for according to preset coefficient of expansion model and compressed coefficient model, corresponding to and determining in annular space
The fluid coefficient of expansion and the compressed coefficient at different temperatures and pressures；
It is pressurized prediction module, the coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space supercharging prediction model,
Obtain annular space supercharging.
In the device of the prediction annular space supercharging of the embodiment of the present application, the annular space supercharging prediction model includes：
Wherein, Δ P is pressurized for annular space, TiAnd PiTemperature and pressure of the fluid under i-th of depth respectively in annular space,
ΔTiFor TiIncrement, α (Ti,Pi) be annular space in fluid in TiAnd PiUnder the coefficient of expansion, k (Ti,Pi) be annular space in fluid
In TiAnd PiUnder the compressed coefficient.
It is described to be according to preset coefficient of expansion model and compression in the device of the prediction annular space supercharging of the embodiment of the present application
Exponential model corresponds to and determines the coefficient of expansion and the compressed coefficient of the fluid in annular space at different temperatures and pressures, including：
Relationship ρ=f (T, P) of the density and temperature, pressure of fluid is determined according to two-dimentional Lagrange's interpolation；
ρ=f (T, P) is substituted into formulaDetermine the fluid in annular space in different temperatures and pressure
The coefficient of expansion under power；And
ρ=f (T, P) is substituted into formulaDetermine the fluid in annular space in different temperatures and pressure
Under the compressed coefficient；
Wherein, α and k is respectively the coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space, and ρ=
F (T, P) indicates that the fluid density ρ in annular space is the function about temperature T and pressure P, and T is the fluid temperature (F.T.) in annular space, annular space
Interior Fluid pressure.
Wherein, α and k is respectively the coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space, and ρ is
Fluid density in annular space, T are the fluid temperature (F.T.) in annular space, the Fluid pressure in annular space.
In the device of the prediction annular space supercharging of the embodiment of the present application, the fluid obtained in real time in the annular space is in difference
Temperature under depth, including：
Obtain temperature of the fluid under different depth in the annular space in real time according to preset half steady-state model.
In the device of the prediction annular space supercharging of the embodiment of the present application, which further includes：
Coefficient authentication module, for being carried out at verification to the coefficient of expansion model and the compressed coefficient model in advance
Reason.
By the above technical solution provided by the embodiments of the present application as it can be seen that obtaining the annular space in real time in the embodiment of the present application
Interior fluid is right first according to preset coefficient of expansion model and compressed coefficient model after the temperature and pressure under different depth
The coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space should be determined, on this basis by the swollen of acquisition
Swollen coefficient and the compressed coefficient substitute into preset annular space supercharging prediction model, to obtain annular space supercharging.It can be seen that the application
The variation of the coefficient of expansion and the compressed coefficient with temperature and pressure is considered in embodiment, thus, it compared with the existing technology will be swollen
The coefficient of expansion and the compressed coefficient more objective that swollen coefficient and the compressed coefficient are obtained as definite value, the embodiment of the present application, because
This embodiment of the present application can get more accurate annular space supercharging.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.In the accompanying drawings：
Fig. 1 is the flow chart of the method for prediction annular space supercharging in one embodiment of the application；
Fig. 2 is the structure diagram of the device of prediction annular space supercharging in one embodiment of the application；
Fig. 3 is the structure diagram of the device of prediction annular space supercharging in another embodiment of the application.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The every other embodiment that technical staff is obtained without creative efforts should all belong to the application protection
Range.Such as in being described below, second component is formed above the first component, may include the first component and second component
The embodiment formed in a manner of being in direct contact can also include the first component and second component in a manner of non-direct contact (i.e. the
Can also include additional component between one component and second component) embodiment etc. that is formed.
Moreover, for ease of description, some embodiments of the application can use such as " in ... top ", " ... under ",
The spatially relative terms such as " top ", " lower section ", with description such as each element shown in the drawings of embodiment or component and another
Relationship between (or other) element or component.It should be understood that other than the orientation described in attached drawing, space is opposite
Term, which also aims to, includes the different direction of device in use or operation.If such as the device in attached drawing is reversed, and is described
For the element or component of " " other elements or component " below " or " under ", it will then be positioned as " " other elements or portion
Part " top " or " on ".
In true annular space, in annular space temperature be likely to be breached 200 DEG C it is even higher, pressure is likely to be breached tens MPa even
Higher.In such circumstances, how the supercharging of Accurate Prediction annular space is very intractable technical problem.And in the process for realizing the application
In, present inventor has found by research：
It is most of that (see following equation 1) is realized using following classical prediction model for the prediction of annular space supercharging
Δ P=(α/k) Δ T (1)
Δ T-is fluid temperature variations amount, degree Celsius；
Δ P-change in fluid pressure amount, MPa；
α-the coefficient of cubical expansion；
K-coefficient of bulk compressibility；
However, practice have shown that, the accuracy of above-mentioned classics prediction model annular space supercharging prediction is not high.Present invention
People, which studies, to be found：The reason for causing the annular space supercharging forecasting accuracy of above-mentioned classical prediction model not high essentially consists in, the prediction
Model thinks the coefficient of expansion of fluid and the compressed coefficient is constant, the temperature and pressure non-linear relation without considering fluid；And
The reason of generating the non-linear relation is that thermal expansion coefficient and the compressed coefficient change with the variation of temperature, pressure.Also,
Also can obtain the coefficient of expansion of fluid and compression under high temperature, condition of high voltage without a kind of feasible method in engineering at present is
Number.
To solve the above problems, by studying for a long period of time, the density that according to two-dimentional lagrange-interpolation, can establish water is closed
The function of the coefficient of expansion and the compressed coefficient about temperature, pressure is derived in the functional relation of temperature and pressure, then by density
Relationship, to which the coefficient of expansion model under different temperatures, pressure and compressed coefficient model can be obtained according to this computation model.
It, can be by new annular space prediction model, and according to new coefficient of expansion model and compressed coefficient model, new annular space on the basis of this
Prediction model come predict annular space be pressurized.In the embodiment of the present application, new coefficient of expansion model, new compressed coefficient model and new
Annular space prediction model will pre-establish, specific as follows：
New coefficient of expansion model and compressed coefficient model are built in advance：
Method for building up is as follows：First, by two-dimentional Lagrange interpolation formula, fluid density and temperature, pressure are obtained
Functional relation, interpolation formula are as follows with interpolation point：
ρ(Ti,Pt) it is in TiAnd PtUnder density, li(T) and l 't(P) it is basic function.
Specific interpolation point can be as shown in table 1：
The density of water under 1 different temperatures of table, pressure
As a result, according to formula 2, the density of water can be obtained about temperature, the functional relation of pressure.
Wherein, wherein α and k is respectively the coefficient of expansion of fluid at different temperatures and pressures and compression system in annular space
Number, ρ are the fluid density in annular space, and T is the fluid temperature (F.T.) in annular space, the Fluid pressure in annular space.
It brings formula 2 into formula 5 and 6, the coefficient of expansion model under water different temperatures, pressure and compressed coefficient mould can be obtained
Type.
Structure improves annular space prediction model in advance：
Wherein, Δ P is pressurized for annular space, TiAnd PiTemperature and pressure of the fluid under i-th of depth respectively in annular space,
ΔTiFor TiIncrement, α (Ti,Pi) be annular space in fluid in TiAnd PiUnder the coefficient of expansion, k (Ti,Pi) be annular space in fluid
In TiAnd PiUnder the compressed coefficient.
Refering to what is shown in Fig. 1, being based on above-mentioned principle, the embodiment of the present application may comprise steps of：
S101, temperature and pressure of the fluid under different depth in the annular space is obtained in real time.
In general, the fluid temperature (F.T.) in annular space increases with depth and is increased, so needing accurate prediction loop aerial each deep
The temperature of degree.In the application some embodiments, to improve the accuracy of prediction, a time step can be set, is then used pre-
If half steady-state model predict that the annular space Temperature Distribution of the time step (obtains the fluid in the annular space in difference in real time in real time
Temperature under depth).Since this half steady-state model can calculate the temperature and pressure of certain depth according to corresponding casing programme,
Thus there is higher accuracy.And in the application some embodiments, pressure of the fluid under different depth in annular space can
It calculates to obtain by fluid pressure.
In the application some embodiments, half above-mentioned steady-state model specifically refers to half steady temperature prediction theory：In temperature
Degree assumes that wellbore heat is divided into two parts in calculating：Oily tube fluid to cement sheath and bed boundary is stable state；Cement sheath and
It is unstable state that bed boundary conducts heat to stratum.
According to half Steady-state Theory, the prediction model of oil pipe fluid temperature (F.T.) is following formula：
M-geothermal gradient, DEG C/m
TfFluid temperature (F.T.) in-oil pipe, is opened；
Te- this at formation temperature, open, Te=Tr-mz；
W-production fluid mass flow, kg/s；
Z-calculating point coordinates；
G-acceleration of gravity, m/s2；
Cp- production fluid specific heat capacity, J/ (Kg*K)；
To- this section bottom hole temperature (BHT), is opened；
Tr- this section downhole formation temperature, is opened；
The determination of correlation computations parameter：
LRIt is the calculating parameter obtained by half steady method
Ufe is the heat transfer coefficient of the unit length infinitesimal section；
The convection transfer rate of h-tube inner wall；
K-thermal coefficient, W/ (m*K)；
Subscript：T-oil pipe, a-annular space, c-casing, Cem-- cement sheaths；
TD is zero dimension formation temperature, it is related with the zero dimension production time；
TD-zero dimension production time, tD=t αe/rw 2；
T-production time, s；
αe- stratum thermal diffusion coefficient, m2/s；
Rw-borehole size, m；
-- it is the calculating parameter for containing kinetic energy term and Joule-Thomson coefficient (J--T), when producing liquid difference, meter
Calculation method is also different；
According to half Steady-state Theory, the fluid temperature (F.T.) in annular space is predicted as following formula：
TA- annular space temperature, is opened；
M-micro- section of annulus fluid the quality, kg；
CpA- annular fluid specific heat capacity, J/ (Kg*K)；
UAt- from oil pipe fluid to the heat transfer coefficient of the micro- section of annular space A；
UAe- from annular space to the heat transfer coefficient on cement sheath boundary.
S102, according to preset coefficient of expansion model and compressed coefficient model, the corresponding fluid determined in annular space is in difference
The coefficient of expansion under temperature and pressure and the compressed coefficient.
It, can be according to being corresponded to respectively according to preset swollen according to above-mentioned formula (5) and (6) in the application some embodiments
Swollen Modulus Model and compressed coefficient model, it is corresponding to determine the coefficient of expansion at different temperatures and pressures of the fluid in annular space and pressure
Contracting coefficient.Wherein, the different temperatures and pressure may include the temperature and pressure referred under different depth.
S103, the coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space supercharging prediction model, obtains annular space
Supercharging.
In the application some embodiments, the coefficient of expansion of acquisition and the compressed coefficient can be substituted into above-mentioned formula (7) come it is pre-
Survey annular space supercharging.For Accurate Prediction, need to know that each calculating walks corresponding annular space temperature and pressure, thus the application some
The method that iteration can be used in embodiment, step by step calculation each calculate the annular space supercharging of step, then add up, you can obtain final annular space
Supercharging value.
In the application other embodiments, in order to ensure the above-mentioned new coefficient of expansion model pre-established and new pressure
The accuracy of contracting Modulus Model can be first in advance to the coefficient of expansion model and the compressed coefficient mould before applied to engineering
Type carries out verification processing.In one exemplary embodiment, verification method can be as follows：Confined space is provided with the method for laboratory experiment
The temperature of interior fluid, pressure dependence, obtain experimental data；Use new coefficient of expansion model and new compressed coefficient model prediction
Temperature, pressure dependence in the experiment, obtain prediction data；Comparative experiments data and prediction data, if relative error is less than pre-
If being worth (such as 5%, 10% etc.), then show that new coefficient of expansion model and new compressed coefficient model have engineer application valence
Value.In the embodiment of the present application, it is found by actual verification, the embodiment of the present application establishes new coefficient of expansion model and new pressure
Contracting Modulus Model meets preset requirement, can be applied to Practical Project.
It can be seen that obtaining the fluid in the annular space in real time after the temperature and pressure under different depth, first basis
Preset coefficient of expansion model and compressed coefficient model, it is corresponding to determine the expansion of the fluid in annular space at different temperatures and pressures
The coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space on this basis and are pressurized prediction model by coefficient and the compressed coefficient
In, to obtain annular space supercharging.As it can be seen that considering the coefficient of expansion and the compressed coefficient in the embodiment of the present application with temperature and pressure
Variation, thus, the expansion for compared with the existing technology obtaining the coefficient of expansion and the compressed coefficient as definite value, the embodiment of the present application
Coefficient and the compressed coefficient more objective, therefore the embodiment of the present application can get more accurate annular space supercharging.
Refering to what is shown in Fig. 2, a kind of device of prediction annular space supercharging of the embodiment of the present application may include that computer storage is situated between
Matter, is stored thereon with computer program, and the computer program realizes following steps when being executed by processor：
Temperature and pressure of the fluid under different depth in the annular space is obtained in real time；
According to preset coefficient of expansion model and compressed coefficient model, the corresponding fluid determined in annular space in different temperatures and
The coefficient of expansion under pressure and the compressed coefficient；
The coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space supercharging prediction model, annular space supercharging is obtained.
Although procedures described above flow includes the multiple operations occurred with particular order, it should however be appreciated that understand,
These processes may include more or fewer operations, these operations can be executed sequentially or be executed parallel (such as using parallel
Processor or multi-thread environment).
Refering to what is shown in Fig. 3, a kind of device of prediction annular space supercharging of the embodiment of the present application may include：
Temperature and pressure acquisition module 31 can be used for obtaining temperature and pressure of the fluid in the annular space under different depth in real time
Power；
Coefficient determination module 32 can be used for according to preset coefficient of expansion model and compressed coefficient model, corresponding to determine
The coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space；
It is pressurized prediction module 33, the coefficient of expansion of acquisition and the compressed coefficient can be substituted into preset annular space supercharging prediction mould
In type, annular space supercharging is obtained.
In the application other embodiments, the device of prediction annular space supercharging shown in Fig. 3 can also include that coefficient is verified
Module 34 can be used for carrying out verification processing to the coefficient of expansion model and the compressed coefficient model in advance.
For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each unit is realized can in the same or multiple software and or hardware when application.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology realizes information storage.Information can be computer-readable instruction, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storages, magnetic tape cassette, tape magnetic disk storage or other magnetic storage apparatus
Or any other non-transmission medium, it can be used for storage and can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as data-signal and carrier wave of modulation.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
But also include not having including so that process, method or equipment including a series of elements include not only those elements
There is the other element being expressly recited, or further includes for this process, method or the intrinsic element of equipment.Do not having more
In the case of more limitations, the element that is limited by sentence "including a ...", it is not excluded that in the process including the element, side
There is also other identical elements in method or equipment.
It will be understood by those skilled in the art that embodiments herein can be provided as method, system or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application
Form.It is deposited moreover, the application can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The application can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Usually, program module includes routines performing specific tasks or implementing specific abstract data types, program, object, group
Part, data structure etc..The application can also be put into practice in a distributed computing environment, in these distributed computing environments, by
Task is executed by the connected remote processing devices of communication network.In a distributed computing environment, program module can be with
In the local and remote computer storage media including storage device.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so description is fairly simple, related place is referring to embodiment of the method
Part explanation.
Above is only an example of the present application, it is not intended to limit this application.For those skilled in the art
For, the application can have various modifications and variations.It is all within spirit herein and principle made by any modification, equivalent
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (10)
1. a kind of method of prediction annular space supercharging, which is characterized in that including：
Temperature and pressure of the fluid under different depth in the annular space is obtained in real time；
According to preset coefficient of expansion model and compressed coefficient model, the corresponding fluid determined in annular space is in different temperatures and pressure
Under the coefficient of expansion and the compressed coefficient；
The coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space supercharging prediction model, annular space supercharging is obtained.
2. the method for prediction annular space supercharging as described in claim 1, which is characterized in that the annular space is pressurized prediction model packet
It includes：
Wherein, Δ P is pressurized for annular space, TiAnd PiTemperature and pressure of the fluid under i-th of depth respectively in annular space, Δ Ti
For TiIncrement, α (Ti,Pi) be annular space in fluid in TiAnd PiUnder the coefficient of expansion, k (Ti,Pi) be annular space in fluid in Ti
And PiUnder the compressed coefficient.
3. the method for prediction annular space supercharging as described in claim 1, which is characterized in that described according to preset coefficient of expansion mould
Type and compressed coefficient model, it is corresponding to determine the coefficient of expansion and the compressed coefficient of the fluid in annular space at different temperatures and pressures,
Including：
Relationship ρ=f (T, P) of the density and temperature, pressure of fluid is determined according to two-dimentional Lagrange's interpolation；
ρ=f (T, P) is substituted into formulaDetermine fluid in annular space at different temperatures and pressures
The coefficient of expansion；And
ρ=f (T, P) is substituted into formulaDetermine fluid in annular space at different temperatures and pressures
The compressed coefficient；
Wherein, α and k is respectively the coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space, ρ=f (T,
P) indicate that the fluid density ρ in annular space is function about temperature T and pressure P, T is the fluid temperature (F.T.) in annular space, in annular space
Fluid pressure.
4. the method for prediction annular space supercharging as described in claim 1, which is characterized in that described to obtain in real time in the annular space
Temperature of the fluid under different depth, including：
Obtain temperature of the fluid under different depth in the annular space in real time according to preset half steady-state model.
5. the method for prediction annular space supercharging as described in claim 1, which is characterized in that further include：
Verification processing is carried out to the coefficient of expansion model and the compressed coefficient model in advance.
6. a kind of device of prediction annular space supercharging, which is characterized in that including：
Temperature and pressure acquisition module, for obtaining temperature and pressure of the fluid in the annular space under different depth in real time；
Coefficient determination module, for according to preset coefficient of expansion model and compressed coefficient model, the corresponding stream determined in annular space
The coefficient of expansion and the compressed coefficient of body at different temperatures and pressures；
It is pressurized prediction module, the coefficient of expansion of acquisition and the compressed coefficient are substituted into preset annular space supercharging prediction model, obtained
Annular space is pressurized.
7. the device of prediction annular space supercharging as claimed in claim 6, which is characterized in that the annular space is pressurized prediction model packet
It includes：
Wherein, Δ P is pressurized for annular space, TiAnd PiTemperature and pressure of the fluid under i-th of depth respectively in annular space, Δ Ti
For TiIncrement, α (Ti,Pi) be annular space in fluid in TiAnd PiUnder the coefficient of expansion, k (Ti,Pi) be annular space in fluid in Ti
And piUnder the compressed coefficient.
8. the device of prediction annular space supercharging as claimed in claim 6, which is characterized in that described according to preset coefficient of expansion mould
Type and compressed coefficient model, it is corresponding to determine the coefficient of expansion and the compressed coefficient of the fluid in annular space at different temperatures and pressures,
Including：
Relationship ρ=f (T, P) of the density and temperature, pressure of fluid is determined according to two-dimentional Lagrange's interpolation；
ρ=f (T, P) is substituted into formulaDetermine fluid in annular space at different temperatures and pressures
The coefficient of expansion；And
ρ=f (T, P) is substituted into formulaDetermine fluid in annular space at different temperatures and pressures
The compressed coefficient；
Wherein, α and k is respectively the coefficient of expansion and the compressed coefficient of fluid at different temperatures and pressures in annular space, ρ=f (T,
P) indicate that the fluid density ρ in annular space is function about temperature T and pressure P, T is the fluid temperature (F.T.) in annular space, in annular space
Fluid pressure.
9. the device of prediction annular space supercharging as claimed in claim 6, which is characterized in that described to obtain in real time in the annular space
Temperature of the fluid under different depth, including：
Obtain temperature of the fluid under different depth in the annular space in real time according to preset half steady-state model.
10. the device of prediction annular space supercharging as claimed in claim 6, which is characterized in that the device further includes：
Coefficient authentication module, for carrying out verification processing to the coefficient of expansion model and the compressed coefficient model in advance.
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