CN109723970A - The Monitoring and management system and method that gas hydrate slurry body transports - Google Patents
The Monitoring and management system and method that gas hydrate slurry body transports Download PDFInfo
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- CN109723970A CN109723970A CN201910006364.3A CN201910006364A CN109723970A CN 109723970 A CN109723970 A CN 109723970A CN 201910006364 A CN201910006364 A CN 201910006364A CN 109723970 A CN109723970 A CN 109723970A
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- 239000002002 slurry Substances 0.000 title claims abstract description 215
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 188
- 230000032258 transport Effects 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 238000004088 simulation Methods 0.000 claims abstract description 26
- 150000004677 hydrates Chemical class 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000011156 evaluation Methods 0.000 claims abstract description 8
- 238000007726 management method Methods 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 35
- 230000009466 transformation Effects 0.000 claims description 35
- 239000012530 fluid Substances 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 24
- 239000013535 sea water Substances 0.000 claims description 22
- 238000000354 decomposition reaction Methods 0.000 claims description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 19
- 238000012546 transfer Methods 0.000 claims description 18
- 230000002776 aggregation Effects 0.000 claims description 17
- 238000004220 aggregation Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005553 drilling Methods 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 10
- 230000007306 turnover Effects 0.000 claims description 9
- 239000003345 natural gas Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010904 focused beam reflectance measurement Methods 0.000 description 2
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- 238000009792 diffusion process Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
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Abstract
The invention discloses a kind of Monitoring and management system that gas hydrate slurry body transports and method, module is established the system comprises first, the first computing module, test module, the first acquisition module, second module, the second computing module, judgment module, third is established and establishes module, steady-state simulation module and monitoring and management module.The present invention adapts to the diversification of gas hydrates type, the requirement of intellectual management, safety evaluation and running optimizatin to transport provide decision information, the problem of generating gas hydrates in the development process of marine oil and gas in pipeline and lead to line clogging can not only be alleviated, and flowing and the Phase-change Problems of gas hydrate slurry body are can solve, deepwater field low cost development is realized, the building of new energy industrial structure has been pushed.
Description
Technical field
The present invention relates to a kind of Monitoring and management system that gas hydrate slurry body transports and methods, belong to steady-state simulation
Technical field.
Background technique
Gas hydrates (Natural Gas Hydrate, abbreviation NGH) are also known as combustible ice, and one cubic metre of combustible ice can
It is converted into 164 cubic metres of natural gas and 0.8 cubic metre of water.Gas hydrates not only have easy to use, fuel value is high,
The characteristics of cleanliness without any pollution, and be conducive to transport and store, it is a kind of important potential resource.Member of Chinese Academy of Engineering father-in-law's history
Strong to point out in world energy sources trend forum: after the year two thousand fifty, four big energy substitution directions, gas hydrates row will occur in the whole world
Second.The R and D of gas hydrates are imperative.Meanwhile as the exploitation of marine oil and gas deepens continuously,
The problem of generating hydrate in multiphase pipeline and leading to line clogging is increasingly taken seriously.Traditional prevents hydrate from generating
Technology, such as keep the temperature, injection methanol, inhibitor etc., to move on to the balance phase line of hydrate in advantageous boundary, but because of application
Condition and high cost are limited, and the exploitation of deepwater field is difficult to apply to.Therefore, the flowing of researching natural gas hydrate slurry with
Phase-change characteristic, which just becomes, solves the formation speed of hydrate is slow, and the hydrate of formation is a large amount of with water, and NGH pipeline drag reduction conveys etc.
Problem realizes deepwater field low cost development, is the strategic requirement for constructing new energy industrial structure.Many foreign organization are
Through being studied balancing each other in the presence of hydrate and hydrate generation theorem, new pipeline water is prevented to develop
The method for closing object blocking.Hydrate is exactly dispersed in shape in multiphase flow by one of new substitute technology in the form of solid particle
It is conveyed at slurries.Currently, the explanation to the problem is: when boring chance deep-sea oil gas or natural gas hydrate is hidden, being produced in reservoir
Natural gas out enters the biphase gas and liquid flow to be thickened after pit shaft by single-phase flow；Cryogenic high pressure environment in pit shaft can also promote
Portion of natural gas forms gas hydrates, and hydrate swims in air liquid interface, just becomes flowable slurry.But work as slurry
When gas hydrate on drilling fluid with returning, if the environment temperature in pipe deviates its formation zone, hydrate particle will be decomposed
Release methane gas.Rapidly release, the diffusion of natural gas cause the separate phase flow rate for flowing through pipeline than cutting with pipe shared by split-phase
Section does not change for face ratio, two-phase interface, causes change and the vortex of multiphase flow flow regime；Meanwhile slurry hydrate in pit shaft or
Aggregation can also make annular space pipeline block in pipeline, to submarine pipeline conveying and drilling technology, well control, marine riser design etc.
Bring new harm.
Summary of the invention
The purpose of the present invention is to solve the defect of the above-mentioned prior art, a kind of accuracy of judgement, assessment are provided timely
The Monitoring and management system that gas hydrate slurry body transports, the system adapt to the diversification of gas hydrates type, management
Intelligentized requirement provides decision information for the safety evaluation transported and running optimizatin, can not only alleviate opening for marine oil and gas
The problem of generating gas hydrates in pipeline during hair and leading to line clogging, and can solve gas hydrate slurry
The flowing of body and Phase-change Problems realize deepwater field low cost development, have pushed the building of new energy industrial structure.
Another object of the present invention is to provide a kind of monitorings and management method that gas hydrate slurry body transports.
The purpose of the present invention can be reached by adopting the following technical scheme that:
The Monitoring and management system that gas hydrate slurry body transports, the system comprises:
First establishes module, for establishing seawater and subsea strata model；
First computing module, for calculating subsea strata unsteady-state heat transfer numerical value；
Test module, for testing the viscosity of gas hydrates slurry；
First obtains module, for obtaining gas hydrates on the basis of the viscosity test of gas hydrate slurry body
The Flowing characteristic parameters of slurry；
Second establishes module, for according to seawater and subsea strata model, subsea strata unsteady-state heat transfer numerical value and day
The Flowing characteristic parameters of right gas hydrate slurry, establish the multiphase flow flow model of the gas hydrate slurry body containing phase transformation；
Second computing module, for calculating the parameter that balances each other of gas hydrate slurry body；
Judgment module, for multiphase flow flow model and the natural gas hydration according to the gas hydrate slurry body containing phase transformation
The parameter that balances each other of object slurry analyzes flowing and the phase-change characteristic of gas hydrate slurry body, to judge gas hydrates
The manifold and turnover condition of slurry flowing, determine the constraint position and key influence factor that gas hydrate slurry body transports；
Third establishes module, for according to gas hydrate slurry body flowing and phase-change characteristic, establish natural gas hydration
Particle aggregation and decomposition model in object slurry；
Steady-state simulation module, constraint position and key influence factor for being transported according to gas hydrate slurry body, with
And particle aggregation and decomposition model in gas hydrate slurry body, realize the process compatible that gas hydrate slurry body transports；
Monitoring and management module, constraint position and key influence factor for being transported according to gas hydrate slurry body,
Realize the safety prediction to gas hydrate slurry body transport process and evaluation.
Further, it described first establishes in module, seawater and subsea strata model include ocean temperature equation, seawater stream
The calculating of fast equation and convective heat-transfer coefficient.
Further, in the test module, the viscosity of test gas hydrates slurry includes:
Prepare the gas hydrate slurry body under the conditions of different pressures, temperature；
Flow velocity-drop test is carried out to the fluid of the gas hydrate slurry body of various concentration；
Test experiments are carried out to the viscosity of the gas hydrate slurry body of various concentration, to characterize flow behavior index.
Further, it described first obtains in module, the Flowing characteristic parameters for obtaining gas hydrate slurry body include:
Select the flow theory of gas hydrate slurry body；
Four kinds of fluid modes and its corresponding constitutive equation are established, and calculates tube friction；Wherein, four kinds of fluids
Mode is respectively Newtonian fluid mode, Bingham fluid mode, pseudoplastic fluid bulk-mode and Casson fluid mode；
Semiempirical correlation, fluid viscosity calculating formula and the shear rate equation of regions of turbulent flow are corrected, gas water is obtained
Close the Flowing characteristic parameters of object slurry.
Further, it described second establishes in module, establishes the multiphase flow flowing of the gas hydrate slurry body containing phase transformation
Model includes:
For the flow process of the gas hydrate slurry body containing phase transformation, subsidiary equation is established, is kept in conjunction with basic mass-energy
The intrinsic kinetics model that permanent equation, circulating bed communication theory and hydrate generate establishes the gas hydrates containing phase transformation
The multiphase flow flow model of slurry.
Further, in second computing module, the parameter that balances each other for calculating gas hydrate slurry body includes:
Hydrate phasor, the specific heat, thermal coefficient, the heat of transformation, congruent melting point obtained using differential scanning calorimeter；
It balances each other and hydrone infiltration, adsorption theory from thermodynamics, establishes the accounting equation of Phase Equilibrium Temperature；
It is combined by specific experiment with calculating, determines phase transition temperature, the specific heat, thermal coefficient of gas hydrate slurry body
And concentration.
Further, in the judgment module, flowing and the phase-change characteristic of gas hydrate slurry body are analyzed, to judge
Gas hydrate slurry body flowing manifold and turnover condition include:
The correlation of formation, hydrate particle/drop mean chord, gas consumption and manifold that Taylor is steeped
It is analyzed；
Numerical simulation and experiment is combined, the multiphase flow flow model of the gas hydrate slurry body containing phase transformation is verified, obtains
Manifold to the gas hydrate slurry body containing phase transformation is shifted to new management mechanisms.
Further, the steady-state simulation module includes gateway unit, stratomere annular space pipe unit, stratomere drilling rod list
Member, water proof pipeline section annulus line unit and water proof pipeline section drilling rod unit, are able to carry out the dynamic that gas hydrate slurry body transports
Simulation, and the pressure in annulus line, temperature signal are transmitted in real time.
Further, the monitoring is also used to monitor steady-state simulation module each unit under default working condition with management module
Stream flowrates, composition and property, the Temperature and pressure distribution situation of outlet.
Another object of the present invention can be reached by adopting the following technical scheme that:
The monitoring and management method that gas hydrate slurry body transports, which comprises
Establish seawater and subsea strata model；
Calculate subsea strata unsteady-state heat transfer numerical value；
Test the viscosity of gas hydrates slurry；
On the basis of the viscosity test of gas hydrate slurry body, the flow behavior ginseng of gas hydrate slurry body is obtained
Number；
According to the stream of seawater and subsea strata model, subsea strata unsteady-state heat transfer numerical value and gas hydrate slurry body
Dynamic performance parameters establish the multiphase flow flow model of the gas hydrate slurry body containing phase transformation；
Calculate the parameter that balances each other of gas hydrate slurry body；
Multiphase flow flow model according to the gas hydrate slurry body containing phase transformation is equal with gas hydrate slurry body
Weigh parameter, analyzes flowing and the phase-change characteristic of gas hydrate slurry body, to judge the stream of gas hydrate slurry body flowing
Shape and turnover condition, determine the constraint position and key influence factor that gas hydrate slurry body transports；
According to the flowing of gas hydrate slurry body and phase-change characteristic, establish in gas hydrate slurry body particle aggregation with
Decomposition model；
The constraint position and key influence factor that are transported according to gas hydrate slurry body and gas hydrate slurry body
Middle particle aggregation and decomposition model realize the process compatible that gas hydrate slurry body transports；
The constraint position transported according to gas hydrate slurry body and key influence factor are realized to gas hydrate slurry
The safety prediction of body transport process and evaluation.
The present invention have compared with the existing technology it is following the utility model has the advantages that
1, the present invention is disclosed gas hydrate slurry body and is existed by the parameter that balances each other of calculating gas hydrate slurry body
The condition that phase change conditions and gas hydrates in annular space transport system are decomposed in drilling fluid, polymerize, considerably increases
The reliability of whole system.
2, the present invention can be according to seawater and subsea strata model, subsea strata unsteady-state heat transfer numerical value and gas water
The Flowing characteristic parameters of object slurry are closed, the multiphase flow flow model of the gas hydrate slurry body containing phase transformation is established, and were used
The advanced system of journey engineering has been able to carry out and has transported overall process steady-state simulation and running optimizatin, realizes accurately and timely monitoring point
Analysis and industrial management.
Detailed description of the invention
Fig. 1 is the Monitoring and management system schematic diagram that the gas hydrate slurry body of the embodiment of the present invention 1 transports.
Fig. 2 a is the decomposition region schematic diagram for the gas hydrate slurry body that the concentration of the embodiment of the present invention 1 is 1%.
Fig. 2 b is the decomposition region schematic diagram for the gas hydrate slurry body that the concentration of the embodiment of the present invention 1 is 5%.
Fig. 2 c is the decomposition region schematic diagram for the gas hydrate slurry body that the concentration of the embodiment of the present invention 1 is 10%.
Fig. 2 d is the decomposition region schematic diagram for the gas hydrate slurry body that the concentration of the embodiment of the present invention 1 is 15%.
Fig. 3 is the monitoring and management method flow chart that the gas hydrate slurry body of the embodiment of the present invention 2 transports.
Wherein, 1- first establishes module, the first computing module of 2-, 3- test module, and 4- first obtains module, and 5- second is built
Formwork erection block, the second computing module of 6-, 7- judgment module, 8- third establish module, 9- steady-state simulation module, 10- monitoring and management
Module.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment 1:
Present embodiments provide a kind of Monitoring and management system that gas hydrate slurry body transports, the main work of the system
With being then: first is that having obtained physical property characterization, the index number of the flow and its calculation formula of hydrate slurry state parameter；Second is that
Analyze the nowed forming changing rule of the hydrate slurry containing phase transformation, the multiphase flow flowing of hydrate slurry of the export containing phase transformation
Model；Third is that realizing the steady-state simulation that gas hydrate slurry body transports on the basis of physical property research and experimental data.
As shown in Figure 1, the Monitoring and management system that the gas hydrate slurry body of the present embodiment transports includes the first foundation
Module 1, the first computing module 2, the acquisition of test module 3, first module 4, second establish module 5, the second computing module 6, judgement
Module 7, third establish module 8, steady-state simulation module 9 and monitoring and management module 10, the concrete function of various modules are as follows:
Described first establishes module 1, for establishing seawater and subsea strata model；Wherein, seawater and subsea strata model
Calculating including ocean temperature equation, seawater velocity equation and convective heat-transfer coefficient, the seawater and subsea strata model can incite somebody to action
The data such as ocean temperature equation, seawater rate equation, convective heat-transfer coefficient are passed to second and establish module 5.
First computing module 2 is passed for calculating subsea strata unsteady-state heat transfer numerical value, and by subsea strata unstable state
Hot numerical value passes to second and establishes module 5.
The test module 3, specific as follows for testing the viscosity of gas hydrates slurry:
A, the gas hydrate slurry body under the conditions of different pressures, temperature is prepared.
B, slurry concentration is measured with density bottle method, to the fluid of the gas hydrate slurry body of several various concentration in water
Flow velocity-drop test is carried out in flat pipe, is that the flow behavior of gas hydrate slurry body accumulates basic data.
C, test experiments are carried out to the viscosity of the gas hydrate slurry body of several various concentration, to characterize flow behavior
Index.
Described first obtains module 4, for obtaining gas water on the basis of the viscosity test of gas hydrate slurry body
The Flowing characteristic parameters of object slurry are closed, specific as follows:
A, the flow theory of gas hydrate slurry body is selected.
B, Newtonian fluid mode, Bingham fluid mode, pseudoplastic fluid bulk-mode and Casson fluid mode and its phase are established
The constitutive equation answered, and calculate tube friction.
C, semiempirical correlation, fluid viscosity calculating formula and the shear rate equation of regions of turbulent flow are corrected, natural gas is obtained
The Flowing characteristic parameters of hydrate slurry.
Described second establishes module 5, for the ocean temperature equation according to seawater and subsea strata Model Transfer, seawater speed
Spend the data such as equation, heat convection system, the subsea strata unsteady-state heat transfer numerical value of the first computing module 2 transmitting.And first
The Flowing characteristic parameters for the gas hydrate slurry body that module 4 obtains are obtained, the gas hydrate slurry body containing phase transformation is established
Multiphase flow flow model, i.e. mixed flow model, specific as follows:
For the flow process of the gas hydrate slurry body containing phase transformation, Clausius-Clapeyron (carat primary is established
Dragon) equation, PVT (Process Verification Test, the test of small lot process verification) equation, geometric volume score side
The subsidiary equations such as journey and friction drag loss equation, in conjunction with basic mass-energy conservation equation, circulating bed communication theory and hydration
The intrinsic kinetics model that object generates establishes the multiphase flow flow model of the gas hydrate slurry body containing phase transformation.
Second computing module 6, specific as follows for calculating the parameter that balances each other of gas hydrate slurry body:
A, the temperature variation curve for studying established hydrate slurry heating melting process, utilizes differential scanning calorimeter
Hydrate phasor, the specific heat, thermal coefficient, phase of (Differential Scanning calorimeter, abbreviation DSC) acquisition
Heating, congruent melting point.
B, it balances each other and hydrone infiltration, adsorption theory from thermodynamics, establishes the accounting equation of Phase Equilibrium Temperature.
C, it is combined by specific experiment with calculating, determines phase transition temperature, the specific heat, thermally conductive system of gas hydrate slurry body
Several and concentration.
The judgment module 7, the multiphase flow flow model major parameter of the gas hydrate slurry body for phase transformation will to be contained
Variation course and the parameter that balances each other of gas hydrate slurry body be overlapped comparison, analyze the stream of gas hydrate slurry body
Dynamic and phase-change characteristic determines gas hydrate slurry to judge the manifold and turnover condition of gas hydrate slurry body flowing
The constraint position and key influence factor that body transports；Wherein, flowing and the phase-change characteristic of gas hydrate slurry body are analyzed, thus
Judge the manifold and turnover condition of the flowing of gas hydrate slurry body, specific as follows:
A, with the method for numerical simulation, the formation of Taylor bubble and the flowing shape of the hydrate slurry containing phase transformation are studied
State changing rule；Based on Mandhane manifold figure and FBRM, (Focused Beam Reflectance Measurement is focused
Light beam reflectometry technique) and PVM (Particle Video Microscope, particle video microscope technology) particle monitoring
Equipment, high-speed camera instrument extract main characteristic parameters (temperature, pressure, concentration, the speed of gas hydrate slurry body transport process
Degree, viscosity, hydrate particle/drop mean chord, gas consumption etc.), in conjunction with specific experiment, analysis system pressure, temperature
The correlation of degree, hydrate particle/drop mean chord, gas consumption and manifold.
B, numerical simulation and experiment is combined, verifies the multiphase flow flow model of the gas hydrate slurry body containing phase transformation,
The manifold for obtaining the gas hydrate slurry body containing phase transformation is shifted to new management mechanisms.
The third establishes module 8, the flowing and phase transformation of the gas hydrate slurry body for being obtained according to judgment module 7
Characteristic establishes particle aggregation and decomposition model in gas hydrate slurry body, specific as follows:
The flowing of the gas hydrate slurry body obtained according to judgment module 7 and phase-change characteristic, by gas hydrates
Intrinsic growth model, thermodynamics, the kinetic factor for being formed and being grown with influence gas hydrates, such as viscosity, shearing force, biography
Thermal model etc. organically combines, and establishes particle aggregation and decomposition model in gas hydrate slurry body.
Based on particle aggregation and decomposition model in judgment module 7 and gas hydrate slurry body, can determine in annulus line
The gas hydrate slurry body of the stabilization decomposition region and unstable decomposition region of gas hydrate slurry body, various concentration decomposes
Region is as shown in Fig. 2 a~Fig. 2 d and the default operating condition of steady-state simulation module 9.
The steady-state simulation module 9 can use ASPEN (Advanced System for Process
Engineering, the advanced system of process engineering) PLUS steady-state simulation platform, can establish overall process transports flow chart, into
Steady-state simulation under the default operating condition of row discloses gas hydrate slurry body and transports the stream flowrates of process each unit outlet, composition
It, can be according to the constraint position that gas hydrate slurry body transports and crucial shadow with property and Temperature and pressure distribution situation
Particle aggregation and decomposition model in the factor of sound and gas hydrate slurry body realize the mistake that gas hydrate slurry body transports
Journey matching.
Further, steady-state simulation module 9 include gateway unit, stratomere annular space pipe unit, stratomere drilling rod unit, every
Water pipe section annular space pipe unit and water proof pipeline section drilling rod unit, are able to carry out the dynamic analog that gas hydrate slurry body transports,
And the pressure in annulus line, temperature signal are transmitted in real time.
The monitoring can monitor steady-state simulation mould under default working condition with management module 10 by steady-state simulation module 9
Stream flowrates, composition and property, the Temperature and pressure distribution situation of block each unit outlet carry out mass flow rate, the pressure of full working scope
Power, temperature analysis constantly correct flow parameter and flow process that gas hydrate slurry body transports, and then improve the pressure transported
Power, temperature and flow distribution；Relationship between research state variable, determine constraint condition and influence steady working condition it is main because
Element；By data feedback to particle aggregation and decomposition model in steady-state simulation module 9 and gas hydrate slurry body, and then default work
The operating parameter management system of condition provides decision information for safety management, running optimizatin, realizes defeated to gas hydrate slurry body
The safety prediction of fortune process and evaluation improve operational management when gas hydrate slurry body transports, risk control ability.
Embodiment 2:
As shown in figure 3, present embodiments providing a kind of monitoring and management method that gas hydrate slurry body transports, the party
Method the following steps are included:
S101, seawater and subsea strata model are established.
S102, subsea strata unsteady-state heat transfer numerical value is calculated.
S103, the viscosity for testing gas hydrates slurry.
S104, on the basis of the viscosity test of gas hydrate slurry body, the flowing for obtaining gas hydrate slurry body is special
Property parameter.
S105, according to seawater and subsea strata model, subsea strata unsteady-state heat transfer numerical value and gas hydrate slurry
The Flowing characteristic parameters of body establish the multiphase flow flow model of the gas hydrate slurry body containing phase transformation.
S106, the parameter that balances each other for calculating gas hydrate slurry body.
S107, according to the multiphase flow flow model of the gas hydrate slurry body containing phase transformation and gas hydrate slurry body
Balance each other parameter, analyzes flowing and the phase-change characteristic of gas hydrate slurry body, to judge that gas hydrate slurry body flows
Manifold and turnover condition, determine the constraint position and key influence factor that gas hydrate slurry body transports.
S108, the flowing according to gas hydrate slurry body and phase-change characteristic, establish particle in gas hydrate slurry body
Aggregation and decomposition model.
S109, the constraint position transported according to gas hydrate slurry body and key influence factor and natural gas are hydrated
Particle aggregation and decomposition model in object slurry realize the process compatible that gas hydrate slurry body transports.
S110, the constraint position transported according to gas hydrate slurry body and key influence factor, are realized to gas water
Close safety prediction and the evaluation of object slurry transport process.
In conclusion the present invention can calculate balance each other feature of the gas hydrate slurry body in drilling fluid；
Influence of the state parameter to physical property is analyzed, and then establishes the mathematic(al) representation of related property；Based on Clausius-Clapeyron
Subsidiary equations, the foundation such as equation, PVT equation, geometric volume fractional equation, fluid viscosity equation, friction drag loss equation contain
The multiphase flow flow model of the gas hydrate slurry body of phase transformation；Have studied the flowing shape of the gas hydrate slurry body containing phase transformation
State changing rule, the decomposition of hydrate particle/drop, aggregation and manifold correlation；And steady-state simulation is used, given
Under conditions of realize dynamic analog of gas hydrate slurry body when transporting, compared with traditional monitoring and appraisal procedure, sufficiently
Reflect the dynamic parameter of overall process when gas hydrate slurry body transports, whole system have initiative, accuracy and and
Shi Xing.
The above, only the invention patent preferred embodiment, but the scope of protection of the patent of the present invention is not limited to
This, anyone skilled in the art is in the range disclosed in the invention patent, according to the present invention the skill of patent
Art scheme and its patent of invention design are subject to equivalent substitution or change, belong to the scope of protection of the patent of the present invention.
Claims (10)
1. the Monitoring and management system that gas hydrate slurry body transports, which is characterized in that the system comprises:
First establishes module, for establishing seawater and subsea strata model；
First computing module, for calculating subsea strata unsteady-state heat transfer numerical value；
Test module, for testing the viscosity of gas hydrates slurry；
First obtains module, for obtaining gas hydrate slurry body on the basis of the viscosity test of gas hydrate slurry body
Flowing characteristic parameters；
Second establishes module, for according to seawater and subsea strata model, subsea strata unsteady-state heat transfer numerical value and natural gas
The Flowing characteristic parameters of hydrate slurry establish the multiphase flow flow model of the gas hydrate slurry body containing phase transformation；
Second computing module, for calculating the parameter that balances each other of gas hydrate slurry body；
Judgment module, for the multiphase flow flow model and gas hydrate slurry according to the gas hydrate slurry body containing phase transformation
The parameter that balances each other of body analyzes flowing and the phase-change characteristic of gas hydrate slurry body, to judge gas hydrate slurry body
The manifold and turnover condition of flowing, determine the constraint position and key influence factor that gas hydrate slurry body transports；
Third establishes module, for according to gas hydrate slurry body flowing and phase-change characteristic, establish gas hydrate slurry
Particle aggregation and decomposition model in body；
Steady-state simulation module, constraint position and key influence factor for being transported according to gas hydrate slurry body, Yi Jitian
Particle aggregation and decomposition model in right gas hydrate slurry realize the process compatible that gas hydrate slurry body transports；
Monitoring and management module, constraint position and key influence factor for being transported according to gas hydrate slurry body are realized
Safety prediction and evaluation to gas hydrate slurry body transport process.
2. the Monitoring and management system that gas hydrate slurry body according to claim 1 transports, which is characterized in that described
First establishes in module, and seawater and subsea strata model include ocean temperature equation, seawater velocity equation and convective heat-transfer coefficient
Calculating.
3. the Monitoring and management system that gas hydrate slurry body according to claim 1 transports, which is characterized in that described
In test module, the viscosity of test gas hydrates slurry includes:
Prepare the gas hydrate slurry body under the conditions of different pressures, temperature；
Flow velocity-drop test is carried out to the fluid of the gas hydrate slurry body of various concentration；
Test experiments are carried out to the viscosity of the gas hydrate slurry body of various concentration, to characterize flow behavior index.
4. the Monitoring and management system that gas hydrate slurry body according to claim 1 transports, which is characterized in that described
First obtains in module, and the Flowing characteristic parameters for obtaining gas hydrate slurry body include:
Select the flow theory of gas hydrate slurry body；
Four kinds of fluid modes and its corresponding constitutive equation are established, and calculates tube friction；Wherein, four kinds of fluid modes
Respectively Newtonian fluid mode, Bingham fluid mode, pseudoplastic fluid bulk-mode and Casson fluid mode；
Semiempirical correlation, fluid viscosity calculating formula and the shear rate equation of regions of turbulent flow are corrected, gas hydrates are obtained
The Flowing characteristic parameters of slurry.
5. the Monitoring and management system that gas hydrate slurry body according to claim 1 transports, which is characterized in that described
Second establishes in module, and the multiphase flow flow model for establishing the gas hydrate slurry body containing phase transformation includes:
For the flow process of the gas hydrate slurry body containing phase transformation, subsidiary equation is established, in conjunction with basic mass-energy conservation side
The intrinsic kinetics model that journey, circulating bed communication theory and hydrate generate establishes the gas hydrate slurry body containing phase transformation
Multiphase flow flow model.
6. the Monitoring and management system that gas hydrate slurry body according to claim 1 transports, which is characterized in that described
In second computing module, the parameter that balances each other for calculating gas hydrate slurry body includes:
Hydrate phasor, the specific heat, thermal coefficient, the heat of transformation, congruent melting point obtained using differential scanning calorimeter；
It balances each other and hydrone infiltration, adsorption theory from thermodynamics, establishes the accounting equation of Phase Equilibrium Temperature；
It is combined by specific experiment with calculating, determines the phase transition temperature of gas hydrate slurry body, specific heat, thermal coefficient and dense
Degree.
7. the Monitoring and management system that gas hydrate slurry body according to claim 1 transports, which is characterized in that described
In judgment module, flowing and the phase-change characteristic of gas hydrate slurry body are analyzed, to judge that gas hydrate slurry body flows
Manifold and turnover condition include:
The correlation of the formation of Taylor bubble, hydrate particle/drop mean chord, gas consumption and manifold is carried out
Analysis；
Numerical simulation and experiment is combined, the multiphase flow flow model of the gas hydrate slurry body containing phase transformation is verified, is contained
The manifold of the gas hydrate slurry body of phase transformation is shifted to new management mechanisms.
8. the Monitoring and management system that gas hydrate slurry body according to claim 1-7 transports, feature
It is, the steady-state simulation module includes gateway unit, stratomere annular space pipe unit, stratomere drilling rod unit, water proof pipeline section ring
Blank pipe unit and water proof pipeline section drilling rod unit, are able to carry out the dynamic analog that gas hydrate slurry body transports, and in real time
Pressure, temperature signal in transmitting annulus line.
9. the Monitoring and management system that gas hydrate slurry body according to claim 8 transports, which is characterized in that described
Monitoring and management module be also used to monitor the stream flowrates that steady-state simulation module each unit under default working condition exports, composition and
Property, Temperature and pressure distribution situation.
10. monitoring and management method that gas hydrate slurry body transports, which is characterized in that the described method includes:
Establish seawater and subsea strata model；
Calculate subsea strata unsteady-state heat transfer numerical value；
Test the viscosity of gas hydrates slurry；
On the basis of the viscosity test of gas hydrate slurry body, the Flowing characteristic parameters of gas hydrate slurry body are obtained；
It is special according to the flowing of seawater and subsea strata model, subsea strata unsteady-state heat transfer numerical value and gas hydrate slurry body
Property parameter, establish the gas hydrate slurry body containing phase transformation multiphase flow flow model；
Calculate the parameter that balances each other of gas hydrate slurry body；
According to the ginseng that balances each other of the multiphase flow flow model of the gas hydrate slurry body containing phase transformation and gas hydrate slurry body
Number, analyze gas hydrate slurry body flowing and phase-change characteristic, thus judge gas hydrate slurry body flowing manifold and
Turnover condition determines constraint position and key influence factor that gas hydrate slurry body transports；
According to the flowing of gas hydrate slurry body and phase-change characteristic, establishes particle aggregation in gas hydrate slurry body and decompose
Model；
In the constraint position and key influence factor that are transported according to gas hydrate slurry body and gas hydrate slurry body
Grain aggregation and decomposition model realize the process compatible that gas hydrate slurry body transports；
The constraint position transported according to gas hydrate slurry body and key influence factor are realized defeated to gas hydrate slurry body
The safety prediction of fortune process and evaluation.
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