CN105201487A - Method and device for monitoring hydrate blockage of shaft in production period of deepwater gas field - Google Patents
Method and device for monitoring hydrate blockage of shaft in production period of deepwater gas field Download PDFInfo
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- CN105201487A CN105201487A CN201510557967.4A CN201510557967A CN105201487A CN 105201487 A CN105201487 A CN 105201487A CN 201510557967 A CN201510557967 A CN 201510557967A CN 105201487 A CN105201487 A CN 105201487A
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Abstract
The invention relates to a method for monitoring hydrate blockage of a shaft in the production period of a deepwater gas field. The method comprises steps as follows: S1: selecting a required sensor to acquire required environmental parameters according to environment characteristics of the shaft, calculating the temperature distribution characteristic and the pressure distribution characteristic of the shaft according to the environmental parameters, and determining a hydrate generation area according to the temperature distribution characteristic and the pressure distribution characteristic; S2: judging whether a hydrate blocks the shaft or not according to the hydrate generation area. The invention further relates to a device for monitoring hydrate blockage. With the adoption of the scheme, whether the hydrate blocks the shaft can be judged, the blocked position can be judged, a reasonable solution is recommended, the scheme is applicable to a general hydrate control method during gas reservoir production, production requirements are met, and generation of the hydrate can be reduced.
Description
Technical field
The present invention relates to hydrate monitoring field, more particularly, relate to a kind of deep water gas field production period pit shaft Hydrate Plugging monitoring method and monitoring device.
Background technology
1. in the manufacturing process of deep water gas field, pit shaft corresponding deep-sea well section often meets the condition forming hydrate, and namely temperature is lower, the more high situation of pressure.
In deep water gas field production run process, as in pit shaft because of surface choke change cause wellbore pressure to fluctuate widely, temperature compared with pressure reduction after low, throttling greatly, air flow direction suddenlys change, or the design of construction parameter, working system is improper, may form hydrate soon in the wellbore; And in the natural gas mixture that petroleum and natural gas industry is produced, because gas componant is different and wellbore environment reaches critical condition, also often have gas hydrate and generate, if pit shaft has a large amount of hydrate to exist, with regard to entail dangers to production safety.
2., in order to prevent pit shaft in the manufacturing process of deep water gas field from forming hydrate, often need to adopt many measures, as added chemical inhibitor, step-down, heating, cost is very high.
Under existing technology, solve hydrate problems according to dehydration, thermodynamics or dynamic method, usually along with the change of the mode of production, make gas production that larger change occur, increase production loss.If it is improper that the mode of production changes, not only can not solve hydrate problems, more may cause the gas reservoir underproduction.
3. research shows, in the manufacturing process of deep water gas field, pit shaft can form hydrate, but is not generally have continued propagation, to such an extent as to reaches the situation that can block pit shaft
Under the generation temperature, pressure condition that pit shaft section reaches hydrate, hydrate may be formed, if but dispel the heat bad, and the reason such as water condition is insufficient, hydrate continued growth after generation is very difficult, and growth course stops, and pit shaft would not exist Hydrate Plugging problem.
4. current, whether and where there is Hydrate Plugging in pit shaft, the problem causing gas well to flow happens occasionally also not have a set of concrete method to differentiate.
In the manufacturing process of whole deep water gas field, study more for the generation of hydrate both at home and abroad, but for the trend prediction of hydrate growth, hydrate whether formed blocking, blocking position and when can there is blocking then research is not, only have some single, that directive property is very strong hydrate prevention and controls, lack a set of hydrate prevention and controls going for most of gas reservoir manufacturing process, be difficult to both meet Production requirement in selection reasonable working system, the generation of hydrate can be reduced again.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of deep water gas field production period pit shaft Hydrate Plugging monitoring method and monitoring device.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of deep water gas field production period pit shaft Hydrate Plugging monitoring method.
In the production period pit shaft Hydrate Plugging monitoring method of deep water gas field of the present invention, comprise the following steps:
S1: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of described pit shaft, calculate Characteristics of The Distribution of Temperature, the Pressure Distribution of described pit shaft according to described ambient parameter, determine the formation zone of described hydrate according to described Characteristics of The Distribution of Temperature, described Pressure Distribution;
S2: judge whether described hydrate blocks described pit shaft according to the formation zone of described hydrate;
Wherein, described step S2 comprises:
S2-1: set up blocking discrimination model according to the formation zone of described hydrate;
S2-2: determine the parameter needing monitoring according to described blocking discrimination model, monitors according to the described parameter of monitoring that needs, obtains monitored data;
S2-3: judge whether described hydrate blocks described pit shaft according to described monitored data and described blocking discrimination model.
Preferably, the described parameter of monitoring that needs comprises platform parameters and/or bottom parameters;
Described platform parameters comprise ground flow temperature, ground flow pressure, gas & water yielding, gas component, water salinity, flow velocity one or more;
Described bottom parameters comprise bottom-water temperature, subsea pressure, pipe shape, line size one or more.
Preferably, described step S1 comprises:
S1-1: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of described pit shaft, based on the pit shaft dynamic analysis of deep water gas field production period, select, based on the production period temperature in wellbore computation model of pit shaft radial direction heat transfer, to obtain the Characteristics of The Distribution of Temperature of described pit shaft;
S1-2: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of described pit shaft, based on the pit shaft dynamic analysis of deep water gas field production period, select wellbore pressure computation model between the generation based on the heat transfer of pit shaft radial direction, obtain the Pressure Distribution of described pit shaft;
S1-3: based on described Characteristics of The Distribution of Temperature, described Pressure Distribution, determine the formation zone of described hydrate.
Preferably, also comprise:
S3: if pit shaft described in described Hydrate Plugging, then send hydropac, reminds people to need the measure taking to suppress the generation of described hydrate or de-plugging.
Preferably, described step S3 comprises:
S3-1: the region determining pit shaft described in described Hydrate Plugging according to described blocking discrimination model;
S3-2: the factor judging the described Hydrate Plugging of impact;
S3-3: the region of pit shaft and the factor of the described Hydrate Plugging of described impact recommend rational working system according to described Hydrate Plugging, provide the measure of described hydrate de-plugging.
In the production period pit shaft Hydrate Plugging monitoring device of deep water gas field of the present invention, comprise
Gather the parameter needing monitoring, obtain the situ metrology module of monitored data;
Be connected with described situ metrology module, receive described monitored data, judge whether hydrate blocks pit shaft according to described monitored data and built-in blocking discrimination model, if blocking sends the central processing module of jam signal; And
Be connected with described central processing module, receive described jam signal, and send hydropac, remind people to need to take the off-limit alarm module of the measure suppressing the generation of described hydrate or de-plugging.
Preferably, described situ metrology module comprise temperature measurement module, pressure measurement module, gas flow rate metering module, flow rate of liquid metering module one or more.
Preferably, described situ metrology module is piezoelectric acceleration sensor.
Preferably, described central processing module also comprises
The region decision unit of described Hydrate Plugging shaft area is determined according to described blocking discrimination model; And
Judge the factor judging unit of the described Hydrate Plugging factor of impact.
Preferably, the described parameter of monitoring that needs comprises platform parameters and/or bottom parameters;
Described platform parameters comprise ground flow temperature, ground flow pressure, gas & water yielding, gas component, water salinity, flow velocity one or more;
Described bottom parameters comprise bottom-water temperature, subsea pressure, pipe shape, line size one or more.
Implement deep water gas field of the present invention production period pit shaft Hydrate Plugging monitoring method and monitoring device, there is following beneficial effect: scheme provided by the invention, can differentiate whether hydrate blocks, where block, and recommend rational solution, be applicable to the hydrate prevention and controls of the gas reservoir manufacturing process of generality, both met Production requirement, the generation of hydrate can be reduced again.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the flow chart of deep water gas field of the present invention production period pit shaft Hydrate Plugging monitoring method;
Fig. 2 is the flow chart of deep water gas field production period pit shaft Hydrate Plugging monitoring method step S1 of the present invention;
Fig. 3 is the flow chart of deep water gas field production period pit shaft Hydrate Plugging monitoring method step S2 of the present invention;
Fig. 4 a is the schematic diagram that in the production period pit shaft Hydrate Plugging discrimination model of deep water gas field of the present invention, hydrate generates the initial stage;
Fig. 4 b is the schematic diagram that in the production period pit shaft Hydrate Plugging discrimination model of deep water gas field of the present invention, hydrate forms attachment at tube wall;
Fig. 4 c is the schematic diagram that in the production period pit shaft Hydrate Plugging discrimination model of deep water gas field of the present invention, hydrate does not form blocking;
Fig. 4 d is the schematic diagram of gas hydrate synthesis blocking in the production period pit shaft Hydrate Plugging discrimination model of deep water gas field of the present invention;
Fig. 5 is the flow chart of deep water gas field production period pit shaft Hydrate Plugging monitoring method step S3 of the present invention;
Fig. 6 is the structural representation of deep water gas field of the present invention production period pit shaft Hydrate Plugging monitoring device.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only for explaining the present invention, being not intended to limit the present invention.
The present invention sets up based on the generation of hydrate, blocking mechanism:
Under temperature, pressure reach Hydrate Formation Conditions, the molecular dynamics that gas molecule forms hydrate can be divided into two parts: the nucleation being first hydrate; Next is the growth of hydrate.Most scholar all thinks that hydrate particle is formed in the interface of solution gas, water, and this is not only because interface reduces the Gibbs free energy (i.e. Gibbs free energy) of nucleation, and gas in interface, liquid concentration are all very high.Up to 15%, and only can dissolve the water of 5% in the gas phase in the molar fraction of interface solution gas, in aqueous phase, only can dissolve the gas of maximum 0.1%.Due to so low solubility, in continuous phase, although hydrate can nucleation, particle may be formed hardly.In interface high mixing velocity, can make to bring about the desired sensation, the crystal structure Dispersion on surface of liquid in the liquid phase.After gas dissolution is in water, hydrone forms unstable molecular cluster at once at solution gas surrounding molecules.Gather one piece due to shared chemical bond between different molecular clusters, start growth unordered in a jumble, when the size of molecular cluster reaches critical dimension, just define hydrate core, start growth afterwards.
When hydrate growth to a certain extent after, the position that hydrate is formed at first is positioned at tube wall, with the form deposited formed because tube wall is moist, and be constantly exposed in gas.
The growth of hydrate is limited, is no matter supply or the temperature of air water.Initial hydrate housing may be formed very soon according to hydrate kinetic, because have water and air.In the near future, hydrate continued growth process is typical mass transfer or diabatic process.The former is that water and/or gas must be diffused into interface, and the latter is an exothermic process.Once have abundant hydrate in system, hydrate slurry can change the nowed forming of system, suspends in the liquid phase or be deposited on solid phase surface with hydrate.
After hydrate exists, hydrate particle can be condensed into larger aggregation or continuous deposition mutually at tube wall.Continuous print liquid phase is depended in interaction between hydrate particle to a great extent.If hydrate particle is dispersed in continuous aqueous phase, the adhesion between hydrate particle is minimum, and they can keep dispersion.If particle dispersion is at oil-continuous phase, owing to hydrate particles may be made to be combined into large aggregation by the capillary force of water between particle.As time goes on constantly accumulate, hydrate finally may form blocking at steady state operation.
As shown in Figure 1, in the production period pit shaft Hydrate Plugging monitoring method of deep water gas field of the present invention, comprise the following steps:
S1: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of pit shaft, environmentally parameter calculates Characteristics of The Distribution of Temperature, the Pressure Distribution of pit shaft, according to the formation zone of Characteristics of The Distribution of Temperature, Pressure Distribution determination hydrate; Understandable, in order to saferly oil gas can be exploited efficiently, need generation temperature, pressure, the gas-water ratio of determining hydrate according to the different parameters in pit shaft different operating period, pit shaft hydrate Generating Problems, growth question is accurately differentiated with this, to predict the concrete region of Hydrate Plugging pit shaft in subsequent step, rational working system suggestion under different gas reservoir parameter can be given in.
Concrete, as shown in Figure 2, this step S1 comprises the following steps:
S1-1: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of pit shaft, based on the pit shaft dynamic analysis of deep water gas field production period, select, based on the production period temperature in wellbore computation model of pit shaft radial direction heat transfer, to obtain the Characteristics of The Distribution of Temperature of pit shaft;
S1-2: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of pit shaft, based on the pit shaft dynamic analysis of deep water gas field production period, select wellbore pressure computation model between the generation based on the heat transfer of pit shaft radial direction, obtain the Pressure Distribution of pit shaft;
Further, by selecting oil gas water multiphase single order Quasilinear Hyperbolic type partial differential equations, multiphase flow flow parameter in production period pit shaft is solved.
S1-3: based on Characteristics of The Distribution of Temperature, Pressure Distribution, determines the formation zone of hydrate.Concrete, according to hydrate molecule Cambium periodicity principle, based on Characteristics of The Distribution of Temperature, the Pressure Distribution of the pit shaft obtained, determine gas hydrate synthesis region under gas-liquid two-phase mist flow state.
Further, according to the temperature, pressure condition in the region of gas hydrate synthesis, calculate the gas well output causing pit shaft hydrate to generate.
S2: judge whether hydrate blocks pit shaft according to the formation zone of hydrate;
Concrete, as shown in Figure 3, this step S2 comprises the following steps:
S2-1: set up blocking discrimination model according to the formation zone of hydrate;
Concrete, if certain section of pit shaft possesses form hydrate condition, have hydrate and exist; Hydrate may adhere in the process of advancing on tube wall, and then grows.If the power of hydrate growth, if the gas that the adhesion also namely between hydrate particle is less than lower step upwards flows give the drag force of hydrate particle, now hydrate crystal growth difficulty, along with hydrate layer thickeies, in pit shaft, gas flow diameter diminishes, when total flow is constant, flow velocity increases, further drag force increases, and hydrate crystal growth is more difficult, finally remains on an equilibrium state.When drag force is not enough to the gravity of adhesion between the polymer beads of equilibrium water and hydrate self, hydrate will continue to increase at same position, finally blocks pit shaft.
For the pit shaft shown in Fig. 4,
Suppose that tube wall hydrate thickness is d, then this place's gas flowing cross sectional radius is R=(L-2d)/2, and gas flow rates is:
In formula, L is mineshaft diameter, m; Q is gas flow, m
3/ d.
Suppose that hydrate particle is spheroidal, radius is r, then it is mainly by 3 power effects: the effect such as force of crystallization, drag force between gravity, hydrate.
Gravity formulat is:
ρ in formula
hhydrate density, kg/m
3; G is acceleration of gravity, m
3/ d.
Between hydrate, force of crystallization is: F
c, its value is relevant with granular size, records by experiment.After particle departs from tube wall hydrate, its value is 0.
Hydrate drag force is:
F
f＝6πμvr
Wherein
v＝v
g
μ gas viscosity in formula, mPas; v
ggas flow rate, m
2/ s.
Then make a concerted effort suffered by the hydrate particle be,
F＝F
f-Gcosθ-F
c
Substitute into
When hydrate particle is in stress balance critical condition, make a concerted effort F=0, then have
Now gas flowing section radius is
Now hydrate thickness
As R>r, show that, along with gas flow pattern area reduces, under determining production Q situation, in pit shaft, gas flow rate increases, and corresponding drag force increases, in pit shaft, hydrate cannot form cohesion blocking.
As R<r, show that hydrate cannot be carried into well head by drag force, blocking can be formed in pit shaft.
S2-2: determine according to blocking discrimination model the parameter needing monitoring, the parameter of monitoring as required is monitored, and obtains monitored data;
Wherein, the parameter of monitoring is needed to comprise platform parameters and/or bottom parameters;
This platform parameters comprise ground flow temperature, ground flow pressure, gas & water yielding, gas component, water salinity, flow velocity one or more;
This bottom parameters comprise bottom-water temperature, subsea pressure, pipe shape, line size one or more.
S2-3: judge whether hydrate blocks pit shaft according to monitored data and blocking discrimination model.
S3: if Hydrate Plugging pit shaft, then send hydropac, reminds people to need the measure taking to suppress hydrate generation or de-plugging.When there is Hydrate Plugging in pit shaft, parameter will pass back in the middle of computer by monitoring sensor, computer differentiates whether the degree that hydrate generates can threaten normal production status after treatment, once the generation degree of hydrate exceedes deep water gas well normally produce allowed maximum generation degree, computer will send hydropac, reminds people to need the measure taking to suppress hydrate generation or de-plugging.
Concrete, as shown in Figure 5, this step S3 comprises the following steps:
S3-1: according to the region of blocking discrimination model determination Hydrate Plugging pit shaft;
S3-2: judge the factor affecting Hydrate Plugging;
Concrete, the factor of Hydrate Plugging pit shaft comprises: the too low reason of temperature, hypertonia reason, the too high reason of water vapor concentration, the too low reason of gas flow rate.
S3-3: rational working system is recommended with the factor affecting Hydrate Plugging in the region according to Hydrate Plugging pit shaft, provides the measure of hydrate de-plugging.
Concrete, rational working system is recommended with the factor affecting Hydrate Plugging in region according to Hydrate Plugging pit shaft, the measure providing hydrate de-plugging comprises: 1. expanding production pressure reduction, gas production is increased, finally make temperature in wellbore rise, 2. reduce well head pressure, and then reduce wellbore pressure, 3. according to selection injecting inhibitor position, Hydrate Plugging position etc.
Scheme provided by the invention, can differentiate whether hydrate blocks, where block, and recommend rational solution, is applicable to the hydrate prevention and controls of the gas reservoir manufacturing process of generality, both meets Production requirement, can reduce again the generation of hydrate.
As shown in Figure 6, present invention provides a kind of deep water gas field production period pit shaft Hydrate Plugging monitoring device, comprise situ metrology module 610, central processing module 620 and off-limit alarm module 630.
The collection of this situ metrology module 610 needs the parameter of monitoring, obtains monitored data; This situ metrology module 610 comprise temperature measurement module, pressure measurement module, gas flow rate metering module, flow rate of liquid metering module one or more, for gather need monitoring parameter, obtain monitored data.The present invention adopts the carbide alloy diaphragm of erosion-wear-resisting as signal generator, when the gas of different component, liquid and solid phase particles with high velocity jet to this diaphragm time, will different vibration signals be produced.By the vibration signal of highly sensitive piezoelectric acceleration sensor pickup carbide alloy diaphragm, and by computer data acquiring and treatment system Real-time Collection with record vibration signal, carry out the spectrum analysis of vibration signal in real time.According to the different spectrum signature of the heterogeneous fluid of different component, detect in real time and judge down-hole situation.After the sensor of this system is arranged on well head choke valve, before gas-liquid separator, be connected with front and back with API plain end oil well pipe button.The design maximum working pressure (MWP) of detecting sensor is 10MPa.
Wherein, the parameter of monitoring is needed to comprise platform parameters and/or bottom parameters;
This platform parameters comprise ground flow temperature, ground flow pressure, gas & water yielding, gas component, water salinity, flow velocity one or more;
This bottom parameters comprise bottom-water temperature, subsea pressure, pipe shape, line size one or more.
" pipe aperture is Ф 62mm, and the flow velocity calculated at sensor place is 191.7m/s assuming that the gas production of a bite well is 50 cubic meters per day, to be reduced to 1MPa, 2-7/8 at pressure after choke valve.Flow velocity is directly proportional to gas production, is inversely proportional to the pressure after choke valve.
Assuming that the Liquid output of a bite well is 200 cubic metres/day, namely flow is 2.3L/s, 2-7/8, and " pipe aperture is Ф 62mm, and the flow velocity calculated at sensor place is 0.766m/s.Flow velocity is directly proportional to Liquid output.
As can be seen here, the flow velocity of the velocity ratio barreler of high gas rate well is much higher.If output gas and liquid simultaneously, the flow velocity and gas production, Liquid output and the throttling downstream pressure that now mix two phase flow have relation.
This central processing module 620 is connected with situ metrology module 610, receives monitored data, judges whether hydrate blocks pit shaft according to monitored data and built-in blocking discrimination model, if blocking sends jam signal.When there is Hydrate Plugging in pit shaft, parameter will pass back in the middle of computer by monitoring sensor, computer differentiates whether the degree that hydrate generates can threaten normal production status after treatment, once the generation degree of hydrate exceedes deep water gas well normally produce allowed maximum generation degree, computer will send hydropac, reminds people to need the measure taking to suppress hydrate generation or de-plugging.
Further, this central processing module 620 also comprises region decision unit 621 and factor judging unit 622.
This region decision unit 621 is according to blocking discrimination model determination Hydrate Plugging shaft area; This factor judging unit 622 judges to affect Hydrate Plugging factor.Concrete, the factor of Hydrate Plugging pit shaft comprises: the too low reason of temperature, hypertonia reason, the too high reason of water vapor concentration, the too low reason of gas flow rate.
Central processing module 620 recommends rational working system according to the region of Hydrate Plugging pit shaft and the factor affecting Hydrate Plugging, the measure providing hydrate de-plugging comprises: 1. expanding production pressure reduction, gas production is increased, finally make temperature in wellbore rise, 2. reduce well head pressure, and then reduce wellbore pressure, 3. according to selection injecting inhibitor position, Hydrate Plugging position etc.
This off-limit alarm module 630 is connected with central processing module 620, receives jam signal, and sends hydropac, reminds people to need the measure taking to suppress hydrate generation or de-plugging.
Scheme provided by the invention, can differentiate whether hydrate blocks, where block, and recommend rational solution, is applicable to the hydrate prevention and controls of the gas reservoir manufacturing process of generality, both meets Production requirement, can reduce again the generation of hydrate.
Further, Bound moisture compound monitoring method of the present invention and monitoring device, are got rid of the factor impacts such as inter-trade, are had the advantage such as integration, continuity.
The present invention studies the outer seawater of different production marine riser in period pipe and temperature and pressure characteristic in pipe, select the position calculation model that hydrate may be formed, system of researching and producing generates the impact of growth on hydrate, rational production system can be recommended and add water prevention compound inhibitors in good time, making the accidents such as Hydrate Plugging to occur in manufacturing process pit shaft.
Deep water gas field production period pit shaft Hydrate Plugging monitoring method index system based on gas hydrate synthesis computation model is complete, and computational complexity is low.
Understandable, above embodiment only have expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention; It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can carry out independent assortment to above-mentioned technical characterstic, can also make some distortion and improvement, these all belong to protection scope of the present invention; Therefore, all equivalents of doing with the claims in the present invention scope and modification, all should belong to the covering scope of the claims in the present invention.
Claims (10)
1. a deep water gas field production period pit shaft Hydrate Plugging monitoring method, is characterized in that, comprise the following steps:
S1: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of described pit shaft, calculate Characteristics of The Distribution of Temperature, the Pressure Distribution of described pit shaft according to described ambient parameter, determine the formation zone of described hydrate according to described Characteristics of The Distribution of Temperature, described Pressure Distribution;
S2: judge whether described hydrate blocks described pit shaft according to the formation zone of described hydrate;
Wherein, described step S2 comprises:
S2-1: set up blocking discrimination model according to the formation zone of described hydrate;
S2-2: determine the parameter needing monitoring according to described blocking discrimination model, monitors according to the described parameter of monitoring that needs, obtains monitored data;
S2-3: judge whether described hydrate blocks described pit shaft according to described monitored data and described blocking discrimination model.
2. deep water gas field according to claim 1 production period pit shaft Hydrate Plugging monitoring method, is characterized in that, the described parameter of monitoring that needs comprises platform parameters and/or bottom parameters;
Described platform parameters comprise ground flow temperature, ground flow pressure, gas & water yielding, gas component, water salinity, flow velocity one or more;
Described bottom parameters comprise bottom-water temperature, subsea pressure, pipe shape, line size one or more.
3. deep water gas field according to claim 1 production period pit shaft Hydrate Plugging monitoring method, it is characterized in that, described step S1 comprises:
S1-1: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of described pit shaft, based on the pit shaft dynamic analysis of deep water gas field production period, select, based on the production period temperature in wellbore computation model of pit shaft radial direction heat transfer, to obtain the Characteristics of The Distribution of Temperature of described pit shaft;
S1-2: the ambient parameter selecting the sensor collection needed to need according to the environmental characteristic of described pit shaft, based on the pit shaft dynamic analysis of deep water gas field production period, select wellbore pressure computation model between the generation based on the heat transfer of pit shaft radial direction, obtain the Pressure Distribution of described pit shaft;
S1-3: based on described Characteristics of The Distribution of Temperature, described Pressure Distribution, determine the formation zone of described hydrate.
4. deep water gas field according to claim 1 production period pit shaft Hydrate Plugging monitoring method, is characterized in that, also comprise:
S3: if pit shaft described in described Hydrate Plugging, then send hydropac, reminds people to need the measure taking to suppress the generation of described hydrate or de-plugging.
5. deep water gas field according to claim 4 production period pit shaft Hydrate Plugging monitoring method, it is characterized in that, described step S3 comprises:
S3-1: the region determining pit shaft described in described Hydrate Plugging according to described blocking discrimination model;
S3-2: the factor judging the described Hydrate Plugging of impact;
S3-3: the region of pit shaft and the factor of the described Hydrate Plugging of described impact recommend rational working system according to described Hydrate Plugging, provide the measure of described hydrate de-plugging.
6. a deep water gas field production period pit shaft Hydrate Plugging monitoring device, is characterized in that, comprise
Gather the parameter needing monitoring, obtain the situ metrology module of monitored data;
Be connected with described situ metrology module, receive described monitored data, judge whether hydrate blocks pit shaft according to described monitored data and built-in blocking discrimination model, if blocking sends the central processing module of jam signal; And
Be connected with described central processing module, receive described jam signal, and send hydropac, remind people to need to take the off-limit alarm module of the measure suppressing the generation of described hydrate or de-plugging.
7. deep water gas field according to claim 6 production period pit shaft Hydrate Plugging monitoring device, it is characterized in that, described situ metrology module comprise temperature measurement module, pressure measurement module, gas flow rate metering module, flow rate of liquid metering module one or more.
8. deep water gas field according to claim 6 production period pit shaft Hydrate Plugging monitoring device, it is characterized in that, described situ metrology module is piezoelectric acceleration sensor.
9. deep water gas field according to claim 6 production period pit shaft Hydrate Plugging monitoring device, it is characterized in that, described central processing module also comprises
The region decision unit of described Hydrate Plugging shaft area is determined according to described blocking discrimination model; And
Judge the factor judging unit of the described Hydrate Plugging factor of impact.
10. deep water gas field according to claim 6 production period pit shaft Hydrate Plugging monitoring device, is characterized in that, the described parameter of monitoring that needs comprises platform parameters and/or bottom parameters;
Described platform parameters comprise ground flow temperature, ground flow pressure, gas & water yielding, gas component, water salinity, flow velocity one or more;
Described bottom parameters comprise bottom-water temperature, subsea pressure, pipe shape, line size one or more.
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| CN106322121A (en) * | 2016-08-26 | 2017-01-11 | 中国石油大学(华东) | Early monitoring device and method for hydrate blockage of deep water gas well production pipeline |
| CN106872660A (en) * | 2016-12-28 | 2017-06-20 | 中国石油大学(北京) | A kind of deep water gas well surface shut-in stage gas hydrates growth simulation device |
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| CN111287706A (en) * | 2020-02-14 | 2020-06-16 | 中国海洋石油集团有限公司 | Deepwater oil and gas field underwater facility and hydrate blockage removing method thereof |
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| CN111664356A (en) * | 2020-06-16 | 2020-09-15 | 陕西航天德林科技集团有限公司 | Well site throttling method and well site throttling system |
| CN111749659A (en) * | 2020-07-02 | 2020-10-09 | 中海石油(中国)有限公司湛江分公司 | Method for preventing and controlling hydrate in deep water gas field shaft |
| CN111980670A (en) * | 2020-09-27 | 2020-11-24 | 西南石油大学 | Method for calculating well bottom sand setting amount in marine natural gas hydrate drilling and production process |
| CN111980670B (en) * | 2020-09-27 | 2022-04-15 | 西南石油大学 | Method for calculating well bottom sand setting amount in marine natural gas hydrate drilling and production process |
| CN113153220A (en) * | 2021-04-29 | 2021-07-23 | 中国石油天然气股份有限公司 | Method for evaluating dredging effect of gas well shaft |
| CN113153220B (en) * | 2021-04-29 | 2023-01-20 | 中国石油天然气股份有限公司 | Method for evaluating dredging effect of gas well shaft |
| CN113153236A (en) * | 2021-05-07 | 2021-07-23 | 中海石油(中国)有限公司 | Device and method for jointly replacing shaft by diesel oil and production water |
| CN113153236B (en) * | 2021-05-07 | 2022-12-02 | 中海石油(中国)有限公司 | Device and method for jointly replacing shaft by diesel oil and production water |
| CN113139348A (en) * | 2021-05-12 | 2021-07-20 | 大连理工大学 | Early warning method for hydrate blockage in pipeline based on machine learning model |
| CN113236195A (en) * | 2021-06-15 | 2021-08-10 | 中国矿业大学 | Method for cooperatively regulating and controlling hydrate generation risk of drilling shaft by using three factors |
| CN113236195B (en) * | 2021-06-15 | 2022-04-19 | 中国矿业大学 | Method for cooperatively regulating and controlling hydrate generation risk of drilling shaft by using three factors |
| CN114368844A (en) * | 2021-12-15 | 2022-04-19 | 庆阳新庄煤业有限公司新庄煤矿 | Data monitoring method and device for high-salinity mine water treatment |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Deepwater Development Limited Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: CNOOC Research Institute Co-patentee after: China University of Petroleum (Beijing) Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Deepwater Development Limited Patentee before: China National Offshore Oil Corporation Co-patentee before: CNOOC Research Institute Co-patentee before: China University of Petroleum (Beijing) |
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