CN107607081A - A kind of the seabed deformation monitoring instrument and its application method of gas hydrates exploitation - Google Patents
A kind of the seabed deformation monitoring instrument and its application method of gas hydrates exploitation Download PDFInfo
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- CN107607081A CN107607081A CN201710756812.2A CN201710756812A CN107607081A CN 107607081 A CN107607081 A CN 107607081A CN 201710756812 A CN201710756812 A CN 201710756812A CN 107607081 A CN107607081 A CN 107607081A
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Abstract
The invention discloses the seabed deformation monitoring instrument and its application method of a kind of ocean gas hydrate exploitation, the instrument is fixedly mounted on seabed and is expected on the monitoring position of settling zone, and it includes main controller, data acquisition module, battery pack, PMU, memory, underwater acoustic communication unit, inclination sensor, pressure sensor, magnetometer, temperature sensor, inertial gyroscope, time reference circuit and clock circuit；Battery pack is connected by PMU with main controller；Data acquisition module, PMU, memory, underwater acoustic communication unit, magnetometer, temperature sensor, inertial gyroscope, time reference circuit and clock circuit are connected with main controller；Inclination sensor and pressure sensor are connected by data acquisition module with main controller.The present invention can solve the problems, such as that monitoring caused by the working environment of seabed/detecting instrument poor operability, the time error of data are big.
Description
Technical field
The present invention relates to the seabed deformation monitoring instrument of gas hydrates exploitation.
Background technology
In hydrate pre-production phase, solid hydrate is decomposed into pore water and free gas after bottom pressure reduction, made
Into the softening of deposit skeleton and reservoir liquefaction, and then cause the Local Layer of developing zone to settle and/or tilt, can be led when serious
Cause Pile Foundation of Offshore Platforms to change to cause the accident.Therefore the formation variation effectively in monitoring hydrate recovery process has important
Meaning.
Existing technical scheme is to obtain seabed hydraulic pressure and surface of stratum inclination angle by hydraulic pressure sensor and obliquity sensor
Mutation analysis go out stratum settlement and inclined situation, so as to realize exploiting ocean natural gas hydrates process to stratum settlement,
Inclined monitoring in real time.It mainly includes main frame, automatic levitating device, grating sensing monitoring device, Big Dipper locating module and cable
Line.
The main body of its main frame is " H " type structure, is made up of resistant material, for supporting and fixing other devices.
Hook is equipped with the top of main frame, in the stage of sinking, is linked up with for connecting the hawser on crane.
Its automatic levitating device is made up of buoyancy tank, balancing weight, base and electromagnetic relay；Buoyancy tank is located at " H " type main frame
On middle crossbeam, the body structure that is made up of high pressure resistant anticorrosion material bears the bathybic hydraulic pressure of 2000m, is inside it
Hollow structure, each part is on the one hand protected by sea water intrusion, on the other hand not provide enough buoyancy for device to reclaim.Bottom
Seat is fixed on main frame one end, and its bottom is provided with polylith balancing weight and electromagnetic relay, and electromagnetic relay is located among base,
For connect base and main frame.
Its grating sensing monitoring device is made up of hydraulic pressure sensor and obliquity sensor, and hydraulic pressure sensor is arranged in buoyancy tank, its
Probe and contact with sea water, measure the hydraulic pressure of buoyancy tank position and ensure that hydraulic pressure sensor is not exclusively immersed in seawater；Inclination angle
Sensor is arranged on the position among bottom in buoyancy tank, for measuring the inclination angle of monitoring device so as to obtaining the inclination and distortion on stratum
Situation.
Its Big Dipper locating module is arranged at the top of buoyancy tank, for providing the positioning signal of monitoring device.
Its cable one end is connected with grating sensing monitoring device, the other end and the data acquisition and control device on production platform
It is connected；There is two paths of signals line in cable, signal wire is used for the instruction for transmitting control device all the way, and another signal line is used to pass
Defeated grating sensing monitoring device data measured.
Existing technical scheme relies primarily on cable mode and is powered and communicates, operable below 2000 meters of seabed
Property it is poor, while because seawater flowing, fish collide and gnaw bite cable etc. the reliability and stability of device measuring is produced it is bad
Influence, thus it is fine in shallow sea application as a kind of theoretical scheme, and deep water applications are then extremely difficult, let alone carry out long-term deep
Water monitoring.
The content of the invention
For overcome the deficiencies in the prior art, an object of the present invention is that providing a kind of ocean gas hydrate opens
The seabed deformation monitoring instrument of hair, it can solve the problems, such as that poor operability, the time error of data are big.
The second object of the present invention is to provide a kind of seabed deformation monitoring instrument of ocean gas hydrate exploitation
Application method, it can be solved the problems, such as, and the time error of data is big, installation process has an impact to sensor.
An object of the present invention is realized using following technical scheme：
A kind of seabed deformation monitoring instrument of ocean gas hydrate exploitation, it is fixedly mounted on seabed and is expected decanting zone
On the monitoring position in domain, it includes main controller, data acquisition module, battery pack, PMU, memory, underwater acoustic communication
Unit, inclination sensor, pressure sensor, magnetometer, temperature sensor, inertial gyroscope, time reference circuit and clock electricity
Road；Battery pack is connected by PMU with main controller；Data acquisition module, PMU, memory, the underwater sound lead to
News unit, magnetometer, temperature sensor, inertial gyroscope, time reference circuit and clock circuit are connected with main controller；Tilt
Sensor and pressure sensor are connected by data acquisition module with main controller；
The main controller, before the water under the seabed deformation monitoring instrument, it is connected with an outside time service device, and read
The time of the outside time service device is taken, so that the time of data acquisition module, clock circuit and the outside time service device
Time synchronizes；And under the seabed deformation monitoring instrument after water, adopted by the time reference circuit calibration data
Collect module obtain inclination sensor, pressure sensor output data caused by acquisition time.
Preferably, the main controller is additionally operable to data acquisition module, magnetometer, temperature sensor and inertial gyroscope is defeated
The data gone out are preserved to memory.
Preferably, the main controller is additionally operable to data acquisition module, magnetometer, temperature sensor and inertial gyroscope is defeated
The data gone out transmit the underwater acoustic communication host computer system to sea by underwater acoustic communication unit.
Preferably, the outside time service device is satellite time transfer module.
Preferably, the inclination sensor is Orthogonal Double component obliquity sensor.
Preferably, the time reference circuit is Low Drift Temperature time reference circuit.
Preferably, the clock circuit is crystal oscillator.
The second object of the present invention is realized using following technical scheme：
A kind of application method of the seabed deformation monitoring instrument of ocean gas hydrate exploitation, it comprises the following steps：
Under the deformation monitoring instrument of seabed before water, main controller is connected with outside time service device, main controller reads described outer
The time of portion's time service device, so that the time of data acquisition module, clock circuit and the time progress of the outside time service device
It is synchronous；
Under the deformation monitoring instrument of seabed after water, main controller disconnects with outside time service device, main controller passage time
Reference circuit calibration data acquisition module caused by the data that acquisition inclination sensor, pressure sensor export when gathering
Between.
Preferably, to avoid rocking and vibrate and being had an impact to sensor for installation process, the application method also include with
Lower step：Under the deformation monitoring instrument of seabed after water, and when seabed deformation monitoring instrument is kept in motion, main controller control is inclined
Oblique sensor is in stop working state, after seabed deformation monitoring instrument is completed to sit bottom, main controller controls inclination sensor
Electrifying startup.
Compared with prior art, the beneficial effects of the present invention are：
The instrument of the present invention obtains good autonomous working ability by self-contained battery, and realizes that low-power consumption works, together
When by rationally applying underwater acoustic communication unit, can realize gas hydrates reconnoitre field deep water instrument untethered communication and from
Power supply long-term work.
Brief description of the drawings
Fig. 1 is that the structure for the seabed deformation monitoring instrument that the ocean gas hydrate of present pre-ferred embodiments is developed is shown
It is intended to；
Fig. 2 is the user for the seabed deformation monitoring instrument that the ocean gas hydrate of present pre-ferred embodiments is developed
The flow chart of method.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further：
As shown in figure 1, present embodiment discloses a kind of ocean gas hydrate exploitation seabed deformation monitoring instrument, its
It is fixedly mounted on seabed to be expected on the monitoring position of settling zone, it includes main controller, data acquisition module, battery pack, power supply
Administrative unit, memory, underwater acoustic communication unit, inclination sensor, pressure sensor, magnetometer (direction sensor), temperature pass
Sensor, inertial gyroscope, time reference circuit and clock circuit；Battery pack is connected by PMU with main controller；Number
According to acquisition module, PMU, memory, underwater acoustic communication unit, magnetometer, temperature sensor, inertial gyroscope, time
Reference circuit and clock circuit are connected with main controller；Inclination sensor and pressure sensor pass through data acquisition module and master control
Device connects；
The main controller, before the water under the seabed deformation monitoring instrument, it is connected with an outside time service device, and read
The time of the outside time service device is taken, so that the time of data acquisition module, clock circuit and the outside time service device
Time synchronizes；And under the seabed deformation monitoring instrument after water, adopted by the time reference circuit calibration data
Collect module obtain inclination sensor, pressure sensor output data caused by acquisition time；And for data to be adopted
Collection module, magnetometer, temperature sensor and the data of inertial gyroscope output are preserved to memory；And it is additionally operable to adopt data
Collection module, magnetometer, temperature sensor and the data of inertial gyroscope output are transmitted to sea by underwater acoustic communication unit
Underwater acoustic communication host computer system.
The outside time service device of the present embodiment uses satellite time transfer module, and inclination sensor is passed using Orthogonal Double component inclination angle
Sensor, time reference circuit use Low Drift Temperature time reference circuit, and clock circuit uses crystal oscillator, and pressure sensor uses
Hydraulic pressure sensor, memory are SD card memory, and main controller uses arm processor.
In hydrate pre-production phase, buried solid hydrate is decomposed into pore water and free gas after bottom pressure reduction
Body, the softening of deposit skeleton and reservoir liquefaction are caused, and then cause the Local Layer of developing zone to settle and/or tilt.Accordingly,
The seabed deformation monitoring instrument of the present embodiment is developed, inclination sensor and pressure sensor are combined and realize that seabed deforms
Monitoring.After collapsing generation, inclination sensor can be directly to measuring, with inertia from disturbance vertically and horizontally
After gyroscope etc. is used cooperatively, well azimuth can also be measured, so as to obtain more complete sea floor slope information.So
And although seabed collapses the local sedimentation in the seabed that is bound to cause, not necessarily cause pendage, now, it is necessary to according to
Distinguished by high-precision water-pressure survey, when pressure sensor sinks with seabed, its pressure recorded has one
Abnormal increase.Further, geophysical inverse method can be used to calculate pilot production process to hydrate reservoir influence area
Spread, position, orientation, the information such as inclination angle, provide science to improve pilot production scheme and establishing hydrate commercial recovery project
Foundation.
The seabed deformation monitoring instrument of the present embodiment is the instrument for the station formula for being laid in seabed, in expected settling zone
The change of the environmental physical parameters such as gradient, hydraulic pressure on different locations is continuously monitored and recorded.Therefore height need to be integrated with
Polytype sensors such as sensitivity inclination sensor, high-accuracy water pressure sensor, inertial gyroscope, temperature sensor and therewith
Supporting digitized measurement, record and function of supplying power.
The working method of station formula be considered pilot production spend Cheng Qian's middle and later periods between continuous monitoring with record substantially will
Ask, and the design result of South Sea hydrate pilot production region feature.As an intelligence with long-time autonomous working ability
Sensor unit can be changed, seabed deformation monitoring instrument being capable of long-time complete independently seabed deformation monitoring work on fixed location
Make, or system is formed with other stations, more location joint seabed deformation monitorings for a long time are completed in a big way.
The modular design feature of seabed deformation monitoring instrument make it possible to support a variety of dissimilar sensors and its
Combination.The Orthogonal Double that the deformation of measurement seabed is integrated with current design divides obliquity sensor, the Static Water of measurement seabed sedimentation
Pressure meter (hydraulic pressure sensor) etc. two kinds of core sensors, and it is matched use, measure orientation and posture magnetometer and
Inertial gyroscope assembly, the temperature sensor for measuring operating ambient temperature, the crystal oscillation that accurate time reference is provided for system
Polytype aiding sensors group such as device.
The static hydraulic pressure sensor design measurement sensitivity of measurement seabed sedimentation reaches 0.1kPa (corresponding 1 centimeter water column).
In order to make keeping relatively uniform measuring accuracy in prolonged measurement process, employ normal pressure and carry out parameter mark
Fixed and calculating, the inherent drift problem of high sensor is eliminated by backoff algorithm, be allowed to keeping measuring accuracy
Reach higher measurement sensitivity simultaneously.
Same principle, faint deformation of the measurement seabed during hydrate pilot production need to use highly sensitive orthogonal
Double component obliquity sensors, design measurement accuracy are better than 0.01 °.This kind of sensor sacrifices while high sensitivity is ensured
Some other characteristic such as drift characteristic, range ability, each sensitive axes use dual sensor differential design, are inclined with compensation
The intrinsic drift of angle transducer.
Pressure sensor using absolute pressure calibration design, sensor respectively with internal reference Pressure chamber and external environment condition phase
Even, internal reference pressure and ambient exterior atmospheric pressure are periodically measured, the pressure value measured twice has the drift of identical zero point
Direction and similar null offset total amount are moved, the intrinsic drift of sensor can be largely eliminated by backoff algorithm.
Sensor for attitude measurement belongs to subtest, is using the sensor of general industry level according to actual requirement
It can meet to require.
Reference data and the short-term needs that real time data is provided and supplies production safety to assess are obtained in view of long-term seabed of placing,
Seabed deformation monitoring instrument possesses unattended and two kinds of mode of operations of real-time monitoring.During unattended pattern, battery pack is used
Power (6~12 months), data are read after instrument recovery.Real-time monitoring mode is then by underwater acoustic communication unit and sea
Underwater acoustic communication host computer system carries out the transmission of data and control signal, realizes the live retaking of a year or grade of sampled data.
Battery pack using five Large Copacities lithium battery group parallel powering, each battery pack be have 12 section cells by
Be combined according to the modes of 3 and 4 strings, coordinate the battery management unit of internal proprietary, integrated circuit realize excessively stream, overvoltage, it is under-voltage,
Overcharge with Cross prevention etc..Each battery pack is individually packed using PVC insulating materials, avoids fortuitous event.
As shown in Fig. 2 disclosing a kind of application method of seabed deformation monitoring instrument of the present embodiment, it includes following step
Suddenly：
Step S1, under the deformation monitoring instrument of seabed before water, main controller is connected with outside time service device, main controller is read
The time of the outside time service device so that the time of data acquisition module, clock circuit and the outside time service device when
Between synchronize；
Step S2, under the deformation monitoring instrument of seabed after water, and (pacify when seabed deformation monitoring instrument is kept in motion
In dress), main controller control inclination sensor is in stop working state, after seabed deformation monitoring instrument completes seat bottom (i.e.
Install), main controller controls inclination sensor electrifying startup；
After lower water, main controller disconnects with outside time service device, main controller passage time reference circuit calibration number
According to acquisition module obtain inclination sensor, pressure sensor output data caused by acquisition time.
Specifically, the main controller of seabed deformation monitoring instrument is mainly responsible for the time reading of outside time service device, data
Acquisition control, data storage and reading, the power supply of interface communication and sensor., it is necessary to which external defend after instrument start
Star time service device and clock circuit obtain the accurately time, and the data acquisition module of instrument internal is synchronous with satellite time transfer device
Afterwards, the data collected can all have corresponding time relationship.After satellite time transfer device is lost after the water under instrument, by the low of inside
Temperature drift clock reference circuit checks and approves acquisition time.
Main controller to the power supply and acquisition control of sensor mainly for high sensitivity inclination sensor, to avoid cloth
If rocking and vibrating for process has an impact to sensor, thus inclination sensor when instrument is started shooting not on electricity and collection,
And pressure sensor is unaffected, normally upper electricity can be acquired after instrument start, if having connected underwater acoustic communication set
Words, while the procedures of establishment can be monitored.
The acquisition module plate of seabed deformation monitoring instrument employs high-precision adc integrated chip, will to provide sampling precision
Sample rate is adjusted to minimum.The multiple sensor data collected are grouped and packed by data acquisition module, according to fixed grating
The transmission of the packet of formula to main controller is stored.So all decentralization is to data acquisition module for data acquisition session, effectively
Reduce the burden of main controller.
The signal output of sensor carries out preposition amplification, conditioning and collection.Analog to digital conversion circuit is turned with 32 delta-sigma moduluses
Parallel operation is core, is subject to peripheral auxiliary circuits composition, and can meet will to the record of the sensor signal of 130dB HDRs
Ask.Second order delta-sigma delta modulator, programmable digital filtering extraction, and other controls and interface are included inside analog-digital converter
Circuit, its major parameter are required to be higher by least one magnitude than sensor, and this set helps fully to excavate front end sensing
The potentiality of device.
In view of the complexity of environments such as subsea, the factor such as ocean current, tide, biology, silt all can be to inclination sensor and water
Pressure sensor interferes, and therefore, seabed deformation monitoring instrument preferably can be placed on experiment before hydrate pilot production starts with regard to cloth
Region, proceed by the continuous acquisition of seabed datum of deformation data, so as to fully grasp the ocean currents of normal oceanic environments, tide,
The affecting laws that the factors such as biology, sedimentation deform to seabed, monitoring device record so could be effectively rejected in production
Interference signal, by really abnormal data is discernable as caused by collapsing seabed.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (9)
1. a kind of seabed deformation monitoring instrument of ocean gas hydrate exploitation, it is characterised in that it is fixedly mounted on seabed
It is expected that on the monitoring position of settling zone, it includes main controller, data acquisition module, battery pack, PMU, storage
Device, underwater acoustic communication unit, inclination sensor, pressure sensor, magnetometer, temperature sensor, inertial gyroscope, time reference electricity
Road and clock circuit；Battery pack is connected by PMU with main controller；Data acquisition module, PMU, deposit
Reservoir, underwater acoustic communication unit, magnetometer, temperature sensor, inertial gyroscope, time reference circuit and clock circuit are and master control
Device connects；Inclination sensor and pressure sensor are connected by data acquisition module with main controller；
The main controller, before the water under the seabed deformation monitoring instrument, it is connected with an outside time service device, and read
The time of the outside time service device so that the time of data acquisition module, clock circuit and the outside time service device when
Between it is synchronous；And under the seabed deformation monitoring instrument after water, pass through the time reference circuit calibration data acquisition module
In acquisition time caused by the data that acquisition inclination sensor, pressure sensor export.
2. seabed deformation monitoring instrument as claimed in claim 1, it is characterised in that the main controller is additionally operable to data acquisition
Module, magnetometer, temperature sensor and the data of inertial gyroscope output are preserved to memory.
3. seabed deformation monitoring instrument as claimed in claim 1, it is characterised in that the main controller is additionally operable to data acquisition
Module, magnetometer, temperature sensor and the data of inertial gyroscope output transmit the water to sea by underwater acoustic communication unit
Acoustic communication host computer system.
4. seabed deformation monitoring instrument as claimed in claim 1, it is characterised in that the outside time service device is satellite time transfer
Module.
5. seabed deformation monitoring instrument as claimed in claim 1, it is characterised in that the inclination sensor is Orthogonal Double component
Obliquity sensor.
6. seabed deformation monitoring instrument as claimed in claim 1, it is characterised in that when the time reference circuit is Low Drift Temperature
Between reference circuit.
7. seabed deformation monitoring instrument as claimed in claim 1, it is characterised in that the clock circuit is crystal oscillator.
8. the application method of the seabed deformation monitoring instrument as described in claim 1-7 any one, it is characterised in that including with
Lower step：
Under the deformation monitoring instrument of seabed before water, main controller is connected with outside time service device, main controller reads the outside and awarded
When device time so that the time of data acquisition module, clock circuit and the time of the outside time service device synchronize；
Under the deformation monitoring instrument of seabed after water, main controller disconnects with outside time service device, main controller passage time benchmark
Circuit calibration data acquisition module obtain inclination sensor, pressure sensor output data caused by acquisition time.
9. application method as claimed in claim 1, it is characterised in that further comprising the steps of：In seabed deformation monitoring instrument
After lower water, and when seabed deformation monitoring instrument is kept in motion, main controller control inclination sensor is in stop working state,
After seabed deformation monitoring instrument is completed to sit bottom, main controller controls inclination sensor electrifying startup.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710756812.2A CN107607081A (en) | 2017-08-29 | 2017-08-29 | A kind of the seabed deformation monitoring instrument and its application method of gas hydrates exploitation |
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| CN201710756812.2A CN107607081A (en) | 2017-08-29 | 2017-08-29 | A kind of the seabed deformation monitoring instrument and its application method of gas hydrates exploitation |
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Cited By (6)
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| CN110793656A (en) * | 2019-10-23 | 2020-02-14 | 广州海洋地质调查局 | Method for monitoring temperature and pressure of volcano of seabed mud |
| CN111141330A (en) * | 2020-01-08 | 2020-05-12 | 中国海洋大学 | Five-component marine natural gas hydrate intelligent sensing node |
| CN111380505A (en) * | 2018-12-29 | 2020-07-07 | 宁波骏鑫信息科技有限公司 | Inclination detection device, inclination detection system and inclination detection method suitable for scaffold |
| CN112302626A (en) * | 2020-10-29 | 2021-02-02 | 中国华能集团有限公司 | Seabed natural gas hydrate exploitation monitoring system |
| CN112378376A (en) * | 2020-11-09 | 2021-02-19 | 广州海洋地质调查局 | Seabed deformation combined monitoring method based on sensing array and inclinometer |
| CN114136270A (en) * | 2021-12-09 | 2022-03-04 | 中国船舶科学研究中心 | Deck deformation monitoring method based on satellite positioning and inclination angle sensing |
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| CN114136270A (en) * | 2021-12-09 | 2022-03-04 | 中国船舶科学研究中心 | Deck deformation monitoring method based on satellite positioning and inclination angle sensing |
| CN114136270B (en) * | 2021-12-09 | 2024-03-22 | 中国船舶科学研究中心 | Deck deformation monitoring method based on satellite positioning and inclination angle sensing |
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Application publication date: 20180119 |
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| RJ01 | Rejection of invention patent application after publication |