CN104596686B - Drilling type three-dimensional ground stress monitoring sensing device based on optical fiber sensing technology - Google Patents
Drilling type three-dimensional ground stress monitoring sensing device based on optical fiber sensing technology Download PDFInfo
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- CN104596686B CN104596686B CN201510014775.9A CN201510014775A CN104596686B CN 104596686 B CN104596686 B CN 104596686B CN 201510014775 A CN201510014775 A CN 201510014775A CN 104596686 B CN104596686 B CN 104596686B
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Abstract
The invention discloses a drilling type three-dimensional ground stress monitoring sensing device based on an optical fiber sensing technology. The drilling type three-dimensional ground stress monitoring sensing device comprises a high-pressure rubber pipe, a high-pressure rubber connecting pipe, a first three-component probe, a second three-component probe, a third three-component probe and a sending device end, wherein the first three-component probe, the second three-component probe and the third three-component probe are connected through double-thread connectors, the first three-component probe is an axial planar three-component probe, the second three-component probe and the third three-component probe are tangential planar three-component probes having 90-degree angle difference in direction, and the first three-component probe, the second three-component probe and the third three-component probe are each composed of a limiting block, an aluminum alloy base, three single-component sensing chip, a single-component sensing chip support and a sending device protection sleeve. The drilling type three-dimensional ground stress monitoring sensing device can directly at the service of oil and gas resource prospection, earthquake generating fault zone ground stress monitoring and large side slope rock body stress change monitoring, provides energy guarantee and safety for the life of people and has huge social and economic benefits.
Description
Technical field
The present invention relates to sensor field, and in particular to a kind of hole drilling type three-dimensional ground stress based on optical fiber sensing technology is supervised
Survey sensing device.
Background technology
Crustal stress states data be Oil ＆ Gas Resources Exploration, geological disaster research it is pre- with preventing and treating, urban construction, earthquake prediction
The indispensable basic datas in field such as report, slope rock mass stability study, its order of accuarcy directly affects the quality of engineering very
To success or failure.Therefore, geostress survey becomes work indispensable in Human dried bloodstains with monitoring.At present, with China's coal
The various exploitations of mineral resources such as ore deposit, diversion, the exploitation for drawing the heavy constructions such as electricity, reservoir construction, hazards control, exploration of oil and gas field,
The demand of rock mass crustal stress continuous monitoring is surged, reliability also to rock mass in-situ stress monitoring instrument, precision and automation journey
Degree is put forward higher requirement.So that in-situ stress monitoring is in exploration of oil and gas field field as an example, first, crustal stress is oil-gas migration, gathers
One of power of collection, lower the formed Reservoir Fracture of crustal stress effect, tomography and construction are oil-gas migration, the passage of aggregation and field
One of institute, Current stress affects and controls oil, the dynamic change of gas and water in oilfield exploitation procedure.Secondly, by dividing
Analysis crustal stress can study the rule of oil-gas migration and aggregation with the relation in crack, find oil-gas bearing basin.Finally, base area should
The three-dimensional distribution characteristics of power and reservoir lithology parameter, not only can predict the rule that crack extends, and be to formulate rational
Oil and gas field development scheme provides foundation, but also can set up formation pressure sections predicting stablizing for petroleum drilling engineering well
Property.Therefore, crustal stress is oilfield development program design, the analysis of hydraulically created fracture propagation law, formation fracture pressure and stratum
The basic data of caving pressure prediction, the accurate in-situ stress monitoring data of acquisition important reality for oilfield prospecting developing has
Meaning and economic implications.In addition, China is one of most violent continent of tectonic activity in the world, geological disaster takes place frequently, the earth
It is great that internal heat power and plate intermolecular forces directly control volcanic eruption, earthquake, rock burst and mass-sending property landslide etc.
Disaster.Earth interior fine structure and plot mechanics are further appreciated that, the mechanism of crustal stress collection neutralization release is geology
The basis of disaster prewarning and forecasting.Crustal stress changes by China's geology before and after November 14 calendar year 2001 Kun Lun Mountain Ms8.1 special violent earthquakes
Scholar captures, it was demonstrated that earth's surface stress high concentration and accumulation before Kun Lun Mountain violent earthquake, maximum principal stress reaches 12Mpa, after earthquake
Drop to 3-4MPa, Kun Lun Mountain special violent earthquake release stress 2/3.This is to monitor first before and after special violent earthquake in the world in situ
STRESS VARIATION, it was demonstrated that the technology path that the utilization crustal stress change that Professor Li Siguang is proposed predicts an earthquake be it is correct, effectively
's.China once deployed tens tableland stress detectors in the age in last century 60-70, constituted preliminary monitoring net, exploringly
The new way of shake forecast.Many decades are gone over, and the development of geostress survey technology is very fast, and precision is increased substantially, and is realized
Real-time monitoring and remote transmission.Therefore, carry out the real-time stress field monitoring of China, be to carry out geo-hazard early-warning forecast, improve
Prediction ability and precision, effectively mitigate the loss that geological disaster is caused.
At present the in-situ stress monitoring technology of comparative maturity mainly have volume type monitoring instrument, condenser type component monitoring instrument and
Piezomagnetic component monitoring instrument, yet with being limited by bore position and wellbore depth and instrument is long at high temperature under high pressure
Phase working stability sex chromosome mosaicism, traditional electricity monitoring instrument is using being restricted.For existing electrically stress monitoring instrument
The deficiency that device is present, the present invention develops three-dimensional ground stress monitoring sensing device using optical fiber sensing technology.Optical fiber sensing technology is
One emerging, multi-crossed disciplines high-tech application technology, relative to traditional sensors, fiber-optic grating sensor has sensitive
Degree height, fast response time, corrosion-resistant, small volume, life-span length, passivity, electromagnetism interference, with distributed measurement ability, just
The advantages of telemetry network is constituted with fibre-optic transmission system (FOTS), the long term monitoring being highly suitable under adverse circumstances becomes most
The substitute of the electrical sensor of development prospect.
The content of the invention
To solve the above problems, the invention provides a kind of hole drilling type three-dimensional ground stress based on optical fiber sensing technology is monitored
Sensing device.
For achieving the above object, the technical scheme taken of the present invention is：
Hole drilling type three-dimensional ground stress based on optical fiber sensing technology monitors sensing device, including high-pressure rubber hose, high pressure rubber
Gemel connection pipe, the first three-component probe, the second three-component probe, the 3rd three-component probe and sensing device termination, the one or three point
Amount probe, the second three-component probe, the 3rd three-component probe are connected by double thread connector, and are limited by limited block respective
Relative position, the first three-component probe for axial plane three-component probe, the second three-component probe, the 3rd three-component pop one's head in is
Direction differs the tangential plane three-component probe at 90 ° of angles, and the first three-component probe, the second three-component probe, the 3rd three-component are visited
Head is by limited block, aluminium alloy pedestal, three simple component sensing chips, simple component sensing chip support and sensing device protective cases
Pipe is constituted, and the quantity of simple component sensing chip support is three, is opened on the sensing device protection sleeve pipe in angle, three
Simple component sensing chip is arranged in series on the simple component sensing chip support by optical fiber, and the aluminium of the top is closed
Auri seat upper end is connected with high-pressure rubber hose by high pressure rubber connecting tube, and the aluminium alloy pedestal lower end of bottom is connected with sensing
Device termination, the simple component sensing chip is formed by some carbon fibre composite pieces by epoxy glue layer bonding, institute
The one side for stating carbon fibre composite piece is adhesive with fiber grating, the carbon fibre composite piece and institute by epoxide-resin glue
The thickness for stating epoxy glue layer is identical.
Wherein, described epoxy glue layer adopts high-temperature-resistant epoxy resin.
Wherein, described angle is 60 ° or 45 °.
Wherein, described fiber grating is the single-mode fiber that external diameter is 0.125mm, and reflectivity is approximately 100%, 3dB bands
A width of 1.068nm.
Wherein, described simple component sensing chip is wrapped with metal sleeve.
The invention has the advantages that：
Oil ＆ Gas Resources Exploration, Triggering seismic fault band in-situ stress monitoring, large-scale stresses in rock slope can be directly served in change
Monitoring, the life for people provides energy safeguard, safety, and its social agency, economic benefit are huge.
Description of the drawings
Fig. 1 is that a kind of hole drilling type three-dimensional ground stress based on optical fiber sensing technology of the embodiment of the present invention monitors sensing device
Exploded view.
Fig. 2 is the internal structure schematic diagram of simple component sensing chip in Fig. 1.
Fig. 3 is the structural representation after the encapsulation of simple component sensing chip.
Fig. 4 is three-dimensional ground stress sensing device test system schematic diagram
Specific embodiment
In order that objects and advantages of the present invention become more apparent, the present invention is carried out further with reference to embodiments
Describe in detail.It should be appreciated that specific embodiment described herein is not used to limit this only to explain the present invention
It is bright.
As Figure 1-3, a kind of hole drilling type three-dimensional ground stress based on optical fiber sensing technology is embodiments provided
Monitoring sensing device, including high-pressure rubber hose 1, high pressure rubber connecting tube 2, the first three-component probe the 9, second three-component probe
10th, the 3rd three-component probe 11 and sensing device termination 8, the first three-component the 9, second three-component of probe is popped one's head in the 10, the 3rd 3 point
Amount probe 11 is connected by double thread connector 12, and limits respective relative position by limited block 13, and the first three-component is visited
9 is axial plane three-component probe, and the second three-component the 10, the 3rd three-component probe 11 of popping one's head in is that direction differs cutting for 90 ° of angles
To plane three-component probe, the first three-component pops one's head in the 9, second three-component probe the 10, the 3rd three-component probe 11 by limited block
13rd, 6, three simple component sensing chips 5 of aluminium alloy pedestal, the simple component sensing chip support 7 and sensing device protection structure of sleeve pipe 4
Into the quantity of simple component sensing chip support 7 is three, is opened on the sensing device protection sleeve pipe 4 in angle, three lists
Component sensing chip 5 is arranged in series on the simple component sensing chip support 7 by optical fiber 3, the aluminium of the top
The upper end of alloy pedestal 6 is connected with high-pressure rubber hose 1, the lower end of aluminium alloy pedestal 6 connection of bottom by high pressure rubber connecting tube 2
There is sensing device termination 8, the simple component sensing chip 5 passes through epoxy glue layer 51 by some carbon fibre composite pieces 50
Bonding is formed, and the one side of the carbon fibre composite piece 50 is adhesive with fiber grating 52 by epoxide-resin glue, and the carbon is fine
Dimension composite material sheet 50 is identical with the thickness of the epoxy glue layer 51.
Described epoxy glue layer adopts high-temperature-resistant epoxy resin.
Described angle is 60 ° or 45 °.
Described fiber grating 52 is the single-mode fiber that external diameter is 0.125mm, and reflectivity is approximately 100%, and three dB bandwidth is
1.068nm。
Described simple component sensing chip 5 is wrapped with metal sleeve.
Wherein, the manufacture craft of pure stress strain sensing chip 5 is：First, carbon fibre composite is cut into very
Many flakelets, the size per piece is 10 × 10mm2, using epoxide-resin glue by the piecemeal bonding of carbon fibre composite piece
Together, and guarantee that the thickness of epoxide-resin glue is equal to the thickness of every carbon fibre composite piece.Then epoxy resin is used
FBG is pasted along the z-axis direction glue the one side in carbon fiber composite structure.FBG stress sensing chips are as shown in Figure 4.FBG is
External diameter is the single-mode fiber of 0.125mm, and the reflectivity of FBG is approximately 100%, and three dB bandwidth is 1.068nm.Due to ess-strain
Sensing chip is that its wavelength occurs respective change when being acted on by axial strain based on grating, so when strain transducer is made
The impact of transverse strain is avoided, by the stress sensing chip package metal sleeve made so as to only answered by z-axis direction
Power changes.
As shown in figure 4, demodulating system main frame launches optical signal by wideband light source, the signal Jing optical coupler modules of transmitting, then
Jing photoswitches, send to different passages, and Jing optical cables and junction box reach each armouring being located in waiting to log well along transmission channel
The terminal of optical cable-triaxiality sensing device, main frame is passed back by the data message of each sensing device detection crustal stress by optical cable,
The switching of Jing photoswitches, makes the information of different passages highly sensitive, and the photelectric receiver of low noise is received, demodulated device photoelectricity
Conversion, by optical signal electric signal is changed into.The parameter information of stress is through data sampling and processing and is stored, and completes signal and adopts
Collection, is processed, storage, the function such as warning.Stress parameters measured by multiple triaxiality sensing devices, will constitute a stress field
The real-time model of distribution, so as to provide reliable and effectively guarantee for large-scale rock mass engineering project continuous monitoring.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. the hole drilling type three-dimensional ground stress based on optical fiber sensing technology monitors sensing device, it is characterised in that including high pressure rubber
Pipe (1), high pressure rubber connecting tube (2), the first three-component probe (9), the second three-component probe (10), the 3rd three-component probe
(11) and sensing device termination (8), the first three-component probe (9), the second three-component probe (10), the 3rd three-component probe (11)
It is connected by double thread connector (12), and respective relative position, the first three-component probe (9) is limited by limited block (13)
For axial plane three-component probe, the second three-component probe (10), the 3rd three-component probe (11) are cut for direction 90 ° of angles of difference
To plane three-component probe, the first three-component probe (9), the second three-component probe (10), the 3rd three-component probe (11) by
Limited block (13), aluminium alloy pedestal (6), three simple component sensing chips (5), simple component sensing chip support (7) and sensing dresses
Put protection sleeve pipe (4) to constitute, the quantity of simple component sensing chip support (7) is three, and in angle the sensing device is opened in
In protection sleeve pipe (4), three simple component sensing chips (5) are passed in series by optical fiber (3) installed in the simple component
On sense chip support (7), aluminium alloy pedestal (6) upper end of the top is connected with high pressure rubber by high pressure rubber connecting tube (2)
Pipe (1), aluminium alloy pedestal (6) lower end of bottom is connected with sensing device termination (8), the simple component sensing chip (5) by
Some carbon fibre composite pieces (50) are formed by epoxy glue layer (51) bonding, the carbon fibre composite piece (50)
One side fiber grating (52), the carbon fibre composite piece (50) and the epoxy resin are adhesive with by epoxide-resin glue
The thickness of glue-line (51) is identical.
2. the hole drilling type three-dimensional ground stress based on optical fiber sensing technology according to claim 1 monitors sensing device, and it is special
Levy and be, described epoxy glue layer adopts high-temperature-resistant epoxy resin.
3. the hole drilling type three-dimensional ground stress based on optical fiber sensing technology according to claim 1 monitors sensing device, and it is special
Levy and be, described angle is 60 ° or 45 °.
4. the hole drilling type three-dimensional ground stress based on optical fiber sensing technology according to claim 1 monitors sensing device, and it is special
Levy and be, described fiber grating (52) is the single-mode fiber that external diameter is 0.125mm, and reflectivity is approximately 100%, three dB bandwidth
For 1.068nm.
5. the hole drilling type three-dimensional ground stress based on optical fiber sensing technology according to claim 1 monitors sensing device, and it is special
Levy and be, described simple component sensing chip (5) is wrapped with metal sleeve.
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106644203B (en) * | 2016-11-24 | 2019-02-19 | 中国科学院武汉岩土力学研究所 | A kind of stress sensitive element based on three-dimensional fiber crustal stress sensor |
| CN106996841B (en) * | 2017-05-27 | 2022-11-22 | 吉林大学 | Drilling type optical fiber three-dimensional ground stress observation device with self-consistent function |
| CN113738332A (en) * | 2021-10-12 | 2021-12-03 | 李启国 | Horizontal well fracturing device and fracturing method |
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| CN101397904A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring downhole casing strain by using optical fibre sensor |
| CN103105251A (en) * | 2013-01-23 | 2013-05-15 | 杭州珏光物联网科技有限公司 | Optical fiber grating three-dimensional pressure sensor |
| CN103512687A (en) * | 2013-10-22 | 2014-01-15 | 国网电力科学研究院 | Optical fiber reinforcement meter |
| CN203587254U (en) * | 2013-09-22 | 2014-05-07 | 济南科泰测控技术有限公司 | Three-dimensional fiber grating sensor |
| CN204085751U (en) * | 2014-10-13 | 2015-01-07 | 中国科学院武汉岩土力学研究所 | Rock mass engineering project single hole multiple spot fiber grating hollow inclusion triaxiality proving installation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8567265B2 (en) * | 2006-06-09 | 2013-10-29 | Endosense, SA | Triaxial fiber optic force sensing catheter |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397904A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring downhole casing strain by using optical fibre sensor |
| CN103105251A (en) * | 2013-01-23 | 2013-05-15 | 杭州珏光物联网科技有限公司 | Optical fiber grating three-dimensional pressure sensor |
| CN203587254U (en) * | 2013-09-22 | 2014-05-07 | 济南科泰测控技术有限公司 | Three-dimensional fiber grating sensor |
| CN103512687A (en) * | 2013-10-22 | 2014-01-15 | 国网电力科学研究院 | Optical fiber reinforcement meter |
| CN204085751U (en) * | 2014-10-13 | 2015-01-07 | 中国科学院武汉岩土力学研究所 | Rock mass engineering project single hole multiple spot fiber grating hollow inclusion triaxiality proving installation |
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