CN109209349A - A kind of CBM Fracturing horizontal well multiple spot monitoring system - Google Patents
A kind of CBM Fracturing horizontal well multiple spot monitoring system Download PDFInfo
- Publication number
- CN109209349A CN109209349A CN201810973006.5A CN201810973006A CN109209349A CN 109209349 A CN109209349 A CN 109209349A CN 201810973006 A CN201810973006 A CN 201810973006A CN 109209349 A CN109209349 A CN 109209349A
- Authority
- CN
- China
- Prior art keywords
- pressure
- horizontal well
- multiple spot
- monitoring system
- fibre optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 106
- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 239000013307 optical fiber Substances 0.000 claims abstract description 50
- 238000001228 spectrum Methods 0.000 claims abstract description 26
- 230000003595 spectral effect Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 239000007767 bonding agent Substances 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000538562 Banjos Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
- E21B47/135—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Remote Sensing (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Electromagnetism (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of CBM Fracturing horizontal well multiple spot monitoring systems, including multiple fibre optical sensors, armored fiber optic, positioned at the spectrum (FBG) demodulator and computer on ground；Fibre optical sensor is transferred in pressure break horizontal well at the position to be monitored of different sections with armored fiber optic, and fibre optical sensor connects spectrum (FBG) demodulator by armored fiber optic；Spectrum (FBG) demodulator sends scanning laser to fibre optical sensor by armored fiber optic, and reception optical fiber sensor is being reflected back, reflection laser that carry temperature and pressure information, and parses spectral digital signal from reflection laser and be sent to computer；Computer calculates the temperature and pressure value at each fibre optical sensor position in underground according to spectral digital signal.CBM Fracturing horizontal well multiple spot monitoring system provided by the present application does not need setting downhole electronics, and small in size, high temperature high voltage resistant, strong antijamming capability can monitor the pressure and temperature in fractured well shaft bottom steadily in the long term.
Description
Technical field
The present invention relates to fractured well detection technique field, in particular to a kind of CBM Fracturing horizontal well multiple spot monitoring system
System.
Background technique
Down-hole pressure monitors one of main contents as bed gas reservoir dynamic monitoring, implement reservoir effective permeability with
Gas reservoir pressure drop desorption range determines reservoir connection situation, research coal bed gas well mining rule, understands stratum energy situation, guidance
The implementation of gas well stable yields well stimulation improves methane output etc., has very big directive function.Domestic application at present
Pressure test technology mainly has following two categories: irregular pressure monitoring method, the monitoring of permanent type down-hole pressure.
Irregular pressure monitoring method includes: direct-reading manometric technique and memory-type manometric technique, and wherein direct-reading surveys pressure
Technology refers to direct-reading production logging instrument tripping in oil well test interval using cable testing car, passes through ground supply downhole instrument
Power supply, the pressure value that downhole instrument will test are transmitted through the cable to ground well logging instrument and are handled.Memory-type manometric technique
Refer to that using winch wire, pressure gauge from charged pool by powering, by built-in soft by memory-type pressure meter tripping in oil well test interval
Down-hole pressure is detected at the sampling routine of part setting and interval, and measurement data is stored in Instrument memory, is tested
Afterwards, winch wire takes out instrument, reads the data in pressure gauge memory by special-purpose software, and perform corresponding processing.
However, irregularly test causes data to be interrupted, imperfect, data continuity, comparability are poor, are difficult to answer in production practice
With.
The monitoring of permanent type down-hole pressure is to be connected to pressure gauge on flow string to go into the well together, and be placed in underground for a long time,
To the measuring technology of the long-term real-time monitoring of down-hole pressure.The monitoring of permanent type down-hole pressure includes capillary pressure measuring technology etc., capillary
Tube manometer is to will be filled with the dedicated capillary tubing of nitrogen to tie up in flow string lower going-into-well, and down-hole pressure reaches well by capillary
Mouthful, it is measured in well head by high-precision pressure probe and transmitter.The monitoring of permanent type down-hole pressure has long-term measurement, side
Just the characteristics of using, however for complex situations caused by underground underground heat etc., especially for the fractured well for needing operation with high pressure,
It is particularly significant how monitoring device that subsurface environment setting permanently use is adapted to.
Summary of the invention
The problem of in view of the monitoring of prior art fractured well subsurface environment, it is horizontal to propose a kind of CBM Fracturing of the invention
Well multiple spot monitoring system, to overcome the above problem or at least to be partially solved the above problem.
To achieve the goals above, present invention employs following technical solutions:
A kind of CBM Fracturing horizontal well multiple spot monitoring system, including multiple fibre optical sensors, armored fiber optic, be located at ground
Spectrum (FBG) demodulator and computer；
Fibre optical sensor is transferred in pressure break horizontal well at the position to be monitored of different sections with armored fiber optic, fibre optical sensor
Spectrum (FBG) demodulator is connected by armored fiber optic；
Spectrum (FBG) demodulator sends scanning laser to fibre optical sensor by armored fiber optic, and reception optical fiber sensor is reflected back
, reflection laser that carry temperature and pressure information, and parse spectral digital signal from reflection laser and be sent to calculating
Machine；
Computer calculates the temperature and pressure value at each fibre optical sensor position in underground according to spectral digital signal.
Optionally, fibre optical sensor is fiber-optic grating sensor, including the survey press polish grid with the micro- technique write-in optical fiber of laser
With thermometric grating.
Optionally, press polish grid are surveyed to be encapsulated in pressure vessel by high-temperature-resistant high-pressure-resistant material shields.
Optionally, pressure grating and temperature grating are fiber bragg grating, and the base material of fiber bragg grating is
Ni base constant elastic alloy.
Optionally, fiber-optic grating sensor is using pressure texture in differential type.
Optionally, fibre optical sensor is bonded production using the bonding agent of high-temperature-resistant high-pressure-resistant.
Optionally, fibre optical sensor includes: the optical fiber Bragg grating temperature sensor for being connected on the fibre core end of optical fiber
Element and fiber F-P cavity pressure sensor.
Optionally, armored fiber optic is made of the encapsulation of double-layer stainless steel square tube, and multi-core optical fiber is arranged in the stainless steel square of internal layer
In pipe.
Optionally, armored fiber optic fixation is attached on oil pipe column, in oil pipe column tripping in pressure break horizontal well, and armour
Wire rod protector is additionally provided on dress optical fiber.
Optionally, square jacket is also arranged with outside the outer layer stainless steel square tube of armored fiber optic.
In conclusion the beneficial effects of the present invention are:
A kind of CBM Fracturing horizontal well multiple spot monitoring system is provided, multiple fibre optical sensors are set in pressure break horizontal well not
At the position to be detected of section, with the reflection laser that the spectrum (FBG) demodulator parsing fibre optical sensor on ground is passed back, to parse
Spectral digital signal is sent to computer disposal, obtains the temperature and pressure data of underground multiple spot.Since fibre optical sensor is with light
For signal vehicle, setting downhole electronics are not needed, small in size, high temperature high voltage resistant, strong antijamming capability can be steadily in the long term
Monitor the pressure and temperature in pressure break horizontal well shaft bottom.
Detailed description of the invention
Fig. 1 is a kind of CBM Fracturing horizontal well multiple spot monitoring system schematic provided by one embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for describe the application and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in application.
Technical concept of the invention is: providing a kind of CBM Fracturing horizontal well multiple spot monitoring system, multiple optical fiber are arranged
Sensor is passed back at the position to be detected of pressure break horizontal well difference section with the spectrum (FBG) demodulator parsing fibre optical sensor on ground
Reflection laser obtains the temperature and pressure data of underground multiple spot so that parsing spectral digital signal is sent to computer disposal.
Since fibre optical sensor is using light as signal vehicle, setting downhole electronics are not needed, it is small in size, high temperature high voltage resistant, anti-interference
Ability is strong, can monitor the pressure and temperature in pressure break horizontal well shaft bottom steadily in the long term.
Fig. 1 is a kind of CBM Fracturing horizontal well multiple spot monitoring system schematic provided by one embodiment of the present invention.
As shown in Figure 1, a kind of CBM Fracturing horizontal well multiple spot monitoring system, including multiple fibre optical sensors, armouring light
Fine, spectrum (FBG) demodulator and computer positioned at ground.In addition, cooperating the CBM Fracturing horizontal well multiple spot monitoring system, also wrap
Connection spectrum (FBG) demodulator, wideband light source and power supply that wider wave-length coverage laser is provided for spectrum (FBG) demodulator etc. are included, herein
It repeats no more.
Multiple fibre optical sensors are transferred in pressure break horizontal well at the position to be monitored of different sections with armored fiber optic, such as Fig. 1
It is shown, in the down-hole horizontal section of pressure break horizontal well, it is provided with fibre optical sensor at each fracturing section, to monitor each pressure break section
The temperature and pressure information at place is set, reflects down-hole pressure and temperature variations under the normal production status of oil well, is mentioned for exploitation
For reliable environmental data, each fibre optical sensor connects spectrum (FBG) demodulator by armored fiber optic.
Spectrum (FBG) demodulator sends scanning laser to fibre optical sensor by armored fiber optic, and reception optical fiber sensor is reflected back
, reflection laser that carry temperature and pressure information, and parse spectral digital signal from reflection laser and be sent to calculating
Machine.For example, the continuous wavelength scanning laser of 1510nm~1590nm is issued by spectrum (FBG) demodulator in this embodiment illustrated in fig. 1,
Scanning laser is transmitted to the fibre optical sensor of underground by armored fiber optic, and scanning laser is reflected to form instead by fibre optical sensor later
Penetrate laser.Reflection laser passes spectrum (FBG) demodulator back by the pressure and temperature information near carry sensors, along same optical fiber, and
Spectral digital signal is sent to computer by spectrum (FBG) demodulator.
Computer calculates the temperature and pressure value at each fibre optical sensor position in underground according to spectral digital signal.Its
In, demodulating system software is installed in computer, it can be according to reflection meeting at spectral digital signal, such as each fibre optical sensor
Wavelength information etc. calculates the temperature and pressure data at corresponding fibre optical sensor, and database format as needed carries out in fact
When display, storage or long-range send.
Due to fibre optical sensor using light as transmission information medium, by armored fiber optic receive and reflected laser signals just
The monitoring that pressure and temperature can be achieved does not need cooperation fibre optical sensor in underground setting electronic device etc., therefore structure is simple,
Not by the interference of underground complexity harsh environment, Monitoring Performance is reliable and maintenance cost is low.
In some embodiments of the present application, fibre optical sensor is fiber-optic grating sensor, including is write with the micro- technique of laser
Enter the survey press polish grid and thermometric grating of optical fiber.Preferably, the grating for determining spectral wavelength appropriate, with ultraviolet laser technique by light
Fibre core is written in grid, and when pressure and temperature changes, the wavelength of grating changes therewith, so that the laser signal being reflected back occurs
Variation, the demodulating system as a result, including spectrum (FBG) demodulator and computer passes through the variation for determining grating wavelength, to calculate optical fiber light
Pressure and temperature value at gate sensor position.
In some embodiments of the present application, surveys press polish grid and be encapsulated in pressure vessel by high-temperature-resistant high-pressure-resistant material shields.
For example, in order to adapt to underground high temperature and interference, using the above-mentioned survey press polish grid of 320-400 DEG C of heatproof of high molecular material barrier enclosure
In pressure vessel, pressure vessel obtains down-hole pressure.In addition, thermometric grating can also be shielded by same temperature-resistant material, with
Protect thermometric grating not by the interference of down hole problem.
In some embodiments of the present application, pressure grating and temperature grating are fiber bragg grating, optical fiber Bragg
The base material of grating is Ni base constant elastic alloy.Ni base constant elastic alloy is stable with metallographic, hesitation is small and linear stress passes
Sense a little, can be improved sensitivity, range is larger.Its performance indicator are as follows: elastic modulus E≤150GPa, tensile strength reach
100MPa, elastic limit >=1000MPa, HRC reach 40, and playing mould temperature coefficient is (- 50~-90) × 10-6/ DEG C, elastic hysteresis
It is 0.25~0.75%, elastic after effect is 0.5~0.8%.These technical indicators are able to satisfy high temperature, high pressure completely, there is corrosion
The requirement of on-line checking in equal places and adverse circumstances.
In some embodiments of the present application, fiber-optic grating sensor is using pressure texture in differential type.To use temperature
Compensation temperature is sensed on pressure sensing influence, keeps pressure monitoring more accurate.
In some embodiments of the present application, fibre optical sensor is bonded production using the bonding agent of high-temperature-resistant high-pressure-resistant, with
Adapt to the high temperature and high pressure environment of underground.
The above-mentioned fibre optical sensor for double grating formula, in addition, in some other embodiment of the application, fibre optical sensor
It can also be fiber grating/F-P cavity sensor, comprising: the fiber bragg grating temperature for being connected on the fibre core end of optical fiber passes
Sensor component and fiber F-P cavity pressure sensor.Using multi-core optical fiber, the fibre core of every optical fiber connects a sensor, often
Branch sensor is installed on corresponding oil reservoir position, to realize pressure, the temperature test of multiple spot, fiber grating/F-P cavity sensor
Technical parameter is as shown in the table:
1 technical parameter of table
In some embodiments of the present application, in order to guarantee that the application CBM Fracturing horizontal well multiple spot monitoring system works
Stability, for connecting the armored fiber optic of fibre optical sensor and ground spectrum (FBG) demodulator, by double-layer stainless steel square tube encapsulate make
At multi-core optical fiber is arranged in the stainless steel square tube of internal layer.Two to internal multi-core optical fiber may be implemented in double-layer stainless steel square tube
Cascade screen and protection guarantee the accurate stable transmission of laser signal in optical fiber.Moreover, selecting stainless steel square tube as protection optical fiber
Casing, also can be avoided optical fiber and be twisted, avoid generate adverse effect.
In some embodiments of the present application, armored fiber optic fixation is attached on oil pipe column, with oil pipe column tripping in
In pressure break horizontal well, and Wire rod protector is additionally provided on armored fiber optic, to protect process of the optical fiber in lower going-into-well not damaged
It is bad.In addition, being provided with pressure transfering apptss in armouring, the well head injection device of mating armored fiber optic has reached applying for pressure break horizontal well
Work requirement.
In some embodiments of the present application, square jacket is also arranged with outside the outer layer stainless steel square tube of armored fiber optic.
In the present embodiment, the square jacket that outer diameter shape is side length 11mm is provided on the outside of armored fiber optic, inside uses 3/8 English
Very little and 1/4 inch of double-layer stainless steel pipe structure.More fibre cores are placed according to pressure break number of segment and testing requirement, tripping in can be connected with well
More fibre optical sensors, every sensor are placed in corresponding projected depth according to oil reservoir suggestion, may be implemented to multiple designs
The pressure of position, temperature monitoring.Armored fiber optic will be attached on oil pipe column during going into the well and oil pipe column one remove
Enter in well.In order to which reliably armored fiber optic is fixed on oil pipe column, armored fiber optic is protected not damaged during going into the well
Wound protects armored fiber optic not severe by underground using Wire rod protector to resist abrasion and bear biggish external impact force
The damage of environment.
The installation process of the application CBM Fracturing horizontal well multiple spot monitoring system is as follows:
(1) first fibre optical sensor is installed
The steel pipe of first fibre optical sensor lower end is reserved into 10cm, it is urgent with plug；Sensor fiber upper end successively
It is inserted in protective cap, secondary seal pipe and body seal pipe.Sensor upper end optical fiber cuts off outer and inner tube 200mm, leaks out optical fiber
200mm, then 2~3mm of outside protective pipe is cut off, leak out 2~3mm of optical fiber filled layer.It connects after fused fiber splice by optical fiber continued access pipe is each
Head is successively urgent, from primary seal to secondary seal.In operating process, keeps optical fiber straight and do not stress；Sequence arrangement, fixed biography
Optic fibre turning should be avoided in fixation procedure in sensor upper end optical fiber.
(2) tripping in optical fiber installs other sensors
Continue tripping in oil pipe column, and carries out the monitoring of a spectral signal every 100 meters；It is lowered into and sets in oil pipe column
Position is counted, second manometer is installed；It determines that pressure sensor optical fiber cuts off position, cuts off optical fiber；Above mention oil pipe column
To suitable position, first fibre optical sensor and second fibre optical sensor are connected using optical fiber continued access pipe, and is suppressed
Check its sealing performance.It is lowered into design position in oil pipe column, other fibre optical sensors are installed；Pressure is detected after being installed
It counts.
(3) Wire rod protector is installed
Optical fiber will be attached to oil pipe column and and oil pipe column together in lower going-into-well during going into the well.In order to reliable
Optical fiber is fixed on oil pipe column, protect optical fiber not to be damaged during going into the well, using Wire rod protector, it can be with
The wear-resistant and biggish external impact force of receiving, protects damage of the optical fiber not by underground adverse circumstances.
(4) the optical fiber connection at packer is crossed
Optical fiber is truncated, upper end optical fiber is passed through into wire rod packer, makes fibre-optical splice in packer lower part, uses special optic fibre
Optical fiber is attached by connector, and the leakproofness of banjo fixing butt jointing is checked with pressure difference detector, is carried out suppressing verifying with handlance, really
Just whether the leakproofness of the conduction and banjo fixing butt jointing of protecting connection optical fiber well connects ground system afterwards, check sensor signal
Often.
In conclusion present applicant proposes a kind of multiple spot optical fiber type pressure and temperature monitorings for being applicable to pressure break horizontal well
System, including portions such as more fibre optical sensors, steel pipe optical fiber, ground spectrum (FBG) demodulator and computers with demodulating system software
Divide and constitutes.The continuous wavelength scanning laser of 1510nm~1590nm is issued by spectrum (FBG) demodulator, laser is passed by signal optical fibre
It is delivered to the fibre optical sensor of underground, laser reflects to form reflection laser by fibre optical sensor later, and reflection laser will be carried and be sensed
Pressure and temperature information near device passes spectrum (FBG) demodulator back along same optical fiber, and by spectrum (FBG) demodulator by spectral digital signal
It is sent to computer, computer calculates the pressure and temperature value of underground, and database format as needed according to demodulation process
Carry out real-time display, storage or long-range transmission；It is high as base material and high temperature resistant using Ni based alloy in terms of sensor material
The bonding agent of pressure makes high-temperature and high-presure resistent FBG sensor, has high temperature resistant, high pressure resistant, anti-oxidant, corrosion-resistant, elasticity modulus
The features such as constant and coefficient of expansion is small, can adapt to the requirement of underground particular surroundings.
The above description is merely a specific embodiment, under above-mentioned introduction of the invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of the above embodiments.It will be understood by those skilled in the art that above-mentioned tool
Body description only preferably explains that the purpose of the present invention, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of CBM Fracturing horizontal well multiple spot monitoring system, which is characterized in that including multiple fibre optical sensors, armouring light
Fine, spectrum (FBG) demodulator and computer positioned at ground；
The fibre optical sensor is transferred in pressure break horizontal well at the position to be monitored of different sections with the armored fiber optic, the light
Fiber sensor connects the spectrum (FBG) demodulator by the armored fiber optic；
The spectrum (FBG) demodulator sends scanning laser to the fibre optical sensor by the armored fiber optic, and receives the optical fiber
Reflection laser that sensor is reflected back, carrying temperature and pressure information, and spectrum number is parsed from the reflection laser
Word signal is sent to the computer；
The computer calculates the temperature and pressure at each fibre optical sensor position in underground according to the spectral digital signal
Force value.
2. CBM Fracturing horizontal well multiple spot monitoring system according to claim 1, which is characterized in that the Fibre Optical Sensor
Device is fiber-optic grating sensor, including the survey press polish grid and thermometric grating with the micro- technique write-in optical fiber of laser.
3. CBM Fracturing horizontal well multiple spot monitoring system according to claim 2, which is characterized in that the survey press polish grid
It is encapsulated in pressure vessel by high-temperature-resistant high-pressure-resistant material shields.
4. CBM Fracturing horizontal well multiple spot monitoring system according to claim 2, which is characterized in that the pressure grating
It is fiber bragg grating with temperature grating, the base material of the fiber bragg grating is Ni base constant elastic alloy.
5. CBM Fracturing horizontal well multiple spot monitoring system according to claim 2, which is characterized in that the fiber grating
Sensor is using pressure texture in differential type.
6. CBM Fracturing horizontal well multiple spot monitoring system according to claim 2, which is characterized in that the Fibre Optical Sensor
Device is bonded production using the bonding agent of high-temperature-resistant high-pressure-resistant.
7. CBM Fracturing horizontal well multiple spot monitoring system according to claim 1, which is characterized in that the Fibre Optical Sensor
Device includes: the optical fiber Bragg grating temperature sensor element and fiber F-P cavity pressure sensing for being connected on the fibre core end of optical fiber
Element.
8. CBM Fracturing horizontal well multiple spot monitoring system according to claim 1-7, which is characterized in that described
Armored fiber optic is made of the encapsulation of double-layer stainless steel square tube, and multi-core optical fiber is arranged in the stainless steel square tube of internal layer.
9. CBM Fracturing horizontal well multiple spot monitoring system according to claim 8, which is characterized in that the armored fiber optic
Fixation is attached on oil pipe column, in the oil pipe column tripping in pressure break horizontal well, and is also set up on the armored fiber optic
There is Wire rod protector.
10. CBM Fracturing horizontal well multiple spot monitoring system according to claim 9, which is characterized in that the armouring light
Square jacket is also arranged with outside fine outer layer stainless steel square tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810973006.5A CN109209349A (en) | 2018-08-24 | 2018-08-24 | A kind of CBM Fracturing horizontal well multiple spot monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810973006.5A CN109209349A (en) | 2018-08-24 | 2018-08-24 | A kind of CBM Fracturing horizontal well multiple spot monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109209349A true CN109209349A (en) | 2019-01-15 |
Family
ID=64989357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810973006.5A Pending CN109209349A (en) | 2018-08-24 | 2018-08-24 | A kind of CBM Fracturing horizontal well multiple spot monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605881A (en) * | 2021-08-26 | 2021-11-05 | 中油奥博(成都)科技有限公司 | Underground fluid pressure measuring system and method based on continuous grating optical fiber |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201884024U (en) * | 2010-09-28 | 2011-06-29 | 北京品傲光电科技有限公司 | Fiber grating sensor-based system used for monitoring coalbed methane well |
| CN202216902U (en) * | 2011-08-05 | 2012-05-09 | 安徽中科瀚海光电技术发展有限公司 | Distributed laser methane monitoring system |
| CN202451145U (en) * | 2012-01-17 | 2012-09-26 | 北京奥飞搏世技术服务有限公司 | Pressure and temperature monitoring system based on optical fiber sensing for coalbed gas well |
| CN102758605A (en) * | 2011-04-26 | 2012-10-31 | 中国石油化工股份有限公司 | Optical fiber test system fixed in oil well |
| US20170138187A1 (en) * | 2015-11-16 | 2017-05-18 | Baker Hughes Incorporated | Downhole fiber optic measurement of packers during fluid injection operations |
| CN108397187A (en) * | 2018-03-17 | 2018-08-14 | 河南理工大学 | Optical Fiber Sensing Array formula acquisition system for coal-bed gas dynamic pressure measurement |
-
2018
- 2018-08-24 CN CN201810973006.5A patent/CN109209349A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201884024U (en) * | 2010-09-28 | 2011-06-29 | 北京品傲光电科技有限公司 | Fiber grating sensor-based system used for monitoring coalbed methane well |
| CN102758605A (en) * | 2011-04-26 | 2012-10-31 | 中国石油化工股份有限公司 | Optical fiber test system fixed in oil well |
| CN202216902U (en) * | 2011-08-05 | 2012-05-09 | 安徽中科瀚海光电技术发展有限公司 | Distributed laser methane monitoring system |
| CN202451145U (en) * | 2012-01-17 | 2012-09-26 | 北京奥飞搏世技术服务有限公司 | Pressure and temperature monitoring system based on optical fiber sensing for coalbed gas well |
| US20170138187A1 (en) * | 2015-11-16 | 2017-05-18 | Baker Hughes Incorporated | Downhole fiber optic measurement of packers during fluid injection operations |
| CN108397187A (en) * | 2018-03-17 | 2018-08-14 | 河南理工大学 | Optical Fiber Sensing Array formula acquisition system for coal-bed gas dynamic pressure measurement |
Non-Patent Citations (1)
| Title |
|---|
| 王宏亮 等: "高温高压油气井下光纤光栅传感器的应用研究", 《光电子•激光》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605881A (en) * | 2021-08-26 | 2021-11-05 | 中油奥博(成都)科技有限公司 | Underground fluid pressure measuring system and method based on continuous grating optical fiber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10067030B2 (en) | Multifiber interrogation with reflectometry techniques | |
| US10844707B2 (en) | Dual telemetric coiled tubing system | |
| RU2564040C2 (en) | Connection via protective shell of line | |
| US7597142B2 (en) | System and method for sensing a parameter in a wellbore | |
| US8989527B2 (en) | Method and system for determining the location of a fiber optic channel along the length of a fiber optic cable | |
| CN103821507B (en) | Shaft wall distortion distribution type fiber-optic detection method | |
| CA2821583C (en) | System and method for making distributed measurements using fiber optic cable | |
| US10669838B2 (en) | Mechanical integrity test system and method of using same | |
| CN112268642A (en) | Underground stress measuring device and method based on distributed optical fiber sensing | |
| CN111456716A (en) | Underground strain distribution monitoring system and method based on distributed optical fiber sensing | |
| CN107356356A (en) | The fiber grating surrouding rock stress monitoring device and monitoring system of a kind of high-survival rate | |
| CN109209349A (en) | A kind of CBM Fracturing horizontal well multiple spot monitoring system | |
| CN104407375A (en) | Underground probe of earthquake prediction instrument | |
| CN209308680U (en) | A kind of compound logging sensor of optical fiber-electronics | |
| CN107304673A (en) | Oil/gas Well monitors tubing string | |
| EP3910380A1 (en) | Hybrid cable with connecting device | |
| CN102062730B (en) | Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor | |
| CN115388848A (en) | City subway tunnel surrounding rock strain sensor device based on optical fiber sensing | |
| CN203441469U (en) | Flow meter for speed measurement based on optical fiber laser | |
| CN218324841U (en) | Underground temperature and pressure monitoring system based on sapphire optical fiber sensor | |
| CN109555549B (en) | Long pipe shed for high-speed railway tunnel to pass through and stress test method thereof | |
| US20220364460A1 (en) | Optical cable, optical cable monitoring system, and well monitoring method | |
| Wang et al. | Research on Application of Distributed Optical Fiber Sensing Technology in the Safety Monitoring of Pipeline Transportation | |
| CN116399523A (en) | Distributed optical fiber-based salt cavern Chu Haiku shaft leakage monitoring device and method | |
| CN118148624A (en) | Sapphire optical fiber sensor for underground temperature and pressure measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190115 |