CN110206538A - The armoured fiber optic cable positioning and orientation system of casing and its collecting method - Google Patents
The armoured fiber optic cable positioning and orientation system of casing and its collecting method Download PDFInfo
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- CN110206538A CN110206538A CN201910618067.4A CN201910618067A CN110206538A CN 110206538 A CN110206538 A CN 110206538A CN 201910618067 A CN201910618067 A CN 201910618067A CN 110206538 A CN110206538 A CN 110206538A
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- 239000002184 metal Substances 0.000 claims abstract description 75
- 230000005389 magnetism Effects 0.000 claims description 55
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000000178 monomer Substances 0.000 claims description 19
- 239000004568 cement Substances 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 6
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- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000007769 metal material Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 10
- 239000013307 optical fiber Substances 0.000 description 17
- 229910001220 stainless steel Inorganic materials 0.000 description 11
- 239000010935 stainless steel Substances 0.000 description 11
- 238000005538 encapsulation Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
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- 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
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
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- 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
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
- E21B47/092—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting magnetic anomalies
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Abstract
The present invention provides a kind of armoured fiber optic cable positioning and orientation system of casing and its collecting method, lays special armored fiber optic cable outside metal sleeve；Permanent magnet is equipped with outside the special armored fiber optic cable；Underground magnetic detecting instrument is connect by armoured logging cable with wellhead ground logging truck, and wellhead ground logging truck controls underground magnetic detecting instrument by armoured logging cable；Underground magnetic detecting instrument includes gyroscope, three-component magnetic field sensor.The present invention uses the special armored fiber optic cable with permanent magnet, gyroscope and the specific depth location of three-component magnetic field sensor detection permanent magnet and geographic orientation are used in metal sleeve, so that it is determined that specific depth location and geographic orientation that armored fiber optic cable extends along casing, the permanent special armored fiber optic cable installed with the outside of sleeve guaranteed in straight well, inclined shaft and horizontal well will not break in perforating ejection in perforation.
Description
Technical field
The invention belongs to logging technique fields, and in particular to a kind of armoured fiber optic cable positioning and orientation system of casing and its number
According to acquisition method.
Background technique
Optical fiber sensing technology starts from 1977, develops rapidly with the development of Fibre Optical Communication Technology, and optical fiber passes
Sense technology is to measure the important symbol of a national information degree.Optical fiber sensing technology is widely used in military affairs, national defence, space flight
The fields such as aviation, industrial and mining enterprises, energy environment protection, Industry Control, medical and health, metrology and measurement, building, household electrical appliance have wide
Market.In the world have optical fiber sensing technology hundreds of, such as temperature, pressure, flow, displacement, vibration, rotation, bending, liquid
The physical quantitys such as position, speed, acceleration, sound field, electric current, voltage, magnetic field and radiation all realize the sensing of different performance.
Downhole optic fiber sensor-based system can be used for underground carry out pressure, temperature, noise, vibration, sound wave, seismic wave, flow,
Component analysis, the measurement of electric and magnetic fields.Based on full armored fiber optic cable structure, sensor and connection and data pass the system
Defeated cable is all made of optical fiber.There are many distribution methods of underground armored fiber optic cable at present, for example be placed in underground control pipeline,
It launches in coiled tubing, be directly integrated into coiled tubing tube wall made of composite material, bundled fixed is on the outside of oil pipe, throwing
It is placed in casing and is bundled in outside casing and carry out the permanently distribution methods such as fixed with cementing concrete.
When armored fiber optic cable bundled fixed the outside of sleeve of vertical well, inclined shaft or horizontal well and with cementing concrete it is permanent
After fixation, if to carry out perforating job in Reservoir Section, need to detect specific depth location of the armored fiber optic cable outside casing
And geographic orientation, oriented perforating technology is used in perforation, avoids the armored fiber optic cable outside casing.
Silixa company, Britain utilizes Principles of Acoustics, places one beside armored fiber optic cable and is sent out by battery-driven sound
Raw device, signal is periodically made a sound under the driving of battery, then the head end of armored fiber optic cable is connected to and is placed on well head
Distribution type fiber-optic sound wave senses on (DAS) modulation /demodulation instrument, by measuring the acoustic signals being distributed along underground armored fiber optic cable,
By calculating downhole acoustic generator in the depth location and geographic orientation of underground, it can substantially determine and be placed in downhole acoustic
The specific depth location and geographic orientation of armored fiber optic cable beside generator in underground.
Although Silixa company can substantially determine that underground armored fiber optic cable is sent out in sound using downhole acoustic generator
The specific depth location and geographic orientation of raw device installation point, but have following disadvantage: (1) downhole acoustic generator inside
Limited battery capacity, can only be continuous work 30 days or so, once the electric energy of battery exhausts, downhole acoustic generator will stop immediately
Work.Because downhole acoustic generator and armored fiber optic cable have been fixed on outside casing by cementing concrete is permanent simultaneously, can not
Charged or replaced battery to sound generator, downhole acoustic generator is by eventual failure.Once because underground well cementation or
Completion practice is more than 30 days, then the specific depth location of the armoured fiber optic cable of casing can not be measured using downhole acoustic generator
And geographic orientation；(2) downhole acoustic generator higher cost, if laying intensive sound generator along armored fiber optic cable,
It is too high to will cause downhole equipment cost；(3) if the sound generator along the laying of armored fiber optic cable is very little, although well can be reduced
The overall cost of lower equipment, but the positioning and orientation of the armored fiber optic cable between every two downhole acoustic generator will be gone out
Existing biggish error can not positioning and directing.
Summary of the invention
In order to which the permanent armored fiber optic cable that the outside of sleeve guaranteed in straight well, inclined shaft and horizontal well is installed will not be in perforation
When perforating ejection it is disconnected, need to have measured in advance before implementing oriented perforating the specific depth location of the armoured fiber optic cable of casing with
Geographic orientation provides for oriented perforating operation and keeps away the specific depth and geographical position data of penetrating well section armored fiber optic cable.In view of existing
The shortcomings that some is using the armoured fiber optic cable position of sound generator detection casing and geographic orientation, needs a kind of inexpensive, long
Period, high-precision, the methods and techniques of the specific depth location of the high reliability detection armoured fiber optic cable of casing and geographic orientation.
The invention proposes making armored fiber optic cable using permanent magnetism continuous magnet steel pipe encapsulation single mode or multimode or special optical fiber, or
It places inexpensive permanent magnetism magnet ring or magnetic tube or magnetic sheet or magnetic stripe at regular intervals along armored fiber optic cable, peace is used in casing
Underground magnetic detecting instrument equipped with gyroscope and three-component magnetic field sensor, detection casing use the continuous magnet steel pipe of permanent magnetism outside
The armored fiber optic cable of production places inexpensive permanent magnetism magnet ring or magnetic tube or magnetic sheet at regular intervals along armored fiber optic cable
Or the specific depth location and geographic orientation of magnetic stripe, so that it is determined that the armored fiber optic cable permanently laid outside casing extended along casing
Specific depth location and geographic orientation.
It is a kind of using the continuous magnet steel pipe encapsulation single mode of permanent magnetism the purpose of the present invention is overcoming the deficiencies of the prior art and provide
Or multimode or special optical fiber make armored fiber optic cable, or place inexpensive permanent magnetism at regular intervals along armored fiber optic cable
Magnet ring or magnetic tube or magnetic sheet or magnetic stripe are visited in casing using the underground magnetism for being equipped with gyroscope and three-component magnetic field sensor
Instrument is surveyed, the armored fiber optic cable of the continuous magnet steel pipe production of permanent magnetism is used outside detection casing or along armored fiber optic cable by certain
The specific depth location and geographic orientation of inexpensive permanent magnetism magnet ring or magnetic tube or magnetic sheet or magnetic stripe are placed in interval, so that it is determined that set
The positioning and orientation system of specific depth location and geographic orientation that the outer armored fiber optic cable permanently laid of pipe extends along casing and side
Method.
To achieve the above object, the present invention provides a kind of armoured fiber optic cable positioning and orientation system of casing, including metallic sheath
Pipe, wellhead ground logging truck, underground magnetic detecting instrument；Special armored fiber optic cable is laid outside metal sleeve；The special armour
It fills and is equipped with permanent magnet outside fiber optic cable.
The underground magnetic detecting instrument is connect by armoured logging cable with wellhead ground logging truck, and wellhead ground is surveyed
Well vehicle controls underground magnetic detecting instrument by armoured logging cable；The underground magnetic detecting instrument includes using nonmagnetic
Metal or the high-temperature-resistant high-pressure-resistant shell of composite material manufacture, inside include gyroscope, three-component magnetic field sensor, low frequency signal
Amplification and analog-to-digital conversion module, data memory module and data the spread of the rumours module, data memory module and data the spread of the rumours module, gyro
Instrument is fixed on above three-component magnetic field sensor.
The gyroscope can be mechanical gyroscope electronic gyroscope or fibre optic gyroscope.
The three-component magnetic field sensor can be three mutually orthogonal line of induction ring type magnetic field sensors or three
A mutually orthogonal fluxgate type magnetic field sensor or three mutually orthogonal fibre optic magnetic field sensors.
Amplification and analog-to-digital conversion module, data memory module and data the spread of the rumours module, respectively to gyroscope and three-component magnetic
Field sensor signal amplifies, analog-to-digital conversion, storage and data the spread of the rumours, underground magnetic detecting instrument are synchronized in operation to ground
The gyro data and three-component magnetic field number of control and the acquisition of logger computer system real-time Transmission instrument inside the logging truck of face
According to.
The multi channel signals amplifier of amplification and analog-to-digital conversion module is low noise low-frequency amplifier, multichannel analog-to-digital conversion
Device module is 32 analog-digital converters that sample rate is 4000Hz.Data memory module is multichannel high temperature resistant solid-state memory.
What the special armored fiber optic cable system was made of the continuous magnet steel pipe encapsulation single mode of permanent magnetism or multimode fibre
Special armored fiber optic cable；Alternatively, the special armored fiber optic cable, places permanent magnetism list at regular intervals along armored fiber optic cable
Body, the permanent magnetic monomers include permanent magnetism magnet ring or magnetic tube or magnetic sheet or magnetic stripe.
Armored fiber optic cable is made using the continuous magnetic substance stainless steel tube encapsulation single mode of permanent magnetism or multimode or special optical fiber, or
Person places inexpensive permanent magnetism magnet ring or the small magnetic tube of permanent magnetism at regular intervals along armored fiber optic cable, or in armored fiber optic cable
On according to the fixed semicircle permanent magnetism magnetic links of certain intervals or permanent magnetism magnet steel item, so that armored fiber optic cable is become one has forever
Special armored fiber optic cable that is magnetic long or being fixed with permanent magnetism marker thereon.
It further include endless metal clamp, the endless metal clamp is fixed at metallic sheath shoe, and it is special to protect
Armored fiber optic cable and permanent magnetic monomers are not damaged in setting of casing and well cementing operation.
The collecting method of the armoured fiber optic cable positioning and orientation system of the casing, comprising the following steps:
(a) in the wellhole of metal sleeve slow tripping in finishing drilling synchronous with special armored fiber optic cable；
(b) it is pumped into cement slurry from shaft bottom with high pressure pump truck, makes cement slurry from shaft bottom between metal sleeve outer wall and drilling
Annular space area return to well head, cement slurry consolidation after, metal sleeve, the permanent fixation of special armored fiber optic cable and stratum
Firmly；
(c) first the gyroscope inside the magnetic detecting instrument of underground is demarcated in well head, then by underground magnetic detecting
Instrument slowly transfers to shaft bottom from metal sleeve axis line location；
(d) wellhead ground logging truck issues instruction starting underground magnetic detecting instrument and starts to acquire the three-component appearance of gyroscope
The three-component magnetic field data of state data and three-component magnetic field sensor, while slowly mentioning underground magnetic detecting instrument upwards
It rises；Gyroscope and three-component magnetic field sensor continuously measure the real-time attitude of three-component magnetic field sensor along metal sleeve inner wall
And around metal sleeve a certain range of magnetic field strength variation；It is measured full well section or plan perforated interval metal sleeve is attached
After close Distribution of Magnetic Field, underground magnetic detecting instrument is proposed into well head；
(e) processing of field strength Vector modulation is carried out to the data of three-component magnetic field sensor measurement, the strong vector of most high field refers to
The direction shown is exactly the geographic orientation of permanent magnet on the outside of metal sleeve；The length in underground of armoured logging cable is exactly that measurement is deep
Degree；
The strong vector project of most high field that three-component magnetic field sensor is measured along metal sleeve inner wall to underground survey depth
Get on the well track for spending corresponding gyroscope, it can draw out outer special armored fiber optic cable in the depth location and ground of underground
Manage orientation.
Since the magnetism of underground metal sleeve is substantially in (in the steel of Steel Casing) between casing surfaces externally and internally
Circular ring shape is equally distributed.Special armored fiber optic cable, special armored fiber optic cable are mounted on the outside of Steel Casing, that is, metal sleeve
The armored fiber optic cable of single mode or multimode or special optical fiber is encapsulated with the continuous magnetic substance stainless steel tube of permanent magnetism for one, or along armouring
Permanent magnetism magnet ring or the small magnetic tube of permanent magnetism are placed on fiber optic cable at regular intervals, or according to certain intervals on armored fiber optic cable
Fixed semicircle permanent magnetism magnetic links or permanent magnetism magnet steel item, and the magnetism (magnetic conductivity) of permanent-magnet material is far longer than common steel
When the magnetism of casing, the magnetism around Steel Casing will be no longer substantially uniformly distributed in circular ring shape.It is fixed in outside of sleeve
The position of the armored fiber optic cable of the continuous magnetic substance stainless steel tube packaged fiber of permanent magnetism, or secure in outside of sleeve by between certain
It just will appear ferromagnetism exception every the position for the armored fiber optic cable for having placed permanent magnetism magnet ring or the small magnetic tube of permanent magnetism.
The upper and lower of underground magnetic detecting instrument is assembled with centralizer, guarantees magnetic detecting instrument in underground in operation one
The straight center for being in casing.Gyroscope and three-component magnetic field sensor inside the magnetic detecting instrument of underground is along in casing
Wall continuously measures the variation of a certain range of magnetic field strength of vicinity.The data of three-component magnetic field sensor measurement are carried out
The processing of field strength Vector modulation, the direction of most high field strong vector instruction be exactly outside of sleeve it is fixed be mounted with the continuous magnetic of permanent magnetism
What the depth location and geographic orientation or outside of sleeve of the armored fiber optic cable of matter stainless steel tube packaged fiber were fixed presses one
The depth location and geographic orientation of the armored fiber optic cable of permanent magnetism magnet ring or the small magnetic tube of permanent magnetism are placed in fixed interval.Underground is magnetic
The three-component magnetic field sensor of detection instrument is fixedly arranged above gyroscope, and three-component magnetic field sensor is surveyed along wellbore casing inner wall
The strong vector project of most high field measured is to well corresponding with position (depth) of the three-component magnetic field sensor in underground survey
Lower gyroscope gets on along the track of pit shaft, it can draws out the armoured fiber optic cable of casing in the depth location of underground and geography side
Position.
The armoured fiber optic cable positioning and orientation system of casing provided by the invention and its collecting method, for low cost, long
Period, high-precision, the methods and techniques of the specific depth location of the high reliability detection armoured fiber optic cable of casing and geographic orientation.
The invention proposes making armored fiber optic cable using permanent magnetism continuous magnet steel pipe encapsulation single mode or multimode or special optical fiber, or
It places inexpensive permanent magnetism magnet ring or magnetic tube or magnetic sheet or magnetic stripe at regular intervals along armored fiber optic cable, peace is used in casing
Underground magnetic detecting instrument equipped with gyroscope and three-component magnetic field sensor, detection casing use permanent magnetism magnet steel pipe to encapsulate outside
The armored fiber optic cable of optical fiber fabrication or placed at regular intervals along armored fiber optic cable inexpensive permanent magnetism magnet ring or magnetic tube or
The specific depth location and geographic orientation of magnetic sheet or magnetic stripe, so that it is determined that the armored fiber optic cable permanently laid outside casing prolongs along casing
The specific depth location and geographic orientation stretched.The specific depth of the armoured fiber optic cable of the casing measured in advance before oriented perforating
Position and geographic orientation can provide for oriented perforating operation and keep away the specific depth and geographic orientation number of penetrating well section armored fiber optic cable
According to guarantee that the permanent armored fiber optic cable of the outside of sleeve installation in straight well, inclined shaft and horizontal well will not be penetrated in perforation
Hole ejection is disconnected.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of underground magnetic detecting instrument of the invention.
Fig. 3 is the structural schematic diagram of special armored fiber optic cable and permanent magnet of the invention.
Specific embodiment
The embodiment that the invention will now be described in detail with reference to the accompanying drawings, but they and do not constitute a limitation of the invention, only
It is for example, while by illustrating that advantages of the present invention will become clearer and be readily appreciated that.
There are two types of embodiments for a kind of armoured fiber optic cable positioning and orientation system tool of casing of the present invention, as follows:
Embodiment 1
Such as Fig. 1 and Fig. 2, special armouring light is laid outside the armoured fiber optic cable positioning and orientation system of casing, including metal sleeve 3
Fine cable 1, wellhead ground logging truck 2, underground magnetic detecting instrument 10, the armoured logging cable for connecting underground magnetic detecting instrument 10
4；Gyroscope 5, three-component magnetic field sensor 6 are installed, there are also to gyroscope 5 and three-component inside underground magnetic detecting instrument 10
6 signal of magnetic field sensor amplifies and the module 7 of analog-to-digital conversion, data memory module 8, data the spread of the rumours module 9.Wellhead ground
Armoured logging cable 4 on logging truck 2 controls underground magnetic detecting instrument 10 and its depth location in well.
In order to adapt to the adverse circumstances of underground high temperature and pressure, the fiber optic cable that underground is laid mostly uses unlike material and not
Isostructural armouring is protected the purpose is to enhance the high temperature resistant for optical fiber of going into the well, high pressure resistant, stretch-proof, anti-extrusion and impact resistance
Demonstrate,prove its integrality and patency in underground work.One of more commonly used armouring technology is exactly single or several resistance to
The single mode or multimode or special optical fiber of high temperature are placed into inside the tiny stainless steel tube of sealing and protect.According to down-hole pressure
External force intensity during size and underground work, sometimes in the tiny stainless steel for laying single or several high-temperature resistant optical fibers
Tube outside puts on the stainless steel tube of one or more layers slightly larger diameter, or even winds upper one layer or number again outside several layers of stainless steel tube
Layer armouring wire is to enhance resistance to compression and the impact resistance of armored fiber optic cable.
Embodiment 1 is proposed using the continuous magnetic substance stainless steel tube encapsulation single mode of permanent magnetism or multimode or special optical fiber and is made
Special armored fiber optic cable 1 fabricates encapsulation with the continuous magnetic substance stainless steel strip of permanent magnetism and goes into the well high temperature resistant single mode or multimode
Or the tiny stainless steel tube of special optical fiber, so that the special armored fiber optic cable 1 finally to complete is become a spy with permanent magnetism
Different armored fiber optic cable.The underground magnetic detecting for being equipped with gyroscope 5 and three-component magnetic field sensor 6 is used in metal sleeve 3
Instrument 10, tool of the special armored fiber optic cable 1 that detection metal sleeve 3 is made of permanent magnetism magnet steel pipe outside outside metal sleeve 3
Body depth location and geographic orientation, so that it is determined that the special armored fiber optic cable 1 permanently laid outside metal sleeve 3 is along metal sleeve 3
The specific depth location and geographic orientation extended.
Wellhead ground logging truck 2 and underground magnetic detecting instrument 10 are connected by armoured logging cable 4.Underground magnetic detecting
Instrument 10 synchronizes the control and the acquisition of logger computer system real-time Transmission instrument to 2 the inside of wellhead ground logging truck in operation
Three-component gyro data and three-component magnetic field data.
The gyroscope 5 can be mechanical gyroscope electronic gyroscope or fibre optic gyroscope.
The three-component magnetic field sensor 6 can be three mutually orthogonal line of induction ring type magnetic field sensors, either
Three mutually orthogonal fluxgate type magnetic field sensors or three mutually orthogonal fibre optic magnetic field sensors.
Since the magnetism of underground metal sleeve 3 is substantially in (in the steel of Steel Casing) between casing surfaces externally and internally
Circular ring shape is equally distributed.When being mounted with a special armored fiber optic cable 1 for having permanent magnet on the outside of metal sleeve 3, due to
The magnetism (magnetic conductivity) of permanent-magnet material is far longer than the magnetism of the metal sleeve 3 of common steel, the magnetic field around metal sleeve 3 point
Cloth will be no longer substantially uniformly distributed in circular ring shape, and the special armouring light with permanent magnet is secured on the outside of metal sleeve 3
The position of fine cable 1 just will appear ferromagnetism exception.
The upper and lower of underground magnetic detecting instrument 10 is assembled with centralizer, guarantees magnetic detecting instrument 10 in underground in operation
When be constantly in the center of casing.6 edge of gyroscope 5 and three-component magnetic field sensor of 10 the inside of underground magnetic detecting instrument
Internal surface of sleeve pipe continuously measure a certain range of magnetic field around the real-time attitude and metal sleeve 3 of three-component magnetic field sensor 6
The variation of intensity.The processing of field strength Vector modulation is carried out to the data that three-component magnetic field sensor 6 measures, the strong vector of most high field refers to
The direction shown is exactly the geographic orientation for being mounted with the special armored fiber optic cable 1 with permanent magnet fixed on the outside of metal sleeve 3.This
When length of the armoured logging cable 4 in underground be exactly fathoming for permanent magnet.The three-component magnetic of underground magnetic detecting instrument 10
Field sensor 6 is fixedly arranged above gyroscope 5, and the most high field that three-component magnetic field sensor 6 is measured along wellbore casing inner wall is strong
Vector project is to corresponding with position, that is, depth of the three-component magnetic field sensor 6 in underground survey underground gyroscope 5 along well
Get on the track of cylinder, it can draw out outside metal sleeve 3 special armored fiber optic cable 1 in the depth location of underground and geography side
Position.
Embodiment 2
Such as Fig. 1 and Fig. 3, special armouring light is laid outside the armoured fiber optic cable positioning and orientation system of casing, including metal sleeve 3
Fine cable 1, wellhead ground logging truck 2, underground magnetic detecting instrument 10；Underground magnetic detecting instrument 10 passes through armoured logging cable 4
It is connect with wellhead ground logging truck 2；Include gyroscope 5 inside underground magnetic detecting instrument 10, three-component magnetic field sensor 6, put
Big and analog-to-digital conversion module 7, data memory module 8, data the spread of the rumours module 9.It further include being fixed on outside special armored fiber optic cable 1
Permanent magnetic monomers 11,
It further include endless metal clamp 12, the endless metal clamp 12 is fixed at 3 boots of metal sleeve, protection
Special armored fiber optic cable 1 and permanent magnetic monomers 11 are not damaged in setting of casing and well cementing operation.
Embodiment 2 is proposed places permanent magnetic monomers 11 at regular intervals along special armored fiber optic cable 1, and permanent magnetic monomers 11 are
Inexpensive permanent magnetism magnet ring or the small magnetic tube of permanent magnetism, or according to the fixed semicircle of certain intervals on special armored fiber optic cable 1
Permanent magnetism magnetic links or permanent magnetism magnet steel item, make special armored fiber optic cable 1 become the spy for being fixed with permanent magnetism marker
Different armored fiber optic cable.The underground magnetic detecting for being equipped with gyroscope 5 and three-component magnetic field sensor 6 is used in metal sleeve 3
Instrument 10, detection metal sleeve 3 have specific depth location and the geography side of the special armored fiber optic cable 1 of permanent magnetic monomers 11 outside
Position, so that it is determined that specific depth location and geographic orientation that special armored fiber optic cable 1 extends along metal sleeve 3.
The hundreds of continuous metal casings 3 long to thousands of rice in underground are by arriving several hundred root long degree at 10 meters or so tens
Metal sleeve, which is continuously transferred in wellhole, to be realized.Every root long degree has diameter to be slightly larger than 10 meters or so of metal sleeve bottom
The casing shoe of metal sleeve 3 for the head and the tail of two metal sleeves 3 are fixed together, while guaranteeing two metallic sheaths up and down
Pipe 3 is the phenomenon that docking point is not in eccentric or misalignment.In order to protect special armored fiber optic cable 1 will not and metal sleeve
It is worn badly or is squeezed at the position of casing shoe in 3 operation process gone into the well simultaneously and break or sever, in every metal sleeve
An endless metal clamp 12 is fixed in installation on the position of boots, for protecting the spy passed through at casing shoe position outside metal sleeve 3
Different armored fiber optic cable 1 is not damaged.At this point it is possible to which the permanent magnetic monomers 11 of special 1 outside of armored fiber optic cable are all fixed on casing
12 the inside of endless metal clamp on the outside of boots, it is ensured that permanent magnetic monomers 11, it will not be when being put with metal sleeve 3 toward underground
Fallen by scratch.
When the metallic sheath for the special armored fiber optic cable 1 for being fixed with permanent magnetic monomers 11 being deployed to straight well, inclined shaft or horizontal well
It is permanently fixed together on the outside of pipe 3 and with cementing concrete the special armored fiber optic cable 1 and stratum in metal sleeve 3 and outside
Afterwards, the underground magnetic detecting instrument 10 for being equipped with gyroscope 5 and three-component magnetic field sensor 6 is put into metal sleeve 3, from well
Bottom detects the specific depth location and geographic orientation of the outer permanent magnetic monomers 11 of metal sleeve 3 to well head along 3 inner wall of metal sleeve, thus
Determine specific depth location and geographic orientation that the special armored fiber optic cable 1 permanently laid outside metal sleeve 3 extends along casing.
Using the collecting method of the armoured fiber optic cable positioning and orientation system of above-mentioned casing, comprising the following steps:
A, special armored fiber optic cable 1 is made using the continuous magnet steel pipe encapsulation single mode of permanent magnetism or multimode or special optical fiber,
Or place permanent magnetic monomers 11 at regular intervals along armored fiber optic cable, permanent magnetic monomers 11 are permanent magnetism magnet ring or magnetic tube or magnetic sheet
Or the special armored fiber optic cable 1 with permanent magnetism mark is made in magnetic stripe, permanent magnetic monomers 11 are spaced in 10 meters or so；
B, special armored fiber optic cable 1 tripping in synchronous while slow with metal sleeve 3 for being fixed on 3 outside of metal sleeve
In the wellhole of finishing drilling；
C, the fixed endless metal for protecting special armored fiber optic cable and permanent magnetic monomers 11 is installed at each metallic sheath shoe
Clamp 12；
D, it is pumped into cement slurry from shaft bottom with high pressure pump truck, makes cement slurry from shaft bottom between 3 outer wall of metal sleeve and drilling
Annular space area return to well head, cement slurry consolidation after, it is just that metal sleeve 3, special armored fiber optic cable 1 and stratum is permanent solid
It is scheduled on together；
E, it is first demarcated in gyroscope 5 of the well head to 10 the inside of underground magnetic detecting instrument that will be put into well, so
Underground magnetic detecting instrument 10 is slowly transferred into shaft bottom afterwards.In underground, the upper and lower of magnetic detecting instrument 10 all installs righting
Device guarantees that underground magnetic detecting instrument 10 is constantly in the center of casing in operation；
F, the wellhead ground logging truck 2 near well head acquires top issuing instruction starting underground magnetic detecting instrument 10
The three-component attitude data and three-component magnetic field data of spiral shell instrument, while slowly carrying underground magnetic detecting instrument 10 upwards.
The gyroscope 5 and three-component magnetic field sensor 6 of 10 the inside of underground magnetic detecting instrument continuously measure three-component along internal surface of sleeve pipe
The variation of a certain range of magnetic field strength of real-time attitude and vicinity of magnetic field sensor.It is measured full well section or plan
After Distribution of Magnetic Field near perforated interval metal sleeve 3, underground magnetic detecting instrument 10 is proposed into well head；
G, the processing of field strength Vector modulation is carried out to the data that three-component magnetic field sensor 6 measures, the strong vector of most high field refers to
The direction shown is exactly the geographic orientation of the fixed special armored fiber optic cable 1 with permanent magnet on the outside of metal sleeve 3.Armouring is surveyed at this time
Length of the well cable 4 in underground is exactly fathoming for permanent magnet.The three-component magnetic field sensor 6 of underground magnetic detecting instrument 10
It is fixedly arranged above gyroscope 5, three-component magnetic field sensor 6 is arrived along the strong vector project of most high field that wellbore casing inner wall measures
Underground corresponding with depth of the three-component magnetic field sensor 6 in underground survey gyroscope 5 gets on along the track of pit shaft,
Depth location and geographic orientation of the special armored fiber optic cable 1 in underground outside of metal sleeve 3 can be drawn out.
Claims (6)
1. the armoured fiber optic cable positioning and orientation system of casing, which is characterized in that including metal sleeve (3), wellhead ground logging truck
(2), underground magnetic detecting instrument (10)；Metal sleeve (3) lays special armored fiber optic cable (1) outside；The special armouring light
Permanent magnet is equipped with outside fine cable (1)；
The underground magnetic detecting instrument (10) is connect by armoured logging cable (4) with wellhead ground logging truck (2), well head
Ground logging truck (2) passes through armoured logging cable (4) control underground magnetic detecting instrument (10)；
The underground magnetic detecting instrument (10) includes the high-temperature-resistant high-pressure-resistant manufactured using nonmagnetic metal or composite material
Shell, inside include gyroscope (5), three-component magnetic field sensor (6), amplification and analog-to-digital conversion module (7), data memory module
(8) it is fixed on above three-component magnetic field sensor (6) with data the spread of the rumours module (9), gyroscope (5).
2. the armoured fiber optic cable positioning and orientation system of casing according to claim 1, which is characterized in that the special armour
The permanent magnet filled outside the armored fiber optic cable of fiber optic cable (1) uses the continuous magnet steel pipe of permanent magnetism.
3. the armoured fiber optic cable positioning and orientation system of casing according to claim 1, which is characterized in that the special armour
Filling the permanent magnet of fiber optic cable (1) outside is permanent magnetic monomers (11), places permanent magnetic monomers (11) at regular intervals along armored fiber optic cable,
The permanent magnetic monomers (11) include permanent magnetism magnet ring or magnetic tube or magnetic sheet or magnetic stripe.
4. the armoured fiber optic cable positioning and orientation system of casing according to claim 3, which is characterized in that further include annular gold
Belong to clamp (12), the endless metal clamp (12) is fixed at metal sleeve (3) boots, protects special armored fiber optic cable
(1) and permanent magnetic monomers (11).
5. the armoured fiber optic cable positioning and orientation system of casing according to claim 1, which is characterized in that the three-component
Magnetic field sensor (6) is three mutually orthogonal line of induction ring type magnetic field sensors, or is three mutually orthogonal fluxgates
Formula magnetic field sensor or three mutually orthogonal fibre optic magnetic field sensors.
6. according to claim 1 to the collecting method of 5 described in any item armoured fiber optic cable positioning and orientation systems of casing,
Characterized by comprising the following steps:
(1) in the wellhole of metal sleeve (3) slow tripping in finishing drilling synchronous with special armored fiber optic cable (1)；
(2) it is pumped into cement slurry from shaft bottom with high pressure pump truck, makes cement slurry from shaft bottom between metal sleeve (3) outer wall and drilling
Annular space area returns to well head, after cement slurry consolidates, metal sleeve (3), special armored fiber optic cable (1) and stratum is permanent solid
It is scheduled on together；
(3) first the gyroscope (5) inside underground magnetic detecting instrument (10) is demarcated in well head, then visits underground magnetism
It surveys instrument (10) and slowly transfers to shaft bottom from metal sleeve (3) axis line location；
(4) wellhead ground logging truck (2) issues instruction starting underground magnetic detecting instrument (10) and starts to acquire the three of gyroscope (5)
The three-component magnetic field data of component attitude data and three-component magnetic field sensor (6), while slowly by underground magnetic detecting instrument
Device (10) is lifted up；Gyroscope (5) and three-component magnetic field sensor (6) continuously measure three points along metal sleeve (3) inner wall
Measure the variation of a certain range of magnetic field strength around the real-time attitude and metal sleeve (3) of magnetic field sensor (6)；It is measured
After Distribution of Magnetic Field near full well section or plan perforated interval metal sleeve, underground magnetic detecting instrument (10) is proposed into well head；
(5) processing of field strength Vector modulation, the strong vector instruction of most high field are carried out to the data of three-component magnetic field sensor (6) measurement
Direction be exactly fixed permanent magnet on the outside of metal sleeve (3) geographic orientation；The length in underground of armoured logging cable (4)
Exactly fathom；
Three-component magnetic field sensor (6) is arrived along the strong vector project of most high field that metal sleeve (3) inner wall measures and underground survey
Get on the well track of the corresponding gyroscope of depth (5), it can draw special armored fiber optic cable (1) in the depth location of underground
And geographic orientation.
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| CN110529103A (en) * | 2019-10-10 | 2019-12-03 | 中油奥博(成都)科技有限公司 | The armoured optical cable orientation system of the casing of built-in controllable sound source and collecting method |
| CN110965984A (en) * | 2019-10-23 | 2020-04-07 | 电子科技大学 | Downhole testing optical cable and downhole testing method thereof |
| CN111648762A (en) * | 2020-07-09 | 2020-09-11 | 中油奥博(成都)科技有限公司 | Special distributed armored optical cable for underground long-term dynamic monitoring and monitoring system and method |
| CN112031744A (en) * | 2020-09-29 | 2020-12-04 | 中国石油天然气集团有限公司 | Underground optical fiber flow measuring device, system and method |
| CN112814646A (en) * | 2019-10-31 | 2021-05-18 | 中国石油化工股份有限公司 | Oil-water well pipe external channeling distributed optical fiber detection simulation device and use method thereof |
| CN114856550A (en) * | 2022-05-11 | 2022-08-05 | 西南石油大学 | Device and method for accurately positioning petroleum casing pipe based on geomagnetic anomaly marker |
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| CN110529103A (en) * | 2019-10-10 | 2019-12-03 | 中油奥博(成都)科技有限公司 | The armoured optical cable orientation system of the casing of built-in controllable sound source and collecting method |
| CN110529103B (en) * | 2019-10-10 | 2024-04-05 | 中油奥博(成都)科技有限公司 | External-sleeve armored optical cable orientation system with built-in controllable sound source and data acquisition method |
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| CN111648762B (en) * | 2020-07-09 | 2023-09-08 | 中油奥博(成都)科技有限公司 | Underground long-term dynamic monitoring special distributed armored optical cable and monitoring system and method |
| CN112031744A (en) * | 2020-09-29 | 2020-12-04 | 中国石油天然气集团有限公司 | Underground optical fiber flow measuring device, system and method |
| CN114856550A (en) * | 2022-05-11 | 2022-08-05 | 西南石油大学 | Device and method for accurately positioning petroleum casing pipe based on geomagnetic anomaly marker |
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Application publication date: 20190906 |