CN109613115A - Acoustic detection method for the detection of cementation quality of gas storage well cement protection layer - Google Patents
Acoustic detection method for the detection of cementation quality of gas storage well cement protection layer Download PDFInfo
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- 238000001514 detection method Methods 0.000 title description 26
- 239000011241 protective layer Substances 0.000 claims description 37
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- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- 238000012790 confirmation Methods 0.000 claims description 3
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- 238000006073 displacement reaction Methods 0.000 claims description 3
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- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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Abstract
The present invention provides the sound wave detecting methods that the bonding quality of a kind of pair of gas storage well cement protective layer is detected, hollow hole is set in multiple components are arranged in a shell and cut open in surface of shell corresponding position first, then, arranges a multi-core sheathed cable, later, a ground control system is set.When being detected, using all gas medium in fluid couplant displacement gas storage well bore, and pit shaft inner surface is cleared up；It will be hung in gas storage well under shell and its internal structure；It is demarcated according to the parameter selections comparative test well demarcating file such as pit shaft material, internal diameter and wall thickness, or using comparative test tube field, carries out the confirmation or adjustment of parameter；Ground control system is operated, receives to control emission sensor, long space receiving sensor and the work of short space receiving sensor, ground control system and stores the signal sent back to；Hoist engine is controlled by ground control system, at the uniform velocity to transfer and above propose shell and its internal structure；Ground control system carries out data processing.
Description
Technical field
The present invention relates to a kind of sound wave detecting methods, more particularly, to a kind of outside of gas storage well to storage compressed gas
The sound wave detecting method that the bonding quality of cement protective layer is detected.
Background technique
Gas storage well is the abbreviation of compressed gas well for storage, is vertically to be placed in underground for storing the well formula of compressed gas
Tubular equipment is the Typical Representative of subsurface pressure container, is chiefly used in Compressed Natural Gas Fueling Station, city gas peak shaving storage is matched
It stands and the fields such as industrial gas storage facility.
Its main part is by pit shaft, cement protective layer, wellhead assembly, downhole device, sewage pipe, surface pipe, centralizer
Deng composition.Cement protective layer between gas storage well bore and stratum plays an important role in terms of preventing gas storage well failure, on the one hand
Pit shaft can be fixed, the loosening of pit shaft, play are prevented and is flown out, pit shaft is on the other hand enveloped, prevents stratum corrosive media pair
The corrosion of pit shaft outer wall.For the bonding quality of gas storage well cement protective layer, currently without dedicated detection device, because of its structure
Feature is similar with oil/gas well, can use for reference oil gas well cementing operation quality evaluation logging technique.
In oil/gas well industry, a variety of primary cement evaluation logging techniquies are had been developed that.It is existing according to the difference of logging principle
Some primary cement evaluation logging techniquies can be divided into cementing class and cement acoustic impedance class, and corresponding logging method has sound wave
Amplitude is logged well (CBL), sound width/variable density log (CBL/VDL), attenuation rate cement bond log (CBT), sector cement bonding are surveyed
Well (SBT), cement evaluation log (CET), pulse echo well logging (PET), ring week ultra sonic scanner well logging (CAST) etc..
Gas storage well and oil/gas well function, depth, stratum, in terms of there are many differences: (1) function: storage
Gas well is a kind of storage pressure vessel, and oil/gas well provides the channel of oil-gas migration；(2) depth: gas storage well depth is usually no more than
300m, oil gas well depth is up to thousands of rice to upper myriametre；(3) stratum: shallow stratum geologic structure is simple where gas storage well, without
Naked eye well logging, oil/gas well geologic structure is complicated, need to first carry out the well logging of the naked eyes such as sound wave, electrical method, radioactivity；(4) well cementing operation: storage
Gas well prevents from corroding using the full well section well cementation of building building cement, and oil/gas well is only cemented the well in target zone using oil-well cement, separates oil gas
Water layer prevents from altering slot, and shallow stratum is that free pipe (no cement protective layer) is used for scale；(5) damage mode: gas storage well it is main
Damage mode is corrosion of the stratum media to pit shaft outer wall, and the main damage mode of oil/gas well is borehole fluid to shaft in wall
Corrosion.
Gas storage well cement protective layer bonding quality detection at present generally directlys adopt sound width/variable density log method and sets
It is standby, without considering the difference between gas storage well and oil/gas well, causes detection accuracy and longitudinal resolution low, be not able to satisfy gas storage
The requirement of well cement protective layer bonding quality detection.
Summary of the invention
The present invention provides the sound wave detecting method that the bonding quality of a kind of pair of gas storage well cement protective layer is detected, to
The bonding quality of gas storage well cement protective layer is detected.
In order to achieve the above objectives, it is detected the present invention provides the bonding quality of a kind of pair of gas storage well cement protective layer
Sound wave detecting method comprising following steps:
S1: a hollow cylinder is chosen, the shell that length is 1.7m；
S2: uniformly cutd open at case top 0.8m, at case top 1.4m, at housing bottom set it is multiple vertical
Hollow hole uniformly cuts open on shell between at case top 0.8m with apart from case top 1.4m and sets multiple transverse directions and engrave
Emptying aperture uniformly cuts open on the shell at case top 1.4m between housing bottom and sets multiple lateral hollow holes；
S3: choosing an emission sensor, a long space receiving sensor and a short space receiving sensor, senses in transmitting
The outside of device, short space receiving sensor and long space receiving sensor is arranged a leather bag, wherein and leather bag is annular in shape,
Wall thickness is 3mm, internal diameter 60mm, length 100mm, held inside leather bag silicone oil and its at the top and bottom of be respectively set
One fills oilhole, and emission sensor is used to issue the acoustic signals of 15kHz-20kHz；
S4: will be arranged the setting of the long space receiving sensor after leather bag in housing bottom, will be arranged the short space after leather bag
Receiving sensor is mounted at case top 1.4m, will be arranged the emission sensor after leather bag and is mounted on apart from case top
At 0.8m, wherein in installation process, between emission sensor and short space receiving sensor, short space receiving sensor
Sound insulating material is filled between long space receiving sensor；
One electronic line structure: being fixed on the top of emission sensor by S5, electronic line structure include signal amplifier,
Low-pass filter, mission controller, digital signal processor, coupling transformer, instrument amplifier, bandpass filter, modulus turn
Parallel operation and high speed the spread of the rumours module,
Wherein, low-pass filter is connect with signal amplifier, for carrying out low-pass filtering to the signal received；
Mission controller is connect with emission sensor；
Digital signal processor is connect with mission controller, and the voltage arteries and veins of 0~2000V is issued for controlling mission controller
Rush signal；
Coupling transformer is connect with short space receiving sensor and long space receiving sensor, is passed for receiving to short space
The full-wave train acoustic signals that sensor and long space receiving sensor are sent are coupled；
Instrument amplifier is connect with coupling transformer, and the full-wave train acoustic signals for exporting to coupling transformer are put
Greatly；
Bandpass filter is connect with instrument amplifier；
Analog-digital converter is connect with digital signal processor and bandpass filter；
High speed the spread of the rumours module is connect with digital signal processor；
Full-wave train acoustic signals that digital signal processor exports analog-digital converter, low-pass filter output signal into
Every 64ms data encoding is again later a frame via high speed the spread of the rumours module and uploaded by row data compression；
S6: a collar locator is fixed at case top 0.2m, and is electrically connected collar locator and signal
Amplifier, signal amplifier are used to amplify the box cupling signal of collar locator transmission；
S7: one multi-core sheathed cable of arrangement, wherein multi-core sheathed cable includes a upper end, a lower end and a main body, by it
Main body is wound on a hoist engine, and case top is fixed in lower end and is connect with high speed the spread of the rumours module, for providing electric power, passing
Power transmission signal and drive shell and its internal structure rise and decline；
S8: a ground control system is connect with the upper end of hoist engine and multi-core sheathed cable, for control hoist engine,
Moving distance by measuring multi-core sheathed cable carries out depth localization and carries out subsequent processing to electric signal；
S9: using all gas medium in fluid couplant displacement gas storage well bore, and pit shaft inner surface is carried out clear
Reason；
S10: it will be hung in gas storage well under shell and its internal structure, and guarantee that shell is placed in the middle；
S11: according to the parameter selections comparative test well demarcating file such as pit shaft material, internal diameter and wall thickness, or using to having a competition
Tube field calibration is tested, the confirmation or adjustment of parameter are carried out；
S12: operation ground control system receives biography to control emission sensor, long space receiving sensor and short space
Sense device working, ground control system receive and store the signal sent back to；
S13: hoist engine is controlled by ground control system, at the uniform velocity to transfer and above propose shell and its internal structure, to obtain
The full-wave train of gas storage well different depth is taken to detect signal；
S14: ground control system carries out data processing, to obtain the bonding quality of gas storage well cement protective layer.
In one embodiment of this invention, the emission sensor is piezoelectric ceramic transducer.
In one embodiment of this invention, the instrument amplifier is INA128.
In one embodiment of this invention, the bandwidth of the bandpass filter is between 10kHz~30kHz.
In one embodiment of this invention, the analog-digital converter is AD9240, and the digital signal processor is
DSPic33EP256MC502。
In one embodiment of this invention, clump weight is further set in housing bottom and lifting hooks, wherein lifting hooks solid
Due to the lower end of clump weight.
In one embodiment of this invention, the signal that digital signal processor issues uses Manchester's code.
In one embodiment of this invention, the sound insulating material is polytetrafluoroethylene (PTFE).
In one embodiment of this invention, it fills and is equipped with plug screw at oilhole.
In one embodiment of this invention, the material of the shell is steel.
The sound wave detecting method that bonding quality provided by the invention to gas storage well cement protective layer is detected sufficiently is examined
The design feature of gas storage well is considered, the bonding quality of gas storage well cement protective layer can fast and accurately have been detected, and energy
The bonding quality for enough meeting gas storage well cement protective layer is detected for the requirement in detection accuracy and longitudinal resolution.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram that each component is arranged in enclosure interior using method of the invention；
Fig. 2 is the schematic diagram that each electrical component is connected using method of the invention；
Fig. 3 is detection principle diagram of the invention；
Fig. 4 is the cementing sonic detection full-wave train wavy curve schematic diagram of cement protective layer；
Fig. 5 is the cementing sonic detection full-wave train luminance curve synoptic diagram of cement protective layer.
Description of symbols: 1- shell；2- multi-core sheathed cable；3- collar locator；4- electronic line structure；41- letter
Number amplifier；42- low-pass filter；43- mission controller；44- digital signal processor；45- coupling transformer；46- instrument
Amplifier；47- bandpass filter；48- analog-digital converter；49- high speed the spread of the rumours module；5- emission sensor；61- short space receives
Sensor；62- long space receiving sensor；63- sound insulating material；7- ground control system；8- erects (axis) to hollow hole；9- is horizontal
(diameter) is to hollow hole, 10- clump weight；11- lifting hooks.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is the schematic diagram that each component is arranged in enclosure interior using method of the invention, and Fig. 2 is to utilize side of the invention
Method connects the schematic diagram of each electrical component, please refers to Fig. 1, Fig. 2, provided by the invention to the cementing of gas storage well cement protective layer
Sound wave detecting method that quality is detected the following steps are included:
S1: a hollow cylinder, length are chosen as 1.7m shell 1, shell 1 plays guarantor to the part for being located at underground in Fig. 1
The effects of protecting each element of internal structure/route, fixing internal, in the present embodiment, the material of shell 1 is steel；
S2: uniformly cutd open at 1 top 0.8m of shell, at 1 top 1.4m of shell, at 1 bottom of shell set it is multiple
(axis) is erected to hollow hole 8, is uniformly cutd open on shell between at 1 top 0.8m of shell with apart from 1 top 1.4m of shell
If it is multiple cross (diameters) to hollow hole 9, uniformly cutd open on the shell at 1 top 1.4m of shell between 1 bottom of shell set it is more
A cross (diameter) is to hollow hole 9；
S3: an emission sensor 5, a long space receiving sensor 62 and a short space receiving sensor 61 are chosen, is being sent out
The outside for penetrating sensor 5, short space receiving sensor 61 and long space receiving sensor 62 is arranged a leather bag, wherein leather bag
It is annular in shape, wall thickness 3mm, internal diameter 60mm, length 100mm, held inside leather bag silicone oil and its at the top of and
Bottom is respectively set a filling oilhole, and leather bag is used for pressure of the balance sensor in gas storage well, in the present embodiment, fills and sets at oilhole
There is plug screw；
Emission sensor 5 is used to issue the acoustic signals of 15kHz-20kHz.It is illustrated in figure 3 testing principle of the invention
Figure, is illustrated in figure 4 the cementing sonic detection full-wave train wavy curve schematic diagram of cement protective layer, for general pit shaft and stratum
For, well casing wave dominant frequency is 20kHz or so, and formation wave dominant frequency range is 14kHz~17kHz, in order to meet the sensitivity of detection
And accuracy, in the present embodiment, emission sensor 5 uses piezoelectric ceramic transducer.
In the present invention, perpendicular (axis) to hollow hole 8 can be normally carried out for guaranteeing sensor transmission, receiving signal,
Horizontal (diameter) is that acoustic signals are propagated along shell and interfered in order to prevent to hollow hole 9, and sound insulating material can prevent sound wave from believing
It number propagates and interferes inside housings.
S4: will be arranged the setting of the long space receiving sensor 62 after leather bag in 1 bottom of shell, will be arranged the short source after leather bag
It is mounted at 1 top 1.4m of shell away from receiving sensor 61, the emission sensor 5 after leather bag will be arranged and be mounted on apart from shell
At 1 top 0.8m of body, wherein in installation process, between emission sensor 5 and short space receiving sensor 61, short space
Sound insulating material 63 is filled between receiving sensor 61 and long space receiving sensor 62, in the present embodiment, sound insulating material 63 is used
Be polytetrafluoroethylene (PTFE)；
" source away from " (the distance between sensor) is the principal element for determining detection accuracy and longitudinal resolution, and source is away from more
Small, detection accuracy and longitudinal resolution are higher, but source away from it is too small will lead to well casing wave and direct wave, formation wave, primary reflection,
Multiple reflection is received by sensor simultaneously and can not be differentiated.Above-mentioned source in the present invention is away from being to be calculated by simulation and experiment is surveyed
Examination and the best source that finally obtains away from.
One electronic line structure 4: being fixed on the top of emission sensor 5 by S5, and electronic line structure 4 amplifies including signal
Device 41, low-pass filter 42, mission controller 43, digital signal processor 44, coupling transformer 45, instrument amplifier 46, band
Bandpass filter 47, analog-digital converter 48 and high speed the spread of the rumours module 49,
Wherein, low-pass filter 42 is connect with signal amplifier 41, for carrying out low-pass filtering to the signal received；
Mission controller 43 is connect with emission sensor 5；
Digital signal processor 44 is connect with mission controller 43, issues 0~2000V's for controlling mission controller 43
Voltage pulse signal；
Coupling transformer 45 is connect with short space receiving sensor 61 and long space receiving sensor 62, for short space
The full-wave train acoustic signals that receiving sensor 61 and long space receiving sensor 62 are sent are coupled；
Instrument amplifier 46 is connect with coupling transformer 45, the full-wave train acoustic signals for exporting to coupling transformer 45
It amplifies, in the present embodiment, instrument amplifier 46 uses INA128；
Bandpass filter 47 is connect with instrument amplifier 46, and in the present embodiment, the bandwidth of bandpass filter 47 is between 10kHz
Between~30kHz；
Analog-digital converter 48 is connect with digital signal processor 44 and bandpass filter 47, in the present embodiment, analog-to-digital conversion
Device 48 uses AD9240；
High speed the spread of the rumours module 49 is connect with digital signal processor 44；
Full-wave train acoustic signals that digital signal processor 44 exports analog-digital converter 48, low-pass filter 42 export
Signal carries out data compression, is again later a frame by every 64ms data encoding via high speed the spread of the rumours module 49 and uploads, this implementation
In example, digital signal processor 44 uses DSPic33EP256MC502, and the signal that digital signal processor 44 issues
Using Manchester's code；
S6: a collar locator 3 is fixed at 1 top 0.2m of shell, and is electrically connected collar locator 3 and letter
Number amplifier 41, signal amplifier 41 are used to amplify the box cupling signal of the transmission of collar locator 3, and collar locator 3 is
The commonly used equipment in field, is worked based on electromagnetic induction principle, is well known to those skilled in the art, in the present invention into
Row auxiliary depth localization；
S7: one multi-core sheathed cable 2 of arrangement, wherein multi-core sheathed cable 2 includes a upper end, a lower end and a main body, will
Its main body is wound on a hoist engine, and 1 top of shell is fixed in lower end and is connect with high speed the spread of the rumours module 49, for providing electricity
Power, transmission telecommunications number and drive shell 1 and its internal structure rise and decline；
S8: a ground control system 7 is connect with the upper end of hoist engine and multi-core sheathed cable 2, for controlling elevator
Machine carries out depth localization by the moving distance for measuring multi-core sheathed cable 2 and carries out subsequent processing to electric signal；
S9: using all gas medium in fluid couplant displacement gas storage well bore, and pit shaft inner surface is carried out clear
Reason；
S10: will be hung in gas storage well under shell 1 and its internal structure, and guarantee that shell 1 is placed in the middle；
S11: according to the parameter selections comparative test well demarcating file such as pit shaft material, internal diameter and wall thickness, or using to having a competition
Tube field calibration is tested, the confirmation or adjustment of parameter are carried out；
S12: operation ground control system 7 is connect with controlling emission sensor 5, long space receiving sensor 62 and short space
It receives sensor 61 to work, ground control system 7 receives and stores the signal sent back to；
Wherein, the acoustic signals that emission sensor 5 emits, are incident on well tubular wall along different angle via couplant, due to
In each interface reflection, refraction and the waveform conversion of sound wave can occur for the difference of each medium acoustic impedance.In specific position with identical
Angle refraction returns couplant and is received by long space receiving sensor 62 and short space receiving sensor 61, obtains detection letter accordingly
Number.
S13: controlling hoist engine by ground control system 7, at the uniform velocity to transfer and above propose shell 1 and its internal structure, with
The full-wave train for obtaining gas storage well different depth detects signal；
At the uniform velocity be in order to guarantee acquire signal stabilization, avoid because hoist engine drive multi-core sheathed cable accelerate suddenly or
Slow down mobile and sensor is caused to receive loss of data caused by data exception or excessive velocities.By verification experimental verification, not
Under detection speed more than 0.15m/s, stable detection data can get, certain speed will affect detection efficiency slowly excessively.
S14: ground control system 7 carries out data processing, to obtain the bonding quality of gas storage well cement protective layer.
As shown in Figure 1, the present invention further can hook 11 in 1 bottom end of shell setting clump weight 10 and lifting, wherein lifting
Hook 11 lower ends for being fixed on clump weight 10.
It is because the present invention is in use, moving down with carry out detection dependence is to be placed in storage in Fig. 1 using clump weight 10
The self gravity of part inside gas well need to increase counterweight to guarantee that detection process is gone on smoothly, and density can be used in clump weight 10
Biggish metal is fabricated, diameter with diameter of the housing is roughly equal is preferred, length is depending on practical counterweight needs；Such as
Shown in Fig. 1, the shape that lifting hooks 11 is cone and punches on it, in order to carry, repair and maintain instrument.
In the prior art, the short space sensor in sound width/variable density log technology only receives the letter of Mintrop wave in full-wave train
Number, and given up the later arrivals signal comprising bulk information, especially the information of the cementing situation of second contact surface, second contact surface for
Gas storage well cement evaluation of protection layer no less important, and oil/gas well does not focus on second contact surface.The present invention is sent out using Manchester's code
Different acquisition time orders is sent, can control analog-digital converter 48 to acquire the data of 500us or 1500us, to realize short space
Receiving sensor receives all-wave column signal, to obtain more effective informations.
In the prior art, sound width/variable density log technology data analyze when the property based on oil-well cement and formulate and comment
Valence index, gas storage well seldom use oil-well cement, mostly use building building cement, also do not add cement additive in whipping process, and two
Person's acoustic properties has differences, especially interval transit time, and detection Acoustic Wave Propagation directly affects Data Management Analysis, and the present invention passes through
Simulation calculates and the experiment of practical cement acoustics, formulates Data Management Analysis index.
In addition, the left and right offset along time shaft can occur for the position of Mintrop wave when actual acquisition all-wave column signal, head is extracted
Wave maximum amplitude will provide a sample range, for example from 200us~300us, this range is known as position of strobe and gate
Width, this is common method in signal acquisition field, and the present invention is also same.
The specific embodiment of step S14 of the present invention described below:
The present invention be convert absolute acoustic amplitude-depth curve of Mintrop wave signal in full-wave train to cement protective layer without
Opposite sound width-depth curve that acoustic amplitude is 100% when cementing, calculation formula are as follows:
In formula:
U --- opposite acoustic amplitude, %；
A --- the acoustic amplitude to fathom a little, unit are millivolt (mV)；
Afp--- comparative test well or developmental tube measure the maximum acoustic amplitude without cementing, and unit is millivolt (mV).
Acoustic amplitude is bigger, and the first interface cementing situation is poorer.Opposite sound width curve is used for the first interface of quantitative analysis
Cementing situation, the present embodiment is using table 1 as classification foundation.
1 first interface agglutination sound width quality grading of table
Cement protective layer cementing sonic detection full-wave train luminance curve synoptic diagram is illustrated in figure 5 to connect when the present invention is implemented
The arrival time (abscissa) of the all-wave column signal received is all different according to casing inner diameter, cement density, density of earth formations etc., tool
Body shows as entirety and moves left and right, and variant with theoretical calculation numerical value, and range value (ordinate) basis of full-wave train is propagated through
Decaying, supply voltage in journey etc. are also variant, and practical calibration is carried out in practical engineering application.
The processing of all-wave positive half cycle tune brightness, processing method are as follows: electronic line structure believes full-wave train are carried out to all-wave column signal
The electric signal with its amplitude proportional number is converted to, after ground control system carries out detection, only retains the positive half cycle portion of electric signal
Point, by this part, electric signal is presented on oscillograph or picture tube, modulates its point brilliance.Wave amplitude is big, voltage is high, and luminous point is just
It is bright, show that band is black in logging diagram.And point brilliance it is low when, appear dimmed in logging diagram band.Negative half period voltage is
Zero, luminous point does not work, and white ribbon is shown as in logging diagram.The band that variable density log figure exactly black (ash) white is met each other, with it
The depth of color indicates the power of the signal received, referred to as luminance.Signal amplitude is big, i.e., luminance is strong, conversely, signal amplitude
Small, then luminance is weak.Full-wave train luminance curve is used for the first interface of qualitative analysis and the cementing situation of second contact surface.
Full-wave train luminance curve is used for the cementing situation of qualitative analysis, can refer to " SY/T 6592-2016 primary cement evaluation
Method ", in actually detected, the luminance curve of different gas storage wells is widely different, generally by same gas storage well under different depth
Full-wave train luminance curvilinear characteristic mutually compared, to obtain quality grading, as shown in table 2.
2 first interface of table and the cementing luminance quality grading of second contact surface
It is cementing according to whole first interface of gas storage well and the cementing situation of second contact surface, overall merit gas storage well cement protective layer
Quality.
In the present invention, comparative test well demarcating file is known as calibration file in oil well logging, claims in field of non destructive testing
It is general to be demarcated using the outer comparative test well entirely without cementing of well casing for calibration, acquire the maximum in calibration process
A in acoustic amplitude, that is, formula (1)fp, the value and pit shaft material (velocity of sound), internal diameter and wall thickness (propagation distance) have relationship, therefore
The gas storage well of detection different size will be chosen at the demarcating file in the comparative test well of corresponding specification, this will affect to most terminating
The judgement of fruit, meanwhile, because test well can not be completely the same with actually detected gas storage well, the parameter master that needs to adjust when detecting
It to be instrument supply voltage electric current and fading gain etc., to guarantee that detection data meets the related request of data acceptance.
The sound wave detecting method that bonding quality provided by the invention to gas storage well cement protective layer is detected sufficiently is examined
The design feature of gas storage well is considered, the bonding quality of gas storage well cement protective layer can fast and accurately have been detected, and energy
The bonding quality for enough meeting gas storage well cement protective layer is detected for the requirement in detection accuracy and longitudinal resolution.
Those of ordinary skill in the art will appreciate that: attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
Those of ordinary skill in the art will appreciate that: the module in device in embodiment can describe to divide according to embodiment
It is distributed in the device of embodiment, corresponding change can also be carried out and be located in one or more devices different from the present embodiment.On
The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment or equivalent replacement of some of the technical features；And
These are modified or replaceed, the spirit and model of technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. the sound wave detecting method that the bonding quality of a kind of pair of gas storage well cement protective layer is detected, which is characterized in that including
Following steps:
S1: a hollow cylinder is chosen, the shell that length is 1.7m；
S2: at case top 0.8m, uniformly cutd open at case top 1.4m, at housing bottom and set multiple vertical hollow outs
Hole is uniformly cutd open on the shell at case top 0.8m and between apart from case top 1.4m and sets multiple lateral hollow outs
Hole is uniformly cutd open on the shell at case top 1.4m between housing bottom and sets multiple lateral hollow holes；
S3: choosing an emission sensor, a long space receiving sensor and a short space receiving sensor, emission sensor,
The outside of short space receiving sensor and long space receiving sensor is arranged a leather bag, wherein leather bag is annular in shape, wall thickness
Degree be 3mm, internal diameter 60mm, length 100mm, held inside leather bag silicone oil and its at the top and bottom of a filling is respectively set
Oilhole, emission sensor are used to issue the acoustic signals of 15kHz-20kHz；
S4: will be arranged the setting of the long space receiving sensor after leather bag in housing bottom, will be arranged the short space after leather bag and receives
Sensor is mounted at case top 1.4m, will be arranged the emission sensor after leather bag and is mounted on apart from case top 0.8m
Place, wherein in installation process, between emission sensor and short space receiving sensor, short space receiving sensor and length
Source is away from filling sound insulating material between receiving sensor；
One electronic line structure: being fixed on the top of emission sensor by S5, and electronic line structure includes signal amplifier, low pass
Filter, mission controller, digital signal processor, coupling transformer, instrument amplifier, bandpass filter, analog-digital converter
And high speed the spread of the rumours module,
Wherein, low-pass filter is connect with signal amplifier, for carrying out low-pass filtering to the signal received；
Mission controller is connect with emission sensor；
Digital signal processor is connect with mission controller, and the voltage pulse letter of 0~2000V is issued for controlling mission controller
Number；
Coupling transformer is connect with short space receiving sensor and long space receiving sensor, for short space receiving sensor
The full-wave train acoustic signals sent with long space receiving sensor are coupled；
Instrument amplifier is connect with coupling transformer, and the full-wave train acoustic signals for exporting to coupling transformer amplify；
Bandpass filter is connect with instrument amplifier；
Analog-digital converter is connect with digital signal processor and bandpass filter；
High speed the spread of the rumours module is connect with digital signal processor；
The signal of full-wave train acoustic signals, low-pass filter output that digital signal processor exports analog-digital converter counts
According to compression, it is again later a frame by every 64ms data encoding via high speed the spread of the rumours module and uploads；
S6: a collar locator is fixed at case top 0.2m, and is electrically connected collar locator and signal amplification
Device, signal amplifier are used to amplify the box cupling signal of collar locator transmission；
S7: one multi-core sheathed cable of arrangement, wherein multi-core sheathed cable includes a upper end, a lower end and a main body, by its main body
It is wound on a hoist engine, case top is fixed in lower end and is connect with high speed the spread of the rumours module, for providing electric power, transmission electricity
Signal and drive shell and its internal structure rise and decline；
S8: a ground control system is connect with the upper end of hoist engine and multi-core sheathed cable, for controlling hoist engine, passing through
The moving distance for measuring multi-core sheathed cable carries out depth localization and carries out subsequent processing to electric signal；
S9: using all gas medium in fluid couplant displacement gas storage well bore, and pit shaft inner surface is cleared up；
S10: it will be hung in gas storage well under shell and its internal structure, and guarantee that shell is placed in the middle；
S11: according to the parameter selections comparative test well demarcating file such as pit shaft material, internal diameter and wall thickness, or comparative test pipe is used
Field calibration carries out the confirmation or adjustment of parameter；
S12: operation ground control system, to control emission sensor, long space receiving sensor and short space receiving sensor
Work, ground control system receive and store the signal sent back to；
S13: controlling hoist engine by ground control system, at the uniform velocity to transfer and above propose shell and its internal structure, to obtain storage
The full-wave train of gas well different depth detects signal；
S14: ground control system carries out data processing, to obtain the bonding quality of gas storage well cement protective layer.
2. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
It is characterized in that, the emission sensor is piezoelectric ceramic transducer.
3. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
It is characterized in that, the instrument amplifier is INA128.
4. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
It is characterized in that, the bandwidth of the bandpass filter is between 10kHz~30kHz.
5. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
It is characterized in that, the analog-digital converter is AD9240, the digital signal processor is DSPic33EP256MC502.
6. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
It is characterized in that, clump weight and lifting hook is further arranged in housing bottom, wherein lifting hooks the lower end for being fixed on clump weight.
7. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
It is characterized in that, the signal that digital signal processor issues uses Manchester's code.
8. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
It is characterized in that, the sound insulating material is polytetrafluoroethylene (PTFE).
9. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
Plug screw is equipped at oilhole it is characterized in that, filling.
10. the sound wave detecting method that the bonding quality according to claim 1 to gas storage well cement protective layer is detected,
The material of the shell is steel.
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