CN207144934U - One kind crosses drill bit dipole acoustic logging transmitter and well logging apparatus - Google Patents
One kind crosses drill bit dipole acoustic logging transmitter and well logging apparatus Download PDFInfo
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- CN207144934U CN207144934U CN201720342475.8U CN201720342475U CN207144934U CN 207144934 U CN207144934 U CN 207144934U CN 201720342475 U CN201720342475 U CN 201720342475U CN 207144934 U CN207144934 U CN 207144934U
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Abstract
A kind of transmitter and well logging apparatus for crossing drill bit dipole acoustic logging device is the utility model is related to, the transmitter includes substrate and 2n piezoelectric ceramic plate；Wherein, the piezoelectric ceramic plate is made up of the piezoelectric ceramics unit of 2n blocks；The substrate is provided at both ends with through hole, and the substrate is fixed on into described cross on drill bit dipole acoustic log device by the through hole using fixture；During work, the piezoelectric ceramic plate elongation of the substrate side, the piezoelectric ceramic plate of opposite side shortens, and promotes the substrate to form flexural vibrations, to working medium radiation thrust, produces sound wave.Segmented dipole launcher in the utility model has the characteristics of low frequency, high-power transmitting, suitable for transducer drill bit, minor diameter acoustic logging, be more suitable for the shear wave measurement on soft formation even ultra-soft stratum.
Description
Technical field
Mineral resources exploration and development technique field are the utility model is related to, particularly in field geophysics (well logging) skill
The fields such as art, drilling measuring technology and drilling measuring technology, more particularly to it is a kind of cross drill bit dipole acoustic logging transmitter and
Well logging apparatus.
Background technology
Formation evaluation before and after big net horizontal section (such as more than 1000 meters) hydraulic fracturing be China's shale gas exploitation focus,
Difficult point and key problem in technology.It is the preferred metering system for solving at present the problem to cross drill bit cross-dipole acoustic logging.
Cross a kind of new technology to grow up in recent years during drill bit well logging.Cross drill bit well logging and refer to that logger passes through drill bit
And enter a kind of mode that measurement well section carries out log data acquisition.Crossing drill bit logging technique has the advantages of its is unique, main bag
Include it is following some：1. reducing operating risk, most of the time logger is protected in drilling rod；2. save the activity duration.
Logging operation need not can just be carried out by drilling tool taking-up ground by crossing drill bit well logging, for wireline logging, greatly save completion
Activity duration.3. obtain continuous reliable log data.It is the logger when drill bit and drilling rod stop vibration crossing drill bit well logging
Combination measures through drill bit to target zone.Therefore, the quality of data of acquisition is reliable and stable.4. carry out prospecting well logging.Cross brill
Head well logging can enter Open-Hole Section in the case where not taking out drill bit and measure, and the various important informations of reservoir be obtained, for instructing
Continue drilling well, help is provided for Scientific drilling method.
It is small to cross drill bit logging requirements logging instrument external diameter, instrument external diameter is 54mm at present, mainly including natural gamma, well temperature,
Induction motor, natural potential, density of earth formations, hole diameter, neutron porosity and monopole interval transit time etc..Cross drill bit logging technique
Suitable for the severe borehole condition such as horizontal well, high angle hole and borehole collapse and shale expansion, in North Sea prospect pit and evaluation
Measured in well, overcome the problem that Regular wireline is hampered, achieve the log data of high quality.
Cross drill bit monopole interval transit time instrument and mainly carry out shear wave and velocity of longitudinal wave measurement, instrument diameters 54mm is more
The velocity of longitudinal wave and shear wave velocity of the monopole acoustic logging instrument record of receiver, rock can be calculated with reference to density log data
Attribute, including Poisson's ratio, static Young's modulus and minimum level stress gradient.Stress data and can reflect reservoir quality join
Number (such as clay content and porosity), to selecting optimal hydraulic fracturing measure interval very useful.But monopole acoustic logging instrument
Device can not measure to obtain the shear wave velocity on stratum in soft formation and ultra-soft stratum, therefore also can not just obtain the attribute of rock, its
Caused by main cause is monopole sound source.The main method for solving this problem is to use dipole and cross-dipole transducer
As transmitting transducer, the transverse wave velocity measurement on stratum is carried out.But drill bit cross-dipole sound wave was also seldom seen at present
The open report that logger business uses.
Normal cable formula dipole array acoustilog instrument device external diameter is 90mm at present, and transducer (also referred to as transmitter) is main
There are two kinds, one kind is electromagnetic type dipole acoustic transducer, and another kind is laminated type flexural vibrations PZT (piezoelectric transducer).General lamination
The piezoelectric ceramic piece and metal aluminium substrate gluing that type flexural vibrations PZT (piezoelectric transducer) is polarized by thickness direction form.Due to crossing drill bit
Instrument external diameter very little (54mm), the crystal of the bending vibrator of lamination and the physical dimension of substrate are all reduced accordingly, and this makes
After obtaining the assembling of cross-dipole transducer, bending a period of time radiating surface narrows compared with conventional orthorhombic dipole acoustic instrument, causes
Transducer excitation energy weakens, signal to noise ratio reduces.
The content of the invention
The purpose of this utility model is that providing a kind of drill bit dipole acoustic logging of crossing in view of the shortcomings of the prior art fills
The structure design and its well logging apparatus of the transmitter and its well logging apparatus put, mainly pinger, meeting drill bit survey
Under conditions of well instrument mechanical requirements, it can also meet the acoustic performance requirements of minor diameter cross-dipole acoustic logging transmitter.
To solve the above problems, in a first aspect, the utility model, which provides one kind, crosses drill bit dipole acoustic logging device
Transmitter, the transmitter includes substrate and 2n piezoelectric ceramic plate；Wherein,
The piezoelectric ceramic plate is made up of the piezoelectric ceramics unit of 2n blocks；
The substrate is provided at both ends with through hole, and the substrate is fixed on into described cross by the through hole using fixture bores
On head dipole acoustic log device；
During work, the piezoelectric ceramic plate elongation of the substrate side, the piezoelectric ceramic plate of opposite side shortens, and promotes the base
Plate shape, to working medium radiation thrust, produces sound wave into flexural vibrations.
Preferably, the piezoelectric ceramic plate is made up of the piezoelectric ceramics unit of 2n blocks.
It is further preferred that the piezoelectric ceramic plate is formed by the piezoelectric ceramics unit of 2n blocks using adhesive bonding.
It is further preferred that the adhesive is epoxy resin.
It is further preferred that the polarised direction of the adj acent piezoelectric ceramic unit is opposite.
Preferably, it is bonded between the piezoelectric ceramic plate and the substrate using adhesive.
It is further preferred that the adhesive is epoxy resin.
Preferably, the substrate is titanium, copper, aluminium or low-expansion alloy.
Preferably, the material of the piezoelectric ceramic plate is PZT4 or PZT8.
Second aspect, the utility model additionally provide a kind of drill bit dipole sonic excessively comprising transmitter described in first aspect
Well logging apparatus.
Compared with conventional laminated type dipole launcher, segmented dipole launcher design of the present utility model can increase
Add the bending deformation quantity of transmitter, the thrust of increase emitter surface laterally, so as to improve the emitted energy of transmitter；This reality
With the new transmitting that can be realized in limited space compared with low-frequency sound wave, the soft formation even shear wave on ultra-soft stratum are more suitable for
Measurement etc..
Brief description of the drawings
Hereinafter, embodiment of the present utility model is described in detail with reference to accompanying drawing, wherein：
Fig. 1 is acoustic measurement schematic diagram；
Fig. 2 is the dipole launcher schematic top plan view that the present embodiment provides；
Fig. 3 is one of schematic diagram of dipole launcher longitudinal section that the utility model embodiment provides；
Fig. 4 is the two of the schematic diagram for the dipole launcher longitudinal section that the utility model embodiment provides；
Fig. 5 is the three of the schematic diagram for the dipole launcher longitudinal section that the utility model embodiment provides；
Fig. 6 is conductance-frequency curve contrast of two kinds of transmitters in 40~5000Hz frequency ranges；
Conductance-frequency curve contrast of the two kinds of transmitters of Fig. 7 in 500~1000Hz frequency ranges；
Conductance-frequency curve contrast of the two kinds of transmitters of Fig. 8 in 2000~3000Hz frequency ranges.
Embodiment
Below by accompanying drawing and specific embodiment, the utility model is further detailed, it should be appreciated that
These embodiments, which are only used for being described in more detail, to be used, and should not be construed as limiting the utility model to any form, i.e.,
It is not intended to limit the scope of protection of the utility model.
Utility model Fig. 1 is the acoustic measurement schematic diagram that the utility model embodiment provides, as shown in figure 1, well logging apparatus 1
It is stratum 8 outside the wellhole 9 in the wellhole 9 full of the medium of mud 7.Wherein, well logging apparatus 1 includes radiating circuit 2, hair
Emitter 3, acoustic isolater 4, receiver array 5 and receiving circuit 6.At work, well logging apparatus 1 is connected with cable 10, by transmitting electricity
Road 2 produces electric signal, transmitter 3 is produced sound wave, by the medium of mud 7, reaches stratum 8, is then propagated in stratum 8.Again
The acoustic signals with the information of stratum 8 are converted into electric signal by receiver array 5, then carried out according to the electric signal received
Formation evaluation.Sonic transmissions process is as shown by the arrows in Figure 1.
Fig. 2 is the dipole launcher schematic top plan view that the utility model embodiment provides.
As shown in Fig. 2 the transmitter of the embodiment, including：Piezoelectric ceramic plate 31 and substrate 32, wherein the piezoelectric ceramics
Plate 31 is at least 2n, and piezoelectric ceramic plate 31 is made up of the piezoelectric ceramics unit 311 of 2n blocks；Wherein n is natural number.
The substrate is provided at both ends with through hole 321, is fixed on the substrate 32 by the through hole 321 using fixture
It is described to cross on drill bit dipole acoustic log device 1；
During work, the piezoelectric ceramic plate 31 of the side of substrate 32 extends, and the piezoelectric ceramic plate 31 of opposite side shortens, and promotes
The substrate 32 forms flexural vibrations, to working medium radiation thrust, produces sound wave.Launch implement body decomposing schematic representation as shown in figure 3,
It is of course also possible to by using the arrangement mode and electrode connection mode that change piezoelectric ceramics unit 311, other forms are formed
Dipole coil transmitter, as shown in Figure 4 and Figure 5, and it is not limited to the form shown in Fig. 3.It is pointed out that Fig. 3, Fig. 4 and Fig. 5
The middle direction of arrow is the polarised direction of piezoelectric ceramics unit 311, wherein, the polarised direction of adj acent piezoelectric ceramic unit 311 on the contrary,
The electrode of positive electrode 11 and negative electrode 12 respectively between two panels piezoelectric ceramics unit 311 is connected, specific connected mode such as Fig. 3,
Shown in Fig. 4 and Fig. 5.It is of course also possible to select the connected mode outside Fig. 3, Fig. 4 and Fig. 5.
It should be noted that 2n piezoelectric ceramic plate 31 is evenly distributed on the both sides of substrate 32, in Fig. 3, Fig. 4 and Fig. 5
Shown, 2 piezoelectric ceramic plates of substrate both sides are respectively made up of 8 pieces of piezoelectric ceramics units.Wherein, in actual mechanical process, pressure
Electroceramics plate is typically fixed on well logging apparatus 1 with screw by perforation 321, is typically perforated preferably the two of zig direction
End, and shape and quantity are set as the case may be, preferably circular, quantity is generally 4, but is not limited to 4.
In one example, substrate 32 is usually the metal materials such as titanium, copper, aluminium, low-expansion alloy.
In another example, piezoelectric ceramic plate 31 is to be bonded by piezoelectric ceramics unit 311 using adhesive.It is described
Adhesive is preferably epoxy resin Polymer material, but is also not only limited to such adhesive.Preferably, the piezoelectric ceramics
Also it is bonded between plate 31 and the substrate 32 using adhesive.It is further preferred that the adhesive is epoxy resin etc.
High polymer material, but also it is not only limited to such adhesive.
In another example, piezoelectric ceramics plate material is PZT4 or PZT8, but is not limited to the piezoelectricity of both types
Ceramic material.
In order to highlight the application advantage of segmented dipole launcher in well logging in the utility model, we measure
The conventional and segmented dipole launcher admittance performance under free state in atmosphere, thick line represents conventional dipole in figure
Transmitter, fine rule represent segmented dipole launcher.Fig. 6 is electricity of two kinds of transmitters in 40~5000Hz frequency ranges
- frequency curve comparison diagram is led, as can be seen that segmented dipole launcher has relatively low resonant frequency and higher from figure
Conductance peaks.Fig. 7 is conductance-frequency curve comparison diagram of two kinds of transmitters in 500~1000Hz frequency ranges, can by figure
Know, the resonant frequency of segmented dipole launcher reduces 80Hz than conventional dipole transmitter, and conductance peaks are about normal
Advise dipole launcher 13 times.Fig. 8 is conductance-frequency curve pair of two kinds of transmitters in 2000~3000Hz frequency ranges
Than figure, as seen from the figure, the resonant frequency of segmented dipole launcher reduces 380Hz than conventional dipole transmitter, and electric
Lead 4 times that peak value is about conventional dipole transmitter.
Contrasted from Fig. 6 to Fig. 8 measurement result, the segmented dipole launcher in the utility model has low
Frequently, the characteristics of high-power transmitting, suitable for transducer drill bit, minor diameter acoustic logging, be more suitable for soft formation or even super
The shear wave measurement of soft formation.
Shear wave ring anisotropic character may be used to determine using cross-dipole sonic data, and further obtain well
The anisotropy information of wall surrounding formation, particularly have in the research of stratum fracture water flow and the measurement of crustal stress extensive
Using.
Although the utility model has been carried out a certain degree of description, it will be apparent that, do not departing from spirit of the present utility model
Under conditions of scope, the appropriate change of each condition can be carried out.It is appreciated that the utility model is not limited to the embodiment party
Case, and it is attributed to the scope of claim, it includes the equivalent substitution of each factor.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (9)
1. a kind of transmitter for crossing drill bit dipole acoustic logging device, it is characterised in that the transmitter includes substrate and 2n
Individual piezoelectric ceramic plate；Wherein,
The piezoelectric ceramic plate is made up of the piezoelectric ceramics unit of 2n blocks；
The substrate is provided at both ends with through hole, and the substrate is fixed on into the idol of drill bit excessively by the through hole using fixture
On the acoustical well-logging devices of pole；
During work, the piezoelectric ceramic plate elongation of the substrate side, the piezoelectric ceramic plate of opposite side shortens, and promotes the substrate shape
Into flexural vibrations, to working medium radiation thrust, sound wave is produced.
2. transmitter according to claim 1, it is characterised in that the piezoelectric ceramic plate by 2n blocks piezoelectric ceramics unit
Formed using adhesive bonding.
3. transmitter according to claim 2, it is characterised in that the adhesive is epoxy resin.
4. transmitter according to claim 2, it is characterised in that the polarised direction of adj acent piezoelectric ceramic unit is opposite.
5. transmitter according to claim 1, it is characterised in that glue is used between the piezoelectric ceramic plate and the substrate
Glutinous agent is bonded.
6. transmitter according to claim 5, it is characterised in that the adhesive is epoxy resin.
7. transmitter according to claim 1, it is characterised in that the substrate is titanium, copper, aluminium or low-expansion alloy.
8. transmitter according to claim 1, it is characterised in that the material of the piezoelectric ceramic plate is PZT4 or PZT8.
9. one kind crosses drill bit dipole acoustic logging device, it is characterised in that includes claim 1-6 any one claims
Described transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720342475.8U CN207144934U (en) | 2017-04-01 | 2017-04-01 | One kind crosses drill bit dipole acoustic logging transmitter and well logging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720342475.8U CN207144934U (en) | 2017-04-01 | 2017-04-01 | One kind crosses drill bit dipole acoustic logging transmitter and well logging apparatus |
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| Publication Number | Publication Date |
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| CN207144934U true CN207144934U (en) | 2018-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472761A (en) * | 2020-05-07 | 2020-07-31 | 神华神东煤炭集团有限责任公司 | Main fracture structural surface determining method and monitoring equipment |
-
2017
- 2017-04-01 CN CN201720342475.8U patent/CN207144934U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472761A (en) * | 2020-05-07 | 2020-07-31 | 神华神东煤炭集团有限责任公司 | Main fracture structural surface determining method and monitoring equipment |
| CN111472761B (en) * | 2020-05-07 | 2023-07-25 | 神华神东煤炭集团有限责任公司 | Main fracture structural surface determining method and monitoring equipment |
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