CN104483707B - A kind of single dipole mixed method and device for being used to far detect well logging - Google Patents
A kind of single dipole mixed method and device for being used to far detect well logging Download PDFInfo
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- CN104483707B CN104483707B CN201410705333.4A CN201410705333A CN104483707B CN 104483707 B CN104483707 B CN 104483707B CN 201410705333 A CN201410705333 A CN 201410705333A CN 104483707 B CN104483707 B CN 104483707B
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Abstract
The present invention relates to a kind of single dipole mixed method and device for being used to far detect well logging, including：Sound source and at least one receiver are arranged in well to be detected；When sound source excites wave field, the first receiving unit gathers the first log data, and the second receiving unit gathers the second log data, and the 3rd receiving unit gathers the 3rd log data, and the 4th receiving unit gathers the 4th log data；First log data, the second log data, the 3rd log data and the 4th log data are combined, acyclic type is obtained and receives data, X-direction and Y-direction dipole type reception data；Data are received according to the form of sound source and acyclic type, X-direction dipole type receives data, and Y-direction dipole type receives data, obtains conventional logging data and remote detection log data.The embodiment of the present invention can largely improve amplitude of the well external reflectance ripple relative to direct wave in well, and then geological structure outside well is carried out accurately and to be effectively imaged.
Description
Technical field
The present invention relates to geophysical log field, more particularly to a kind of well logging based on monopole dipole mixed mode of operation
Method and apparatus.
Background technology
With deepening continuously for oil-gas exploration and development, people to the resolution ratio of geophysical information with required precision increasingly
Height, although conventional logging technology resolution ratio and precision are all very high, limited by investigative range and detection yardstick, conventional logging skill
Art can not detect the area of the borehole wall other than around.
The stratigraphic structure in the range of several meters around well to tens of rice and geologic body are carried out instead by acoustic logging in well
The technology of ejected wave imaging is referred to as remote Detection Techniques, and it brings up to the measurement range of conventional logging technology from one meter away from the borehole wall or so
Tens meters.The remote Detection Techniques application prospect is very huge, can be used for showing the geological interface intersected with well；By detecting shaft
Tilted stratum interface, crack, tomography etc.；It can also be used to follow the trail of oil storage border etc. in horizontal well.
The remote Detection Techniques of sound wave are divided to two kinds of monopole normal beam technique and dipole shear wave method.Monopole normal beam technique utilizes monopole in well
Sound source and is received using monopole and back wave in well is reflected back through well external reflectance body, wherein monopole is indulged to the compressional wave of well external radiation
The frequency of source of ripple is typically in 10kHz or so, but the wave attenuation of upper frequency causes the investigative range of monopole normal beam technique limited,
About several meters to ten several meters of scope, and it is non-directional due to monopole sound source radiation so that the side of reflector is not can determine that
Position；Dipole shear wave method is remote Detection Techniques developed in recent years, and the frequency used is about 3-5kHz, even lower, due to
Frequency is relatively low, and this method has deeper detection range, up to tens meters of scope, further, since the directive property of sound source of the dipole
With directionality, this method not only can determine that the position of emitter, moreover it is possible to determine its trend.
Far detected however, carrying out sound wave in well, either for monopole normal beam technique (monopole excites monopole to receive), still
To the dipole shear wave method (reception of dipole excitation dipole) of newly-developed, significant limitation all be present, i.e., compared to mode wave in well,
The general very little of reflected signal, and be often superimposed with mode wave in well, it can be suppressed in digitlization or lose details,
Particularly if back wave and direct wave, when overlapping on then, weaker reflection wave signal is perhaps submerged in direct wave, because
This current remote detection operations pattern is often not fully up to expectations in real data processing, and then limits existing sound wave and far detect
Technology widely uses.
The content of the invention
Present invention aim to address in existing logging technique, the general very little of reflection wave signal, and often with pattern in well
Ripple is superimposed, and can suppress or loses in digitlization, particularly if back wave and direct wave be when overlapping on then,
The problem of weaker reflection wave signal is perhaps submerged in direct wave.
In a first aspect, the embodiments of the invention provide a kind of single dipole mixed method for being used to far detect well logging, the side
Method includes：Sound source and at least one receiver are arranged in well to be detected, wherein, the receiver includes circumferential be equidistantly spaced from
Four receiving units, the first receiving unit and the 3rd receiving unit in four receiving units be located at X-axis, described four
The second receiving unit and the 4th receiving unit in receiving unit are located at Y-axis；
When the sound source excites wave field, first receiving unit gathers the first log data, and the second receiving unit is adopted
Collect the second log data, the 3rd receiving unit gathers the 3rd log data, and the 4th receiving unit gathers the 4th log data；
First log data, the second log data, the 3rd log data and the 4th log data are combined, obtained
Obtain acyclic type and receive data, X-direction dipole type receives data and Y-direction dipole type receives data；
Data are received according to the form of the sound source and the acyclic type, X-direction dipole type receives data, Y-direction dipole
Formula receives data, obtains conventional logging data and remote detection log data.
Preferably, the sound source specifically includes：Monopole or dipole source.
Preferably, it is described to first log data, the second log data, the 3rd log data and the 4th log data
It is combined, obtains acyclic type reception data, X-direction dipole type receives data and Y-direction dipole type receives data and specifically included：
Acquisition list is added with the 4th log data to first log data, the second log data, the 3rd log data
Pole formula receives data；
First log data and the 3rd log data are subtracted each other and obtain X-direction dipole type reception data；
Second log data and the 4th log data are subtracted each other and obtain Y-direction dipole type reception data.
Preferably, when the sound source is monopole, it is conventional logging data that the acyclic type, which receives data, the X
Direction dipole type receives data and the Y-direction dipole type receives data as remote detection log data.
Preferably, when the sound source is dipole source, the acyclic type receives data as remote detection log data, described
It is conventional logging data that X-direction dipole type, which receives data and Y-direction dipole type reception data,.
Second aspect, the embodiments of the invention provide a kind of single dipole mixing arrangement for being used to far detect well logging, the dress
Put including：Arrangement unit, collecting unit, assembled unit, generation unit；
The arrangement unit, for arranging sound source and at least one receiver in well to be detected, wherein, the receiver
Including four receiving units being circumferentially equidistantly spaced from, the first receiving unit and the 3rd in four receiving units receive single
Member is located at X-axis, and the second receiving unit and the 4th receiving unit in four receiving units are located at Y-axis；
The collecting unit, for when the sound source excites wave field, first receiving unit to gather the first well logging number
According to the second receiving unit gathers the second log data, and the 3rd receiving unit gathers the 3rd log data, the collection of the 4th receiving unit
4th log data；
The assembled unit, for being surveyed to first log data, the second log data, the 3rd log data and the 4th
Well data are combined, and are obtained acyclic type and are received data, X-direction dipole type receives data and Y-direction dipole type receives data；
The generation unit, for the form according to the sound source and the acyclic type to receive data, X-direction dipole type connects
Receive data, Y-direction dipole type receives data, acquisition conventional logging data and remote detection log data.
Preferably, the sound source specifically includes：Monopole or dipole source.
Preferably, the assembled unit is specifically used for, to first log data, the second log data, the 3rd well logging
Data are added with the 4th log data obtains acyclic type reception data；
First log data and the 3rd log data are subtracted each other and obtain X-direction dipole type reception data；
Second log data and the 4th log data are subtracted each other and obtain Y-direction dipole type reception data.
Preferably, the generation unit is specifically used for, and when the sound source is monopole, the acyclic type receives data
For conventional logging data, the X-direction dipole type receives data and the Y-direction dipole type receives data and detects number of logging well to be remote
According to.
Preferably, the generation unit is specifically used for, and when the sound source is dipole source, the acyclic type receives data
For remote detection log data, it is conventional logging number that the X-direction dipole type, which receives data and Y-direction dipole type reception data,
According to.
The present invention by introducing a kind of new data acquisition scheme (monopole dipole hybrid working), well external reflectance ripple relative to
The amplitude of direct wave has enhancing in well, is advantageous to the extraction of reflection wave signal with separating；Further, since instrument gain not by
The influence of direct wave in high amplitude well, reflection wave signal can effectively be amplified in well, improve the quantified precision of back wave
With the suppression to transmitted noise, the accuracy and reliability of remote Detection Techniques are further increased；Second, for distance measurement well
Nearer reflector, in conventional data acquisition pattern, direct wave and well external reflectance ripple are overlapping more serious in well, it is difficult to effectively point
From, and then certain detection blind area be present in different remote detection instruments, it is blind to detecting by introducing new data acquisition scheme
Reflected signal corresponding to reflector in area can also accurate recording, improve identification energy of the remote detection to nearly borehole wall reflecting interface
Power；3rd, in current acoustic logging, both need to carry out to complete (such as the survey of formation velocity of conventional logging task sometimes
Amount), it is also necessary to well external reflectance body is imaged.In this case, in order to record go into the well middle direct wave and well external reflectance simultaneously
The information of ripple has in turn resulted in larger data transfer pressure, also influenceed accordingly, it is necessary to takes the well-logging length of overlength
The speed of conventional logging operation.The present invention is by introducing monopole dipole mixed mode of operation, by the collection of conventional logging data
Collection with remote detection data separates, and is independent of each other, parallel to carry out.So line number can be entered according to the demand of logging operation
According to collection and transmission：If need to only carry out conventional logging operation, to the reception data, (acyclic type or dipole type receive number
According to) in the part of conventional logging record length be digitized and be real-time transmitted to surface acquisition system, ensure that routine
The speed of logging operation.And if necessary to gather conventional logging data and remote detection log data simultaneously, then remote detection well logging number
It is acquired according to using longer acquisition window, and real-time Transmission is selected according to cable transmission speed or concentrated after being stored in instrument
Transmission；Routine data is still acquired and transmitted using conventional logging data acquisition length.
Brief description of the drawings
Fig. 1 is logging method flow chart provided in an embodiment of the present invention；
Fig. 2 is each receiving unit arrangement schematic diagram in receiver provided in an embodiment of the present invention；
Fig. 3 is each receiving unit combination schematic diagram provided in an embodiment of the present invention；
Fig. 4 a are provided in an embodiment of the present invention in monopole, and acyclic type receives data, X-direction dipole type receives number
Type of being logged well corresponding to data is received according to, Y-direction dipole type；
When Fig. 4 b are dipole sources provided in an embodiment of the present invention, acyclic type receives data, X-direction dipole type receives number
Type of being logged well corresponding to data is received according to, Y-direction dipole type；
Fig. 5 is that remote detection provided in an embodiment of the present invention calculates model schematic；
When Fig. 6 is monopole provided in an embodiment of the present invention, conventional logging waveform；
When Fig. 7 is monopole provided in an embodiment of the present invention, remote detection well logging waveform；
When Fig. 8 is monopole provided in an embodiment of the present invention, receiving unit P1 and P3 are respective at sound source 4.5m
Waveform subtracts each other resulting waveform with it；
When Fig. 9 is dipole source provided in an embodiment of the present invention, conventional logging waveform；
When Figure 10 is dipole source provided in an embodiment of the present invention, remote detection well logging waveform；
Figure 11 is well logging apparatus schematic diagram provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
For ease of the understanding to the embodiment of the present invention, it is further explained below in conjunction with accompanying drawing with specific embodiment
Bright, embodiment does not form the restriction to the embodiment of the present invention.
Describe logging method provided in an embodiment of the present invention in detail by taking Fig. 1 as an example below, Fig. 1 provides for the embodiment of the present invention
Logging method flow chart.As shown in figure 1, the embodiment specifically includes following steps：
S101, sound source and at least one receiver are arranged in well to be detected, wherein, the receiver is included between circumferential wait
It is located at X-axis, institute every the first receiving unit in four receiving units of arrangement, four receiving units and the 3rd receiving unit
State the second receiving unit in four receiving units and the 4th receiving unit is located at Y-axis；
Specifically, as shown in Fig. 2 Fig. 2 is that each receiving unit arrangement shows in receiver provided in an embodiment of the present invention
It is intended to.In fig. 2, including multiple receivers, each receiver includes the first receiving unit P1, the second receiving unit P2, the
Three receiving unit P3 and the 4th receiving unit P4, the position relationship of 4 receiving units is as illustrated, using borehole axis as Z axis
In detecting shaft, the first receiving unit P1 and the 3rd receiving unit P3 can be set and be located at X-axis, set the second receiving unit P2 and the
Four receiving unit P4 are located at Y-axis.
S102, when the sound source excites wave field, first receiving unit gathers the first log data, and second receives list
Member the second log data of collection, the 3rd receiving unit gather the 3rd log data, and the 4th receiving unit gathers the 4th log data；
Specifically, sound source can be monopole or dipole source.
S103, group is carried out to first log data, the second log data, the 3rd log data and the 4th log data
Close, obtain acyclic type and receive data, X-direction dipole type receives data and Y-direction dipole type receives data；
Specifically, as shown in figure 3, being surveyed to first log data, the second log data, the 3rd log data and the 4th
Well data, which are added, obtains acyclic type reception data, and first log data and the 3rd log data are subtracted each other and obtain X-direction idol
Pole formula receives data, and second log data and the 4th log data are subtracted each other and obtain Y-direction dipole type reception data.
S104, data are received according to the form of the sound source and the acyclic type, X-direction dipole type receives data, Y-direction
Dipole type receives data, obtains conventional logging data and remote detection log data.
Specifically, as shown in fig. 4 a, when the sound source is monopole, it is conventional logging that the acyclic type, which receives data,
Data, the X-direction dipole type receives data and the Y-direction dipole type receives data as remote detection log data.
Wherein, for monopole, what acyclic type received data record is conventional logging data, and X and the dipole of Y-direction
It is then to inhibit the remote detection log data of direct wave in well that formula, which receives data,.
As shown in Figure 4 b, when the sound source is dipole source, the acyclic type receives data as remote detection log data,
It is conventional logging data that the X-direction dipole type, which receives data and Y-direction dipole type reception data,.
Wherein, for dipole source, what acyclic type received data record is remote detection log data, and the idol of X and Y-direction
What pole formula received data record is then conventional dipole logging data.
Indicated above, conventional logging data are collected by general mode of operation in current acoustic logging
, i.e., monopole excites acyclic type to receive, and dipole source excites dipole type to receive.And it is to pass through monopole far to detect log data
Dipole mixed mode of operation, i.e. monopole source excitation dipole type receive, and dipole source excitation acyclic type receives what is collected.The present invention
Monopole dipole mixed mode of operation in embodiment can distinguish direct wave and well in production wells by the demand of practical logging operation
External reflectance ripple, it is parallel to carry out, it does not interfere with each other, this adaptive amplification and quantization to respective signal and follow-up data processing ten
Divide favourable.
S105, conventional logging data and remote detection log data are carried out data transmission and handled respectively.
Specifically, can be with real-time Transmission and in-situ processing to conventional logging data, and application conventional logging processing software enters
Row evaluation.For far detection log data, if data transmission bauds meets to require, real-time Transmission is carried out, if transmission
Speed can not reach requirement, then be stored in instrument, concentrate reading again after being all measured, be uniformly processed, and application is remote
Detection logging data processing software is evaluated.
By introducing a kind of new data acquisition scheme, (monopole dipole mixes work for logging method provided in an embodiment of the present invention
Make), well external reflectance ripple has enhancing relative to the amplitude of direct wave in well, is advantageous to the extraction of reflection wave signal with separating；Separately
Outside, due to instrument gain, direct wave is not influenceed in by high amplitude well, and reflection wave signal can effectively be amplified in well, be carried
High well external reflectance ripple improves the quantified precision of back wave and the suppression to transmitted noise relative to the amplitude of direct wave in well,
And then carry out accurately and effective imaging, further increasing the accuracy of remote Detection Techniques and reliable to geological structure outside well
Property；Second, for the reflector that distance measurement well is nearer, in conventional data acquisition pattern, direct wave and well external reflectance ripple in well
It is overlapping more serious, it is difficult to efficiently separate, and then certain detection blind area be present in different remote detection instruments, by introducing newly
Data acquisition scheme, to reflected signal corresponding to the reflector in detection blind area can also accurate recording, improve remote detection pair
The recognition capability of nearly borehole wall reflecting interface；3rd, in current acoustic logging, both need to carry out completing conventional logging sometimes
Task (such as measurement of formation velocity), it is also necessary to be imaged to well external reflectance body.In this case, in order to record simultaneously
The information of direct wave and well external reflectance ripple has in turn resulted in larger data, it is necessary to take the well-logging length of overlength in well
Pressure is transmitted, also have impact on the speed of conventional logging operation accordingly.The present invention by introducing monopole dipole mixed mode of operation,
The collection of conventional logging data and the collection of remote detection log data are separated, are independent of each other, it is parallel to carry out.So can be with
Data acquisition and transmission are carried out according to the demand of logging operation：If need to only carry out conventional logging operation, to the reception number
It is digitized according to the part of conventional logging record length in (acyclic type or dipole type receive data) and is real-time transmitted to ground
Acquisition system, it ensure that the speed of conventional logging operation.And if necessary to gather conventional logging data and remote detection simultaneously
Log data, then far detection log data is acquired using longer acquisition window, and is selected in fact according to cable transmission speed
When transmit or be stored in concentration of transmissions after instrument；Routine data is still acquired and passed using conventional logging data acquisition length
It is defeated.
When being separately below monopole source and dipole source to sound source, conventional logging illustrates with the waveform far detected.
The first situation：
In the case of monopole source, the well logging obtained by different data acquisition mode is calculated using Three dimensional finite difference simulation
Waveform, model calculate model schematic, in Figure 5, model as shown in figure 5, Fig. 5 is remote detection provided in an embodiment of the present invention
Size is x=6.5m, y=3m, z=10.5m, and liquid-filled well bore radius is 0.1m, and well is centrally located at x=y=1.5m, sound source
At z=0.5m.Using Moving grids finite difference, near wellbore grid is 0.01m, and remotely grid is 0.015m to well outside,
Time step is 1.0 μ s.Geological interface is distributed in the right side of logger；The monopole transmitters centre frequency of logger is
8kHz, receiver array in the side of sound source, each receiver containing four receiving units shown in Fig. 2 (P1, P2, P3,
P4).The velocity of longitudinal wave on stratum 1 is 3000m/s, shear wave velocity 1800m/s, density 2000kg/m3；The compressional wave speed on stratum 2
Degree and shear wave velocity are then 4500m/s and 2650m/s respectively, density 2400kg/m3；The velocity of sound of FIH is 1500m/s,
Density is 1000kg/m3.
Arrange that monopole excites wave field in well, four receiving units corresponding to each receiver gather well logging number respectively
According to.The data received to four receiving units (P1, P2, P3, P4) are combined, and respectively obtain three groups of data：Acyclic type receives
Data, X-direction dipole type receive data, and Y-direction dipole type receives data.
It is the data obtained under conventional data acquisition pattern, i.e. conventional logging data that acyclic type, which receives data,；X-direction and Y
It is the data obtained using monopole dipole mixed mode of operation that direction dipole type, which receives data, i.e., far detects log data.
When Fig. 6 is monopole provided in an embodiment of the present invention, conventional logging waveform.Theoretical calculation is also show in Fig. 6
The then curve of direct wave in different type well is obtained, it is preferably corresponding with analog result.It is it will be seen from figure 6 that conventional even
Contain direct wave in the wells such as compressional wave, shear wave and Stoneley wave in pole wavelet (i.e. conventional logging data)；And with direct wave phase in well
Than the echo amplitude come outside artesian well is very small, and this is mainly due to the impedance contrast in fast stratum between well and stratum is larger, in well
The acoustic energy being radiated outside well is limited.And under actual conditions, if considering decay, the amplitude of back wave will be smaller.And come from
Stoneley wave overlaps in back wave and well outside well, thus causes difficulty with extraction to follow-up back wave record.
From this, the waveform gathered under conventional logging pattern is mainly direct wave in well, it can be used for traditional acoustic logging operation, such as
The measurement of formation velocity and the extraction of formation parameter (porosity, permeability).
When Fig. 7 is monopole provided in an embodiment of the present invention, remote detection well logging waveform, in the figure 7, waveform is received as the
One receiving unit P1 and the 3rd two receiving units of receiving unit P3 difference.The process of difference is asked to decay the first receiving unit and the
Polarity identical signal (being mainly direct-path signal in the well that monopole excites in this example) on three receiving units, therefore originally
The back wave fallen into oblivion under the very strong Stoneley wave of amplitude is shown.The then curve that theory of correspondences calculates can be identified clearly
Go out well external reflectance compressional wave and reflection wave, reflected signal is sent into analog-digital converter and quantified after gain-adjusted, finally will amount
Digitalized data after change travels to surface acquisition system.To mixed mode of operation collection comprising stratum reflection wave signal
Data are analyzed and processed, and can further obtain the accurate location of geology reflecting interface.
In order to which the operation principle of the present invention is expanded on further, extract what is received apart from receiver at 4.5 meters of sound source
Waveform, as shown in figure 8, when Fig. 8 is monopole provided in an embodiment of the present invention, the receiving unit P1 and P3 at sound source 4.5m
Respective waveform subtracts each other resulting waveform with it, and in fig. 8, dotted line represents the ripple that single receiving unit (P1 or P3) receives
Shape, solid line are that two receiving units subtract each other the waveform that (P1-P3) is obtained.As can be seen from Figure 8, the first receiving unit P1 is represented
Two articles of dotted lines of waveform and the 3rd receiving unit P3 waveforms are almost completely superposed, and this is due to：In the wave field that monopole excites,
It is identical with direct wave response in the well that P3 is received on the symmetrical two receiving unit P1 of borehole axis positioned at same depth,
And the direct wave that two receiving units receive is occupied an leading position (amplitude for being much larger than back wave) in waveform, therefore first receives
Unit P1 almost overlaps with what the 3rd receiving unit P3 waveforms showed.And by subtracting each other, the first receiving unit P1 and the 3rd is received
Polarity identical signal is weakened (being mainly direct wave in the well excited by monopole here) in unit P3, only remaining Fig. 8
In well external reflectance ripple shown in solid.From this, excited by monopole, the mixed mode of operation that dipole receives, outside well
Back wave has enhancing relative to the amplitude of direct wave in well, is advantageous to the extraction of reflection wave signal with separating.
In addition, in comparison diagram 6 Stoneley wave then with Fig. 7 reflected P-wave then understand, for apart from borehole axis compared with
Near reflector (being 3 meters in the present embodiment), the aliasing in the range of survey well constraint inversion is more serious with direct wave in well for back wave, it is difficult to
Efficiently separate.Excited by monopole, the mixed mode of operation that dipole receives, reflected signal corresponding to the reflector also may be used
To carry out accurate recording.
Second of situation：
In the case of dipole source, computation model is as shown in Figure 5.Using Moving grids finite difference, near wellbore grid is
0.01m, remotely grid is 0.015m to well outside, and time step is 1.2 μ s.Dipole source is oriented to X-axis, centre frequency 3kHz.
The velocity of longitudinal wave on stratum 1 is 2000m/s, shear wave velocity 600m/s, density 2000kg/m3；The velocity of longitudinal wave on stratum 2 and horizontal stroke
Wave velocity is then 3800m/s and 2000m/s respectively, density 2150kg/m3；The velocity of sound of FIH is 1500m/s, and density is
1000kg/m3.Other specification is identical with parameter during monopole situation.
Arrange that dipole source excites wave field in well, four receiving units corresponding to each receiver gather well logging number respectively
According to.The data received to four receiving units (P1, P2, P3, P4) are combined, and respectively obtain three groups of data：Acyclic type receives
Data, X-direction dipole type receive data, and Y-direction dipole type receives data.
When sound source is dipole source, from S103：It is conventional data acquisition that X-direction Y-direction dipole type, which receives data,
The data obtained under pattern, i.e. conventional logging data；Acyclic type receives data to be obtained using monopole dipole mixed mode of operation
Data, for remote detection log data.
When Fig. 9 is dipole source provided in an embodiment of the present invention, conventional logging waveform.It is as it can be seen in figure 9 that conventional even
Containing direct wave in the wells such as compressional wave and bending wave in the wavelet row of pole, and bend intensity of wave and be more than well external reflectance compressional wave, conventional logging
The dipole waveform gathered under pattern can be used for conventional dipole logging operation, such as formation shear speed and formation anisotropy
The measurement of parameter.In the present embodiment, well external reflectance compressional wave can be identified from conventional logging waveform, this is due to slowly in layer
Impedance is smaller between well and stratum, thus the intensity of back wave is greater than the situation on fast stratum in the first situation, and this is also remote
Detection Techniques are in slowly layer using a reason for being better than fast stratum.
When Figure 10 is dipole source provided in an embodiment of the present invention, remote detection well logging waveform.In Fig. 10, four are received
The waveform of unit is overlapped, and it (is mainly that dipole source swashs in the present embodiment to weaken opposite polarity signal in each receiving unit
Direct wave in the well of hair), direct wave is effectively suppressed in well, and well external reflectance ripple has relative to the amplitude of mode wave in well
Largely improve.
Figure 11 is well logging apparatus schematic diagram provided in an embodiment of the present invention, and as shown in figure 11, the present embodiment includes：Arrangement
Unit 1101, collecting unit 1102, assembled unit 1103, generation unit 1104；
The arrangement unit 1101, for arranging sound source and at least one receiver in well to be detected, wherein, it is described to connect
Receiving device includes four receiving units being circumferentially equidistantly spaced from, and the first receiving unit and the 3rd in four receiving units connects
Receive unit and be located at X-axis, the second receiving unit and the 4th receiving unit in four receiving units are located at Y-axis；
The collecting unit 1102, for when the sound source excites wave field, the first receiving unit collection first to be surveyed
Well data, the second receiving unit gather the second log data, and the 3rd receiving unit gathers the 3rd log data, the 4th receiving unit
Gather the 4th log data；
The assembled unit 1103, for first log data, the second log data, the 3rd log data and
Four log datas are combined, and are obtained acyclic type and are received data, X-direction dipole type reception data and Y-direction dipole type reception number
According to；
The generation unit 1104, data, X-direction dipole are received for the form according to the sound source and the acyclic type
Formula receives data, and Y-direction dipole type receives data, obtains conventional logging data and remote detection log data.
Alternatively, the sound source specifically includes：Monopole or dipole source.
Alternatively, the assembled unit 1103 is specifically used for,
Acquisition list is added with the 4th log data to first log data, the second log data, the 3rd log data
Pole formula receives data；
First log data and the 3rd log data are subtracted each other and obtain X-direction dipole type reception data；
Second log data and the 4th log data are subtracted each other and obtain Y-direction dipole type reception data.
Alternatively, the generation unit 1104 is specifically used for, and when the sound source is monopole, the acyclic type receives
Data are conventional logging data, and the X-direction dipole type receives data and the Y-direction dipole type receives data and surveyed for remote detection
Well data.
Alternatively, the generation unit 1104 is specifically used for, and when the sound source is dipole source, the acyclic type receives
Data are remote detection log data, and the X-direction dipole type receives data and the Y-direction dipole type receives data and surveyed to be conventional
Well data.
Professional should further appreciate that, each example described with reference to the embodiments described herein
Unit and algorithm steps, it can be realized with electronic hardware, computer software or the combination of the two, it is hard in order to clearly demonstrate
The interchangeability of part and software, the composition and step of each example are generally described according to function in the above description.
These functions are performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.
Professional and technical personnel can realize described function using distinct methods to each specific application, but this realization
It is it is not considered that beyond the scope of this invention.
The method that is described with reference to the embodiments described herein can use hardware, computing device the step of algorithm
Software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only storage
(ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium well known to interior.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (2)
1. a kind of single dipole mixed method for being used to far detect well logging, it is characterised in that methods described includes：
Sound source and at least one receiver are arranged in well to be detected, wherein, the receiver includes what is be circumferentially equidistantly spaced from
Four receiving units, the first receiving unit and the 3rd receiving unit in four receiving units are located at X-axis, and described four connect
Receive the second receiving unit in unit and the 4th receiving unit is located at Y-axis；
When the sound source excites wave field, first receiving unit gathers the first log data, the second receiving unit collection the
Two log datas, the 3rd receiving unit gather the 3rd log data, and the 4th receiving unit gathers the 4th log data；
First log data, the second log data, the 3rd log data and the 4th log data are combined, obtained single
Pole formula receives data, X-direction dipole type receives data and Y-direction dipole type receives data；
Data are received according to the form of the sound source and the acyclic type, X-direction dipole type receives data, Y-direction dipole type connects
Data are received, obtain conventional logging data and remote detection log data；
Wherein, it is single that acquisition is added with the 4th log data to first log data, the second log data, the 3rd log data
Pole formula receives data；
First log data and the 3rd log data are subtracted each other and obtain X-direction dipole type reception data；
Second log data and the 4th log data are subtracted each other and obtain Y-direction dipole type reception data；
The sound source specifically includes：Monopole and dipole source；
Wherein, when the sound source is monopole, it is conventional logging data that the acyclic type, which receives data, and the X-direction is even
Pole formula receives data and the Y-direction dipole type receives data as remote detection log data；When the sound source is dipole source,
The acyclic type receives data as remote detection log data, and the X-direction dipole type receives data and the Y-direction dipole type connects
Receipts data are conventional logging data；The conventional logging data and the remote detection log data are carried out data transmission and located
Reason；
Wherein, to the conventional logging real-time data transmission and in-situ processing, and application conventional logging processing software is evaluated；
The remote detection log data is handled, if data transmission bauds meets to require, real-time Transmission is carried out, if the transmission
Speed is unsatisfactory for requiring, is then stored in instrument, concentrates reading, and the remote detection logging data processing of application again after being all measured
Software is evaluated；
The remote detection log data, for direct-path signal in well of decaying, determines reflected signal, the reflected signal is carried out
After gain-adjusted, send to analog-digital converter and quantified, obtain back wave quantized data；Wherein, the reflected signal includes：
Well external reflectance compressional wave and reflection wave.
2. a kind of single dipole mixing arrangement for being used to far detect well logging, it is characterised in that described device includes：Arrangement unit, adopt
Collect unit, assembled unit, generation unit；
The arrangement unit, for arranging sound source and at least one receiver in well to be detected, wherein, the receiver includes
Four receiving units being circumferentially equidistantly spaced from, the first receiving unit and the 3rd receiving unit position in four receiving units
The second receiving unit and the 4th receiving unit in X-axis, four receiving units are located at Y-axis；
The collecting unit, for when the sound source excites wave field, first receiving unit gathers the first log data, the
Two receiving units gather the second log data, and the 3rd receiving unit gathers the 3rd log data, the 4th receiving unit collection the 4th
Log data；
The assembled unit, for first log data, the second log data, the 3rd log data and the 4th well logging number
According to being combined, obtain acyclic type and receive data, X-direction dipole type reception data and Y-direction dipole type reception data；
The assembled unit is specifically used for, and first log data, the second log data, the 3rd log data and the 4th are surveyed
Well data, which are added, obtains acyclic type reception data；
First log data and the 3rd log data are subtracted each other and obtain X-direction dipole type reception data；
Second log data and the 4th log data are subtracted each other and obtain Y-direction dipole type reception data；
The generation unit, data are received for the form according to the sound source and the acyclic type, X-direction dipole type receives number
According to Y-direction dipole type receives data, obtains conventional logging data and remote detection log data；The sound source specifically includes：Monopole
Component and dipole source；Wherein, the generation unit is specifically used for, and when the sound source is monopole, the acyclic type connects
Receipts data are conventional logging data, and the X-direction dipole type receives data and the Y-direction dipole type receives data as remote detection
Log data；When the sound source is dipole source, the acyclic type receives data as remote detection log data, the X-direction
It is conventional logging data that dipole type, which receives data and Y-direction dipole type reception data,；To the conventional logging data and institute
Remote detection log data is stated to carry out data transmission and handle；
The generation unit is specifically used for, and to the conventional logging real-time data transmission and in-situ processing, and applies conventional logging
Processing software is evaluated；The remote detection log data is handled, if data transmission bauds meets to require, carried out real
When transmit, if the transmission speed is unsatisfactory for requiring, be stored in instrument, after all be measured after concentrate reading again, and
Evaluated using remote detection logging data processing software；The remote detection log data, for direct-path signal in well of decaying, it is determined that
Reflected signal, after the reflected signal is carried out into gain-adjusted, send to analog-digital converter and quantified, obtain back wave and quantify
Data；Wherein, the reflected signal includes：Well external reflectance compressional wave and reflection wave.
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| CN201410705333.4A CN104483707B (en) | 2014-11-26 | 2014-11-26 | A kind of single dipole mixed method and device for being used to far detect well logging |
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| CN201410705333.4A CN104483707B (en) | 2014-11-26 | 2014-11-26 | A kind of single dipole mixed method and device for being used to far detect well logging |
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| CN104483707B true CN104483707B (en) | 2018-03-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4813028A (en) * | 1987-07-07 | 1989-03-14 | Schlumberger Technology Corporation | Acoustic well logging method and apparatus |
| US6474439B1 (en) * | 2000-03-29 | 2002-11-05 | Schlumberger Technology Corporation | Dipole logging tool |
| CA2429182C (en) * | 2000-11-16 | 2013-01-22 | Schlumberger Canada Limited | Sonic logging tool including receiver and spacer structure |
| US7035165B2 (en) * | 2003-01-29 | 2006-04-25 | Baker Hughes Incorporated | Imaging near-borehole structure using directional acoustic-wave measurement |
| CN2621300Y (en) * | 2003-06-03 | 2004-06-23 | 中海油田服务股份有限公司 | Multi-polar subarray acoustic logging transducer |
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