CN104712331B - A kind of well arm imaging well logging apparatus and method - Google Patents
A kind of well arm imaging well logging apparatus and method Download PDFInfo
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- CN104712331B CN104712331B CN201510065194.8A CN201510065194A CN104712331B CN 104712331 B CN104712331 B CN 104712331B CN 201510065194 A CN201510065194 A CN 201510065194A CN 104712331 B CN104712331 B CN 104712331B
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- 238000003384 imaging method Methods 0.000 title claims abstract description 49
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- 230000004044 response Effects 0.000 claims abstract description 43
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000005284 excitation Effects 0.000 claims description 25
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- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005755 formation reaction Methods 0.000 description 14
- 238000005553 drilling Methods 0.000 description 7
- 238000011835 investigation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
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- 238000002156 mixing Methods 0.000 description 2
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- 229920002472 Starch Polymers 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
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Abstract
The invention discloses a kind of well arm imaging well logging apparatus and method, including：Telescoping ram, electronic cartridge and return electrode.One end of telescoping ram and one end of electronic cartridge are connected, including multiple adjustable measuring pads, and the mixed frequency signal of multi-frequency or the swept-frequency signal of various frequencies are launched to borehole wall stratum.One end of return electrode and the other end of electronic cartridge are connected, including multiple adjustable horns, receive mixed frequency signal or swept-frequency signal transmits the multi-frequency response signal returned behind stretch footpath in borehole wall stratum.Processor is built-in with electronic cartridge, the multi-frequency response signal is received and calculates borehole wall formation resistivity, borehole wall stratum dielectric constant, and mud resistivity, mud dielectric constant, obtain borehole wall two dimensional image.Influence of the key factor such as formation resistivity, stratum dielectric constant, mud resistivity, mud dielectric constant, the borehole wall and electrode gap to imaging measurement can be overcome, and improve non-conductive mud borehole wall imaging effect.
Description
Technical field
The present invention relates to petroleum well logging technology, more particularly to a kind of bottom hole path apparatus and method.
Background technology
In present mud bottom hole path technology, generally using conductive drilling mud borehole wall imaging technique.Conductive drilling mud
Imaging technique belongs to the category of direct current electric logging, and this is required must be full of the wellbore fluids such as conductive mud or water, ability in well
Measurement electric current can be made to enter stratum in well, the purpose of Formation Resistivity Measurement is reached.But, for some information wells, in order to
The initial oil saturation on stratum is understood exactly or keeps the primary permeability on stratum, it is often (that is, oily using non-conductive mud
Base mud and synthesis mud), to improve drilling efficiency and to reduce the unstability of the borehole wall.But non-conductive mud is used, mud
Starch electric conductivity to be deteriorated, the electric current of the button electrode in the conventional device for being carried out borehole wall imaging using conductive drilling mud is difficult to from well
Eye enters stratum；This allows for running into the difficulty that can not be overcome using the borehole wall imaging that non-conductive mud carries out direct current electric logging.
In addition, under non-conductive mud environment, the measurement of borehole wall imaging also by formation resistivity, stratum dielectric constant,
The key factors such as mud resistivity, mud dielectric constant, the borehole wall and imaging electrode gap length influence, conventional utilization conducting mud
The technology that slurry carries out borehole wall imaging can not accurately calculate above-mentioned influence factor, meet the borehole wall under non-conductive mud hole condition into
The measurement demand of picture.
Further, the conventional technology for carrying out borehole wall imaging using conductive drilling mud is only capable of carrying out well to conductive drilling mud well
Wall two-dimensional conductivity is imaged, but borehole wall imaging is only carried out with information as electrical conductivity and is unfavorable for geologists to storage
Layer carries out comprehensive evaluation.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of multifrequency non-conductive mud bottom hole path device and side
Method, can solve the problem that formation resistivity, stratum dielectric constant, mud resistivity, mud dielectric constant, the borehole wall and electrode gap etc. are joined
Several influences to borehole wall imaging measurement, preferably meet the borehole wall Electrical imaging measurement demand under non-conductive mud hole condition.
In order to achieve the above object, the present invention proposes a kind of well arm imaging well logging apparatus, and the device includes telescoping ram, electricity
Sub-line is short out section and return electrode；
One end of telescoping ram is fixedly connected with one end of electronic cartridge, including multiple adjustable measuring pads, often
Individual measuring pad be used for by regulation with the borehole wall of fitting, and to borehole wall stratum launch multi-frequency mixed frequency signal or various frequencies
The swept-frequency signal of rate；
One end of return electrode is fixedly connected with the other end of electronic cartridge, including multiple adjustable horns, often
Individual horn is used to receiving the mixed frequency signal or swept-frequency signal transmits returned behind stretch footpath many in the borehole wall stratum
Frequency response induction signal；The return electrode also includes center-pole, is socketed in the spring and sliding block at center-pole two ends, the center-pole
One end is connected with the electronic cartridge, the end tail phase of the other end and the multifrequency non-conductive mud well arm imaging well logging apparatus
Even, for supporting the horn, the spring and the sliding block；The two ends of the horn are separately mounted to the center-pole
On two sliding blocks at two ends；One end of two springs is separately fixed on the centre position of the center-pole, another
End is connected with two sliding blocks respectively, for carrying out telescopic adjustment to the horn by the sliding block；
Processor is built-in with electronic cartridge, processor is used to receive multi-frequency response signal, and based on multifrequency response
Signal of change borehole wall formation resistivity, borehole wall stratum dielectric constant, and mud resistivity, mud dielectric constant, obtain the borehole wall
Two dimensional image.
Preferably, telescoping ram includes measuring pad, and the measuring pad includes multi-frequency excitation signal generator module, outside pole plate
Shell and microelectrode array；
Multi-frequency excitation signal generator module, is connected with electronic cartridge and microelectrode array, for receiving electric wire
Short out to save after the control signal sent, the mixing for launching multi-frequency to borehole wall stratum by pole plate shell and microelectrode array is believed
Number or various frequencies swept-frequency signal；
Pole plate shell, for installing and protecting multi-frequency excitation signal generator module and microelectrode array.
Preferably, telescoping ram also includes fix bar, slide bar, sliding groove, rotating shaft and the first support being sequentially connected, second
Support and the 3rd support；
One end of fix bar is connected with the electronic cartridge, and the other end is connected with one end of slide bar, slide bar it is another
End is connected with the termination of multifrequency non-conductive mud well arm imaging well logging apparatus；
Three supports are connected with each other by the rotating shaft respectively, and with axis of rotation, one is provided with each second support
Individual measuring pad；
Wherein, one end not being connected with second support of first support is fixedly installed in fix bar, the 3rd support
The one end not being connected with second support is slidably mounted within the sliding groove on slide bar.
Preferably, 6 measuring pads are included on telescoping ram；Each measuring pad includes a multi-frequency excitation signal and produces mould
Block and a microelectrode array, a microelectrode array include 15 microelectrodes.
Preferably, processor includes the multi-frequency response signal detection module and main control module being connected with each other；
Multi-frequency response signal detection module, is connected with return electrode, and the borehole wall stratum for receiving return electrode transmission is returned
The mixed frequency signal returned or the swept-frequency signal；
Main control module be used for the mixed frequency signal that borehole wall stratum is returned received from multi-frequency response signal detection module or
The amplitude and phase of signal are gathered in swept-frequency signal；Amplitude and phase to signal are calculated, and result of calculation is transmitted into institute
State host computer；It is additionally operable to receive the order that host computer is sent, order includes making multi-frequency excitation signal generator module launch a variety of frequencies
The control information of the swept-frequency signal of the mixed frequency signal of rate or various frequencies, and the mixed frequency signal launched or various frequencies
Swept-frequency signal amplitude and phase information.
Preferably, the present invention also proposes a kind of well arm imaging logging method based on above-mentioned well arm imaging well logging apparatus, should
Method includes：
The support that well arm imaging logger enters on spring and telescoping ram on well, return electrode changes according to the borehole wall to be carried out
Slide and telescopic adjustment, the horn on return electrode is close to the borehole wall with the measuring pad on telescoping ram；
Measuring pad launches the mixed frequency signal of multi-frequency or the swept-frequency signal of various frequencies to borehole wall stratum；
Horn receives mixed frequency signal or swept-frequency signal transmits the multifrequency response returned behind stretch footpath in borehole wall stratum
Signal；
Processor in electronic cartridge receives multi-frequency response signal, and calculates borehole wall stratum based on multi-frequency response signal
Resistivity, borehole wall stratum dielectric constant, and mud resistivity, mud dielectric constant, obtain borehole wall two dimensional image.
Preferably, this method also includes, and it is short out that the multi-frequency excitation signal generator module in measuring pad receives electric wire
Save after the control signal sent, launch the mixed frequency signal or various frequencies of multi-frequency to borehole wall stratum by microelectrode array
Swept-frequency signal.
Preferably, this method also includes, in the sliding groove of the 3rd support of telescoping ram on slide bar according to the borehole wall change into
Line slip and telescopic adjustment.
Preferably, this method also includes, and the multi-frequency response signal detection module of processor receives the well that return electrode is sent
The mixed frequency signal or swept-frequency signal that wall stratum is returned；
The mixing letter that the main control module of processor is returned from the borehole wall stratum that multi-frequency response signal detection module is received
Number or swept-frequency signal in gather signal amplitude and phase；Amplitude and phase to signal are calculated, and result of calculation is passed
To host computer；And the order of host computer transmission is received, the order includes making multi-frequency excitation signal generator module launch a variety of frequencies
The control information of the swept-frequency signal of the mixed frequency signal of rate or various frequencies, and the mixed frequency signal or various launched
The amplitude and phase information of the swept-frequency signal of frequency.
Compared with prior art, the present invention includes：Telescoping ram, electronic cartridge and return electrode.One end of telescoping ram
It is connected with one end of electronic cartridge, including multiple adjustable measuring pads, launch the mixed of multi-frequency to borehole wall stratum
The swept-frequency signal of frequency signal or various frequencies.One end of return electrode and the other end of electronic cartridge are connected, including many
Individual adjustable horn, receives mixed frequency signal or swept-frequency signal transmits the multifrequency response returned behind stretch footpath in borehole wall stratum
Signal.Processor is built-in with electronic cartridge, the multi-frequency response signal is received and with calculating borehole wall formation resistivity, the borehole wall
Layer dielectric constant, and mud resistivity, mud dielectric constant, obtain borehole wall two dimensional image.Can overcome formation resistivity,
The influences of the key factor to imaging measurement such as layer dielectric constant, mud resistivity, mud dielectric constant, the borehole wall and electrode gap,
And improve non-conductive mud borehole wall imaging effect.
Brief description of the drawings
The accompanying drawing in the embodiment of the present invention is illustrated below, the accompanying drawing in embodiment is for entering one to the present invention
Step understands, is used to explain the present invention together with specification, does not constitute limiting the scope of the invention.
Fig. 1 is bottom hole path apparatus structure schematic diagram of the present invention；
Fig. 2 is bottom hole path measurement device theory diagram of the present invention；
Fig. 3 is bottom hole path method flow diagram of the present invention.
Embodiment
For the ease of the understanding of those skilled in the art, the invention will be further described below in conjunction with the accompanying drawings, not
It can be used for limiting the scope of the invention.
Non-conductive mud have make bit speed faster, the borehole wall is more stable, more regular, can significantly save drilling well into
This, therefore, non-conductive mud is widely used.It is wide with non-conductive muds such as oil-base mud, artificial synthesized mud
General application, non-conductive mud borehole wall Electrical imaging measurement is increasingly becoming a unavoidable technical barrier, is recent year
One study hotspot of outer well logging field.
As shown in figure 1, the present invention proposes a kind of well arm imaging well logging apparatus, the device includes telescoping ram 03, electric wire
Short out section 02 and return electrode 01.
One end of telescoping ram 03 is fixedly connected with one end of electronic cartridge 02, including multiple adjustable measuring pads
031, each measuring pad 031 be used for by regulation with the borehole wall of fitting, and to borehole wall stratum launch multi-frequency mixed frequency signal
Or the swept-frequency signal of various frequencies.
Traditional electric imaging logging is logged well using single-frequency；Although the longitudinal direction that electric imaging logging instrument utensil has had point
Resolution and orientation coverage rate, but be due to the anisotropic property on stratum, cause the decay of measurement signal, depth can not be taken into account
Measurement.Then the present invention to take into account investigation depth, longitudinal resolution simultaneously using multiple frequencies (frequency is different, and investigation depth is different)
Rate and orientation covering, obtain more fully reliable wellbore information, preferably carry out borehole image.
Preferably, telescoping ram 03 includes measuring pad 031, and the measuring pad 031 includes multi-frequency excitation signal generator module
0312nd, pole plate shell 0313 and microelectrode array 0311.
Multi-frequency excitation signal generator module 0312, is connected with electronic cartridge 02 and microelectrode array 0311, for connecing
Receive after the control signal that electronic cartridge 02 is sent, by the pole plate shell 0313 and microelectrode array 0311 to the borehole wall
The mixed frequency signal of stratum transmitting multi-frequency or the swept-frequency signal of various frequencies.
As shown in Fig. 2 multi-frequency excitation signal generator module 0312 is while producing the mixed frequency signal of multi-frequency, Huo Zhefen
When produce the swept-frequency signals of various frequencies.
Pole plate shell 0313, for installing and protecting multi-frequency excitation signal generator module 0312 and microelectrode array 0311.
Preferably, telescoping ram 03 also includes fix bar 032, slide bar 033, sliding groove 034, rotating shaft 038 and is sequentially connected
First support 035, the support 037 of second support 036 and the 3rd.
One end of fix bar 032 is connected with electronic cartridge 02, and the other end is connected with one end of slide bar 033, slide bar 033
The other end be connected with the termination 04 of multifrequency non-conductive mud well arm imaging well logging apparatus.
Three support 035-037 are connected with each other by rotating shaft 038 respectively, and are rotated with rotating shaft 038, each second support
One measuring pad 031 is installed on 036.
Wherein, one end not being connected with second support 036 of first support 035 is fixedly installed in fix bar 032, the
One end not being connected with second support 036 of three supports 037 is slidably mounted within the sliding groove 034 on slide bar 033.
Preferably, 6 measuring pads are included on telescoping ram 03；Each measuring pad 031 includes a multi-frequency excitation signal
Generation module 0312 and a microelectrode array 0311, a microelectrode array 0311 include 15 microelectrodes.
One end of return electrode 01 is fixedly connected with the other end of electronic cartridge 02, including multiple adjustable horns
011, each horn 011 is transmitted behind stretch footpath for receiving mixed frequency signal or swept-frequency signal in the borehole wall stratum
The multi-frequency response signal of return.
By setting return electrode 01 farther out, investigation depth is added；And use multi-frequency synchronous or scanning survey
The mode of amount is scanned detection to well week, and the dynamic range of increase instrument investigation depth from shallow to deep improves instrument signal to noise ratio；
Thus overcome well mud to disturb, reduce dead time, and improve to areolate resolution capability；It is final to solve formation resistivity
The parameters such as rate, stratum dielectric constant, mud resistivity, mud dielectric constant, the borehole wall and electrode gap are to borehole wall imaging measurement
Influence.
Preferably, return electrode 01 also includes center-pole 012, is socketed in the spring 013 and sliding block at the two ends of center-pole 012
014。
Center-pole 012, one end is connected with electronic cartridge 02, and the other end is logged well with multifrequency non-conductive mud well arm imaging
The end tail 05 of device is connected, for supporting horn 011, spring 013 and sliding block 014.
Horn 011, two ends are separately mounted on two sliding blocks 014 at the two ends of center-pole 012.The horn 011 is general
It is 6 or 4 or 8.
Two springs 013, one end is separately fixed on the centre position of center-pole 012, the other end respectively with two sliding blocks
014 connection, for carrying out telescopic adjustment to horn 011 by sliding block 014.
Processor 021 is built-in with electronic cartridge 02, processor 021 is used to receive multi-frequency response signal, and is based on
Multi-frequency response signal calculating borehole wall formation resistivity, borehole wall stratum dielectric constant, and mud resistivity, mud dielectric are normal
Number, to obtain borehole wall two dimensional image.
Most Well Logging Data Processing Softwares is all converted to impedance magnitude or extraction to measure obtained electrical conductivity at present
Impedance real part data carry out imaging explanation.The former contains stratum dielectric constant information, in the stratum influenceed by dielectric constant
It is imaged and does not represent real formation resistivity；And the latter is only imaged with real part information, then stratum has been abandoned completely
Dielectric constant information, but dielectric constant in some special formations can cause the change of response signal real part and imaginary part, and it is empty
Portion's change is significantly greater than real part change, it follows that the property of can not ignore of imaginary signals change.Therefore only entered with electrical conductivity information
Row imaging is unfavorable for geologists and carries out comprehensive evaluation to reservoir.Therefore, this instrument is utilized under multi-frequency
Obtained comprehensive wellbore information (impedance, voltage, electric current, phase information etc.) of logging well, which extract, obtains respective dielectric constant correspondence
Response signal, and to this progress inverting extract stratum dielectric constant, thus carry out dielectric constant imaging.
Preferably, processor 021 includes the multi-frequency response signal detection module 0212 and main control module being connected with each other
0211。
Multi-frequency response signal detection module 0212, is connected with return electrode 01, the well for receiving the transmission of return electrode 01
Mixed frequency signal or swept-frequency signal that wall stratum is returned.
Main control module 0211
The mixed frequency signal or frequency sweep letter returned for the borehole wall stratum received from multi-frequency response signal detection module 0212
The amplitude and phase of signal are gathered in number.The amplitude of signal and phase are calculated, resistivity, the dielectric on all stratum of well is obtained
The physical quantity variation of constant, and result of calculation is transmitted to the host computer；It is additionally operable to receive the order that host computer is sent, the order
Including making multi-frequency excitation signal generator module 0312 launch the mixed frequency signal of multi-frequency or the swept-frequency signal of various frequencies
Control information, and the mixed frequency signal or the amplitude and phase information of the swept-frequency signal of various frequencies launched.
The invention also provides a kind of well arm imaging logging method based on above-mentioned well arm imaging well logging apparatus, this method bag
Include following steps：
Step S101, well arm imaging logger enters the spring 013 on well, return electrode 01 and the support on telescoping ram 03
035-037 changes into line slip and telescopic adjustment according to the borehole wall, makes on the horn 011 and telescoping ram 03 on return electrode 01
Measuring pad 031 is close to the borehole wall.
Support 035-037 on horn 011 and telescoping ram 03 can also be provided most in the case where being collapsed even if well
Good return electrode 01 and measuring pad 031 is positioned.
Step S102, measuring pad 031 launches the mixed frequency signal of multi-frequency or sweeping for various frequencies to borehole wall stratum
Frequency signal.
Traditional electric imaging logging is logged well using single-frequency；Although the longitudinal direction that electric imaging logging instrument utensil has had point
Resolution and orientation coverage rate, but be due to the anisotropic property on stratum, cause the decay of measurement signal, depth can not be taken into account
Measurement.Then the present invention to take into account investigation depth, longitudinal resolution simultaneously using multiple frequencies (frequency is different, and investigation depth is different)
Rate and orientation covering, obtain more fully reliable wellbore information, preferably carry out borehole image.
Step S103, horn 031 receives the mixed frequency signal or the swept-frequency signal transmits stretch footpath in borehole wall stratum
The multi-frequency response signal returned afterwards.
Processor 021 in step S104, electronic cartridge 02 receives the multi-frequency response signal, and based on many frequency responses
Induction signal calculates borehole wall formation resistivity, borehole wall stratum dielectric constant, and mud resistivity, mud dielectric constant, obtains well
Wall two dimensional image.
Most Well Logging Data Processing Softwares is all converted to impedance magnitude or extraction to measure obtained electrical conductivity at present
Impedance real part data carry out imaging explanation.The former contains stratum dielectric constant information, in the stratum influenceed by dielectric constant
It is imaged and does not represent real formation resistivity；And the latter is only imaged with real part information, then stratum has been abandoned completely
Dielectric constant information, but dielectric constant in some special formations can cause the change of response signal real part and imaginary part, and it is empty
Portion's change is significantly greater than real part change, it follows that the property of can not ignore of imaginary signals change.Therefore only entered with electrical conductivity information
Row imaging is unfavorable for geologists and carries out comprehensive evaluation to reservoir.Therefore, this instrument is utilized under multi-frequency
Obtained comprehensive wellbore information (impedance, voltage, electric current, phase information etc.) of logging well, which extract, obtains respective dielectric constant correspondence
Response signal, and to this progress inverting extract stratum dielectric constant, thus carry out dielectric constant imaging.
Preferably, this method also includes, and will push against device 03 and is set to include measuring pad 031, measuring pad 031 includes many
Frequency pumping signal generation module 0312, microelectrode array 0311 and install and protect the and of multi-frequency excitation signal generator module 0312
The pole plate shell of microelectrode array 0311.
Multi-frequency excitation signal generator module 0312 is received after the control signal that the electronic cartridge 02 is sent, and is passed through
The microelectrode array 0311 launches the mixed frequency signal of multi-frequency or the swept-frequency signal of various frequencies to borehole wall stratum.
As shown in Fig. 2 multi-frequency excitation signal generator module 0312 is while producing the mixed frequency signal of multi-frequency, Huo Zhefen
When produce the swept-frequency signals of various frequencies.
Preferably, this method also includes, and will push against device 03 and is set to also include fix bar 032, slide bar 033, sliding groove
034th, rotating shaft 038 and be sequentially connected first support 035, the support 037 of second support 036 and the 3rd.
Change in sliding groove 034 of 3rd support 037 on slide bar 033 according to the borehole wall into line slip and telescopic adjustment.
Preferably, this method also includes, and will push against device 03 and is set to include 6 measuring pads 031；Each measuring pad
031 includes a multi-frequency excitation signal generator module 0312 and a microelectrode array 0311, a microelectrode array 0311
Including 15 microelectrodes.
Processor 021 is set to the multi-frequency response signal detection module 0212 and main control module for including being connected with each other
0211。
Multi-frequency response signal detection module 0212 receive return electrode 01 send borehole wall stratum return mixed frequency signal or
Swept-frequency signal.
As shown in Fig. 2 multi-frequency response signal detection module is while detecting the mixed frequency signal of multi-frequency, or timesharing is examined
Survey the swept-frequency signal of various frequencies.
Preferably, this method also includes, main control module 0211
The mixed frequency signal or sweep that the borehole wall stratum received from multi-frequency response signal detection module 0212 is returned
The amplitude and phase of signal are gathered in frequency signal.
Amplitude and phase to signal are calculated, and obtain electrical conductivity, the physical quantity variation of dielectric constant on all stratum of well,
And result of calculation is transmitted to the host computer, and the order of host computer transmission is received, the order includes making multi-frequency excitation signal
The control information of the mixed frequency signal of the transmitting multi-frequency of generation module 0312 or the swept-frequency signal of various frequencies, and launched
Mixed frequency signal or various frequencies swept-frequency signal amplitude and phase information.
Multifrequency non-conductive mud bottom hole path device involved by the invention can more preferably overcome non-conductive mud well
The influence that various factors is imaged to the borehole wall under condition, increases substantially the degree of accuracy to all formation characteristics detections of well, improves imaging and survey
Dose-effect fruit.
It should be noted that embodiment described above be for only for ease of it will be understood by those skilled in the art that, and
It is not used in and limits the scope of the invention, on the premise of the inventive concept of the present invention is not departed from, those skilled in the art couple
Any obvious replacement and improvement that the present invention is made etc. is within protection scope of the present invention.
Claims (9)
1. a kind of well arm imaging well logging apparatus, it is characterised in that described device includes telescoping ram, electronic cartridge and backflow electricity
Pole；
One end of the telescoping ram is fixedly connected with one end of the electronic cartridge, including multiple adjustable measurement poles
Plate, each measuring pad is used for by regulation with the borehole wall of fitting, and launches to the borehole wall stratum mixed frequency signal of multi-frequency
Or the swept-frequency signal of various frequencies；
One end of the return electrode is fixedly connected with the other end of the electronic cartridge, including multiple adjustable electrodes
Arm, each horn transmits stretch for receiving the mixed frequency signal or the swept-frequency signal in the borehole wall stratum
The multi-frequency response signal returned behind footpath；The return electrode also includes center-pole, is socketed in the spring and sliding block at center-pole two ends,
One end of the center-pole is connected with the electronic cartridge, and the other end is logged well with the multifrequency non-conductive mud well arm imaging
The end tail of device is connected, for supporting the horn, the spring and the sliding block；The two ends of the horn are respectively mounted
On two sliding blocks at the center-pole two ends；One end of two springs is separately fixed at the centre of the center-pole
On position, the other end is connected with two sliding blocks respectively, for carrying out telescopic adjustment to the horn by the sliding block；
Processor is built-in with the electronic cartridge, the processor is used to receive the multi-frequency response signal, and is based on
The multi-frequency response signal calculating borehole wall formation resistivity, borehole wall stratum dielectric constant, and mud resistivity, mud dielectric are normal
Number, obtains borehole wall two dimensional image.
2. device as claimed in claim 1, it is characterised in that the telescoping ram includes the measuring pad, the measurement pole
Plate includes multi-frequency excitation signal generator module, pole plate shell and microelectrode array；
Multi-frequency excitation signal generator module, is connected with the electronic cartridge and the microelectrode array, for receiving
State after the control signal that electronic cartridge is sent, launched by the pole plate shell and the microelectrode array to borehole wall stratum
The swept-frequency signal of the mixed frequency signal of multi-frequency or various frequencies；
The pole plate shell, for installing and protecting the multi-frequency excitation signal generator module and the microelectrode array.
3. device as claimed in claim 2, it is characterised in that the telescoping ram also includes fix bar, slide bar, sliding groove, turned
Axle and the first support being sequentially connected, second support and the 3rd support；
One end of the fix bar is connected with the electronic cartridge, and the other end is connected with one end of the slide bar, the cunning
The other end of bar is connected with the termination of the multifrequency non-conductive mud well arm imaging well logging apparatus；
Three supports are connected with each other by the rotating shaft respectively, and with the axis of rotation, in each second support
One measuring pad is installed；
Wherein, one end not being connected with the second support of the first support is fixedly installed in the fix bar, institute
The one end not being connected with the second support for stating the 3rd support is slidably mounted within the sliding groove on the slide bar
In.
4. device as claimed in claim 2, it is characterised in that include 6 measuring pads on the telescoping ram；It is each to survey
Measuring pole plate includes a multi-frequency excitation signal generator module and a microelectrode array, this microelectrode battle array
Row include 15 microelectrodes.
5. device as claimed in claim 1 or 2, it is characterised in that the processor includes the multifrequency response letter being connected with each other
Number detection module and main control module；
The multi-frequency response signal detection module, is connected with the return electrode, for receiving the institute that the return electrode is sent
State the mixed frequency signal or the swept-frequency signal of borehole wall stratum return；
The main control module is used for the institute that the borehole wall stratum is returned received from the multi-frequency response signal detection module
State the amplitude and phase that the signal is gathered in mixed frequency signal or the swept-frequency signal；Amplitude and phase to the signal are carried out
Calculate, and result of calculation is transmitted to host computer；It is additionally operable to receive the order that the host computer is sent, the order is described including making
The control information of the mixed frequency signal of multi-frequency excitation signal generator module transmitting multi-frequency or the swept-frequency signal of various frequencies, with
And the mixed frequency signal or the amplitude and phase information of the swept-frequency signal of various frequencies launched.
6. a kind of well arm imaging logging method based on well arm imaging well logging apparatus described in claim 1-5 any one, it is special
Levy and be, methods described includes：
The support that well arm imaging logger enters on spring and telescoping ram on well, return electrode changes into line slip according to the borehole wall
With telescopic adjustment, the horn on the return electrode is set to be close to the borehole wall with the measuring pad on the telescoping ram；
The measuring pad launches the mixed frequency signal of multi-frequency or the swept-frequency signal of various frequencies to borehole wall stratum；
The horn reception mixed frequency signal or the swept-frequency signal are returned after transmitting stretch footpath in the borehole wall stratum
The multi-frequency response signal returned；
Processor in electronic cartridge receives the multi-frequency response signal, and calculates the borehole wall based on the multi-frequency response signal
Formation resistivity, borehole wall stratum dielectric constant, and mud resistivity, mud dielectric constant, obtain borehole wall two dimensional image.
7. method as claimed in claim 6, it is characterised in that methods described also includes,
Multi-frequency excitation signal generator module in the measuring pad receives the control signal that the electronic cartridge is sent
Afterwards, the mixed frequency signal of multi-frequency or the swept-frequency signal of various frequencies are launched to the borehole wall stratum by microelectrode array.
8. method as claimed in claim 7, it is characterised in that methods described also includes, the 3rd support of the telescoping ram exists
Change in sliding groove on slide bar according to the borehole wall into line slip and telescopic adjustment.
9. method as claimed in claim 6, it is characterised in that methods described also includes,
The multi-frequency response signal detection module of the processor receives the borehole wall stratum return that the return electrode is sent
The mixed frequency signal or the swept-frequency signal；
The main control module of the processor is returned from the borehole wall stratum that the multi-frequency response signal detection module is received
The mixed frequency signal or the swept-frequency signal in gather the amplitude and phase of the signal；To the amplitude and phase of the signal
Calculated, and result of calculation is transmitted to host computer；And the order that the host computer is sent is received, the order includes making institute
The control information of the mixed frequency signal of multi-frequency excitation signal generator module transmitting multi-frequency or the swept-frequency signal of various frequencies is stated,
And the mixed frequency signal or the amplitude and phase information of the swept-frequency signal of various frequencies launched.
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| CN105484743B (en) * | 2015-12-29 | 2019-02-19 | 广西大学 | Well logging apparatus and logging method |
| CN107907912A (en) * | 2017-12-07 | 2018-04-13 | 中石化石油工程技术服务有限公司 | High-resolution oil-base mud Electrical imaging pole plate |
| CN114233222A (en) * | 2020-11-26 | 2022-03-25 | 西安振宇电子工程有限公司 | Six-arm sidewall contact device suitable for small-diameter oil well |
| CN112782772A (en) * | 2021-01-05 | 2021-05-11 | 上海应用技术大学 | Telescopic detection electrode device for well logging |
| CN112922583A (en) * | 2021-03-01 | 2021-06-08 | 李鹏涛 | Logging device for well wall scanning imaging analysis and logging method thereof |
| CN113431555B (en) * | 2021-06-22 | 2022-07-15 | 中海油田服务股份有限公司 | While-drilling electric imaging instrument |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |