CN203603895U - Downhole measuring circuit of high-frequency array dielectric logging tool - Google Patents
Downhole measuring circuit of high-frequency array dielectric logging tool Download PDFInfo
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- CN203603895U CN203603895U CN201320819926.4U CN201320819926U CN203603895U CN 203603895 U CN203603895 U CN 203603895U CN 201320819926 U CN201320819926 U CN 201320819926U CN 203603895 U CN203603895 U CN 203603895U
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Abstract
The utility model relates to a downhole measuring circuit of a high-frequency array dielectric logging tool. The circuit comprises a synchronizing signal source, a power amplifier, a four-port coupler, a radio frequency switch, a transmitting antenna, a receiving antenna, a low-noise amplifier, a frequency mixer, a digital control gain amplifier, an analog/digital converter and a signal processor. Signals output by the synchronizing signal source enter the four-port coupler after passing the power amplifier, and then enters the transmitting antenna after passing the radio frequency switch, and signals of the coupling end of the four-port coupler sequentially enter the frequency mixer and the digital control gain amplifier after passing the low-noise amplifier. Signals received by the relieving antenna sequentially enter the low-noise amplifier, the frequency mixer and the digital control gain amplifier after passing the radio frequency switch. The output end of the digital control gain amplifier is connected with the analog/digital converter, and the output end of the analog/digital converter is connected with the signal processor. The downhole measuring circuit is large in detection depth, high in resolution ratio, and rich in supplied information.
Description
(1), technical field: the utility model relates to a kind of logging instrument circuit, particularly relates to a kind of high
Frequently the underground survey circuit of array dielectric tool.
(2), background technology: in the secondary recovery of petroleum industry and tertiary recovery, Low Resistivity Pay Zones and higher resistivity water are unrare.Utilize resistivity method to distinguish oil-water-layer and usually lost efficacy, and the relative dielectric constant of water (80 left and right) and oily relative dielectric constant (2～4) differ greatly; So the measurement of dielectric constant can be distinguished oil, gas, water layer more simply than other means, in recent years, near the measurement of stratum dielectric constant well is more and more come into one's own.
The heterogeneity on stratum can affect the measurement of dielectric constant of rock and electrical conductivity; In the time that logger operating frequency is lower, this factor is larger on the measurement impact of dielectric constant; And this impact is less when upper frequency (reaching GHz).Owing to being applied in early days, the operating frequency of Measuring Dielectric Constant instrument is lower, and the heterogeneity on stratum is mixed larger to the Accuracy of its measurement; Early stage instrument has only utilized the difference that transmits and receives on a small quantity the electromagnetic relative amplitude in path, phase place simultaneously, thus there is the shortcoming that the well logging informations such as investigation depth is shallow, resolution ratio is low do not enrich, and cannot carry out the two-dimensional detection of formation anisotropy.
(3), utility model content:
The technical problems to be solved in the utility model is: overcome the defect of prior art, a kind of high frequency battle array is provided
The underground survey circuit of row dielectric tool, this underground survey circuit is surveyed deeply, resolution ratio is high, the abundant information providing, and can carry out formation anisotropy detection.
The technical solution of the utility model:
A underground survey circuit for HF array dielectric tool, contain source of synchronising signal, power amplifier,
The one or four port coupler, the two or four port coupler, the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch, the 5th RF switch, the first dual polarization transmitting antenna, the second dual polarization transmitting antenna, the first reception of double polarization antenna, the second reception of double polarization antenna, the 3rd reception of double polarization antenna, the first low-noise amplifier, the second low-noise amplifier, the 3rd low-noise amplifier, the 4th low-noise amplifier, the 5th low-noise amplifier, the 6th low-noise amplifier, the 7th low-noise amplifier, the first frequency mixer, the second frequency mixer, three-mixer, the 4th frequency mixer, the 5th frequency mixer, the 6th frequency mixer, the 7th frequency mixer, the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier, the 7th digital control gain amplifier, multi-channel synchronous sampled analog/digital quantizer and signal processor,
Transmitting of source of synchronising signal output is amplified into the signal input part of the one or four port coupler and the two or four port coupler through power amplifier, the signal of the signal output part of the one or four port coupler enters in the first dual polarization transmitting antenna after the first RF switch, and the signal of the signal output part of the two or four port coupler enters in the second dual polarization transmitting antenna after the second RF switch; The signal of two coupled end of the one or four port coupler is respectively after the first low-noise amplifier and the amplification of the second low-noise amplifier, enter respectively the high-frequency signal input of the first frequency mixer and the second frequency mixer, the output of the first frequency mixer and the second frequency mixer is connected with the input of the first digital control gain amplifier and the second digital control gain amplifier respectively again; The signal of two coupled end of the two or four port coupler is respectively after the 3rd low-noise amplifier and the amplification of the 4th low-noise amplifier, enter respectively the high-frequency signal input of three-mixer and the 4th frequency mixer, the output of three-mixer and the 4th frequency mixer is connected with the input of the 3rd digital control gain amplifier and the 4th digital control gain amplifier respectively again;
The first reception of double polarization antenna, the signal that the second reception of double polarization antenna and the 3rd reception of double polarization antenna reception arrive is respectively through the 3rd RF switch, after the 4th RF switch and the 5th RF switch, enter respectively again the 5th low-noise amplifier, the input of the 6th low-noise amplifier and the 7th low-noise amplifier, the 5th low-noise amplifier, the output of the 6th low-noise amplifier and the 7th low-noise amplifier respectively with the 5th frequency mixer, the 6th frequency mixer is connected with the high-frequency signal input of the 7th frequency mixer, the 5th frequency mixer, the output of the 6th frequency mixer and the 7th frequency mixer respectively with the 5th digital control gain amplifier, the 6th digital control gain amplifier is connected with the input of the 7th digital control gain amplifier,
The output of the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier and the 7th digital control gain amplifier is connected with seven main input end of analog signal of multi-channel synchronous sampled analog/digital quantizer respectively, and the output of multi-channel synchronous sampled analog/digital quantizer is connected with the signal input part of signal processor;
The reference signal of source of synchronising signal output enters the first frequency mixer, the second frequency mixer, three-mixer, the 4th frequency mixer, the 5th frequency mixer, the reference signal input of the 6th frequency mixer and the 7th frequency mixer, the synchronous acquisition signal of source of synchronising signal output enters the enabling signal input of multi-channel synchronous sampled analog/digital quantizer, the gain control output end of signal processor and the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier is connected with the gain control input of the 7th digital control gain amplifier, the antenna switching controls output of signal processor and the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch is connected with the switching controls input of the 5th RF switch.
The underground survey circuit of this HF array dielectric tool also contains subsidiary probe, and the output of subsidiary probe is connected with the secondary analog signal input part of multi-channel synchronous sampled analog/digital quantizer.
Subsidiary probe contains temperature pick up and pressure sensor, and the model of temperature pick up is: ADT7310, the model of pressure sensor is: PPM226-LS2.
The model of source of synchronising signal is: AD9914; The model of power amplifier is: WPM0913C; The model of the one or four port coupler, the two or four port coupler is: DC0900A30; The model of the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch and the 5th RF switch is: ZASW-2-50DR+; The model of the first low-noise amplifier, the second low-noise amplifier, the 3rd low-noise amplifier, the 4th low-noise amplifier, the 5th low-noise amplifier, the 6th low-noise amplifier and the 7th low-noise amplifier is: WHM0510AE; The model of the first frequency mixer, the second frequency mixer, three-mixer, the 4th frequency mixer, the 5th frequency mixer, the 6th frequency mixer, the 7th frequency mixer is: JCIR-152H+; The model of the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier and the 7th digital control gain amplifier is: LTC6910; The model of multi-channel synchronous sampled analog/digital quantizer is: ADS1278; Signal processor is DSP signal processor, and the model of DSP signal processor is: TMS320F28335.
The first dual polarization transmitting antenna, the second dual polarization transmitting antenna, the first reception of double polarization antenna, the second reception of double polarization antenna and the 3rd reception of double polarization antenna are the dual polarized antenna that structure is identical, this dual polarized antenna contains housing and probe groups, the opening surface that housing contains inner chamber and is communicated with inner chamber, probe groups is arranged in the inner chamber of housing and has certain distance with opening surface place, and probe groups contains and intersects the first probe and the second probe that arrange and be separated from each other; The signal of the antenna switching controls output of signal processor is controlled the work of the first probe and the second probe in dual polarized antenna by the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch and the 5th RF switch.
Dual polarized antenna also contains the first coaxial line, the second coaxial line, the first connector and the second connector, contains the second installation passage that first of the first coaxial line is installed passage and the second coaxial line is installed is installed on housing;
The first first end and the second first end that passage is installed that passage is installed is all communicated with inner chamber, the first the second end and second the second end that passage is installed that passage is installed all passes housing, the first connector is arranged on the second end of the first installation passage, and the second connector is arranged on the second end of the second installation passage;
The first end of the first coaxial line is connected with the first end of the first probe, the first end of the second coaxial line and second
The first end of probe connects, and the second end of the first coaxial line is fixed by the first connector, and the second end of the second coaxial line is fixed by the second connector, and the second end of the first probe and the second end of the second probe are all fixedly mounted on the inwall of housing;
The first connector and the second connector are RF coaxial joint.
Dual polarized antenna also contains medium and sealing ring, and Filled Dielectrics is in the inner chamber of housing, and medium is glass material or ceramic materials, and sealing ring is set in outside housing.
Dual polarized antenna also contains the first impedance matching unit and the second impedance matching unit, and the first impedance matching unit is connected with the first connector, and the second impedance matching unit is connected with the second connector; The inner wire of the first coaxial line is electrically connected with the first end of the first probe, and the inner wire of the second coaxial line is electrically connected with the first end of the second probe; The first end of the first end of the first probe and the second probe all shrinks gradually ground and stretches out.
The first probe is mutually vertical with the second probe.
The first groove is contained at the middle part of the first probe, and the second groove is contained at the middle part of the second probe, the bottom land of the bottom land of the first groove and the second groove be oppositely arranged and the bottom land of the first groove and the bottom land of the second groove between there is gap.
Arbitrary polarisation direction and the first probe and the second parallel plane electromagnetic field in probe place can be launched separately or receive to this dual polarized antenna, by receiving the dielectric constant of measuring anisotropic formation with transmitting.Particularly, can play at the first probe and the second probe place plane underexcitation the electromagnetic field of any polarizing angle by adjusting respectively the amplitude of excitation signals and phase place, measure like this phase change and the amplitude fading of different polarised directions under Different Strata environment by dual-mode antenna battle array, and then can obtain through Inversion Calculation the formation information of corresponding polarised direction.
Source of synchronising signal is exported three tunnel synchronizing signals:
high frequency 1GHz signal, as transmitting.
reference
Signal, carries out mixing with transmit (1GHz), carries out the processing such as analog digital changing to low frequency under high frequency 1GHz signal.
synchronous acquisition signal, as the enabling signal of multi-channel synchronous sampled analog/digital quantizer.
Power amplifier is realized the high-power transmitting of high-frequency signal (1GHz).
The major function of four port coupler is:
coupling firing signal (1GHz), monitors transmitting, and measures the absolute phase, the amplitude that transmit simultaneously.
the be coupled reflected signal of the first dual polarization transmitting antenna and the second dual polarization transmitting antenna, measures phase place, the amplitude of reflected signal, carries out the shop calibration of instrument.
RF switch is used for switching working mode, carries out formation anisotropy detection.
Dual polarization transmitting antenna and reception of double polarization antenna transmit and receive respectively the electromagnetic field of mutually orthogonal polarization, measure two-dimentional formation information.
Low-noise amplifier amplifies receiving small and weak high-frequency signal, improves the sensitivity of measuring.
Frequency mixer changes to low frequency under the high-frequency signal receiving.
Digital control gain amplifier is the situation to high-frequency electromagnetic wave attenuation according to actual formation, adjusts the gain of receive path.
Multi-channel synchronous sampled analog/digital quantizer synchronously completes the digitlization of multi-channel analog signal.
The duty of the each device of signal processor control:
control RF switch, the level of switch dual poliarizing antenna, vertical polarization directions, carry out the detection of formation anisotropy;
: control the digital control gain amplifier of multiple receive paths, adjust the gain of receive path, expanded the dynamic range that receives small and weak signal;
: control multi-channel synchronous sampled analog/digital quantizer, carry out multichannel and receive signal synchronized sampling;
: data signal is carried out to coherent signal processing, solve absolute phase and the amplitude of each receive path signal.
Subsidiary probe measurement supplementary (temperature, pressure), the curve of real time correction survey data.
The course of work of this underground survey circuit is: source of synchronising signal produces 1GHz signal and delivers to power amplifier, be transferred to respectively on the first dual polarization transmitting antenna, the second dual polarization transmitting antenna through the one or four port coupler and the two or four port coupler again, and switched respectively the polarised direction of the first dual polarization transmitting antenna, the second dual polarization transmitting antenna by the first RF switch and the second RF switch, carry out the detection on two-dimentional stratum.The one or four port coupler and the two or four port coupler coupling firing signal, monitor and transmit with this, the signal being coupled to is through low-noise amplifier, frequency mixer, digital control gain amplifier, undertaken after digitlization by multi-channel synchronous sampled analog/digital quantizer again, deliver to and in signal processor, solve the absolute phase, the amplitude that transmit; Simultaneously, the be coupled reflected signal of the first dual polarization transmitting antenna, the second dual polarization transmitting antenna of the one or four port coupler and the two or four port coupler, the signal being coupled to is through low-noise amplifier, frequency mixer, digital control gain amplifier, undertaken after digitlization by multi-channel synchronous sampled analog/digital quantizer again, deliver to absolute phase, amplitude that signal processor solves reflected signal, for the shop calibration of HF array logging system.High frequency 1GHz electromagnetic wave arrives the first reception of double polarization antenna, the second reception of double polarization antenna, the 3rd reception of double polarization antenna after earth-attenuation, the first reception of double polarization antenna, the second reception of double polarization antenna, the 3rd reception of double polarization antenna reception are from the faint high-frequency signal of earth-attenuation, this high-frequency signal is through low-noise amplifier, frequency mixer, digital control gain amplifier, undertaken after digitlization by multi-channel synchronous sampled analog/digital quantizer again, deliver to signal processor and solve each receive path and receive absolute phase, the amplitude of signal.Absolute phase, range value by multiple send-receive channel signals obtain the dielectric constant curve on stratum and the anisotropy on stratum through processing.And in conjunction with subsidiary probe real time correction log.
The beneficial effects of the utility model:
1, the utility model utilizes multichannel transmitting and receiving circuit to measure bed response, measures multiple simultaneously
The absolute phase of channel signal, range value, can obtain the array dielectric curve of different investigation depths, different resolution, make this array dielectric curve survey dark, resolution ratio is high, abundant information.The utility model has reduced the impact on dielectric constant measurement of mode that stratum heterogeneity mixes, has improved the degree of depth that instrument is surveyed, and has enriched the information of stratum detecting.
2, the utility model switches the mode of operation of RF switch by signal processor control, can carry out
Formation anisotropy is surveyed, and stratum two-dimensional signal is provided.
3, the utility model employing high frequency 1GHz is operating frequency, has reduced the heterogeneity on stratum and has mixed the impact on certainty of measurement.
4, the utility model can carry out shop calibration, has improved certainty of measurement.
5, the utility model provides subsidiary information, and real time calibration log has improved the accuracy of log.
(4), accompanying drawing explanation:
Fig. 1 is the circuit theory schematic diagram of the underground survey circuit of HF array dielectric tool;
Fig. 2 is the structural representation of dual polarized antenna;
Fig. 3 is the part plan structure schematic diagram of Fig. 2;
Fig. 4 is the schematic diagram of the first probe while being energized;
Fig. 5 is the schematic diagram of the second probe while being energized;
Fig. 6 is the first probe and the second probe schematic diagram while being simultaneously energized;
Fig. 7 is the mounting structure schematic diagram of the first dual polarization transmitting antenna, the second dual polarization transmitting antenna, the first reception of double polarization antenna, the second reception of double polarization antenna and the 3rd reception of double polarization antenna.
(5), the specific embodiment:
Referring to Fig. 1～Fig. 7, in figure, the underground survey circuit of HF array dielectric tool contains synchronizing signal
Source U1, power amplifier U2, the one or four port coupler O1, the two or four port coupler O2, the first RF switch K1, the second RF switch K2, the 3rd radio frequency K switch 3, the 4th RF switch K4, the 5th RF switch K5, the first dual polarization transmitting antenna T1, the second dual polarization transmitting antenna T2, the first reception of double polarization antenna R1, the second reception of double polarization antenna R2, the 3rd reception of double polarization antenna R3, the first low-noise amplifier F1, the second low-noise amplifier F2, the 3rd low-noise amplifier F3, the 4th low-noise amplifier F4, the 5th low-noise amplifier F5, the 6th low-noise amplifier F6, the 7th low-noise amplifier F7, the first frequency mixer H1, the second frequency mixer H2, three-mixer H3, the 4th frequency mixer H4, the 5th frequency mixer H5, the 6th frequency mixer H6, the 7th frequency mixer H7, the first digital control gain amplifier DGC1, the second digital control gain amplifier DGC2, the 3rd digital control gain amplifier DGC3, the 4th digital control gain amplifier DGC4, the 5th digital control gain amplifier DGC5, the 6th digital control gain amplifier DGC6, the 7th digital control gain amplifier DGC7, multi-channel synchronous sampled analog/digital quantizer U4 and signal processor U3,
Transmitting of source of synchronising signal U1 output is amplified into the signal input part of the one or four port coupler O1 and the two or four port coupler O2 through power amplifier U2, the signal of the signal output part of the one or four port coupler O1 enters in the first dual polarization transmitting antenna T1 after the first RF switch K1, and the signal of the signal output part of the two or four port coupler O2 enters in the second dual polarization transmitting antenna T2 after the second RF switch K2; The signal of two coupled end of the one or four port coupler O1 is respectively after the first low-noise amplifier F1 and the second low-noise amplifier F2 amplification, enter respectively the high-frequency signal input of the first frequency mixer H1 and the second frequency mixer H2, the output of the first frequency mixer H1 and the second frequency mixer H2 is connected with the input of the first digital control gain amplifier DGC1 and the second digital control gain amplifier DGC2 respectively again; The signal of two coupled end of the two or four port coupler O2 is respectively after the 3rd low-noise amplifier F3 and the 4th low-noise amplifier F4 amplification, enter respectively the high-frequency signal input of three-mixer H3 and the 4th frequency mixer H4, the output of three-mixer H3 and the 4th frequency mixer H4 is connected with the input of the 3rd digital control gain amplifier DGC3 and the 4th digital control gain amplifier DGC4 respectively again;
The first reception of double polarization antenna R1, the signal that the second reception of double polarization antenna R2 and the 3rd reception of double polarization antenna R3 receive is respectively through the 3rd radio frequency K switch 3, after the 4th RF switch K4 and the 5th RF switch K5, enter respectively again the 5th low-noise amplifier F5, the input of the 6th low-noise amplifier F6 and the 7th low-noise amplifier F7, the 5th low-noise amplifier F5, the output of the 6th low-noise amplifier F6 and the 7th low-noise amplifier F7 respectively with the 5th frequency mixer H5, the 6th frequency mixer H6 is connected with the high-frequency signal input of the 7th frequency mixer H7, the 5th frequency mixer H5, the output of the 6th frequency mixer H6 and the 7th frequency mixer H7 respectively with the 5th digital control gain amplifier DGC5, the 6th digital control gain amplifier DGC6 is connected with the input of the 7th digital control gain amplifier DGC7,
The output of the first digital control gain amplifier DGC1, the second digital control gain amplifier DGC2, the 3rd digital control gain amplifier DGC3, the 4th digital control gain amplifier DGC4, the 5th digital control gain amplifier DGC5, the 6th digital control gain amplifier DGC6 and the 7th digital control gain amplifier DGC7 is connected with seven main input end of analog signal of multi-channel synchronous sampled analog/digital quantizer U4 respectively, and the output of multi-channel synchronous sampled analog/digital quantizer U4 is connected with the signal input part of signal processor U3;
The reference signal of source of synchronising signal U1 output enters the first frequency mixer H1, the second frequency mixer H2, three-mixer H3, the 4th frequency mixer H4, the 5th frequency mixer H5, the reference signal input of the 6th frequency mixer H6 and the 7th frequency mixer H7, the synchronous acquisition signal of source of synchronising signal U1 output enters the enabling signal input of multi-channel synchronous sampled analog/digital quantizer U4, the gain control output end of signal processor U1 and the first digital control gain amplifier DGC1, the second digital control gain amplifier DGC2, the 3rd digital control gain amplifier DGC3, the 4th digital control gain amplifier DGC4, the 5th digital control gain amplifier DGC5, the 6th digital control gain amplifier DGC6 is connected with the gain control input of the 7th digital control gain amplifier DGC7, the antenna switching controls output of signal processor U3 and the first RF switch K1, the second RF switch K1, the 3rd radio frequency K switch 3, the 4th RF switch K4 is connected with the switching controls input of the 5th RF switch K5.
The underground survey circuit of this HF array dielectric tool also contains subsidiary probe, and the output of subsidiary probe is connected with the secondary analog signal input part of multi-channel synchronous sampled analog/digital quantizer U4.
Subsidiary probe contains temperature pick up and pressure sensor, and the model of temperature pick up is: ADT7310, the model of pressure sensor is: PPM226-LS2.
The model of source of synchronising signal U1 is: AD9914; The model of power amplifier U2 is: WPM0913C; The model of the one or four port coupler O1, the two or four port coupler O2 is: DC0900A30; The model of the first RF switch K1, the second RF switch K2, the 3rd radio frequency K switch 3, the 4th RF switch K4 and the 5th RF switch K5 is: ZASW-2-50DR+; The model of the first low-noise amplifier F1, the second low-noise amplifier F2, the 3rd low-noise amplifier F3, the 4th low-noise amplifier F4, the 5th low-noise amplifier F5, the 6th low-noise amplifier F6 and the 7th low-noise amplifier F7 is: WHM0510AE; The model of the first frequency mixer H1, the second frequency mixer H2, three-mixer H3, the 4th frequency mixer H4, the 5th frequency mixer H5, the 6th frequency mixer H6, the 7th frequency mixer H7 is: JCIR-152H+; The model of the first digital control gain amplifier DGC1, the second digital control gain amplifier DGC2, the 3rd digital control gain amplifier DGC3, the 4th digital control gain amplifier DGC4, the 5th digital control gain amplifier DGC5, the 6th digital control gain amplifier DGC6 and the 7th digital control gain amplifier DGC7 is: LTC6910; The model of multi-channel synchronous sampled analog/digital quantizer U4 is: ADS1278; Signal processor U3 is DSP signal processor, and the model of DSP signal processor is: TMS320F28335.
The first dual polarization transmitting antenna T1, the second dual polarization transmitting antenna T2, the first reception of double polarization antenna R1, the second reception of double polarization antenna R2 and the 3rd reception of double polarization antenna R3 are the dual polarized antenna that structure is identical, this dual polarized antenna contains housing 10 and probe groups 20, the opening surface that housing 10 contains inner chamber and is communicated with inner chamber, probe groups 20 is arranged in the inner chamber of housing 10 and has certain distance with opening surface place, and probe groups 20 contains and intersects the first probe 21 and the second probe 22 that arrange and be separated from each other; The signal of the antenna switching controls output of signal processor U3 is controlled the work of the first probe 21 and the second probe 22 in dual polarized antenna by the first RF switch K1, the second RF switch K2, the 3rd radio frequency K switch 3, the 4th RF switch K4 and the 5th RF switch K5.
Dual polarized antenna also contains the first coaxial line 30, the second coaxial line, the first connector 40 and the second connector, contains the second installation passage that first of the first coaxial line 30 is installed passage and the second coaxial line is installed is installed on housing 10;
The first first end and the second first end that passage is installed that passage is installed is all communicated with inner chamber, the first the second end and second the second end that passage is installed that passage is installed all passes housing 10, the first connector 40 is arranged on the second end of the first installation passage, and the second connector is arranged on the second end of the second installation passage;
The first end of the first coaxial line 30 is connected with the first end of the first probe 21, the first end of the second coaxial line
Be connected with the first end of the second probe 22, the second end of the first coaxial line 30 is fixing by the first connector 40, the second end of the second coaxial line is fixed by the second connector, and the second end of the second end of the first probe 21 and the second probe 22 is all fixedly mounted on the inwall of housing 10;
The first connector 40 and the second connector are RF coaxial joint.
Dual polarized antenna also contains medium and sealing ring, and Filled Dielectrics is in the inner chamber of housing 10 and sintering, and medium is glass material or ceramic materials, and certainly, medium can be also other the higher material of dielectric constant.Sealing ring is set in outside housing 10.
Because filled media part-structure is comparatively complicated, Filled Dielectrics step can be: first use resistant to elevated temperatures coaxial line and resistant to elevated temperatures welding manner to overlap out total, and secondly to filled media in the space in housing 10, and integral sintered together with antenna assembly.The whole space that can fill so full housing 10, comprises very tiny space.Medium is sintered into an entirety with housing 10, can avoid the interface between the two to introduce air layer, and then can avoid electromagnetic wave in multilayer dielectricity, to produce complicated reflection, refraction etc. simultaneously.Opening surface place at housing 10 also seals, and avoids the drilling fluid such as water or mud to enter antenna inside under the high temperature and high pressure environment of down-hole.
Sealing ring plays the effect of sealing in antenna, makes antenna can bear the high temperature and high pressure environment of down-hole.Housing 10 adopts the metal material that conductance is higher to make, as brass, alloy etc.Have the structure for sealing ring is installed in the outside of housing 10, an antenna is arranged on by structures such as sealing rings on the backup pole plate 60 of instrument, can realize independent disassembling and the installation of each antenna assembly.The structure of backup pole plate 60 also can be worked under the high temperature and high pressure environment of down-hole.
Dual polarized antenna also contains the first impedance matching unit 50 and the second impedance matching unit, and the first impedance matching unit 50 is connected with the first connector 40, and the second impedance matching unit is connected with the second connector; The inner wire 31 of the first coaxial line 30 is electrically connected with the first end of the first probe 21, and the inner wire of the second coaxial line is electrically connected with the first end of the second probe 22; Increase impedance matching unit at the input of transmitting antenna or at the output of reception antenna, after the impedance transformation of impedance matching unit, mated with the late-class circuit of certain characteristic impedance.After processing like this, antenna can be worked in 20MHz-1.1GHz frequency range.Because the dielectric constant of medium of filling is higher, in high band, can not use impedance matching unit since like this, directly make the Circuit Matching of antenna feed impedance and rear class characteristic impedance 50 Ω.Coupling in low-frequency range is also because the dielectric constant of filled media comparatively easily realizes impedance matching compared with high.In 20MHz-1.1GHz frequency range, the conventional lamped element of impedance matching unit is made, and in above-mentioned band limits, higher-frequency point also can adopt the elements with distributed parameters such as microstrip line to make.
The first end of the first end of the first probe 21 and the second probe 22 all shrinks gradually ground and stretches out.Abrupt change for fear of the inner wire by thinner to step the first thicker probe 21 or the second probe 22, to the sudden change producing along line current, adopts conical gradual change mode to connect in the two coupling part.Certainly, the transient mode of connection is not limited to conical gradual change, as long as can make electromagnetic wave not produce the reliable gradual change connected mode of all can be used as of strong reflection in coupling part, as arc, parabolic type etc.
The first probe 21 is mutually vertical with the second probe 22, can be for the mutually orthogonal electromagnetic field of exciting electrode direction.
The first groove is contained at the middle part of the first probe 21, the second groove is contained at the middle part of the second probe 22, the bottom land of the bottom land of the first groove and the second groove be oppositely arranged and the bottom land of the first groove and the bottom land of the second groove between there is gap, can make like this first probe 21 and the second probe 22 be placed in same plane, and the first probe 21 intersect but does not contact with the second probe 22.In order to make not produce sudden change along line current, can adopt circular arc or other gradual mode of grooving such as parabola shaped.Preferably, the first probe 21 and the second probe 22 are semicircle cylindricality.Certainly, the first probe and the second probe also can be rectangle laminated structure.
Arbitrary polarisation direction and the first probe 21 and the second probe 22 parallel plane electromagnetic fields in place can be launched separately or receive to this dual polarized antenna, by receiving the dielectric constant of measuring anisotropic formation with transmitting.Particularly, can play at the first probe 21 and the second probe 22 place plane underexcitations the electromagnetic field of any polarizing angle by adjusting respectively the amplitude of excitation signals and phase place, measure like this phase change and the amplitude fading of different polarised directions under Different Strata environment by dual-mode antenna battle array, and then can obtain through Inversion Calculation the formation information of corresponding polarised direction.
Probe groups 20 provides respectively the electromagnetic field of pairwise orthogonal polarised direction, as shown in Fig. 4～Fig. 6, is wherein with hypographous probe for being energized probe, and arrow represents direction of an electric field.As shown in Figure 6, in the time that two probes are energized, adjust respectively amplitude and the phase place of excitation signals simultaneously, just can encourage the electromagnetic field of any polarizing angle in probe groups 20 planes.
Transmitting antenna and reception antenna mate to reach polarization by the amplitude and the phase place that regulate pumping signal, receive and the identical object in polarization of ele angle of launching.Measure accordingly amplitude and phase place that receiving antenna device receives signal, obtain the anisotropic parameters of corresponding stratum under this kind of polarization.
Source of synchronising signal U1 exports three tunnel synchronizing signals:
high frequency 1GHz signal, as transmitting.
Reference signal, carries out mixing with transmit (1GHz), carries out the processing such as analog digital changing to low frequency under high frequency 1GHz signal.
synchronous acquisition signal, as the enabling signal of multi-channel synchronous sampled analog/digital quantizer U4.
Power amplifier U2 realizes the high-power transmitting of high-frequency signal (1GHz).
The major function of four port coupler O1, O2 is:
coupling firing signal (1GHz), monitors transmitting, and measures the absolute phase, the amplitude that transmit simultaneously.
the be coupled reflected signal of the first dual polarization transmitting antenna T1 and the second dual polarization transmitting antenna T1, measures phase place, the amplitude of reflected signal, carries out the shop calibration of instrument.
RF switch K1～K5 is used for switching working mode, carries out formation anisotropy detection.
Dual polarization transmitting antenna T1, T2 and reception of double polarization antenna R1, R2, R3 transmit and receive respectively the electromagnetic field of mutually orthogonal polarization, measure two-dimentional formation information.
Low-noise amplifier F1～F7 amplifies receiving small and weak high-frequency signal, improves the sensitivity of measuring.
Frequency mixer H1～H7 changes to low frequency under the high-frequency signal receiving.
Digital control gain amplifier DGC1～DGC7 is the situation to high-frequency electromagnetic wave attenuation according to actual formation, adjusts the gain of receive path.
Multi-channel synchronous sampled analog/digital quantizer U4 synchronously completes the digitlization of multi-channel analog signal.
Signal processor U3 controls the duty of each device:
control RF switch K1～K5, the level of switch dual poliarizing antenna, vertical polarization directions, carry out the detection of formation anisotropy;
: control the digital control gain amplifier DGC1～DGC7 of multiple receive paths, adjust the gain of receive path, expanded the dynamic range that receives small and weak signal;
: control multi-channel synchronous sampled analog/digital quantizer U4, carry out multichannel and receive signal synchronized sampling;
: data signal is carried out to coherent signal processing, solve absolute phase and the amplitude of each receive path signal.
Subsidiary probe measurement supplementary (temperature, pressure), the curve of real time correction survey data.
The course of work of this underground survey circuit is: source of synchronising signal U1 produces 1GHz signal and delivers to power amplifier U2, be transferred to respectively on the first dual polarization transmitting antenna T1, the second dual polarization transmitting antenna T2 through the one or four port coupler O1 and the two or four port coupler O2 again, and switched respectively the polarised direction of the first dual polarization transmitting antenna T1, the second dual polarization transmitting antenna T2 by the first RF switch K1 and the second RF switch K2, carry out the detection on two-dimentional stratum.The one or four port coupler O1 and the two or four port coupler O2 coupling firing signal, monitor and transmit with this, the signal being coupled to is through low-noise amplifier F1～F4, frequency mixer H1～H4, digital control gain amplifier DGC1～DGC4, undertaken after digitlization by multi-channel synchronous sampled analog/digital quantizer U4 again, deliver to and in signal processor U3, solve the absolute phase, the amplitude that transmit; Simultaneously, the be coupled reflected signal of the first dual polarization transmitting antenna T1, the second dual polarization transmitting antenna T2 of the one or four port coupler O1 and the two or four port coupler O2, the signal being coupled to is through low-noise amplifier F1～F4, frequency mixer H1～H4, digital control gain amplifier DGC1～DGC4, undertaken after digitlization by multi-channel synchronous sampled analog/digital quantizer U4 again, deliver to absolute phase, amplitude that signal processor U3 solves reflected signal, for the shop calibration of HF array logging system.High frequency 1GHz electromagnetic wave arrives the first reception of double polarization antenna R1 after earth-attenuation, the second reception of double polarization antenna R2, the 3rd reception of double polarization antenna R3, the first reception of double polarization antenna R1, the second reception of double polarization antenna R2, the 3rd reception of double polarization antenna R3 receives the faint high-frequency signal from earth-attenuation, this high-frequency signal is through low-noise amplifier F5～F7, frequency mixer H5～H7, digital control gain amplifier DGC5～DGC7, undertaken after digitlization by multi-channel synchronous sampled analog/digital quantizer U4 again, deliver to the absolute phase that signal processor U3 solves each receive path reception signal, amplitude.Absolute phase, range value by multiple send-receive channel signals obtain the dielectric constant curve on stratum and the anisotropy on stratum through processing.And in conjunction with subsidiary probe real time correction log.
Claims (10)
1. a underground survey circuit for HF array dielectric tool, is characterized in that: contain source of synchronising signal, power amplifier, the one or four port coupler, the two or four port coupler, the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch, the 5th RF switch, the first dual polarization transmitting antenna, the second dual polarization transmitting antenna, the first reception of double polarization antenna, the second reception of double polarization antenna, the 3rd reception of double polarization antenna, the first low-noise amplifier, the second low-noise amplifier, the 3rd low-noise amplifier, the 4th low-noise amplifier, the 5th low-noise amplifier, the 6th low-noise amplifier, the 7th low-noise amplifier, the first frequency mixer, the second frequency mixer, three-mixer, the 4th frequency mixer, the 5th frequency mixer, the 6th frequency mixer, the 7th frequency mixer, the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier, the 7th digital control gain amplifier, multi-channel synchronous sampled analog/digital quantizer and signal processor,
Transmitting of source of synchronising signal output is amplified into the signal input part of the one or four port coupler and the two or four port coupler through power amplifier, the signal of the signal output part of the one or four port coupler enters in the first dual polarization transmitting antenna after the first RF switch, and the signal of the signal output part of the two or four port coupler enters in the second dual polarization transmitting antenna after the second RF switch; The signal of two coupled end of the one or four port coupler is respectively after the first low-noise amplifier and the amplification of the second low-noise amplifier, enter respectively the high-frequency signal input of the first frequency mixer and the second frequency mixer, the output of the first frequency mixer and the second frequency mixer is connected with the input of the first digital control gain amplifier and the second digital control gain amplifier respectively again; The signal of two coupled end of the two or four port coupler is respectively after the 3rd low-noise amplifier and the amplification of the 4th low-noise amplifier, enter respectively the high-frequency signal input of three-mixer and the 4th frequency mixer, the output of three-mixer and the 4th frequency mixer is connected with the input of the 3rd digital control gain amplifier and the 4th digital control gain amplifier respectively again;
The first reception of double polarization antenna, the signal that the second reception of double polarization antenna and the 3rd reception of double polarization antenna reception arrive is respectively through the 3rd RF switch, after the 4th RF switch and the 5th RF switch, enter respectively again the 5th low-noise amplifier, the input of the 6th low-noise amplifier and the 7th low-noise amplifier, the 5th low-noise amplifier, the output of the 6th low-noise amplifier and the 7th low-noise amplifier respectively with the 5th frequency mixer, the 6th frequency mixer is connected with the high-frequency signal input of the 7th frequency mixer, the 5th frequency mixer, the output of the 6th frequency mixer and the 7th frequency mixer respectively with the 5th digital control gain amplifier, the 6th digital control gain amplifier is connected with the input of the 7th digital control gain amplifier,
The output of the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier and the 7th digital control gain amplifier is connected with seven main input end of analog signal of multi-channel synchronous sampled analog/digital quantizer respectively, and the output of multi-channel synchronous sampled analog/digital quantizer is connected with the signal input part of signal processor;
The reference signal of source of synchronising signal output enters the first frequency mixer, the second frequency mixer, three-mixer, the 4th frequency mixer, the 5th frequency mixer, the reference signal input of the 6th frequency mixer and the 7th frequency mixer, the synchronous acquisition signal of source of synchronising signal output enters the enabling signal input of multi-channel synchronous sampled analog/digital quantizer, the gain control output end of signal processor and the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier is connected with the gain control input of the 7th digital control gain amplifier, the antenna switching controls output of signal processor and the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch is connected with the switching controls input of the 5th RF switch.
2. the underground survey circuit of HF array dielectric tool according to claim 1, it is characterized in that: also contain subsidiary probe, the output of subsidiary probe is connected with the secondary analog signal input part of multi-channel synchronous sampled analog/digital quantizer.
3. the underground survey circuit of HF array dielectric tool according to claim 2, is characterized in that: described subsidiary probe contains temperature pick up and pressure sensor.
4. the underground survey circuit of HF array dielectric tool according to claim 1, is characterized in that: the model of described source of synchronising signal is: AD9914; The model of power amplifier is: WPM0913C; The model of the one or four port coupler, the two or four port coupler is: DC0900A30; The model of the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch and the 5th RF switch is: ZASW-2-50DR+; The model of the first low-noise amplifier, the second low-noise amplifier, the 3rd low-noise amplifier, the 4th low-noise amplifier, the 5th low-noise amplifier, the 6th low-noise amplifier and the 7th low-noise amplifier is: WHM0510AE; The model of the first frequency mixer, the second frequency mixer, three-mixer, the 4th frequency mixer, the 5th frequency mixer, the 6th frequency mixer, the 7th frequency mixer is: JCIR-152H+; The model of the first digital control gain amplifier, the second digital control gain amplifier, the 3rd digital control gain amplifier, the 4th digital control gain amplifier, the 5th digital control gain amplifier, the 6th digital control gain amplifier and the 7th digital control gain amplifier is: LTC6910; The model of multi-channel synchronous sampled analog/digital quantizer is: ADS1278; Signal processor is DSP signal processor, and the model of DSP signal processor is: TMS320F28335.
5. the underground survey circuit of HF array dielectric tool according to claim 1, it is characterized in that: described the first dual polarization transmitting antenna, the second dual polarization transmitting antenna, the first reception of double polarization antenna, the second reception of double polarization antenna is with the 3rd reception of double polarization antenna dual polarized antenna that structure is identical, this dual polarized antenna contains housing and probe groups, the opening surface that housing contains inner chamber and is communicated with inner chamber, probe groups is arranged in the inner chamber of housing and has certain distance with opening surface place, probe groups contains and intersects the first probe and the second probe that arrange and be separated from each other, the signal of the antenna switching controls output of signal processor is controlled the work of the first probe and the second probe in dual polarized antenna by the first RF switch, the second RF switch, the 3rd RF switch, the 4th RF switch and the 5th RF switch.
6. the underground survey circuit of HF array dielectric tool according to claim 5, it is characterized in that: described dual polarized antenna also contains the first coaxial line, the second coaxial line, the first connector and the second connector, on housing, contain the second installation passage that first of the first coaxial line is installed passage and the second coaxial line is installed is installed;
The first first end and the second first end that passage is installed that passage is installed is all communicated with inner chamber, the first the second end and second the second end that passage is installed that passage is installed all passes housing, the first connector is arranged on the second end of the first installation passage, and the second connector is arranged on the second end of the second installation passage;
The first end of the first coaxial line is connected with the first end of the first probe, the first end of the second coaxial line and second
The first end of probe connects, and the second end of the first coaxial line is fixed by the first connector, and the second end of the second coaxial line is fixed by the second connector, and the second end of the first probe and the second end of the second probe are all fixedly mounted on the inwall of housing;
The first connector and the second connector are RF coaxial joint.
7. the underground survey circuit of HF array dielectric tool according to claim 5, is characterized in that: described dual polarized antenna also contains medium and sealing ring, Filled Dielectrics in the inner chamber of housing, medium
For glass material or ceramic materials, sealing ring is set in outside housing.
8. the underground survey circuit of HF array dielectric tool according to claim 6, it is characterized in that: described dual polarized antenna also contains the first impedance matching unit and the second impedance matching unit, the first impedance matching unit is connected with the first connector, and the second impedance matching unit is connected with the second connector; The inner wire of the first coaxial line is electrically connected with the first end of the first probe, and the inner wire of the second coaxial line is electrically connected with the first end of the second probe; The first end of the first end of the first probe and the second probe all shrinks gradually ground and stretches out.
9. the underground survey circuit of HF array dielectric tool according to claim 5, is characterized in that: described the first probe is mutually vertical with the second probe.
10. the underground survey circuit of HF array dielectric tool according to claim 5, it is characterized in that: the first groove is contained at the middle part of described the first probe, the second groove is contained at the middle part of the second probe, the bottom land of the bottom land of the first groove and the second groove be oppositely arranged and the bottom land of the first groove and the bottom land of the second groove between there is gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320819926.4U CN203603895U (en) | 2013-12-14 | 2013-12-14 | Downhole measuring circuit of high-frequency array dielectric logging tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320819926.4U CN203603895U (en) | 2013-12-14 | 2013-12-14 | Downhole measuring circuit of high-frequency array dielectric logging tool |
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| CN203603895U true CN203603895U (en) | 2014-05-21 |
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| CN201320819926.4U Withdrawn - After Issue CN203603895U (en) | 2013-12-14 | 2013-12-14 | Downhole measuring circuit of high-frequency array dielectric logging tool |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726838A (en) * | 2013-12-14 | 2014-04-16 | 中国电子科技集团公司第二十二研究所 | Underground measurement circuit of high-frequency array dielectric logging instrument |
| CN104062686A (en) * | 2014-06-13 | 2014-09-24 | 中国科学院电工研究所 | Signal generating and driving system for multi-frequency array electrical logging |
| CN104060986A (en) * | 2014-06-13 | 2014-09-24 | 中国科学院电工研究所 | Multi-frequency array electrical logging resonant launching system |
| CN108918976A (en) * | 2018-04-18 | 2018-11-30 | 杭州电子科技大学 | A kind of multichannel high-temperature dielectric temperature spectrum test device |
-
2013
- 2013-12-14 CN CN201320819926.4U patent/CN203603895U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726838A (en) * | 2013-12-14 | 2014-04-16 | 中国电子科技集团公司第二十二研究所 | Underground measurement circuit of high-frequency array dielectric logging instrument |
| CN103726838B (en) * | 2013-12-14 | 2016-03-02 | 中国电子科技集团公司第二十二研究所 | The underground survey circuit of HF array dielectric tool |
| CN104062686A (en) * | 2014-06-13 | 2014-09-24 | 中国科学院电工研究所 | Signal generating and driving system for multi-frequency array electrical logging |
| CN104060986A (en) * | 2014-06-13 | 2014-09-24 | 中国科学院电工研究所 | Multi-frequency array electrical logging resonant launching system |
| CN104060986B (en) * | 2014-06-13 | 2017-01-18 | 中国科学院电工研究所 | Multi-frequency array electrical logging resonant launching system |
| CN108918976A (en) * | 2018-04-18 | 2018-11-30 | 杭州电子科技大学 | A kind of multichannel high-temperature dielectric temperature spectrum test device |
| CN108918976B (en) * | 2018-04-18 | 2020-11-27 | 杭州电子科技大学 | Multichannel high-temperature dielectric temperature spectrum testing device |
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