CN104074515A - Microresistivity scanning imaging logging device and radiating circuit thereof - Google Patents
Microresistivity scanning imaging logging device and radiating circuit thereof Download PDFInfo
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Abstract
The invention discloses a microresistivity scanning imaging logging device and a radiating circuit thereof. The radiating circuit comprises a filter module, a power amplifier module, a boosting module, a current measuring module and a voltage measuring module, wherein the filer module is used for receiving alternating current electrical signals and smoothing the alternating current electrical signals; the power amplifier module is used for amplifying filtered alternating current electrical signals; the boosting module is used for boosting amplified alternating current electrical signals to generate and output radiating signals; the current measuring module is used for measuring the electricity of the radiating signals and outputting measured current data; the voltage measuring module is used for measuring the voltage of the radiating signals and outputting measured voltage data. According to the invention, radiating signals which are large enough can be outputted to enable the radiating signals to penetrate through a mud insulating layer or a mud cake between an electrode and a borehole wall to enter into a stratum; the microresistivity scanning imaging logging device is suitable for microresistivity scanning imaging in oil bases or synthetic base mud.
Description
Technical field
The present invention relates to petroleum exploration field, relate in particular to a kind of radiating circuit and microresistivity scanning imagery well logging apparatus of microresistivity scanning imagery well logging apparatus.
Background technology
Microresistivity scanning imagery well logging can reflect more accurately, intuitively and therefore, is applied to the important informations such as geological structure in well, degree of porosity and fractue spacing more and more widely in each important step of petroleum exploration and development.
At present, in order to gather high-quality micro-resistivity imaging data information, can only use water-base mud.Because the resistivity of electric conductivity water-base mud and mud cake is low, thus the electric response in very strong stratum can be obtained, thus can obtain log clearly.
Due to oil-base mud can high temperature resistance, salt resistance erosion, there is good hole stability performance, and synthetic base mud can reduce the impact on environment, reduce risks and improve drilling efficiency, so, developing and promoting the use of now oil-base mud and synthetic base mud.But, in oil-base mud and this class mud of synthetic base mud, carry out the well logging of microresistivity scanning imagery and there is certain technology barrier.When this is because carries out microresistivity scanning imagery in oil-base mud and synthetic base mud, between emission electrode and the borehole wall, can form mud insulating layer or mud cake, having separated pole plate can not imaging with contacting of stratum.So, need to develop a kind of device of carrying out micro-resistance scan imaging in oil-base mud and synthetic base mud of can being suitable for.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the embodiment of the present invention provides a kind of radiating circuit and microresistivity scanning imagery well logging apparatus of microresistivity scanning imagery well logging apparatus, larger emission current can be provided, and can monitor in real time electric current and the voltage swing transmitting, to be suitable for carrying out microresistivity scanning imagery in oil-base mud and synthetic base mud.
First aspect present invention provides a kind of radiating circuit of microresistivity scanning imagery well logging apparatus, can comprise: filter module, power amplifier module, boost module, current measurement module and voltage measurement module, described filter module, power amplifier module, boost module and current measurement module are connected in series successively, described voltage measurement module and described current measurement module are connected in parallel, described filter module is for carrying out filtering to ac signal, described power amplifier module is for amplifying filtered ac signal, described boost module boosts to generate for the ac signal to after amplifying and transmits, described current measurement module is for measuring and export the current data of measurement to the described size of current transmitting, described voltage measurement module is for measuring and export the voltage data of measurement to the described voltage swing transmitting.
In the possible implementation of the first of first aspect, described filter module comprises the first filter circuit and the second filter circuit, and described the first filter circuit is connected with described the second filter circuit.
In the possible implementation of the second of first aspect, described the first filter circuit comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1, the second capacitor C 2 and the first integrated transporting discharging U1, described the first resistance R 1 and the second resistance R 2 are connected in series to the in-phase input end of described the first integrated transporting discharging U1, one end of described the first capacitor C 1 is connected between described the first resistance R 1 and the second resistance R 2, the other end of described the first capacitor C 1 is connected to the inverting input of described the first integrated transporting discharging U1 by described the 3rd resistance R 3, the reverse input end of described the first integrated transporting discharging U1 is connected to the output of described the first integrated transporting discharging U1 by described the 3rd resistance R 3, the inverting input of described the first integrated transporting discharging U1 is by described the 4th resistance R 4 ground connection, the in-phase input end of described the first integrated transporting discharging U1 is by described the second capacitor C 2 ground connection.
In the third possible implementation of first aspect, described the second filter circuit comprises the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 3rd capacitor C 3, the 4th capacitor C 4 and the second integrated transporting discharging U2, described the 5th resistance R 5 and the 6th resistance R 6 are connected in series to the in-phase input end of described the second integrated transporting discharging U2, one end of described the 3rd capacitor C 3 is connected between described the 5th resistance R 5 and the 6th resistance R 6, the other end of described the 3rd capacitor C 3 is connected to the inverting input of described the second integrated transporting discharging U2 by described the 7th resistance R 7, the reverse input end of the second integrated transporting discharging U2 is connected to the output of described the second integrated transporting discharging U2 by described the 7th resistance R 7, the in-phase input end of described the second integrated transporting discharging U2 is by described the 4th capacitor C 4 ground connection.
In the 4th kind of possible implementation of first aspect, described power amplifier module comprises the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 5th capacitor C 5, the first triode Q1, the second triode Q2 and the 3rd integrated transporting discharging U3, described the 5th capacitor C 5 is connected to the in-phase input end of described the 3rd integrated transporting discharging U3, the inverting input of described the 3rd integrated transporting discharging U3 is by described the 8th resistance R 8 ground connection, the inverting input of described the 3rd integrated transporting discharging U3 is connected to the output of described the 3rd integrated transporting discharging U3 by described the 9th resistance R 9, the positive power source terminal of described the 3rd integrated transporting discharging U3 connects positive source by described the 11 resistance R 11, the negative power end of described the 3rd integrated transporting discharging U3 connects power cathode by described the tenth resistance R 10, the base stage of described the first triode Q1 connects the positive power source terminal of described the 3rd integrated transporting discharging U3, the base stage of described the second triode Q2 connects the negative power end of described the 3rd integrated transporting discharging U3, the colelctor electrode of described the first triode Q1 is connected with the colelctor electrode of described the second triode Q2, the emitter stage of described the first triode Q1 connects positive source by the 12 resistance R 12, the emitter stage of described the second triode Q2 connects power cathode by described the 13 resistance R 13, the output of described the 3rd integrated transporting discharging U3 connects one end of described the 14 resistance R 14, the other end of described the 14 resistance R 14 is connected between the colelctor electrode of described the first triode Q1 and the colelctor electrode of the second triode Q2.
In the 5th kind of possible implementation of first aspect, described boost module comprises one group of shunt capacitance, the 15 resistance R 15, the 16 resistance R 16, the 8th capacitor C 8 and the first transformer T1, after described one group of shunt capacitance is in parallel with described the 15 resistance R 15, be connected to one end of primary coil of one group of Same Name of Ends of described the first transformer T1, the other end ground connection of the primary coil of another group Same Name of Ends of described the first transformer T1, one end of the secondary coil of one group of Same Name of Ends of described the first transformer T1 connects described the 16 resistance R 16 and transmits described in exporting, the other end of the secondary coil of another group Same Name of Ends of described the first transformer T1 is by described the 8th capacitor C 8 ground connection.
In the 6th kind of possible implementation of first aspect, described current measurement module comprises the second transformer T2, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 9th capacitor C 9 and the 4th integrated transporting discharging U4, one end of the primary coil of one group of Same Name of Ends of described the second transformer T2 is used for connecing shielding line, the other end of the primary coil of another group Same Name of Ends of described the second transformer T2 is for receiving electrode, the other end of the primary coil of another group Same Name of Ends of described the second transformer T2 also connects the 9th capacitor C 9 for connecing shielding line by the 9th capacitor C 9, one end of the secondary coil of one group of Same Name of Ends of described the second transformer T2 connects the in-phase input end of described the 4th integrated transporting discharging U4 by described the 19 resistance R 19, the other end of the secondary coil of another group Same Name of Ends of described the second transformer T2 connects the inverting input of described the 4th integrated transporting discharging U4 by described the 17 resistance R 17, the inverting input of described the 4th integrated transporting discharging U4 connects the output of described the 4th integrated transporting discharging U4 by described the 18 resistance R 18, the output of described the 4th integrated transporting discharging U4 is for exporting the current data of measurement.
In the 7th kind of possible implementation of first aspect, described voltage measurement module comprises the 20 resistance R 20, the 21 resistance R 21, the 22 resistance R 22 and the 5th integrated transporting discharging U5, the reverse input end of described the 5th integrated transporting discharging U5 connects described the 20 resistance R 20, the reverse input end of described the 5th integrated transporting discharging U5 is connected to the output of described the 5th integrated transporting discharging U5 by described the 22 resistance R 22, the in-phase input end of described the 5th integrated transporting discharging U5 is by described the 21 resistance R 21 ground connection, the output of described the 5th integrated transporting discharging U5 is for exporting the voltage data of measurement.
Second aspect present invention provides a kind of microresistivity scanning imagery well logging apparatus, can comprise: at least one pole plate, on each pole plate, there is DSP, digital to analog converter, the radiating circuit of two emission electrodes and two foregoing microresistivity scanning imagery well logging apparatus, the described boost module of each radiating circuit is connected with an emission electrode respectively, it is identical that described DSP is used for generating two frequencies, opposite polarity Digital AC pumping signal, and two ac-excited signals of numeral that generate are transferred to described digital to analog converter, described digital to analog converter is for converting described two ac-excited signals of numeral to two analog signals, and two analog signals are transferred to respectively to the radiating circuit of described two microresistivity scanning imagery well logging apparatus, the emission electrode output that described radiating circuit is connected by the boost module 104 with this radiating circuit transmits.
In the possible implementation of the first of second aspect, described each pole plate also comprises single-chip microcomputer, the radiating circuit of described microresistivity scanning imagery well logging apparatus is also for sending to described DSP by the voltage data of the current data of described measurement and measurement, described DSP also sends to described single-chip microcomputer for described current data and the described voltage data that the radiating circuit from described microresistivity scanning imagery well logging apparatus is received, and described single-chip microcomputer is used for exporting described current data and voltage data to show and/or to analyze.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
In the embodiment of the present invention, by setting gradually filter module, power amplifier module and boost module, the radiating circuit of this microresistivity scanning imagery well logging apparatus can be exported enough large transmitting according to the ac-excited signal receiving, can make to transmit enters in stratum through the mud insulating layer forming between electrode and the borehole wall or mud cake, thereby can in the situation that using oil-base mud or synthetic base mud, carry out microresistivity scanning imagery.Simultaneously, the radiating circuit of this microresistivity scanning imagery well logging apparatus can also detect electric current and the voltage swing transmitting, to send the current data detecting and voltage data to ground treatment system, show and analyze transmitting of radiating circuit.
Term " first " in manual of the present invention and claims and above-mentioned accompanying drawing, " second ", " the 3rd " " 4th " etc. are for distinguishing similar object, and needn't be for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so that the embodiments described herein can be implemented with the order the content except here diagram or description.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, for example, those steps or unit that the process that has comprised series of steps or unit, method, system, product or equipment are not necessarily limited to clearly list, but can comprise clearly do not list or for these processes, method, product or equipment intrinsic other step or unit.
The above, above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Accompanying drawing explanation
Fig. 1 is embodiment 1 schematic diagram of the radiating circuit of microresistivity scanning imagery well logging apparatus in the embodiment of the present invention;
Fig. 2 is embodiment 2 schematic diagrames of the radiating circuit of microresistivity scanning imagery well logging apparatus in the embodiment of the present invention;
Fig. 3 is an embodiment schematic diagram of a kind of microresistivity scanning imagery well logging apparatus in the embodiment of the present invention.
The specific embodiment
The embodiment of the present invention provides a kind of radiating circuit and microresistivity scanning imagery well logging apparatus of microresistivity scanning imagery well logging apparatus, larger transmitting can be provided, and can monitor in real time electric current and the voltage swing transmitting, to be suitable for carrying out microresistivity scanning imagery in oil-base mud and synthetic base mud.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.
Fig. 1 is embodiment 1 schematic diagram of the radiating circuit of microresistivity scanning imagery well logging apparatus in the embodiment of the present invention.Consult Fig. 1, in the embodiment of the present invention, the radiating circuit of microresistivity scanning imagery well logging apparatus can comprise: filter module 100, power amplifier module 103, boost module 104, current measurement module 105 and voltage measurement module 106, described filter module 100, power amplifier module 103, boost module 104 and current measurement module 105 are connected in series successively, described voltage measurement module 106 is connected in parallel with described current measurement module 105, described filter module 100 is for receiving ac signal and described ac signal being carried out to filtering, described power amplifier module 103 is for amplifying filtered ac signal, described boost module 104 boosts to generate for the ac signal to after amplifying and output transmits, described current measurement module 105 is for measuring and export the current data of measurement to the described size of current transmitting, described voltage measurement module 106 is for measuring and export the voltage data of measurement to the described voltage swing transmitting.
Wherein, described filter module 100 is for receiving ac signal from outside, this ac signal is as the pumping signal of this radiating circuit, and 100 pairs of these pumping signals of described filter module are carried out filtering, and by filtered pumping signal input power amplifier module 103.
Described power amplifier module 103 is for filtered ac signal is amplified, and the ac signal after amplifying is input to boost module 104.
104 pairs of ac signals of described boost module boost, and the ac signal after boosting is as the transmitting of emission current signal, thereby transmit, can for example by the electrode being connected with boost module 104, launch and enter in the mud column and stratum in oil well.
Described current measurement module 105 is for measuring the size of current transmitting and exporting the current data of measuring, so that the follow-up size of current transmitting that is shown and analyzed radiating circuit by ground treatment system.
Described voltage measurement module 106 is for measuring the voltage swing transmitting and exporting the voltage data of measuring, so that the follow-up voltage swing transmitting that is shown and analyzed radiating circuit by ground treatment system.
In the present embodiment, by setting gradually filter module 100, power amplifier module 103 and boost module 104, this radiating circuit can be exported larger transmitting according to the ac-excited signal receiving, can make to transmit enters in the mud column and stratum in oil well through the mud insulating layer forming between electrode and the borehole wall or mud cake, thereby can in the situation that using oil-base mud or synthetic base mud, carry out microresistivity scanning imagery.Simultaneously, the radiating circuit of this microresistivity scanning imagery well logging apparatus can also detect electric current and the voltage swing transmitting, to send the current data detecting and voltage data to ground treatment system, show and analyze transmitting of radiating circuit.
Fig. 2 is embodiment 2 schematic diagrames of the radiating circuit of microresistivity scanning imagery well logging apparatus in the embodiment of the present invention.This embodiment 2 can regard a kind of specific implementation on embodiment 1 basis as.
Consult Fig. 2, in the present embodiment, described filter module 100 can comprise the first filter circuit and the second filter circuit, and described the first filter circuit is connected with described the second filter circuit.By adopting two stage filter circuit, the interference in filtering pumping signal better, the ac signal of output smoothing.
Preferably, described the first filter circuit can comprise the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1, the second capacitor C 2 and the first integrated transporting discharging U1, described the first resistance R 1 and the second resistance R 2 are connected in series to the in-phase input end of described the first integrated transporting discharging U1, one end of described the first capacitor C 1 is connected between described the first resistance R 1 and the second resistance R 2, the other end of described the first capacitor C 1 is connected to the inverting input of described the first integrated transporting discharging U1 by described the 3rd resistance R 3, the reverse input end of described the first integrated transporting discharging U1 is connected to the output of described the first integrated transporting discharging U1 by described the 3rd resistance R 3, the inverting input of described the first integrated transporting discharging U1 is by described the 4th resistance R 4 ground connection, the in-phase input end of described the first integrated transporting discharging U1 is by described the second capacitor C 2 ground connection.
Wherein, the first resistance R 1 that outside alternating current driver signal enters this first filter circuit, carries out after filtering through this first filter circuit, from the output of the first integrated transporting discharging U1, exports filtered ac signal for the first time.
Preferably, described the second filter circuit can comprise the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 3rd capacitor C 3, the 4th capacitor C 4 and the second integrated transporting discharging U2, described the 5th resistance R 5 and the 6th resistance R 6 are connected in series to the in-phase input end of described the second integrated transporting discharging U2, one end of described the 3rd capacitor C 3 is connected between described the 5th resistance R 5 and the 6th resistance R 6, the other end of described the 3rd capacitor C 3 is connected to the inverting input of described the second integrated transporting discharging U2 by described the 7th resistance R 7, the reverse input end of described the second integrated transporting discharging U2 is connected to the output of described the second integrated transporting discharging U2 by described the 7th resistance R 7, the in-phase input end of described the second integrated transporting discharging U2 is by described the 4th capacitor C 4 ground connection.
Wherein, the first resistance R 5 that the alternating current driver signal of exporting from the first filter circuit enters this second filter circuit, carries out after filtering through this second filter circuit, from the output of the second integrated transporting discharging U2, exports filtered ac signal for the second time.
Be appreciated that it is only exemplary that above-mentioned filter module 100 adopts the form of secondary filter circuit, and be not used in restriction the present invention, those skilled in the art also can adopt first-level filtering wave circuit or according to actual needs more than the filter circuit of secondary.
Preferably, described power amplifier module 103 can comprise the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 5th capacitor C 5, the first triode Q1, the second triode Q2 and the 3rd integrated transporting discharging U3, described the 5th capacitor C 5 is connected to the in-phase input end of described the 3rd integrated transporting discharging U3, the inverting input of described the 3rd integrated transporting discharging U3 is by described the 8th resistance R 8 ground connection, the inverting input of described the 3rd integrated transporting discharging U3 is connected to the output of described the 3rd integrated transporting discharging U3 by described the 9th resistance R 9, the positive power source terminal of described the 3rd integrated transporting discharging U3 connects positive source by described the 11 resistance R 11, the negative power end of described the 3rd integrated transporting discharging U3 connects power cathode by described the tenth resistance R 10, the base stage of described the first triode Q1 connects the positive power source terminal of described the 3rd integrated transporting discharging U3, the base stage of described the second triode Q2 connects the negative power end of described the 3rd integrated transporting discharging U3, the colelctor electrode of described the first triode Q1 is connected with the colelctor electrode of described the second triode Q2, the emitter stage of described the first triode Q1 connects positive source by the 12 resistance R 12, the emitter stage of described the second triode Q2 connects power cathode by described the 13 resistance R 13, the output of described the 3rd integrated transporting discharging U3 connects one end of described the 14 resistance R 14, the other end of described the 14 resistance R 14 is connected between the colelctor electrode of described the first triode Q1 and the colelctor electrode of the second triode Q2.Further preferably, as shown in Figure 2, described power cathode can pass through a capacity earth, and described positive source also can pass through a capacity earth, for elimination noise.
Wherein, the 5th capacitor C 5 that the filtered pumping signal of exporting from filter module 100 enters this power amplifier module 103, via this power amplifier module 103, carry out after power amplification, ac signal is exported by the 14 resistance R 14 from the output of the 3rd integrated transporting discharging U3.
Preferably, described boost module 104 can comprise one group of shunt capacitance, the 15 resistance R 15, the 16 resistance R 16, the 8th capacitor C 8 and the first transformer T1, after described one group of shunt capacitance is in parallel with described the 15 resistance R 15, be connected to one end of primary coil of one group of Same Name of Ends of described the first transformer T1, the other end ground connection of the primary coil of another group Same Name of Ends of described the first transformer T1, one end of the secondary coil of one group of Same Name of Ends of described the first transformer T1 connects described the 16 resistance R 16 and transmits described in exporting, the other end of the secondary coil of another group Same Name of Ends of described the first transformer T1 is by described the 8th capacitor C 8 ground connection.
Wherein, from the ac signal of power amplifier module 103 output, enter one group of shunt capacitance and the 15 resistance R 15 of this boost module 104, by this group of shunt capacitance and the 15 resistance R 15, enter the primary coil of the first transformer T1, after boosting by the first transformer T1, from the secondary coil of the first transformer T1, by the 16 resistance R 16 outputs, transmit.Preferably, can also be by the output termination shielding line of this boost module 104, shielding layer grounding, thus external interfering signal can be imported to the earth by shielding line.Described one group of shunt capacitance is preferably and adopts six Capacitance parallel connections, certainly, also can adopt as required one group of shunt capacitance greater or less than six electric capacity.
Preferably, described current measurement module 105 comprises the second transformer T2, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 9th capacitor C 9 and the 4th integrated transporting discharging U4, one end of the primary coil of one group of Same Name of Ends of described the second transformer T2 is used for connecing shielding line (being generally connected to the screen layer of shielding line), the other end of the primary coil of another group Same Name of Ends of described the second transformer T2 is for (for example, by shielding core) receiving electrode, the other end of the primary coil of another group Same Name of Ends of described the second transformer T2 also connects the 9th capacitor C 9 for connect shielding line (being generally connected to the screen layer of shielding line) by the 9th capacitor C 9, one end of the secondary coil of one group of Same Name of Ends of described the second transformer T2 connects the in-phase input end of described the 4th integrated transporting discharging U4 by described the 19 resistance R 19, the other end of the secondary coil of another group Same Name of Ends of described the second transformer T2 connects the inverting input of described the 4th integrated transporting discharging U4 by described the 17 resistance R 17, the inverting input of described the 4th integrated transporting discharging U4 connects the output of described the 4th integrated transporting discharging U4 by described the 18 resistance R 18, the output of described the 4th integrated transporting discharging U4 is for exporting the current data of measurement.Further preferably, the positive supply termination positive source of described the 4th integrated transporting discharging U4, positive source can pass through a capacity earth, the negative supply termination power cathode of described the 4th integrated transporting discharging U4, described positive source also can pass through a capacity earth, can elimination noise by electric capacity.The other end of the primary coil of another group Same Name of Ends of described the second transformer T2 can also pass through a resistance eutral grounding.
Wherein, transmitting and can arrive electrode the primary coil by the second transformer T2 from boost module 104 outputs, then from electrode, launch and enter in oil well mud column and stratum, can adopt two tranmitting frequencies identical, the opposite polarity radiating circuit transmitting is used in conjunction with, by simultaneously identical to stratum tranmitting frequency, opposite polarity interchange transmits, interchange is transmitted and between two radiating circuits and stratum, form loop, can obtain log picture by measuring the current signal in stratum and current signal being carried out to analyzing and processing.One end of the primary coil of the second transformer T2 can also connect by the 9th capacitor C 9 screen layer of shielding line, for by the interfering signal in the transmitting of output, the screen layer by shielding line imports the earth.
Meanwhile, the alternating current of the secondary coil of the second transformer T2 output is by exporting the current data of measuring, the size of current of this current data for representing to transmit after the 4th integrated transporting discharging U4.The current data of this measurement can be transferred to ground treatment system, thereby treatment system can show and analyze the size of current transmitting of radiating circuit.
Preferably, described voltage measurement module 106 can comprise the 20 resistance R the 20, the 21 resistance R the 21, the 22 resistance R 22 and the 5th integrated transporting discharging U5, the reverse input end of described the 5th integrated transporting discharging U5 connects described the 20 resistance R 20, the reverse input end of described the 5th integrated transporting discharging U5 is connected to the output of described the 5th integrated transporting discharging U5 by described the 22 resistance R 22, the in-phase input end of described the 5th integrated transporting discharging U5 is by described the 21 resistance R 21 ground connection, and the output of described the 5th integrated transporting discharging U5 is for exporting the voltage data of measurement.Further preferably, as shown in Figure 2, the in-phase input end of described the 5th integrated transporting discharging U5 can also carry out ground connection by an electric capacity, for elimination noise.
Wherein, from boost module 104 transmitting of output, can enter the 20 resistance R 20 of this voltage measurement module 106, and the voltage data of measuring from the output output of the 5th integrated transporting discharging U5, the voltage swing of this voltage data for representing to transmit.The voltage data of this measurement can be transferred to ground treatment system, thereby treatment system can show and analyze the size of current transmitting of radiating circuit.
The specific implementation of the radiating circuit of this embodiment microresistivity scanning imagery well logging apparatus, first by multi-stage filter circuit, the pumping signal of input is carried out to filtering effectively, then by 103 pairs of signals of power amplifier module, carry out power amplification, AC signal enters boost module 104 again, formation voltage and electric current be enough large transmitting all, transmitting of generating can enter in stratum through the mud insulating layer forming between electrode and the borehole wall or mud cake, and then can in the situation that using oil-base mud or synthetic base mud, carry out microresistivity scanning imagery.In this embodiment, the specific implementation of radiating circuit is by wave filter, arrange electric capacity and in the mode of the external shielding line of radiating circuit output at earth terminal, can effectively remove interfering signal, thereby be convenient to obtain exactly log picture, realize better imaging in oil-base mud and synthetic base mud.On the other hand, the specific implementation small volume of this radiating circuit, is convenient to be integrated on the pole plate of microresistivity scanning imagery well logging apparatus, and easy to process, cost is low.
Above the radiating circuit for micro-resistance scan in the embodiment of the present invention is described, below the microresistivity scanning imagery well logging apparatus in the embodiment of the present invention is described.
The present invention also provides a kind of microresistivity scanning imagery well logging apparatus.Consult Fig. 3, in the embodiment of the present invention, a kind of microresistivity scanning imagery well logging apparatus can comprise: at least one pole plate, on each pole plate, there is DSP, digital to analog converter (DAC), the radiating circuit of two emission electrodes and two foregoing microresistivity scanning imagery well logging apparatus, the described boost module 104 of each radiating circuit is connected with an emission electrode respectively, it is identical that described DSP is used for generating two frequencies, opposite polarity Digital AC pumping signal, and two ac-excited signals of numeral that generate are transferred to described digital to analog converter, described digital to analog converter is for converting described two ac-excited signals of numeral to two analog signals, and two analog signals are transferred to respectively to the radiating circuit of described two microresistivity scanning imagery well logging apparatus, the emission electrode output that described radiating circuit is connected by the boost module 104 with this radiating circuit transmits.
Wherein, microresistivity scanning imagery well logging apparatus can comprise circuit and at least one pole plate, and it is upper that described at least one pole plate can be arranged on probe, during well logging, probe is goed deep under oil well, and the pole plate on probe is attached on the borehole wall.The radiating circuit on each pole plate with two emission electrodes and two foregoing microresistivity scanning imagery well logging apparatus, the described boost module 104 of each radiating circuit is connected with an emission electrode respectively, identical by controlling two frequencies of DSP generation, (for example two frequencies are identical for opposite polarity Digital AC pumping signal, opposite polarity digital sine pumping signal), two ac-excited signals of numeral are carried out after digital-to-analogue conversion, convert two analog signals to, then two analog signals are input to respectively to two radiating circuits, it is identical that two radiating circuits can generate two frequencies according to described two analog signals, opposite polarity transmitting, these two transmit and by two emission electrodes, output to the borehole wall respectively, two frequencies are identical, opposite polarity interchange transmits and can between two radiating circuits and stratum, form loop, and then, can be by measuring the current signal in stratum, for obtaining log, look like to provide relevant parameter.
Preferably, it is characterized in that, described each pole plate also comprises single-chip microcomputer, the radiating circuit of described microresistivity scanning imagery well logging apparatus is also for sending to described DSP by the voltage data of the current data of described measurement and measurement, described DSP also sends to described single-chip microcomputer for described current data and the described voltage data that the radiating circuit from described microresistivity scanning imagery well logging apparatus is received, and described single-chip microcomputer is used for exporting described current data and voltage data to show and/or to analyze.
Wherein, single-chip microcomputer can be used as main control chip, be used for to DSP transmit operation instruction, such as transmitter trigger instruction, transmitting halt instruction etc., described DSP carries out corresponding operating according to the operational order of described single-chip microcomputer, for example, when the transmitter trigger instruction of receiving single-chip microcomputer, just start to generate two identical, opposite polarity Digital AC pumping signals of frequency.Described DSP is also for being transferred to by described current data and described voltage data the treatment system resting on the ground by circuit, treatment system can show and/or analyze described current data and voltage data, so just can staff have monitored on the ground the electric current that transmits and voltage swing.
Described at least one pole plate for example can adopt six pole plates, to collect more resistivity in microresistivity scanning imagery, obtains better log picture, thereby can carry out better analyzing and processing.Be appreciated that those skilled in the art can adopt as required greater or less than six pole plates.
In the embodiment of the present invention, this microresistivity scanning imagery well logging apparatus generates two identical, opposite polarity Digital AC pumping signals of frequency by controlling DSP, then by radiating circuit output current enough large interchange transmit, the interchange of transmitting transmits and can enter in stratum through the mud insulating layer forming between electrode and the borehole wall or mud cake, and form loop between two radiating circuits and stratum, thereby can make to transmit, in the situation that using oil-base mud or synthetic base mud, carry out microresistivity scanning imagery.Simultaneously, the radiating circuit of this microresistivity scanning imagery well logging apparatus can also detect electric current and the voltage swing transmitting, to send the current data detecting and voltage data to ground treatment system, show and analyze transmitting of radiating circuit.
Claims (10)
1. the radiating circuit of a microresistivity scanning imagery well logging apparatus, it is characterized in that, comprise: filter module (100), power amplifier module (103), boost module (104), current measurement module (105) and voltage measurement module (106), described filter module (100), power amplifier module (103), boost module (104) and current measurement module (105) are connected in series successively, described voltage measurement module (106) is connected in parallel with described current measurement module (105), described filter module (100) is for receiving ac signal and described ac signal being carried out to filtering, described power amplifier module (103) is for amplifying filtered ac signal, described boost module (104) boosts to generate for the ac signal to after amplifying and output transmits, described current measurement module (105) is for measuring and export the current data of measurement to the described size of current transmitting, described voltage measurement module (106) is for measuring and export the voltage data of measurement to the described voltage swing transmitting.
2. radiating circuit according to claim 1, it is characterized in that, described filter module (100) comprises the first filter circuit (101) and the second filter circuit (102), and described the first filter circuit (101) is connected with described the second filter circuit (102).
3. radiating circuit according to claim 2, it is characterized in that, described the first filter circuit (101) comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1, the second capacitor C 2 and the first integrated transporting discharging U1, described the first resistance R 1 and the second resistance R 2 are connected in series to the in-phase input end of described the first integrated transporting discharging U1, one end of described the first capacitor C 1 is connected between described the first resistance R 1 and the second resistance R 2, the other end of described the first capacitor C 1 is connected to the inverting input of described the first integrated transporting discharging U1 by described the 3rd resistance R 3, the reverse input end of described the first integrated transporting discharging U1 is connected to the output of described the first integrated transporting discharging U1 by described the 3rd resistance R 3, the inverting input of described the first integrated transporting discharging U1 is by described the 4th resistance R 4 ground connection, the in-phase input end of described the first integrated transporting discharging U1 is by described the second capacitor C 2 ground connection.
4. according to the radiating circuit described in claim 2 or 3, it is characterized in that, described the second filter circuit (102) comprises the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 3rd capacitor C 3, the 4th capacitor C 4 and the second integrated transporting discharging U2, described the 5th resistance R 5 and the 6th resistance R 6 are connected in series to the in-phase input end of described the second integrated transporting discharging U2, one end of described the 3rd capacitor C 3 is connected between described the 5th resistance R 5 and the 6th resistance R 6, the other end of described the 3rd capacitor C 3 is connected to the inverting input of described the second integrated transporting discharging U2 by described the 7th resistance R 7, the reverse input end of the second integrated transporting discharging U2 is connected to the output of described the second integrated transporting discharging U2 by described the 7th resistance R 7, the in-phase input end of described the second integrated transporting discharging U2 is by described the 4th capacitor C 4 ground connection.
5. according to the radiating circuit described in any one in claim 1-4, it is characterized in that, described power amplifier module (103) comprises the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 5th capacitor C 5, the first triode Q1, the second triode Q2 and the 3rd integrated transporting discharging U3, described the 5th capacitor C 5 is connected to the in-phase input end of described the 3rd integrated transporting discharging U3, the inverting input of described the 3rd integrated transporting discharging U3 is by described the 8th resistance R 8 ground connection, the inverting input of described the 3rd integrated transporting discharging U3 is connected to the output of described the 3rd integrated transporting discharging U3 by described the 9th resistance R 9, the positive power source terminal of described the 3rd integrated transporting discharging U3 connects positive source by described the 11 resistance R 11, the negative power end of described the 3rd integrated transporting discharging U3 connects power cathode by described the tenth resistance R 10, the base stage of described the first triode Q1 connects the positive power source terminal of described the 3rd integrated transporting discharging U3, the base stage of described the second triode Q2 connects the negative power end of described the 3rd integrated transporting discharging U3, the colelctor electrode of described the first triode Q1 is connected with the colelctor electrode of described the second triode Q2, the emitter stage of described the first triode Q1 connects positive source by the 12 resistance R 12, the emitter stage of described the second triode Q2 connects power cathode by described the 13 resistance R 13, the output of described the 3rd integrated transporting discharging U3 connects one end of described the 14 resistance R 14, the other end of described the 14 resistance R 14 is connected between the colelctor electrode of described the first triode Q1 and the colelctor electrode of the second triode Q2.
6. according to the radiating circuit described in any one in claim 1-5, it is characterized in that, described boost module (104) comprises one group of shunt capacitance, the 15 resistance R 15, the 16 resistance R 16, the 8th capacitor C 8 and the first transformer T1, after described one group of shunt capacitance is in parallel with described the 15 resistance R 15, be connected to one end of primary coil of one group of Same Name of Ends of described the first transformer T1, the other end ground connection of the primary coil of another group Same Name of Ends of described the first transformer T1, one end of the secondary coil of one group of Same Name of Ends of described the first transformer T1 connects described the 16 resistance R 16 and transmits described in exporting, the other end of the secondary coil of another group Same Name of Ends of described the first transformer T1 is by described the 8th capacitor C 8 ground connection.
7. according to the radiating circuit described in any one in claim 1-6, it is characterized in that, described current measurement module (105) comprises the second transformer T2, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 9th capacitor C 9 and the 4th integrated transporting discharging U4, one end of the primary coil of one group of Same Name of Ends of described the second transformer T2 is used for connecing shielding line, the other end of the primary coil of another group Same Name of Ends of described the second transformer T2 is for receiving electrode, the other end of the primary coil of another group Same Name of Ends of described the second transformer T2 also connects the 9th capacitor C 9 for connecing shielding line by the 9th capacitor C 9, one end of the secondary coil of one group of Same Name of Ends of described the second transformer T2 connects the in-phase input end of described the 4th integrated transporting discharging U4 by described the 19 resistance R 19, the other end of the secondary coil of another group Same Name of Ends of described the second transformer T2 connects the inverting input of described the 4th integrated transporting discharging U4 by described the 17 resistance R 17, the inverting input of described the 4th integrated transporting discharging U4 connects the output of described the 4th integrated transporting discharging U4 by described the 18 resistance R 18, the output of described the 4th integrated transporting discharging U4 is for exporting the current data of measurement.
8. according to the radiating circuit described in any one in claim 1-7, it is characterized in that, described voltage measurement module (106) comprises the 20 resistance R 20, the 21 resistance R 21, the 22 resistance R 22 and the 5th integrated transporting discharging U5, the reverse input end of described the 5th integrated transporting discharging U5 connects described the 20 resistance R 20, the reverse input end of described the 5th integrated transporting discharging U5 is connected to the output of described the 5th integrated transporting discharging U5 by described the 22 resistance R 22, the in-phase input end of described the 5th integrated transporting discharging U5 is by described the 21 resistance R 21 ground connection, the output of described the 5th integrated transporting discharging U5 is for exporting the voltage data of measurement.
9. a microresistivity scanning imagery well logging apparatus, it is characterized in that, this microresistivity scanning imagery well logging apparatus comprises at least one pole plate, on each pole plate, there is DSP, digital to analog converter, two emission electrodes and two are according to the radiating circuit of the microresistivity scanning imagery well logging apparatus described in any one in claim 1-8, the described boost module (104) of each radiating circuit is connected with an emission electrode respectively, it is identical that described DSP is used for generating two frequencies, opposite polarity Digital AC pumping signal, and two ac-excited signals of numeral that generate are transferred to described digital to analog converter, described digital to analog converter is for converting described two ac-excited signals of numeral to two analog signals, and two analog signals are transferred to respectively to the radiating circuit of described two microresistivity scanning imagery well logging apparatus, the emission electrode output that described radiating circuit is connected by the boost module with this radiating circuit (104) transmits.
10. microresistivity scanning imagery well logging apparatus according to claim 9, it is characterized in that, described each pole plate also comprises single-chip microcomputer, the radiating circuit of described microresistivity scanning imagery well logging apparatus is also for sending to described DSP by the voltage data of the current data of described measurement and measurement, described DSP also sends to described single-chip microcomputer for described current data and the described voltage data that the radiating circuit from described microresistivity scanning imagery well logging apparatus is received, and described single-chip microcomputer is used for exporting described current data and voltage data to show and/or to analyze.
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| CN201410344449.XA CN104074515B (en) | 2014-07-18 | Micro-resisitivity image device and radiating circuit thereof |
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| CN201410344449.XA CN104074515B (en) | 2014-07-18 | Micro-resisitivity image device and radiating circuit thereof |
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| CN110410064A (en) * | 2019-06-19 | 2019-11-05 | 中国石油天然气集团有限公司 | A kind of imaging logging pipe nipple structure and rotary steerable drilling device based on rotary steering |
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