CN104074515B - Micro-resisitivity image device and radiating circuit thereof - Google Patents
Micro-resisitivity image device and radiating circuit thereof Download PDFInfo
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Abstract
The invention discloses a kind of micro-resisitivity image device and radiating circuit thereof.This radiating circuit includes: filter module, power amplifier module, boost module, current measurement module and voltage measurement module, filter module is used for receiving ac signal and being filtered described ac signal, power amplifier module is for being amplified filtered ac signal, boost module is for boosting to generate to the ac signal after amplifying and output transmitting signal, current measurement module is for measuring to the size of current launching signal and export the current data of measurement, voltage measurement module is for measuring to the voltage swing launching signal and export the voltage data of measurement.This radiating circuit and micro-resisitivity image device can export sufficiently large transmitting signal, make transmitting signal enter in stratum through the mud insulating barrier electrode and the borehole wall or mud cake, be suitable to carry out micro resistor in oil base or synthesis base mud.
Description
Technical field
The present invention relates to petroleum exploration field, particularly relate to a kind of micro-resisitivity image device
Radiating circuit and micro-resisitivity image device.
Background technology
Micro-resisitivity image can reflect geological structure, porosity in well more accurately, intuitively
And the important information such as fractue spacing, therefore, it is applied to each of petroleum exploration and development more and more widely
In important step.
At present, in order to gather high-quality micro-resistivity imaging data information, water-base mud can only be used.
Because the resistivity of electric conductivity water-base mud and mud cake is low, it is possible to obtain the telecommunications in the strongest stratum
Number response, such that it is able to obtain log clearly.
Due to oil-base mud can high temperature resistance, salt resistance erosion, there is excellent hole stability performance, with
And synthesis base mud can reduce the impact on environment, reduce risks and improve drilling efficiency, so, when
Oil-base mud and synthesis base mud are being developed and promoted the use of to the present.But, at oil-base mud and synthesis base
This kind of mud of mud carries out micro-resisitivity image there is certain technology barrier.This is because
When carrying out micro resistor in oil-base mud and synthesis base mud, emission electrode and the borehole wall it
Between can form mud insulating barrier or mud cake, separated pole plate and contacting of stratum and can not imaging.So,
Need to develop a kind of dress that can be adapted to carry out micro-resistance scan imaging in oil-base mud and synthesis base mud
Put.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, embodiments provide a kind of micro-resistance
The radiating circuit of rate scanning imagery well logging apparatus and micro-resisitivity image device, using the teaching of the invention it is possible to provide more
Big emission current, and electric current and the voltage swing launching signal can be monitored in real time, it is suitable at oil
Base mud and synthesis base mud carry out micro resistor.
First aspect present invention provides the radiating circuit of a kind of micro-resisitivity image device, can wrap
Include: filter module, power amplifier module, boost module, current measurement module and voltage measurement mould
Block, described filter module, power amplifier module, boost module and current measurement module are sequentially connected in series
Connecting, described voltage measurement module is connected in parallel with described current measurement module, and described filter module is used
In being filtered ac signal, described power amplifier module is for filtered ac signal
Being amplified, described boost module launches letter for boosting the ac signal after amplifying to generate
Number, described current measurement module is for measuring the size of current of described transmitting signal and export measurement
Current data, described voltage measurement module is for measuring also the voltage swing of described transmitting signal
The voltage data that output is measured.
In the first possible implementation of first aspect, described filter module includes the first filtering
Circuit and the second filter circuit, described first filter circuit is connected with described second filter circuit.
In the implementation that the second of first aspect is possible, described first filter circuit includes the first electricity
Resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the first electric capacity C1, the second electric capacity
C2 and the first integrated transporting discharging U1, described first resistance R1 and the second resistance R2 are connected in series to described
The in-phase input end of one integrated transporting discharging U1, one end of described first electric capacity C1 is connected to described first resistance
Between R1 and the second resistance R2, the other end of described first electric capacity C1 is by described 3rd resistance R3 even
Receive the inverting input of described first integrated transporting discharging U1, the reverse input of described first integrated transporting discharging U1
End is connected to the outfan of described first integrated transporting discharging U1, described first collection by described 3rd resistance R3
Become the inverting input of amplifier U1 by described 4th resistance R4 ground connection, described first integrated transporting discharging U1
In-phase input end by described second electric capacity C2 ground connection.
In the third possible implementation of first aspect, described second filter circuit includes the 5th electricity
Resistance R5, the 6th resistance R6, the 7th resistance R7, the 3rd electric capacity C3, the 4th electric capacity C4 and second are integrated
Amplifier U2, described 5th resistance R5 and the 6th resistance R6 is connected in series to described second integrated transporting discharging U2
In-phase input end, one end of described 3rd electric capacity C3 is connected to described 5th resistance R5 and the 6th resistance
Between R6, the other end of described 3rd electric capacity C3 is connected to described second collection by described 7th resistance R7
Becoming the inverting input of amplifier U2, the reverse input end of the second integrated transporting discharging U2 passes through described 7th resistance
R7 is connected to the outfan of described second integrated transporting discharging U2, the homophase input of described second integrated transporting discharging U2
End is by described 4th electric capacity C4 ground connection.
In the 4th kind of possible implementation of first aspect, described power amplifier module includes the 8th
Resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12,
13rd resistance R13, the 14th resistance R14, the 5th electric capacity C5, the first audion Q1, the two or three pole
Pipe Q2 and the 3rd integrated transporting discharging U3, described 5th electric capacity C5 are connected to described 3rd integrated transporting discharging U3's
In-phase input end, the inverting input of described 3rd integrated transporting discharging U3 passes through described 8th resistance R8 ground connection,
The inverting input of described 3rd integrated transporting discharging U3 is connected to described 3rd collection by described 9th resistance R9
Becoming the outfan of amplifier U3, the positive power source terminal of described 3rd integrated transporting discharging U3 passes through described 11st resistance
R11 connects positive source, and the negative power end of described 3rd integrated transporting discharging U3 is connect by described tenth resistance R10
Power cathode, the base stage of described first audion Q1 connects the positive power source terminal of described 3rd integrated transporting discharging U3,
The negative power end of the base stage described 3rd integrated transporting discharging U3 of connection of described second audion Q2, described first
The colelctor electrode of audion Q1 is connected with the colelctor electrode of described second audion Q2, described first audion
The emitter stage of Q1 connects positive source, the emitter stage of described second audion Q2 by the 12nd resistance R12
Connecing power cathode by described 13rd resistance R13, the outfan of described 3rd integrated transporting discharging U3 connects institute
Stating one end of the 14th resistance R14, the other end of described 14th resistance R14 is connected to the described 1st
Between colelctor electrode and the colelctor electrode of the second audion Q2 of pole pipe Q1.
In the 5th kind of possible implementation of first aspect, described boost module includes one group of parallel connection electricity
Appearance, the 15th resistance R15, the 16th resistance R16, the 8th electric capacity C8 and the first transformator T1, described
One group of described first transformator T1 it is connected to after one group of shunt capacitance is in parallel with described 15th resistance R15
One end of the primary coil of Same Name of Ends, the primary coil of another group Same Name of Ends of described first transformator T1
Other end ground connection, one end of the secondary coil of one group of Same Name of Ends of described first transformator T1 connects described the
16 resistance R16 are for exporting described transmitting signal, and another of described first transformator T1 organizes Same Name of Ends
The other end of secondary coil by described 8th electric capacity C8 ground connection.
In the 6th kind of possible implementation of first aspect, described current measurement module includes the second change
Depressor T2, the 17th resistance R17, the 18th resistance R18, the 19th resistance R19, the 9th electric capacity C9
With the 4th integrated transporting discharging U4, one end of the primary coil of one group of Same Name of Ends of described second transformator T2 is used
In connecing shielding line, the other end of the primary coil of another group Same Name of Ends of described second transformator T2 is used for connecing
Electrode, the other end of the primary coil of another group Same Name of Ends of described second transformator T2 is also connected with the 9th electricity
Hold C9 and connect shielding line, one group of Same Name of Ends of described second transformator T2 for by the 9th electric capacity C9
One end of secondary coil homophase of meeting described 4th integrated transporting discharging U4 by described 19th resistance R19 defeated
Entering end, the other end of the secondary coil of another group Same Name of Ends of described second transformator T2 is by the described tenth
Seven resistance R17 connect the inverting input of described 4th integrated transporting discharging U4, described 4th integrated transporting discharging U4's
Inverting input connects the outfan of described 4th integrated transporting discharging U4, institute by described 18th resistance R18
State the outfan of the 4th integrated transporting discharging U4 for exporting the current data of measurement.
In the 7th kind of possible implementation of first aspect, described voltage measurement module includes the 20th
Resistance R20, the 21st resistance R21, the 22nd resistance R22 and the 5th integrated transporting discharging U5, described
The reverse input end of the 5th integrated transporting discharging U5 connects described 20th resistance R20, described 5th integrated transporting discharging
The reverse input end of U5 is connected to described 5th integrated transporting discharging U5's by described 22nd resistance R22
Outfan, the in-phase input end of described 5th integrated transporting discharging U5 passes through described 21st resistance R21 ground connection,
The outfan of described 5th integrated transporting discharging U5 is for exporting the voltage data of measurement.
Second aspect present invention provides a kind of micro-resisitivity image device, it may include: at least one
Individual pole plate, each pole plate has DSP, digital to analog converter, two emission electrodes and two noted earlier
The radiating circuit of micro-resisitivity image device, the described boost module of each radiating circuit divides
Not being connected with an emission electrode, described DSP is for generating two frequency numerals identical, opposite polarity
Ac-excited signal, and two the ac-excited signals of numeral generated are transferred to described digital to analog converter,
Described digital to analog converter is used for said two Digital AC pumping signal is converted into two analogue signals, and
Two analogue signals are transferred to respectively the transmitting electricity of said two micro-resisitivity image device
Road, described radiating circuit is sent out by the emission electrode output being connected with the boost module 104 of this radiating circuit
Penetrate signal.
In the first possible implementation of second aspect, described each pole plate also includes single-chip microcomputer,
The radiating circuit of described micro-resisitivity image device be additionally operable to the current data of described measurement and
The voltage data measured is sent to described DSP, described DSP and is additionally operable to be scanned into from described microresistivity
The described current data and the described voltage data that receive as the radiating circuit of well logging apparatus are sent to described list
Sheet machine, described single-chip microcomputer is used for exporting described current data and voltage data to carry out showing and/or analyzing.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
In the embodiment of the present invention, by setting gradually filter module, power amplifier module and liter pressing mold
Block, the radiating circuit of this micro-resisitivity image device can be according to the ac-excited signal received
Export sufficiently large transmitting signal, transmitting signal can be made through the mud formed electrode and the borehole wall
Insulating barrier or mud cake and enter in stratum, such that it is able to using oil-base mud or the situation of synthesis base mud
Under carry out micro resistor.Meanwhile, the radiating circuit of this micro-resisitivity image device
Electric current and the voltage swing launching signal can also be detected, in order to by the current data detected and voltage number
According to sending ground processing system to, show and analyze the transmitting signal of radiating circuit.
Accompanying drawing explanation
Fig. 1 is the embodiment 1 of the radiating circuit of micro-resisitivity image device in the embodiment of the present invention
Schematic diagram；
Fig. 2 is the embodiment 2 of the radiating circuit of micro-resisitivity image device in the embodiment of the present invention
Schematic diagram；
Fig. 3 is that an enforcement of a kind of micro-resisitivity image device in the embodiment of the present invention illustrates
It is intended to.
Detailed description of the invention
Embodiments provide the radiating circuit of a kind of micro-resisitivity image device and micro-electricity
Resistance rate scanning imagery well logging apparatus, using the teaching of the invention it is possible to provide bigger transmitting signal, and transmitting letter can be monitored in real time
Number electric current and voltage swing, be suitable for oil-base mud and synthesis base mud in carry out microresistivity scanning
Imaging.
In order to make those skilled in the art be more fully understood that the present invention program, real below in conjunction with the present invention
Execute the accompanying drawing in example, the technical scheme in the embodiment of the present invention be clearly and completely described, it is clear that
Described embodiment is only the embodiment of a present invention part rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, all should belong to the scope of protection of the invention.
Fig. 1 is the embodiment 1 of the radiating circuit of micro-resisitivity image device in the embodiment of the present invention
Schematic diagram.Refering to Fig. 1, in the embodiment of the present invention, the radiating circuit of micro-resisitivity image device can
To include: filter module 100, power amplifier module 103, boost module 104, current measurement mould
Block 105 and voltage measurement module 106, described filter module 100, power amplifier module 103, liter
Die block 104 and current measurement module 105 are sequentially connected in series, described voltage measurement module 106 and institute
Stating current measurement module 105 to be connected in parallel, described filter module 100 is used for receiving ac signal also
Being filtered described ac signal, described power amplifier module 103 is for filtered exchange
The signal of telecommunication is amplified, described boost module 104 for the ac signal after amplifying is boosted with
Generating and signal is launched in output, it is big that described current measurement module 105 is used for the electric current to described transmitting signal
The little current data measuring and exporting measurement, described voltage measurement module 106 is for described transmitting
The voltage swing of signal measures and exports the voltage data of measurement.
Wherein, described filter module 100 is used for from external reception ac signal, this ac signal
As the pumping signal of this radiating circuit, this pumping signal is filtered by described filter module 100,
And by filtered pumping signal input power amplifier module 103.
Described power amplifier module 103 is for being amplified filtered ac signal, and will put
Ac signal after great is input to boost module 104.
Ac signal is boosted by described boost module 104, and is made by the ac signal after boosting
For emission current signal launch, thus launch signal can be such as by the electricity being connected with boost module 104
Pole is launched and in the mud column that enters in oil well and stratum.
Described current measurement module 105 is for measuring the size of current launching signal the electric current exporting measurement
Data, in order to show and analyze the transmitting signal of radiating circuit subsequently through ground processing system
Size of current.
Described voltage measurement module 106 is for measuring the voltage swing launching signal the voltage exporting measurement
Data, in order to show and analyze the transmitting signal of radiating circuit subsequently through ground processing system
Voltage swing.
In the present embodiment, by setting gradually filter module 100, power amplifier module 103 and boosting
Module 104, this radiating circuit can export bigger transmitting signal according to the ac-excited signal received,
Transmitting signal can be made to enter in oil well through the mud insulating barrier formed electrode and the borehole wall or mud cake
Mud column and stratum in, such that it is able to use oil-base mud or synthesis base mud in the case of carry out micro-
Resistivity scanning imagery.Meanwhile, the radiating circuit of this micro-resisitivity image device can also be examined
Survey electric current and the voltage swing launching signal, in order to the current data detected and voltage data are sent to
Ground processing system, shows and analyzes the transmitting signal of radiating circuit.
Fig. 2 is the embodiment 2 of the radiating circuit of micro-resisitivity image device in the embodiment of the present invention
Schematic diagram.The one that this embodiment 2 is considered as on the basis of embodiment 1 implements.
Refering to Fig. 2, in the present embodiment, described filter module 100 can include the first filter circuit and
Two filter circuits, described first filter circuit is connected with described second filter circuit.By using two-stage to filter
Wave circuit, can preferably filter the interference in pumping signal, the ac signal of output smoothing.
Preferably, described first filter circuit can include the first resistance R1, the second resistance R2, the 3rd electricity
Resistance R3, the 4th resistance R4, the first electric capacity C1, the second electric capacity C2 and the first integrated transporting discharging U1, described
First resistance R1 and the second resistance R2 is connected in series to the in-phase input end of described first integrated transporting discharging U1,
One end of described first electric capacity C1 is connected between described first resistance R1 and the second resistance R2, described
The other end of the first electric capacity C1 is connected to described first integrated transporting discharging U1's by described 3rd resistance R3
Inverting input, the reverse input end of described first integrated transporting discharging U1 is connected by described 3rd resistance R3
To the outfan of described first integrated transporting discharging U1, the inverting input of described first integrated transporting discharging U1 passes through
Described 4th resistance R4 ground connection, the in-phase input end of described first integrated transporting discharging U1 is by described second electricity
Hold C2 ground connection.
Wherein, outside alternating current pumping signal enters the first resistance R1 of this first filter circuit, passes through
After this first filter circuit is filtered, after the outfan of the first integrated transporting discharging U1 exports filtering for the first time
Ac signal.
Preferably, described second filter circuit can include the 5th resistance R5, the 6th resistance R6, the 7th electricity
Resistance R7, the 3rd electric capacity C3, the 4th electric capacity C4 and the second integrated transporting discharging U2, described 5th resistance R5 with
6th resistance R6 is connected in series to the in-phase input end of described second integrated transporting discharging U2, described 3rd electric capacity
One end of C3 is connected between described 5th resistance R5 and the 6th resistance R6, described 3rd electric capacity C3's
The other end is connected to the inverting input of described second integrated transporting discharging U2, institute by described 7th resistance R7
State the reverse input end of the second integrated transporting discharging U2 and be connected to by described 7th resistance R7 described second integrated
The outfan of amplifier U2, the in-phase input end of described second integrated transporting discharging U2 passes through described 4th electric capacity C4
Ground connection.
Wherein, the alternating current pumping signal from the first filter circuit output enters the of this second filter circuit
One resistance R5, after this second filter circuit is filtered, from the outfan of the second integrated transporting discharging U2
The output filtered ac signal of second time.
It is appreciated that above-mentioned filter module 100 uses the form of secondary filter circuit to be merely exemplary
, rather than limiting the present invention, those skilled in the art can also use one-level according to actual needs
Filter circuit or the filter circuit more than two grades.
Preferably, described power amplifier module 103 can include the 8th resistance R8, the 9th resistance R9,
Tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 14th
Resistance R14, the 5th electric capacity C5, the first audion Q1, the second audion Q2 and the 3rd integrated transporting discharging
U3, described 5th electric capacity C5 are connected to the in-phase input end of described 3rd integrated transporting discharging U3, and the described 3rd
The inverting input of integrated transporting discharging U3 passes through described 8th resistance R8 ground connection, described 3rd integrated transporting discharging U3
Inverting input be connected to the outfan of described 3rd integrated transporting discharging U3 by described 9th resistance R9,
The positive power source terminal of described 3rd integrated transporting discharging U3 connects positive source by described 11st resistance R11, described
The negative power end of the 3rd integrated transporting discharging U3 connects power cathode by described tenth resistance R10, and the described 1st
The base stage of pole pipe Q1 connects the positive power source terminal of described 3rd integrated transporting discharging U3, described second audion Q2
Base stage connect described 3rd integrated transporting discharging U3 negative power end, the colelctor electrode of described first audion Q1
Being connected with the colelctor electrode of described second audion Q2, the emitter stage of described first audion Q1 passes through the tenth
Two resistance R12 connect positive source, and the emitter stage of described second audion Q2 passes through described 13rd resistance
R13 connects power cathode, and the outfan of described 3rd integrated transporting discharging U3 connects described 14th resistance R14
One end, the other end of described 14th resistance R14 be connected to the colelctor electrode of described first audion Q1 with
Between the colelctor electrode of the second audion Q2.It is further preferred that as in figure 2 it is shown, described power cathode can
With by a capacity earth, described positive source can also pass through a capacity earth, for elimination
Noise.
Wherein, the filtered pumping signal from filter module 100 output enters this power amplifier mould
5th electric capacity C5 of block 103, after carrying out power amplification via this power amplifier module 103, will exchange
The signal of telecommunication is exported by the 14th resistance R14 from the outfan of the 3rd integrated transporting discharging U3.
Preferably, described boost module 104 can include one group of shunt capacitance, the 15th resistance R15,
16th resistance R16, the 8th electric capacity C8 and the first transformator T1, described one group of shunt capacitance is with described
The primary coil of one group of Same Name of Ends of described first transformator T1 it is connected to after 15th resistance R15 parallel connection
One end, the other end ground connection of primary coil of another group Same Name of Ends of described first transformator T1, described the
One end of the secondary coil of one group of Same Name of Ends of one transformator T1 connect described 16th resistance R16 for
Export described transmitting signal, the other end of the secondary coil of another group Same Name of Ends of described first transformator T1
By described 8th electric capacity C8 ground connection.
Wherein, the ac signal from power amplifier module 103 output enters this boost module 104
One group of shunt capacitance and the 15th resistance R15, entered by this group of shunt capacitance and the 15th resistance R15
Enter the primary coil of the first transformator T1, after being boosted by the first transformator T1, from the first transformation
The secondary coil of device T1 launches signal by the 16th resistance R16 output.Preferably, it is also possible to by this liter
The output termination shielding line of die block 104, shielding layer grounding, such that it is able to lead to external interference signal
Cross shielding line and import the earth.Described one group of shunt capacitance is preferably and uses six electric capacity parallel connections, certainly, also
One group of shunt capacitance more or less than six electric capacity can be used as required.
Preferably, described current measurement module 105 include the second transformator T2, the 17th resistance R17,
18th resistance R18, the 19th resistance R19, the 9th electric capacity C9 and the 4th integrated transporting discharging U4, described
One end of the primary coil of one group of Same Name of Ends of the second transformator T2 is used for connecing shielding line and (is commonly attached to screen
Cover the screen layer of line), the other end of the primary coil of another group Same Name of Ends of described second transformator T2 is used
In (such as by shielding core) receiving electrode, the primary line of another group Same Name of Ends of described second transformator T2
The other end of circle is also connected with the 9th electric capacity C9 and (typically connects for connecing shielding line by the 9th electric capacity C9
Screen layer to shielding line), one end of the secondary coil of one group of Same Name of Ends of described second transformator T2 leads to
Cross described 19th resistance R19 and connect the in-phase input end of described 4th integrated transporting discharging U4, described second transformation
The other end of the secondary coil of another group Same Name of Ends of device T2 connects described the by described 17th resistance R17
The inverting input of four integrated transporting discharging U4, the inverting input of described 4th integrated transporting discharging U4 is by described
18th resistance R18 connects the outfan of described 4th integrated transporting discharging U4, described 4th integrated transporting discharging U4
Outfan for exporting the current data of measurement.It is further preferred that described 4th integrated transporting discharging U4
Positive supply termination positive source, positive source can pass through a capacity earth, described 4th integrated transporting discharging
The negative supply termination power cathode of U4, described positive source can also pass through a capacity earth, by electricity
Appearance can filter off noise.The other end of the primary coil of another group Same Name of Ends of described second transformator T2 is also
A resistance eutral grounding can be passed through.
Wherein, can be by the primary line of the second transformator T2 from the signal of launching of boost module 104 output
Arrive electrode after circle, then go out from electrode emission and enter in oil well mud column and stratum, can adopt
With the radiating circuit of two tranmitting frequency transmitting signals identical, opposite polarity with the use of, by simultaneously
To stratum, signal is launched in tranmitting frequency exchange identical, opposite polarity so that exchange launches signal at two
Constitute loop between radiating circuit and stratum, by measuring the current signal in stratum and electric current can be believed
Number it is analyzed process to obtain log picture.One end of the primary coil of the second transformator T2 can also lead to
Cross the 9th electric capacity C9 and connect the screen layer of shielding line, lead to for by the interference signal launched in signal of output
The screen layer crossing shielding line imports the earth.
Meanwhile, the alternating current of the secondary coil output of the second transformator T2 is by after the 4th integrated transporting discharging U4
The current data that output is measured, this current data launches the size of current of signal for representing.Can will be somebody's turn to do
The current data measured is transferred to ground processing system, thus processing system can show and analyze
The size of current launching signal on radio road.
Preferably, described voltage measurement module 106 can include the 20th resistance R20, the 21st electricity
Resistance R21, the 22nd resistance R22 and the 5th integrated transporting discharging U5, described 5th integrated transporting discharging U5's is anti-
Connecting described 20th resistance R20 to input, the reverse input end of described 5th integrated transporting discharging U5 passes through
Described 22nd resistance R22 is connected to the outfan of described 5th integrated transporting discharging U5, described 5th integrated
The in-phase input end of amplifier U5 passes through described 21st resistance R21 ground connection, described 5th integrated transporting discharging
The outfan of U5 is for exporting the voltage data of measurement.It is further preferred that as in figure 2 it is shown, described
The in-phase input end of five integrated transporting discharging U5 can also carry out ground connection by an electric capacity, for filtering off noise.
Wherein, this voltage measurement module 106 can be entered from the transmitting signal of boost module 104 output
20th resistance R20, and the voltage data measured, this electricity is exported from the outfan of the 5th integrated transporting discharging U5
Pressure data are for representing the voltage swing launching signal.The voltage data of this measurement can be transferred to ground
On processing system, thus processing system can show and analyze radiating circuit launch signal electric current big
Little.
The specific implementation of the radiating circuit of this embodiment micro-resisitivity image device, first leads to
Cross multi-stage filter circuit the pumping signal of input is filtered effectively, then pass through power amplifier module
103 pairs of signals carry out power amplification, and AC signal enters back into boost module 104, generate voltage and current all
Sufficiently large transmitting signal, the signal of launching of generation can be exhausted through the mud formed electrode and the borehole wall
Edge layer or mud cake and enter in stratum, and then can be in the case of using oil-base mud or synthesis base mud
Carry out micro resistor.In this embodiment the specific implementation of radiating circuit by wave filter,
At earth terminal, electric capacity and the mode at the external shielding line of radiating circuit outfan are set, can be effectively
Remove interference signal, consequently facilitating accurately obtain log picture, be better achieved in oil-base mud and conjunction
Become imaging in base mud.On the other hand, the specific implementation small volume of this radiating circuit, it is simple to collection
Become on the pole plate of micro-resisitivity image device, easy to process, low cost.
Above the radiating circuit for micro-resistance scan in the embodiment of the present invention is described, below
Micro-resisitivity image device in the embodiment of the present invention is described.
Present invention also offers a kind of micro-resisitivity image device.Refering to Fig. 3, the present invention implements
In example, a kind of micro-resisitivity image device may include that at least one pole plate, on each pole plate
There are DSP, digital to analog converter (DAC), two emission electrodes and two foregoing microresistivities sweep
Retouch the radiating circuit of imaging logging device, the described boost module 104 of each radiating circuit respectively with one
Emission electrode is connected, and described DSP is for generating two frequency Digital AC identical, opposite polarity excitations
Signal, and two the ac-excited signals of numeral generated are transferred to described digital to analog converter, described digital-to-analogue
Transducer is used for being converted into said two Digital AC pumping signal two analogue signals, and by two moulds
Intend signal and be transferred to the radiating circuit of said two micro-resisitivity image device respectively, described
Signal is launched by the emission electrode output being connected with the boost module 104 of this radiating circuit in radio road.
Wherein, micro-resisitivity image device can include circuit and at least one pole plate, described
At least one pole plate may be mounted on probe, is goed deep under oil well by probe during well logging, and by probe
Pole plate is attached on the borehole wall.There are on each pole plate two emission electrodes and two foregoing microresistivities
The radiating circuit of scanning imagery well logging apparatus, the described boost module 104 of each radiating circuit is respectively with one
Individual emission electrode is connected, and swashs by controlling DSP two frequency Digital AC identical, opposite polarity of generation
Encourage signal (such as two frequency digital sine pumping signals identical, opposite polarity), two numerals are handed over
After stream pumping signal carries out digital-to-analogue conversion, it is converted into two analogue signals, then two analogue signals is divided
Not being input to two radiating circuits, two radiating circuits can generate two according to said two analogue signal
Frequency transmitting signal identical, opposite polarity, it is defeated by two emission electrodes respectively that the two launches signal
Go out to the borehole wall, the exchange identical, opposite polarity of two frequencies launch signal can two radiating circuits with
Loop is constituted between stratum, and then, can be by measuring the current signal in stratum, for obtaining log
As providing relevant parameter.
Preferably, it is characterised in that described each pole plate also includes single-chip microcomputer, described microresistivity scans
The radiating circuit of imaging logging device is additionally operable to send out the current data of described measurement and the voltage data of measurement
Deliver to described DSP, described DSP be additionally operable to the transmitting from described micro-resisitivity image device
Described current data and described voltage data that circuit receives are sent to described single-chip microcomputer, described single-chip microcomputer
For exporting described current data and voltage data to carry out showing and/or analyzing.
Wherein, single-chip microcomputer, such as can be launched for sending operational order to DSP as main control chip
Enabled instruction, transmitting halt instruction etc., described DSP is carried out according to the operational order of described single-chip microcomputer accordingly
Operation, such as, when the transmitter trigger receiving single-chip microcomputer instructs, begin to generate that two frequencies are identical, pole
The Digital AC pumping signal that property is contrary.Described DSP is additionally operable to described current data and institute by circuit
Stating the processing system that voltage data is transferred to rest on the ground, processing system can show and/or analyze described
Current data and voltage data, thus can with staff on the ground monitor launch signal electric current and
Voltage swing.
At least one pole plate described such as can use six pole plates, to adopt in micro resistor
Collection is to more resistivity, it is thus achieved that preferably log picture, such that it is able to be preferably analyzed processing.
It is appreciated that those skilled in the art can use as required more or less than six pole plates.
In the embodiment of the present invention, this micro-resisitivity image device generates two by controlling DSP
Frequency Digital AC pumping signal identical, opposite polarity is then enough by radiating circuit output electric current
Signal is launched in big exchange, and signal is launched in the exchange of transmitting can be through the mud formed electrode and the borehole wall
Starch insulating barrier or mud cake and enter in stratum, and constitute loops between radiating circuit and stratum at two, from
And transmitting signal can be made to carry out microresistivity scanning in the case of using oil-base mud or synthesis base mud
Imaging.Meanwhile, the radiating circuit of this micro-resisitivity image device can also detect transmitting signal
Electric current and voltage swing, in order to send the current data detected and voltage data to ground place
Reason system, shows and analyzes the transmitting signal of radiating circuit.
Term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second ", "
Three " " the 4th " etc. is for distinguishing similar object, without being used for describing specific order or successively time
Sequence.Should be appreciated that the data of so use can be exchanged in the appropriate case, in order to enforcement described herein
Example can be implemented with the order in addition to the content except here illustrating or describe.Additionally, term " includes "
" have " and their any deformation, it is intended that cover non-exclusive comprising, such as, comprise
The process of series of steps or unit, method, system, product or equipment are not necessarily limited to clearly to list
Those steps or unit, but can include the most clearly listing or for these processes, method,
Product or intrinsic other step of equipment or unit.
The above, above example only in order to technical scheme to be described, is not intended to limit；
Although being described in detail the present invention with reference to previous embodiment, those of ordinary skill in the art should
Work as understanding: the technical scheme described in foregoing embodiments still can be modified by it, or to it
Middle part technical characteristic carries out equivalent；And these amendments or replacement, do not make appropriate technical solution
Essence depart from various embodiments of the present invention technical scheme spirit and scope.
Claims (8)
1. the radiating circuit of a micro-resisitivity image device, it is characterised in that including: filter
Ripple device 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 sequentially connected in series, described voltage measurement module
(106) being connected in parallel with described current measurement module (105), described filter module (100) is used for
Receive ac signal and described ac signal be filtered, described power amplifier module (103)
For being amplified filtered ac signal, described boost module (104) is after to amplifying
Ac signal carries out boosting to generate and output transmitting signal, and described current measurement module (105) is used for
Size of current to described transmitting signal measures and exports the current data of measurement, described voltage measurement
Module (106) is for measuring to the voltage swing of described transmitting signal and export the voltage data of measurement；
Wherein, described filter module (100) includes the first filter circuit (101) and the second filtered electrical
Road (102), described first filter circuit (101) is connected with described second filter circuit (102)；
Described first filter circuit (101) include the first resistance R1, the second resistance R2, the 3rd resistance R3,
4th resistance R4, the first electric capacity C1, the second electric capacity C2 and the first integrated transporting discharging U1, described first electricity
Resistance R1 and the second resistance R2 is connected in series to the in-phase input end of described first integrated transporting discharging U1, described
One end of first electric capacity C1 is connected between described first resistance R1 and the second resistance R2, and described first
The other end of electric capacity C1 is connected to the anti-phase of described first integrated transporting discharging U1 by described 3rd resistance R3
Input, the reverse input end of described first integrated transporting discharging U1 is connected to institute by described 3rd resistance R3
Stating the outfan of the first integrated transporting discharging U1, the inverting input of described first integrated transporting discharging U1 is by described
4th resistance R4 ground connection, the in-phase input end of described first integrated transporting discharging U1 passes through described second electric capacity C2
Ground connection.
Radiating circuit the most according to claim 1, it is characterised in that described second filter circuit (102)
Including the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 3rd electric capacity C3, the 4th electric capacity C4
It is connected in series to described second collection with the second integrated transporting discharging U2, described 5th resistance R5 and the 6th resistance R6
Becoming the in-phase input end of amplifier U2, one end of described 3rd electric capacity C3 is connected to described 5th resistance R5
And between the 6th resistance R6, the other end of described 3rd electric capacity C3 is connected by described 7th resistance R7
To the inverting input of described second integrated transporting discharging U2, the reverse input end of the second integrated transporting discharging U2 passes through
Described 7th resistance R7 is connected to the outfan of described second integrated transporting discharging U2, described second integrated transporting discharging
The in-phase input end of U2 passes through described 4th electric capacity C4 ground connection.
Radiating circuit the most according to claim 2, it is characterised in that described power amplifier module
(103) include the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11,
12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, the 5th electric capacity C5, the one or three
Pole pipe Q1, the second audion Q2 and the 3rd integrated transporting discharging U3, described 5th electric capacity C5 is connected to described
The in-phase input end of the 3rd integrated transporting discharging U3, the inverting input of described 3rd integrated transporting discharging U3 passes through institute
Stating the 8th resistance R8 ground connection, the inverting input of described 3rd integrated transporting discharging U3 passes through described 9th resistance
R9 is connected to the outfan of described 3rd integrated transporting discharging U3, the positive power source terminal of described 3rd integrated transporting discharging U3
Connecing positive source by described 11st resistance R11, the negative power end of described 3rd integrated transporting discharging U3 passes through
Described tenth resistance R10 connects power cathode, and the base stage of described first audion Q1 connects described 3rd integrated
The positive power source terminal of amplifier U3, the base stage of described second audion Q2 connects described 3rd integrated transporting discharging U3
Negative power end, the colelctor electrode of the colelctor electrode of described first audion Q1 and described second audion Q2 is even
Connecing, the emitter stage of described first audion Q1 connects positive source by the 12nd resistance R12, and described second
The emitter stage of audion Q2 connects power cathode, described 3rd integrated transporting discharging by described 13rd resistance R13
The outfan of U3 connects one end of described 14th resistance R14, the other end of described 14th resistance R14
It is connected between colelctor electrode and the colelctor electrode of the second audion Q2 of described first audion Q1.
Radiating circuit the most according to claim 3, it is characterised in that described boost module (104)
Including one group of shunt capacitance, the 15th resistance R15, the 16th resistance R16, the 8th electric capacity C8 and first
Transformator T1, is connected to described first after described one group of shunt capacitance is in parallel with described 15th resistance R15
One end of the primary coil of one group of Same Name of Ends of transformator T1, another group of described first transformator T1 is same
The other end ground connection of the primary coil of name end, the secondary coil of one group of Same Name of Ends of described first transformator T1
One end connect described 16th resistance R16 for export described transmitting signal, described first transformator
The other end of the secondary coil of another group Same Name of Ends of T1 is by described 8th electric capacity C8 ground connection.
Radiating circuit the most according to claim 4, it is characterised in that described current measurement module (105)
Including the second transformator T2, the 17th resistance R17, the 18th resistance R18, the 19th resistance R19,
9th electric capacity C9 and the 4th integrated transporting discharging U4, the primary line of one group of Same Name of Ends of described second transformator T2
One end of circle is used for connecing shielding line, primary coil another of another group Same Name of Ends of described second transformator T2
One end is used for receiving electrode, and the other end of the primary coil of another group Same Name of Ends of described second transformator T2 is also
Connect the 9th electric capacity C9 and connect shielding line for by the 9th electric capacity C9, described second transformator T2's
One end of the secondary coil of one group of Same Name of Ends connects described 4th integrated transporting discharging by described 19th resistance R19
The in-phase input end of U4, the other end of the secondary coil of another group Same Name of Ends of described second transformator T2
The inverting input of described 4th integrated transporting discharging U4, described 4th collection is connect by described 17th resistance R17
The inverting input becoming amplifier U4 connects described 4th integrated transporting discharging U4 by described 18th resistance R18
Outfan, the outfan of described 4th integrated transporting discharging U4 is for exporting the current data of measurement.
6. according to the radiating circuit described in any one of claim 1-5, it is characterised in that described voltage is surveyed
Amount module (106) includes the 20th resistance R20, the 21st resistance R21, the 22nd resistance R22
Described 20th electricity is connected with the reverse input end of the 5th integrated transporting discharging U5, described 5th integrated transporting discharging U5
Resistance R20, the reverse input end of described 5th integrated transporting discharging U5 is connected by described 22nd resistance R22
To the outfan of described 5th integrated transporting discharging U5, the in-phase input end of described 5th integrated transporting discharging U5 passes through
Described 21st resistance R21 ground connection, the outfan of described 5th integrated transporting discharging U5 is for exporting measurement
Voltage data.
7. a micro-resisitivity image device, it is characterised in that this micro resistor
Well logging apparatus includes at least one pole plate, and each pole plate has DSP, digital to analog converter, two transmittings
Electrode and two are according to the micro-resisitivity image device according to any one of claim 1-5
Radiating circuit, the described boost module (104) of each radiating circuit is connected with an emission electrode respectively,
Described DSP is for generating two frequency Digital AC pumping signals identical, opposite polarity, and will generate
Two ac-excited signals of numeral be transferred to described digital to analog converter, described digital to analog converter is for by institute
State two ac-excited signals of numeral and be converted into two analogue signals, and two analogue signals are transmitted respectively
To the radiating circuit of said two micro-resisitivity image device, described radiating circuit by with this
Signal is launched in the emission electrode output that the boost module (104) of radiating circuit connects.
Micro-resisitivity image device the most according to claim 7, it is characterised in that institute
State each pole plate and also include that single-chip microcomputer, the radiating circuit of described micro-resisitivity image device are also used
Also use in the current data of described measurement and the voltage data of measurement are sent to described DSP, described DSP
In the described current data that the radiating circuit from described micro-resisitivity image device is received and
Described voltage data is sent to described single-chip microcomputer, and described single-chip microcomputer is used for exporting described current data and voltage
Data are to carry out showing and/or analyzing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410344449.XA CN104074515B (en) | 2014-07-18 | Micro-resisitivity image device and radiating circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410344449.XA CN104074515B (en) | 2014-07-18 | Micro-resisitivity image device and radiating circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104074515A CN104074515A (en) | 2014-10-01 |
| CN104074515B true CN104074515B (en) | 2017-01-04 |
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