CN106405652B - A kind of exception well head τ value disposal plant - Google Patents
A kind of exception well head τ value disposal plant Download PDFInfo
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- CN106405652B CN106405652B CN201610719545.7A CN201610719545A CN106405652B CN 106405652 B CN106405652 B CN 106405652B CN 201610719545 A CN201610719545 A CN 201610719545A CN 106405652 B CN106405652 B CN 106405652B
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- controlled door
- magnetic latching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
- G01V1/46—Data acquisition
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
- G01V1/48—Processing data
Abstract
A kind of exception well head τ value disposal plant, it includes UH signal amplifier, when base selector, electric controlled door magnetic latching relay, modulator, radio station and antenna, UH signal amplifier is for receiving focus vibration signal, its signal output end is connected with the data signal input of electric controlled door magnetic latching relay, when base selector signal input part be connected with the output end of time base circuit, for being selected into line timebase, its signal output end is connected with the control signal input of electric controlled door magnetic latching relay, electric controlled door magnetic latching relay according to when base selector issue open gate control signal, select the state of electronically controlled door, the output of electric controlled door magnetic latching relay connects radio station by modulator.The present invention can exclude certain interference before true UH well head road signal reaches, and reduce, reduce useless, substandard products the probability generated because hole top signal τ value is abnormal, improve field production efficiency and economic benefit.
Description
Technical field
The present invention relates to petroleum exploration fields, are the disposal plants of UH well head road signal τ value.
Background technique
In seismic prospecting construction, UH well head road signal is the indispensable important information of seismic prospecting.So-called UH well head
Road signal just refers to that the seismic wave excited after focus detonation reaches the time value for being embedded in the wave detector of well head, that is, well
First take-off vibration that mouth wave detector receives, in seismic prospecting, this is exactly as signal of interest, one of main function
The depth of monitoring excitation well (actually referring to that focus drills, similarly hereinafter), and improve the important of imaging of seismic data effect static correction
Parameter, as shown in Figure 1.
In Fig. 1, O is detonation focus, and D is well head, and UH is uphole geophone, and A is the depth of well, and B arrives for uphole geophone
The distance of well head, C is distance of the detonation focus to uphole geophone, according to Pythagorean theorem:V is wave speed of the earthquake
Degree, it follows that time value τ=C/V of well head.Usually earth's surface changes little situation within the scope of some Seismic Operation work area
Under, surface layer direct wave velocity variations are little, and the distance of uphole geophone to well head is also to be basically unchanged, the depth of excitation well
It is basically unchanged, therefore under normal conditions, UH well head road signal τ value is also to be held essentially constant, at most also only one
Fluctuation in a minimum range.And when UH well head road signal τ value is less than normal value, it is generally the case that then indicate excitation well
Depth is inadequate, and such earthquake record is exactly secondary, waste product.According to the relevant regulations of seismic prospecting industry, defective product record must be weighed
New big gun of mending resurveys, and substandard products record is more than that also must mend again big gun after certain quantity to resurvey.Again big gun is mended to adopt again
Collect the field work of seismic data, time-consuming, bothersome, production efficiency and economic benefit substantially reduce.
2, the current status of UH well head road signal τ value
Current status is, in seismic prospecting field work, the probability of UH well head road signal τ value exception or relatively high
, or even reached 30% or so in certain work areas.It is provided according to seismic prospecting specification, the note of UH well head road signal τ value exception
Recording in continuous 4 is substandard products, is then waste product from the 5th.It not only directly influences the quality of earthquake record, also directly affects
To the efficiency of production, because once there is defective product record, then it must mend again big gun and resurvey seismic data.In seismic prospecting open country
In outer operation, big gun time-consuming bothersome, this needs that resurvey seismic data are mended again: boring focus hole again, focus descend to fry again
Medicine, construction survey line cannot be rolled normally.Therefore, seek to ensure that the UH well head road normal method of signal τ value never stopped.
Certainly, cause the factor of UH well head road signal τ value exception really also very much, actual conditions are also very complicated, solve the problems, such as this difficulty
Degree is big.
By taking certain seismic prospecting operation area as an example, the record proportion of UH well head road signal τ value exception is larger, and there are about 30%
Left and right.Its abnormal phenomenon is: UH well head road signal τ value is less than normal.The well depth in the work area is 26 meters, the through velocity of wave of surface layer here
Degree is about 1500 meter per seconds.Therefore according to theoretical calculation it is found that normal UH well head road signal τ value should be 18ms or so.And it is abnormal
UH well head road signal τ value be only several ms, cause a large amount of substandard products, defective product record.As previously mentioned, defective product record must mend again
Big gun production resurveys seismic data, and substandard products record, which reaches, must also mend big gun production after certain amount again and resurvey earthquake number
According to.It is time-consuming, bothersome, expensive.Conservative estimation under normal conditions, at least 5000 yuan of the expense of one physical points of seismic prospecting with
On, it is more bad, once mending big gun production again, just interrupted normal field work, redrilling, play again explosive,
Seismic survey lines are redefined, explodes, resurvey and record seismic data again.And resurvey ground mending big gun production again
During shaking data, seismic survey lines cannot be rolled normally, greatly reduce the production efficiency of field acquisition seismic data.And for gathering around
For the field production operation troop for having hundreds of people, tens of trolleys, tens million of first seismic prospecting equipments, Time is money
Really really true.
3, the reason of UH well head road signal τ value exception is caused to be analyzed
During field work, various vibration interference sources, such as strong wind, animal, vehicle to run, mechanical oscillation, at any time
In the presence of once these vibration interferences appear in front of uphole geophone receives true detonation shock, blaster is just takeed for
True detonation shock signal is received, so in this case, UH well head road signal τ value is just advanced by, and time value is inclined
It is small, about several ms, to produce a large amount of useless, substandard products, as shown in Figure 6.
Summary of the invention
The purpose of the present invention is the problems extremely less than normal for well head road signal τ value in seismic prospecting field work, propose
It is a kind of to reduce, reduce well head road signal τ value disposal plant extremely less than normal.The present invention is according to the practical feelings of seismic prospecting operation area
Suitable time threshold value is arranged in condition, to exclude certain interference before true UH well head road signal reaches, reduces, reduces
Useless, substandard products the probability generated because hole top signal τ value is abnormal, improves field production efficiency and economic benefit.
The technical scheme is that
A kind of exception well head τ value disposal plant, it include UH signal amplifier, when base selector, the holding of automatically controlled door sensor after
Electric appliance, modulator, radio station and antenna, the UH signal amplifier are connected with the signal output end of uphole geophone, are used for
Focus vibration signal is received, the signal output end of UH signal amplifier and the data-signal of electric controlled door magnetic latching relay input
End is connected, when base selector signal input part be connected with the output end of time base circuit, for into line timebase selection, signal to be defeated
Outlet is connected with the control signal input of electric controlled door magnetic latching relay, electric controlled door magnetic latching relay according to when base selector
What is issued opens gate control signal, selects the state of electronically controlled door, and the output end of electric controlled door magnetic latching relay connects modulator
Signal input part, the signal output end of modulator connects radio station, the coding being sent in system for acquiring seismic data by radio station
Device is demodulated UH hole top signal to send to system for acquiring seismic data and record by encoder.
UH signal amplifier of the invention includes the filter unit being sequentially connected in series, clipping unit, level-one amplifying unit and two
Grade amplifying unit；Aforementioned filter unit, clipping unit, level-one amplifying unit and second level amplifying unit are all made of two-way circuit, filter
Wave unit includes resistor R1, R2 and capacitor C1, C2, and clipping unit includes diode D1-D4, and level-one amplifying unit includes electricity
Hinder device R3-R10, amplifier A1, A2 and capacitor C3-C6, second level amplifying unit include resistor R11-R14, amplifier A3 and
Capacitor C7-C8.
Filter unit of the invention includes resistor R1, R2 and capacitor C1, C2, and the radio-frequency component in signal will be by capacitor
Device C1, C2 switch to ground, and capacitor C1 is connected in parallel with resistor R1, and capacitor C2 is connected in parallel with resistor R2, capacitor
A tie point of C1 and resistor R1 connects the end UH+ of UH uphole geophone, and capacitor C1 is connect with another of resistor R1
Point ground connection；A tie point of capacitor C2 and resistor R2 meets the end UH- of UH uphole geophone, capacitor C2 and resistor R2
Another tie point ground connection.
Clipping unit of the invention includes diode D1-D4, and wherein diode D1, D2 forms positive limiter, diode D1
Positive termination UH uphole geophone the end UH+, the end UH- of the positive termination UH uphole geophone of diode D2；Diode D1, D2's
Negative terminal is connected and connects the positive reference power source of+VE；When the positive range value of signal is no more than the positive reference voltage of+VE, then two pole
Pipe D1, D2 cut-off, signal are then transferred to next stage；And when the positive range value of signal is greater than the positive reference voltage of+VE, then two
The conducting of pole pipe D1, D2, signal are then limited in a certain range value, and diode D3, D4 form negative limiter, the negative terminal of diode D3
The end UH+ of UH uphole geophone is connect, the negative terminal of diode D4 connects the end UH- of UH uphole geophone, the anode phase of diode D3, D4
The negative reference power source of-VE is connected and connects, when the negative range value of signal is no more than the negative reference voltage of-VE, then diode D3, D4
Cut-off, signal are then transferred to next stage；And when the negative range value of signal is lower than the negative reference voltage of-VE, then diode D3,
D4 conducting, signal are then limited in a certain range value；By using slicer, make the amplitude of received hole top signal
Value is limited between the positive reference power source of+VE and the negative reference power source of-VE, to make subsequent first stage amplifier and two-stage amplifier not
As for saturation jamming due to signal is too big.
Level-one amplifying unit of the invention is by operational amplifier A1 and resistor R3-R6 and operational amplifier A2 and electricity
Resistance device R7-R10 forms two-way first stage amplifier, and for amplifying the UH hole top signal for passing through filtering, clipping, operation is put
The end UH+ of another termination UH uphole geophone of negative input end the termination resistor R3, resistor R3 of big device A1, operational amplifier A1
Positive input terminal termination resistor R4, resistor R4 another termination UH uphole geophone the end UH-；Similarly: operational amplifier A2
Negative input end termination resistor R7, resistor R7 another termination UH uphole geophone the end UH-.Operational amplifier A2's is just defeated
Enter termination resistor R8, the end UH+ of another termination UH uphole geophone of resistor R8；
Second level amplifying unit forms two-way two-stage amplifier by operational amplifier A3 and resistor R11-R14, will be through
The UH hole top signal for crossing filtering, clipping and level-one amplification carries out second level amplification, the negative input end termination resistor of operational amplifier A3
Another termination operational amplifier A1 output end of R11, resistor R11.The positive input terminal termination resistor R12 of operational amplifier A3,
Another termination operational amplifier A2 output end of resistor R12, operational amplifier A3 output termination electronically controlled door magnetic keep after
The movable contact K of electric appliance, in this way, by electronics control is transferred to by the UH hole top signal of filtering, clipping, level-one amplification and second level amplification
The movable contact K of door sensor guard relay processed, the movable contact K of the electric controlled door magnetic latching relay of base selector adjustment at that time, which is in, to be connected
When state, signal passes through, and the movable contact K that Ruo Shiji selector adjusts automatically controlled magnetic latching relay is in an off state, then the letter
Number it cannot pass through.
When base selector of the invention includes the when base selection list being made of decade counter Z1, Z3, comparator Z2, Z4
Member, and the driving unit being made of driver Z5, Z6, triode T1 and diode D5, base selecting unit and drive when described
Moving cell is sequentially connected in series, and the output end of driving unit is connected to the coil-end of electronically controlled door magnetic latching relay, and opened point is inhaled
It closing, the movable contact K of control electric controlled door magnetic latching relay is connected, and hole top signal is passed through, wherein；
The input of units decade counter Z1 terminates sprocket pulse, and carry-out terminates tens decade counter
The input terminal of Z3, the output end group 1A0-1A3 for counting pulse connect the corresponding input terminal group of comparator Z2, and the carry of comparator Z2 is defeated
Out terminate tens decimal system comparator Z4 input terminal, another group of input terminal group A0-A3 of comparator select respectively connect high level+
(high level is to choose, for example, A0 ground connection, A1 connects high level, A2 connects high level, A3 ground connection, then its time for 5V or low level ground connection
Value is just 6mS).
The carry output of the input termination units decade counter Z1 of tens decade counter Z3, tens
The carry output of the input termination units comparator Z2 of comparator Z4, comparator Z4 carry-out terminate the defeated of driving unit
Enter end；The output end group 2B0-2B3 of the counting pulse of comparator Z4 connects the corresponding input terminal group of comparator Z4, and comparator Z4's is another
One group of input terminal group B0-B3 is selected respectively connects high level+5V or low level ground connection.(high level be choose, for example, B0 connect high level,
B1 ground connection, B2 ground connection, B3 ground connection, then its time value is just 10mS (because its power is tens).In this way, a position chooses 6, ten
It is 10 to choose 1, total value is exactly 16.Again due to when base be 1mS sprocket pulse, so total time value is exactly 16mS.)
This send after the power drive of driver to the coil-end of electronically controlled door magnetic latching relay, and opened point is attracted,
The movable contact K for controlling the door sensor guard relay is connected, and hole top signal is passed through.It can thus be appreciated that: the UH well in such as certain work area
Mouth road signal τ value should normally be 18mS, and the period before 16mS, door are in an off state, therefore are shut off
Various vibration interferences before 16mS have fundamentally thoroughly prevented the case where UH well head road signal τ value is less than normal value generation,
Ensure that UH well head road signal τ value is normal.It is abnormal to greatly reduce the UH well head road signal τ value because of caused by too small time value
And the secondary, waste product generated, it greatly reduces benefit big gun and resurveys seismic data.Thus production efficiency, economic effect are substantially increased
Benefit.Theoretically, the 2mS such as before selected true UH hole top signal arrives opens the door, then the probability that secondary, waste product generates
Only original 1/9.Certain selected opening time, depending on the concrete condition in each operation work area, i.e., according to the work area
Depending on the depth of well and the speed of the work area surface layer direct wave.The depth of well is deeper, then uphole time τ value is bigger, conversely, if well
Depth it is more shallow, then uphole time τ value is smaller.Similarly, the speed of surface layer direct wave is lower, then uphole time τ value is bigger, instead
It, if the speed of surface layer direct wave is higher, uphole time τ value is smaller.It is recommended that: opening time is selected in true hole top signal
2mS enabling before arrival is advisable.The generation for both having prevented abnormal small UH well head road signal τ value in this way also ensures true
Hole top signal channel it is unblocked.
Z1, Z3 of the invention is counter, and Z2, Z4 are comparator, and Z5, Z6 are driver, and T1 is triode, and D5 is two poles
Pipe, magnetic latching relay are the magnetic latching relay of twin coil winding.
Electric controlled door magnetic latching relay of the invention includes coil and movable contact K, when base selector output pulsed drive letter
The conversion of number realization relay working condition, drives in base selection circuit when a coil windings of electric controlled door magnetic latching relay connect
The output end of moving cell, the output end of a termination UH hole top signal amplifier of movable contact K, another termination modulator of contact
Input terminal；When the selected time window of not timed out base selector, not yet reached corresponding to true UH well head road signal
Period, contact disconnects, and the relevant interference that UH hole top signal amplifier is exported do not transmit；When to when base selection circuit
When selected time window, corresponding to the period that true UH well head road signal will reach, contact is connected, UH hole top signal
The true UH hole top signal that amplifier is exported then is transmitted over；Another coil windings of magnetic latching relay connect well head focus
The RS general reset signal of synchronization system, using original RS as general reset signal, by electronically controlled door magnetic latching relay etc.
Interlock circuit is reset to original state.
Beneficial effects of the present invention:
It is abnormal to reduce UH (Up-Hole) well head road signal τ value in use, by the way that suitable time window is arranged by the present invention
Phenomenon.According to the actual conditions of seismic prospecting operation area, suitable time threshold value is set；The setting of the time window so that
Arriving true well head road signal UH after FIRE igniting detonator signal, (uphole geophone is because first received by focus detonation
Vibration signal) reach before this period, well head road signal UH detection circuit do not work, to exclude true UH well head road letter
Number reach before certain interference, so that it is only able to detect true UH well head road signal, it is ensured that UH well head road signal τ value is just
Often.
Detailed description of the invention
Fig. 1 is UH well head road signal schematic representation of the invention.
Fig. 2 is structural schematic diagram of the invention.
Fig. 3 is the circuit diagram of UH hole top signal amplifier of the invention.
The circuit diagram of base selection circuit when Fig. 4 is of the invention.
Fig. 5 is the circuit diagram of electronically controlled door magnetic latching relay of the invention.
Fig. 6 is the schematic diagram that interference causes well head road signal time value τ value to shift to an earlier date.
Fig. 7 is Electron door control time relationship schematic diagram.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in fig. 6, the UH well head road signal τ value occurred in the normal situation of excitation well depth is less than normal value.
A large amount of practices confirm: before the arrival of true hole top signal, there is a variety of vibration interferences around well head, such as: wind grass
Dynamic, animal walks about, mechanical oscillation etc..As long as vibration interference reaches certain amplitude, just takes for hole top signal and have arrived at, because
There is the case where UH well head road signal τ value is less than normal value in this.
Suitable time window is arranged in patent device, solves UH well head road signal τ value abnormal problem.Its basic principle
Be: one Electron door control of setting, before the arrival of true hole top signal, which is to close, and takes for hole top signal
Other vibration interferences cannot get through, and only before the arrival of true hole top signal, electronic gate slightly advance door opening is met true
The arrival of real hole top signal, to effectively prevent the case where UH well head road signal τ value is less than normal value.Time relationship schematic diagram
As shown in Figure 7.
As shown in Fig. 2, UH hole top signal amplifier is filtered after the signal for receiving focus vibration, is limited in the present invention
It send after width, amplification to electronically controlled door, but whether the electronically controlled door is opened, then the control of base selection circuit when depending on.When
When base selection circuit issue the control signal to open the door after, which could open, and only at this moment, UH hole top signal is
It can be transferred to modulator, be sent to the encoder in system for acquiring seismic data after the modulation of modulator, then via radio station,
UH hole top signal is demodulated to send to system for acquiring seismic data and record by encoder.
As shown in figure 3, first vibration signal received by UH uphole geophone may be positive jump after focus detonation
(up jumping), it is also possible to be negative jump (jumping down), be two-way signal.Therefore the circuit in UH hole top signal amplifier is
It is two-way, i.e., two-way filter, two-way limiter, two-way first stage amplifier, two-way two-stage amplifier.
Capacitor C1, C2 and resistor R1, R2 form filter, and the purpose is to filter out unwanted frequency ingredient.It is many
Well known: capacitive reactance is the function of frequency, i.e. the more high then capacitive reactance of frequency is smaller, and the radio-frequency component in signal will be by capacitor C1, C2
Switch to ground.Capacitor C1 is connected in parallel with resistor R1, and capacitor C2 is connected in parallel with resistor R2.Capacitor C1 and electricity
Resistance mono- tie point of device R1 connects the end UH+ of UH uphole geophone, another tie point ground connection of capacitor C1 and resistor R1；Electricity
A tie point of container C2 and resistor R2 connects another of the end UH- of UH uphole geophone, capacitor C2 and resistor R2
Tie point ground connection.
Diode D1, D2, D3, D4 form limiter.Diode D1, D2 form positive limiter, the positive termination of diode D1
The end UH+ of UH uphole geophone, the end UH- of the positive termination UH uphole geophone of diode D2.The negative terminal of diode D1, D2 are connected
It connects and connects the positive reference power source of+VE.When the positive range value of signal reference voltage positive no more than+VE, then diode D1, D2 is cut
Only, signal is then transferred to next stage；And when the positive range value of signal is greater than the positive reference voltage of+VE, then diode D1, D2
Conducting, signal are then limited in a certain range value.Diode D3, D4 form negative limiter, and the negative terminal of diode D3 connects UH well head
The end UH+ of wave detector, the negative terminal of diode D4 connect the end UH- of UH uphole geophone.The anode of diode D3, D4 are connected simultaneously
Connect the negative reference power source of-VE.When the negative range value of signal reference voltage negative no more than-VE, then diode D3, D4 ends,
Signal is then transferred to next stage；And when the negative range value of signal reference voltage negative lower than-VE, then diode D3, D4 is led
Logical, signal is then limited in a certain range value.By using slicer, limit the range value of received hole top signal
System is between the positive reference power source of+VE and the negative reference power source of-VE, so that subsequent first stage amplifier and two-stage amplifier be made to be unlikely to
Saturation jamming due to signal is too big.
Operational amplifier A1 and resistor R3, R4, R5, R6 and operational amplifier A2 and resistor R7, R8, R9, R10 group
It is in pairs to first stage amplifier, the purpose is to suitably amplify the UH hole top signal for passing through filtering, clipping.Operational amplifier A1's
The end UH+ of another termination UH uphole geophone of negative input end termination resistor R3, resistor R3.The positive input of operational amplifier A1
The end UH- of another termination UH uphole geophone of termination resistor R4, resistor R4.Similarly: the negative input of operational amplifier A2
The end UH- of another termination UH uphole geophone of termination resistor R7, resistor R7.The positive input of operational amplifier A2 terminates electricity
Hinder device R8, the end UH+ of another termination UH uphole geophone of resistor R8.
Operational amplifier A3 and resistor R11, R12, R13, R14 form two-way two-stage amplifier, will by filtering,
Clipping and the UH hole top signal of level-one amplification carry out second level amplification.The negative input end termination resistor R11 of operational amplifier A3, resistance
Another termination operational amplifier A1 output end of device R11.Positive input terminal the termination resistor R12, resistor R12 of operational amplifier A3
Another termination operational amplifier A2 output end, operational amplifier A3 output termination electronically controlled door magnetic latching relay dynamic touching
Point K.In this way, by electronic control door sensor is reached by the UH hole top signal transmission of filtering, clipping, level-one amplification and second level amplification
The movable contact K of guard relay.But can the signal then depend on the switch state of this by electronically controlled door.If the door
In an ON state, then the signal passes through the movable contact K of magnetic latching relay.If at the movable contact K of the door sensor guard relay
In off-state, then the signal cannot pass through.When the door can be opened, then be by when base selection circuit control.Only selecting
Fixed time window could be opened, and UH hole top signal passes through；And in the non-selected period, door is to be in close state, related
Signal cannot pass through.
As shown in figure 4, when base selection circuit be made of two partial circuits, respectively decade counter Z1, Z3 and compare
Device Z2, Z4 are constituted, while being again respectively decade counter Z1, the comparator Z2 of units and the decade counter of tens
Device Z3, comparator Z4 are constituted.Using the sprocket pulse of original 1mS as when base, using original RS as general reset signal,
By when the interlock circuits such as base selection circuit, electronically controlled door magnetic latching relay be reset to original state.
The input of units decade counter Z1 terminates sprocket pulse, and carry-out terminates tens decade counter
The input terminal of Z3.The output end group that 1A0~1A3 counts pulse connects the corresponding input terminal group of comparator Z2, the carry of comparator Z2
The input terminal of output termination tens decimal system comparator Z4., another group of input terminal group A0~A3 of comparator is selected respectively connects height
Level+5V or low level ground connection.High level is to choose, for example, A0 is grounded, A1 connects high level, A2 connects high level, A3 ground connection, then
Its time value is just 6mS.
The carry output of the input termination units decade counter Z1 of tens decade counter Z3, tens
The carry output of the input termination units comparator Z2 of comparator Z4, the input of comparator Z4 carry-out terminator actuator
End.The output end group that 2B0~2B3 counts pulse connects the corresponding input terminal group of comparator Z4, another group of input terminal of comparator Z4
Group B0~B3 is selected respectively connects high level+5V or low level ground connection.High level be choose, for example, B0 connect high level, B1 ground connection,
B2 ground connection, B3 ground connection, then its time value is just 10mS (because its power is tens).In this way, a position chooses 6, ten is choose 1 i.e.
It is 10, total value is exactly 16.Again due to when base be 1mS sprocket pulse, so total time value is exactly 16mS.This is through driver
It after power drive, send to the coil-end of electronically controlled door magnetic latching relay, opened point is attracted, and controls the door sensor guard relay
Movable contact K connect, hole top signal passed through.It can thus be appreciated that: the UH well head road signal τ value in such as certain work area is should normally be
18mS, and the period before 16mS, door are in an off state, therefore the various vibrations before being shut off 16mS are dry
It disturbs, has fundamentally thoroughly prevented the case where UH well head road signal τ value is less than normal value generation, it is ensured that UH well head road signal τ
Value is normal.Greatly reduce the UH well head road signal τ value caused by the too small time value it is abnormal due to the secondary, waste product that generates, greatly
Reduce benefit big gun greatly and resurveys seismic data.Thus production efficiency, economic benefit are substantially increased.Theoretically, such as
2mS before selected true UH hole top signal arrives opens the door, then the probability that secondary, waste product generates is only original 1/9.Certainly
Selected opening time, depending on the concrete condition in each operation work area, i.e., according to the depth of the work area well and the work area table
Depending on the speed of layer direct wave.The depth of well is deeper, then uphole time τ value is bigger, conversely, if the depth of well is more shallow, well head
Time τ value is smaller.Similarly, the speed of surface layer direct wave is lower, then uphole time τ value is bigger, conversely, if the speed of surface layer direct wave
Degree is higher, then uphole time τ value is smaller.It is recommended that: opening time, which is selected in the 2mS enabling before true hole top signal reaches, is
Preferably.The generation for both having prevented abnormal small UH well head road signal τ value in this way, also ensures the unimpeded nothing in true hole top signal channel
Resistance.
Z1, Z3 of the invention is counter, and Z2, Z4 are comparator, and Z5, Z6 are driver, and T1 is triode, D5 bis-
Pole pipe, magnetic latching relay are the magnetic latching relay of twin coil winding.
As shown in figure 5, electronically controlled door is magnetic latching relay, as long as its main feature is that passing through a pulsed drive in coil
Signal can realize the conversion of its working condition, be maintained at the stable state being switched on or switched off without being electrified for a long time, small in size,
Light-weight, power consumptive province, movement are fast, non-maintaining.
When one coil windings of magnetic latching relay connect in base selection circuit driver output end.It acts contact
The output end of one termination UH hole top signal amplifier, the input terminal of another termination modulator of contact.When not timed out base selects electricity
When the selected time window in road, the period that true UH well head road signal not yet reaches, contact are exactly corresponded at this time
It disconnects, the correlation signal transmission that UH hole top signal amplifier is exported not to be pass by, to thoroughly prevent UH well head road signal τ value
Abnormal (too small UH well head road signal τ value).And when to when base selection circuit selected time window when, it is just right at this time
It should be connected in the period that true UH well head road signal will reach, contact, UH hole top signal amplifier is exported true
UH hole top signal then transmit over.In other words, patent device had both thoroughly prevented different because of caused by other interference vibrations
Often small UH well head road signal τ value, also ensures the unblocked of true hole top signal.
Another coil windings of magnetic latching relay connect RS general reset signal, are believed using original RS as general reset
Number, the interlock circuits such as electronically controlled door magnetic latching relay are reset to original state；Magnetic latching relay is twin coil winding
Magnetic latching relay.
When the present invention is embodied:
As previously mentioned, detonating from focus, seismic wave is 18ms by the time that focus passes to uphole geophone, as long as at this moment
Between theres are certain vibration interference in window, it is possible to generate extremely small UH well head road signal τ value, cause waster.At certain
Electronically controlled door is opened when opening time is selected in the 2ms, i.e. 16ms before true UH hole top signal reaches by work area.It is practical
The result is that: the waster as caused by UH well head road signal τ value exception has decreased to original 1/9.Again it mends big gun and resurveys ground
The workload of shake data reduces 8/9.5000 yuan or more are at least according to the expense of current one physical points of seismic prospecting to calculate,
Acquired direct economic benefit is ten hundreds of daily, extremely considerable.More it is essential that thoroughly having prevented due to mending again
Big gun resurvey seismic data and discontinued normal field work (because being mended during big gun resurveys seismic data again,
Seismic survey lines are unable to normal movement), therefore substantially increase the production efficiency of field acquisition seismic data, economic benefit.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (5)
1. a kind of exception well head τ value disposal plant, it is characterized in that: include UH signal amplifier, when base selector, automatically controlled door sensor guarantor
Relay, modulator, radio station and antenna are held, the UH signal amplifier is connected with the signal output end of uphole geophone,
For receiving focus vibration signal, the data-signal of the signal output end and electric controlled door magnetic latching relay of UH signal amplifier is defeated
Enter end be connected, when base selector signal input part be connected with the output end of time base circuit, for into line timebase selection, signal
Output end is connected with the control signal input of electric controlled door magnetic latching relay, electric controlled door magnetic latching relay according to when base select
What device issued opens gate control signal, selects the state of electronically controlled door, and the output end of electric controlled door magnetic latching relay connects modulation
The signal output end of the signal input part of device, modulator connects radio station, the volume being sent in system for acquiring seismic data by radio station
Code device is demodulated UH well head road signal to send to system for acquiring seismic data and record by encoder；
The electric controlled door magnetic latching relay includes coil and movable contact K, when base selector output pulse drive signal realize
The conversion of electric controlled door magnetic latching relay working condition, base selector when a coil windings of electric controlled door magnetic latching relay connect
The output end of middle driving unit, the output end of a termination UH signal amplifier of movable contact K, another termination modulator of contact
Input terminal；When the selected time window of not timed out base selector, i.e., true UH well head road signal not yet reach when
Between section, contact disconnects, and the relevant interference that UH signal amplifier is exported do not transmit；When reaching, base selector is selected
Between window when, i.e., the period that will reach of true UH well head road signal, contact are connected, and UH signal amplifier is exported true
The real UH well head road signal transmission past；Another coil windings of electric controlled door magnetic latching relay connect well head synchronous system of source
The interlock circuit of electric controlled door magnetic latching relay is reset to by RS general reset signal using original RS as general reset signal
Original state；The UH signal amplifier includes the filter unit being sequentially connected in series, clipping unit, level-one amplifying unit and second level
Amplifying unit；Aforementioned filter unit, clipping unit, level-one amplifying unit and second level amplifying unit are all made of two-way circuit, filtering
Unit includes resistor R1, R2 and capacitor C1, C2, and clipping unit includes diode D1-D4, and level-one amplifying unit includes resistance
Device R3-R10, operational amplifier A1, A2 and capacitor C3-C6, second level amplifying unit include resistor R11-R14, operation amplifier
Device A3 and capacitor C7-C8.
2. exception well head τ value disposal plant according to claim 1, it is characterized in that the radio-frequency component in signal will be by capacitor
Device C1, C2 switch to ground, and capacitor C1 is connected in parallel with resistor R1, and capacitor C2 is connected in parallel with resistor R2, capacitor
A tie point of C1 and resistor R1 connects the end UH+ of uphole geophone, another tie point of capacitor C1 and resistor R1
Ground connection；A tie point of capacitor C2 and resistor R2 connects the end UH- of uphole geophone, and capacitor C2 is another with resistor R2's
One tie point ground connection.
3. exception well head τ value disposal plant according to claim 1, it is characterized in that diode in the clipping unit
D1, D2 form positive limiter, the end UH+ of the positive termination uphole geophone of diode D1, the positive termination well head detection of diode D2
The end UH- of device；The negative terminal of diode D1, D2 are connected, and connect the positive reference power source of+VE；When signal positive range value no more than+
When the positive reference voltage of VE, diode D1, D2 cut-off, signal are transferred to next stage；When the positive range value of signal is being greater than+VE just
When reference voltage, diode D1, D2 conducting, signal are limited in a certain range value, and diode D3, D4 form negative clipping
Device, the negative terminal of diode D3 connect the end UH+ of uphole geophone, and the negative terminal of diode D4 connects the end UH- of uphole geophone, diode
The anode of D3, D4 are connected, and connect the negative reference power source of-VE, when the negative range value of signal is not more than the negative reference voltage of-VE
When, diode D3, D4 cut-off, signal are transferred to next stage；When the negative range value of signal reference voltage negative lower than-VE,
Diode D3, D4 conducting, signal are limited in a certain range value；By using slicer, believe received well head
Number range value be limited between the positive reference power source of+VE and the negative reference power source of-VE, to make subsequent first stage amplifier and second level
Amplifier is unlikely to saturation jamming due to signal is too big.
4. exception well head τ value disposal plant according to claim 1, it is characterized in that the level-one amplifying unit is by transporting
It calculates amplifier A1 and resistor R3-R6 and operational amplifier A2 and resistor R7-R10 and forms two-way first stage amplifier, be used for
It will be amplified by the UH well head road signal of filtering, clipping, the negative input end termination resistor R3 of operational amplifier A1, resistor
The end UH+ of another termination uphole geophone of R3, the positive input terminal termination resistor R4 of operational amplifier A1, resistor R4's is another
Terminate the end UH- of uphole geophone；Similarly: the negative input end termination resistor R7 of operational amplifier A2, the other end of resistor R7
Connect the end UH- of uphole geophone, another termination well head inspection of positive input terminal the termination resistor R8, resistor R8 of operational amplifier A2
The end UH+ of wave device；
Second level amplifying unit forms two-way two-stage amplifier by operational amplifier A3 and resistor R11-R14, will be through filtering
The UH well head road signal of wave, clipping and level-one amplification carries out second level amplification, the negative input end termination resistor of operational amplifier A3
Another termination operational amplifier A1 output end of R11, resistor R11；The positive input terminal termination resistor R12 of operational amplifier A3,
Another termination operational amplifier A2 output end of resistor R12, operational amplifier A3 output termination electric controlled door magnetic latching relay
Movable contact K, in this way, will by filtering, clipping, level-one amplification and second level amplify UH well head road signal be transferred to automatically controlled door sensor
The movable contact K of guard relay, the movable contact K of the electric controlled door magnetic latching relay of base selector adjustment at that time is in an ON state
When, signal passes through, and the movable contact K of Ruo Shiji selector adjustment electric controlled door magnetic latching relay is in an off state, then the signal
It cannot pass through.
5. exception well head τ value disposal plant according to claim 1, it is characterized in that the when base selector includes by a
Digit decade counter Z1, tens decade counter Z3 and units comparator Z2, tens decimal system comparator Z4
The when base selecting unit of composition, and the driving unit being made of driver Z5, Z6, triode T1 and diode D5, it is described
When base selecting unit and driving unit be sequentially connected in series, the output end of driving unit is connected to the coil of electric controlled door magnetic latching relay
End, opened point are attracted, and the movable contact K of control electric controlled door magnetic latching relay is connected, and hole top signal is passed through, wherein；
The input of units decade counter Z1 terminates sprocket pulse, and carry-out terminates tens decade counter Z3's
Input terminal, the output end group 1A0-1A3 for counting pulse meet the corresponding input terminal group of units comparator Z2, units comparator Z2
Carry-out termination tens decimal system comparator Z4 input terminal, another group of input terminal group A0-A3 of comparator select respectively
Connect high level+5V or low level ground connection；
Tens decade counter Z3 input termination units decade counter Z1 carry output, tens ten into
The carry output of the input termination units comparator Z2 of comparator Z4 processed, tens decimal system comparator Z4 carry output
Connect the input terminal of driving unit；The output end group 2B0-2B3 of the counting pulse of tens decimal system comparator Z4 connects tens ten
The corresponding input terminal group of system comparator Z4, another group of input terminal group B0-B3 of tens decimal system comparator Z4 is selected respectively to be connect
High level+5V or low level ground connection.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2775349B1 (en) * | 1998-02-20 | 2000-04-07 | Inst Francais Du Petrole | METHOD AND DEVICE FOR THE PERMANENT MONITORING OF A SUBTERRANEAN FORMATION |
| CN1325030A (en) * | 2000-05-18 | 2001-12-05 | 中国石油化工股份有限公司中原油田分公司 | Accurate wellhead time acquiring method and device for explosion machine |
| CN200962148Y (en) * | 2006-07-04 | 2007-10-17 | 大庆石油管理局 | Well mouth signal simulator |
| CN101308007B (en) * | 2007-05-16 | 2012-10-03 | 康志顺 | Synchronization control processing method and system |
| GB201012175D0 (en) * | 2010-07-20 | 2010-09-01 | Metrol Tech Ltd | Procedure and mechanisms |
| CN102507247B (en) * | 2011-11-03 | 2014-11-05 | 中国石油化工股份有限公司 | Emulator for wellhead of blaster and emulation method |
| CN206440840U (en) * | 2016-08-24 | 2017-08-25 | 中国石油化工股份有限公司 | A kind of abnormal well head τ value disposal plants |
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