CN103777246A - Common source receiving system of seismic prospecting instrument and VSP logging instrument - Google Patents
Common source receiving system of seismic prospecting instrument and VSP logging instrument Download PDFInfo
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- CN103777246A CN103777246A CN201410045384.9A CN201410045384A CN103777246A CN 103777246 A CN103777246 A CN 103777246A CN 201410045384 A CN201410045384 A CN 201410045384A CN 103777246 A CN103777246 A CN 103777246A
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Abstract
The invention discloses a common source receiving system of a seismic prospecting instrument and a VSP logging instrument. The system comprises the seismic prospecting instrument, a modulator, an encoder, a first broadcasting station arranged at the position where the seismic prospecting instrument is located, a second first broadcasting station arranged at the position where a shotpoint excitation device is located, a decoder, the shotpoint excitation device, a surface geophone, a VSP borehole geophone, a third broadcasting station and the VSP logging instrument, wherein the surface geophone and the VSP borehole geophone are arranged at receiving points, and the third broadcasting station is arranged at the position where the VSP logging instrument is located. The precise and synchronous relation among the seismic prospecting instrument, the VSP logging instrument and the excitation point is ensured through the modulator, the encoder, the decoder, the demodulator and radio stations connected between the modulator, the encoder, the decoder and the demodulator, two-dimensional and three-dimensional seismic exploration and VSP logging working are synchronously carried out, the shotpoint focus is shared, repeated excitation of the same excitation points in the same working area by the seismic exploration and the VSP logging is avoided, and the excitation workloads are saved by two times.
Description
Technical field
The present invention relates to that two kinds of method of exploration of seismic prospecting and VSP well logging, homology are shared, system synchronization.Specifically: the seismic event in petroleum prospecting, the seismic prospecting of carrying out respectively being excited, receive by 400 serial seismic instruments the reflection wave that stratum is come, direct wave with the reception of VSP well logger, use same excitaton source, two cover instruments complete earthquake reflected wave and well logging direct wave reception work simultaneously, complete seismic prospecting instrument and synchronize and receive with VSP well logger common source.
Background technology
Petroleum prospecting is by multidisciplinary, technological side covers wide, and independently specialty completes separately.Seismic prospecting and VSP well logging is different geophysical survey field.Its object is all around getting subsurface geological structure clear, finds hydrocarbon-bearing pool, and method of seismic prospecting is in macroscopic view, to investigate thoroughly underground form and distribution, and VSP well logging investigates thoroughly emphatically that stratum is longitudinally gone up, each little zone thickness and resolution situation.Both combinations can be investigated thoroughly underground structure and depth of burial and stratigraphic distribution more effectively.Both one laterally complement one another on upper, the longitudinal microcosmic of macroscopic view and perfect.
Seismic prospecting instrument is to receive the reflection wave from stratum at ground earthquake-wave-exciting and ground embedding detector.Logging instrumentation be ground earthquake-wave-exciting in well, place wave detector receive under ground arrival point direct wave.Two kinds of methods are all to utilize seismic travel time and velocity of propagation as parameter study buried depth of strata and thickness.Because two cover systems are respectively for sequential timekeeping system is independently difficult to meet synchronous.Two cover systems are fought separately all the time, and in two kinds of methods for the different time of same place, two cover instruments have been received as same target, are both again the akin work of earthquake stimulation seismic event that utilizes.The very corn of a subject is the system time difference of two cover instruments, different time excitation energy, frequency, interference source are all changing, systematic error can cause stratigraphic interpretation time and do not reach requirement, in stratum, earthquake velocity of wave propagation is generally in 4000-5000m/second, two cover systems as can not be synchronously with artificial know can precision 5 milliseconds (4000 meter per seconds-5000m/seconds) × 0.0005 second=20 meters.Occur that formation calibration is inaccurate, dislocation, be less than ten meters of following oil reservoirs and usually can not be found.The fusion of two cover method and technology series is imperative, must solve the synchronous of two cover systems.
In same work area (region), be engaged in two dimension, 3-d seismic exploration and VSP logging operation in the past and be respectively do each: two dimension, 3-d seismic exploration and VSP logging operation carry out respectively.Exciting with exciting of VSP well logging of two dimension, 3-d seismic exploration repeats to implement.Take a work area operation as example, in same work area (region), the same shot point of two dimension, 3-d seismic exploration and VSP electrofacies is about 8000 big guns.That is to say: both repeat the workload that excites of a times (8000 big guns, cost are millions of at least), less economical, waste again the double time, efficiency is low, and excitation condition is not single, is unfavorable for explaining the correct judgement of contrast.
Summary of the invention
In the object of the invention is to log well with VSP for current common seismic exploration, adopt subshot, repeat to arrange the construction method that row receive, existing time-consuming bothersome, efficiency is low, cost is high, cannot guarantee that two cover instruments existence excite and gather Data coordinating, duty factor is not single, be unfavorable for the correct judgement of the correct judgement of operation result and zone of interest position, that existing synchronization accuracy cannot guarantee, be unfavorable for the problem of high-quality earthquake data acquisition, one is proposed both flexible, the seismic prospecting instrument of precise synchronization and VSP logging instrumentation common source receiving system again.
Technical scheme of the present invention is:
A kind of seismic prospecting instrument and VSP logging instrumentation common source receiving system, it comprises seismic prospecting instrument, modulator, scrambler, be arranged at the on-site radio station of seismic prospecting instrument transmitting-receiving control module one, radio station one, be arranged at the on-site radio station two of shot point excitation apparatus, code translator, radio station transmitting-receiving control module two, shot point excitation apparatus, the surface geophone that is arranged at each acceptance point and VSP well geophone, be arranged at the on-site radio station three of VSP logging instrumentation, radio station receives control module and VSP logging instrumentation
The control signal end of described seismic prospecting instrument is connected with modulator two-phase, modulator is two-way connection of downgoing signal end with radio station transmitting-receiving control module one by scrambler, the radio station transmitting-receiving upward signal end of control module one and two-way connection of downgoing signal end in radio station one, the upward signal end in radio station one and radio station two, three upward signal end is by radiowave wireless connections, output shot point excites synchronizing signal, the downgoing signal end in described radio station two is two-way connection of upward signal end with radio station transmitting-receiving control module two by code translator, the downgoing signal end of radio station transmitting-receiving control module two is connected with shot point excitation apparatus, the control signal output terminal of this shot point excitation apparatus connects shot point, the downgoing signal end in described radio station three connects the upward signal input end of radio station reception control module, radio station receives the downgoing signal output terminal of control module and the signal input part of detuner, the signal output part of described detuner is connected with the control signal input end of VSP logging instrumentation, corresponding detection signal when the described surface geophone that is arranged at each acceptance point and VSP well geophone obtain respectively shot point explosion, the signal output part output reflection seismic event of each surface geophone is transferred to seismic prospecting instrument by seismic cable, and the through seismic event of signal output part output of VSP well geophone is transferred to VSP logging instrumentation by logging cable.
Between seismic prospecting instrument of the present invention and 428 modulation circuits, drive interface to connect by light-coupled isolation, between VSP logging instrumentation and VSP detuner, drive interface to connect by light-coupled isolation.
Radio station of the present invention transmitting-receiving control module one, two and radio station receive control module and include resistance R 1, R2, diode D1, triode Q1 and photoelectrical coupler L1, one end of resistance R 1 connects the signal output part of prime equipment, the base stage of the other end connecting triode Q1 of resistance R 1, the grounded emitter of triode Q1, parallel resistance R2 between emitter and base stage, the collector of triode Q1 connects the positive pole of diode D1, the negative pole of diode D1 connects power supply, photoelectrical coupler L1 is connected in parallel on the two ends of diode D1, and photoelectrical coupler L1 output coupled signal is to rear class equipment.
In transmitting-receiving control module one in radio station of the present invention, one end of resistance R 1 connects the signal output part of scrambler, and photoelectrical coupler L1 output coupled signal is to the control signal input end in radio station one; In radio station transmitting-receiving control module two, one end of resistance R 1 connects the signal output part of code translator, and photoelectrical coupler L1 output coupled signal is to the control signal input end of shot point excitation apparatus; Radio station receives in control module, the signal output part in the connection radio station, one end three of resistance R 1, and photoelectrical coupler L1 output coupled signal is to the signal input part of detuner.
Shot point excitation apparatus of the present invention is blaster.
Modulator of the present invention comprises resistance R 3, R5, by amplifier U1, U2, resistance R 6, the second amplifying circuit that R4 forms, coupling transformer T1, high frequency filter C1 and build-out resistor R7, R8, described resistance R 3, one end of R5 connects respectively the synchronous signal output end of seismic prospecting instrument, resistance R 3, the other end of R5 connects respectively the input end of second amplifying circuit, the input end of the output terminal butt coupling transformer T1 of second amplifying circuit, an output terminal of coupling transformer T1 connects one end of high frequency filter C1, another output terminal of coupling transformer T1 is connected in series build-out resistor R7 successively, the other end of R8 tremendously high frequency wave filter C1, the two ends of resistance R 8 connect scrambler as the input/output terminal of modulator, send shot point and excite synchronizing signal.
Detuner of the present invention comprises coupling transformer T2, diode D2-D4, amplifier U3-U5, resistance R 9-R16 and capacitor C 2-C3, the input end of described coupling transformer T2 connects the output terminal in radio station three as the input of detuner, the output terminal of coupling transformer T2 connects by amplifier U3, the second amplifying circuit that U4 forms, an output terminal of coupling transformer T2 is by diode D2 ground connection, between the anti-phase scaling signal input end of amplifier U4 and output terminal and meet filter capacitor C3, the output terminal of amplifier U4 is as one end of the output contact resistance R12 of second amplifying circuit, between the output terminal of the other end of resistance R 12 and amplifier U3 and connect by diode D3 in parallel, the amplitude limiter circuit that D4 forms, resistance R 12, the tie point of the negative pole of the positive pole of diode D3 and diode D4 connects by amplifier U5, the amplifying circuit that resistance R 13 forms, one end of the output terminal contact resistance R15 of amplifier U5, the other end of resistance R 15 is as the output of detuner, output shot point excites synchronizing signal to VSP logging instrumentation.
Beneficial effect of the present invention:
1. the present invention is synchronizeed two dimension, 3-d seismic exploration to carry out with VSP logging operation, share shot point focus, avoided seismic prospecting and VSP well logging in same work area (as regions such as Ba Wu work areas, city of Gongzhuling of Jilin Province) identical shot point repeat excite, saved the workload that excites of a times;
The present invention organically combines seismic prospecting and VSP these two geophysical survey of logging well, avoided identical shot point in same work area (region) repeat excite.Be conducive to: 1. improved work efficiency.Saved the time of one times, approximately 20 working days, (3-d seismic exploration troop was generally hundreds of people, and VSP well logging troop is generally tens of people.Also to be equipped with corresponding vehicle, logistics support etc.) simultaneously.2. provide cost savings.Save the workload that excites of a times: drilling well, detonator, explosive, by 1000 yuan of calculating of each shot point, save altogether 8,000,000 yuan.Effect is obvious, remarkable in economical benefits.
2. the present invention: surveying accuracy greatly improves, the time difference precision that the data human eye that two cover instruments gather is differentiated is at 5 milliseconds, and the synchronization accuracy of instrument of the present invention is several microseconds, can eliminate the error in stratigraphic interpretation.
3. the present invention: the same seismic event factor of reception that excites is single, there is comparability, the wavelet that particularly two kinds of instruments collect is identical, the contrast of two kinds of methods, the small and weak information correlativity of interlayer is stronger, make two kinds of methods solve stratigraphic distributions and longitudinally contrast according to more abundant, avoided multi-solution.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Fig. 2 is the circuit diagram that radio station transmitting-receiving control module one, two and radio station receive control module.
Fig. 3 is the circuit diagram of modulator.
Fig. 4 is the circuit diagram of detuner.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, a kind of seismic prospecting instrument and VSP logging instrumentation common source receiving system, be applicable to any seismic prospecting instrument and any VSP logging instrumentation, it comprises seismic prospecting instrument (in this example, model is that 428XL method is domestic), modulator, scrambler (in this example, model is domestic in ZN601), be arranged at the on-site radio station transmitting-receiving of seismic prospecting instrument control module one, radio station one, be arranged at the on-site radio station two of shot point excitation apparatus, code translator (in this example, model is domestic in ZN601), radio station transmitting-receiving control module two, shot point excitation apparatus (in this example, model is domestic in ZN601), be arranged at surface geophone (in this example, model is that the SM24 U.S. produces) and the VSP well geophone (in this example, model is that Geochain method is domestic) of each shot point, be arranged at the on-site radio station three of VSP logging instrumentation, radio station receives control module and VSP logging instrumentation,
The control signal end of described seismic prospecting instrument is connected with modulator two-phase, modulator is two-way connection of downgoing signal end with radio station transmitting-receiving control module one by scrambler, the radio station transmitting-receiving upward signal end of control module one and two-way connection of downgoing signal end in radio station one, the upward signal end in radio station one and radio station two, three upward signal end is by radiowave wireless connections, output shot point excites synchronizing signal, this signal is synchronizeed with instrument trigger pip, the downgoing signal end in described radio station two is two-way connection of upward signal end with radio station transmitting-receiving control module two by code translator, the downgoing signal end of radio station transmitting-receiving control module two is connected with shot point excitation apparatus, the control signal output terminal of this shot point excitation apparatus connects shot point, the downgoing signal end in described radio station three connects the upward signal input end of radio station reception control module, radio station receives the downgoing signal output terminal of control module and the signal input part of detuner, the signal output part of described detuner is connected with the control signal input end of VSP logging instrumentation, corresponding detection signal when the described surface geophone that is arranged at each acceptance point and VSP well geophone obtain respectively shot point explosion, the signal output part output reflection seismic event of each surface geophone is transferred to seismic prospecting instrument by seismic cable, and the through seismic event of signal output part output of VSP well geophone is transferred to VSP logging instrumentation by logging cable.
Between seismic prospecting instrument of the present invention and 428 modulation circuits, drive interface to connect by light-coupled isolation, between VSP logging instrumentation and VSP detuner, drive interface to connect by light-coupled isolation.
Radio station of the present invention transmitting-receiving control module one, two and radio station receive control module and include resistance R 1, R2, diode D1, triode Q1 and photoelectrical coupler L1, one end of resistance R 1 connects the signal output part of prime equipment, the base stage of the other end connecting triode Q1 of resistance R 1, the grounded emitter of triode Q1, parallel resistance R2 between emitter and base stage, the collector of triode Q1 connects the positive pole of diode D1, the negative pole of diode D1 connects power supply, photoelectrical coupler L1 is connected in parallel on the two ends of diode D1, and photoelectrical coupler L1 output coupled signal is to rear class equipment.
In transmitting-receiving control module one in radio station of the present invention, one end of resistance R 1 connects the signal output part of scrambler, and photoelectrical coupler L1 output coupled signal is to the control signal input end in radio station one; In radio station transmitting-receiving control module two, one end of resistance R 1 connects the signal output part of code translator, and photoelectrical coupler L1 output coupled signal is to the control signal input end of shot point excitation apparatus; Radio station receives in control module, the signal output part in the connection radio station, one end three of resistance R 1, and photoelectrical coupler L1 output coupled signal is to the signal input part of detuner.
Shot point excitation apparatus of the present invention is blaster.
Modulator of the present invention comprises resistance R 3, R5, by amplifier U1, U2, resistance R 6, the second amplifying circuit that R4 forms, coupling transformer T1, high frequency filter C1 and build-out resistor R7, R8, described resistance R 3, one end of R5 connects respectively the synchronous signal output end of seismic prospecting instrument, resistance R 3, the other end of R5 connects respectively the input end of second amplifying circuit, the input end of the output terminal butt coupling transformer T1 of second amplifying circuit, an output terminal of coupling transformer T1 connects one end of high frequency filter C1, another output terminal of coupling transformer T1 is connected in series build-out resistor R7 successively, the other end of R8 tremendously high frequency wave filter C1, the two ends of resistance R 8 connect scrambler as the input/output terminal of modulator, send shot point and excite synchronizing signal.
Detuner of the present invention comprises coupling transformer T2, diode D2-D4, amplifier U3-U5, resistance R 9-R16 and capacitor C 2-C3, the input end of described coupling transformer T2 connects the output terminal in radio station three as the input of detuner, the output terminal of coupling transformer T2 connects by amplifier U3, the second amplifying circuit that U4 forms, an output terminal of coupling transformer T2 is by diode D2 ground connection, between the anti-phase scaling signal input end of amplifier U4 and output terminal and meet filter capacitor C3, the output terminal of amplifier U4 is as one end of the output contact resistance R12 of second amplifying circuit, between the output terminal of the other end of resistance R 12 and amplifier U3 and connect by diode D3 in parallel, the amplitude limiter circuit that D4 forms, resistance R 12, the tie point of the negative pole of the positive pole of diode D3 and diode D4 connects by amplifier U5, the amplifying circuit that resistance R 13 forms, one end of the output terminal contact resistance R15 of amplifier U5, the other end of resistance R 15 is as the output of detuner, output shot point excites synchronizing signal to VSP logging instrumentation.
While specifically exciting, seismic prospecting is synchronizeed and is carried out with VSP logging operation, shares shot point focus, seismic prospecting instrument is when ground receives reflection seismic waves, VSP logging instrumentation also, simultaneously at the through seismic event of downhole receiving, has been avoided subshot, efficient, energy-conservation, economical.
The present invention by modulator, scrambler, code translator and detuner and connect wireless station between them guarantee seismic prospecting instrument, VSP logging instrumentation and and this three of shot point between accurate common source receive synchronized relation, common source receives synchronization accuracy and meets relevant industries technical standard.Common source receives simultaneously and solves: 1. the stationary problem of common source reception and seismic prospecting instrument; 2. the stationary problem of common source reception and VSP logging instrumentation; 3. the stationary problem of common source reception and shot point, guarantees that the synchronization accuracy that this three's common source receives meets Its Relevant Technology Standards.It is as shown in table 1 that common source receives the synchronization accuracy actual measurement time difference.
The table 1 synchronization accuracy actual measurement time difference
From actual measurement situation, seismic prospecting instrument and VSP logging instrumentation synchronization accuracy meet the petroleum gas SY/T5314-2004 of People's Republic of China (PRC) industry standard completely.Simple to operate, easy to use, no matter be seismic prospecting instrument or VSP logging instrumentation, both sides are as long as respectively open a switch, an instruction.Facts have proved, receive field construction through the common source of 8000 big guns, effect is splendid.
Radio station of the present invention control module is attached to respectively in the scrambler, code translator of ZN601, and has utilized original power supply; All executive components are optocoupler, select the advantage of optocoupler to be: perform an action fast, reach Microsecond grade, volume is little, lightweight, power consumptive province; The seismic event that same blast excitaton source produces, the reflection seismic waves that ground receives, is transferred in seismic instrument by seismic cable, the through seismic event that downhole receiving arrives, by cable transmission in well in logging instrumentation.
The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.
Claims (7)
1. a seismic prospecting instrument and VSP logging instrumentation common source receiving system, it is characterized in that it comprises seismic prospecting instrument, modulator, scrambler, is arranged at the on-site radio station of seismic prospecting instrument transmitting-receiving control module one, radio station one, is arranged at the on-site radio station two of shot point excitation apparatus, code translator, radio station transmitting-receiving control module two, shot point excitation apparatus, the surface geophone that is arranged at each acceptance point and VSP well geophone, be arranged at the on-site radio station three of VSP logging instrumentation, radio station receives control module and VSP logging instrumentation
The control signal end of described seismic prospecting instrument is connected with modulator two-phase, modulator is two-way connection of downgoing signal end with radio station transmitting-receiving control module one by scrambler, the radio station transmitting-receiving upward signal end of control module one and two-way connection of downgoing signal end in radio station one, the upward signal end in radio station one and radio station two, three upward signal end is by radiowave wireless connections, output shot point excites synchronizing signal, this signal is synchronizeed with instrument trigger pip, the downgoing signal end in described radio station two is two-way connection of upward signal end with radio station transmitting-receiving control module two by code translator, the downgoing signal end of radio station transmitting-receiving control module two is connected with shot point excitation apparatus, the control signal output terminal of this shot point excitation apparatus connects shot point, the downgoing signal end in described radio station three connects the upward signal input end of radio station reception control module, radio station receives the downgoing signal output terminal of control module and the signal input part of detuner, the signal output part of described detuner is connected with the control signal input end of VSP logging instrumentation, corresponding detection signal when the described surface geophone that is arranged at each acceptance point and VSP well geophone obtain respectively shot point explosion, the signal output part output reflection seismic event of each surface geophone is transferred to seismic prospecting instrument by seismic cable, and the through seismic event of signal output part output of VSP well geophone is transferred to VSP logging instrumentation by logging cable.
2. seismic prospecting instrument according to claim 1 and VSP logging instrumentation common source receiving system, it is characterized in that driving interface to connect by light-coupled isolation between described seismic prospecting instrument and 428 modulation circuits, between VSP logging instrumentation and VSP detuner, drive interface to connect by light-coupled isolation.
3. seismic prospecting instrument according to claim 1 and VSP logging instrumentation common source receiving system, it is characterized in that described radio station transmitting-receiving control module one, two and radio station receive control module include resistance R 1, R2, diode D1, triode Q1 and photoelectrical coupler L1, one end of resistance R 1 connects the signal output part of prime equipment, the base stage of the other end connecting triode Q1 of resistance R 1, the grounded emitter of triode Q1, parallel resistance R2 between emitter and base stage, the collector of triode Q1 connects the positive pole of diode D1, the negative pole of diode D1 connects power supply, photoelectrical coupler L1 is connected in parallel on the two ends of diode D1, photoelectrical coupler L1 output coupled signal is to rear class equipment.
4. seismic prospecting instrument according to claim 3 and VSP logging instrumentation common source receiving system, it is characterized in that in described radio station transmitting-receiving control module one, one end of resistance R 1 connects the signal output part of scrambler, and photoelectrical coupler L1 output coupled signal is to the control signal input end in radio station one; In radio station transmitting-receiving control module two, one end of resistance R 1 connects the signal output part of code translator, and photoelectrical coupler L1 output coupled signal is to the control signal input end of shot point excitation apparatus; Radio station receives in control module, the signal output part in the connection radio station, one end three of resistance R 1, and photoelectrical coupler L1 output coupled signal is to the signal input part of detuner.
5. seismic prospecting instrument according to claim 1 and VSP logging instrumentation common source receiving system, is characterized in that described shot point excitation apparatus is blaster.
6. seismic prospecting instrument according to claim 1 and VSP logging instrumentation common source receiving system, it is characterized in that described modulator comprises resistance R 3, R5, by amplifier U1, U2, resistance R 6, the second amplifying circuit that R4 forms, coupling transformer T1, high frequency filter C1 and build-out resistor R7, R8, described resistance R 3, one end of R5 connects respectively the synchronous signal output end of seismic prospecting instrument, resistance R 3, the other end of R5 connects respectively the input end of second amplifying circuit, the input end of the output terminal butt coupling transformer T1 of second amplifying circuit, an output terminal of coupling transformer T1 connects one end of high frequency filter C1, another output terminal of coupling transformer T1 is connected in series build-out resistor R7 successively, the other end of R8 tremendously high frequency wave filter C1, the two ends of resistance R 8 connect scrambler as the input/output terminal of modulator, send shot point and excite synchronizing signal.
7. seismic prospecting instrument according to claim 1 and VSP logging instrumentation common source receiving system, it is characterized in that described detuner comprises coupling transformer T2, diode D2-D4, amplifier U3-U5, resistance R 9-R16 and capacitor C 2-C3, the input end of described coupling transformer T2 connects the output terminal in radio station three as the input of detuner, the output terminal of coupling transformer T2 connects by amplifier U3, the second amplifying circuit that U4 forms, an output terminal of coupling transformer T2 is by diode D2 ground connection, between the anti-phase scaling signal input end of amplifier U4 and output terminal and meet filter capacitor C3, the output terminal of amplifier U4 is as one end of the output contact resistance R12 of second amplifying circuit, between the output terminal of the other end of resistance R 12 and amplifier U3 and connect by diode D3 in parallel, the amplitude limiter circuit that D4 forms, resistance R 12, the tie point of the negative pole of the positive pole of diode D3 and diode D4 connects by amplifier U5, the amplifying circuit that resistance R 13 forms, one end of the output terminal contact resistance R15 of amplifier U5, the other end of resistance R 15 is as the output of detuner, output shot point excites synchronizing signal to VSP logging instrumentation.
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| CN103777246B (en) | 2017-02-01 |
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