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`WG-PGS00110377
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`S0
`
`55
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`WesternGeco Ex. 1005, pg. 2
`
`

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`WG-PGS00110378
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`WesternGeco Ex. 1005, pg. 3
`
`

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`WG-PGS00110379
`
`WesternGeco Ex. 1005, pg. 4
`
`

`
`[coat of Arms of UNION OF SOVIET
`the USSR]
`SOCIALIST REPUBLIC S
`
`(19) SU(11)
`
`(51)5 G01 V 1/00
`
`USSR STATE COMMITTEE
`FOR INVENTIONS AND DISCOVERIES
`
`[ stamp: ]
`All-Union
`[illegible]
`Library
`
`DESCRIPTION OF INVENTION
`TO AUTHOR'S CERTIFICATE
`
`(21) 4359110/24-25
`(22) 01/07/88
`(46) 02/15/90. Bulletin No. 6
`(71) Kiev Geophysical Branch of the Ukrainian
`Research Institute of Geological Exploration
`(72) Yu.V. Timoshin and A.I. Chizhik
`(53) 550.834 (088.8)
`(56)
`I.I. Gurvich Seismic exploration. M., Nedra,
`1970, p. 324-356.
`V.I. Meslibey Multifold reflection technique in
`seismic exploration. M., Ncdra, 1985, p. 94-103.
`USSR Inventor's Certificate No. 1233065, cl. G
`01 V 1/00, 02/03/84.
`(54) METHOD OF SPATLAL SEISMIC
`EXPLORATION USING MULTIFOLD
`
`REFLECTION TECHNIQUE
`(57) The invention relates to methods of seismic
`exploration of mineral deposits. The aim of the
`invention is to improve the efficiency of areal seismic
`surveys. A sequence of P random numbers is
`
`generated for each position ofthe receiving
`device and a series ofP excitation points.
`They are botmded on one side by the
`correlation radius of seismograms obtained
`from the different excitation points, and the
`other — by one-half of the seismogram’s
`duration. These random numbers are used as
`
`launch delays for sources positioned atP
`excitation points while the seismic waves from
`all of these sources are recorded continuously.
`Launch times ofthe sources are stored in the
`
`memory and are used for the separation of the
`wave fields in processing the results. In
`performing summation by using the multifold
`reflection technique, the signals from one
`excitation source are summed in-phase, while
`those from different sources — out-of-phase,
`since the launch delays of the sources are
`random and independent.
`2 illustrations.
`
`This invention relates to spatial seismic exploration
`of mineral deposits
`The aim of the invention is improved efficiency of
`operations.
`Figures I and 2 show a diagram ofthe embodiment
`of this method.
`
`Figure 1 shows profiles 1 and 2, comprising
`excitation points 3.1 — 3.P positioned at a distance
`Ay from each other; profiles 4 and 5 for recording
`of seismic waves, in near proximity of which are
`positioned seismic stations 6 and 7, and which also
`
`comprise seismic wave receiving points 8.1 and
`8N at a distance Ax from each other. The
`
`recorded profiles are spaced at a distance of h
`>> 2» from each other (X is the length of recorded
`seismic wave). The values of Ax and Ay are of
`the same order as the value of 1. Reception
`points 8.1 — 8.N of each recorded profile are
`connected to seismic stations 6 and 7. The
`
`receiving installation, comprising several
`reception points, may occupy different positions,
`9 and 10 (for example) on the shooting line 5.
`
`WG-PGS00110380
`
`WesternGeco Ex. 1005, pg. 5
`
`

`
`The receiving installation in position 9 and
`sources in the excitation points on line 1 fonn one
`position of the acquisition area; receivers in position
`10, and sources on line 2 - another position, and so
`forth, according to the multifold reflection
`technique.
`The hardware for embodiment of the method
`
`(Fig. 2) includes seismic stations 6 and 7, one of
`which (seismic stations 7) is the leading one.
`Seismic station 7 is connected to the generator 11 of
`launch sequence pulses for wave sources 12.1 - l2.P.
`Generator 1
`1 includes a random number generator,
`such as a noise generator based on the radioactive
`decay phenomenon, on the gas discharge in a
`thyratron, etc.
`Generator 11 is connected to the distributor 13,
`embodied in the form of a conventional electronic
`
`commutator switch comprising, for example, a five-
`bit binary counter and a keyset for unipolar voltage
`with outputs. Five bits ofthe counter certainly cover
`the practically possible values of P. A DC voltage
`source is connected to the inputs of all the keys, and
`lunch pulse generators 14 for sources 12.1 - l2.P are
`connected to their outputs.
`The source lunch pulse generator 14 is a
`differentiating amplifier with a sufficiently powerful,
`for example, thyristor-type output, the current of
`which is sufficient to trigger the electric detonator or
`to run the iioii-explosive source.
`The sources may be connected to the outputs of
`generators 14 in a random but known order, i.e. the
`numbers of sources on line 1 and the output numbers
`on generator 14, to which they are connected, may
`differ from each other randomly.
`The leading seismic station 7 is connected with
`the circuits that form the trigger moment tags for all
`sources.
`
`The method is perfomied as follows.
`Observations carried out by the method of
`multifold coverage of boundaries, i.e. seismograms,
`are recorded for each position of the acquisition
`area. On command from seismic station 7, at some
`point operations begin on the current position of the
`acquisition area and generator 11 is launched.
`
`For each position of the acquisition area,
`generator 11 generates a sequence of random
`numbers distributed with equal probability in
`the interval Atm, to T/2, where A tee, is the
`correlation interval for seismograms from
`different excitation points, T is the length of a
`seismogram record from a single source.
`These random numbers are the source trigger
`delays AtT. The delay AtT is the time interval,
`after which the excitation source is triggered,
`relative to some starting moment of
`observations for this position in the
`acquisition area. Based on delays AtT, the
`generator generates P time delays A T, for
`launch of sources relative to each other: AT1
`: AtT 1,1 - AtT) 1, VVhCI'C AtT 1+1 and A111 are
`neighboring values of At~1~. A T, already
`follows the Poisson distribution, i = l-P.
`Values of delays A T1 from generator 11
`are supplied to distributor 13 and further to
`the source trigger signal generators 14. Each
`source receives one trigger signal, which
`launches this source. The triggering moments
`of all sources (usually collected by the
`receivers installed near or directly on the
`sources or by the explosion marking circuits)
`are transmitted to station 7 and are stored
`
`there on the simultaneously recorded
`seismograms. The waves are recoded from all
`P sources 12 continuously from the start of
`monitoring in this position of the acquisition
`area comprising P excitation points. Ptrigger
`pulses with delays AtT are supplied to the
`excitation sources in the time interval A too, i
`AtT ST/2. After triggering of the last source,
`recoding continues for another Tc, so that the
`total time of registration is not more than 15
`Te. In this case, the wave fields of all P
`sources overlap in time and exist in the
`medium concurrently. Due to this, a complex
`incoherent cumulative field with a duration of
`
`kT is created in the environment, where k is
`the coeffieient that reflects the extension of
`
`recording by the delays (1 < k S 1.5).
`
`WG-PGS00110381
`
`WesternGeco Ex. 1005, pg. 6
`
`

`
`As a result, one complex seismogram is
`derived for the first position of the sources and
`receiving system. Thereafter, the receiving
`system and the sources are shifted along lines 4
`and 5, one step towards the next position, and
`the process of excitation and recording of
`waves is repeated again, and so forth.
`Due to the incoherence of the summation of
`
`wave fields, it is possible to separate the wave
`fields from different sources during data
`processing by the CDP method and to perform
`seismic imaging by the diffraction method.
`This is achieved when restoring the compressed
`records by introducing the time delays of equal
`magnitude but opposite sign to the delays
`applied and stored during wave recording.
`Generation of different random numbers
`
`(and time delays) for different positions on the
`wave excitation profiles (sources) results in
`incoherent summation of compressed
`seismograms in multifold coverage of
`boundaries for wave fields of the adjacent
`receiving lines, thus creating the opportunity
`for separation of wave fields from all sources
`positioned 011 the exposed area, iii the course of
`processing the observation results. Failure to do
`so will result in interference from sources
`
`positioned in other excitation profiles.
`
`Claim
`
`This is a method of spatial seismic
`exploration using the multifold reflection
`technique, comprising placement of seismic
`wave receivers in one or several parallel lines
`and placement of excitation points on
`transverse lines, with Ppoints on each of the
`above, triggering of sources, recording of
`seismic waves sequentially in time from each
`excitation point, and processing of the
`seismograms,charaeterize din
`t h at , in order to improve the efficiency of the
`operation, a sequence of signals is formed
`corresponding to random numbers distributed
`independently and with equal probability in the
`interval bounded on the left by the magnitude
`of the correlation interval of seismograms from
`different excitation points, and the right — by
`one-half of the length of the seismograrn from
`one excitation point; sources are triggered using
`in sequence groups of P signals as source
`triggering delays for P excitation points on
`each of the lines, While the Waves are
`continuously recorded from all P points of each
`excitation profile, and source triggering times
`are stored and used in processing.
`
`it?
`
`,,
`
`WG-PGS00110382
`
`WesternGeco Ex. 1005, pg. 7
`
`

`
`1543357
`
`Editor A. Lezhnina
`
`Compiled by S. Kolesov
`Tech. Editor M L.Serdy11koVa
`
`Proofreader A. Obruchar
`
`by Subscription
`414
`Circulation
`Order No. 399
`VNNIIPI State Committee for Inventions and Discoveries at GKNT USSR
`
`113035, Moscow, Zh-35, 4/5 Raushskaya Embankment
`Publishing and Production Plant Patent, Uzhgorod, 101 Gagarin Str.
`
`WG-PGS00110383
`
`WesternGeco Ex. 1005, pg. 8
`
`

`
`‘ivE‘:"E%fi‘Ti%':§-..;%Pfi$%-§1:E‘-‘H-E‘-.;‘f’f£-':”£:-(
`
`City of New York, State ofNew York, County of New York
`
`I, Artem Furman, hereby affinn that the following is to the best of my knowledge
`and belief, a true and accurate Translation from Russian to English of the document
`“SU l543357Al”.
`
`‘ 1"
`
`.,
`
`Artem Furman
`
`TransPerfect Translations International, Inc.
`
`Sworn to before me this
`
`March 11, 2014
`
`otary Public
`Signature,
`-
`'
`4 ..«... .: ..«;
`.,-‘i’~'--~.v.-
`
`-
`
`' RYAN ALEXANDER DROS’? E
`; Notary Public-=State of New York
`3'
`‘
`,
`No. 01DR6262048
`’ Qualified in NEW YORK County V
`My Commission Expires MAY 21, 2016 ’
`
`Stamp, Notary Public
`
`‘N--EFAEZE PARK AVENUE, 3€:"3"H FLOOR, NEW YORK. NY i(50’is§ T 4-l 212.689 5555
`
`F H ?.‘i2.68‘9.'3'€.’E5?
`
`E.EGAi..TR/>.N5F‘ERFECT.CC3M
`
`WG-PGS00110384
`
`WesternGeco Ex. 1005, pg. 9