We present a multidimensional multiple‐attenuation method that does not require any subsurface information for either surface or internal multiples. To derive these algorithms, we start with scattering theory description of seismic data. then introduce and develop several new theoretical concepts concerning the fundamental nature relationship between forward inverse scattering. These include (1) idea inversion process can be viewed as series steps, each specific task; (2) realization...

This paper presents an overview and a detailed description of the key logic steps mathematical-physics framework behind development practical algorithms for seismic exploration derived from inverse scattering series.

Seismic migration and inversion describe a class of closely related processes sharing common objectives underlying physical principles. These range in complexity from the simple NMO‐stack to complex, iterative, multidimensional, prestack, nonlinear used elastic seismic case. By making use amplitudes versus offset, it is, principle, possible determine three parameters compressional data. can be modified solve for these parameters, as prestack migration. Linearized, wave‐equation does not...

This paper is an overview of the current state multiple attenuation and developments that we might anticipate in near future. The basic model seismic processing assumes reflection data consist primaries only. If multiples are not removed, they can be misinterpreted as, or interfere with, primaries. a longstanding only partially solved problem exploration seismology. Many methods exist to remove multiples, useful when their assumptions prerequisites satisfied. However, there also many...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1994Inverse scattering series for multiple attenuation: An example with surface and internal multiplesAuthors: Fernanda V. AraújoArthur B. WegleinPaulo Marcus CarvalhoR. H. StoltFernanda AraújoPPPG/Federal University of Bahia, Arthur WegleinSchlumberger Cambridge Research, Paulo CarvalhoPterobrá SA, R. StoltConocohttps://doi.org/10.1190/1.1822691 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack...

We report the first use of Green's theorem derived source and receiver deghosting on deep water Gulf Mexico synthetic (SEAM) field data. has several qualities which separate it from previous methods: (1) accommodates a multi-dimensional earth, (2) doesn't require Fourier transform over space coordinates, (3) works in every depth water, (4) allows for any shape measurement surface (e.g., corrugated bottom), (5) is consistent with wave theory processing methods. The context placed within...

Amplitude variation with offset (AVO) analysis is often limited to areas where multidimensional propagation effects such as reflector dip and diffractions from faults can be ignored. Migration‐inversion provides a framework for extending the use of seismic amplitudes structural or stratigraphic are important. In this procedure, sources receivers downward continued into earth using uncollapsed prestack migration. Instead stacking data in normal migration, migrated used AVO other inversion...

A new and general wave theoretical wavelet estimation method is derived. Knowing the seismic important both for processing data modeling response. To obtain wavelet, statistical (e.g., Wiener‐Levinson) deterministic (matching surface to well‐log data) methods are generally used. In marine case, a far‐field signature often obtained with deep‐towed hydrophone. The do not allow obtaining phase of whereas obviously requires from well. hydrophone that water be deep enough in far field addition...

Almost every link in the chain of exploration seismology methods used to process recorded data has been affected by Green’s theorem. Among seismic processes that can be related to, and/or have benefited from, theorem are wavelet estimation, multiple elimination, regularization, redatuming, imaging, deghosting, and interferometry. This tutorial on various derived from emphasizes reconstruction (including regularization redatuming) its relationship interferometry as well estimation wavefield...

Despite the explosion of new, innovative technologies in area multiple identification and subsequent attenuation, their applicability is mostly limited to marine environments especially deep water. In land seismic data sets however, application such multiple-elimination methodologies not always straightforward many cases poor results are obtained. The unique characteristics (i.e., noise, statics coupling) major obstacles estimation elimination. well-defined surface multiples present rarely...

Migration and migration inversion are the seismic processing methods for structural determination subsequent amplitude analysis, respectively. To date, most well-founded physically interpretable method is based on predicting a coincident source receiver experiment at depth time equals zero. We have extended that heterogeneous media to accommodate two-way propagation in local sense every point from target reflector back global sense, separately each of two legs receiver. That provides first...

We present a formalism for obtaining the subsurface velocity configuration directly from reflection seismic data. Our approach is to apply results obtained inverse problems in quantum scattering theory problem. In particular, we extend of Moses (1956) and Razavy (1975) one‐dimensional (1-D) identification acoustic wave equation problem identifying three‐dimensional (3-D) boundary value measurements. No priori knowledge assumed all refraction, diffraction, multiple phenomena are taken into...

A central purpose of this article is to bring an alternative voice, perspective, and understanding the latest geophysical stampede, technical bubble, self-proclaimed seismic cure-all, so-called “full-waveform inversion” or FWI. If you think exaggerated, I refer advertisement/announcement 2013 SEG Workshop on FWI whose opening line is, “Full-waveform inversion has emerged as final ultimate solution Earth resolution imaging objective.”

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1991Examples of a nonlinear inversion method based on the T matrix scattering theory: Application to multiple suppressionAuthors: F. M. CarvalhoA. B. WegleinR. H. StoltF. CarvalhoPPPG/Federal Univ. Bahia and Petrobras, Brazil, A. WegleinARCO Oil Gas, R. StoltConoco Inc.https://doi.org/10.1190/1.1889114 SectionsAboutPDF/ePub ToolsAdd favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail...

Arbitrary multi-dimensional distributions of two absorptive–dispersive acoustic medium parameters (P-wave velocity and Q) may be determined to first order from reflected seismic primary data with an inverse scattering formulation. The problem can considered a form Q-estimation, but one that distinguishes itself by using the dispersive reflection coefficient as its source information. If overburden above target characterized is known, synthetic Q estimates are successfully derived, albeit...

A task-specific, multiparameter (more than one mechanical property changes across a reflector), direct nonlinear inversion subseries of the inverse-scattering series is derived and tested for an acoustic medium in which velocity density vary vertically. Task-specific means that terms distinct corresponding to tasks imaging only are identified separated. Direct there formulas solve explicitly output physical properties, without, e.g., search algorithms, model matching optimization schemes,...

Multiple removal is a longstanding problem in exploration seismology. Although methods for removing multiples have advanced and become more effective, the concomitant industry trend toward complex areas difficult plays has often outpaced advances multiple-attenuation technology. The topic of multiples, developing ever effective their removal, remains high terms interest, priority research investment. question as to whether today, 2011, or multiple winning way describing what we are about...

Receiver-side deghosting can be derived and implemented in the frequency domain as spatial deterministic deconvolution of marine pressure recordings. The deghosting/deconvolution operator is found analytically inverse Fourier transform wavenumber-domain wave equation function. For a sea surface reflection coefficient [Formula: see text], function has well-known poles at fundamental frequencies equal to an integer multiple receiver depth plane-wave dip angle relative axis. first singularity...

The estimation of the source signature is often one necessary first steps in processing seismic reflection data, especially if chain includes prestack multiple removal. However, most methods for are based on poststack data or assume that earth 1-D. In this work, a new method presented. It consists finding permits removal events attributable to first‐order free‐surface reflections (i.e., multiples). exploits formulation relationship between and as scattering Born series. formulation, order...

A procedure is derived which incorporates a generalized linear inverse viewpoint within multidimensional Born inversion method. The method we present more general theory can accommodate insufficient and inaccurate data. This reduces to the ordinary when data requirements of latter technique are satisfied.

Linear inversion is defined as the linear approximation of a direct-inverse solution. This definition leads to data requirements and specific algorithms, which differ with all current nonlinear approaches, immediately relevant for target identification in an elastic earth. Common practice typically starts direct forward or modeling expression seeks solve equation inverse sense. Attempting problem sense not same solving directly. Distinctions include differences need priori information,...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1996Internal multiple attenuation using inverse scattering: Results from prestack 1 & 2D acoustic and elastic syntheticsAuthors: R. T. CoatesA. B. WegleinR. CoatesSchlumberger Cambridge Research A. WegleinArco Exploration Production Technologyhttps://doi.org/10.1190/1.1826408 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink:...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2002New approaches to deghosting towed‐streamer and ocean‐bottom pressure measurementsAuthors: A. B. WegleinS. ShawK. H. MatsonJ. L. SheimanR. StoltT. TanA. OsenG. P. CorreaK. InnanenZ. GuoJ. ZhangA. WegleinUniversity of Houston, TX, S. ShawBP, K. MatsonBP, J. SheimanShell, R. StoltConoco, Ponca City, OK, T. TanShell, OsenStatoil, Stavanger, Norway, G. CorreaUniversity InnanenUniversity British Columbia, Vancouver, BC, Z....