http://www.3dsymsam.nl/ Mon, 06 Sep 2010 05:01:17 +0200 FeedCreator 1.7.2-ppt DokuWiki http://www.3dsymsam.nl/lib/images/favicon.ico http://www.3dsymsam.nl/ http://www.3dsymsam.nl/doku.php?id=3dssd_overview&rev=1194218549&do=diff By Gijs J.O. Vermeer Overview of contents. Short summary Introduction 1. 2-D symmetric sampling Reprint of paper published in The Leading Edge, 1991. Discusses main points of my book “Seismic Wavefield Sampling”. 2. 3-D symmetric sampling Mon, 05 Nov 2007 00:22:29 +0200 http://www.3dsymsam.nl/doku.php?id=advice&rev=1194427204&do=diff The advice offered by 3DSymSam will be based on the 3D symmetric sampling theory developed by Gijs Vermeer and his colleagues when working at Shell's E&P lab. This theory allows to design 3D survey geometries with an emphasis on spatial continuity rather than on bin attributes. The design of a 3D survey may be split over three major steps: Wed, 07 Nov 2007 10:20:04 +0200 http://www.3dsymsam.nl/doku.php?id=adwweb&rev=1281254898&do=diff The software problem that existed for some time has been solved now. Please inform 3DSymSam (see Contact tab) of any problems in using this Wizard. 3DSymSam's Acquisition Design Wizard (ADW) is meant as an assistant to the design of 3D seismic surveys. Originally, the ADW was developed by TNO-NITG (now TNO Built Environment and Geosciences), TNO, on basis of specifications written by Gijs Vermeer. This web version is to a large extent the same as the old one, with some improvements and modifica… Sun, 08 Aug 2010 10:08:18 +0200 http://www.3dsymsam.nl/doku.php?id=biography&rev=1275032682&do=diff Gijs Vermeer received an MSc in Applied Mathematics from the Technological University of Delft (TUD) in 1965. After military service he joined Shell Research where he carried out seismic processing research, followed by eight years of seismic processing in Shell Expro (London) and NAM (The Netherlands). After another seven years in research, now on seismic interpretation, Gijs joined Shell Canada in 1988, where he was involved in stratigraphic interpretation of carbonate reefs. In 1991 he went b… Fri, 28 May 2010 09:44:42 +0200 http://www.3dsymsam.nl/doku.php?id=contact&rev=1225041669&do=diff 3DSymSam - Geophysical Advice Zieltjes 28 8375 CN Oldemarkt The Netherlands Tel. +31 561 450808 Fax. +31 561 450951 Email: <gijs@3dsymsam.nl> Sun, 26 Oct 2008 18:21:09 +0200 http://www.3dsymsam.nl/doku.php?id=courses&rev=1261227157&do=diff Although courses are still part of the portfolio of 3DSymSam, it will only be possible in very special cases to arrange a five-day course. An overview of this five-day course is given in a two-page [brochure]. Each subject listed in the brochure is described in more detail in Vermeer's “3-D seismic survey design” published by the SEG. This book is used as reference material for the course. Most material presented at the course is also covered in the book. You may have a look at an overview of t… Sat, 19 Dec 2009 13:52:37 +0200 http://www.3dsymsam.nl/doku.php?id=menu&rev=1233087357&do=diff * Home * Advice * Courses * Publications * Design Wizard * Discussions * Biography * Contact Tue, 27 Jan 2009 21:15:57 +0200 http://www.3dsymsam.nl/doku.php?id=news_archive&rev=1273173459&do=diff July 2008 From time to time it is argued that cable-free systems would bring freedom in the choice of receiver station locations. To learn how this is viewed in the light of 3D symmetric sampling requirements, read the note ["Noise suppression, prestack imaging and freedom of choice"]. Thu, 06 May 2010 21:17:39 +0200 http://www.3dsymsam.nl/doku.php?id=start&rev=1277288581&do=diff 3DSymSam - Geophysical Advice provides advice on 3D seismic survey design based on 3D symmetric sampling theory and offers courses on 3D seismic wavefield sampling and various acquisition techniques. This website also contains some contributions to current and past geophysical discussions. Wed, 23 Jun 2010 12:23:01 +0200 http://www.3dsymsam.nl/doku.php?id=sws&rev=1194197669&do=diff NOMENCLATURE ACKNOWLEDGMENTS PREFACE 1. INTRODUCTION 2. SPATIAL CONSIDERATIONS 3. THE CONTINUOUS WAVEFIELD 3.1 The shot/receiver- and midpoint/offset-coordinate systems 3.2 Various cross-sections 3.3 Apparent velocity in various subspaces 3.4 The reciprocity theorem 3.5 Minimum apparent velocity 3.6 Transforms of the continuous wavefield 3.6.1 Wavenumber transforms 3.6.2 (tau,p) transforms 3.7 The energy distribution of the continuous wavefield 3.8… Sun, 04 Nov 2007 18:34:29 +0200