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start [2009/03/16 15:21] 3dsymsam |
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| ====== 3DSymSam - Geophysical Advice ====== | ====== 3DSymSam - Geophysical Advice ====== | ||
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| **This website also contains some contributions to current and past geophysical [[discussions:start|discussions]].** | **This website also contains some contributions to current and past geophysical [[discussions:start|discussions]].** | ||
| - | **In October 2002 the SEG published "3-D seismic survey design" by Gijs J.O. Vermeer. This book is a slightly modified version of Vermeer's PhD thesis, which was published early 2001. The Leading Edge of May 2003 published a {{review3ddesign.pdf|rave review}} of the book. A Chinese translation appeared in 2008 (see picture below).** | + | **In October 2002 the SEG published "3-D seismic survey design" by Gijs J.O. Vermeer. This book is a slightly modified version of Vermeer's PhD thesis, which was published early 2001. The Leading Edge of May 2003 published a {{review3ddesign.pdf|rave review}} of the book. A Chinese translation appeared in 2008.** |
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| ====== News ====== | ====== News ====== | ||
| + | {{zieltjes 28.jpg?600|huis aan het water}} | ||
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| + | //Dit huis in Oldemarkt met schitterend uitzicht over water en weilanden is te koop. Zie voor meer foto's [[http://www.mijnalbum.nl/Album=URTLWL64|Zieltjes 28]], [[http://www.vbo.nl/objectdetail.aspx?dt=612869|Beschrijving]], [[http://www.vbowonenenzo.nl/content.asp?id=514|Webmagazine]]. This house in Oldemarkt with a spectacular view across water and farmland is for sale. More pictures at [[http://www.mijnalbum.nl/Album=URTLWL64|Zieltjes 28]].// | ||
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| + | <span style="display:none">Huis te Koop, Wonen aan het water, Weerribben, Kop van Overijssel, Oldemarkt, vrijstaande woning, open vaarwater </span> | ||
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| + | =====June 2010===== | ||
| + | ====Highlights Barcelona '10==== | ||
| + | Some points of interest on the 2010 EAGE Conference in Barcelona are listed in {{highlights_barcelona.pdf|Barcelona}}. | ||
| =====February 2009===== | =====February 2009===== | ||
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| - | ===== 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 {{freedom of choice.pdf|"Noise suppression, prestack imaging and freedom of choice"}}. | ||
| - | ===== January 2008 ===== | ||
| - | NMO stretch has an effect on the resolution of final stacked and migrated data that depends on the mix of offsets contributing to the final product. For the same range of absolute offsets, 2D data are less affected by resolution loss than 3D data. This is discussed in the note {{nmostretch.pdf|"NMO stretch for P- and C-waves and its link to resolution, AVO and mute offset"}}.\\ | ||
| - | The note also discusses the link between AVO-requirements and NMO stretch, the link between mute offset as a function of depth and NMO stretch, and the note describes NMO stretch for C-waves.\\ | ||
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| - | ===== November 2007 ===== | ||
| - | Wide-azimuth towed streamer (WATS) acquisition is a new technique with potential for better subsalt imaging. It is a highly expensive technique, because it involves traversing the survey area multiple times with varying crossline offsets between streamer vessel and source vessels. The expense of the technique has led to undesirable corner cutting such as acquiring data in only two of the four source-receiver azimuth quadrants. In some papers this cost-saving method has been justified on basis of reciprocity: reciprocity would make data acquired in opposite quadrants redundant.\\ | ||
| - | The paper {{reciprocal_offset-vector_tiles.pdf|"Reciprocal offset-vector tiles in various acquisition geometries"}} presented at the 2007 SEG Conference held in San Antonio, Texas, argues that in sparse geometries data acquired in opposite quadrants are complementary rather than redundant.\\ | ||
| - | The Power Point file of the paper as presented at the Conference can be viewed {{reciprocal_offset-vector_tiles.ppt|here}} as well (including presentation text in Notes pages). | ||
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| [[news_archive|The News Archive is located here.]] | [[news_archive|The News Archive is located here.]] | ||
| - | {{chinese_book.jpg?300|}} | ||
| - | //Peiming Li (left) of BGP just handed a copy of the Chinese translation of "3-D seismic survey design" to Gijs Vermeer. Venue: SEG Pavillion at SEG Conference, Las Vegas, November 2008.// | ||