Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
The Leading Edge Email Content Delivery
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
The Leading Edge; September 2002; v. 21; no. 9; p. 902-905; DOI: 10.1190/1.1508955
© 2002 Society of Exploration Geophysicists
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Shaohua, Z.
Right arrow Articles by Xinwen, L.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Applying 3D seismic in a complex mountainous area of Tarim Basin

Zhang Shaohua, Yan Feng, Li Peiming, Li Zhenhua and Liu Xinwen

Bureau of Geophysical Prospecting, CNPC, China

Corresponding author: lishao@public.zz.ha.cn

The first 20% of the full text of this article appears below.

Complex surface and subsurface conditions in China's northern Tarim Basin make it impossible to record good 3D seismic data with conventional acquisition geometry. In addition, the thickness of the low-velocity layer varies from 3 to 150 m, making 3D static corrections a challenge.

To determine how to successfully record 3D data despite these obstacles, the Bureau of Geophysical Prospecting conducted a survey that combined regular and irregular acquisition geometry. For 3D static corrections, we carefully selected a control point for near-surface investigation, paid particular attention to the lithologic boundaries, and established an accurate near-surface model with the help of satellite data.

In an effort to evaluate oil and gas reserves of the KeLa 2 gas field in Tarim Basin, BGP geophysicists chose the Dina area as the testing ground. Structures in the Dina area are more complex than in the KeLa 2 gas field on the surface, near surface, and subsurface. Mountains, piedmont pluvial facies, and desert areas are present. Topography is rough and changes in the low-velocity zone can be dramatic both vertically and laterally (Figure 1).


Figure Removed (Available Only in the Full Text)
View larger version (97K):
[in this window]
[in a new window]
  		Figure 1. Satellite data (a) and thickness of low velocity zone (b).

 

   3D geometry design and performance
 
Nearly a third of the northern study area is covered by gullies, bluffs, and abruptly outcropping stuctures. As a result, many shots and receivers cannot be properly positioned in a regular 3D acquisition grid. On the other hand, using only an irregular recording geometry would make it very hard to . . . [Full Text of this Article]






JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Society of Exploration Geophysicists