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| The nonuniformity coefficient analysis for offset attribute |
| Zhao Hu1, Yin Cheng1, Chen Guang-ming2, Li Xuan-bo2 |
1. School of Resources and Environment,Southwest University of Petroleum,Chengdu City,Sichuan Province,610500,China;
2. Geophysical Exploration Company,Chuanqing Drilling Corporation,Chengdu City,Sichuan Province,610213,China |
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Abstract Offset uniform distribution is always the goal in geometry designing for seismic acquisition as the offset distribution has severe influence to velocity analysis and stacking imaging precision.Nowadays our main tool to evaluate a geometry designing and to conduct qualitative analysis for the performance of the geometry is the offset distribution attribute map.In this paper by linking the offset distribution and folds/maximum offset,the quantitative analysis formula and the nonuniformity coefficient new concept were introduced,and they are used to describe the offset uniformity status for each bin.By conducting analysis of offset nonuniformity coefficient for 4 kinds of track group recording geometry and orthogonal geometry with different aspect ratios,the most evenly distributed geometry was quantitatively derived,providing the new method and means for geometry designing in seismic acquisition.
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Received: 03 August 2009
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2011, Vol. 46 
