- journal_title：Geophysics
- Contributor：Hassan Masoomzadeh ; Penny J. Barton ; Satish C. Singh
- Publisher：Society of Exploration Geophysicists
- Date：2010-
- Format：text/html
- Language：en
- Identifier：10.1190/1.3443579
- journal_abbrev：Geophysics
- issn：0016-8033
- volume：75
- issue：4
- firstpage：R83
- section：SEISMIC INVERSION
We have developed a pragmatic new processing strategy to enhance seismic information obtained from long-offset multichannel seismic data. The conventional processing approach, which treats data on a sample-by-sample basis, is applied at a coarser scale on groups of samples. Using this approach, a reflected event and its vicinity remain unstretched during the normal moveout correction. Isomoveout curves (lines of equal moveout) in the time-velocity panel are employed to apply a constant moveout correction to selected individual events, leading to a nonstretch stack. A zigzag stacking-velocity function is introduced as a combination of segments of appropriate isomoveout curves. By employing a zigzag velocity function, stretching of key events is avoided and thus information at far offset is preserved in the stack. The method is also computationally cost-effective. However, the zigzag stacking-velocity field must be consistent with target horizons. This method of horizon-consistent nonstretch moveout has been applied to a wide-angle data set from the North Atlantic margin, providing improved images of the basement interface, which was previously poorly imaged.