dc.contributor.author | Steeples, Don W. | |
dc.contributor.author | Miller, Richard D. | |
dc.contributor.author | Black, Ross A. | |
dc.date.accessioned | 2007-09-18T15:18:34Z | |
dc.date.available | 2007-09-18T15:18:34Z | |
dc.date.issued | 1990-06 | |
dc.identifier.citation | GEOPHYSICS, VOL. 55, NO. 6 (JUNE 1990); P. 769-775, 10 FIGS. | en |
dc.identifier.uri | http://hdl.handle.net/1808/1687 | |
dc.description.abstract | Shallow seismic reflection surveys can assist in determination of velocity and/or thickness variations in nearsurface layers. Static corrections to seismic reflection data compensate for velocity and thickness variations within the "weathered zone." An uncompensated weathered-layer thickness variation on the order of 1 m across the length of a geophone array can distort the spectrum of the signal and result in aberrations on final stacked data. P-wave velocities in areas where the weathered zone is composed of unconsolidated materials can be substantially less than the velocity of sound in air. Weathered-layer thickness variation of 1 m in these low-velocity materials could result in a static anomaly in excess of 3 ms. Shallow-reflection data from the Texas panhandle illustrate a real geologic situation with sufficient variability in the near surface to significantly affect seismic signal reflected from depths commonly targeted by conventional reflection surveys. Synthetic data approximating a conventional reflection survey combined with a weathered-layer model generated from shallow-reflection data show the possible dramatic static effects of alluvium. Shallow high-resolution reflection surveys can be used both to determine the severity of intra-array statics and to assist in the design of a filter to remove much of the distortion such statics cause on deeper reflection data. The static effects of unconsolidated materials can be even more dramatic on S-wave reflection surveys than on comparable P-wave surveys. | en |
dc.language.iso | en_US | en |
dc.publisher | Society of Exploration Geophysicists | en |
dc.subject | Shallow | |
dc.subject | Reflection | |
dc.subject | Seismic | |
dc.title | Static corrections from shallow-reflection surveys | en |
dc.type | Technical Report | |
kusw.oastatus | na | |
dc.subject.uri | http://id.worldcat.org/fast/1111272 | |
dc.subject.fast | Seismic reflection method | |
kusw.oapolicy | This item does not meet KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess | |