| dc.contributor.author | Cheng, C. H. | |
| dc.contributor.other | Massachusetts Institute of Technology. Earth Resources Laboratory | en_US |
| dc.date.accessioned | 2012-12-03T15:59:30Z | |
| dc.date.available | 2012-12-03T15:59:30Z | |
| dc.date.issued | 1987 | |
| dc.identifier.uri | http://hdl.handle.net/1721.1/75136 | |
| dc.description.abstract | We present an indirect method of determining shear wave velocities from full waveform
acoustic logs based on the inversion of the spectral ratio of the P-wave trains at two
source-receiver separations. This method simultaneously inverts for the formation shear
wave velocity and compressional wave attenuation. The P-wave response is calculated
by means of branch-cut integration. This method is useful in "soft" formations where
the shear wave velocity is lower than the acoustic velocity of the borehole fluid and
thus there are no refracted shear wave or pseudo-Rayleigh wave arrivals. The method
is shown to give good estimates of formation shear wave velocity in both synthetic and
field data. The inversion algorithm is sensitive to local minima; care must be taken to
avoid them. | en_US |
| dc.description.sponsorship | Massachusetts Institute of Technology. Full Waveform Acoustic Logging Consortium | en_US |
| dc.description.sponsorship | National Science Foundation (U.S.) (Grant OCE84-08761) | en_US |
| dc.publisher | Massachusetts Institute of Technology. Earth Resources Laboratory | en_US |
| dc.relation.ispartofseries | Earth Resources Laboratory Industry Consortia Annual Report;1987-10 | |
| dc.title | Full Waveform Inversion of P Waves for V[subscript s] and Q[subscript p] | en_US |
| dc.type | Technical Report | en_US |
| dc.contributor.mitauthor | Cheng, C. H. | |
| dspace.orderedauthors | Cheng, C. H. | en_US |
