The vertical seismic profiling (VSP) Gaussian beam migration is a imaging method with both computational efficiency and precision. It can get high-resolution structural features near the well. However, VSP based on primary reflection limited by observation system, which makes it unable to image for shallow structure at far offset. free-surface multiples in expand illumination range offset effec...

Geophysical techniques coupled with the modern computer workstation have not been widely used in environmental geology. The Kansas Geological Survey is investigating the application of the computer workstation in a number of projects underway that involve environmental questions and problems associated with salt dissolution. The computer workstation provides an efficient approach to integrate g...

s, 1139–1142. Grechka, V., Mateeva, A., Gentry, C., Jorgensen, P, Lopez, P. and Franco, G. [2007] Estimation of seismic anisotropy from P-wave VSP data. The Leading Edge, 26(6), 756–759. Hudson, J.A. [1981] Wave speeds and attenuation of seismic waves in materialc containing cracks. Geophysical Journal of the Royal Astronomical Society, 64, 133–150. CC02339-MA009 Seabird Exploration.indd 10...

I realize and analyze a model-based joint tomography scheme in this paper. Surface reflection seismic data and VSP traveltimes are used simultaneously to invert the velocity by using an integrated inversion scheme. Since more data are used, the integrated tomography can obtain more accurate inversion results with lower uncertainty. Using identity operator as integration operator, I apply this m...

I present the equations for migrating IVSPWD (inverse VSP while drilling) autocorrelograms. These equations extend the Katz IVSPWD method to 2-D and 3-D media, and also provide a formal mathematical justification for inverting the reflectivity distribution from IVSPWD autocorrelograms. In addition, I describe a new imaging condition which images the primary-reflection energy compared to the Kat...

Estimation of rock properties from seismic data is important for exploration and production activities in the petroleum industry. Considering compressional velocity—the speed propagating body waves formations—and quality factor (Q)—a measure frequency-selective energy losses through formations—both are usually estimated multichannel data. Velocity during processing reflection either time or dep...

A comprehensive set of downhole measurements was collected in the AND-1B drillhole as part of the on-ice scientifi c programme defi ned for the McMurdo Ice Shelf (MIS) Project. Geophysical logs were recorded over two operation phases and consisted of calliper, temperature, fl uid conductivity, induction resistivity, magnetic susceptibility, natural gamma activity, acoustic televiewer, borehole ...

SUMMARY Use and interpretation of wireline lookahead VSP combined with LWD seismic while drilling and LWD sonic log for base of salt prediction, a case study offshore Brasil deep offshore Campos. It aimed to assist drilling decisions by obtaining a more accurate prediction of Base of Salt depth. Setting the 9-5/8" casing point was key from a drilling perspective.