Zobrazeno 1 - 10
of 56
pro vyhledávání: '"R. James Brown"'
Publikováno v:
GEOPHYSICS. 84:B1-B14
Using 3D broadband seismic data, we have investigated low-frequency seismic amplitude anomalies associated with and below various geologic formations in the Johan Sverdrup oil field situated in the central North Sea. Low-frequency anomalies are obser
Publikováno v:
GEOPHYSICS. 82:N51-N60
Our aim was to identify some of the characteristics of low-frequency anomalies. Specifically, we have looked, in 3D broadband data from the North Sea, for any offset dependence in these anomalies and any frequency-related change in normal moveout (NM
Publikováno v:
Proceedings of the Water Environment Federation. 2013:12-21
Autor:
R. James Brown, Bilal Ahmed Bhatti
Publikováno v:
SEG Technical Program Expanded Abstracts 2016.
Publikováno v:
Geophysical Prospecting. 61:168-186
The main objective of this work is to establish the applicability of shallow surfaceseismic traveltime tomography in basalt-covered areas. A densely sampled ∼1300-m long surface seismic profile, acquired as part of the SeiFaBa project in 2003 (Japs
Autor:
R. James Brown
Publikováno v:
GEOPHYSICS. 75:Q11-Q20
In four-component (4-C) towed ocean-bottom-cable (OBC) data sets, acquisition footprints are often observed. Sometimes these exhibit a spatial period equal to the length of the receiver cable. I have analyzed a 2D 4-C OBC data set, looking at common-
Autor:
John Hodgkinson, R. James Brown
Publikováno v:
GEOPHYSICS. 70:D19-D28
Assuming elliptical wavefronts, we reformulate refraction theory for transversely isotropic (TI) media based on the use of the auxiliary angle, α, which is intermediate between the phase angle, θ, and the group angle, ϕ. When considering the appli
Publikováno v:
Geophysical Prospecting. 51:131-140
We present a method for calculating the anisotropy parameter of a buried layer by inverting the total traveltimes of direct arrivals travelling from a surface source to a well-bore receiver in a vertical seismic profiling (VSP) geometry. The method a
Publikováno v:
GEOPHYSICS. 68:40-57
Converted seismic waves (specifically, downgoing P‐waves that convert on reflection to upcoming S‐waves are increasingly being used to explore for subsurface targets. Rapid advancements in both land and marine multicomponent acquisition and proce