TY - GEN
T1 - High resolution quantitative seabed mapping
T2 - 81st EAGE Conference and Exhibition 2019 Workshop Programme
AU - Holland, C. W.
AU - Belcourt, J.
AU - Dosso, S.
AU - Dettmer, J.
PY - 2019/6/3
Y1 - 2019/6/3
N2 - The frequency-domain reflection coefficient contains high information content on seabed properties. In addition to the usual angular domain features of the critical angle and the angle of intromission, the frequency-domain reflection coefficient exhibits Bragg resonances from up- and down-going waves in individual layers and between individual layers. It is the Bragg resonances that contain the highest quantitative seabed information. By using a full-physics forward model (the Sommerfeld integral), a sophisticated and causal sediment acoustics model (Viscous Grain Shearing theory), and a trans-dimensional inversion framework, high resolution (vertical and horizontal) estimates of seabed geotechnical and geophysical properties can be obtained along with rigorous uncertainties. The seabed properties are compared with independent (i.e., not used as a priori information to constrain the inversion results) core measurements. The two measurements of the seabed properties generally agree quite closely.
AB - The frequency-domain reflection coefficient contains high information content on seabed properties. In addition to the usual angular domain features of the critical angle and the angle of intromission, the frequency-domain reflection coefficient exhibits Bragg resonances from up- and down-going waves in individual layers and between individual layers. It is the Bragg resonances that contain the highest quantitative seabed information. By using a full-physics forward model (the Sommerfeld integral), a sophisticated and causal sediment acoustics model (Viscous Grain Shearing theory), and a trans-dimensional inversion framework, high resolution (vertical and horizontal) estimates of seabed geotechnical and geophysical properties can be obtained along with rigorous uncertainties. The seabed properties are compared with independent (i.e., not used as a priori information to constrain the inversion results) core measurements. The two measurements of the seabed properties generally agree quite closely.
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U2 - 10.3997/2214-4609.201901928
DO - 10.3997/2214-4609.201901928
M3 - Conference contribution
T3 - 81st EAGE Conference and Exhibition 2019 Workshop Programme
BT - 81st EAGE Conference and Exhibition 2019 Workshop Programme
PB - EAGE Publishing BV
Y2 - 3 June 2019 through 6 June 2019
ER -