TY - GEN
T1 - Migration Methods with Curved Coordinate Systems
AU - Negrete, Sergio Sanes
AU - Munoz-Cuartas, Juan C.
AU - Van Dongen, Koen W.A.
PY - 2021
Y1 - 2021
N2 - Reverse time migration (RTM) is a method developed for performing non-invasive physical imaging. It aims to generate diagnostic images based on forward and backward modeling of waves, which can be solved with different type of techniques. A widely used one is Finite Differences (FD) due to its low computational cost and its simplicity, as compared to other methods, to implement. In this work we show how to implement RTM with curved coordinates using FD. In particular we focus on the application of curved coordinates to improve the quality of the resulting images and reduce the computational cost of RTM. Here, we apply a strategy to curve coordinates during the wave propagation modeling stage for a modified version of the Marmousi model. The results show that it is completely feasible the redistribution of grid nodes to locally improve quality of the migrated models and reduce the number of grid nodes at the same time. We also found that typical issues associated to the imaging condition and FD scheme remain.
AB - Reverse time migration (RTM) is a method developed for performing non-invasive physical imaging. It aims to generate diagnostic images based on forward and backward modeling of waves, which can be solved with different type of techniques. A widely used one is Finite Differences (FD) due to its low computational cost and its simplicity, as compared to other methods, to implement. In this work we show how to implement RTM with curved coordinates using FD. In particular we focus on the application of curved coordinates to improve the quality of the resulting images and reduce the computational cost of RTM. Here, we apply a strategy to curve coordinates during the wave propagation modeling stage for a modified version of the Marmousi model. The results show that it is completely feasible the redistribution of grid nodes to locally improve quality of the migrated models and reduce the number of grid nodes at the same time. We also found that typical issues associated to the imaging condition and FD scheme remain.
KW - Acoustic Wave Equation
KW - Differential Geometry
KW - Finite Difference
KW - Generalized Coordinates
KW - Migration
KW - Time Domain
UR - http://www.scopus.com/inward/record.url?scp=85124148467&partnerID=8YFLogxK
U2 - 10.1109/LAUS53676.2021.9639221
DO - 10.1109/LAUS53676.2021.9639221
M3 - Conference contribution
AN - SCOPUS:85124148467
T3 - LAUS 2021 - 2021 IEEE UFFC Latin America Ultrasonics Symposium, Proceedings
BT - LAUS 2021 - 2021 IEEE UFFC Latin America Ultrasonics Symposium, Proceedings
A2 - Kamimura, Hermes
A2 - Lavarello, Roberto
PB - Institute of Electrical and Electronics Engineers (IEEE)
T2 - 2021 IEEE UFFC Latin America Ultrasonics Symposium, LAUS 2021
Y2 - 4 October 2021 through 5 October 2021
ER -