Marine controlled source electromagnetic study of methane seeps and gas hydrates at Opouawe Bank, Hikurangi Margin, New Zealand
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Geophysical Research"
DOI: 10.1002/2016jb013702
Abstract: Marine controlled source electromagnetic (CSEM) data have been collected to investigate methane seep sites and associated gas hydrate deposits at Opouawe Bank on the southern tip of the Hikurangi Margin, New Zealand. The bank is… read more here.
Keywords: marine controlled; gas; methane; hydrate ... See more keywords
Finite Element Simulation of 3-D Marine Controlled Source Electromagnetic Fields in Anisotropic Media with Unstructured Tetrahedral Grids
Sign Up to like & getrecommendations! Published in 2020 at "Pure and Applied Geophysics"
DOI: 10.1007/s00024-020-02514-z
Abstract: Marine controlled-source electromagnetic (CSEM) method has proved to be a powerful tool and found its increasing applications for offshore resource exploration and tectonic studies. However, bathymetric variations and anisotropic structures encountered in practical measurements have… read more here.
Keywords: marine csem; marine controlled; marine; bathymetry ... See more keywords
Study of a Permafrost Area in the Northern Part of Siberia Using Controlled Source Radiomagnetotellurics
Sign Up to like & getrecommendations! Published in 2020 at "Pure and Applied Geophysics"
DOI: 10.1007/s00024-020-02621-x
Abstract: Controlled source radiomagnetotelluric (CSRMT) measurements with a horizontal electrical dipole were carried out for the planned construction of a railway bridge in the Northern part of Siberia (the Yamalo-Nenets region). The aim of this survey… read more here.
Keywords: northern part; source; area; controlled source ... See more keywords
Controlled-source electromagnetic data processing based on gray system theory and robust estimation
Sign Up to like & getrecommendations! Published in 2017 at "Applied Geophysics"
DOI: 10.1007/s11770-017-0646-5
Abstract: We propose a novel method that combines gray system theory and robust M-estimation method to suppress the interference in controlled-source electromagnetic data. We estimate the standard deviation of the data using a gray model because… read more here.
Keywords: robust estimation; gray system; method; source electromagnetic ... See more keywords
Comparison of structured and unstructured grids in marine controlled source electromagnetic inversions for offshore hydrocarbon exploration
Sign Up to like & getrecommendations! Published in 2019 at "Marine and Petroleum Geology"
DOI: 10.1016/j.marpetgeo.2018.11.008
Abstract: Abstract The grid chosen for marine controlled-source electromagnetic forward modeling and inversion is important because it affects the accuracy and efficiency of the latter. Providing these kinds of results is particularly difficult for offshore exploration.… read more here.
Keywords: marine controlled; source electromagnetic; controlled source; geometry ... See more keywords
Study on gas hydrate targets in the Danube Paleo-Delta with a dual polarization controlled-source electromagnetic system
Sign Up to like & getrecommendations! Published in 2021 at "Marine and Petroleum Geology"
DOI: 10.1016/j.marpetgeo.2021.105330
Abstract: Abstract The Black Sea is known to have extensive direct and indirect indicators of methane hydrates. Since the resistivity of the seafloor increases significantly in the presence of gas hydrates or free gas, marine controlled-source… read more here.
Keywords: system; danube paleo; gas; paleo delta ... See more keywords
Robust data processing of noisy marine controlled-source electromagnetic data using independent component analysis
Sign Up to like & getrecommendations! Published in 2017 at "Exploration Geophysics"
DOI: 10.1071/eg17139
Abstract: Data processing techniques are often used to estimate the noise-free response of marine controlled-source electromagnetic (CSEM) data and magnetotelluric transfer functions. We have implemented a new CSEM data processing scheme that uses a robust method… read more here.
Keywords: csem data; data processing; independent component; source electromagnetic ... See more keywords
3D imaging of the Balmuccia peridotite body (Ivrea-Verbano zone, NW-Italy) using controlled source seismic data
Sign Up to like & getrecommendations! Published in 2023 at "Geophysical Journal International"
DOI: 10.1093/gji/ggad182
Abstract: We provide new results from a controlled-source seismic experiment on the deepest part of the Val Sesia crust-mantle section of the Ivrea Verbano zone (IVZ) in the Italian Alps. The IVZ is a tilted, almost… read more here.
Keywords: zone; controlled source; source seismic; balmuccia peridotite ... See more keywords
Parallel 3-D marine controlled-source electromagnetic modelling using high-order tetrahedral Nédélec elements
Sign Up to like & getrecommendations! Published in 2019 at "Geophysical Journal International"
DOI: 10.1093/gji/ggz285
Abstract: We present a parallel and high-order Nédélec finite element solution for the marine controlled-source electromagnetic (CSEM) forward problem in 3-D media with isotropic conductivity. Our parallel Python code is implemented on unstructured tetrahedral meshes, which… read more here.
Keywords: marine controlled; source electromagnetic; order; controlled source ... See more keywords
Fast 3-D Controlled-Source Electromagnetic Modeling Combining UPML and Rational Krylov Method
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Geoscience and Remote Sensing Letters"
DOI: 10.1109/lgrs.2022.3162695
Abstract: Controlled-source electromagnetic (CSEM) surveying is a critical tool for sensing and locating underground anomalies and structures. In this letter, based on uniaxial perfectly matched layer (UPML) and rational Krylov (RK) method, we propose a fast… read more here.
Keywords: upml rational; rational krylov; controlled source; krylov method ... See more keywords
Accelerating the Frequency Domain Controlled-Source Electromagnetic Data Inversion Using Rational Krylov Subspace Algorithm
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2022.3183838
Abstract: Controlled-source electromagnetic (CSEM) method is crucial for detecting and locating underground anomalies and structures. However, it is challenging to interpret the field data with multifrequency via 3-D CSEM inversion. To fully excavate and utilize the… read more here.
Keywords: rational krylov; inversion; controlled source; krylov subspace ... See more keywords