IEEE geoscience and remote sensing letters, 2020-09, Vol.17 (9), p.1498-1502
2020
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Memory-Efficient 3-D LWD Solver With the Flipped Total Field/Scattered Field-Based DGFD Method
- Ist Teil von
- IEEE geoscience and remote sensing letters, 2020-09, Vol.17 (9), p.1498-1502
- Ort / Verlag
- Piscataway: IEEE
- Erscheinungsjahr
- 2020
- Quelle
- IEEE Xplore
- Beschreibungen/Notizen
- This letter presents a fast and memory-efficient 3-D electromagnetic solver for logging-while-drilling (LWD) tools based on the flipped total field/scattered field-based discontinuous Galerkin frequency-domain (TF/SF DGFD) method. The new method inherits the Riemann transmission condition (RTC) with surface current sources from the mixed TF/SF DGFD method to couple nonconformal meshes as well as TF/SF solvers; it then extends to the moving-tool scenarios for the LWD application with a solver flipping technology and delivers a single global matrix of dramatically reduced dimension for all source positions, which can be solved directly on a normal-memory computer. By incorporating the tetrahedral/hexahedral mixed mesh and the curved domain decomposition method, the new solver is applied to two LWD cases and about 70% of unknowns can be saved for the flipped TF/SF DGFD remeshed regions.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1545-598XeISSN: 1558-0571DOI: 10.1109/LGRS.2019.2950659Titel-ID: cdi_crossref_primary_10_1109_LGRS_2019_2950659
- Format
- –
- Schlagworte
- Computational modeling, Conductivity, Current sources, Dimensions, Discontinuous Galerkin frequency-domain (DGFD) method, Domain decomposition methods, Drilling, flipped total field/scattered field (TF/SF)-based solver, Galerkin method, Linear systems, logging-while-drilling (LWD), Mathematical model, nonconformal mesh, Solid modeling, Solvers, Transmission line matrix methods