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- Title
Finite element simulations of logging-while-drilling and extra-deep azimuthal resistivity measurements using non-fitting grids.
- Authors
Chaumont-Frelet, T.; Pardo, D.; Rodríguez-Rozas, Á.
- Abstract
We propose a discretization technique using non-fitting grids to simulate magnetic field-based resistivity logging measurements. Non-fitting grids are convenient because they are simpler to generate and handle than fitting grids when the geometry is complex. On the other side, fitting grids have been historically preferred because they offer additional accuracy for a fixed problem size in the general case. In this work, we analyse the use of non-fitting grids to simulate the response of logging instruments that are based on magnetic field resistivity measurements using 2.5D Maxwell’s equations. We provide various examples demonstrating that, for these applications, if the finite element matrix coefficients are properly integrated, the accuracy loss due to the use of non-fitting grids is negligible compared to the case where fitting grids are employed.
- Subjects
BOREHOLE logging; FINITE element method; MAXWELL equations; DISCRETIZATION methods; MAGNETIC fields
- Publication
Computational Geosciences, 2018, Vol 22, Issue 5, p1161
- ISSN
1420-0597
- Publication type
Article
- DOI
10.1007/s10596-018-9744-6