Full text loading...
-
Triaxial Induction Tools Responses in Layered Arbitrarily Anisotropic Medium
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 82nd EAGE Annual Conference & Exhibition, Oct 2021, Volume 2021, p.1 - 5
Abstract
Summary
Due to different sedimentary environments, the realistic formation shows different electrical anisotropic characterizations. In general, only electrical anisotropy in layered unrotated media is considered, which is not always available in the practical application. With the widespread availability of multi-component induction logging technology, it is willing to solve more complicated electrical anisotropy problems. Therefore, it is important to introduce a universal algorithm applicable for arbitrary electrical anisotropic media. A fast forward algorithm, based on dyadic Green’s function, is proposed to compute the triaxial induction responses under arbitrary anisotropic media. Anisotropic dip and azimuth are introduced to further characterize the complicated electrical anisotropy. Numerical simulations proved the robustness of the algorithm, and illustrated the responses under different electrical anisotropic situations. It can be concluded that anisotropic dip and azimuth could impose great influences on the triaxial induction logging responses. Some important phenomena can be observed, for example, there exist critical borehole dip and critical anisotropic dip in the rotated uniaxial and biaxial media, and the crosscouping magnetic components, Hxy (Hyx) and Hyz (Hzy), are closely related to the anisotropic azimuth. The proposed algorithm could well make up the deficiency of traditional method and reduce the uncertainties of resistivity interpretation.
© EAGE Publications BV