SUBSURFACE FORMATION ANISOTROPY DETERMINATION WITH TILTED ORTRANSVERSE MAGNETIC DIPOLE ANTENNAS

摘要

Transverse or tilted magnetic dipole antenna systems are used for electromagnetic logging measurements to determine the anisotropic resistivity of subsurface formations. Combined measurements between transverse or tilted antennas, as well as axial antenna s, are used to compensate for receiver antenna mismatch in the system. Some embodiments use model-based parametric inversion to estimate the anisotropic resistivity in the presence of invasion and shoulder- bed effects.