METHOD FOR IDENTIFYING COMPLEX LITHOLOGIES IN A SUBSURFACE FORMATION

摘要

A subsurface formation surrounding a borehole is logged by recording an induced polarization log, recording a nuclear log of delayed gamma rays from the activation of aluminum and recording a nuclear log of inelastic scattering gamma rays from the activation of iron in the formation. The induced polarization log and the nuclear logs are then combined to identify the composition of the lithology of the formation.