Micro-Spherical Focused Log (MSFL™) and Microlog (ML) Tools
Direct near-wellbore Rxo measurement and qualitative permeability estimates
The Micro-Spherical Focused Log (MSFL™) tool provides a direct measurement of the resistivity in the near region of the borehole (Rxo). Working in all types of conductive mud systems, the MSFL tool string includes a caliper and a microlog (ML).
At 8 in., the high resolution of the MSFL tool can be used in the evaluation of thinly bedded sand-shale sequences. With only a 1-in. depth of investigation, the ML tool is sensitive to mudcake and offers a qualitative indication of formation permeability.
Power in combination
Run in combination with the High-Frequency Dielectric Tool (HFDT™) tool, a continuous value of the formation cementation exponent “m” may be calculated. This provides an accurate evaluation of water saturation.