New 4.75-in. Ultrasonic LWD Technology Provides High-Resolution Caliper and Imaging in Oil-Based and Water-Based Muds

摘要

Imaging technologies from azimuthal logging-while-drilling (LWD) tools provide valuable insight into borehole conditions and address multiple drilling and formation evaluation applications, such as wellbore stability assessment and fracture and bedding plane analysis. Although high-resolution images are widely available for water-based mud (WBM) applications, such as from azimuthally focused resistivity tools, their availability in oil-based mud (OBM) applications is limited.