Joe Zemanek
Mobil R & D Corporation, Dallas, TX
Bernard Strozeski
Atlas Wireline Services, Houston, TX
Zhijing Wang
Core Laboratories, Calgary, Alberta, Canada
ABSTRACT
Borehole imaging via ultrasonic pulse-echo techniques provides geophysical knowledge which reinforces other reservoir evaluation methodologies. In particular, these instruments are especially reputable in fracture and lamination characterization.
In this paper, theoretical and experimental results are provided which verify the conceptual acoustic design of the transducers employed in the Circumferential Borehole Imaging Log (CBIL). Additionally, effects of an acoustic window on the overall resolution of the imaging system are examined.
Furthermore, an analysis of the acoustic system which governs the performance of the CBIL in oil-base mud is included. Results from wells drilled with these fluids are utilized to verify the CBIL radial operational range obtained from analysis of the system.