M-09 DOWNHOLE ORBITAL VIBRATOR SOURCE AND SINGLE WELL IMAGING Summary 1 GANG YU 1 LARRY A. WALTER 1 BILL CHMELA 2 LEIF JAHREN 2 JOHN O’BRIEN 3 AND JUSTIN C. LIME 3 The downhole orbital vibrator source originally developed by Conoco Inc. operates as a free-hanging device in the fluid column on a standard 7-conductor wireline. An internal spinning eccentric mass produces a rotating force vector from the tool to the formation. This new downhole seismic source generates a 50 to 400 Hz bandwidth energy sweep which is energized from a surface controller with programmable sweep length and start/stop times.