RLL meaning in oil and gas

Resistivity Lateralog

Generally designates an older generation technology for measuring formation properties by inducing an electrical current (via a small central electrode) into the formations adjacent to the tool and then measuring the resistance change as the current returns to a upper and lower remote current return electrodes; any basic Wireline Logging reference will provide more detailed information (see Luthi, S.M.; Geological Well Logs; Springer Verlag Pubs.; ISBN 3-540-67840-9 Edn. 2001)<p> Definition derived from Bigelow, E.L.; Introduction to Wireline Log Analysis; Western Atlas Pubs Doc. Nr. AT94-146 Rev.o6/95 5M WC; Houston, June 1995