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O
Oxygenated Gasoline
Overriding Royalty Interest (Contract): A royalty interest that may be
retained by a third party as payment or investment. This interest normally
bears no part of the drilling and completion expenses of the well.
Overshot: A shing tool designed to slip over the sh and grasp the outside.
Overthrust: An area of earth shift common to mountainous regions in which
strata are shoved upward creating highly titled reservoirs.
OWC: See Oil/water contact.
OWR: Oil/water ratio.
Oxbow Lake: A crescent-shaped body of generally isolated water, cut off
from a meandering stream as the stream changed its course.
Oxidation: Oxidation