دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: igneous or metamorphic rock, which seldom contains petroleum. Ordinarily, it lies below sedimentary rock. When it is encountered in drilling, the well is usually abandoned.

unproductive rocks, usually igneous or metamorphic, at the bottom of a sedimentary rock sequence.

v: to drill a hole until basement rock is encountered, usually in a wildcat well. If no hydrocarbon-bearing fonnations are found above the basement, the well is assumed to be dry. The term comes from the fact that basement rock is sometimes granite.

n: a method of exploration drilling in which drills to the basement when drills the wildcat well