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.

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