دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

abbr: black;used in drilling reports. black granite n: see diorite.

balance line.

n: intrusive. or platonic. generally coarse-grained igneous rock composed largely of plagioclase feldspar with smaller amounts of dark-colored minerals. Also known as black granite. Compare andesite.

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

n: an igneous rock composed primarily of feldspar, quartz. and mica. It is the most common intrusive rock - that is, it originally solidified below the surface of the earth. Its rock crystals are easily seen by the eye.

common igneous rock. No effective permeability.

a sandstone with a large percent of weathered granite grains.

abbr: igneous;used in drilling reports. igneous rock n: a rock mass formed by the solidification of magma within the earths crust or on its surface. It is classified by chemical composition and grain size. Granite is an igneous rock.

solidified molten rock. Specifically granites, etc.

n: a light-coloured feldspar mineral (KA1Si3O8),common in granite.