دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an unconformity in which formations above and below are not parallel. See unconformity.

An unconformity in which the beds below the unconformity dip at different angles than the beds above it.

adj: layered in parallel and unbroken rows of rock, indicating that no disturbance occurred during deposition of the rock. Compare unconformity.

an approximate level of rock strength where sufficient cementation is present to allow the rock to remain intact during drilling and production. Often the unconfined compressive strength is greater than 1000 to 1500 psi.

n: 1. In geology, any sharp or welldefined boundary between two different bodies of rock. 2. A bedding plane or unconformity that separtaes formations.

the depth of the interface between the oil and water, oil and gas, or water and gas.

n: an interruption in sedimentation caused by erosion;the strata above and below the disconformity are parallel. See unconformity. Compare nonconformity.

a change in the formation that may have been caused by ancient erosional forces. Accounts for variances in formation tops in near-by offset wells in a formation with no pay inclination.

a sand with an unconfined compressive strength of 300 to 1000 psi. Crushable with forceps.

usually a crystalline unconformity on which a non-magnetic sedimentary rock sequence has been deposited.

formation with an unconfined compressive strength of less than 300 psi. Can be crush with fingers.

n: a buried landscape in which sediments were deposited on an eroded surface of igneous or metamorphic rock. Compare unconformity.

an unconformity that separates profoundly different rock types, such as sedimentary rocks from metamorphic.

n: 1. a surface representing the hydrodynamic pressure gradient of groundwater flowing through an aquifer. 2. the level to which unconfined flowing water would rise.