دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: any numerical or geometrical quantity or quantities that serve as a reference or base for other quantities.

a relative comparison point, such as the Kelly bushing, sea level or mud line.

n: a reference elevation, or height, used in mapping, usually sea level.

n: a height. or elevation, usually sea level, from which altitudes are measured in surveys.

n: a level metal plate attached to the tank shell or bottom and located directly under the gauging reference point to provide a fixed contact surface from which liquid depth measurement can be made.

n: the point to which all measurements for the calibration of a tank are related.

the zero depth datum for well logging.

n: a European term for the point on the bottom of a container that the dip weight touches during gauging and from which the measurement of the oil and water depths are taken. The dip point usually corresponds with the datum point, but any difference in levels must be designated in the calibration table.