CoreandServices.book - Ocean - Schlumberger

Units
Base Measurement
A base measurement is the fundamental measurement for a type of data. Base
measurements represent the most generic categories of measurements. You can see
examples of base measurements in Fig. 4-5 on page 4-197.
“extent of space between points”
“degree of hotness or coldness”
“space occupied by an object”
“volume moving over a period of time”
“force exerted over a surface divided by area”
Length
Temperature
Volume
Flowrate
Pressure
Fig. 4-5 Base Measurements
Measurement
A measurement is a dimension, quantity, or capacity. It contains a semantic notion that
helps clarify its meaning. The notion is often taken from the application domain. For
example, diameter and thickness are both length measurements, but they apply to
different types of data (Fig. 4-6 on page 4-197). Measurements provide meaning to most
data, but some data, such as a phone number, does not have a measurement and thus is
dimensionless.
“length across a circle or pipe”
“length through a rock layer”
Diameter
Thickness
“temperature at which a substance boils”
“temperature at the bottom of a borehole”
Fig. 4-6 Measurement Hierarchy
Schlumberger Private
Boiling Point
Bottomhole
Temperature
Ocean Services 4-197