1. n. [Formation Evaluation]

The position on a logging tool that best represents the center of the vertical response of the measurement. For a simple single transmitter-single receiver measurement, the measure point is half-way between the transmitter and receiver.

See: first reading,  reference point

2. n. [Formation Evaluation]

The point on a logging tool at which it is considered the logging measurement is made. It is the center of the vertical response, or in some cases an alternative, more suitable point. For measurements that must be recorded over a significant time period, there is a difference between the static and dynamic measure point, known as the lag.

See: vertical resolution