Uptime factor

A well can be temporarily shut-in due to environmental (or other) reasons. For example, an offshore oil well might be shut-in for a week due to an impeding tropical storm, or an onshore gas well might be shut-in for a workover. The length of time that the well is shut-in is often referred to as downtime, and it follows that uptime is a measure of how long the well is producing. If you were to monitor that well (or a group of wells) over time, you might find that you can predict the average downtime for that well, and then you can use that in your production forecasting. Consequently, the uptime factor is a prediction of expected producing time for a well.

For example, if a well is shut-in for one month every year, then the uptime factor calculation would be

Uptime factor is related to Flow rate calculations