Driller's Log

Definition - What does Driller's Log mean?

A Driller’s Log is a special document that contains all the changes that occur within the depth of an oil well and the rock formation. Apart from these, the changes are also sampled after every 5 feet of the formation change and the data collected is recorded on a timely basis. The driller maintains this Log for every drilling action that covers up the general information such as date, well number, location, country, state, drilled by, hole size, bit size and depth, etc. This Log is very useful in understanding the health of a wellbore. It is also known as a well log.

Petropedia explains Driller's Log

In the petroleum industry, a Driller’s Log is an important document that is used to keep a timely record of the various activities that are carried out on an oil well. This document logs in the different measurements, physical aspects, analysis results, flow rate, drilling tools used and any other important data.

Also referred to as a well log, this database helps the drilling superintendent or drilling supervisors to:

  • Monitor the activities that have been performed on a well bore.
  • Search for old activities that were carried out.
  • Document the current status of the well construction.

A Driller’s Log is an essential and legal document that needs to be prepared by a license holder driller or an organization. This legal document details the important information regarding a borehole such as its location, owner information, borehole data, purpose of drilling and so on.

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