appraisal drilling

British

noun

(in the oil industry) drilling carried out once oil or gas has been discovered in order to assess the extent of the field, the reserves, the possible rate of production, and the properties of the oil or gas

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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appraisal drilling

The oil and natural gas producer gave investors a disappointing update on appraisal drilling at an offshore well near Suriname.

From Seattle Times ● Sep. 29, 2021

Even as BP began appraisal drilling at its self-described "giant" Tiber field this August, a month later it canceled contracts to build a second platform at its Mad Dog field.

From Reuters ● Oct. 28, 2013

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023