Encyclopedia of Petroleum Geoscience

Living Edition
| Editors: Rasoul Sorkhabi

Petroleum Field Appraisal

  • J. G. Gluyas
Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-02330-4_22-1


Oil and gas field appraisal is undertaken to determine the size and characteristics of a petroleum discovery. Those characteristics include the quantity of oil and/or gas present, the location of fluid contacts, the presence and distribution of baffles and barriers to fluid flow, and the quality of the reservoir. Data gathered during appraisal will be used to determine whether the field development is commercially viable, and if viable how the field should be developed.


Field appraisal links the discovery of petroleum in the exploration phase with the decision as to develop the discovery or not. Appraisal typically involves drilling more wells, each of which has a comprehensive data acquisition program. Appraisal may well involve acquisition of new seismic data. The aim of the process is to determine how much oil (standard barrels of oil initially in place, STOIIP) or gas is initially in place (gas initially in place, GIIP) for the discovery and determine how...

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© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Earth SciencesDurham UniversityDurhamUK