From October 2003 until March 2007 a large integrated study was performed in the Study Centre of Petroleum Development Oman (PDO) to develop (waterflood) field development plans for a cluster of 23 fields. The study effort was conducted by a large multi disciplinary study team and several man-years of the total study effort were spent in petrophysics. In this paper we will present an overview of the learnings of the petrophysical study in this multi-disciplinary context. The key learnings are the following:
Ensure that petrophysical uncertainties are understood in the context of other subsurface uncertainties.
Ensure that the regional petrophysical picture is understood to position every part of the study effort within this regional picture.
Coring, core analysis and the embedding of core data can be sped up significantly through careful co-operation with all stakeholders.
Ensure that rigorous uncertainty estimates are provided for those petrophysical parameters that impact the development decisions.