FDP-Revisions: Keeping Your FDP's Green in a Fit-For-Purpose Manner

Abstract

Petroleum Development Oman (PDO) is operating many technically complex and mature onshore oil fields in the Sultanate of Oman. Recently PDO has established a ring-fenced Study Centre to carry out Integrated Field Studies to maintain up-to-date Field Development Plans (FDP's). Generation of a robust updated FDP typically takes up to 18 months, and takes into account full subsurface uncertainty and development options analysis in order to arrive at the optimum development. When executing these FDPs, new subsurface data comes in, which often generates new insights in the field that need to be incorporated. This does not require always a full new FDP-study, but a focused revision of the existing FDP. A so-called 'Hit-Squad' team was established to deliver these quick & fit-forpurpose FDP-revisions.In this paper, a case study is presented related to a mature clastic oil field in the Sultanate of Oman. The latest FDP, generated in 2004, proposed a peripheral waterflood, however, the expected pressure support was not observed in the crestal part of the field. This created an exposure in terms of expected oil recovery and jeopardised the remainder of the FDP-implementation. This paper describes how the 'Hit Squad' attacked the problem and delivered a fit-for-purpose FDP-revision to bring the remainder of the development back on track.