This reference is for an abstract only. A full paper was not submitted for this conference.
Following an extensive full field review two years ago, this paper outlines the results of the first phase of the redevelopment plan for the Bokor field, offshore Malaysia.
The field has been in production since 1982 and is characteristed by a very thick vertical interval of stacked sands - some 150 reservoirs over 6000ft. Development has been hindered by the lack of structural imaging due to shallow gas - this is compensated within the main area by a large number of wells, however as the field matures and other opportunities are sought, an accurate structural image is once again a major issue.
In addition to the structural uncertainty, the high number of relatively thin sands, together with the low API (20–24) and strong water drive over much of the interval make it a challenge to maintain sufficient control over sweep to achieve a high recovery factor. These challenges and uncertainties are detailed in the paper, together with the mitigation plan adopted during the FDP study phase.
The first phase of the re-development has seen the drilling of 3 new wells which take the field to platform space, load and handling limit, together with the reprocessing of the original 3D seismic data as well as various other initiatives all aimed at both increasing production today and gathering data to reduce uncertainty for the future.
This paper looks at the results of the infill campaign and compares it to the model predicted, both in terms of geology and well performance, and discusses the differences from the predictions and lessons learnt. Whilst the seismic image over much of the main field area remains poor, the reprocessing, together with the results from a walk away VSP acquired on one of the in fillwells, has shed important light on various facets of the structural interpretation and these are discussed at length, together with recommendations for future acquisition to minimise the impact of the shallow gas that sits over the field.
Finally, in conclusion, the paper looks at the future, major redevelopment phases and how this new data has shaped the decisions the team faces.