Reservoir characterization and hydrocarbon potentiality of Simian field, offshore Nile Delta, Egypt.

Abstract

The main objective of this study is De-risking hydrocarbon exploration and development by characterization of the Pliocene gas sandstone reservoir using different formation evaluation approaches showing the impact of different petrophysical analysis workflows on reserve estimation as a routine petrophysical evaluation can’t be used for evaluating such shaly sand reservoirs, and that allow better understanding of facies and fluids distribution along the field. Simian Field is a Pliocene dry gas field located in the eastern part of the West Delta Deep Marine (WDDM) concession, offshore NileDelta, Egypt, approximately 120 km North-East of Alexandria, Egypt, in water depths ranging between 500 and 1500m. Simian Field covers an area of about 200 km2, comprises of a complex submarine channel system consisting of varying reservoir quality sands with dirty sand and shale in background. Thin beds could be expected in the form of sheet sands and splays. composed of 3 regions Main Channel (divided into North and South) , Central Channel and NW Sheet Main Channel complexes, estimated to hold > 80% of the field GIIP, have been the focus of development to date, while the NW Sheet and Central Channel, estimated to hold ca. 10% and 4% respectively cumulative gas production as of YE 2010 of about 1.3TCF. There are 9 wells in Simian Field 6 development wells and 3 exploratory wells .The Simian reservoir is a heterogeneous succession of sandstones and mudstones organised into a broad upward-fining succession. High-quality, blocky sands occur at the base, while the upper part of the section is characterised by apparently isolated sand bodies encased in thin-bedded sands and mudstones .The research methodology is carried out through four main steps :