Jasmine Field, Gulf of Thailand: How a 7 MMbbl Oil Field Produced 50 MMbbls and is Still Producing

Abstract

Abstract The Jasmine Field began production in 2005 with initial estimated recoverable reserves of 7 MMbbls. Appraisal continued after the initial "A" platform commenced operation resulting in significant reserve growth that allowed for the installation of four additional production platforms (B, B1, C and D) and one remote platform, Ban Yen "A", which began production in 2008. The Jasmine (and Ban Yen) Field was developed via deviated wellbores from the various platforms and was considered fully developed by late 2009. Oil production declined rapidly, accompanied by rapidly increasing water cut; leading to the perception of a short economic field life (in 2009 the end of field life was expected during 2012). Since 2009, Mubadala Petroleum has been engaged in an active infill campaign, drilling 44 infill wells and 3 delineation wells. Delivery of this successful infill programme resulted from: Integrated study of two volumetrically significant reservoirs; the 680 and 50-sands (key targets for infill programme);Active reservoir management, increased data acquisition and reservoir surveillance activities;Utilisation of horizontal wells (usually geo-steered) to improve recovery (20 wells since 2009);Expansion of the facilities to accommodate additional well slots and water handling;Recent use of isolatable multi-zone completions to mitigate water coning/cusping. The success of this endeavor is such that a 50 MMbbls production milestone was passed in November 2013 and end of field life continues to increase through the use of improved engineering, science and technology.