Challenges in 3D Geocellular Modelling of Complexly Faulted - Stacked Reservoirs: Case Study from Existing and Potential Waterflood Areas in Sirikit Field, Onshore Thailand

Central Faulted Region (CFR), East Flank Region (EFR), and Greater Sirikit East (GSE) are the main production areas in the<br>PTTEP S1 Consession, part of Sirikit Field, the biggest onshore oil field in Thailand. The Lan Krabu Formation is the biggest<br>contributor for hydrocarbon production, defined as a thick fluvio-lacustrine deltaic sequence consisting of thin alternations of<br>mouthbar deposits, channels and Chum Saeng lacustrine claystone.