Interpreting Electro-facies and Fractures for an Oligocene Sandstone Reservoir Using Borehole Images Acquired in Synthetic Drilling Fluidswith Full Core Calibration: a Case Study from Songkhla Basin, Thailand

The Oligocene reservoirs in the Songkhla Basin of Thailand are predominantly fluvial-deltaic deposits. There are<br>several geological challenges describing these reservoirs. Firstly, it is som etimes difficult to determine lithology<br>from conventional open-hole logs. Seco ndly, defining facies can b e challenging due to the lack of sedim entary<br>structure information from any of the conventional open-hole logs. Thirdly, natural fractures and sub-seismic faults<br>exist in the formation which adds more complexity to the reservoirs. Geoscientists have traditionally incurred high<br>operating costs to acquire conventional cores needed to resolve these challenges.