Deciphering Carbonate Complexity Through 3D Reservoir Modelling For Effective Well Placement In Drilling Operation: Case Study From F Field In Central Luconia Province, Sarawak

Carbonate fields are well known for their complex heterogeneity. The F carbonate field is no exception. F field which is located in Central Luconia, offshore Sarawak, is a platform carbonate with areal extension of 9km X 5km. The maximum hydrocarbon column is around 120m. In total, there are five (5) wells available in the field, which include one exploration well, F-1 which was drilled in 1969, an appraisal well, F-2 which was drilled in 2009, and three development wells which had been drilled recently to provide 250 MMscf/d of gas to the nearest facility, named as F-A1, F-A2 and F-A3. During the development wells drilling campaign, the team was disappointed when the first well drilled, F-A3 penetrated the poor quality reservoir. This has negatively impacted the production capacity of the well. Therefore, the team has made some initiatives by updating the property model of the two (2) remaining wells, based on the results obtained from the first well, to improve the static model and to propose new trajectories to ensure the reservoir properties could be improved tremendously. As a result, the team has successfully drilled into a terrific reservoir quality area in the two (2) remaining wells with flying colours, and the targeted production rate has been successfully achieved.