Publications

L Field is a brownfield located in the South Sumatra Basin with numerous producing wells. Adjacent to this field, there is a large carbonate reservoir with a significant recovery factor. Carbonate is found in L Field but it was deposited in distal environment with different characters. In attempt to prolong the life of L Field, its carbonate reservoir is evaluated. An integration between geology, petrophysics, reservoir and production engineering works has been done to get comprehensive results. The evaluation was put into 2 categories, qualitative and quantitative methods. The qualitative method is done by geologist whom deals with well-by-well review, reservoir correlations, depositional environment interpretation according to regional context, and qualitative candidates scoring. The quantitative method is divided into petrophysical and production data analyses as well as well integrity. The final screening candidates are the result of both methods. Based on the core description from adjacent field, carbonate in L Field has 2 different zones, zone A and B. From the qualitative perception only, zone A can be categorized as non-reservoir, due to high gamma-ray reading. However, the solubility test confirms that the zone has high calcareous content. After final scoring, L-14 well has the highest score for zone A and L-15 for zone B. This Poster highlighted the importance of a cohesive approach among multi-disciplines works which can successfully identify missed pay potential to proving up reserves. As a result, a significant amount of volumetric has been calculated for carbonate in L Field. Due to the good solubility result of the formation with HCl, matrix acidizing stimulation is also prepared. To prove-up reserves in L Field initially, it is recommended to open zone A of L-14 and zone B of L-15. The workover will continue with the remaining wells which have lower scores contingent on both wells' results