Abstract

In the quest for tapping more unexplored zones for Hydrocarbons with declining resources, deeper explorations of Basal Clastics and Basements have become major thrust area for exploration in Mumbai Offshore. The recent exploratory success in wells BHE5, BH-E6 has put up early monetization of Basal Clastics/Basements as major thrust for incremental production. On the contrary, the log features of Basal clastics and Basements display wide range of heterogeneity with sedimentation and tectonic origins, mainly manifest by bedding, inter-bedding, fractures and are complex in nature. Globally, such complex reservoirs (basement and Low permeability basal sandstones) are increasingly becoming targets for petroleum exploration and development because they contain vast resources which were stranded before the advent of modern well logging/ completion technologies. Often this formations (Basement/Basal Clastics) are difficult to delineate with basic conventional techniques/logs, here we try to delineate producible zones by applying Hilbert Huang Transform to Conventional Logs and corroborate them with Production Log data. Hilbert Spectral Analysis (HSA) applied on log data of formations BCL/Basement for wells BH-P, BH-S is found to be an excellent method to find producible zone and also the results go hand in hand with the production log data.