Abstract

Vasai East field, which is the area of study of this work, is located in Mumbai Offshore. The development of the field was undertaken about two years back. The development plan envisaged all horizontal wells in Bassein Limestone reservoir. This reservoir is primarily a depleted thin-oil reservoir with a free gas-cap and a thick aquifer. Further, occurrences of severe to very severe mud loss during appraisal drilling indicate presence of vugs, channels and karsts which may provide good to very good horizontal and vertical permeability. This will in turn provide path to gas and water channeling during the production phase of the reservoir. A good completion planning is, therefore, imperative to control water cut and gas channeling for optimizing the oil production.