Abstract

This paper evaluates the possibility of application of data, knowledge and skills developed in the course of hydrocarbon exploration to the new area of exploration for unconventional deeper ground water aquifers. Feasibility of evaluating ground water occurrences in a small block in Western Rajasthan based on information from seismic data and drilled wells of ONGC is examined. The targets are deeper ground water aquifers, generally not explored by ground water organizations. Drilled well data available in Jaisalmer basin of Rajasthan comprising 24 well completion reports, 7 Formation Evaluation Reports and wire line logs from 13 wells were studied to identify water bearing horizons and their nature. The study identified low salinity zones in Kharatar, Ghotaru, Bankia, Manhera Tibba and further east. Regional disposition of these water-bearing horizons was attempted on few seismic lines shot in the area by ONGC. Intensive studies through geophysical surveys, drilling and testing of wells are recommended for eventual exploitation of deeper aquifers (below 200m) in view of acute water shortage faced in these areas. The study is considered important in view of the impending menace of water shortage and the urgent necessity of pooling available resources towards its mitigation. This approach was based on successful efforts in tapping unconventional (deep) ground water resources elsewhere in the world, particularly the Great Man-made River (GMR) Project of Libya.