Exploration Updated Date:15/04/2015

OIL’s systematic and scientific approach to exploration has been rewarded with a high success ratio of 65% of exploratory wells drilled. OIL also possesses 2D and 3D seismic data acquisition capabilities, with excellent support services ranging from satellite navigation systems to remote blasting units.

OIL owns a vast array of advanced computing systems and experienced personnel to process and interpret geo-scientific data through integrated exploration applications such as Remote Sensing, Structural and Stratigraphic Interpretation, Seismic Attribute Analysis, Source Rock Evaluation, Biostratigraphy, Petrophysics, Sequence Stratigraphy, Basin Analysis, Techno-economic Evaluation, etc.

Formation evaluation through an integrated approach of geological, geophysical, geo-chemical and reservoir engineering studies has allowed OIL to develop and exploit deep (3500-4700 m) thin sand prospects. Today, these reservoirs contribute over 50% of OIL’s production. It is envisaged that the current introduction of extensive 3D seismic will assist in reservoir management in both new as well as ageing fields, heralding a new chapter in reservoir engineering studies.

OIL has so far acquired, processed and interpreted over 70,000 line km of 2D and 5,000 sq km of 3D seismic data in a variety of terrains, including hills, deserts, rivers, marshes, etc.

Reservoir Management
OIL has pioneered the implementation of the concepts of modern reservoir management in the Indian oil industry. Numerical reservoir simulation, introduced by OIL in India for the first time in the early seventies, has remained its forte since inception. Simulation has been used as an important tool for management planning, production forecasting and decision making. Based on numerical simulation studies, gas and water injection, and water and polymer flooding projects have been successfully implemented in OIL’s fields, yielding recoveries averaging over 20% in excess of the recoverable solely by primary depletion.

OIL has also developed special expertise in reservoir management of ageing fields. Today, OIL has state-of-the-art numerical reservoir simulators with dedicated workstations and a valuable knowledge-base to handle cost-effective reservoir evaluation, development and management in all demanding environments.

An integrated database management system designed and developed in-house has been extremely efficient in processing / analysing reservoir monitoring data. Apart from routine activities for reservoir surveillance, many other operations such as transient well tests, nodal analysis, collection of crude / condensate / gas samples for PVT analysis, analysis of side-wall and conventional cores, etc. are carried out as an integral part of reservoir management.