--> Abstract: Paleocene-Eocene Play - Future Exploration Focus for Deeper Prospects in North Assam Shelf, Assam & Assam Arakan Basin, India, by H. J. Singh, R. K. Singh, S. K. Roy Moulik, Md. S. Akhtar, and Anupma Baveja; #90078 (2008)

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Paleocene-Eocene Play - Future Exploration Focus for Deeper Prospects in North Assam Shelf, Assam & Assam Arakan Basin, India

H. J. Singh, R. K. Singh, S. K. Roy Moulik, Md. S. Akhtar, and Anupma Baveja
ONGC, Dehradun, India

This study presents an exploration focus in North Assam shelf, Assam & Assam Arakan Basin for probing the underexplored reservoirs of deeper Paleocene-Eocene play and a paradigm shift from lithostartigraphic to chronostratigraphic approach. The application of high resolution sequence stratigraphy has helped in evolving depositional models of Paleocene-Eocene (Tura-Sylhet-Kopili formation) play in the entire North Assam shelf and their vast impact on hydrocarbon exploration. It brings out a prospectivity perception of this under explored deeper play within Tura, Sylhet & Kopili reservoirs in the identified parasequences/system tracts.

Six parasequences have been identified within Tura and Sylhet Formation whereas three higher order sequences have been brought out within Kopili Formation. Mapping of each parasequences within Tura & Sylhet formation and system tract analysis within within Kopili formation brought out maximal sand distribution trends.

Environment of deposition of Tura Formation is mainly active fluvial channel system from continental to inner shelf environment whereas Sylhet Formation has been primarily deposited in shallow marine environment. Kopili Formation on the other hand is mainly ‘barrier bars-tidal inlet-tidal bar-tidal flat-lagoonal- bayhead delta’ depositional system.

This study leads towards future prospectivity perception, based on identification of areas having good reservoirs (sand maximas) superposed on paleostructures which were available at the time of migration.

Based on the above analysis, prospective areas of significant aerial extent with substantial reserve accretion potential have been identified. Such studies can also give a fillip for re- exploration of deeper prospects in fields where only shallow prospects have been probed so far.

 

AAPG Search and Discovery Article #90078©2008 AAPG Annual Convention, San Antonio, Texas