Abstract

Geleki field hosts multiple established hydrocarbon pools in Tipam sands of Lower to Middle Miocene age, Rudrasagar and Demulgaon formations of Oligocene age and Kopili sands of Eocene ages. Present study was carried out using more than 300 well log data by well correlation technique in dip and strike directions. Henceforth, generated structure maps and characterised various structural elements of Geleki field formed as a result of Miocene to recent tectono sedimentary evolution viz. Geleki Main fault , Anticline of East block, Structural high of West block, Naga thrust in South-West and South of the field and Monoclinal structure of Girujan clay surface. Structure plays a very important role in the entrapment of hydrocarbons in Geleki field of North Assam Shelf.