Abstract

The tectonic setting, geological history and proven discoveries of hydrocarbons in area adjoining to Mizoram prompted ONGC to restart its Exploration activities in Mizoram. Logistically the area is extremely difficult which is hilly with thick forest and rapid drastic elevation changes and geologically very complex due to faulting, folding & thrusting of beds. Logistically difficult area had always been the challenges for seismic crews to acquire the data. Problems are further complicated if the sub-surface geology is highly complex. To carry out seismic survey in Mizoram was a big challenge due to above mentioned difficulties. In this paper the methodologies/ strategies adopted by a Seismic crew of ONGC, Jorhat to acquire seismic data, overcoming tough logistic conditions and geological complexities are explained. The paper also explains the initiation taken in QHSE and Public relations aspects. As a synergistic approach the seismic crew coordinated other three surveys viz. Geological, Geochemical and Gravity-Magnetic survey to improve the level of confidence for delineating the subsurface geological features. The crew had clearly made a break through in acquiring good quality data that too also without any accident in this most difficult terrain and maintained excellent relations with local public