Baghjan structure was identified in 1991 based on limited seismic data and later re-defined based on additional 2D seismic of 1999-2000.The presence of commercial hydrocarbon in the area was first established in the first well (Baghjan-1) drilled in 2003 by 3-D seismic survey.
Many tea gardens (TG) are surrounding the project site and clustered at the eastern portion of the area. The names of the important tea gardens in the area are Baghjan, Dighaltarang, Diamuli and Longswai etc.
The land-use and land-cover of Baghjan and nearby DSNP area have been interpreted from the satellite data (LANDSAT Imagery), top sheet of the area and subsequently by ground trudging during reconnaissance surveys. The land use pattern of Baghjan area shows that majority of the land (60%) is used for agriculture purpose with paddy and tea garden. The settlements cover about 20% of the total area. The roads including part of NH 37 within the Block covers 2% of the total area. Open mixed jungle and open scrub cover an area of 2% and 3% of the total area. The Dibru river is the main water channel flowing southwest towards Tinsukia. Maguribeel, a major wetland of Tinsukia District lies south of the project site.