Borgohain, 59, prior to his new assignment, had served as executive director (production) on his lateral transfer to the field headquarters Duliajan in January, this year.
He will take charge of the new role from tomorrow, OIL said in a press release.
He had earlier served as Head-Geoscience in the Rajasthan Project, where he was subsequently promoted as General Manager (Geoscience) and then as Executive Director (Rajasthan Project).
Borgohain had joined Oil India as a Geologist in October 1981 after working as Junior Geologist in the Geological Survey of India for more than a year.