Hindustan Oil Exploration Company Limited is an India-based oil and gas company. The Company is engaged in the exploration, development and production of crude oil and natural gas in India, both onshore and offshore. Its asset portfolio consists of approximately 10 oil and gas blocks of discovered resources and one exploratory block. The Company's operations include Dirok, Kharsang, Umatara, Greater Dirok, B-80, PY-1, Asjol, North Balol, and Palej. Kharsang Oil field, situated in Arunachal Pradesh, produces sweet crude from multiple shallow Reservoir intervals of the Upper Girujan Formation. Umatara is located at an approximate distance of 55 Km south-west of Duliajan, in the district of Dibrugarh and consists of Umatara field and South Rajgarh field. It operates three marginal fields in the Cambay Basin: Asjol, North Balol, and CB-ON-7 (Palej). Its subsidiaries include Hindage Oilfield Services Limited and Geopetrol International Inc., among others.