Cairn bets on shale, sees 10% drop in India’s oil imports at peak output

Shale is a type of natural gas trapped in fine-grained sedimentary rocks called shales. Cairn’s onshore Rajasthan oilfields – Mangala, Bhagyam and Aishwariya (MBA) – are its flagship and most prolific assets. They jointly produce up to 20% of India’s entire crude output.