Cairn India is looking for technical partners to help develop tight oil and gas resources on its prolific Rajasthan onshore block and expects to issue a formal tender for turnkey bids by the end of next month for an initial phase thought to be valued at more than $1.5 billion.

Cairn executives met services companies, drilling contractors and engineering outfits in Houston last week to hear pitches on how best to tap a resource base of some 5 billion barrels of oil equivalent across the 5100-square-kilometre block, known as RJ-ON-90/1.