Name any four places in India where petroleum is found.
Digboi in Assam,
Around gulf of Khambat in Gujrat
Off-shore the Arabian Sea
Bombay High in the north-west of Mumbai.
Seventeen public sector refineries are located at Guwahati, Barauni,Koyali, Haldia, Mathura, Digboi, Panipat,Chennai, Narimanam, Bongaigaon, Mumbai(HPCL), Vishakhapatnam, Mumbai (BPCL), Kochi, Numaligarh, Tatipaka (ONGC) and Bina (M.P.)