totally three refineries
last one is in Tarapur,Maharastra
11 working
Four oil refineries of India -1) Digboi, 2) Nunmati, 3) Barauni,4) Mathura. Four petroleum producing states of India- 1)Assam, 2) West Bengal, 3) Kerala and 4) Gujrat
mathura
Digboi Digboi
Reliance india limited , jamnagar (gujrat) refinary
Bpcl (bharat patolium ) , hpcl , ongc ,gail , kochi refineries , mangalore refinieries
kochi- mangalore-mumbai -koyali
Mathura Hyderabad Mumbai delhi
Koyali is found on Gujarat in India. It houses oil refineries that caters to oil supplies on India and it's nearby countries.
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Nigeria have 3 refineries and they are located at kaduna,warri and porthacourt
kochi-mangalore-mumbai-koyali