(i) About 63 per cent of India’s petroleum production is from Mumbai High.

(ii) 18 per cent from Gujarat and 16 per cent from Assam.

(iii) There are three major off shore fields of western India, where oil is produced.

(iv) Ankleshwar is the most important field of Gujarat.

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(v) Assam is the oldest oil producing state of India. Digboi, Naharkatiya and Moran- Hugrijan are the important oil fields in the state.