The oil field located in Maharashtra is Mumbai High (also called Bombay High), situated off the coast in the Arabian Sea.
Mumbai High (Bombay High) is the most important offshore oil field in India and the answer expected for Maharashtra on the map. It is located in the Arabian Sea, off the Mumbai coast. In map-skill questions, write the exact name clearly — examiners look for the correct location name. This is from the Minerals and Energy Resources chapter (Class 10 Geography).