Step 1: Understanding the question.
The question asks for the location of the Naharkatiya mineral oil field, one of India’s important oil-producing regions.
Step 2: Explanation.
The Naharkatiya oil field is located in the Dibrugarh district of Assam. It is one of the oldest oil fields in India and a major center for crude oil extraction in the northeastern region. The field is operated by Oil India Limited (OIL).
Step 3: Conclusion.
Hence, the Naharkatiya mineral oil field is located in Assam.