Hey as per my idea Head office of Hindustan Petroleum is in Mumbai and here I am giving you its details

About Hindustan Petroleum
Hindustan Petroleum Corporation Limited is an Indian state-owned oil and natural gas company with its headquarters at Mumbai, Maharashtra and with Navratna status.

Board of directors

Mr. M.K.Surana: Chairman and Managing Director

Mr. P K Joshi: Director- Human Resources

Mr. B. K Namdeo: Director – Refineries

Mr. Y K Gawali: Director – Marketing

Mr. Ramaswamy: Director –Finance

Ms.Urvashi Sadhwani – Director

Mr. Sandeep Poundrik: Director

Shri.Ram Niwas Jain

Refineries
Mumbai Refinery - 6.5 Million Metric Tonnes (MMT) Capacity
Visakhapatnam Refinery - 8.3 MMT at Visakhapatnam
Mangalore Refinery Pvt. Ltd. - 9.69 MMT at Mangalore, Karnataka(HPCL has 16.65% Stake).
Guru Gobind Singh Refinery - 9 MMT at Bathinda, Punjab (HPCL & Mittal Energy each have 49% stake).
Barmer Refinery -9 MMT Capacity. It is a Joint Venture with Rajasthan Government.

Address
Hindustan Petroleum Corporation Limited.
Petroleum House,
17, Jamshedji Tata Road,
Mumbai 400020.
Maharastra, India.