July 1, 2012. The Panna-Mukta-Tapti fields in the western offshore that accounts for approximately 6.5% of India's domestic oil and gas production has reached the production milestone of 500 million barrels of oil equivalent (mmboe) cumulative oil and gas production, said the consortium operating the fields. The consortium comprises of Oil and Natural Gas Corporation (ONGC) which holds a 40 per cent stake and Reliance Industries (RIL) and BG Exploration and Production India (BGEIPL), which each hold a 30 per cent stake in the fields.