Upstream activities cover exploration and production of oil, gas, and geothermal. The aim of exploration activities is to discover new oil and gas reserves as a replacement of hydrocarbon that has been produced. This effort is intended to maintain the production continuity. The exploration and production activities are performed through its own operation and joint operation arrangements. The business partnership forms are JOB-EOR (Joint Operating Body for Enhance Oil Recovery), JOB-PSC (Joint O...

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