Which oil-rich basin in Riau, Sumatra, historically operated by Caltex and now Pertamina, hosts the supergiant Minas and Duri oil fields, utilizing steam injection technology?
Answer and explanation
Correct answer: D. Rokan Block (Central Sumatra Basin)
- Step 1: The Rokan Block in Riau contains the Minas field (Sumatran Light Crude) and Duri field. Step 2. Duri is home to one of the world's largest steam flood enhanced oil recovery (EOR) projects, injecting high-pressure steam into heavy oil reservoirs. Answer: Rokan Block (Central Sumatra Basin). Why not the others: Minas and Duri are not located in South Sumatra.
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