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Petrotech 2010 New Delhi
Comparative Assessment of Deepwater Plays off India, Southeast Asia and Northwest Australia
Flood basalt provinces such as the Deccan Traps:
Major episodes of rapid crustal growth through regional dykes
The >1 km thick exposed section at Mahabaleshwar
Top BasaltTop BasaltTertiary BasinTertiary Basin
Cretaceous BasinCretaceous Basin
Sub-Basalt ChallengesSub-Basalt Challenges
(Kerala-Konkan Basin, Western Offshore India)(Kerala-Konkan Basin, Western Offshore India)
Sub-Basalt Petroleum Systems’ Uncovering STRATIGRAPHYUpper Cretaceous Post-Rift Reservoirs Lower Cretaceous Syn-Rift Lacustrine environment Source rock potential – Coals/Shales Jurassic Break-up Unconformity STRUCTUREStructural Mapping of Key Seismic HorizonsIsochrons and Isopachs – Basin Reconstruction
PROSPECT EVALUATION – PETROLEUM SYSTEMThermal Regimes - Probability of Reservoir, Seal, Source Rock, Migration, Timing of Migration/Entrapment Accumulation Size, Risk Assessment, Economics
Plays Offshore Sunda ArchipelagoWestern Sunda:
Offshore Sumatra
Natuna/South China Sea Sea
Phillipines – Palawan Basin & Sulu Seas
Offshore Kalimantan/Sulawesi
Offshore North Madura/North Bali
Eastern Sunda:
Timor Sea & Arafura Sea
Northwest Australia
South Irian Jaya
Success Case Histories
• Structures North Sumatra/Andaman Sea
• Onshore Central Sumatra
• Offshore East Java
• Offshore North Bali
Similar Success Case in the Archipelago Back-Arc Arun Gas Field
• Arun Gas Field - North Sumatra, is a pinnacle reef feature originally with 10TCF of gas reserves, now under depletion, has been a major LNG export for more than four decades, main reservoir is an early Miocene rimmed platform carbonate.
Slide 22
Deepwater Eastern Archipelago
• East Archipelago Deepwater Exploration
• Timor Sea
• Arafura Sea
• Northwest Australia Offshore Exploration Deepwater
• Offshore South Irian Jaya
Summary - Outlook
Deepwater Plays Offshore India – Sub-Basalt ImagingPre-Tertiary Basins Development
Deepwater Plays Southeast Asia – Complex Imaging Pre-Tertiary Basins Development