Petrotech 2010 New Delhi

Comparative Assessment of Deepwater Plays off India, Southeast Asia and Northwest Australia

Present Morphology Fabric Offshore

India, Southeast Asia, & Northwest Australia

Deepwater Plays Offshore India

India’s West Coast

India’s East Coast

Andaman Sea India

Sub-Basalt Plays Deepwater Plays

India’s West Coast

Plate Tectonics

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

Gravity Map Trends

West Indies

& Maldives

Madagascar and the Reunion

Hot-Spot, on two sides of ocean ridge

triple-junction

WesternGeco’s Over-Under 2D Regional (2006)

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)

Migrated CMP - Velocity Analysis

Sub-Basalt PrimaryGetting stronger with offset

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

OU-214 Top Basalt and Sub-Basalt

Andaman Sea

The link of India and Southeast Asia

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

Morphology off India, Southeast Asia, & Northwest Australia

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

Inverted Structures North Bali

Major Provider of Domestic Gas in Indonesia

Slide 23

Stratigraphy West Natuna

Seismic Expression - Anambas Graben

Makassar Strait TQ3D

Makassar StraitFold-Belt Deepwater

Makassar Strait Deepwater Folds

Tectonics Philippines

Palawan 3D - West Linapacan

Instantaneous Phase Atribute

Gas-Water Contact

Palawan Basin - Malampaya Field

Deepwater Eastern Archipelago

• East Archipelago Deepwater Exploration

• Timor Sea

• Arafura Sea

• Northwest Australia Offshore Exploration Deepwater

• Offshore South Irian Jaya

NEPS Lines Timor Sea + Arafura Sea

Sabo Prospect – Timor Sea

Sabo Block - Timor Sea

Sabo Prospect Reconstruction

Leti and Masela Blocks

Leti Prospects Deepwater

Leti Block - Arafura Sea

Top Paleozoic Masela

Arafura Sea

Masela Structure - Strike

Irian Jaya Basins

Stratigraphy Salawati and Bintuni Basins

Irian Jaya Survey Deepwater

Miocene Basin and Misool High: Cretaceous over Pliocene

Kais Carbonate Play

Ultradeep-water : Jurassic Fault Bend Fold Play

Bintuni Bay - Jurassic Play (Wiriagar Gas Field)

Irian Jaya Survey Deepwater Foldbelt

Summary - Outlook

Deepwater Plays Offshore India – Sub-Basalt ImagingPre-Tertiary Basins Development

Deepwater Plays Southeast Asia – Complex Imaging Pre-Tertiary Basins Development

Sub-Salt Could be SweetR.Fainstein, 2002 Petroleum Economist

Deepwater Reservoirs Producing Profile