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A Brief Description of

Tangguh Giant Gas Fields,

Bintuni Basin, Papua – Indonesia

BP Indonesia

Meizarwin

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Outline

• Regional Geology

• Exploration History

• Play and Petroleum System

• Reservoir Description

• Future Exploration Potential

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bpBird Head Regional Geology

Syafron et al, 2008

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EXPLORATION PHASE 1

Tertiary Reef Objective Phase

EXPLORATION PHASE 2

Pre-Tertiary Objective Phase

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KASIM

SELE

TERTIARY REEF OBJECTIVE PHASE

1935 – NNGPM (Shell) start exploration

1936 – first discovery (60 mmbo)

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1939-1942 drilled 25 wells Two discoveries Produced 1951-1961, 7 mmbo, 43API

1977-1986 Total & Conoco drilled 28 wells One discovery in 1981, 3 mmbo Wiriagar

1973 – Trend discovered Kasim field >350 mmbo

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SOUTHERN BIRD’S HEAD

PRE-TERTIARY

GAS DISCOVERIES-1

1971 (Phillips) TBE-1X & 1981 Kalitami Good Jurassic reservoir, wet

1987 (Total) Sebyar-1 : Jurassic reservoir absent First gas shows in Paleocene, K, Permian

1981-1992 10 wells drilled in Bintuni Bay 3 discoveries by Oxy : Roabiba, Ofaweri, Wos

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SOUTHERN BIRD’S HEAD

PRE-TERTIARY

GAS DISCOVERIES-2

1998 D&M certified 14.4 TCFG

1994/5 East Onin-1

1994 Wiriagar Deep-1 discovery Jurassic and Paleocene reservoir

1995 Farm in to Berau Takeover operatorship Drill WD-2 appraisal

1996/7 Vorwata & Ubadari discoveries

1996 BG discovered Mogoi Deep –1

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A B

Vorwata Field

A Giant Middle Jurassic Play

Berau Sekak Ridge Bintuni A B

50 km

(31 miles)

Vorwata

Wiriagar

- S E K A K R I D G E -

A B

Type of basin: Complex structural evolution.

Jurassic extension and erosion/truncation during

peripheral bulge at the rift shoulder.

Hydrocarbon habitat: Coupled petroleum system

between reservoir and source rock.

Type of data: 2D seismic data only by 1990’s,

Roabiba Field four-way-closure first pre-Tertiary

discovery in Indonesia.

Basis for discovery: Vorwata structure drilled in a

high (V1) expecting an analogue to Roabiba Field

…. But found a complex structural-stratigraphic

trap.

bpBerau-Bintuni Bay Area

Petroleum System Summary

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Vorwata Conceptual Geologic N-S Cross Section

Schematic Geology Cross-Section

bpOverlay of Vorwata Closure on Top of

Bandung Map

Lembang

Bandung

Jatinangor

Cimahi

Padalarang

Baleendah

Soreang

bpVorwata Field

Middle Jurassic NW – SE Well Correlation

0

500 ft

Log Type

Modified after Marcou et al, 2004

bpWiriagar Deep Field

Paleocene NW – SE Well Correlation

0

500 ft

Modified after Marcou et al, 2004

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bpTangguh Reservoir

• Jurassic Marginal Marine Depositional System within an

overall transgressive sequence

Middle Jurassic “Roabiba” Sand

Good porosity and permeability

One Pressure Compartment Per Structure

• Paleocene Submarine Fan Complex

Southward prograding turbidite deposition

Good porosity

Permeability highly variable

Jurassic

0.001

0.01

0.1

1

10

100

1000

10000

0 5 10 15 20 25

0.001

0.01

0.1

1

10

100

1000

10000

0 5 10 15 20 25

Paleocene

Core Porosity & Permeability

Marcou et al, 2004

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SOUTHERN BIRD’S HEAD

POST TANGGUH PRE-TERTIARY

GAS DISCOVERY

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Asap Discovery

(2010)

Post Tangguh Gas Discovery

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18

… What next?

Waterbottom Map

Abadi

Tangguh

NWS

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19

Mesozoic and Paleozoic wells distribution

Modified after Wilson and Moss, 1999

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Summary (1)

• Pre 1990 :

• No Pre-Tertiary Discoveries

• 13 wells penetrated Pre-Tertiary

• Today :

• Tangguh is Indonesia’s Major Gas Discoveries

• First Gas June 2009

• More than 1 TCF gas have been produced

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Summary (2)

• Post Tangguh Discoveries

• Abadi and Asap gas discoveries

• Few additional Pre-Tertiary penetrations in

Southern Bird’s Head are unsuccessful

• Future :

• The Papua area is still relatively under explore

• Potential exploration opportunity in deep water

• Stratigraphic play is part of potential high risk

high reward play

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TERIMA KASIH