Papua New Guinea Country Report: Onshore basins with shale resources

potential.

Gyeongji, Busan – SOUTH KOREA June 8-12 2015

Gregory Balavue Acting Assistant Director, Petroleum Exploration and PNG National Coordinator -

Shale Resources Department of Petroleum and Energy

PAPUA NEW GUINEA

CONTENT

• INTRODUCTION • PNG BASINS • WAY FORWARD • CHALLENGES • PNG WORKING TEAM • SUMMARY

INTRODUCTION

• Basin 1: Papuan Fold Belt, • 1.1: Foreland Basin sub basin • 1.2: Eastern Papuan sub basin • 1.3: Torres sub basin

• Basin 2: North New Guinea Basin, • 2.1: Sepik Sub-basin, • 2.2: Ramu Sub-basin, • 2.3: Aitape sub-basin

• Basin 3 : Cape Vogel Basin

• Basin 4 : Bougainville & New Ireland Basin 80% offshore

PAPUAN BASIN Name of Basin: Papuan Fold Belt Geographic Location (roughly) Central part of mainland Papua New Guinea Exploration or Production Basin Fully explored currently, and producing oil and gas Do you have regional and local cross sections showing source formations

Yes

Do you have Stratigraphic column showing geologic age, source rocks and other data

Yes

Well log data for wells including shale interval. Digital LAS or printed

Yes, can be provided, stored in archives!

Do you have subsurface depth maps? (digital or printed)

Yes, can be located in PNG Petroleum archives

Name of the major reservoir formation of the basin

Toro sandstone (primary), Iagifu as secondary target.

Name of the major source Formations Koi-Iange, Barikewa, Imburu source rocks. Depositional environment of the source formation (Marine or Non-marine)

Marine

Thickness of the source formation (roughly)

800m – <3000m

TOC of the Source Formation 0.5 – 1.5 wt % Mineral composition of the Source Formation

TBC

Maturity (or Ro) 1 - 3.5%

Chronostratigraphy

Papuan Basin General Geol. Cross-section

North New Guinea Basin

North New Guinea Basin Name of Basin: North New Guinea Basin……sub-Basins: Sepik, Aitape and Ramu

Geographic Location (roughly) Northwest PNG Exploration or Production Basin Exploration, 10 permits Do you have regional and local cross sections showing source formations

Generalized

Do you have Stratigraphic column showing geologic age, source rocks and other data

Yes, as shown below for the three sub basins.

Well log data for wells including shale interval. Digital LAS or printed

7 wells drilled, 8th is currently being drilled. Printed data available

Do you have subsurface depth maps? (digital or printed)

Yes, printed.

Name of the major reservoir formation of the basin

Miocene Carbonate reefs, Pliocene turbidites, Early Pliocene shallow marine sandstones

Name of the major source Formations No definite oil source identified in sections analysed – maturity measured as vitrinite reflectivity (Ro) and spore colour index (SCI) Carbonaceous horizons in Wewak Beds – gas prone

Depositional environment of the source formation (Marine or Non-marine)

Marine

Thickness of the source formation (roughly) < 500m, basement proximal

TOC of the Source Formation Potential Source Kitchen Aitape Basin – Aitape Trough Sepik Basin - Yawa Trough Ramu Basin southeast of Tsumba-1

Mineral composition of Source Formation TBC

Maturity (or Ro) TBC

North New Guinea Basin Chronostratigraphy

Geological Summary:

• Fore-arc basin with clastic shelf sands and Tertiary reefs. Potential Petroleum systems

include: • • Reservoir: • Miocene reefs (analogous to Salawati “Birds Neck” Irian Jaya) • Plio-Pleistocence clastics (120m net quartzose sand penetrated in Tsumba-1) • Late to Early Cretaceous turbidites • • Source rock: • Tertiary shales/carbonates/coal • • Seal: • Plio-Pleistocene mudstone and shales • • Traps: • Thrusted anticlines, carbonate reef build ups, stratigraphic traps •

Cape Vogel Basin

Cape Vogel Basin

Geographic Location (roughly) South east of PNG Exploration or Production Basin Exploration only at this stage Do you have regional and local cross sections showing source formations

Yes, results of some exploration activities so far are available

Do you have Stratigraphic column showing geologic age, source rocks and other data

Figure 6: Chronostratigraphy of Basin

Well log data for wells including shale interval. Digital LAS or printed

5 wells drilled (shallow), some had oil and gas shows.

Do you have subsurface depth maps? (digital or printed)

Yes, printed.

Name of the major reservoir formation of the basin

Rubia sandstones penetrated has porosities of 22-31%, Carbonate are potential reservoirs

Name of the major source Formations Gas seeps in area, unpenerated pre-Woruka interval, geochem data indicate lean and gas prone source.

Depositional environment of the source formation (Marine or Non-marine)

Marine

Thickness of the source formation (roughly) 500m or less due to basement proximal TOC of the Source Formation TBC Mineral composition of the Source Formation

Tbc

Maturity (or Ro) Tbc, well sample not collected for analysis.

Cape Vogel Stratigraphy

New Ireland and Bougainville Basins

Bougainville & New Ireland Basin

Geographic Location (roughly) Eastern PNG

Exploration or Production Basin Exploration on-going, 12 permits.

Do you have regional and local cross sections showing source formations

Yes, generalized shown below (figure 7).

Do you have Stratigraphic column showing geologic age, source rocks and other data

Yes, from earlier exploration.

Well log data for wells including shale interval. Digital LAS or printed

Yes, but very old, new drilling should confirm

Do you have subsurface depth maps? (digital or printed)

Yes, very old.

Name of the major reservoir formation of the basin

Mainly reefal – Lelet Limestone

Name of the major source Formations Unpenerated formations of basin, source and maturation potential

Depositional environment of the source formation (Marine or Non-marine)

marine

Thickness of the source formation (roughly) <1000m

TOC of the Source Formation TBC

Mineral composition of the Source Formation TBC

Maturity (or Ro) TBC

Bougainville and New Ireland Basin Chronostratigraphy

Way forward and Challenges

Training in assessment methodology

Mapping process, experience

No Government policy, vital appln/software

Local Working Group (LWG)

• National Coordinator, MSc-GeoSci Exploration, AUST.

• Mr William Keket, MSc-Geophy– AUST • Ms Boio Arua, MSc – Geol. AUST. • Ms Larissa Solomon, MSc-Geol. UK • Ms Joy Mataenge, Ms Doreen Kava, Ms

Lynette Noipo, Mr George Imanaui, Mr Pilu Kouvali – all BSc holders (PNG).

SUMMARY

YOUR ATTENTION IS MUCH APPRECIATED

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