png onshore basins - multiclient interpretation

PNG Multi Client Study

A regional gravity and magnetic interpretation project

over the West Papua New Guinea petroleum basins


The Project

North New Guinea Basin (Block 2)

Papuan Basin (Block 1)

This contemporary project aims to model and map the crustal and basinal architecture of the Western Papua New Guinea basins. The

primary scope of the project will be to outline the nature and structural controls of the petroleum basins to produce a robust and consistent

regional tectonic framework.


Plate Tectonic Setting

From Hill and Hall (2003)

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Tectonic Domains

From Williamson and Hancock (2005)

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StratigraphyG

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from Hill and Hall (2003)


Present SettingG

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Modified from Hill and Hall (2003)


Tectonic DevelopmentG

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Triassic – Jurassic

From Borel and Stampfli (2002)

Cartoon diagram from Hill and Hall (2003)


Passive margin development

Important basement architecture structures established



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Cretaceous – Paleogene

Obduction along the leading edge of the Australian margin

Convergence and Accretion


From Hill and Hall (2003) From Williamson and Hancock (2005)



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Neogene

Platform sediment deposition and south

verging fold and thrust belt development

Transpressional Shortening


Project FocusG

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From Williamson and Hancock (2005)


Datasets• Datasets to be used in the project include:– Ground gravity.– Satellite gravity (1 to 2 minute:- spherical

harmonic degree is 2160 for an approximate resolution of 9km).

– Airborne magnetic (datasets range from the 60s through to the 2000s).

– Available well and seismic data.

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Datasets: Ground GravityA

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Datasets: Satellite GravityA

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Datasets: Airborne MagneticA

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Datasets: Seismic and Wells• Open file Data– Available open file well and seismic data will be

used to provide constraints for the modelling.• Proprietry Data– Any proprietary data made available by sponsors

will only be used to constrain the modelling and will not be detailed or included within the deliverables

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Datasets: Open file wellsA

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Regional Basement Structure

• Regional Structural Mapping and Basin Architecture Maps – This will be based on the integrated analysis of the gravity

magnetic and spectral data sets to interpret the basin-forming and deforming structures and structural geometries which are fundamental to the regional basin architecture for the North New Guinea and Papuan basins.

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Basement Geometry• Modelling of Basement geometry and Sediment

Distribution – 2D gravity and magnetic modelling utilising available

onshore gravity station data Satellite gravity and airborne magnetic data. Available well and seismic lines will be used to help constrain depth to basement and basin structure.

– Focus on the morphology of Cretaceous and Tertiary basins, basement highs and basement composition.

– Correlate and modify where nessessary existing regional stratigraphy with basin geometry to provide a context for understanding the distribution and deformation of source and reservoir units and potential trap domains.

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Moho surface• Inversion of satellite gravity data to produce a

regional Moho grid. – The aim for modelling the Moho surface will be to examine

the link between the lower crust, Moho geometry, and surface deformation.

– The architecture of the Moho and lower crust will provide important insight to the Mesozoic rift geometry and further means for understanding the evolution and subsequent inversion of Papuan Basin.

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Deliverable Products• The results of this work will be presented as grids

and located geotiffs with vector data presented in GIS formats and DXF files. These will be supplied as GIS projects and as a Kingdom project. An accompanying report will provide detailed discussion of the results and the implications for basin development and hydrocarbon prospectivity.

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Project Structure

• Block 1 (Papuan Basin) interpretation, modelling and reporting will be completed first followed by Block 2 (North New Guinea Basin).

• The regional Moho Surface modelling will encompass both the Blocks and be done in conjunction with the initial Block 1 work program.

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Project Benefits

• How will the client benefit– enabled exploration companies to understand and

properly evaluate the potential of the basin. – Access to high quality data for a fraction of the cost of

exclusive proprietary ownership– Allows company to prospect on trend or regional basis– Ability to “ramp up” knowledge base very quickly using

available “off the shelf” data– Facilitates higher exploration and development success

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Participation• Benefits for sponsorship ofthe West Papua New

Guinea petroleum basins project include: – an exclusivity period with the data. The duration of

this exclusivity period will be negotiated with sponsors to make sure their requirements with the data are met.

– Sponsors of the project will be provided with ongoing, regular updates, presentations and preliminary products throughout the progression of the work program. A final presentation of the results and discussion will be presented to the sponsors.Ho

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png onshore basins - multiclient interpretation

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