GETECH

Project Rationale and Objectives

The study builds on GETECH's experience in maximising the results of gravity and magnetic data interpretation to underpin a re-evaluation of the continental-scale plate tectonic history and structural development of the Circum-Arctic region. This forms the basis for mapping five critical palaeogeographic and palaeolandscape timeslice reconstructions. Aided by an analysis of the modern day drainage, the study reviews the landscape evolution and likely effects on sediment dispersal. It also contains a review of the geochemical literature, new 1D and 2D geochemical modelling, a synthesis of the stratigraphic framework and palaeoclimatology and palaeoceanography. All these will have been used to generate new insights into the petroleum systems of the South Atlantic margins.

The foundations of the study will be interpretations of gravity and magnetic data:

• ArcGP gravity dataset
• GETECH's unique ‘Ultimate’ satellite gravity data.
• The Geological Survey of Canada’s NAMAG and Arctic Compilation magnetic datasets.
• Russian 1:2.5 million scale magnetic contour maps.

Some critical issues addressed will include:

• How do the differing tectonic models for the Arctic influence petroleum systems?
• Did the Arctic Ocean behave like a large lake during the Cretaceous and Tertiary, and if so what affect does this have on source facies development?
• How do changes in the hinterland evolution of the large Siberian drainage systems affect source and reservoir facies on the Arctic margin, especially the development of deltaic systems?

Sponsors of the Circum-Arctic Study who also licence GETECH's Russian Arctic Continental Shelf Aeromagnetic Data will be entitled to an upgrade to our Circum-Arctic Study that will incorporate this new dataset with the findings of the original study. This will include a depth-to-basement assessment, structural interpretation. This study will only be available to purchasers of both products and will be free of charge.

Deliverables

The studies are delivered as:

• Multivolume A3 reports with accompanying A0 enclosures (hardcopy and pdf)
• GIS projects (ArcGIS 9x)

Reports

Executive Summary and Introduction

Geophysics Interpretation

• Images of the gravity and magnetic data to illustrate key features
• Eight regional 2D modelled gravity profiles across the principal basins
• Depth-to-basement map from public domain information and other datasets

Tectonic and Structural Framework

• Structural interpretation of the gravity and magnetic data
• Re-evaluation and testing of published structures

Plate Modelling

• Plate tectonic modelling and review of the history of the Arctic Ocean

Stratigraphic Framework

Petroleum Geochemistry

• Source rock characterisation and evaluation
• Burial history modelling
• Correlation of available source rock and oil data

Palaeoclimatology and Palaeoceanography

Drainage and Landscape Analysis

Palaeogeography and Palaeolandscape

• Six palaeogeographic reconstructions (maps of rotated data locating palaeoenvironments, tectonophysiographic terrains and lithologies)
• Palaeoelevation interpretation and derived palaeo-digital elevation models
• Palaeodrainage reconstruction (including drainage basin geometry and evolution through time)

Petroleum Systems Identification and Evaluation

Key Exploration Issues

• Predicted risk and uncertainty maps

Conclusion, References and Appendices

Ten A0 Enclosures

 

GIS Project

A series of .mxds illustrating:

Potential Field Data

• Gravity and magnetic data and derivatives

Structural Framework

• Structures and tectonic boundaries

Palaeogeographies

A series of maps: Palaeoenvironments and tectonophysiographic terranes Palaeotopography PalaeoDEM (digital elevation model) Palaeodrainage

For each of six timeslices: Late Glacial Maximum (LGM) Ypresian Turonian/Cenomanian Neocomian/Aptian Kimmeridgian Carnian/Norian

Modern Day Drainage

• Landscape analysis grids and shape files

These non-exclusive studies are licensed to companies under GETECH's standard Licensing Agreement