An Integrated Gravity And Magnetic Interpretation Of The Porcupine Basin, Offshore Ireland
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List of Contents


AN INTEGRATED GRAVITY AND MAGNETIC INTERPRETATION OF THE PORCUPINE BASIN, OFFSHORE IRELAND

Contents

EXECUTIVE SUMMARY

GENERAL INTRODUCTION
2.1 Introduction
2.2 Scope of Report
2.3 Database
2.3.1 Potential Field Data
2.3.2 Seismic Data
2.3.3 Geology
2.4 Exploration History

REGIONAL STRUCTURAL FRAMEWORK
3.1 Introduction
3.2 Plate Tectonic Setting
3.3 Structural Framework
3.4 Structural Evolution

STRATIGRAPHIC FRAMEWORK
4.1 Introduction
4.2 Basement
4.3 Devonian - Early Permian Intra-cratonic Sag Phase
4.4 Permian - Early Jurassic. Early Rift Phase
4.5 Mid - Late Jurassic. Main Rifting Phase
4.6 Cretaceous - Recent. Main Sag Phase

GRAVITY AND MAGNETIC PROCESSING
5.1 Introduction
5.2 Gravity Data
5.3 Magnetic Data
5.4 Transform Processing
5.4.1 Reduction to Pole
5.4.2 Regional-Residual Separation
5.4.3 Second Vertical Derivative
5.5 Display

GRAVITY AND MAGNETIC INTERPRETATION
6.1 Map Interpretation
6.1.1 Slyne Trough
6.1.2 North Porcupine Basin
6.1.3 North Porcupine Basin
6.1.4 Porcupine Seabight Basin
6.1.5 Porcupine Ridge
6.1.6 Irish Platform
6.1.7 Globan Spur
6.2 Depth Estimates from Magnetic Data
6.3 Profile Modelling
6.3.1 Profile Modelling Methodology
6.3.2 The Gravity and Magnetic Models
6.4 Structural Synthesis

PETROLEUM GEOLOGY
7.1 Introduction
7.2 Reservoir and Seals
7.2.1 Basement
7.2.2 Devonian - Lower Carboniferous
7.2.3 Upper Carboniferous (Namurian - Stephanian)
7.2.4 Permian
7.2.5 Triassic
7.2.6 Lower Jurassic
7.2.7 Middle Jurassic
7.2.8 Upper Jurassic
7.2.9 Lower Cretaceous
7.2.10 Upper Cretaceous and Danian
7.2.11 Upper Palaeocene and Eocene
7.3 Source Rocks
7.3.1 Hydrocarbon Occurrences
7.3.2 Source Rock Potential
7.3.3 Maturation and Migration
7.4 Play Concepts and Exploration Fairways
7.4.1 Normal Fault Blocks/Buried Highs
7.4.2 Thrusted Fault Blocks
7.4.3 Triassic Salt Traps
7.4.4 Upper Jurassic Sand Fans and Pinch Outs
7.4.5 Lower Cretaceous Sand Fans and Pinch Outs
7.4.6 Upper Cretaceous Mounds
7.4.7 Eocene Sand Fans and Pinch Outs

ACKNOWLEDGEMENTS

REFERENCES AND BIBLIOGRAPHY

MATURITY MODELLING IN THE PORCUPINE BASIN

AN INTEGRATED GRAVITY AND MAGNETIC INTERPRETATION OF THE PORCUPINE BASIN, OFFSHORE IRELAND

LIST OF FIGURES

1 Location Map
2 Bathymetry
3 Sedimentary Basins West of Britain and Ireland
4 Mesozoic Rift Systems of N.E. America and Western Europe
5 Plate Tectonic Evolution of Porcupine Basin Area
6 Structural Framework (Top Jurassic Level)
7 Bouguer Gravity
8 Residual Bouguer Gravity
9 Second Vertical Derivative, Bouguer Gravity
10 Magnetic Anomaly
11 Magnetic Anomaly Reduced-to-Pole (R-T-P)
12 Second Vertical Derivative, Magnetic Anomaly R-T-P
13 Pre-rift Reconstruction Based on Magnetic Anomaly R-T-P
14 Magnetic Model - Profile 3 (Seismic Line Wire 2)
15 Gravity Model - Profile 3 (Seismic Line Wire 2)
16 Magnetic Model - Profile 6 (Seismic Line Wire MS-81-25)
17 Gravity Model - Profile 6 (Seismic Line Wire MS-81-25)
18 Magnetic Model - Profile 1A (Seismic Line Wire BP Tie - 4)
19 Gravity Model - Profile 1A (Seismic Line Wire BP Tie - 4)
20 Summary of Gravity and Magnetic Interpretation
21 Structural Domains Map
22 Stratigraphic Column
23 Triassic Palaeogeography
24 Middle Jurassic Palaeogeography
25 Upper Jurassic Palaeogeography
26 Lower Cretaceous Palaeogeography
27 Apto-Albian Palaeogeography
28 Eocene Palaeogeography
29 Burial History - Wells 26/8-4 and 35/8-2
30 Burial History - Wells 35/19-1 and 43/13-1
31 Oil and Gas Kitchens Areas
32 Structural Styles

AN INTEGRATED GRAVITY AND MAGNETIC INTERPRETATION OF THE PORCUPINE BASIN, OFFSHORE IRELAND

LIST OF ENCLOSURES
Scale 1:500,000

1 Bathymetry
2 Geoseismic Montage - Sheet 1 (Scale 1:100,000)
3 Geoseismic Montage - Sheet 1 (Scale 1:100,000)
4 Stratigraphic Framework
5 Well Correlation
6 Bouguer Anomaly
7 Residual Bouguer Anomaly
8 Second Vertical Derivative, Bouguer Gravity
9 Magnetic Anomaly
10 Magnetic Anomaly Reduced-to-Pole (R-T-P)
11 Second Vertical Derivative, Magnetic Anomaly R-T-P
12 Petroleum Geology and Play Fairway Summary Map