Non-living Resources of the OCS. Harald Brekke NPD
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1 Non-living Resources of the OCS Harald Brekke NPD
2 The Continental Shelf and the Area
3 Outer Continental Shelf Example
4 Norwegian Continental Shelf (NOCS) Hydrocarbon Management
5 Geographical Location Arctic Ocean Svalbard Barents Sea Jan Mayen Faroe Islands 5
6 NE Atlantic Overview 6
7 Barents Sea NOCS Structure map Norwegian Sea North Sea
8 General Stratigraphy
9 Main Prospective Level
10 The Platform Margin
11 Barents Sea NOCS Structure map Norwegian Sea North Sea
12 Barents Sea Shelf Profile
13 The Rifted, Volcanic Margin
14 Barents Sea NOCS Structure map Norwegian Sea North Sea
15 Regional Geoseismic Sections Vøring Basin
16 Vøring Basin Trødelag Platform
17 Sills and Inner Flows
18 Fracture Zone Ridge
19 Seismic Line LOS S N Vøring Spur
20 Sediment rich Abyssal Plain
21 Seismic Line LOS NW SE
22 The Microcontinent Margin
23 Jan Mayen Microcontinent but I shall contact him on Monday 23
24 Jan Mayen Microcontinent but I shall contact him on Monday 24
25 Palinspastic Crustal Transects 25 Ma Present Mjelde et al. 2008
26 Jan Mayen Tectonics Courtesy of Orkustofnun
27 Resource assessment
28 Play Model A population of discoveries and prospects that share the same critical, geological factors: Reservoir rock (age and type) Trap mechanism (tectonic, stratigraphic) Source (source rock, maturity, migration)
29 Reservoir
30 Trap
31 Source
32 Play model
33 Play model and mapped prospects
34 Statistical Play Assessment Prospect model Reservoir parameters Liquid parameters Recovery factor Prospect number distribution Area covered Prospect density Prospect size distribution Mapped prospects Minimum and maximum size estimates Risk assessment Prospect level Play model level
35 1971: Brent Oil Field Discovery FINLAND SWEDEN BRENT Balder Ekofisk Groningen Nordisk Geologisk Vintermøte Uppsala 2004
36 Brent Play Model Reservoir: Middle Jurassic sandstone Trap: Rotated fault block Source: Upper Jurassic black shales
37 Brent Play Norwegian North Sea Oil Fields Gas Fields
38 Barents Sea Extrapolation of the Brent Play on the Norwegian Sea NCS North Sea Nordisk Geologisk Vintermøte Uppsala 2004
39 Norwegian Continental Shelf (NOCS) Recoverable HC Resources
40 Undiscovered Resources
41 Confirmed and unconfirmed plays
42 Number of Plays
43 Hydrocarbon Resources Beyond 200 M
44 Limits and lines associated with NOCS
45 NOCS
46 HC Beyond 200 M
47 HC Beyond 200 M
48 Eocene Lava Play
49 Pre-Palaeocene Sandstones Play
50 Plays straddling 200 M limit line
51 Size of Plays, Norwegian Sea
52 Seabed Mineral Resources, NOCS
53 Active and Extinct Vent fields at the Arctic Mid-Ocean Ridge Hydrothermal plume Sulfide deposit Extinct field Active field Pedersen et al Courtesy of R. B. Pedersen, Univ of Bergen
54 Active fields and OCS
55 Active fields and OCS
56 The Jan Mayen Vent Field Area Courtesy of R. B. Pedersen, Univ of Bergen
57 The Troll Wall Vent Field Courtesy of R. B. Pedersen, Univ of Bergen
58 The Soria Moria Vent Field Located on a Volcanic Ridge 100m Courtesy of R. B. Pedersen, Univ of Bergen
59 Neovolcanic zone and off-axis areas 75 m grid Central Mohns Ridge 10km
60 Active fields and OCS
61 Burial of Ridge Flank and Rift Valley by The Bear Island Fan 50km Courtesy of R. B. Pedersen, Univ of Bergen
62 Location of the Loki s Castle Vent Field Courtesy of R. B. Pedersen, Univ of Bergen 7 00E 7 30E 8 00E 8 30E 9 00E Core complexes Mohn s Treasure Loki s Castle 600 m Bear Island Fan Figure 7 Sulphide layer in sediment core 10 km 3500 m
63 Loki s Castle - Relations to Volcanic & Structural Elements 3300 m Bear Island Fan Faulted Terrain Developing Core Complex? 1800 m young volcanic flows Loki s Castle Rift 2010 m Axial Volcanic Ridge N 1km Courtesy of R. B. Pedersen, Univ of Bergen
64 AUV survey 2010 N Loki s Castle Kongsberg Hugin EM m grid Courtesy of R. B. Pedersen, Univ of Bergen 1 km
65 Microbathymetry of the Loki s Castle Vent Field Hydrothermal mineral deposit High temperature vent sites 100 m Courtesy of R. B. Pedersen, Univ of Bergen
66 Chimneys & Hydrothermal Deposits 13 m Courtesy of R. B. Pedersen, Univ of Bergen
67 Loki s Castle Hydrothermal Mound Courtesy of R. B. Pedersen, Univ of Bergen
68 Comparison with the TAG Hydrothermal Mound TAG Loki s Castle Courtesy of R. B. Pedersen, Univ of Bergen TAG 100 m Loki s Castle
69 Estimated Tonnage Coverage: m 2 Max Height: m Tonnage: 1-2 Mt Courtesy of R. B. Pedersen, Univ of Bergen 100 m
70 Seafloor Massive Sulfide Deposits Norwegian Continental Shelf Sediment & basalt hosted deposits Courtesy of R. B. Pedersen, Univ of Bergen Basalt hosted Zn (Au) deposits Basalt hosted Cu-Zn deposits
71 Global Neovolcanic Zone
72 Total Amount of Cu-Zn along the Neovolcanic Zone of the Global Ridge System 1000 deposits minimum size of 100 t maximum size of 1x10 7 t Total amount of massive sulfide estimated to 6x10 8 t Median grade of 5 wt% Cu+Zn Total amount Cu+Zn estimated to be 3x10 7 t Hannington et al. 2011, Geology Courtesy of R. B. Pedersen, Univ of Bergen
73 Estimated amounts of Cu-Zn along the Neovolcanic zone of the Norwegian Ridge System The total amount Cu+Zn is estimated to be on the order of 3x10 7 t Approximately 90% of this is at slow spreading ridges The global ridge system is km long of which 55-60% is spreading at a slow rate The ridges within the Norwegian CS is around 1300 km, which represent 3% of the slow spreading ridges The amount of Cu-Zn along the neovolcanic part of the Norwegian ridges is estimated to be on the order of 1x10 6 t (No good model for development of flanking core complexes as yet) Based on Hannington et al Courtesy of R. B. Pedersen, Univ of Bergen
74 Deep Sea Geotopes, NOCS
75 Sediment fans
76 Ocean Spreading Ridges
77 Magma-influenced Continental Crust
78 Fracture Zone Ridges and Seamounts
79 Seabed Geotopes
80 Geotopes and Resource Distribution A Tentative Approach
81 Geotopes and Resource Deposits Shelf Plateaus Magmatically influenced CC Sediment fans Volcanic Arcs Spreading ridges Fracture Zones, Seamounts Magmatic Plateaus (LIPs) Abyssal Plains, Low-sed Abyssal Plains, High-sed HC HC, FMC, (SMS) HC, (SMS?) SMS SMS FMC SMS?, PMN? PMN? (HC?)
82 Geotope Features as Basis for Outer Limits Shelf Plateaus Magmatically influenced CC Sediment fans Volcanic Arcs Spreading ridges Fracture Zones, Seamounts Magmatic Plateaus (LIPs) Abyssal Plains, Low-sed Abyssal Plains, High-sed HC HC, FMC, (SMS) HC, (SMS?) SMS SMS FMC SMS?, PMN? PMN? (HC?)
83 Areas of the current submissions 83
84 Geological Features in OCS Features No of Submissions Considered by CLCS Recomm Not Recom Included in OCS so far Shelf plateaus Magmatically influenced continental crust features Sediment fans, wedges Volcanic Arcs Spreading ridges Spreading ridges, anomalous Fracture Zones, seamounts Magmatic plateaus (incl. LIPs)
85 Shelf Plateaus
86 Magmatically influenced CC features
87 Fracture Zones, Seamounts
88 Sediment Fans and Wedges
89 Volcanic Arcs
90 Spreading Ridges
91 Anomalous Spreading Ridges
92 Magmatic Plateaus
93 Seabed Jurisdiction The Area 53 % EEZ 39 % OCS submissions 7 % OCS in PIDs 1 %
94 Summary Most frequent features submitted for Shelf plateau areas Magmatically influenced continental crust features Fracture zones and seamounts Sediment fans and wedges Low expectations for HC resources in OCS, except on some large continental plateaus Geotopes included in submissions are probably mostly in favour of FMC, less of SMS, and least of PMN Acreage under current submissions for OCS amounts to 7-8 % of total seabed
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