Workshop 22
The Geology of the North Sea in a Single Day Sunday, June 7th |
Convenors
- Henk Kombrink (North Sea Core)
Description
The geological history of the North Sea is an incredibly rich journey through a range of climates and depositional environments. From Devonian continental deposits to Eocene deep-water turbidites, thanks to its near-continuous history of subsidence, the North Sea is not only one of the world’s classic petroleum provinces, it is also a unique archive that allows us to reconstruct the history of the area as it shifted from south of the equator to its northern position at the present day.
Because the reservoirs that were deposited in deserts and deep seas have been targeted by numerous exploration, appraisal and development wells, from which a huge amount of cores were cut, we have the material that allows us to unravel the depositional history of the North Sea in unprecedented details. That is what this workshop will be about.
Starting in Devonian times, we will spend the full day making our way from intra-montane basins and eroded basement blocks, via a catastrophic flooding in Permian times, to unconsolidated Forties sands that may seem to have found that final destination yesterday. Every core tells its story, and supported by short presentations and a series of tailored diagrams, the North Sea will come to life during this day of geological time-travelling.
Sub-Topics that will be covered in the workshop:
Sedimentology, Stratigraphy, Paleogeography, Basin Analysis, Petroleum Geology
Participant Profile
Anyone who wishes to increase their understanding of how the North Sea evolved over geological time, or see a very diverse range of depositional environments captured in core from a single basin.
Workshop Programme
| Time | Activity |
|---|---|
| 09:00 | Welcome |
| 09:15 | How coring works |
| 09:30 | Introduction to North Sea Core and what the day will bring |
| 09:45 | How the North Sea was discovered |
| 10:00 | Taking a look at the first core ever cut in the UK North Sea – 38/29-1 |
| Start of our geological walk through the North Sea | |
| 10:15 | Basement and Devonian – the start of widespread deposition following the Caledonian Orogeny |
| 10:25 | Taking a look at basement and Devonian cores from the Inner Moray Firth and the Buchan field |
| 10:40 | The Carboniferous of the North Sea – The story of two contrasting depositional environments |
| 10:50 | Taking a look at Carboniferous cores from the Central and Southern North Sea |
| 11:00 | Break |
| 11:15 | The Permian of the North Sea – Deserts and shallow seas |
| 11:25 | Taking a look at Rotliegend and Zechstein cores – Various eolian deposits, followed by a variety of carbonates and evaporites |
| 11:50 | The Triassic of the North Sea – Dryland fluvial deposition across vast areas |
| 12:00 | Taking a look at Triassic cores from the Northern, Central and Southern North Sea – inspecting how facies belts were grossly equal during the Early Triassic |
| 12:15 | The Middle Jurassic of the North Sea – Uplift and deltaic progradation |
| 12:25 | Taking a look at Middle Jurassic cores of the Brent Group, the Beatrice field and the Rattray volcanics in the Central North Sea |
| 12:45 | Lunch break |
| 13:30 | The Upper Jurassic of the North Sea – Extension and deep basins |
| 13:40 | Taking a look at Upper Jurassic cores – the Kimmeridge Clay source rocks, shallow and deep marine sands |
| 14:00 | The Cretaceous of the North Sea – More than just fines and post-rift subsidence |
| 14:10 | Taking a look at Cretaceous cores – Turbidites of the Kopervik trend and Chalk of Late Cretaceous age |
| 14:25 | The Cenozoic of the North Sea – The start of a massive sediment dump |
| 14:45 | Break |
| Special topics | |
| 15:00 | Volcanics – Looking at the northernmost UK well drilled on the Erlend Volcano |
| 15:10 | The Durward and Dauntless field – developing a marginal discovery |
| 15:25 | Unconformities – The Base Permian and Base Cretaceous unconformities in core |
| 16:00 | The Zechstein flooding in core – the most dramatic geological event in the North Sea |
| 16:15 | Coring accidents – the Upper Jurassic of well 15/21b-50 |
| 16:30 | Closure and group discussion |
| 17:00 | End of the day |