Study details a glance
Biostratigraphy
Review
109
Wells
Tertiary
Mesozoic
Paleozoic
Key points
- Technically consistent, regionally correlatable Ichron Sequences assigned from first returns to TD in every well
- 58 wells newly added to the NSD, providing additional offset control points to condition update of the existing 51 well NVG and Horda Platform area database
- 2024 Version newly includes J-Sequence picks (as per Partington et al., 1993, updated to Copestake and Partington, 2023), plus illustration of deviations relative to NPD Factpages formation assignments
A 109-well update to PetroStrat’s correlative biostratigraphic framework across Norway and the UK, focused on the North Viking Graben & Horda Platform area of the northern Norwegian North Sea (Quads 30 to 33). This database is representative of the majority of fields and discoveries, including Brage, Frigg, Hild, Odin, Oseberg and Troll Fields areas, with the interval studied including the Tertiary to Triassic hydrocarbon bearing units of the Tertiary (Frigg and Ty) and Jurassic-Triassic, (Sognefjord, Fensfjord, Krossfjord, Ness, Etive, Oseberg, Cook and Statfjord formations). These 109 wells were prioritised for inclusion, to capture the deepest wells penetrating the oldest stratigraphic units to provide a technically consistent and correlatable framework and reference across the area through time. This latest extension includes 58 wells that are new to our database, plus a re-review of 51 existing database wells. This is our first release of the Norwegian Stratigraphic Database (NSD), to include the revised, integrated PetroStrat zonation scheme.
The new 58-well extension includes the recent Brent discovery wells of 30/2-5 S and 31/1-2 S and Sognefjord discovery well 31/2-22 S, and intends to provide an updated, technically consistent, and correlatable framework to support nearfield exploration & carbon capture projects. The 58 new wells were prioritised for inclusion following a thorough screening and ranking of >250 wells based on review of released legacy biostratigraphic datasets from DISKOS. Key criteria used to short-list these wells included;
- Location in less mature licensing areas, and the flanks of major fields/structures
- Dovetailing with our existing NVG & Horda Platform database (51 wells)
- Penetration to basement
- Data highlighting Tertiary prospectivity
- Wells to help constrain distribution of productive Draupne & intra-Heather sands
Biostratigraphically defined Ichron-sequences are assigned throughout the wellbore following rereview by staff micropalaeontologists, palynologists & nannopalaeontologists of released technical reports, charts & .dex files. All 109 wells in this updated 2024 version now include J-Sequence picks (where Jurassic sections are present in a wellbore) as per Partington et al., 1993, updated to Copestake and Partington 2023, and Ichron Sequence picks. All J-Sequence pick interpretations are attributed with confidence indicators.
Integration of the 58 new wells offers additional, biostratigraphically-constrained control points to help provide an enhanced stratigraphic framework for the modelling of the main phases of sand deposition, throughout the entire 109-well database through revision of the original North Viking Graben and Horda Platform database. Companies with licenses to the original database can upgrade their licenses to a 2024 version for a nominal additional fee.
Deliverables
- Digital export of Ichron stratigraphic sequences, J-Sequences and lithostratigraphic boundaries (Excel format, suitable for import to seismic & reservoir modelling software)
- Stratigraphic framework and zonation scheme
- Summary charts for 109 wells including age, local lithostratigraphic formation name, sample data points & biostratigraphic marker events, against wireline/MWD logs
- Correlation panels highlighting regional thickness trends, stratigraphic breaks & hiatal surfaces within the context of the regional structural elements
- IC format database
- Includes new Deviations column, highlighting differences in interpreted depths of formation/member by PetroStrat, relative to that published on NPD Factpages
Well List
51 Existing Wells
| 29/3-1 | 31/2-5 | 30/6-3 |
| 30/9-15 | 30/12-1 | 31/5-6 |
| 29/6-1 | 31/2-8 | 30/6-5 |
| 30/9-16 | 30/2-3 | 31/6-1 |
| 29/9-1 | 31/3-2 | 30/6-7 |
| 30/9-2 | 30/3-2R | 31/6-2 |
| 30/10-2 | 31/3-3 | 30/7-7 |
| 31/1-1 | 30/3-9 | 31/6-3 |
| 30/10-5 | 31/4-11 | 30/8-1S |
| 31/2-1 | 30/4-1 | 31/6-6 |
| 30/10-6 | 31/4-3 | 30/8-2 |
| 31/2-15 | 30/4-2 | 31/6-8 |
| 30/11-4 | 31/4-4 | 30/8-4S |
| 31/2-19S | 30/5-1 | 32/2-1 |
| 30/11-6S | 31/4-6 | 30/9-10 |
| 31/2-3 | 30/6-11 | 32/4-1 |
| 30/11-7 | 31/5-2 | 30/9-12 |
58 New Wells
| 30/2-2 | 30/6-19 | 30/9-1 |
| 30/11-3 | 31/1-2 S | 31/4-10 |
| 30/3-3 | 30/6-20 | 30/9-11 |
| 30/11-8 S | 31/2-4 R | 31/5-4S |
| 30/3-4 | 30/6-24S | 30/9-14 |
| 30/11-10 | 31/2-6 | 31/5-7 |
| 30/3-10S | 30/6-26 | 30/9-20S |
| 30/11-l0A | 31/2-9 | 31/7-1 |
| 30/5-3A | 30/6-27 | 30/9-22 |
| 30/11-11S | 31/2-21 S | 31/7-3S |
| 30/6-4 | 30/6-30 | 30/9-23 |
| 30/11-12A | 31/2-22 S | 31/8-1 |
| 30/6-6 | 30/7-3 | 30/9-25 |
| 30/11-12S | 31/3-1 | 31/10-1 |
| 30/6-8 | 30/7-6 R | 30/9-28S |
| 30/11-13 | 31/3-4 | 31/11-1 S |
| 30/6-17 R | 30/8-3 | 30/10-7 |
| 30/11-14 | 31/4-2 | 32/4-3 S |
| 30/6-18 | 30/8-5 | |
| 30/12-2 | 31/4-9 |
