Maximising reservoir information from conventional cores – case study 1

Andrew ThurlowPrincipal Reservoir Geologist

IchronUnited Kingdom

6th June 2014

Case Study 1 – Jurassic, UK North Sea

Northwich

66 wells described, >15,000’ core

Case Study 1 – Jurassic, UK North Sea

Case Study 1 – Jurassic, UK North Sea

Case Study 1 – Jurassic, UK North Sea

Well shown in previous slide

Case Study 1 – Jurassic, UK North Sea

Case Study 1 – Jurassic, UK North Sea

Exaggerated Vertical Scale No Horizontal Scale

>3300ft

Un-Swept Rannoch Fm.

Water Swept Broom Fm.

Water Swept Etive Fm.

c.40

ft

Case Study 1 – Jurassic, UK North Sea

Case Study 1 – Jurassic, UK North Sea

Conclusions

Sedimentological re-description of a historic core database underpinned the building of a field-scale depositional model for a relatively thin reservoir unit with significant volumes of unswept oil in a late-life giant field.

Depositional model de-risked uncertainty over distribution of moderate-high reservoir quality zones.

This allowed a dedicated production well to be planned and drilled.

Results of the well were highly cost-effective.

Ichron gratefully acknowledge the support of exploration companies licencing our regional UK, Norwegian & Brazilian

multi-client reservoir quality studiesplus

Centrica Energy & CNR for permission to show data from the North Coast Marine Area and Ninian Field respectively.

Thank you for listening