North Sea Graben Salinity Database

A salinity catalogue based on analysis of water gradients in the UK, Norwegian and Danish North Sea, for stratigraphic horizons from Eocene to Permian.  A valuable resource for petrophysicists and others for calculating Rw in all main hydrocarbon reservoirs.  Completed: 2007

The database comprises the most extensive set of salinity data for Central North Sea ever published.

Benefits

• A new and expanded source of Formation Water Salinity for hydrocarbon saturation analysis for the Central North Sea
• Comparisson with other, more limited publicly available sources

The database is invaluable for:

• calculation of water resistivity (Rw) for hydrocarbon saturation analysis
• aiding the understanding of vertical and lateral fluid flow
• understanding the role of overpressure in generating conduits to migration by fracturing

The database of 358 wells provides not only a high quality set of salinities and water gradients, but also the input data used in their derivation. The raw data has been filtered in stages and corrected for subsurface pressure and temperature.

Deliverables

• A high quality set of salinities derived from subsurface water gradients for 223 wells in the UK, Norwegian and Danish North Sea.
• Salinity Data organised by stratigraphic horizon from Eocene to Permian.

The information is provided as a hard copy spreadsheet and also on CD, and includes the input data from which the salinity values were derived.

Well established water gradients based on RFT, MDT-type direct pressure measurements have been used to reveal water salinities, after having been corrected for subsurface pressure and temperature.

The salinities compare favourably with published Rw and salinity values from several key publications.

Complete our Pressure Study Request Form to find out more about purchasing your own copy of the North Sea Central Graben Salinity Database.