Eriksfiord interprets cores as a part of reservoir characterization and calibrates them with borehole images and wireline logs. Focus is on rock type, sedimentological and structural elements, cementation, grain size, staining and depositional key surfaces. As small-scale sedimentary structures cannot always be identified in borehole images, cores may serve as an important indicator and calibration point for facies analysis and ultimately the evolution of depositional environments.
Recognising flooding surfaces in cores, for example, enables us to build sequence stratigraphic models and correlate systems tracts. Trace fossils are important palaeo-environmental indicators and when attributed to an ichnofacies type, they can provide crucial information about the depositional milieu.
Results are presented as stand-alone core description panels as well as fully integrated plots together with additional results from borehole images and petrophysical or spectral logs.
We orient 360-degree CT-scans with the help of borehole images and then use them to manually dip pick the now spatially oriented core. Alternatively, we can map core fracture patterns using circumferential transparencies from which dips can be computed (core goniometry). Core images provide higher dip and textural resolution beyond the borehole image scale; in fact, some features invisible in the physical core are revealed by CT-scans.