2/11-12 S

General

Well 2/11-12 S “West Hod Appraisal” was drilled as part of the Hod Field Development Project (HFD). The well is located on the Skrubbe Fault between the Lindesnes Ridge and the Ål Basin in the North Sea. The primary objective for appraisal well 2/11-12 S was to delineate the western part of the Hod field. The secondary objective was to examine reservoir rocks (diatomites) in the Miocene in the Hordaland group (Lark Formation).

Operations and results

A 9 7/8” Pilot hole was drilled to 540 m. No shallow gas or water flow was observed.

Appraisal well 2/11-12 S was spudded with the jack-up installation Mærsk Interceptor on 10 January 2019 and drilled to TD at 2956 m (2939 m TVD) m in the Late Cretaceous Hidra Formation. An abrupt mud loss at 2731 m MD in the lower Balder Formation was observed, with initial mud loss rate at 23 m3/hr. This mud loss was observed to rapidly diminish by 2750 m MD upon further drilling into the underlying Sele Formation. A fault is possible in this interval. The well was drilled with seawater and hi-vis pills down to 541 m and with oil-based mud from 540 m to TD.

In the primary target in the Hod formation, a limestone interval of about 120 meters with poor reservoir properties was encountered. There were traces of oil in the limestone rocks. Good shows wear recorded in the interval 2841 to 2859 (stain, direct fluorescence, cut fluorescence, and ring fluorescence), and in the intervals 2907 to 2916 m and 2937 to 2943 m (no stain, direct fluorescence, cut fluorescence, no residual ring)

In the secondary target in the Hordaland group, 200 metres of reserv