2/5-15

General

Well 2/5-15 was drilled to test the Gomez prospect north of the Tor Field on the Steinbit Terrace in the North Sea. The main objective of the well was to investigate the presence of hydrocarbons in the Rogaland Group with the Ty/Heimdal Formations and/or Borr sandstone Member in the Lista and Våle Formations as the primary reservoir target.

Operations and results

Wildcat well 2/5-15 was spudded with the semi-submersible installation Borgland Dolphin on 7 August 2021 and drilled to TD at 3323 m in the Paleocene age Ekofisk Formation. Thirty-five hours were spent fishing for stuck wire line equipment during logging operations, otherwise operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 596 m, with Versatec oil-based mud from 596 m to 3115 m, and with Exploradril oil-based mud from 3115 m to TD.

Well 2/5-15 encountered oil in the primary target in the Våle Formation, 23 metres of which was homogeneous andstone of poor reservoir quality. The oil/water contact was not encountered. Initial analysis indicated significant uncertainty regarding the oil mobility. Post-well studies concluded that the well encountered sands with low effective porosity and non-producible hydrocarbons. Shows on the core from the intra-Våle Formation sandstones were described as "very faint odour, poor patchy light brown oil stain, even to patchy moderate yellow direct fluorescence, moderate to fast streaming bluish white cut fluorescence, moderate cream residual fluorescence". Otherwise, here were no oil shows above the OBM in the well.

One 19.12 m core was cut from 3223 m in intra- Våle Formation sandstone (Borr informal Member) and into m