As part of the Data Purchase tender process (TRN097012017) that was carried out during Q1 2017, the NSTA has purchased CGG’s joined digital well logs (JDWL), deviation surveys and time-depth curves for approximately 900 UKCS exploration and appraisal wells. An additional number of joined digital well logs is being released in support of the 31st Frontier Licensing Round. As with the joined digital wells logs released for the 30th Licencing Round, the NSTA purchased these additional wells from CGG with full publication rights. This delivery also includes a number of corrections for those who have received the initial delivery. To make the corrections, open the Re-Delivery folder and replace the well folders in the original with the re-delivered wells.