 The APR contains data for over 300 permanently abandoned wells, mainly situated in Europe.In 2011 the Interventions Performance Review (IPR) was initiated after new products and services available in the industry increased the productivity of interventions for some participants of other Reviews, yet there was no performance benchmarking available in this area.The Shale Performance Review (SPR), starting in 2012 contains information on the drilling, completion and frac'ing of offset multi-stage frac’ed wells.