f Effective Petrophysics models leading to Business Decisions

The business decision for this exercise is “Where to drill an infill well?”. It is proposed that the key petrophysical consideration involves the evolution of subsurface realisations combined with lessons learned during the production life of the field as shared between the subsurface team. Attention is paid to three key learning points: • What did the team “know” prior to first production and how has subsequent drilling and production changed the understanding of the reservoir? • How does the current understanding influence the decision for the infill well location? • How to react to the unexpected during drilling of the infill well?