PTA is an Exploitation tool when we draw isobaric pressure maps. Maps are a pool tool — you must have several wells in the same formation, with appropriate tests, and qualified PTA data, to draw maps. Notwithstanding, good maps can help optimize primary well spacing, drainage, and ultimate recovery economics. In other words, maps help identify infill drill prospects as much as highlight where not to drill. Maps are critical to secondary and tertiary recovery schemes, in both pressure maintenance and blowdown phases. Pressure surveillance schedules should employ opportune and systematic planning (plant turnaround, regular maintenance shut-downs, workovers, pump changes), with consistent analytical methodology applied to the PTA (i.e. develop in-country value hiring smart technologists and engineers).