flow testing, page-76

No not a standard, just maths 4000 barrels expected recovery/10 or 14 days gives 280 to 400/day
The calculated flow is an average, so on a daily basis can be quite different ie the natural flow back under declining pressure was lower each hour. When 88e put out the plan the higher rate at step 1 is implied due to gas lift beginning. Gas lift both increases the driving force from the reservoir and lifts it out of the production tubing.
The key principle being engaged is greater differential pressure will overcome the resistance that prevents the gas escaping from the rock faces and removal of water that acts as a seal at the rock to fracture interface