RE: 101 10230 Dec 2018 10:37
jester16
It costs the same amount to side track and drill deeper, then to drill a fresh new well. The pipe and casing on old wells may not be in the best condition either, over the years you can have faults on formation and casing. Remember that the old wells are over 10 years old, and a lot of tech has changed in that time in the o+g industry.
The benefit of a new well is you are intersecting a virgin pay zone and pressure. Each horizon is new on a new well and you have the options to perforate from the bottom up through the life of the well.
For example if we hit djeno, then perforation and production will start there until it is exhausted, then it will be perforated in mengo, then horizons above and then R zones over the years. That way you are getting oil from all horizons in a controlled manner.
In this modern age, forget the old wells, save for a small amount of work overs to get a few bopd added for free to main export. New wells, new formations, new pip, new casing, modern perforation and lift. If they want to become a major on this field, this is the only way forward.