Reserves are expected to be recovered from zones in existing wells, which will require additional completion work or future re-completion prior to the start of production.

Reserves are expected to be recovered from zones in existing wells, which will require additional completion work or future re-completion prior to the start of production.

• A. Behind-Pipe Reserves
• B. Developed Reserves
• C. Prospective Resources
• D. Contingent Resources

Answer: (A)

Reserves that already exist in the wellbore but need additional completion or recompletion work to be produced are behind-pipe reserves. This category sits inside developed reserves because the hydrocarbon is in place in existing wells and could be produced without drilling new wells, but the well must be worked over or re-completed to access those zones. The description fits exactly: zones in existing wells requiring extra completion work before production can begin. Prospective resources are volumes that may exist in undiscovered or untested areas, so they aren’t tied to current wells. Contingent resources are discoveries that have been found but aren’t yet economically or technically ready for development. Developed reserves cover recoverable volumes in existing wells with current facilities, but the specific need for completion or recompletion to access the zones points to the behind-pipe subset.

Reserves that already exist in the wellbore but need additional completion or recompletion work to be produced are behind-pipe reserves. This category sits inside developed reserves because the hydrocarbon is in place in existing wells and could be produced without drilling new wells, but the well must be worked over or re-completed to access those zones. The description fits exactly: zones in existing wells requiring extra completion work before production can begin.

Prospective resources are volumes that may exist in undiscovered or untested areas, so they aren’t tied to current wells. Contingent resources are discoveries that have been found but aren’t yet economically or technically ready for development. Developed reserves cover recoverable volumes in existing wells with current facilities, but the specific need for completion or recompletion to access the zones points to the behind-pipe subset.