Near-wellbore Problems

Reservoir-related Problems

Casing leaks

Coning or cresting

Channel behind pipe

High permeability streaks

Shutting- off perforations

Fracturing job went to water zone

Lost circulations while drilling/work over

Watered-out zone

Completion into water zone

Channel from injector

Temporary chemical isolation

Fractures, fissures, voids, and conduits