Perforating plugged slotted liner would be effective in any unconsolidated sandstone reservoir containing oil that is mobile at reservoir conditions.
There are two exceptions:
1. A zone with a gas cap or evidence that solution gas has a tendency to break-out in the reservoir causing a secondary gas cap. Foamy heavy oil, although compressible, is not problematic as the micro-bubbles remain intact until exposed to atmospheric pressure plus temperatures well above reservoir temperature.
2. A zone with active bottom water as depicted in the image. Water breakthrough occurs in six to twelve months. Successful cavity completion (CHOPS) operates at maximum drawdown. Maximum drawdown accelerates breakthrough in these reservoirs leaving a substantial portion of reserves beyond reach.