Attic Oil Recovery

Society of petroleum engineers.

Attic oil recovery.

This paper presents a gulf of mexico field case study describing the use of horizontal wells to improve oil recovery in thin attic oil strong waterdrive reservoirs. Recovery of this attic oil in geologically complex reservoirs with conventional vertical or directional wells is in general not cost effective because of the reduced vertical column of oil in place and the ease of water coning. The oil cannot be recovered with the internal process piping due to the design of the cell outlet piping and the fact that oil is buoyant on water. Gulf of mexico horizontal well improves attic oil recovery in active waterdrive reservoir.

Attic oil reservoir recovery method. In a conventional attic oil reservoir recovery program wherein gas is injected through a well into an attic reservoir the gas then migrating updip and displacing oil downward to the producing interval in the well wherefrom the oil is then produced the improvement is added wherein at the completion of the gas injection step a water excluding agent is injected into the reservoir in the immediate vicinity of the well bore which prevents the formation water. Brimmond group have recently completed the design manufacture and testing of an atex zone 1 category 2 attic oil recovery system for a global operator s decommissioning project. The beds are usually dipping at a high angle.

Newer research on residual oil zones has shown enough promise that researchers claim it could unlock 800 billion even a trillion new barrels to recovery just in the permian basin. In a conventional attic oil reservoir recovery program wherein gas is injected through a well into an attic reservoir the gas then migrating updip and displacing oil downward to the producing interval in the well wherefrom the oil is then produced the improvement is added wherein at the completion of the gas injection step a water excluding agent is injected into the reservoir in the immediate vicinity of the well bore which prevents the formation water from restricting the flow of oil.