Petroleum Technology Digest: Oxy Permian’s Cogdell Unit responds rapidly to CO2 injection ///

Oxy Permian, Ltd. (Oxy) is using CO2 flooding to rejuvenate production in the Cogdell Unit, a Pennsylvanian Carbonate Reef field north of Snyder, Texas. Fast response is typical of high permeability reservoirs, but the blessing comes with reservoir management and sweep-intervention challenges to assure that the CO2 sweep is efficient and lasting. Oxy uses an active reservoir surveillance program and makes sweep/profile modifications where necessary. Phase 2 development is planned during 2003. Assuming continuing success of the CO2 flood, field life could be extended 25 years and add over 20 million barrels of oil recovery.

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