Occidental operates numerous gas processing facilities near its producing operations. These facilities typically use refrigeration and compression to eliminate water and separate hydrocarbon liquids in order to make saleable natural gas and liquid petroleum products.

Some of the largest of these facilities are located near Occidental's carbon dioxide (CO2) floods in the Permian Basin of West Texas and southeast New Mexico. These plants separate the produced CO2 from the gas, creating a saleable hydrocarbon gas and reclaiming the CO2 to use in Occidental's enhanced oil recovery projects. For example, the Century Plant in Pecos County, Texas, which began operation in late 2010, processes natural gas with high-CO2 content, yielding methane gas for the market as well as providing a major new source of CO2 for Occidental's Permian operations.