Effects of Injection Gas Composition on Modified in Situ Shale Retort Economics

摘要

The effects of injection gas composition on the performance and economics of a Modified In Situ oil shale retort have been examined. The injection of air could produce oil at a slightly lower price than steam-air injection. Retort systems using steam-oxygen or carbon dioxide-oxygen are economically unattractive. A system using water and air could be economical if water addition can be controlled. Approximately one-quarter of the energy is produced as a retort off-gas that has a very low heating value. (ERA citation 06:023151)