Updated Regional Technology Implementation Plan for Zama
The Zama oil field in northwestern Alberta has been injecting a stream of acid gas (70% CO2 and 30% H2S) as part of an enhanced oil recovery campaign since late 2006. This operation also carries the benefits of acid gas disposal and CO2 storage. Work done under the PCOR Partnership and across multiple industries has indicated that acid gases such as CO2 and H2S can degrade reservoir and wellbore integrity. This document details several laboratory and modeling efforts to better understand these processes at work. The efforts include examining cores and seven different casing steels exposed to various concentrations of acid gas at reservoir conditions, PVT (pressure, volume, temperature) modeling to investigate the effects of gas-oil ratio (GOR) and H2S on minimum miscibility pressure, and modeling-based investigations into the storage capacity of other portions of the Zama Field.View/Download Document