Publications

CO2 flooding has been applied successfully as the primary development method for low-permeability reservoirs in China. Production response from CO2 injection has been encouraging and the expectations have been exceeded in some existing projects (Winzinger et. al., 1991), (Ring, 1995). D oilfield is a typical low-permeability reservoir, the studies demonstrate an incremental 10% of original oil in place was recovered by using CO2 flooding. This working program includes: (1) integrated reservoir characterization, (2) CO2 flooding mechanism in low-permeability reservoir, (3) oilfield development plan and design, (4) dynamic monitor and performance analysis. (5) economic analysis. The study results were applied to guide the development of D oilfield in 2008. After the application of CO2 flooding, the average daily oil production rate per well increases up to 45 bbls from 28 bbls and water cut decreases from 53% to 22%. Economic analysis indicates CO2 flooding in this oilfield is cost effective and successful.