Gas cap monitoring in high flow rate, low porosity clastic reservoirs in clolmbia gives big economic returns

摘要

Cased hole neutron logging has been around for a long time and is oftne used to monitor gas movement in reservoirs behand pipe. This often works well in high porosity reservoirs but is rarely successful in low porosity reservoirs. In Colombia, there are high flow rate reservoirs with significant permeability, that have low porosity (5-6 PU).