Light and tight oil formations exhibit significantly different properties and flow behaviour as compared to more conventional reservoirs. Due to the extremely low permeability and poor connectivity, the tight oil production rate can drop to 10 per cent of its peak value after the first year, with an ultimate primary recovery of only 3 to 10 per cent of the original oil in place. Improved and enhanced oil recovery (IOR and EOR) and well stimulation technologies are needed to boost the economic value of tight oil reservoirs.
However, mature EOR technologies encounter new challenges when applied in tight oil reservoirs. Conventional laboratory investigation techniques are often inadequate for studying the unique properties of the tight formations and can yield misleading results. We need better tools to understand reservoir characteristics such as reservoir fluid properties, geophysical properties, geomechanical properties and geochemical properties. These key concepts are essential for a successful reservoir production strategy.
This presentation discusses new approaches, laboratory techniques and tools to evaluate petrochemical and petrophysical properties and flow mechanisms of fluid-rock systems with extreme permeability contrast, including fluid flow and mass transfer between the matrix and fractures.