This work presents results obtained in a laboratory study investigating the possible alteration of tight limestone cores properties such as porosity, permeability, and wettability; and the effect of water shielding on a water driven slug of super critical CO2. Reservoir condition corefloods were conducted using actual rock cores and fluids obtained from a field in Abu Dhabi at 4000 psia and 250°F. Recovery from core floods and the permeability and porosity before and after the flood were measured to examine the effects of SC CO2 flood on the tight composite limestone cores. Oil samples produced in the experiments were analyzed using gas chromatography (GC) to assess the mechanism of CO2-improved oil recovery. The characteristics of relative permeability were measured prior to and after SC CO2 flood. Changes in the relative permeability characteristic were used to evaluate the effect of SC CO2 flood on the limestone rock wettability alteration. Oil/water interfacial tensions (IFT) measurements as function of pore volume injected were conducted to evaluate any possible changes in interfacial forces due to the SC CO2 flooding.
|Number of pages||15|
|Publication status||Published - 2007|
|Event||SPE 15th Middle East Oil and Gas Show and Conference, MEOS 2007 - Bahrain, Bahrain|
Duration: Mar 11 2007 → Mar 14 2007
|Other||SPE 15th Middle East Oil and Gas Show and Conference, MEOS 2007|
|Period||3/11/07 → 3/14/07|
ASJC Scopus subject areas