Changes

Water saturations determined on sidewall cores from gas condensate zones are generally 10 to 15% higher than values from conventional cores. In oil zones, the water saturation from sidewall cores may be 5 to 10% higher relative to conventional core values ([[:file:overview-of-routine-core-analysis_fig1.png|Figure 1]]).

Water saturations determined on sidewall cores from gas condensate zones are generally 10 to 15% higher than values from conventional cores. In oil zones, the water saturation from sidewall cores may be 5 to 10% higher relative to conventional core values ([[:file:overview-of-routine-core-analysis_fig1.png|Figure 1]]).

The agreement between sidewall and conventional core residual oil saturations varies with oil characteristics. When oil gravity is in the range of 35° to 40° API, sidewall core oil saturation values are slightly lower than those obtained by conventional core analysis. As oil gravity and viscosity increase, sidewall core oil saturations become 10 to 20% lower than conventional core saturations.<ref name=pt05r38 /> In gas condensate zones, sidewall cores have measured oil saturations that are equal to or a few percent higher than conventional core values ([[:file:overview-of-routine-core-analysis_fig2.png|Figure 2]]).

The agreement between sidewall and conventional core residual oil saturations varies with oil characteristics. When oil gravity is in the range of 35° to 40° API, sidewall core oil saturation values are slightly lower than those obtained by conventional core analysis. As oil gravity and [[viscosity]] increase, sidewall core oil saturations become 10 to 20% lower than conventional core saturations.<ref name=pt05r38 /> In gas condensate zones, sidewall cores have measured oil saturations that are equal to or a few percent higher than conventional core values ([[:file:overview-of-routine-core-analysis_fig2.png|Figure 2]]).

==Porosity==

==Porosity==

[[Category:Laboratory methods]]

[[Category:Laboratory methods]]