Changes

The Vaca Muerta Formation with dominant organic-rich lithofacies (>2% TOC) may be up to 270 m thick. Median values within this organic-rich Vaca Muerta are 11% total porosity, 44% water saturation, 5% TOC, 28% carbonate, 30% QFP, 21% clay<ref name=Ortz />. However, the median values need to be scrutinized with accuracy because reservoir properties and fluid types vary significantly both among the six units of the Vaca Muerta-Quintuco system and within each unit ([[:file:M125-VacaMuerta-Figure12.jpeg|Figure 12]]). These variations suggest that each stratigraphic interval of interest must be addressed and analyzed as a different play type, with potentially different hydrocarbon storage, response to stimulation, and productivity ([[:file:M125-VacaMuerta-Figure13.jpeg|Figure 13]]).

The Vaca Muerta Formation with dominant organic-rich lithofacies (>2% TOC) may be up to 270 m thick. Median values within this organic-rich Vaca Muerta are 11% total porosity, 44% water saturation, 5% TOC, 28% carbonate, 30% QFP, 21% clay<ref name=Ortz />. However, the median values need to be scrutinized with accuracy because reservoir properties and fluid types vary significantly both among the six units of the Vaca Muerta-Quintuco system and within each unit ([[:file:M125-VacaMuerta-Figure12.jpeg|Figure 12]]). These variations suggest that each stratigraphic interval of interest must be addressed and analyzed as a different play type, with potentially different hydrocarbon storage, response to stimulation, and productivity ([[:file:M125-VacaMuerta-Figure13.jpeg|Figure 13]]).

[[file:M125-VacaMuerta-Figure12.jpeg|center|framed|{{figure number|12}}Petrophysical properties of the organic-rich Vaca Muerta (TOC >2 %) per stratigraphic unit, per morpho-structural domain. Inside dashed green line maturity is above 0.8 (R° %). Horizontal scale is linear and left edge. (-) represent null values. PHIT = total porosity; SWT = total water saturation; VCARB = volume of carbonate; VCL = volume of clay; VKER = volume of kerogen; VQFP = volume of quartz, feldspar, and plagioclase (modified from Ortiz et al.<ref name=Ortz />).

[[file:M125-VacaMuerta-Figure12.jpeg|center|framed|{{figure number|12}}Petrophysical properties of the organic-rich Vaca Muerta (TOC >2 %) per stratigraphic unit, per morpho-structural domain. Inside dashed green line maturity is above 0.8 (R° %). Horizontal scale is linear and left edge. (-) represent null values. PHIT = total porosity; SWT = total water saturation; VCARB = volume of carbonate; VCL = volume of clay; VKER = volume of kerogen; VQFP = volume of quartz, feldspar, and plagioclase (modified from Ortiz et al.<ref name=Ortz />).]]

[[file:M125-VacaMuerta-Figure13.jpeg|center|framed|{{figure number|13}}Vaca Muerta petrophysical model from wells in the morpho-structural domain Eastern Basin Center 2 (left) and Southern Flank (right), see domains in [[:file:M125-VacaMuerta-Figure12.jpeg|Figure 12]]. Tracks (from left to right): stratigraphic Units; gamma ray; thickness reference with dotted lines every 50 m; Passey filter; TOC (light green >2 %, dark green >4 %); total porosity (yellow >5%, v/v); volume compound of minerals and fluids; total water saturation (%, blue represents water, green represents hydrocarbon) (from Ortiz et al.<ref name=Ortz />).]]

[[file:M125-VacaMuerta-Figure13.jpeg|center|framed|{{figure number|13}}Vaca Muerta petrophysical model from wells in the morpho-structural domain Eastern Basin Center 2 (left) and Southern Flank (right), see domains in [[:file:M125-VacaMuerta-Figure12.jpeg|Figure 12]]. Tracks (from left to right): stratigraphic Units; gamma ray; thickness reference with dotted lines every 50 m; Passey filter; TOC (light green >2 %, dark green >4 %); total porosity (yellow >5%, v/v); volume compound of minerals and fluids; total water saturation (%, blue represents water, green represents hydrocarbon) (from Ortiz et al.<ref name=Ortz />).]]