Permeability/porosity relations obtained from core measurements and well logs from numerous sandstone

End_Page 965------------------------------

hydrocarbon reservoirs in North America were used to quantitatively study diagenetic alterations of pore systems. Results were most favorable for rocks in which no early cementation or secondary replacement occurred and for which the pore system could be characterized sedimentologically.

Geologic modeling of permeability/porosity crossplots may reveal secondary permeability that results from microstructural damage, fracturing, and/or directional dissolution. Secondary permeability type may be determined from examination of the core or porecasts. Analyses of permeability/porosity crossplots may establish the relative timing of the various diagenetic modifications.

End_of_Article - Last_Page 966------------