Porosity, Cementation, Diagenesis and Their Influence on the Productive Capability of Sandstone Reservoirs in the Sava Depression (Croatia)

• Main Authors: Jasna Tadej, Željka Marić-Đureković, Renata Slavković
• Format: Article
• Language: English
• Published: Croatian Geological Survey 2010-11-01
• Series: Geologia Croatica
• Subjects: Secondary porosity; Cementation; Diagenesis; Reservoir quality; Petrography; Sedimentology
• Online Access: http://www.geologia-croatica.hr/ojs/index.php/GC/article/view/389

<div>The sandstone reservoirs in the Sava depression lost their primary</div><div>porosity through compaction and cementation in the carly stage of</div><div>diagenesis. Dissolution events enlarged porosity and created reservoirs that were composed mainly of secondary porosity, but some&nbsp;zones of these reservoirs were destroyed by precipitation of late Ferich calcite and dolomite cement. Three groups of sandstones differing&nbsp;in reservoir quality are identified - highly porous litharenites,&nbsp;litharenits with intermediate porosity, and weakly porous, highly&nbsp;cemented litharenites. The type of porosity depends on the clay content&nbsp;in sandstones, which is the result of water energy and depositional environment.</div>