Sedimentologic and diagenetic controls on pore-network characteristics of Oligocene–Miocene ramp carbonates (Majella Mountain, central Italy)

摘要: This article addresses the controls exerted by sedimentologic and diagenetic factors on preservation modification of pore-network characteristics (porosity, pore types, sizes, shapes, distribution) carbonates belonging to Bolognano Formation. formation, exposed at Majella Mountain, Italy, is composed Oligocene–Miocene deposited in middle- outer-ramp settings. The consist (1) grainstones predominantly either larger benthic foraminifera, especially Lepidocyclina, or bryozoans; (2) packstones with abundant echinoid plates spines; (3) marly wackestones mudstones planktonic foraminifera. results this field- laboratory-based study are consistent skeletal grain assemblages, sorting, all representing responsible for high values connected primary macroporosity high-energy, middle proximal outer ramp. Cementation, porosity reduction overall macropore shape distribution intermediate ramp, was mainly dependent following factors: amount spines, size, sorting (4) clay amount. Differently, mudstones, laid down low-energy, distal matrix key factor low scattered dominance microporosity. aforementioned may be useful improve prediction reservoir quality means mapping, simulating, assessing individual carbonate facies peculiar characteristics.