Automated mineralogy (SEM-EDS) approach to sandstone reservoir quality and diagenesis

Porosity and permeability define the reservoir quality of a sandstone. are controlled by primary sedimentary characteristics subsequent diagenetic modification. Grain size, sorting, detrital mineralogy, matrix content defined at point deposition. Bioturbation, infiltration, continued alteration reactive minerals soft sediment deformation can occur soon after deposition and, together with characteristics, these condition, or define, how will behave during burial. Diagenetic modifications include compaction, initially mechanical then chemical, mineral growth in some cases, grain dissolution development secondary pores. typically decrease as diagenesis progresses. Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) approaches be applied to study many aspects sandstone including shape, angularity content. SEM-EDS is also useful for defining quantities location pore network cements that mineralogically distinct from grains (e.g., calcite, dolomite, siderite, anhydrite). studying clay cements, especially when they patches bigger than 5–10 μm. In sandstones, not so identical quartz cement sandstones) where additional signals such cathodoluminescence (CL) may required. Macro- meso-pores quantified using but, on its own, it cannot automatically measure micro-porosity below minimum 1 µm spatial resolution approach. Mechanical key process causes porosity-loss easily SEM-EDS. Nonetheless, routine techniques, used solve most problems associated quality.