Porosity Prediction
During Ratcliffe deposition, paleo-anticlines were probably shallow areas on the self which allowed preferential development and deposition of burrowed facies (Facies 3) and subsequent dolomitization by gravity-induced seepage of magnesium-rich brines. Localization of porosity along these paleo-structures was enhanced by later structural deformation and associated fracturing. Better Ratcliffe production is more likely to occur along the flanks of present day and paleo-structures because the main reservoir facies is thicker. Between structural noses and within synclines, the burrowed sediments were replaced by a facies change and which consists of skeletal lime wackestones and packstones with poor porosity and permeability.