Characterization of flow units, rock and pore types for Mishrif Reservoir in West Qurna oilfield, Southern Iraq by using lithofacies data

Abstract This study has been accomplished by testing three different models to determine rocks type, pore throat radius, and flow units for Mishrif Formation in West Qurna oilfield Southern Iraq based on full diameter cores from 20 wells. The that were used this Lucia type classification, Winland plot was utilized the radius depending mercury injection test (r35), (FZI) concepts identify which enabled us recognize differences between these categories. of characteristics is very significant reservoir evaluation. It controls storage mechanism fluid properties permeable while structure a critical controlling factor petrophysical multiphase-flow rocks. Flow zone indicator hydraulic approach (HFUs). Each (HFU) reproduced certain FZI supposed have similar geological properties. samples four lithofacies, mA, CRII, mB1, mB2. Because wide range cored-wells (20 wells), paper updated previous studies indicated some resulting noticed as results types lower mostly ranged wackestone packstone upper part mB2 reflected mid-ramp facies referred shoal mB1 unit grainstone with points marked rudist bioherm facies. Grainstone relatively decreases increasing depth same direction. mA mesopores macropores, megapores macropores feature increased northern due facies, revealed mesoporous decreasing megaporous. (mA) units, (mB1, mB2) eight each unit.