Microfacies Analysis and Depositional Environment of the Mishrif Formation at Selected Wells in E Oilfield, Southren Iraq

The Mishrif Formation is an important succession that was deposited during the Cenomanian–Early Turonian. More than 79 thin sections of core in addition to well log data for from 2 boreholes within E oilfield (E-1, and E- 2) were used determine different associations facies interpret depositional environment Formation. Six major microfacies diagnosed Formation, Mudstone, Wackestone, Packstone, Grainstone, Boundstone, Rudstone ten submicrofacies include: Bioclastic Packstone with rich Echinodermat, Coral Rudist fragment high Dolomitization, large vug porosity , Boundstone very coral, Plankton Foraminiferal withe Globigerinelloides Calcispheres, Wackestone dolomite calcareous algae, Peloidal pillites, pieces Separate-Vug pore, Grainstone submicrofacies, Benthonic Mudstone fragmented Mudstone. These restricted, shoal, shallow open marine, rudist bioherm, deep marine environments.