Mishrif carbonates facies and diagenesis glossary, South Iraq microfacies investigation technique: types, classification, and related diagenetic impacts

The Mishrif multi-carbonates factory in the North-Rumaila and West-Qurna oil fields is taken a prototype model to appraising the facies types, classification, and related most important diagenetic impacts on pore evolution, for the other depositional areas of the southern regions of the Mesopotamian basin of Iraq. This stratigraphic tool is exclusively concerns the high-resolution (HR) microfacies analytical methodology, diagenesis versus pore system evolution and classification terminology for the Mishrif multi-carbonates, from stand point of the local-to-regional environmental settings. The HR microfacies/diagenetic inquiry is basically presented on the essential litho-faunal compositional items per environmental aspects, graded from distal-outer ramp through shallow open-marine depositional ecozones to fore-shoal/bioaccumulated rudistid banks passing back-shoal/open-shelf lagoonal/restricted inner-shelf settings. The shallowing-upward buildups of the pore system/diagenetic impacts as per poro-perm consideration; it has taken into special interest from reservoir geology/modeling purposes point of view. The local-to-regional framework/lateral distribution framework of the buildups is taken in to special consideration as well. The methodological technique used in this study; arranged in a combined issue to be a supportive utility for the chrono-sequence stratigraphic inquiries of this important Cenomanian to early Turonian carbonate succession in the southern Iraqi oil fields. This lexicon has covered the most important planktonic/smaller to larger benthonic foraminifera and associated most particular molluscs and algae database, from stand point of biozonation and biostratigraphic buildup and related environmental aspects.