The present work focuses on the upper Cretaceous (Cenomanian-early Campanian) carbonate successions in selected wells from northwestern Iraq. These are represented by Gir Bir Turonian), Wajna (late Santonian) and Mushorah (early Formations. succession has affected early burial near-surface, unconformity-related deep diagenesis cementation, neomorphism, dolomitization, dedolomitization, silicifi...

Abstract Core samples were collected from three wells, one onshore and two offshore, Qatar’s Upper Jurassic Arab D reservoir. The subjected to multiproxy petrographic chemical analyses identify their micro- nanoporosity types understand evolution destruction. Based on the petrophysical properties of studied rocks, succession was divided into seven rock types. Primary microporosity includes inte...

The microfacies analysis and porosity evolution of the Khurmala Formation (Paleocene-Early Eocene) were studied in Gomaspan Sheraswar sections High Folded Zone, northeastern Erbil City, Kurdistan Region (N-Iraq). Lithologically, section is about 23.5 m comprised thick to massive bedded brecciated grey dolomitic limestone lower middle parts interbedding medium beds yellow calcareous shale upper ...

The shape of pores in sedimentary rocks is dependent on the geometric structure rock matrix grains. Carbonate have more complex pore types compared to clastic due effects diagenesis and depositional environment. study analyzed deposition Kais carbonate barrier lagoon environments. It categorized into inter-particle, moldic/vuggy, micro-cracks. type a directly related its stiffness shear resista...

The porosity within a reservoir rock is a basic parameter for the reservoir characterization. The present paper introduces two intelligent models for identification of the porosity types using image analysis. For this aim, firstly, thirteen geometrical parameters of pores of each image were extracted using the image analysis techniques. The extracted features and their corresponding pore types ...

Macrofossils of the inferred protist-grade organism Palaeopascichnus linearis occur stratigraphically beneath glacial diamictites ~580 Ma, Gaskiers-equivalent, Trinity ‘facies’ Rocky Harbour Formation on Bonavista Peninsula Newfoundland, Canada. These fossils significantly pre-date previously reported macrofossils from Avalonia and extend taphonomic window for moldic preservation macroscopic or...

A mature understanding of the sandstone gas reservoir in the Xiaoheba Formation in the southeastern Sichuan Basin remains lacking. To assess the reservoir characteristics and the origin of the high-quality reservoir in the Xiaoheba Formation, this paper uses systematic field investigations, physical property analysis, thin section identification, scanning electron microscopy and electron microp...