Date The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. ABSTRACT This study identifies, characterizes, and analyzes the pore systems of the Niobrara Formation, and explores the linkage between measurable rock properties and the observed pore...

The calcareous microfossils present in the Ordovician and Silurian carbonate successions around world are limited to few studies their biological affinities environmental preferences remain indefinite. In San Juan Formation from Cerro La Chilca section, a group of was recognized and, based on size, they included calcitarch classification. Two types calcitarchs have been recognized, Type-III cal...

The rock successions of the Chia Gara Formation were studied at two surface sections (Barsarin and Rania) from North-Eastern Iraq. detailed sedimentological study reveals that formation consists basically thin-bedded black limestone, dolomitic marly bituminous shales, Ammonitic limestone. petrography results showed various petrographic components as Ammonites, calcispheres, radiolarian, silicat...

Four supergiant and numerous giant gasfields have been discovered in the Southwest Iran which produce from Permian-Triassic carbonates belong to the upper member of Dalan Formation and Kangan Formation. In this research a detailed biostratigraphic, microfacies and sequence stratigraphic study of the late Middle Permian to Triassic successions was undertaken from 850 thin sections prepared from ...

The Cretaceous pelagic carbonate succession, i.e., Goru Formation was studied in the Chutair Section, Sulaiman Range, representing part of eastern Tethys for paleoenvironment and bio-sequence stratigraphy. Eight planktonic foraminiferal biozones are identified which include: 1. Muricohedbergella planispira Interval Zone; 2. Ticinella primula 3. Biticinella breggiensis 4. Rotalipora appenninica ...

The largest Precambrian gasfield in China has been found from the Ediacaran (Sinian) carbonates central Sichuan Basin. deep ancient reservoirs were generally attributed to high-energy mound-shoal body carbonate platform. However, there is still little understanding on distribution of bodies that hampers further gas exploitation subsurface. Based seismic data, a large strike-slip fault system wa...

The Sa’adi Formation is a part of the late Cretaceous period in Santonian-Campanian stage that represents potential hydrocarbon-bearing reservoir across many oilfields Mesopotamian Basin, South Iraq. was divided into two main parts as stratigraphy sequence. It consists chalky limestone with argillaceous upper and marly lower part. considered an important stratigraphic unit marked by petroleum s...