This study evaluates the unconventional reservoir geomechanical characteristics of Lower Turonian Abu Roash-F (AR-F) carbonates from Gharadig field, onshore Egypt, which has not been attempted before. The interval dominantly consists planktic foraminifera and micrite matrix. AR-F marine carbonate is organic-rich (0.59–3.57 wt% total organic carbon), thermally mature (435–441°C T max ) falls wit...

Recently, 15.1 billion tons of shale oil geological resources were discovered in the Qingshankou Formation Gulong Sag, Songliao Basin, and this discovery has attracted considerable attention. Thus far, sedimentary environment diagenetic process particularly reservoir space accumulation mechanism oil, are unclear, which seriously affected exploration development oil. Based on detailed core thin ...

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...

Understanding the development of calcic and petrocalcic horizons is important for palaeoclimate reconstruction. The micromorphology and geochemistry of Quaternary calcic and petrocalcic horizons formed in the area around Coimbatore, Tamil Nadu are discussed. The calcic horizons represent the Bk horizons that occur as thick complex profiles ( 300 cm thick) in the foothill regions while the lamin...

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...

Abstract There is a fundamental interest in studying travertine rocks, and this to understand their structure, geomechanical behavior other particularities order guarantee proper use different engineering architectural applications, thus, evaluate the sustainability of travertines, natural resources, stability slopes, preservation cultural heritage mitigation possible anthropic risks. Travertin...

Lithostratigraphy and microfacies analysis of the Avanah Formation (Middle Eocene) were studied in Gomaspan section Bina Bawi anticline, northeast Erbil city, Kurdistan Region, Iraq. The field observations refer that formation attains 56 m medium to thick bedded yellow limestone, grey dolomitic limestone blue marly interbedded with thin beds marl dark shale an interval sandy middle part red mud...

Modern and Cenozoic deep-sea hydrothermal-vent and methane-seep communities are dominated by large tubeworms, bivalves and gastropods. In contrast, many Early Cretaceous seep communities were dominated by the largest Mesozoic rhynchonellid brachiopod, the dimerelloid Peregrinella, the paleoecologic and evolutionary traits of which are still poorly understood. We investigated the nature of Pereg...

Hardgrounds represent synsedimentary cemented stratigraphic beds that form at or near the seafloor. Borings a key line of evidence for investigations hardground development and record evolution bioerosion boring organisms. The unequivocal identification borings is done through crosscutting relationship between proposed hard substrate, such as lithoclasts and/or shells, with morphological criter...

Palaeonitella trifurcata n. sp. is a minute ecorticate thallus of charophyte from non-marine upper Barremian–Lower Aptian section the Garraf Massif, near Barcelona (Catalonia, Spain). Whorls trifurcated branchlets built glomerules about 1 mm across. Small radial were once in three terminal acuminate dactyls. Longer and more robust branches, two per whorl emerge basal trifurcation, bore opposite...