the sorkh shale formation (lower triassic) crops out in parts of tabas block. this formation is composed of limestone, dolomite, sandstone, shale and gypsum. its lower contact with the permian rocks and its upper contact with the shotori formation is marked by distinct erosional unconformity. to determine the depositional environments of the sorkh shale formation, stratigraphic sections of goda...

The climate of Mars likely evolved from a warmer, wetter early state to the cold, arid current state. However, no solutions for this evolution have previously been found to satisfy the observed geological features and isotopic measurements of the atmosphere. Here we show that a family of solutions exist, invoking no missing reservoirs or loss processes. Escape of carbon via CO photodissociation...

Several countries, including Canada, contain sizeable bitumen resources in highly fractured carbonate rocks. Any possible recovery of bitumen from these reservoirs will be highly dependent on proper understanding of the rock and fluid properties and how they vary in the reservoir. These carbonates are extremely heterogeneous, and as a result proper reservoir characterization is challenging. In ...

A precise identification of pore fluid pressure (PP) is great significance, specifically, in terms drilling safety and reservoir management. Despite numerous work have been carried out for prediction PP oil reservoirs, but there still exists a tangible lack such gas hosting rocks. The present study aims to discuss evaluate the application number existing methods two selected giant carbonate res...

Introduction In Western Canada the application of CO2 injection for enhanced, ‘tertiary’ oil recovery is a relatively recent addition to the arsenal available to reservoir engineers. The first successful application of CO2 as a miscible fluid in Western Canada began in 1984 at Joffre Field, a Cretaceous marine siliciclastic reservoir in southern Alberta. A significant portion of the remaining p...

wettability alteration is one of the most important methods for oil recovery from sandstone andcarbonate reservoirs. the effects of salinity, ph, temperature, and chemicals such as surfactants andfatty acids on the alteration of the wettability were described in previous studies. in recent years,attention has been directed to nanoparticles as a wettability alteration agent. the effect of somena...

Abstract Western Tethys sedimentary successions constitute fundamental archives of Late Triassic–Early Jurassic environmental, carbonate production and tectonic changes. During the Triassic, Northern Calcareous Alps (Austria) belonged to passive margin, characterised by deposition early-dolomitized peritidal Hauptdolomit (Norian) adjacent basinward Dachstein shelf passing upward mixed carbonate...

The stable carbon isotopic compositions of carbonate sediments (?13Ccarb) have been widely used to reconstruct the global cycle and as a stratigraphic correlation tool. This work investigates ?13Ccarb record marine organic-rich, mixed siliciclastic?carbonate mudstones accumulated from Tithonian (late Jurassic) early Valanginian (early Cretaceous) in retro-arc basin connected Proto-Pacific Ocean...

The Class 2 Project at West Welch was designed to demonstrate the use of advanced technologies to enhance the economics of improved oil recovery (IOR) projects in lower quality Shallow Shelf Carbonate (SSC) reservoirs, resulting in recovery of additional oil that would otherwise be left in the reservoir at project abandonment. Accurate reservoir description is critical to the effective evaluati...