In this paper we present the development of the macroscopic model describing the hydro-mechanical coupling of damaged porous media containing cracks or/and vugs, by using the asymptotic expansion method. The analysis starts at the mesoscopic scale at which we assume a generic microstructure and the validity of the Biot model in the micro-porous domain saturated by a fluid. In the crack/vug doma...

Carbonate reservoirs are a highly heterogeneous type of reservoir characterized by the presence large amount vugs and pores. During two-phase displacement, flow regime in might be gravity segregated. The distribution pattern fluid would accelerate water downward horizontal directions, meanwhile decelerating an upward direction, resulting different oil recovery ratio. This gives rise to question...

Field observations, together with the results of gas chromatography–mass spectrometry (GC-MS) and stable carbon isotope analysis bitumen, coupled fluid inclusion microthermometry analyses closely associated vug- fracture-filling columnar calcite in Upper Cretaceous Bekhme Formation, Kurdistan Region Iraq, suggest that degradation crude oil was caused by regional incursion meteoric waters. This ...

Multiphase flow phenomena are ubiquitous. Common examples include coupled atmosphere and ocean system (air and water), oil reservoir (water, oil and gas), cloud and fog (water vapor, water and air). Multiphase flows also play an important role in many engineering and environmental science applications. In some applications such as flows in unconfined karst aquifers, karst oil reservoir, proton ...

Lower Ordovician sandstones of the “Grès Armoricain” formation in Montlouis quarry near Janzé (Ille-et-Vilaine, France) display rare Fe-sulfide veins filled with a low-T (<300°C) assemblage pyrite, marcasite, “melnikovite”, trace amounts galena and sphalerite. Pyrite occur as contorted cm-scale columnar pyrite invading larger idiomorphic crystals coating vugs. It is usually overgrown by fibrora...

Objective: To characterize the fluid properties and fluid-rock interactions that are needed for formation evaluation by NMR well logging. This project is a partnership between Professor George J. Hirasaki at Rice University and Professor Kishore Mohanty at University of Houston. In addition to the DOE, a consortium of oil companies and service companies supports this project. The advances made ...

A peculiar slab of brachiopod coquina was found at Fenyveskút locality (Lókút, Bakony Mountains, Hungary). The current investigation demonstrated that it a mass occurrence monospecific brachiopods which belong to the kingenoid genus Arzonellina Sulser, 2005, recently described from Switzerland. Detailed investigations external and internal morphology (the latter by serial sections) specimens pr...