Determining saturation and pore pressure is relevant for hydrocarbon production as well natural gas [Formula: see text] storage. In this context, seismic methods provide spatially distributed data used to determine fluid migration. A method developed that allows the determination of reservoir from data, more accurately rock-physics attributes velocity, attenuation, density. Two models based on ...

The fluid flow in the runner of a hydraulic turbine has serious uncertainties. sealing failure magnetorheological (MR) device main shaft hydroturbine, caused by sudden change speed, always been difficult topic to research. This study first derives MR seal pressure and unbalanced curl equations hydroturbine shaft, then analyzes friction heat under different rotational speed mutation conditions t...

My answer to all these questions is: Use the concentration of titratable hydrogen ion in the extended extracellular fluid (at the actual oxygen saturation), ctHEcf, as the relevant measure of an overall metabolic acidosis or alkalosis, which may be due to several cooperative or counteractive pathophysiological processes. ctHEcf and SBE are numerically equal, with opposite sign, but it is the hy...

in this paper, a finite element model is developed for the fully hydro-mechanical analysis of hydraulic fracturing in partially saturated porous media. the model is derived from the framework of generalized biot theory. the fracture propagation is governed by a cohesive fracture model. the flow within the fracture zone is modeled by the lubrication equation. the displacement of solid phase, and...

Predicting the permeability of porous media in saturated and partially conditions is crucial importance many geo-engineering areas, from water resources to vadose zone hydrology or contaminant transport predictions. Many models have been proposed literature estimate properties such as porosity, grain size pore size. In this study, we develop a model for by one two fluid phases with all physical...

By using the data of logging, cuttings thin section identification and analysis in study area to four characteristics Nantun Formation reservoir their relationship, lower limit standard effective physical property is established by logging interpretation model mud content, porosity, permeability saturation, mercury injection method, oil production test method cumulative frequency statistics met...

The multifractal structure of shale pores significantly affects the occurrence fluids and permeability reservoirs. However, there are few studies on characteristics that distinguish between organic inorganic pores. In this study, we obtained pore size distribution (PSD) separately by using a new NMR-based method conducted analysis based PSD. We then investigated geological significance two char...

Both osmotic and matric suction changes have a significant influence on the mechanical behaviour of clays. Despite different types interactions at microstructural level, both suctions havea relevant effect fabric non-expansive Starting from experimental observations laboratory scale, it is possible to identify some common features characterizing response clays salinity degree saturation changes...

We report on two microfluidic elastomeric autoregulatory devices-a diode and a rectifier. They exhibit physically interesting and complex nonlinear behaviors (saturation, bias-dependent resistance, and rectification) with a Newtonian fluid. Due to their autoregulatory properties, they operate without active external control. As a result, they enable increased microfluidic device density and ove...

An alternative way of utilizing the thermodynamic perturbation theory Wertheim for development equations state associating fluid models is presented and detailed water. The approach makes use general features parameter non-saturation to avoid necessary solution an algebraic equation unbinds results from a tight dependence on details simple reference model used in theory.