A pandemic caused by a new corona virus has spread worldwide, affecting Argentina. We implement an SEIR model to analyze the disease evolution in Buenos Aires and neighboring cities.The parameters are calibrated using number of casualties officially reported. Since infinite solutions honor data, we show different cases. In all them reproduction ratio R0 decreasesafter early lockdown, but then raises, probably due increase community circulation virus. Therefore it is mandatory reverse this...

We have developed continuous and discrete-time finite-element (FE) methods to solve an initial boundary-value problem for the thermo-poroelasticity wave equation based on combined Biot/Lord-Shulman (LS) theories describe porous thermal effects, respectively. In particular, LS model, which includes a Maxwell-Vernotte-Cattaneo relaxation term, leads hyperbolic heat equation, thus avoiding infinite signal velocities. The FE are formulated bounded domain with absorbing boundary conditions at...

Shale reservoir formations are porous rocks of low permeability composed fluid-saturated illite–smectite and kerogen layers, which behave as viscoelastic transversely isotropic (VTI) media at long wavelengths, that is, much larger than the average layer thickness. Seismic waves travelling across these heterogeneous materials induce wave-induced fluid flow (WIFF) Biot slow generating energy loss (mesoscopic loss) velocity dispersion. When saturated by two-phase fluids, presence capillary...

The main objective of chemical flooding is to mobilize the trapped oil remaining after a secondary recovery by waterflooding. This purpose achieved lowering oil-water interfacial tension and producing partial miscibility between both phases. partition among phases (phase behavior) influences all other physical properties. In particular, it affects residual saturations determining relative permeability curves. Relative permeabilities rule flow each phase through porous medium, so they play an...

Abstract Modern time-rate relations in conjunction with diagnostic plots are applied to type production curves of vertical and horizontal wells the Loma Campana Field Vaca Muerta Formation determine flow regimes appropriately estimate ultimate recovery. Additionally, this paper presents a comparison oil U.S. shale formations (Bakken, Eagle Ford Woodford) introduces new decline model: Unconventional Empirical Decline Model (UEDM). Type derived analyzing data. This applies recently developed...

This paper presents an analysis of a model for the propagation waves in poroelastic solid saturated by three-phase viscous, compressible fluid. The constitutive relations and equations motion are stated first. Then plane wave determines phase velocities attenuation coefficients four compressional one shear that propagate this type medium. A procedure to compute elastic constants is defined next. Assuming knowledge modulus dry matrix, other stress-strain determined employing ideal gedanken...

This paper presents a model to describe the propagation of waves in poroelastic medium saturated by three-phase viscous, compressible fluid. Two capillary relations between three fluid phases are included introducing Lagrange multipliers principle virtual complementary work. approach generalizes that Biot for single-phase fluids and allows determine strain energy density, identify generalized strains stresses, derive constitutive system. The kinetic dissipative density functions obtained...

Abstract In the last decade many efforts have been devoted to obtain a more reliable prediction of reservoir behavior by including in numerical simulators better characterization rock heterogeneities. this paper we study influence permeability and porosity spatial variations on well test pressure response. With aim, simulator oil flow towards well, which includes radial both properties, is applied. Field synthetic data are analyzed. Heterogeneities statistically characterized. Besides,...

Abstract The objective of this work is to present a novel methodology – Hybrid Method - estimate reserves and resources in mature fields. consists combining the probabilistic reserve estimation by volumetric method with Arps´ decline curve analysis, also including approach. understanding managing uncertainties are two most important problems oil industry, because final figures might add value capital company influence economy country. best way deal hydrocarbon place EUR estimations assign...

Abstract The use of geostatistics is becoming recognized as a standard means representing reservoir heterogeneity, Geostatistics has enjoyed an extensive and fairly well developed theoretical base. This little less true simulated annealing (SA), the form tested here, but it also mature technology. Yet there remains need to exercise these procedures under actual conditions nonuniformly sampled data, non-Gaussian distributions truncated data sets. Providing insights into how deal with...

Abstract An inverse method is described for simultaneously obtaining relative permeability and capillary pressure curves from measurements taken during an unsteady state oil-water flow experiment at the laboratory. This algorithm has four basic components: 1) IMPES finite-difference numerical simulator of through core; 2) functional representations-power law models or piece-wise linear splines-of in terms a set adjustable parameters found by minimizing objective function; 3) function, formed...

Abstract We present an autocorrelation estimator based on the dispersion variance (DVA) as alternative to classic semivariogram (CSV) used in Geostatistics determine spatial distributions of reservoir rock properties. evaluate DVA behavior with 2-D synthetic and field data sets, we compare its performance that CSV. turns out reliable estimate anisotropy two dimensions, it is more efficient than very smooth easy fit a theoretical model. also use set porosity measurements cross-validation...

Storage of CO2 in geological formations is a means mitigating the greenhouse effect. Saline aquifers are good alternative as storage sites due to their large volume and common occurrence nature. The first commercial injection project that Sleipner field Utsira Sand aquifer (North Sea). Nevertheless, very little was known about effectiveness sequestration over long periods time. In this way, numerical modeling seismic monitoring an important tool understand behavior after make term...

Summary This paper presents the application of multiphase fluid flow simulator BOAST to model hydraulic fracturing in unconventional reservoirs. By injecting fluids into a reservoir, pore pressure increases and set fractures are generated creating pathways where hydrocarbons can producing well, enhancing oil or gas recovery. To simulate fracture propagation, it is considered that, once becomes greater than breakdown on certain cell, that cell fractured micro-seismic source. Consequently,...