Tight gas reservoirs are often defined as gas-bearing sandstones or carbonates having in-situ permeabilities to less than 0.1 mD (Holditch, 2006; Smith et al., 2009). reservoir rocks can be at different physical conditions: deep shallow; over- underpressured; high temperature low temperature; and under stress states. The reservoir-forming rock have textures such shaley silty unconsolidated clean-cemented sandstones. These produce rates. blanket lenticular, homogeneous heterogeneous, contain...

Este artículo evalúa el desempeño de morteros y hormigones basados en mezclas escoria siderúrgica (GBFS)/metacaolín (MK), activadas alcalinamente expuestos a temperaturas altas.Se identifica una elevada estabilidad con contenidos MK hasta un 60% cuando se exponen 600 ºC, resistencia residual 20 MPa posterior la exposición esta temperatura.Por otra parte, más elevadas conduce al agrietamiento los como consecuencia contracción matriz cementante las restricciones por efecto áridos,...

Can a theoretical inclusion model — specifically, the differential effective medium (DEM) match experimental velocity data in rocks that are not necessarily made of inclusions, such as clastics? It is indeed possible some cases by using an almost constant aspect ratio (AR) within wide ranges porosity and mineralogy. We approach this question empirical velocity-porosity equations proxies for data. By finding DEM AR to these equations, we find required range narrow. Moreover, about 0.13 can be...

We offer an effective-medium model for estimating the elastic properties of high-porosity marine calcareous sediment and diatomite. This treats as a pack porous grains. The effective moduli grains are calculated using differential (DEM) model, whereby intragranular ellipsoidal inclusions have fixed aspect ratio filled with seawater. Then these spherical modified (scaled to critical porosity) upper Hashin-Shtrikman bound above porosity lower (carbonates) (opal) bounds below porosity. best...

Michelle Ellis, Franklin Ruiz, Sriram Nanduri, Robert Keirstead, Ilgar Azizov, Michael Frenkel1 and Lucy MacGregor discuss how compositional structural features of the subsurface rock strata at different length scales affect elastic electrical properties induce anisotropy. Rock physics models are presented which calculate anisotropy from volumetric fractions solids fluids in rock, microstructural information within rock.

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Tight shale elastic properties using the soft‐porosity and single aspect ratio modelsAuthors: Franklin RuizIlgar AzizovFranklin RuizRSI Ilgar AzizovRSIhttps://doi.org/10.1190/1.3627654 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We estimate of low porosity permeability tight‐shale soft (SPM) (SAR) models. At any specific logged depth...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Fluid substitution in tight shale using the soft‐porosity modelAuthors: Franklin RuizIlgar AzizovFranklin RuizRSI and Ilgar AzizovRSIhttps://doi.org/10.1190/1.3627660 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We propose a methodology conduct fluid low porosity very permeability (tight shale). Gassmann's equations are often used...

The advantages of laminates in terms the chemical properties and mechanical properties/weight relationship have motivated several applications fiber-reinforced plastic (FRP) composites naval constructions due to reduction structural weight. This weight advantage has multiple investigations dedicated dissimilar material joints. We present a methodology for interlaminar stress calculations tubular hybrid joint between an FRP panel steel through reinforcements. proposed formulas allow...

The present work analyzes the use of hybrid joints for construction yachts with purpose reducing structural weight. By means elaboration specimens made tubular steel and fiberglass (GFRP). This is to significantly reduce weight superstructure, allowing yacht be lighter. At same time this reduces fuel consumption, being environmentally friendly. Several test tubes were built different layers covering structure in form a crosshead, give it greater strength. To forces supported by composite...

Summary We propose a new attribute known as Anisotropic Extended Elastic Impedance (AEEI). AEEI, can be calculated in various azimuths, but the most significant azimuths for calculation, are across fractures (AEEI⊥, = 0 Deg. example model) and parallel to (EEI 90 model). The Factor A has seismic anisotropy information, which modifies (EEI), anisotropic reservoirs such fractured plays. reduce EEI. easily inverted used Fracture characterization. demonstrate this with Horizontal Transverse...

We propose an effective‐medium model for estimating the elastic properties of a random aggregate identical, spherical, cemented poroelastic grains. These estimates are achieved using two‐stage approach where porous grains calculated first, followed by homogenized spherical In first stage, effective moduli medium or combination with Gassmann's equation, depending on connectivity intragranular porosity. The pore space may be either air‐ liquid‐filled. second we proceed to calculate dry such...

We offer an effective‐medium model for estimating the elastic properties of high‐porosity marine calcareous sediment. This treats this sediment as a pack porous grains. The effective moduli grains are calculated using differential medium (DEM) where ellipsoidal inclusions have fixed aspect ratio and filled with sea water. Then these spherical modified (scaled to critical porosity) upper Hashin‐Shtrikman bound above porosity (ϕc) lower below porosity. find that best match between...

At low porosity, the elastic moduli of rock mineral matrix often dominates those whole rock. A sedimentary may be considered as a composite and include constituents with very different shapes. To describe fabric these rocks, an unmanageable number parameters needed. Understanding behavior synthetic composites, which are easier to model, enables us quantify effect each parameter on independently. We test whether differential effective‐medium (DEM) self‐consistent (SC) models can accurately...

Summary We have developed an anisotropic elastic rock physics model which models a continuum between sands and shales. The uses both the joint SCA/DEM Hudson to add stiff aligned soft pores in frame. adjusts aspect ratio quantity of control anisotropy rock. initial stiffness is controlled by biconnected porosity point (used model) frame allowing shales be modelled. has been tested against sand shale data from well logs Barents Sea, where accurate fit log was obtained.

The non-uniform wake around the propeller generates fluctuating forces on propulsion shaft. This article presents a methodology used for forced vibrations analysis of hull girder due to this excitation. approach is applied research boat considering working in operating range using finite element model including all ship structures, rudder, and lines with their respective supports. Added mass damping submerged elements were also considered. Vibration levels acting vessel structure are...

Elastic and electrical anisotropy in rocks exists on a large range of length-scales. It is important to understand elastic avoid: misplacing seismic reflectors; incorrect well-ties; inaccurate AVO interpretation; inversion. Similar true for when: interpreting CSEM well-log data; quantifying resistivity anisotropy; using log data ground truth inversion estimating hydrocarbon saturations, build realistic starting models In this study workflow presented combining rock physics modelling,...

Seismic derivable elastic attributes, e.g., impedance, lambda-rho, mu-rho, and Poisson impedance (PI), are routinely being used for reservoir characterization practice. These attributes could be derived from inverted [Formula: see text], density, usually indicate high sensitivity to lithology fluid. Due the of such errors or measurement noise associated with acquisition, processing, inversion prestack seismic data will propagate through products, lead even larger in computed attributes. To...