...-resonance frequencies. The comparison shows that material anisotropy impacts both the resonance and anti-resonance frequencies. Abstract In this work, the theory of anisotropic dual-porosity dual-permeability poroelastodynamics is used to simulate the responses of pore pressure, displacement...

...). They are mainly sensitive to horizontal resistivity (Rh) in vertical wells. They are also affected by anisotropy in high angle and horizontal wells. Deep resistivity New deep resistivity measurements from tilted receivers are constructed from axial transmitters and tilted receivers (R3 and R4...

... several parameters like, attenuation coefficient (Q), multiples prediction, impedance, reflectivity etc., which helps with characterizing the subsurface and seismic reprocessing. In the appraisal phase, BHS applications vary from velocity model update, anisotropy estimation, well- tie to imaging VSPs...

... have a relatively higher value. The discrepancy in mineralogical composition, especially the clay content, results in different elastic and mechanical behavior of outcrop and subsurface samples. The subsurface sample is highly anisotropic in both compressional and shear wave anisotropy due...

... permeability measurements in both laboratory and field applications. It is designed to obtain fast, cheap, intensive and non-destructive permeability measurements and to describe the spatial arrangement of permeability. In this work, the effect of vertical and horizontal anisotropy on the probe permeameter...

... Abstract This paper presents a case study in which new methods that use full-waveform sonic data are applied in an unconventional well setting to determine depth-dependent elastic anisotropy of formations penetrated by the well and estimate parameters of interest. The study objectives include...

... limestone formations, respectively, with very high horizontal stress magnitude and anisotropy noticed in low clay and low TOC layers. Different stimulation scenarios were investigated by using hydraulic fracturing simulation software. The results suggest that the high horizontal stress contrast between...

... and fracturing fluid and proppant properties. Much work has previously been done to address well productivity and optimal well spacing. This paper presents some quick and simple analytical solutions associating well geometry to productivity improvement. The impact of reservoir permeability, vertical anisotropy...

... undepleted. Reservoir Characterization Upstream Oil & Gas Wellbore Design overburden stress wellbore integrity rock strength strength horizontal stress anisotropy stress magnitude mud weight reservoir geomechanics wellbore stability pore pressure situ stress anisotropy stability...

... Based on the field data and their calibration, a geomechanical model was developed. The availability of image logs for Well#C made it possible to assess the degree of stress anisotropy in the horizontal direction. It was found that the difference between the maximum and the minimum principal...

.... Many improvements have been made since, and tools with multi-receiver arrays have dramatically increased the range of borehole sonic applications (Harrison et al, 1990, [ 5 ]). Borehole sonic shear wave anisotropy It has been recognized that sedimentary rocks can exhibit anisotropy. Shear wave...

... of uncertainty in the results. These new estimates can now be confirmed, and the uncertainty removed, by the combined use of vertical and horizontal resistivity measurements. The measurements, made using a multi-component induction logging tool, measure the electrical anisotropy of the formation, and as such can...

... characteristics of S-wave azimuthal anisotropy induced by vertical fracturing. In the presence of fractured media, S-waves split into a fast wave that is polarized parallel to fractures and a slow wave that is polarized normal to fractures.The amount of splitting (time difference between the two S-waves...

... Whilst many fractured reservoirs have been profitably produced, few of them have been depleted in an efficient manner. Nelson 1 points out the importance of classifying fractured reservoirs based on the amount of heterogeneity and anisotropy observed in the porosity and permeability...

.... The realistic characterization of such types of reservoirs is not an easy task and must include the study of directional variation of permeability. The latter is incorporated in engineering calculations as the square root of the ratio of horizontal to vertical permeability, a parameter known as the anisotropy...

... are interpreted using a homogeneous model, the resulting permeability anisotropy estimates may be in significant error. Moreover, very different physical situations often lead to very similar P v /P h transfer functions, and thus the risk is high that a diagnosis is incorrect when it is made solely from...