Repository logo

Browsing by Subject "longitudinal wave"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Badanie wpływu anizotropii i zailenia na prędkości rozchodzenia się fal podłużnych i poprzecznych oraz innych parametrów sprężystych skał klastycznych
    (Wydawnictwa AGH, 2009) Bała, Maria
    Rock anisotropy has a significant effect on longitudinal and shear wave velocities, that are measured in acoustic logging. This can affect both a single layer (then it is related to the microstucture) and a sequence of layers (a large scale). This paper discusses elastic components of anisotropic media with so-called transverse isotropy (TI) and Thomsen coefficients characterizing the P-wave and S-wave anisotropy and $V_{P}/V_{S}$ ratio. The effect of shale rock content on parameters measured in acoustic logging was also studied.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Modele prędkościowe na potrzeby sejsmiki na podstawie profilowań geofizyki otworowej
    (Wydawnictwa AGH, 2011) Jarzyna, Jadwiga; Bała, Maria; Krakowska-Madejska, Paulina I.
    Compressional ($V_{p}$) and shear ($V_{s}$) elastic waves velocities were determined from logging measurements using FWS tool and acoustic full wavetrains processing using FalaFWS application in GeoWin system. Estymacja program was used to calculate both types of wave velocities ($V_{p}$, $V_{s}$) and bulk density theoretical formulas, which combine quantities dependent on mineral composition, porosity, water saturation and type of medium in the rock. The results were compared with respect to P and S waves slowless, bulk density and dynamic elastic moduli: Young modulus, bulk modulus, shear modulus and Poisson ratio. It was determined that in the absence of $V_{p}$ and $V_{s}$ with a lack of acoustic full wavetrains registration, only the Estymacja program provides the expected results. The FalaFWS application broadens the range of results compared to logging results in depth sections where velocity of mud is higher than the velocity of S wave in formation.