WebJun 1, 2024 · Among these methods, the ultrasonic technique is the most convenient to be used in rock mechanics. In this technique, transition time of a traveling elastic pulse wave is measured between two points in a core plug, and thus the compressional and shear waves (P- and S-wave) velocities can be calculated. WebDec 17, 2024 · Compressional and Shear Velocities. Seismic compressional velocity and shear velocity are calculated from the expressions [Schcjn, 1996; McQuillin, et al., 1984]: …
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WebNov 14, 2016 · Compressional V p and shear V s velocities measurements were taken out on fluid-saturated shale and limestone obtained from the Ewekoro quarry of Southern Nigeria sedimentary basin at constant differential pressure of 50 MPa with porosities ranging from 0.32 to 0.53% and 0.01 to 0.35 for limestone and shale, respectively, while the … WebThere are three types of stress: tensional, compressional, and shear. 9.2: Deformation When rocks are stressed, the resulting strain can be elastic, ductile, or brittle. This change is generally called deformation. Elastic deformation is a strain that is reversible after the stress is released. For example, when you stretch a rubber band, it ... phillip liefman
Compressional Wave - an overview ScienceDirect Topics
WebFully characterized acoustics measurements across all formations and hole sizes from 5 7/8 in to 26 in. Logging while drilling or while tripping and at up to 1,800 ft/h without slowing down drilling operations. Real-time and … WebThe NLOG database was used to select 41 wells containing compressional and shear sonic logs, distributed over the onshore Netherlands (Fig. 1 & Appendix A). The main selection criteria was the availability of compressional (DTCO, DTC, DT4C or DT) and shear (DTSM, DTS or DT4S) sonic logs for intervals that contain WebThis report summarizes and documents empirical compressional wave velocity ... (1995). Vs is then used to calculate intrinsic attenuation coefficients for shear and compressional waves, Qs and Qp, … tryptophan and depression