ISSN: 2578-4846
Authors: Alameedy U*, Wattan AR, Assi AH and Al-Jawad M
Using acoustic wave propagation to analyze rocks in mining and geotechnical engineering, researchers have been looking into the link between dynamic and static elastic properties since the early twentieth century. The essential mechanical qualities of rock materials that are necessary for the analysis and design of rock digging operations are determined by their elastic properties (Young's modulus, shear modulus, and Poisson's ratio). Geomechanical applications rely on acoustic data to create a safe mud weight window, estimate rock strength parameters, sand management, and hydraulic fracturing. Ultrasonic lab and sonic log readings are often inconsistent because of the frequency differential and other considerations. Ultrasonic laboratory measurements and acoustic logs of shear wave velocity and compressional wave velocity for the Mishrif formation in the West Qurna-1 oil field are compared in this work to better understand how these critical measurements influence on the accuracy of calculating dynamic model. compressional (Vp) and shear (VS) wave velocities and density data were used to compute the porosity as well as elastic modulus. We observed a correlation between P wave velocity and sample elastic characteristics. Vp and elastic characteristics were correlated using regression analysis to generate empirical equations. Correlations between velocity data and the geological background of the region yielded excellent estimates of elastic characteristics. The results showed that there is a good agreement between Young's coefficient from the laboratory and the obtained log data, where the R2 value is 0.86. A good match between Vp and VS was also obtained for the laboratory data where the R2 value was 0.83.
Keywords: Shear Wave; Velocity; Ultrasonic; Acoustic Log; Formations
