Prediction of the Shear Wave Velocity from Compressional Wave Velocity for Gachsaran Formation

• Autorzy: Parvizi S. , Kharrat R. , Asef M. R. , Jahangiry B. , Hashemi A.

Identyfikatory

DOI

10.1515/acgeo-2015-0048

• Języki publikacji: EN

Abstrakty

EN

Shear and compressional wave velocities, coupled with other petrophysical data, are very important for hydrocarbon reservoir characterization. In situ shear wave velocity (Vs) is measured by some sonic logging tools. Shear velocity coupled with compressional velocity is vitally important in determining geomechanical parameters, identifying the lithology, mud weight design, hydraulic fracturing, geophysical studies such as VSP, etc. In this paper, a correlation between compressional and shear wave velocity is obtained for Gachsaran formation in Maroon oil field. Real data were used to examine the accuracy of the prediction equation. Moreover, the genetic algorithm was used to obtain the optimal value for constants of the suggested equation. Furthermore, artificial neural network was used to inspect the reliability of this method. These investigations verify the notion that the suggested equation could be considered as an efficient, fast, and cost-effective method for predicting Vs from Vp.

Słowa kluczowe

EN

compressional wave velocity; shear wave velocity; sonic log; DSI log; MATLAB software

PL

prędkość fali; geofizyka otworowa; oprogramowanie MATLAB

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2015
• Tom: Vol. 63, no. 5
• Strony: 1231--1243
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Parvizi S.

• Petroleum University of Technology, Department of Petroleum Engineering, Ahwaz, Iran

autor

Kharrat R.

• Petroleum University of Technology, Department of Petroleum Engineering, Ahwaz, Iran

autor

Asef M. R.

• Kharazmi University, Faculty of Earth Sciences, Department of Applied Geology, Tehran, Iran

autor

Jahangiry B.

• National Iranian South Oil Company, Department of Drilling Engineering, Ahwaz, Iran

autor

Hashemi A.

• Petroleum University of Technology, Department of Petroleum Engineering, Ahwaz, Iran

Bibliografia

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• [2] Brocher, T.M. (2005), Empirical relations between elastic wavespeeds and density in the Earth’s crust, Bull. Seismol. Soc. Am. 95, 6, 2081-2092, DOI: 10.1785/0120050077.
• [3] Castagna, J.P., M.L. Batzle, and R.L. Eastwood (1985), Relationships between compressional- wave and shear-wave velocities in clastic silicate rocks, Geophysics 50, 4, 571-581, DOI: 10.1190/1.1441933.
• [4] Farrokhrouz, M., and M.R. Asef (2010), Dominant parameters for estimation of shear wave velocity. In: 19th Int. Geophysical Congress and Exhibition, 23-26 November 2010, Turkey, Ankara.
• [5] Han, D.H. (1986), Effects of porosity and clay content on acoustic properties of sandstones and unconsolidated sediments, Ph.D. Thesis, Stanford University, Department of Geophysics, Stanford, USA.
• [6] Liu, Y., Z. Chen, and K. Hu (2012), Shear velocity prediction and its rock mechanic implications. In: Conf. GeoConvention 2012: Vision, 14-18 May 2012, Calgary, Canada, 5 pp.
• [7] Memari, A. (2013), Evaluation of surface subsidence in one of Iran’s oil fields using INSAR technique, Am. J. Oil Chem. Technol. 1, 4, 9-17.
• [8] Rawlings, J.O., S.G. Pantula, and D.A. Dickey (1998), Applied Regression Analysis: A Research Tool, 2nd ed., Springer Texts in Statistics, Springer, New York.