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Arithmetic relaxation time of induced polarization fractal dimension for characterizing Shajara Reservoirs of the Shajara Formation, Saudi Arabia

Khalid Elyas Alkhidir


Sandstone samples were collected from the surface type section of the Shajara Formation of the Permo-Carboniferous Unayzah Group for detailed reservoir characterization. Capillary pressure experiment was performed to contact porosity and permeability was derived from the Data. Arithmetic relaxation time of induced polarization was calculated from the distribution of Permeability and the fractal dimension was calculated from the relationship between wetting phase saturation and Arithmetic relaxation time of induced polarization. In addition to field observation and obtained results of fractal dimension values, the Shajara reservoirs of the Shajara Formation of the permo-Carboniferous Unayzah Group were divided here into three fractal dimension units. The Units from base to top are: Lower, Middle, and Upper Shajara Arithmetic Relaxation Time Fractal dimension Units. It was also reported that the obtained fractal dimension speeds with increasing permeability and relaxation time due to an increase in pore connectivity.


Shajara Formation; Shajara Reservoirs; Permeability; fractal dimension

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Schoeppel, R.J. and Thrasher, J.E. 1966. Laboratory study of induced polarizationin sandstone rocks with varying salinity and shalyness, SPWLA 7th Annual Logging Symposium, 9-11 May, Tulsa, Oklahoma1966.

Maosong T, Weinan W, Li L. et al. 2004. Estimation of permeability of shaly sand reservoir from induced polarization relaxation time spectra. J. Petrol. Sci. Eng 45 (1-2): 1-10.

Liu,X. Kong,Li. Zhang,P. et al.2014. Permeability estimation using relaxation time spectra derived from differential evolution inversion. J. Geophys. Eng. 11: 1-8.

Al-Khidir K.E., Al-Laboun A, Al-Qurishi A., and M. S. Benzagouta. 2011. Bi¬modal pore size behavior of the Shajara Formation Reservoirs of the Permo-Carboniferous Unayzah Group, Saudi Arabia. J Petrol Explor Prod Technol 1(1): 1-9.

Al-Khidir K.E, Benzagouta M, Al-Qurishi A., and A. A. Al-Laboun. 2013. Charac¬terization of heterogeneity of the Shajara Reservoirs of the Shajara Formation of the Permo-Carboniferous Unayzah Group. Arab J Geosci.Arabian 6 (10): 3989-3995.

Al-Khidir 2017. Nuclear magnetic resonance as diagnostic parameter for reservoir characterization. Archives of petroleum and Environment biotechnology

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