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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. Geometric relaxation time of induced polarization was calculated from the distribution of pores and the fractal dimension was proven from the relationship between water saturation and geometric relaxation time of induced polarization. In addition to field observation and obtained results of fractal dimension, 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 Shajara Geometric Relaxation Time Fractal dimension Unit, Middle Shajara Geometric Relaxation Time Fractal Dimension Unit, and Upper Shajara Geometric Relaxation Time Fractal Dimension Unit. These units were also proved by arithmetic relaxation time of induced polarization fractal dimension. It was found that the geometric relaxation time fractal dimension is similar to the arithmetic relaxation time fractal dimension of induced polarization. It was also reported that the obtained fractal dimension speeds with increasing permeability and relaxation time due to an increase in pore connectivity.

international journal of petrochemistry and research

Geometric relaxation time of induced polarization fractal dimension for characterizing Shajara Reservoirs of the Shajara formation of the PermoCarboniferous Unayzah Group-Permo