Determination of Reservoir Hydraulic Flow Units and Permeability Estimation Using Flow Zone Indicator Method

Reservoir characterization plays a crucial role in comprehending the distribution of formation properties and fluids within heterogeneous reservoirs. This knowledge is instrumental constructing an accurate three-dimensional model reservoir, facilitating predictions regarding porosity, permeability, fluid flow distribution. Among various methods employed for reservoir characterization, hydraulic unit stands out as widely adopted approach. By effectively subdividing into distinct zones, each characterized by unique petrophysical geological properties, units enable comprehensive analysis. The concept closely tied to zone indicator, critical parameter that defines porosity-permeability relationships unit. Additionally, indicator method proves valuable estimating permeability accurately. In this study, we demonstrate application determine Khasib formation. analyzing core data calculating Rock Quality Index (RQI) Flow Zone Indicator (∅Z), differentiate four based on FZI values. Specifically, HFU 1 represents rock poor quality, corresponding compact chalky limestone. 2 intermediate argillaceous limestone, while 3 good porous Lastly, 4 signifies excellent quality vuggy establishing equation correlates with effective porosity type, successfully estimate permeability. Comparing these estimated values reveals strong agreement high correlation coefficient 0.96%. Consequently, classifies provides reliable means determining reservoir. resulting equations can be applied wells depth intervals lacking measurements, further emphasizing practical utility method.