acquiring multi-frequency dielectric data (ε_meas);

applying a dielectric mixing model between different fluid phases to generate an effective fluid permittivity (ε_fluid) by mixing the permittivity of water and hydrocarbon fluids;

applying the dielectric mixing model between the effective fluid permittivity (ε_fluid) and a matrix permittivity (ε_m) to generate an effective permittivity (ε_eff);

minimizing a difference between a measured dielectric response and the effective permittivity by optimizing model parameters, wherein minimizing the difference between the measured dielectric response and the effective permittivity comprises optimizing a water saturation, a textural parameter for water/oil interfaces, and a textural parameter for fluids/matrix interfaces;

computing a cementation exponent (m) and a saturation exponent (n) from the multi-frequency dielectric data (ε_meas);

estimating a textural property of the resorvoir formation based at least in part on the cementation exponent (m) and the saturation exponent (n); and

controlling a wellbore operation based at least in part on the textural property of the reservoir formatiom.