The influence of urea on Aerosol-OT (AOT)/n-hexane/water reversed micelles (RMs) at molar concentration ratio [water]/[AOT]=10 is investigated by means of small angle x-ray scattering. The data are analyzed within the framework of repulsion and attractive interaction potentials through the sticky hard-sphere model. In the absence of urea the simple hard sphere (excluded volume) model applies up to RM volume fraction phi of 0.32. In the presence of 5M urea, the x-ray curves evidence a big influence of the attractive forces in the system for phi=0.06, in good agreement with previous light scattering results, without disturbing the RM structure (shape and size). When phi exceeds this value, a percolation phenomenon is observed by ionic conductance measurements. In addition, the data show an interplay between attractive and repulsive RM interactions at higher phi values, with preservation of the discrete RM structure, without the formation of a "long-lived" bicontinuous phase.