Reflection seismic exploration, based on layered medium theory and regular acquisition systems, effectively solves large-scale geological body imaging through multiple coverage observations and Common Midpoint (CMP) stacking. However, it has limitations in precise imaging of small-scale, non-layered, and concealed geological targets. Full-wavefield seismic technology, which jointly images reflection waves, diffractions, and scattered waves, can compensate for the insufficient spatial resolution of reflection seismic data. Irregular seismic acquisition is a full-wavefield seismic acquisition method that enables discrete common midpoint sampling. It ensures sufficient sampling of scattered and diffracted waves while allowing for fine bin processing. To enhance the effectiveness of irregular discrete sampling, this study proposes an evaluation method, analyzes the impact of randomization patterns and parameters, and compares irregular vs. conventional acquisition with real data. Results show that the method quantitatively assesses CMP discreteness, guiding irregular acquisition layout. Irregular data facilitates finer bin processing and clearer fracture delineation, proving effective for late-stage oil/gas exploration and development.