At the stage of exploration，the focus should be placed on correct identification of the tectonic structural fault system crossing the basin and the influence on the favorable areas.During the process of evaluation，exploitation and production，as deepening the understanding of reservoirs，the structural fault system in local area should be well understood，the difference is that at this time，what should be cared is the faults and fault system formed by totally different tectonic stress orientation，because they will impact the final recovery.Common fault system interpretation is achieved according to the characteristics of the fault system on seismic profile through artificial observation，identification and 3-D seismic data process.At the present，an advanced optimized algorithm，i.e.，ant tracking technology，can well exhibit the spatial distribution of fault and fracture system.Compared with naked eye by which，only little faults and fractures can be recognized，the automatic interpretation result by ant tracking technology can well reflect fault and fracture system on seismic profile，but also，the result is more clear，visual and precise.The technology based on Petrel Software is applied in fault system analysis for Wumishan Formation of Renqiu buried hill reservoir and good consequence
achieved.It is pointed out that the technology can be used in the prediction
of remaining oil distribution and is worthy of popularization.
