Abstract: By outcrops studies, it is indicated that many laterally stable sand bodies are actually complex channel sand bodies formed by stacking of a number of single-channel sand bodies together. Single-channel sand bodies are much different in grain size, sorting, matrix content and barrier, etc., resulting in uneven oil zone in the complex channel sand bodies. Understanding of the distribution characteristics of these single-channel sand bodies is helpful for establishing more accurate geological reservoir model and finding out more remaining oil. In this paper, on the basis of outcrop, drilling and seismic studies, some identification methods for single-channel sand bodies are proposed, such as outcrop measure method, lithology contrasting method, electrical contrasting method, thickness center method, statistical restraining method, seismic facies and attributes analysis method. These methods are economic and practicable for lithologic reservoir exploration.

Key words: single channel, identification method, lithologic characteristic, electrical characteristic, seismic facies, seismic attributes