Abstract: The present petroleum exploration has trended from structural reservoirs to lithologic and stratigraphic reservoirs. One of the latter exploration focuses on exactly identifying mini-faults and nip-out line in stratigraphic reservoirs. Conventional coherent wave analysis can hardly be used for identifying the mini-faults with fault throw less than half of event. This paper studies such mini-fault identification, and develops a wave analysis-based identifying approach with up to date technologies, by which the stratigraphic nip-out line and the mini-faults can be precisely identified, thus, the interpretation accuracy and velocity as well as analytical cycle could be all improved.

Key words: wave analysis, ni-out line, lithologic reservoir, fault