This paper creates a practical geologic-seismic technology series for rapidly finding the scale of proved oil and gas reserves of lithologic reservoirs in complicated fault basin through summarizing the geologic and seismic technologies used during lithologic reservoirs exploration in Tanan sag, Tamsag Basin. The technology series solve many geological problems and achieve a breakthrough during lithological reservoirs exploration in a short time, and can also be used to direct lithologic reservoirs exploration in similar fault basin.