Abstract: Based on the interpretation of seismic data and logging, combined with core observation in Tahe area in Tarim basin, the types of volcanic rocks, seismic facies feature and volcanic reservoir-forming conditions are clarified and analyzed. Two types of volcanic rocks such as dacite and basalt of Permian and four seismic facies such as stratified, mound-shaped, lenticular and wedge-shaped ones occur in this area. The stratified seismic facies is in wide distribution, corresponding to the run-off volcanic rock; the lenticular seismic facies is only found in salt-edge sag, mainly controlled by the salt body activity; the mound-shaped seismic facies corresponds to intrusive volcanic rock; the wedge-shaped seismic facies is controlled by the basement fissure, laterally contacted with surrounding rocks, corresponding to near-crater facies; the mound- and wedge-shaped seismic facies are of effective traps and better reservoir conditions, being favorable areas for oil and gas exploration.

Key words: volcanic rock, seismic facies, volcanic facies, reservoir property, exploration potential