Permian volcanic rocks are widely distributed in northern part of Tarim Basin

and well test results of the volcanic reservoirs in well HT1 confirm their oil bearing in this area.The author mainly discussed the electrical characteristics of the volcanic rocks

horizontal and vertical distribution of the lithology-facies and pore types of the volcanic rocks.The study showed the thick and massive dacite and basalt of effusive facies were dominated in Aiding-Tuoputai-Hadexun area

which are relatively homogeneous in lithogy and stable in lateral distribution.Well data indicate that the Permian volcanic rocks in Tahe oilfield are of well-developed secondary pores and fractures.Core test results show that the volcanic reservoirs have low porosity and low permeability.The reservoir properties mainly depend on the combination of fractures

vugs and pores.Combined with hydrocarbon accumulation model of volcanic reservoirs in this area

it is believed that anticlines and stratigraphic traps exist in the volcanic rocks.The volcanic rocks and directly overlapping thick mudstone of Triassic Ketuer Formation form better reservoir-seal system.The volcanic rocks have favorable conditions for hydrocarbon accumulation and good potential for petroleum exploration.Based on re-evaluation of the drilled wells

the re-testing work of two wells is presented in order to promote exploration development of Permian volcanic rocks in Northern Tarim Basin.