Abstract: The volcanic reservoirs as a new field of petroleum exploration have long been little known because their complexity and specific characteristics. The purpose of this paper is to provide new insights into the reservoir spaces and influencing factors of the volcanic reservoirs. The reservoir spaces of the volcanic reservoirs encompass pore spaces and fissures, and the fissures, in turn, may connect various isolated pore spaces. As a result, the mosaics of pore spaces and fissures or cracks may cause effective reservoir spaces of volcanic reservoirs. The influencing factors of the volcanic reservoirs including lithology, lithofacies, diagenesis, weathering, leaching and tectonism may play an important role in the modification of the reservoir spaces of the volcanic reservoirs in the study area.