Abstract: The gas reservoir with high content of H₂S is a special type of reservoir. Because the material balance equation for conventional gas reservoir takes no account of the sulfur deposition, it is hard to completely describe the production performance of gas reservoir with high content of H₂S. Considering the sulfur deposition, in view of different gas types such as constant-volume gas reservoir, closed gas reservoir and water drive gas reservoir, the material balance equation with high content of H₂S is deduced and presented in this paper.

Key words: gas reservoir, material balance equation, sulfur, deposition