Abstract: In the course of natural gas development, a great amount of sour gas reservoirs has been found. The sulfide precipitation brings about many problems to be solved for production of such wells or reservoirs. This paper reviews the mechanisms, ffected factors and mathematic prediction models of sulfur precipitation, according to lots of information. A number of understandings for the afct of sulfide precipitation on gas welreervoir production are given. Some isues to be urgently solved for it are pointed out particu larly.

Key words: gas well, gas reservoir, sour gas, sulfide content, solubility