igh yield were located in Tarim basin. The development of“the three high”gas fields was still in early development stage in China,the risks would be higher with larger capacity,with plex process,and with larger capacity. The high concentration of HS/COwould erode the surface facilities,do harm to personnel,and do influence the environment. In fortuitous event,the high pressurewould relieve physical and chemical energy,and high load would affect larger area. In view of these risks,the key safety technologies including process,the quality of the equipments and pipelines,safety relief,and safe distances with surroundings were introduced. The research positive results with broad application prospects would bring long-term economic and social benefits PC. 1 12 8 16 192428ABSTRACTS OF ARTICLES34