FORMATION OF H2S DURING THERMAL RECOVERY FOR VISCOUS OIL BY STEAM 
ZHANG Jing-yan ;ZHU Guang-you ; TIAN Jian-bo ;WEN Zhi-gang ;ZHANG Shui-chang
Natural Gas Geoscience . 2007, (6): 798 -802 .  DOI: 10.11764/j.issn.1672-1926.2007.06.798