This paper investigated fluid properties of the reservoir,composition of the reservoir rock,and microbial growth in a Bohai oilfield,where the concentration of hydrogen sulfide continued to rise. The results indicate that biogenic origin is the main reason of hydrogen sulfide.In order to solve the problem that hydrogen sulfide content exceeds standard value,evaluation experiments of different types of desulfurizers were carried out to investigate the effects of mass concentration of desulfurizer,pH,water content and desulfurization time on desulfurization effect. The results show that 1, 3, 5?triazine derivative desulfurizer TL?13 shows the highest efficiency of desulfurizing.The concentration of hydrogen sulfide in turbine fuel gas decrease from 150 to 8 μg/g after desulfurization by desulfurizer TL?13,and reaches the standard of turbine fuel gas.This paper provided technical support and practical experience for treatment of hydrogen sulfide in offshore oilfield.