新型复合脱硫杀菌剂的制备及其对油井中含硫化氢气体的处理效果

A new type of composite desulfurization bactericide is developed in this study based on the evaluation of static desulfurization and bactericidal performance, and the screening, optimization and compounding of the main desulfurization and bactericidal agent,. The apparent sulfur capacity and bactericidal efficiency of the agent are as high as 800 mg·L⁻¹ and 99%, respectively. It is not corrosive to metals so has good compatibility with crude oil and various additives in oil fields. Results from application to engineering fields showed that the concentration of hydrogen sulfide in oil wells was reduced from 8000 mg·m⁻³ to 0 mg·m⁻³, and the number of sulfate-reducing bacteria was reduced from 100 000 mL⁻¹ to less than 10 mL⁻¹, which could be maintained for 1~7 days. Consequently, the agent has an excellent effect on the treatment of toxic and hazardous substances in the oil and gas development process. The results of this study are expected to provide references for efficient and low-cost prevention and control of hydrogen sulfide in oil and gas fields.