模拟油田采出水中硫化氢的脱除研究

硫化氢是油气田伴生气中的有害组分。在含硫油气田的采出水中,硫化氢的存在对于安全生产和和油田环境均会产生危害。采出水经处理后通常需作为地层回注水使用,由于油气生产的特殊性,常用的硫化氢脱除方法在使用中受到限制,探索适合于油气田生产的水处理方法十分必要。本文探讨了通常可用于油田水中硫化氢脱除的各种方法,对比了各类方法的优缺点,提出以次氯酸钠为主要脱硫剂的水处理方法,通过对模拟采出水的室内试验,证明次氯酸法可以快速有效地去除采出水中的硫化氢,并提出了消除过量氧化剂的后续处理方法。实验表明经处理后的水质可以达到油气田回注水质要求,处理成本较低。

Study on removal of hydrogen sulfide from oil field produced water

Hydrogen sulfide is a harmful component in associated gas of oil and gas fields. The existence of hydrogen sulfide in the produced water of sulfur-bearing oil and gas fields will do harm to the safety of production and the environment of oil fields. After treatment, produced water is usually used as formation reinjection water. Because of the particularity of oil and gas production, the commonly used methods of hydrogen sulfide removal are limited in use. It is necessary to explore water treatment methods suitable for oil and gas field production. In this paper, various methods commonly used to remove hydrogen sulfide from oilfield water are discussed, and the advantages and disadvantages of these methods are compared. A water treatment method using sodium hypochlorite as the main desulfurizer is proposed. Laboratory tests on simulated produced water show that hypochlorite method can remove hydrogen sulfide rapidly and effectively, and a proposal is put forward. Subsequent treatment methods for eliminating excessive oxidants. Experiments show that the treated water quality can meet the water quality requirements of oil and gas field reinjection, and the treatment cost is low.