渤海油田注水用液体脱硫剂的筛选和现场应用

Research and Application of Liquid Desulfurizer for Water Injection in Bohai Oilfield

胡 廷

HU Ting

针对渤海某油田注水系统硫化氢浓度过高的现状，通过测定脱硫剂对注入水的脱硫效率和阻垢剂对注入水中钙离子浓度的影响，优选出改性三嗪类液体脱硫剂和聚磷酸盐防垢剂，并在注水水源井所在C平台进行了现场中试。结果表明，改性三嗪类液体脱硫剂对注入水的脱硫效率为98.1%，脱硫效果最好，但会使水中钙离子浓度降低，出现结垢。与聚磷酸盐防垢剂一起使用可明显减少钙离子的沉积。在平台现场药剂中试时，脱硫剂和防垢剂加量分别为500 mg/L和20 mg/L，水源井系统的硫化氢浓度由800 mg/m3降至约20 mg/m3，产液中的硫化氢量从150 mg/m3降至约4 mg/m3，满足平台脱硫的需求，同时避免了沉积垢。图2表2参12

In view of the high concentration of hydrogen sulfide in water injection system of an oilfield in Bohai Sea，the modified triazine liquid desulfurizer and polyphosphate scale inhibitor were selected by measuring the desulfurization efficiency of desulfurizer on injected water and the effect of scale inhibitor on calcium ion concentration in injected water. Furthermore，the field pilot test was carried out on platform C where was the location of water injection well. The results showed that the desulfurization efficiency of modified triazine liquid desulfurizer for injected water was 98.1%，and the desulfurization effect was the best，but the concentration of calcium ion in water would reduce and scaling would occur. While used with polyphosphate scale inhibitor，the deposition of calcium ion could be significantly reduced. During the pilot test of the platform，the dosage of desulfurizer and scale inhibitor was 500 mg/L and 20 mg/L respectively. The concentration of hydrogen sulfide in the water source well system reduced from 800 mg/m3 to about 20 mg/m3，and the amount of hydrogen sulfide in the production fluid reduced from 150 mg/m3 to about 4mg/m3，which met the desulfurization requirement of the platform and avoided depositing scale.

10.19346/j.cnki.1000-4092.2019.02.017