Research and Application of Defoaming Absorption Method for Treating Acidizing Backflow Fluid
Treatment process became mroe difficult on acidizing flowback because of hydrogen chloride and foam exist-ing.Defoaming,packed tower absorption,spraying,neutralization and other technology has been carried out for process-ing acidizing flowback.Process parameters such as designing of absorption tower,spray time,spray volume defoaming agent reaction time was optimized.The results showed that the better treatment effect was obtained when the GX-2 defoaming agent dosage was 125 mg/L,the defoaming reaction time was 1.4 min,the lye spray time was 1.2 min,and the spray volume was 7.5 m3/h.The results of field test showed that when hydrogen chloride content is 300～720 mg/m3,the dosage of antifoaming agent could be adjusted to 100～125 mg/L and the spray volume to 6.5～9.5 m3/h.The con-tent of hydrogen chloride in the acidified flowback solution was reduced to below 5.7 mg/m3.More than 14 000 m3 acid liquid was treatmented in the field,and the recovery rate of flowback is 95％,which has a good protection effect,demonstated the technology with good environment.
NETL
NSTL
万方数据
