Oilfield produced water stabilization technology based on experimental optimization design
Frequent fouling of filters in an oilfield united station has negatively affected the normal operation of the produced water stabilization process.To solve this problem,based on multi-node water quality analysis and corrosion product analysis,suitable calcium removers were screened,single-factor experiments were carried out on various agents for calcium and iron removal,and the dosing sequence was adjusted.Mixing experiment design under multiple response index values,and field verification were completed based on extreme vertex design.The results show that calcium carbonate and iron oxides induced by iron ions and calcium are the main causes of substandard water quality.Under the dosing sequence of Na2CO3→NaOH→H2O2→PAC→PAM,the combined treatment effect of iron ions and calcium is the best.When the ratio of Na2CO3,NaOH,H2O2,and PAC is 0.485 2,0.213 6,0.203 4,and 0.097 8,respectively,the indexes including free Ca2+concentration,total iron concentration,and light transmittance can reach the optimal level with the composite agreement of the comprehensive index at 0.73.Effluent oil and suspended matter meet the standard requirements.
万方数据
维普
