摘要
针对胜利油田油井采出水处理负荷过大但锅炉用水短缺的问题,对油井采出水进行生化双膜工艺处理,处理后的产水用于锅炉给水,浓水用于低渗油田回注。开展了规模为200 m^(3)·d^(−1)的中试实验,重点研究了超滤进水悬浮物与超滤膜污染的关系,考察了反渗透进水压力、进水温度对产水率、膜通量和透盐率的影响。结果表明:生化处理后的油田采出水中的悬浮物含量与膜污染速度无关,跨膜压差ΔP的增加速度为0.0000462 MPa·d^(−1);增大反渗透进水压力会导致产水率增加、膜通量增加、透盐率降低;升高进水温度会导致产水率增加、膜通量增加、透盐率升高;生化处理后的采出水含油量为0.63 mg∙L^(−1),超滤后悬浮物为0.2 mg∙L^(−1),反渗透后产水电导率为81~245μS∙cm^(−1),可满足锅炉给水SY/T 0097-2016设计规范中对含油量、悬浮物和矿化度等指标的进水要求。
Aiming at the problem of excessive load of oil well produced water treatment in Shengli Oilfield and shortage of boiler water,the oil well produced water was treated by a biochemical double membrane process.The treated water was used for boiler feeding water and the concentrated water was used for low permeability oilfield reinjection.A pilot experiment with a scale of 200 m^(3)·d^(−1)was conducted to mainly study the relationship between the suspended solids in ultrafiltration influent and ultrafiltration membrane fouling,and the effects of the pressure and temperature reverse osmosis inlet on water production rate,membrane flux and salt penetration rate.The results show that the content of suspended solids in the treated oilfield produced water by biochemical treatment was irrelevance to the rate of membrane fouling,and the increase rate of transmembrane pressureΔP was 0.0000462 MPa·d^(−1).The increase of the pressure of reverse osmosis inlet resulted in the increase of water production and membrane flux and the decrease of the salt permeability.The increase of the inlet water temperature elevated the water production rate,the membrane flux and the salt permeability;the oil content of the produced water after biochemical treatment was 0.63 mg∙L^(−1).The suspended solids after ultrafiltration was 0.2 mg∙L^(−1),and the conductivity of the water produced after reverse osmosis was 81~245μS∙cm^(−1),which can meet the requirements for oil content,suspended solids and salinity in the boiler feeding water design specification of SY/T 0097-2016.
作者
潘永强
于丹丹
杜春安
刘雨文
孙静
苗长波
PAN Yongqiang;YU Dandan;DU Chunan;LIU Yuwen;SUN Jing;MIAO Changbo(Petroleum Engineering Technology Research Institute of Sinopec Shengli Oilfield,Dongying 257000,China;China University of Petroleum-Beijing At Karamay,Karamay 834000,China;Binnan Oil Production Plant of Sinopec Shengli Oilfield,Binzhou 256600,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第2期530-536,共7页
Chinese Journal of Environmental Engineering
基金
中石化科技攻关项目(320080)。
关键词
采出水
生化
双膜
跨膜压差
浓差极化
produced water
biochemical
double membrane
transmembrane pressure difference
concentration polarization
