Study On Advanced Treatment Of Produced Water In Daqing Oilfield With Low Permeability

The Longhupao oilfield of Daqing peripheral was developed more earlier as the"three lows"oilfield that was "low-abundance, low permeability, low capacity", and in the initial stage of development, water supply and water treatment systems used in processing technology to meet the basal needs of flood development, with the increasing of oily wastewater in 2000 started to build a further oily wastewater treatment station, in accordance with the introduction of oilfield development needs of low-permeability layer water quality standard.In order to meet the needs for development of oilfields and to further improve the water quality that injected into the reservoir, the paper on the basis of water treatment technology in the Longhupao oilfield, in view of Longhupao oilfield in the high-water development of late stage, the problem of oilfield wastewater excess the quality standards was very serious, proceeded further wastewater treatment technology research in this field, through laboratory: selected the pharmaceutical for Longhupao oilfield wastewater treatment, proceeded pharmaceutical and wastewater compatibility test, the results showed that: a screening of pharmaceutical and Longhupao oilfield wastewater are completely compatible, it can be developed to meet the development needs of oilfield injection. On the basis of above proceed core water flooding experiment in the Longhupao oilfield, it may be draw up water flooding plan according to the different levels of suspended, the last results show that: suspended solids content standard of wastewater reinjection should be 2.2 mg/L in the Longhupao oilfield. In the above study on the basis of Longhupao oilfield, we can establish all kinds of material content standards of wastewater in the late oilfield.