造纸废水处理为油田注入水的研究

A METHOD FOR CLEANING AND CONVERTING BLACK LIQUOR FROM ALKALI STRAW PULP/PAPER MAKING INTO QUALIFIED INJECTION WATER

首次提出了将造纸废水处理为油田注入水的设想，研究设计了一种投资小成本低的处理工艺，按该工艺处理后的造纸废水可用作中低渗透油田的注入水。

lack liquor from alkali straw pulp/paper making is treated by coagulant FA1 and filtration aid FZ at ≥50℃ and filtrated to give clear water with MF>15 and SS<3 ppm. This treated water is mixed with white liquor, a less contaminated waste water of pulp/paper making in volume ratio 1∶1 and then pipetransported to watertreating plant where the whole waste water is mixed with oilfield produced water in volume ratio 1∶3 and together treated by a novel technology with limewater (to control pH to >9.0), a coagulant and a water quality stabilizer to give qualified injection water meeting all requiments for flooding low and medium permeability reservoirs.