关键词: 注水, 地下水, 饮用水层, 监测, 水驱采油

Abstract: Water-flooding is the main exploitation mode of Yangsanmu-Kongdian Oilfield in Huanghua Depression.The produced water must be properly treated and then reinjected into the exploitation layer to replenish formation energy.The drinking water layer of groundwater in the water-flooding area has been monitored from 2014 to 2017 based on the Standard for Groundwater Quality and Standards for Drinking Water Quality.Single component evaluation method and standard index method are adopted to monitor and analyze 41 monitoring factors.The results show that the main factor affecting the groundwater quality in the water-flooding area is the original geological environment.Some individual components have slightly different changing directions in two monitoring years and the changing range is within the scope of the background value of local groundwater.It is not clear that the groundwater is polluted by oilfield produced water injection.So this has little impacts on the aquifers with exploitation and utilization value or water supply significance.

Key words: Water injection, Groundwater, Drinking