Xingnan development zone of Daqing Oilfield has entered extremely high water
cut stage, with serious reservoir heterogeneity and poor effect of water control and potential tapping measures. A set of ideas for fine potential
tapping and adjustment of water flooding was formed by going over the injection and production profile data of 544 wells in Xing X demonstration
area and analyzing the oil and water well measures of 424 wells. The results show that the monitoring data can evaluate the effect of measures
such as converting production well to injection well, remedial perforation of oil and water well, water well subdivision, profile control,
acidification, adjustment of testing, and oil and water well fracturing can be evaluated so as to evaluate the production status of oil and water
wells. The low water content and potential layers with low water content can be found based on the corresponding testing data of injection and
production profiles, thus adjustment of injectionproduction system and injectionproduction structure can guide water drive control decline and
water cut control measures in ultrahigh water cut stage. The adaptability analysis of monitoring data to various stages of development
adjustment measures in the test area can provide strong basis and successful experience for fine tapping potential and efficient development of
water flooding in ultrahigh water cut period.