Study Of Water Flooding For Oilfield Development In High Water Cut Stage Of SZ Development Zone

When the oil field development has entered the development of ultra-high water cut stage, compared to the low water content, The ultra-high water cut reservoir has some characteristics, such as, low production rate, large water consumption, more decentralized remaining oil, bad impact of the measures taken, deterioration in well condition, declined economic benefits. So, limits on the development of technologies need to be re-adjusted.The SZ zone has been developed for 47 years, and now it has entered the period of high water cut stage and decreasing production. The oil field development is faced with the "three-high" situation of high water cut, high degree of recovery, high-decreasing. At present, the oilfield comprehensive aquifer has reached 91 percent. According to the conditions of water flooding exploitation, the effects of measures to increase oil have been deteriorated year by year. The cut differences between the various layer systems have been only 3 ~ 4 percentage points. The room of structural adjustment has been very little. The difficulty for the comprehensive adjustment has increased. Therefore, the core displacement experiments and the field data analysis are needed to study the water-drive laws of the high water cut stage reservoirs in SZ zone.