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河南油田目前共有10个聚合物驱开发单元,其中已有6个开发单元转后续水驱阶段,转后续水驱后,单元递减率都在30%左右,相当一般水驱递减的2倍。因此加强剩余油分布的研究,找准潜力所在,以便制定相应调整挖潜对策,减缓递减率,控制含水上升速度,发挥后续水驱阶段聚合物的增油作用。通过利用物理模拟试验、数值模拟、油藏工程方法等多种方法,对双河油田北块Ⅱ4-5油组的研究,发现聚合物驱后剩余油分布规律,并提出了进一步挖潜剩余油的技术对策。
At present, there are 10 polymer flooding development units in Henan Oilfield, of which 6 development units have been transferred to the subsequent water-flooding stage. After the subsequent water flooding, the unit decreasing rate is about 30% and the average water flooding is reduced by 2 times. Therefore, the study on strengthening the remaining oil distribution should be conducted to find out the potentials so as to formulate the corresponding adjustment and tapping measures, slow down the rate of decline, control the rate of rise of water cut, and give play to the role of polymer in subsequent water flooding. Through the use of physical simulation test, numerical simulation, reservoir engineering methods and other methods, the North Block of Shuanghe Oilfield Ⅱ -4-5 oil group research found the remaining oil distribution after polymer flooding and proposed further tap potential remaining oil Technical measures.