牛74块井网适应性评价及方案调整

针对牛74块目前的开发现状，对当前的开发井网合理性进行了评价，采用235m正方形井网，反九点注水方式比较适合。但是该区块目前的合理油水井数比小于实际油水井数比，实际井网密度小于合理井网密度，而实际井距大于合理井距，水驱储量动用程度和水驱储量控制程度都比较差，所以利用数值模拟技术给出两种井网调整方案.结果表明，转注转采和打加密井等措施都很好的提高采出程度，增加产油量。

Well network adaptability evaluation and plan adjustment

In view of niu 74 field’s current developing situation,the current development pattern rationality and think using 235 m square well network are evaluated,inverted nine spot injection way is more reasonable.But now the field’s reasonable oil water ratio is less than actual oil water ratio,the actual well spacing density is less than reasonable well spacing density,but the actual well spacing is greater than reasonable well spacing,water drive reserves producing degree and water drive reserves controlling degree are bad.So numerical simulation technology is used to put forward two plans of well network adjustment.The results show that: oil wells turn to water wells and water wells turn to oil wells and drive infill well can improve degree of reserve recovery and add oil production.