井网加密及注聚时机优化研究

Timing Optimization of Polymer Flooding and Well Pattern Infilling

非均质砂岩油田由于渗透率低,层间渗透性差异大等,致使水驱采收率低。为提高油田采收率,提出井网加密和聚合物驱结合的方法。井网加密及注聚时机对措施效果影响较大,通过Eclipse油藏数值模拟软件对井网加密及注聚时机进行优化研究;在不同措施时机、不同措施间隔时间,对同时加密聚驱、先加密后聚驱、先聚驱后加密等方案进行优化。结果表明,先加密后聚驱,加密时机为含水50%,措施间隔时间为6个月时开采效果最佳。

Water drive recovery in heterogeneous sandstone oilfield is low due to low permeability and difference of interlayer permeability. In order to improve oil recovery, a combination of well pattern infilling and polymer flooding was proposed. The timing of polymer flooding and well pattern infilling has a great influence on the effect of the measures. This paper used the Eclipse reservoir numerical simulation software to optimize the timing of polymer flooding and well pattern infilling. At the same time of different measures and different measures, the optimized schemes of simultaneous encryption, polymer flooding, polymer flooding and polymer flooding were optimized. Results showed that well pattern infilling before polymer flooding, when well pattern infilling time was 50% water cut, measures time interval was six months, the mining effect was the best.