平面非均质边水驱油藏来水方向诊断和调整

Diagnosis and adjustment of edge water direction in plane heterogeneous reservoir

冀东油田 12 # 油层是高 10 4 5区块的主力小层 ,属于河流相沉积 ,平面非均质性强 ,边水能量活跃 ,是该小层的驱动动力。对该层位渗透率等值图进行了分析 ,抽象出一个实验物理模型。该模型在形状和渗透率分布上基本与地质模型相似 ,并以充分接触的水线模拟边水 ,符合地质原型边水驱油实际情况。在两种井网模式下模拟了边水侵入后前缘突进规律。结果表明 ,渗透率是控制边水侵入的主要因素 ,边水侵入后沿主河道推进速度最快。井网部署方式与储层非均质性有一定的适应性 ,合理的井位能抑制边水突进。示踪剂监测解释结果表明 ,在主河道西部 ,边水自西北向东侵入 ;主河道东部边水自东北向西南入侵 ,与主河道砂体展布方向一致。实验模拟结果与示踪剂监测结果吻合。根据研究结果在现场实施边水调剖措施 。

No. 12 layer is a major production bed of 104-5 region in Jidong Oilfield. It belongs to fluvial deposit. Its plane heterogeneity is serious, and edge water drive is the active force for this layer. An experimental model was developed, on the analysis of the permeability chorogram of this layer. The shape and permeability distribution of the experiment model are similar with those of geological model. A completely contacted water line was designed to simulate the edge water incursion. The invading rule of edge water front was simulated by using two well networks. The results indicate that the permeability of reservoir is the main factor for controlling edge water incursion. The moving rate of water front along the main riverbed is the fastest. The well network is adaptable with the heterogeneity of the reservoir, and the reasonable well distribution is favorable for edge water flooding. Tracer experiments carried out on No. 12 layer indicate that the edge water line is from northwest to southeast at the western riverbed and from northeast to southwest at the eastern river bed. The results of experiment model and inspection with tracer are much alike. The profile control technology was applied in this region, according to the researched results. A good achievement has been obtained. The feasibility of the new model was proved by the application result.