底水油藏中隔夹层对水平井开发影响研究

The Impact of Interlayer to Horizontal Wells Production in Bottom Water Reservoir

结合物理模拟、数值模拟、实际井动态分析等多种方法,进一步研究隔夹层对水平井开发效果的影响。通过建立三维可视化底水油藏物理模型,研究水平井隔夹层大小对水平井效果的影响,表明靠近水平井远离油水界面的隔夹层下部出现"屋檐油",此处的剩余油为油藏高含水期挖潜剩余油的主要方向。结合底水油藏数值模型,研究不同隔夹层展布范围以及不同隔夹层分布位置下水平井的开发动态。随着隔夹层展布范围增加,隔夹层距离油水界面越远(越靠近水平井下方),则水平井开发效果越好。通过对国内某典型油田水平井生产资料进行分析,所得结论与物模、数模结果一致。

Based on physical simulation, numerical simulation and well performance analysis, the impact of in- terlayer is researched to horizontal well in bottom water reservoir. Through the establishment of bottom water reser- voir physical model, the influencing factors of interlayer size is studied. The result indict that the interlayer bottom appear ＂ eaves oil＂. Combined with numerical model, the result is that with the size of interlayer increased, the distance from the oil water interface father, the horizontal wells development the better. Through analysis the actual production data of horizontal wells, the result is consistent with the numerical simulation result and physical model.