氮气泡沫、水交替驱采油数值模拟研究

The Numerical Simulation Research of the Water Alternate Nitrogen Gas Foam Displacement

根据M井区油藏的地质特征、流体特征、氮气泡沫驱油试验数据和注水开发生产历史 ,利用多组分模型软件 ,在完成地层原油相态拟合、驱油试验数值模拟拟合、三维地质模型的建立和油田开发生产历史拟合之后 ,研究其剩余油分布规律。在动态预测方案中 ,模拟计算了 3种氮气泡沫、水交替驱采油方案 ,共计 1 9套采油方案。在分析对比了各个采油方案的主要开采动态指标之后 ,该井区通过氮气泡沫、水交替驱采油与注水采油相比 ,9a后增产原油(1 .6～ 4.2 )× 1 0 4 m3,而万方氮气换油率为 3 3 7～ 42 6m3。

Based on the geological characteristics, the fluid phase behavior, the experiment data of nitrogen gas foam and the production history of M well group, the residual oil distribution is investigated by using a compositional model after building its three dimensional geological model, matching the phase behavior and displacement experiment, completing its production history matching. Three patterns of water alternate nitrogen gas foam displacement are computed. There are nineteen schemes.By analyzing the main production performance parameters of these schemes, the water alternate nitrogen gas foam displacement can increase oil production of 1. 6 × 10 4 to 4. 2 × 10 4m 3, after 9 years, compared with the water injection exploitation. And the increased oil production is 33. 7 to 42. 6 m 3 for per 10 4m 3 nitrogne gas.