砾岩油藏历史拟合方法——以五_2西区克下组油藏为例

Study on Meth ods for History Match of Conglomerate Reservoir—an example of Lower Karamay reservoir in West Dis trict5-(2).

砾岩油藏非储集层砂体吸水会造成模拟压力偏高,从而影响了砾岩油藏历史拟合的精度。利用油藏数值模拟手段,通过设置虚拟层及虚拟井技术,计算出了非油层的吸水量,为合理确定单井及区块配注量提供了依据。通过对克拉玛依油田五2西区克下组砾岩油藏及各单井主要指标的生产历史拟合,修正了地质模型和生产动态模型,更好地反映了该油藏的非均质性。提出了这类油藏的开发调整方案,并经实施符合率高、效果较好。

The water-intake of non-reservoir sandbody in conglomerate reservoir tends to give high simulated pressure.This paper solved such problems and estimated the amount of water-intake in non pay zone using technologies of reservoir numerical simulation and setting virtual strata and virtual wells.Based on the results of production history match of district-wide and individual well,geological model and production performance model were corrected,further showing heterogeneity of the reservoir.Recommended adjusting programs are highly fitted to the field situation and good results are obtained.