考虑反凝析影响的边水凝析气藏见水时间预测模型

发布时间：2018-04-27 02:36

本文选题：边水凝析气藏 + 反凝析　；参考：《特种油气藏》2017年05期

【摘要】：凝析气藏开发过程中,当井底流压低于露点压力时,近井地带凝析油析出,形成凝析油聚集区。目前,见水时间预测模型通常不考虑凝析油聚集区凝析油饱和度对气水渗流能力的影响,预测结果有一定偏差。为了更准确地预测凝析气藏的见水时间,基于多孔介质流体质点渗流规律,提出以反凝析区域与未反凝析区域气水流度比之比来反映反凝析区域水相相渗变化,从而推导了新的边水凝析气藏见水时间预测模型。实例研究发现,预测凝析气藏见水时间必须要考虑反凝析区域和未反凝析区域气水渗流能力的不同,反凝析越严重,反凝析区域气水流度比越大,见水时间越早。新模型更深入地分析了反凝析对边水凝析气藏边水推进的影响,对边水凝析气藏的见水预测具有重要指导意义。
[Abstract]:During the development of condensate gas reservoir, the condensate oil precipitates near the well area when the bottom hole flow is lower than the dew point pressure, and the condensate oil accumulation area is formed. At present, the influence of condensate saturation on gas-water seepage capacity is not considered in the prediction model of water appearance time, and the prediction results are deviated to a certain extent. In order to predict the water breakthrough time of condensate gas reservoir more accurately, based on the law of porous fluid particle percolation, it is proposed to reflect the change of water phase permeability in reverse condensate area by the ratio of gas flow degree between reverse condensate area and non reverse condensate area. A new prediction model of water breakthrough time for edge water condensate gas reservoir is derived. The case study shows that the difference of gas-water seepage ability must be taken into account in predicting the water breakthrough time of condensate gas reservoir. The more serious the reverse condensate is, the greater the ratio of gas flow to water flow in the reverse condensate area is, and the earlier the water discovery time is. The new model further analyzes the influence of reverse condensate on the edge water advance of the edge water condensate gas reservoir, which has important guiding significance for the prediction of the water breakthrough of the edge water condensate gas reservoir.
【作者单位】：中海石油(中国)有限公司上海分公司;中国石化上海海洋油气分公司;
【基金】：国家科技重大专项“东海厚层非均质性大型气田有效开发关键技术”(2016ZX05027004)
【分类号】：TE372

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