一种确定带底油凝析气藏气井合理产量的新方法

采用由常规方法确定的带底油凝析气藏气井合理产量进行生产,使得锦州20-2凝析气田某些气井在投产后很快出现了底油锥进。通过对带底油凝析气藏气井系统试井资料的统计分析,找出产气量和压力平方差之间、压力平方差与生产压差之间的关系,进而通过确定气井射孔底界到气藏油气界面的距离计算出气井的合理产量。锦州20-2凝析气田2口井的应用结果表明,用本文提出方法确定的气井产量指导气井生产,可以有效地控制气井底油锥进速度,延长气井的稳产时间。

A new method to determine a reasonable gas production rate for wells in condensate reservoirs with basal oil

In Jinzhou 20-2 condensate field,reasonable gas production rates determined by the conventional method have been used in production of reservoirs with basal oil,and the coning of basal oil occurred in some wells soon after their putting into production.By a statistical analysis of systematical well testing data for the reservoirs with basal oil,the relationships between gas production rate and pressure square difference and between pressure square difference and production pressure drop are found,and new reasonable production rates are calculated for gas wells by identification of the distance from well perforation bottom to gas-oil contact of the condensate reservoirs with basal oil.The application results in two gas wells of the field showed that this method to calculate gas production rate can control effectively the coning rate of basal oil and extend the stable production period of gas wells.