动态物质平衡在海上凝析气田中的应用

气藏储量的确定是安排采气速度、制定合理气藏开发方案的基础。静压法储量计算前提是需关井恢复并获取地层压力，对于凝析气井的关井会造成井底的积液，积液严重者开井后可能不会实现自喷。借助成熟的管流软件建立井筒管流模型，在优选流动相关式的基础上通过井口油压来求取井底流动压力。基于拟稳态条件下油气藏生产特性，应用动态物质平衡法来确定海上某凝析气藏动态储量。该方法不需关井即可获得地层压力，减小了气井产量损失，对于不便经常开展测试作业的海上气井具有十分重要的应用价值。

Application of Dynamic Material Balance in Offshore Gas Condensate Field

The definition of reserves to gas reservoir is the basis to the arrangement of gas production rate and the reasonable development plan. The prerequisite of the static pressure method in the calculation of reserves is to abtain the reservoir pressure by shuting wells, which may cause liquid loading to gas condensate wells. With serious liquid loading, the gas may not flow from the bottomhole to the surface by nature. With the help of mature conduit flow software, the conduit flow model in wellbores was set up. On the basis of optimization of flow correlation equation, the bottomhole pressure can be acquired from tubing pressure. According to the production characteristic of reservoir in pseudosteady state, the dynamic reserve of some offshore gas condensate well was calculated by the dynamic material balance theory. The method can obtain the reservoir pressure without shut-ins, which reduced the production loss. Furthur more, there is an important application value to offshore gas wells which is inconvenient to carry out testing operations.