基于水驱特征曲线的水驱气藏水侵量计算  

作　　者：王进 

机构地区：[1]中海石油(中国)有限公司上海分公司研究院,上海200335

出　　处：《科技创新与应用》2024年第16期103-107,共5页Technology Innovation and Application

摘　　要：针对水驱气藏水侵量计算过程复杂的问题,提出通过建立水驱物质平衡方程与水驱特征曲线之间的关系来求解水侵量的方法。首先从气水两相渗流规律及地层流体产能方程出发,得到水驱气藏的水驱特征曲线,即气井见水后的阶段累产气量与水气比的自然对数呈线性关系,通过斜率即可求解气井见水后的动态储量,加上气井见水前的累产气量作为总的动态储量,结合水驱物质平衡方程,可以计算出水驱气藏的水侵量。实例应用表明,水侵量计算结果在地质气藏模型中能很好地吻合上生产历史数据,证明该方法具有较强的实用性,能够为水驱气藏动态评价与治水措施的选择提供依据。In view of the complex calculation process of water influx in water drive gas reservoir,a new method is proposed to solve the water influx by establishing the relationship between water drive material balance equation and water drive characteristic curve.Firstly,the water drive characteristic curve of water flooding gas reservoir is derived from the gas water two-phase seepage law and formation fluid productivity equation,that is,the cumulative gas production after water breakthrough is linear with the natural logarithm of water gas ratio.The dynamic reserve of gas well after water breakthrough can be solved by slope,and the cumulative gas production before water breakthrough is taken as the total dynamic reserve.Secondly,according to the total dynamic reserves of gas wells,cumulative water production and high pressure physical properties of natural gas,the water invasion of water flooding gas reservoir can be calculated by substituting the water flooding material balance equation.The application results show that the method has high accuracy and practicability,and can provide basis for dynamic evaluation of water drive gas reservoir and selection of water control measures.

关 键 词：水驱气藏 水侵量 动态储量 水驱特征曲线 相对渗透率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]