摘要
水体活跃的水驱气藏在水侵过程中,水体侵入气藏后沿裂缝迅速上窜或横侵,将部分气藏分隔开,出现天然气被包围、封闭的现象。针对这些现象通过建立考虑水封气的物质平衡方程,结合自动拟合方法优化算法,获得了水驱气藏动态储量及水侵量的计算新方法。新方法通过拟合地层压力变化数据,能直接计算水驱气藏动态储量、水封气量及水侵量,同时确定水驱强度指数。将新方法与压降法、水驱气藏曲线拟合法进行比较,经实例计算,新方法计算结果正确、可靠。
During water influx of active water drive gas reservoir,water will quickly channel along fractures or invade across them and separate part of the gas reservoir from each other. For gas encircling and sealing phenomenon, established is a material balance equation which considers gas sealed bywater and combined is automaticfittingmethod’s optimization algorithm and obtained is a newmethod for calculating dynamic reserves and water influx of water drive gas reservoir. The new method is able to directly calculate the water drive gas reservoir’s dynamic geological reserves,gas volume sealed by water and water influx through fitting the formation pressure data and water drive strength index can be determined by using the method. Comparative analyses on results obtained respectively by using this new method, pressure drop method and water drive gas reservoir’s curve-fitting method shows that the new method is accurate and reliable.
出处
《天然气与石油》
2013年第1期63-65,2,共3页
Natural Gas and Oil
基金
国家重大专项"柴达木盆地油气勘探开发关键技术研究"资助(2009E-0307)
西南石油大学创新基金资助(GIFSB0701)
西南石油大学创新基金资助(GIFSB0704)
关键词
水驱气藏
水封气
物质平衡
自动拟合
Water drive gas reservoir
Water- sealed gas
Material balance
Automatic fitting
