应用流动物质平衡法评价页岩气可采储量

Application of Flowing Material Balance Method in Evaluation on Recoverable Reserve of Shale Gas

气井可采储量是确定单井合理配产、开发方案调整的重要依据,但是对于页岩气藏,由于储层条件和改造工艺的复杂性与特殊性,很难准确计算出气井的可采储量。针对此问题,结合涪陵页岩气田气井动态生产数据,采用流动物质平衡法统计分析,将页岩气井流动物质平衡曲线分为四种类型,即标准型、两段型、多段型及波动型,并分析每一类曲线特征及形成原因。通过实例计算应用,认为流动物质平衡法可作为页岩气井可采储量计算快速有效的方法。

Recoverable reserve of gas wells is the important basis for determining optimal single well production rate and adjusting development program. However,it is very difficult to calculate accurately a gas well＇s recoverable reserve as for shale gas reservoir which has complex and special reservoir conditions and reform technology. Therefore,this paper divides shale gas well＇s flowing material balance curves into four types-standard form,two-stage form,multistage form and fluctuation form-by combining Fuling shale gas well performance data and using flowing material balance method and analyzes the forming reasons and characteristics of each kind of curve. The application of flowing material balance method proves that this method is a rapid and effective method to calculate shale gas well＇s recoverable reserve.