摘要
建立了地下储气库注气系统物质平衡和能量平衡动态模型,选取井底作为节点,将注气系统划分为流入和流出两部分,建立了垂直管流流入和地层渗流流出注气节点模型,计算求得流入和流出动态特性参数,据此分析注气系统的注气动态。将气体在井筒中从地面到井底的垂直流动过程视为拟稳定状态流动,用"平均温度和平均偏差系数法"及"Cullender和Smith"方法计算井底压力;在气体从井底段到地层段的径向渗流过程引入表皮因数和流量相关表皮因数,计算气井的注气量。以xx36井区斜4-2井和斜3-6井为例进行注入流出组合计算,结果与实际情况基本吻合。
The paper established the material balance and energy balance dynamic models of underground gas storage filling system and selected the downhole as nodes to divide the filling system into two parts-inlet flow and outlet flow. With the established node model of vertical conduit flow inlet flow and outlet flow of stratal filtrate,a calculation provided the dynamic characteristic parameters of inflow and outflow,which can be used to analyze the gas filling status. Regarding the vertical gas flow from ground to the downhole as a semi-steady state flow,the downhole pressure is calculated by 'mean temperature & mean deviation coefficient' and 'Cullender & Smith' methods. Adopting the surface index and flow-related surface index into the radial flow from the downhole to the stratas,the gas filling volume can be calculated. Taking the Directional 4-2 and Directional 3-6 in some 36 Wellfield as an example,group calculation of the inflow and out flow was made,and the result basically agreed with the practical conditions.
出处
《油气储运》
CAS
北大核心
2011年第6期431-434,392,共4页
Oil & Gas Storage and Transportation
关键词
节点分析法
地下储气库
动态模型
注气量
表皮因数
node analysis method,underground gas storage,dynamic model,gas filling volume,surface index
