摘要
凝析气井井底附近存在复杂的多相渗流,在进行干扰试井时井底压力响应表现出明显的复合油藏特征。基于Xu&Lee凝析气井试井分析数学模型,建立了考虑变井筒存储的凝析气井干扰试井解释数学模型。通过数值方法对其求解,绘制压力及压力导数曲线,并分析了观测井位置、区域流度比、激动井表皮系数及井筒存储系数对压力和压力导数动态的影响。研究结果表明,观测井在凝析气井的不同流动区域表现出各异的曲线特征,激动井表皮系数及井筒存储参数对压力和压力导数动态的影响也与普通油气井不同。
Complex multi-phase flow always exists in the bottom of condensate gas well,and bottom-hole pressure response exhibited obvi-ously composite reservoir characteristics during interference well test.Based on the Xu & Lee's mathematical model of WAT of condensate gas well,we established mathematical model of interference well test interpretation for triple medium condensate gas well taking into account of variable well-bore storage.Then through the simulate solution of the model.we plotted its pressure and pressure derivative curves.and further analyzed the impact of locations of observation well.ratio of region mobility.skin coef-ficients of activation wells and well bore storage parameters on pressure and pressure derivative behaviors.The result shows that observation well exhibits different curve characteristics in different flow regions of condensate gas well.emotional well skin factor and wellbore storage parameters also exerts different effects on pressure and pressure derivative dynamics form the ordinary well tests.This work has not only practical meaning to the interpretation analysis of condensate gas interfere well test data,but also theoretical guidance significance to the interference well test of composite reservoir.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第2期98-100,104,共4页
Petroleum Geology and Recovery Efficiency
基金
国家自然科学基金项目"异常高压气井(藏)开发动态模拟及最优控制研究"(50874094)
关键词
凝析气
干扰试井
压力动态
数值反演
压力导数
condensate gas
interference well test
pressure behaviors
numerical inversion pressure derivative
