摘要
厚层非均质气藏存在严重的层间和层内干扰,且大斜度井井斜角随储层深度增加而变化,与现有产能计算方法的假设条件不符。本文建立考虑井斜角变化和井筒内流量变化的斜井井筒压力损失计算方程,将井口油压或测点压力折算到气层中部压力,4口实测井计算相对误差在3%以内,表明计算模型精度高。针对多层厚层强非均质性气藏各产层储层性质差异大的问题,分层计算各小层产能,并引入层间干扰系数对合采方程进行修正,对比实例计算结果与实测结果,方法具有较高的可靠性。
The thick heterogeneous gas reservoir has serious interzonal and intra-zonal interference,and the well inclination changes with the increase of reservoir depth,which is inconsistent with the assumptions of the existing productivity calculation methods.In this paper,the calculation equation of wellbore pressure loss considering the change of wellbore inclination angle and the change of wellbore flow rate is established.The calculation error of wellhead oil pressure or measuring point pressure is converted to the pressure in the middle of gas reservoir.In order to solve the problem of large difference of reservoir properties among different production layers,the production capacity of each small layer is calculated by layers,and the interlayer interference coefficient is introduced to modify the combined production equation.The calculated results are compared with the measured results,and the method has high reliability.
作者
廖恒杰
何贤科
刘一凡
朱文娟
蒋哲昊
程时清
LIAO Hengjie;HE Xianke;LIU Yifan;ZHU Wenjuan;JIANG Zhehao;CHENG Shiqing(Shanghai Branch,China National Offshore Oil Corporation(China)Limited,Shanghai 200335,China;College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China)
出处
《计算物理》
北大核心
2025年第4期439-447,共9页
Chinese Journal of Computational Physics
基金
国家重大专项(2016ZX05027-004)资助。
关键词
厚层多层气藏
强非均质性
大斜度井
井筒压力
气井产能
thick multilayer gas reservoir
strong heterogeneity
high inclination well
wellbore pressure calculation
productivity
