双孔介质油藏抽汲井渗流模型及精确解  

Percolation model and rigorous solution of suction well in double porosity reservoir

作　　者：刘洪[1] 王新海[1] 王祖文[2] 毕全福[2] 

机构地区：[1]长江大学,湖北荆州434023 [2]中油新疆石油管理局,新疆克拉玛依834027

出　　处：《特种油气藏》2007年第5期73-75,共3页Special Oil & Gas Reservoirs

基　　金：中国石油天然气集团公司石油科技中青年创新基金项目部分成果(项目编号:05E7046)

摘　　要：双重孔隙介质油藏油井抽汲生产将使井底压力变化十分复杂。通过建立了双重孔隙介质油藏圆形封闭地层中心一口抽汲井渗流模型,考虑到非自喷井极易出现段塞流,给出了段塞流段井筒储集系数修改方法。在综合考虑井筒储集效应、漏失量和表皮系数的情况下,应用拉普拉斯变换和贝塞尔函数对渗流模型求解,得到模型在拉普拉斯空间的精确解,由此可计算出抽汲过程中任意时刻的地层压力和井底压力。Bottom hole pressure changes complicatedly in suction well of double porosity reservoir.Percolation model for a central suction well in circular sealed reservoir with double porosity is established.Considering that non-flowing well tends to have slug flow,the model gives an amendment method of wellbore storage coefficient for slug flow interval.With comprehensive consideration of the effect of wellbore storage,leakage and skin factor,the model is solved by applying Laplace transform and Bassel function,thus obtained a rigorous solution of the model in Laplace domain space,hence reservoir pressure and bottom hole pressure can be calculated at any time during pumping process.

关 键 词：双重孔隙介质 抽汲井 渗流模型 拉普拉斯变换 贝塞尔函数 精确解 

分 类 号：TE319[石油与天然气工程—油气田开发工程]