摘要
水平井筒内的摩擦压降对于水平井的生产动态来说是一个具有支配性的因素,筛管和割缝衬管完井的摩擦压降将会变得尤其重要。对水平井单相稳流系统,综合考虑摩擦损失造成的水平井筒压降和变质量流特点,联立水平井的油藏渗流和水平井筒中的流动,建立了水平井筒存在压力梯度的变质量耦合模型,对模型微分方程进行数值求解。对参数进行敏感性分析以讨论摩擦压降对产能的影响。该模型还可以用于确定合理的水平井筒段长度。
Frictional pressure drop within the wellbore is frequently a controlling factor on the performance of long horizontal wells.The frictional pressure drop could be especially significant in wells completed with screens and slotted liners.For a single phase steady system,considering the pressure drop created by friction and the character of the variable mass flow in the wellbore,a variable mass model with pressure gradient is developed by coupling the percolation in reservoir with the flow in the wellbore.The model equations are solved numerically.The effects of the friction on well productivity is discussed from the sensitivity analysis.As an application of the result,the optimum horizontal well length can be calculated with this model.
出处
《断块油气田》
CAS
2007年第5期53-55,66,共4页
Fault-Block Oil & Gas Field
关键词
水平井
摩擦压降
耦合
变质量流
horizontal well,frictional pressure drop,coupling,variable mass flow.
