Abstract: It is imperative to develop inflow performance relationships of each type of multilateral wells because the number of multilateral well is rapidly increasing.In this paper the 3-D of pressure distribution in formation during the production of a herringbone multilateral well is derived based on that the 3-D steady flow in reservoir and the features of the flow in multilateral wellbores are fully considered.Thus a model of IPR for herringbone multilateral wells with considering pressure drops in the multilateral wellbores is developed.It provides a method and tool for calculating productivity and screening applications.It has been used to analyze the effect of some relevant parameters on productivity of a herringbone multilateral well.The studies showed that(1) for a homogeneous reservoir the productivity will decrease with the increase in multiple branches when the overall lengths of all branches is specified;and that(2) it is more effective for a heringbone multilateral well to drain the thin reservotrs.

Key words: Herringbone, Multilateral well, Inflow performance relationship, Productivity, Mathematical model

摘要： 多分支井钻井井数日益增加,迫切需要建立各类多分支井的向井流动态关系.针对鱼骨型多分支井,在充分考虑油藏内三维稳定渗流及多分支井井筒内流动特点的基础上,导出了鱼骨型多分支井生产时油层内三维压力分布,提出了多分支井筒内有会合流和无会合流的井筒内压降计算模型,从而建立了考虑多分支井筒内压降影响的向井流动态关系数学模型,为产能计算、适用性筛选等提供了方法和手段.利用所建模型研究了有关参数对鱼骨型多分支井产能的影响,研究表明;(1)对于均质油藏,在鱼骨型多分支井总长度一定的情况下,分支数增加,产能会降低;(2)鱼骨型多分支井更适合开发厚度较薄的油藏,尤其适合于有底水的薄油藏.

关键词: 鱼骨型, 多分支井, 向井流动态关系, 产能, 数学模型