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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。
Multi-branch well drilling wells increasing, there is an urgent need to establish a variety of multilateral wells well flow dynamic relationship. In view of the fishbone type multilateral well, the three-dimensional pressure distribution in the fishbone multi-branch well is derived by fully considering the three-dimensional steady flow in the reservoir and the characteristics of multi-branch wellbore. The multi-branch wellbore There is a calculation model of pressure drop in wellbore with and without confluence, and a dynamic mathematical model of well-flow distribution considering the pressure drop in multi-lateral wellbore is established, which provides methods and methods for capacity calculation and applicability screening. The results show that: (1) For homogeneous reservoirs, with the total length of fish-bone multilateral wells increasing, the number of branches increases, and the production capacity Will reduce; (2) fishbone type multilateral well is more suitable for the development of thinner reservoirs, especially for thin reservoirs with bottom water.