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基于文献３中所介绍的数学分析方法（保角变换、镜像反映、等值渗流阻力和叠加原理），以及水平井拟三维的求解思想，提出了气藏多分支不完善水平气井产能的通用计算公式。利用取代比这一概念，提出了一种利用气藏直井产能评价结果进行多分支水平气井产能评价和计算的方法。其结果可对气藏多分支水平气井的产能和影响气井产能的因素进行研究。该计算方法还可用于气田多分支水平气井开发的早期评价。运用本文所提出的方法，对海洋某气田水平气井产量进行了计算，与文献中计算方法结果相比，本文的计算值更加符合气田生产实际
Based on the mathematical analysis methods (conformal mapping, mirror reflection, equivalent seepage resistance and superposition) introduced in reference 3 and the idea of solving the horizontal three-dimensional simulation of horizontal wells, a general calculation of multi-branch imperfect gas well productivity in gas reservoirs formula. Based on the concept of substitution ratio, a method to evaluate and calculate productivity of multi-branch horizontal gas wells using the evaluation results of vertical well productivity of gas reservoirs was proposed. As a result, the productivity of multi-branch gas wells in gas reservoirs and the factors affecting gas well productivity can be studied. The calculation method can also be used for the early evaluation of gas field multi-branch horizontal well development. Using the method proposed in this paper, the production of horizontal gas wells in a gas field in a certain ocean is calculated. Compared with the calculation results in the literature, the calculated values in this paper are more in line with the actual production in a gas field