Although currently, large-scale and multilateral horizontal wells are an important way to improve the oil recovery in the unconventional reservoirs, the flow behavior of fluid from the reservoir into the horizontal wellbore becomes more challenged compared to the single small-scale horizontal well. One of the main challenges is that pressure loss from the well completion section and wellbore cannot be ignored in the coupling process between the reservoir and the horizontal well. In this paper, a new method is presented to solve the coupling flow between the reservoir and the horizontal well with different well completions. The new coupling model is compared with Ouyang’s model (1998) and Penmatcha’s model (1997), and the predicted data are consistent with each other at both early and late times. Meanwhile, four different cases have been proposed to verify the application of the new coupling model with different well completions, and the results indicate that the uneven inflow profile can be effectively alleviated via reasonable completion parameters and different well completions. Based on two types of flow-node units, it can quickly model and solve the coupling problem between the reservoir and the horizontal well with complex completion cases. It can also depict the inflow profile of the horizontal well with different well completions, which is conducive to understand the coupling process. The new coupling model can provide theoretical support for further optimization of completion parameters and well completions and finally improve oil recovery.

中文翻译：

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不同完井水平与水平井之间的半解析耦合模型

尽管目前，大型和多边水平井是提高非常规油藏采油率的重要方法，但是与单个小型水平井相比，从油藏到水平井眼的流体流动行为变得更具挑战性。主要挑战之一是，在储层和水平井之间的耦合过程中，来自完井段和井眼的压力损失不容忽视。本文提出了一种解决完井情况不同的储层与水平井耦合流的新方法。将新的耦合模型与欧阳模型（1998年）和彭帕契塔模型（1997年）进行了比较，预测数据在早期和晚期都相互一致。与此同时，提出了四种不同的情况来验证新的耦合模型在不同完井情况下的应用，结果表明，通过合理的完井参数和不同完井次数，可以有效地缓解不均匀的流入剖面。它基于两种流节点单元，可以快速建模并解决完井情况复杂的水平井与储层之间的耦合问题。它也可以描述完井不同时水平井的流入剖面，有利于理解耦合过程。新的耦合模型可以为进一步优化完井参数和完井提供理论依据，并最终提高采油率。结果表明，通过合理的完井参数和不同的完井量，可以有效地缓解不均匀流入剖面。它基于两种流节点单元，可以快速建模并解决完井情况复杂的水平井与储层之间的耦合问题。它也可以描述完井不同时水平井的流入剖面，有利于理解耦合过程。新的耦合模型可以为进一步优化完井参数和完井提供理论依据，并最终提高采油率。结果表明，通过合理的完井参数和不同的完井量，可以有效地缓解不均匀流入剖面。它基于两种流节点单元，可以快速建模并解决完井情况复杂的水平井与储层之间的耦合问题。它也可以描述完井不同时水平井的流入剖面，有利于理解耦合过程。新的耦合模型可以为进一步优化完井参数和完井提供理论依据，并最终提高采油率。它可以快速建模并解决完井情况复杂的储层与水平井之间的耦合问题。它也可以描述完井不同时水平井的流入剖面，有利于理解耦合过程。新的耦合模型可以为进一步优化完井参数和完井提供理论依据，并最终提高采油率。它可以快速建模并解决完井情况复杂的储层与水平井之间的耦合问题。它也可以描述完井不同时水平井的流入剖面，有利于理解耦合过程。新的耦合模型可以为进一步优化完井参数和完井提供理论依据，并最终提高采油率。