Carbonate reservoir is one of the important reservoir in the world. Because of the characteristics of carbonate reservoir, horizontal well and acid fracturing have become a key technology for efficiently developing carbonate reservoir. Establishing corresponding mathematical models and analyzing transient pressure behaviors of this type of well‐reservoir configuration can provide a better understanding of fluid flow patterns in formation as well as estimations of important parameters. A mathematical model for a oil‐water two‐phase flow multiple‐fractured horizontal well with multiple finite‐conductivity fractures in triple media carbonate reservoir by conceptualizing vugs as spherical shapes is presented in this article. A semi‐analytical solution is obtained in the Laplace domain by using source function theory, Laplace transformation, and superposition principle. Analysis of transient pressure responses indicates that nine characteristic flow periods of multiple‐fractured horizontal wells with multiple finite‐conductivity fractures in triple media carbonate reservoir can be identified. Parametric analysis shows that water saturation of matrix, vug and fracture system and acid fracture, fracture half‐length, fracture number, fracture spacing and acid fracture conductivity can significantly influence the transient pressure responses of multiple‐fractured horizontal wells with multiple finite‐conductivity fractures in triple media carbonate reservoir. The model presented in this article can be applied to obtain important parameters pertinent to reservoir or fracture by type curve matching, and it can also provide useful information for optimizing fracture parameters.

中文翻译：

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三重介质碳酸盐岩油藏多导裂缝多水平裂缝油水两相流动态分析

碳酸盐储层是世界上重要的储层之一。由于碳酸盐岩储层的特征，水平井和酸化压裂已成为有效开发碳酸盐岩储层的关键技术。建立相应的数学模型并分析这种类型的油藏构造的瞬态压力行为可以更好地理解地层中的流体流动模式以及重要参数的估计。本文通过将孔洞概念化为球形，建立了油水两相流多裂水平井中具有多个有限导电裂缝的数学模型。通过使用源函数理论，拉普拉斯变换，在拉普拉斯域中获得半解析解，和叠加原理。对瞬态压力响应的分析表明，可以确定三重介质碳酸盐岩储层中具有多处有限导电裂缝的多裂口水平井的9个特征流期。参数分析表明，基质，孔洞和裂缝系统的水饱和度以及酸裂缝，裂缝半长，裂缝数量，裂缝间距和酸裂缝电导率会显着影响具有多处有限导电裂缝的多裂缝水平井的瞬态压力响应。在三重介质碳酸盐岩储层中。本文提出的模型可用于通过类型曲线匹配获得与储层或裂缝有关的重要参数，也可为优化裂缝参数提供有用的信息。