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Generalized inflow performance relationships for horizontal gas wells

机译：水平气井的一般流入性能关系

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摘要

The analytical inflow performance relationships (IPRs) of horizontal gas wells are presented in this paper for different reservoir boundary conditions. Even though reservoir simulation models (numerical models) may give more flexibility and detailed results of oil and gas production, analytical models are commonly used in the field for quick, practical and reasonable estimation of well performance. The analytical models are especially attractive when working on single well design and performance optimization. Similar to vertical well models, the analytical models for horizontal wells are developed for specific conditions. The IPR equations for horizontal gas wells are categorized into three boundary conditions; constant boundary pressure (steady-state flow condition), no-flow boundary (pseudo-steady-state flow condition), infinite acting reservoir (transient flow condition). For each condition, the IPR equations of horizontal gas wells are presented and the limitation and appropriate application are discussed carefully. Moreover, this paper discusses the effect of critical parameters such as permeability anisotropy, wellbore length, non-Darcy flow and near wellbore formation damage on the inflow performance of horizontal gas wells. These equations provide the reservoir and production engineers with an invaluable tool in well structure design, development plan, and their daily practice dealing with horizontal wells.
机译：本文针对不同的储层边界条件，提出了水平气井的分析入流性能关系（IPR）。尽管储层模拟模型（数值模型）可能会提供更大的灵活性和油气生产的详细结果，但分析模型通常在该领域中用于快速，实用和合理地评估油井性能。当进行单井设计和性能优化时，分析模型特别有吸引力。与垂直井模型类似，针对特定条件开发了水平井分析模型。水平气井的IPR方程可分为三个边界条件。恒定边界压力（稳态流动条件），无流动边界（伪稳态流动条件），无限作用储层（瞬态流动条件）。针对每种情况，提出了水平气井的IPR方程，并仔细讨论了其局限性和适当的应用。此外，本文讨论了诸如渗透率各向异性，井筒长度，非达西流动和近井筒地层损害等关键参数对水平气井的流入性能的影响。这些方程为油藏和生产工程师提供了在油井结构设计，开发计划以及他们日常处理水平井方面的宝贵工具。

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