Modelling the reservoir-to-tubing pressure drop imposed by multiple autonomous inflow control devices installed in a single completion joint in a horizontal well
Modelling the reservoir-to-tubing pressure drop imposed by multiple autonomous inflow control devices installed in a single completion joint in a horizontal well
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对安装在水平井单个完井接头中的多个自主流入控制装置施加的油藏至油管压降进行建模
DOI：
10.1016/j.petrol.2020.106991
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发表时间：
2020
影响因子：
--
通讯作者：
Lei Q
中科院分区：
文献类型：
--
作者：
Lei Q
自主流入控制装置（AICD）用于在储层和生产井的油管之间引入额外的压降，该压降取决于流入装置的流体相：当不需要的相（例如水或气体）进入AICD时，引入更大的压降。额外的压降通常在储层模拟模型中使用拟合到单个AICD的实验数据的经验关系来表示。如果每个完井接头配备有多个AICD，则该方法可能不正确，因为不同AICD处的流量可能不同。我们使用高分辨率的数值模拟来确定水平井中安装在单个完井接头中的两个AICD所引入的总附加压降。该模型捕获通过内部环空进入每个AICD的油和水的多相流。我们探讨了一些相关的油-水流入的情况下，不同的流量和含水率。结果表明，当只安装一个AICD时，附加压降与实验推导的经验公式一致。然而，如果存在两个AICD，则模拟器预测的附加压降与经验关系之间存在显著差异。这种差异的发生是因为每个AICD具有不同的总相和单独相流速，并且最终的稳态流是由系统中出现的自组织机制产生的。我们报告的差异作为含水率相关的校正的经验方程，它可以用于油藏模拟模型，以更好地捕捉包含两个AICD的单个完井的压降。我们的研究结果强调了理解AICD如何改变流入生产威尔斯井的流量的重要性，并对提高油藏模拟模型中先进威尔斯井的代表性具有重要意义。
Autonomous inflow control devices (AICDs) are used to introduce an additional pressure drop between the reservoir and the tubing of a production well that depends on the fluid phase flowing into the device: a larger pressure drop is introduced when unwanted phases such as water or gas enter the AICD. The additional pressure drop is typically represented in reservoir simulation models using empirical relationships fitted to experimental data for a single AICD. This approach may not be correct if each completion joint is equipped with multiple AICDs as the flow at different AICDs may be different. We use high-resolution numerical modelling to determine the total additional pressure drop introduced by two AICDs installed in a single completion joint in a horizontal well. The model captures the multiphase flow of oil and water through the inner annulus into each AICD. We explore a number of relevant oil-water inflow scenarios with different flow rates and water cuts. Our results show that if only one AICD is installed, the additional pressure drop is consistent with the experimentalzly-derived empirical formulation. However, if two AICDs are present, there is a significant discrepancy between the additional pressure drop predicted by the simulator and the empirical relationship. This discrepancy occurs because each AICD has a different total and individual phase flow rate, and the final steady-state flow results from a self-organising mechanism emerging from the system. We report the discrepancy as a water cut-dependent correction to the empirical equation, which can be used in reservoir simulation models to better capture the pressure drop across a single completion containing two AICDs. Our findings highlight the importance of understanding how AICDs modify flow into production wells, and have important consequences for improving the representation of advanced wells in reservoir simulation models.
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DOI：
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发表时间：
2013
期刊：
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DOI：
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发表时间：
2012
期刊：
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