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首页> 外文会议>SPE Western Regional Meeting >Building and Applying a Physics-Based Production and Associated Gas Lift Model to Better Optimize Prudhoe Bay's West End
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Building and Applying a Physics-Based Production and Associated Gas Lift Model to Better Optimize Prudhoe Bay's West End

机译：建设和应用基于物理的生产和相关的气体升力模型，以更好地优化Prudhoe Bay的West End

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The westernmost wellpads of Alaska's Prudhoe Bay field, known collectively as the "West End," operate under two primary constraints: gas lift supply pressure and a shared production line velocity limitation. Comprised of four primary wellpads with close to 100 operable wells, the West End produces ~3 8,000 bopd, approximately 12% of Prudhoe Bay's daily output. These wells have the lowest gas-oil ratio of all Prudhoe wells-a field generally considered gas handling limited-making them all the more important to have online and optimized. In the past, production sorts (rankings) based on total gas-oil ratio, rules of thumb, and adjustments to individual well gas lift rates were the answer to production optimization. However, over time, production changes occurred that went unexplained, or at least unproven, under certain operational conditions. Additionally, it was never known if the wells were optimized as one congruent system. To address this uncertainty, an industry proven physics based multiphase flow simulator was used to construct two models, one representing the production system and the other representing the gas lift system. The two were then coupled, creating a dual model that allows for the production and gas lift halves to work in tandem and respond to one another. The combined model is now an integral piece of an overarching production model built by BP to model and optimize the vast production system-from sandface to first stage separation-of Prudhoe's surface kit of 47 wellpads and seven production facilities. The model is used on a weekly basis to help optimize West End production and in pipeline replacement studies. Additionally, the model has been used to show that the overall offtake rate along the gas lift supply line is less important than the offtake locations. Using the model, operating limits are being defined for the field operations personnel and production engineers to stay within during certain field condition scenarios which would affect gas lift supply pressures. Such a model could be useful for any production system that is constrained by gas lift supply pressures. It is the aim of this paper to describe the building of a model that successfully captures changes in production to a very large set of interconnected gas lifted wells due to fluctuations in gas lift supply pressure, how it is applied, its successes, its limitations, and its future improvements.
机译：阿拉斯加的Prudhoe湾场最西方的韦伯群体，作为“西端”，在两个主要约束下运行：气体提升供应压力和共用生产线速度限制。由四个主要的井筒组成，靠近100种可操作的井，西端生产〜3 8,000个Bopd，约占Prudhoe Bay的日报的12％。这些井的所有Prudhoe Wells的气体油比最低 - 一个领域通常被认为是气体处理有限的气体处理有限 - 使它们更重要而在线并优化。过去，基于总储气量，拇指规则的生产排序（排名）以及对个体井升降速率的调整是生产优化的答案。但是，随着时间的推移，在某些业务条件下，出现了未解释的生产变化或至少未经证实的制作变化。此外，如果井被优化为一个全等系统，从未知道过。为了解决这种不确定性，使用行业经过验证的物理学的多相流动模拟器来构造两个模型，一个代表生产系统，另一个代表气体升力系统。然后将这两者耦合，创建一个双模型，允许生产和天然气升降一半，以便在串联中工作并互相回应。该组合模型现在是由BP建造的全体制作模型的一体化组件，以模拟，并优化庞大的生产系统 - 从沙面到第一阶段分离 - 普拉杜霍的47个井锅和七种生产设施的套件。该模型每周使用，以帮助优化西端生产和管道替代研究。另外，该模型已被用于表明沿着气体升降供应管线的整体排水率不如排斥位置重要。使用该模型，为现场运营人员和生产工程师定义了操作限制，以便在某些现场条件场景中保持影响，这会影响气体提升供应压力。这种模型对于任何受气体提升供应压力限制的任何生产系统都有用。本文的目的是描述一种模型的建筑，成功捕获生产的变化，由于气体提升供应压力波动，如何应用，其成功，其限制，其限制及其未来的改进。

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