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Sensitivity analysis of technical and economic parameters for natural gas management in enhanced oil recovery projects

机译:增强采油项目中天然气管理技术和经济参数的敏感性分析

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摘要

Since oil reservoirs have different properties, each reservoir performs differently during enhanced oil recovery (EOR) processes. In some cases, water injection is the most effective method, while in others, gas injection or other methods will result in better performance. Most reservoir simulations assume that the amount of injection fluid is sufficient. However, in practice, the amount of available gas is enough to supply only a limited number of reservoirs. This study presents a comprehensive model which examines oil reservoirs in concert based on mathematical programming, and considers the competition between them. This model entails sensitive analysis of gas injection projects in order to determine effective factors (technical and economic parameters) on decision-making relating to gas injection projects. Results show that technical and economic parameters such as oil price, gas quality and gas price variation have a marked effect on economic results and may lead to favorable economic conditions. Variations were made in the model regarding changes in interest rate, number of wells and injection pressure, but these variations did not lead to unfavorable economic conditions; in other words, changes in these factors had no significant effect on stability.
机译:由于储油层具有不同的特性,因此每个储层在提高采油率(EOR)过程中的性能都不同。在某些情况下,注水是最有效的方法,而在其他情况下,注气或其他方法会导致更好的性能。大多数油藏模拟都假定注入流体量足够。然而,实际上,可用的气体量足以仅供应有限数量的储层。这项研究提出了一个综合模型,该模型基于数学程序设计来共同检查油藏,并考虑它们之间的竞争。该模型需要对注气项目进行敏感分析,以便确定与注气项目相关的决策的有效因素(技术和经济参数)。结果表明,诸如油价,天然气质量和天然气价格变化等技术和经济参数对经济结果有显着影响,并可能带来有利的经济条件。该模型对利率,井数和注入压力的变化进行了变动,但这些变动并未导致不利的经济条件;换句话说,这些因素的变化对稳定性没有显着影响。

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