在破裂的低透性气体冷凝水库中进行多相流量的半分析建模
Fuguo Yin1, Shiqing Cheng1, Xiuwei Liu1
1State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing, Beijing 102249, China.
ACS omega
|September 18, 2023
概括
这项研究引入了一个新的模型,用于破裂的低透性气体冷凝库,考虑相变和应力灵敏度. 该模型通过识别10种流量模式来改进参数估计和水库表征.
科学领域:
- 石油工程是石油工程中的一个.
- 储水库工程 储水库工程
- 地质科学 地质科学
背景情况:
- 破裂低透气气凝储 (FLPGCR) 由于相位过渡和应力敏感性而表现出复杂的生产行为.
- 传统模型未能捕捉到多相流和应力灵敏度的合效应,导致井和形成参数估计不准确.
- 井口相位再分配进一步使这些水库中的压力过渡分析复杂化.
研究的目的:
- 为FLPGCR开发一个半分析模型,该模型整合了多相流量,应力灵敏度和井口阶段再分配.
- 提供一种更准确的方法来分析FLPGCR中的压力短暂反应.
- 改善在具有挑战性的水库条件下对井和形成参数的估计.
主要方法:
- 通过将水库划分为N个银行并使用多个环状水库建模辐射和变化,开发了一种半分析模型.
- 采用双孔度模型来表示断裂水库的行为.
- 佩德罗萨变换被用来处理来自应力敏感特征的非线性微分方程.
- 该模型使用CMG软件对数值模拟进行了验证.
主要成果:
- 拟议的模型确定了10种不同的流动模式,提供了增强的诊断能力.
- 井口阶段重新分配被发现会影响最初的过渡流程,缓和压力下降率.
- 观察到压力敏感性会在后期阶段导致压力导数曲线上升趋势,可能被误认为是封闭边界.
- 与传统模型相比,该模型在应用于来自博海油田的现场数据时显示出更高的合适质量.
结论:
- 开发的半分析模型为理解和分析FLPGCR提供了更全面的方法.
- 该模型能够识别多个流动模式,并解释复杂的物理现象,从而提高了水库的特征和参数估计.
- 这些发现强调了在FLPGCR压力过渡分析中考虑井口阶段再分配和应力灵敏性的重要性.
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