使用双相回流数据估计有效的断裂孔积和浸泡驱动石油回收的效率
Kai Liao1, Shuang Yang2, Juan Pang3
1School of Petroleum, China University of Petroleum-Beijing at Karamay, Karamay 834000, China.
ACS omega
|June 23, 2025
概括
这项研究引入了一种新的方法来分析页岩油库中的回流数据,量化沉浸式油回收和断裂孔体积. 这些发现揭示了关闭期如何影响不同骨折类型的断裂流体效率和沉浸力.
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:
- 页岩油库中长时间的关闭周期通过沉浸促进了油的迁移到裂中,有助于初始生产.
- 现有的断裂特征模型主要侧重于水产,忽视了沉积油回收的量化.
- 早期了解压裂操作的影响对于优化页岩油开采至关重要.
研究的目的:
- 提出一种新的双相油/水回流分析方法,用于估计有效的断裂孔体积 (V_efi) 和浸泡油回收效率.
- 通过整合速度下降分析,扩展流动物质平衡 (FMB) 模型和油/水比分析来开发预测断裂特性的工作流程.
- 提供早期评估压裂操作对页岩油库的影响.
主要方法:
- 利用速率下降分析和诊断图表来识别断裂枯竭特征,并估计有效断裂系统中的水量.
- 开发了一种扩展的流动物质平衡 (FMB) 模型,包含两相油/水流,以估计浸泡驱动的油量.
- 将生产油/水比分析与FMB模型结合起来,以确定不同断裂领域 (支持和未支持) 的沉浸恢复.
主要成果:
- 水相回流数据的半日志图表显示了波下降趋势,表明断裂系统内的水量.
- 通过使用油相回流数据,FMB模型成功地确定了断裂耗尽期,并量化了沉浸式油回收.
- 数字模拟证实了拟议的工作流程在各种参数上的准确性和稳定性.
- 现场数据应用显示,在长期井封闭后,断裂流体效率显著下降,并突出了支和未支断裂之间的沉浸效率差异.
结论:
- 开发的双相回流分析方法准确地估计了有效的断裂孔体积和浸泡油回收效率.
- 该研究提供了关于关闭期和断裂特征对页岩油生产的影响的宝贵见解.
- 这些发现为早期评估压裂操作和页岩油勘探中的储性能提供了实用工具.
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