通过对初始和第二个回流数据的比较分析,评估生产过程中的断裂体积损失
Chong Cao1,2, Tamer Moussa1, Hassan Dehghanpour1
1Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 2W2 Canada.
概括
这项研究比较了来自井的初始和第二次回流数据,以量化生产后的断裂体积损失. 在第二个回流期内,有效骨折体积减少了3-45%.
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
- 水力压裂 (Hydraulic Fracturing) 是一种水力压裂技术.
背景情况:
- 在生产过程中由于压力耗尽而导致的断裂体积变化.
- 存在有限的模型来估计从短暂数据的断裂体积损失.
- 最初和第二个回流数据为骨折行为提供了独特的见解.
研究的目的:
- 比较初始 (FBi) 和第二 (FBs) 的回流数据,以评估骨折体积变化.
- 根据断裂体积动态评估井性能并优化断裂操作.
- 在回流期之间分析有效骨折体积 (Vef) 和驱动机制的变化.
主要方法:
- 使用率-正常化压力 (RNP) 与物质平衡时间 (MBT) 诊断图.
- 分析了来自Niobrara和Codell形成 (DJ盆地) 的六个多断层水平井的回流数据.
- 实际断裂体积 (Vef),压缩驱动指数 (CDI),碳化合物驱动指数 (HDI) 和水驱动指数 (WDI) 的计算变化.
主要成果:
- 在FB期间,RNP图片的斜率通常高于FBi,这表明骨折体积损失.
- 与FBi相比,实际骨折体积 (Vef) 在FB期间下降了3% - 45%.
- 压缩驱动指数 (CDI) 仍然占主导地位,但在FB下降了16%,被更高的HDI所抵消.
结论:
- 在初始和第二个回流期之间发生了有效骨折体积的显著损失,这归因于压力耗尽.
- 这些发现有助于了解水库的行为,并优化液压压裂策略.
- 将FBi和FBs数据进行比较,为评估随时间推移的骨折性能提供了一种有价值的方法.
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