狭窄气井的预测模型具有时间依赖机制和应力敏感性效应
Yuhu Bai1, Suran Wang1, Bingxiang Xu1
1CNOOC Research Institute Co., Ltd., Beijing 100028, China.
ACS omega
|November 29, 2023
概括
这项研究引入了破裂密封气井的新模型,考虑了依赖时间的流体分布和应力灵敏度. 该模型通过分析这些因素如何影响天然气井生产率和水产量来改善生产预测.
科学领域:
- 石油工程是石油工程中的一个.
- 储水池模拟器 储水池模拟器
- 地质科学 地质科学
背景情况:
- 紧密气体井的传统模型不考虑时间依赖的储流体分布和应力灵敏度.
- 这种限制导致动态分析和断裂井的产量预测存在重大错误.
- 精确的建模对于优化生产和开发计划在含水密集气体储中至关重要.
研究的目的:
- 开发和验证一个新的预测模型,用于在紧密的天然气储库中断裂井生产.
- 将时间依赖机制和压力依赖的水库透性的影响纳入模型.
- 分析这些因素对天然气井生产率和水生产的影响.
主要方法:
- 开发一个三维嵌入式离散断裂模型 (EDFM).
- 包括时间依赖的机制和压力依赖的水库透性.
- 应用有限体积法来解决过渡性流量方程.
- 与商业模拟器 (Eclipse) 结果和现场应用进行验证.
主要成果:
- 时间依赖的相对透度曲线降低了不可减小的和度,增加了水的透度,降低了气体的透度.
- 这种效应缩短了稳定的气体生产周期,增加了水的生产.
- 储应力敏感性降低了每天的水产量,加快了气井的衰退;控制生产压力差异是关键.
- 该模型展示了适应性,并为现场案例提供了更好的结果.
结论:
- 开发的EDFM通过考虑时间依赖和应力敏感的效应,准确地预测紧密的天然气储库中的破裂井产量.
- 了解这些机制对于优化天然气生产速度和管理水生产至关重要.
- 该模型为开发计划和生产预测提供了有价值的指导,用于含水密集的气体储库.
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