垂直井的压力过渡行为,考虑动态水和动态诱导断裂:理论和案例研究
Zhipeng Wang1, Zhengfu Ning1, Wenting Guo1
1State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China.
ACS omega
|July 24, 2023
概括
工程师开发了一种洪水诱导的动态断裂 (WIDF) 模型,以分析水注射期间的动态断裂行为. 该模型准确地捕捉了水和断裂关闭现象,改进了水库分析并防止过早放弃井.
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
- 断裂力学 断裂力学 断裂力学
背景情况:
- 水注入可以造成诱导骨折,连接井,导致水突破.
- 诱导骨折表现出动态的延伸和关闭,使水库模拟复杂化.
- 现有的数值方法很难准确地建模这些动态断裂过程.
研究的目的:
- 开发一个数学模型来描述洪水引起的断裂的动态行为.
- 将动态水,多动态关闭和断裂存储现象纳入模型.
- 为了提高参数解释和模型选择在水库分析的准确性.
主要方法:
- 开发了洪水诱导的动态断裂 (WIDF) 模型.
- 利用格林函数和纽曼产物法,在紧密的水库中实现单相水流.
- 采用边界元素方法用于离散断裂建模和特征线方法用于压力响应分析.
- 应用拉普拉斯变换和Stehfest数值倒数用于模型解决方案.
主要成果:
- 在类型曲线上确定了不同的动态水流量 (DWH) 和多动态关闭流量 (MDCF) 模式.
- 量化了阻力和惯性系数对DWH系统的影响.
- 确定断裂存储系数,动态断裂关闭率和诱导断裂关闭半径控制了MDCF制度.
- 用现场案例验证了WIDF模型,显示了改进的参数解释和透率估计.
结论:
- 该WIDF模型准确地捕捉了动态诱导断裂行为,包括水和关闭现象.
- 该模型增强了水库参数识别,并有助于选择合适的水库模型.
- 使用WIDF模型对诱导骨折的动态识别可以优化注入策略,防止过早抛弃井.
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