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Simulation of shale gas transport and production with complex fractures using embedded discrete fracture model
AIChE Journal ( IF 3.7 ) Pub Date : 2018-01-03 , DOI: 10.1002/aic.16060
Wei Yu 1 , Yifei Xu 2 , Malin Liu 3 , Kan Wu 1 , Kamy Sepehrnoori 2
Affiliation  

The goal of this study is to develop a new model to simulate gas and water transport in shale nanopores and complex fractures. A new gas diffusivity equation was first derived to consider multiple important physical mechanisms such as gas desorption, gas slippage and diffusion, and non‐Darcy flow. For complex fractures, a state‐of‐the‐art embedded discrete fracture model (EDFM) was implemented. Numerical model is verified against a commercial reservoir simulator for shale gas simulation with multiple planar fractures. After that, a series of simulation studies was performed to investigate the impacts of complex gas transport mechanisms and various fracture geometries on well performance. The critical parameters controlling well performance are identified. The simulation results reveal that modeling of gas production from complex fractures as well as modeling important gas transport mechanisms in shale gas reservoirs is extremely significant. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2251–2264, 2018

中文翻译:

使用嵌入式离散裂缝模型模拟复杂裂缝的页岩气运输和生产

这项研究的目的是开发一个新的模型来模拟页岩纳米孔和复杂裂缝中的气体和水的运移。首先推导出一个新的气体扩散方程,以考虑多种重要的物理机理,例如气体解吸,气体滑移和扩散以及非达西流动。对于复杂的裂缝,采用了最先进的嵌入式离散裂缝模型(EDFM)。数值模型通过商用油藏模拟器进行了验证,该油藏模拟器用于模拟具有多个平面裂缝的页岩气。此后,进行了一系列模拟研究,以研究复杂的气体传输机制和各种裂缝几何形状对油井性能的影响。确定控制井性能的关键参数。模拟结果表明,对复杂裂缝的产气进行建模以及对页岩气藏中重要的输气机理进行建模是非常重要的。©2018美国化学工程师学会AIChE J,64:2251–2264,2018
更新日期:2018-01-03
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