Speaker: He Xiaoming, Associate Professor, Missouri University of Science and Technology, USA
Date:Jan. 23, 2017
Time: 3:00 pm - 4:00 pm
Location: Room 1032, Block B, Zhixin Building, Central Campus
Sponsor: School of Mathematics, Shandong University
We propose and numerically solve a new model considering confined flow in dual-porosity media coupled with free flow in embedded macro-fractures and conduits. Such situation arises, for example, for fluid flows in hydraulic fractured tight/shale oil/gas reservoirs. The flow in dual-porosity media, which consists of both matrix and micro-fractures, is described by a dual-porosity model. And the flow in the macro-fractures and conduits is governed by the Stokes equation. Then the two models are coupled through four physically valid interface conditions on the interface between dual-porosity media and macro-fractures/conduits, which play a key role in a physically faithful simulation with high accuracy. All the four interface conditions are constructed based on fundamental properties of the traditional dual-porosity model and the well-known Stokes-Darcy model. The weak formulation is derived for the proposed model and the well-posedness of the model is analyzed. A finite element semi-discretization in space is presented based on the weak formulation and four different schemes are then utilized for the full discretization. The convergence of the full discretization with backward Euler scheme is analyzed. Four numerical experiments are presented to validate the proposed model and demonstrate the features of both the model and numerical method, such as the optimal convergence rate of the numerical solution, the detail flow characteristics around macro-fractures and conduits, and the applicability to the real world problems.
Mr. He Xiaoming is an associate professor in the Department of Mathematics and Statistics in Missouri University of Science and Technology. He got his Bachelor's and Master's degrees of Computational Mathematics in Sichuan University in 2002 and 2005 respectively, and his Master's degree and PhD of mathematics in Virginia Tech in 2007 and 2009. Then, he did his postdoctoral research in Florida State University in 2009, supervised by Prof. Max Gunzburger. He worked as an assistant Professor in the department of Mathematics and Statistics from 2010, and was promoted as an associate professor in 2016.
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Edited by: Zhang Kaige, Song Yijun