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2015/04/07 14:00 Researcher Chunghao Lee（Exploration and Development Research Institute, CPC Corporation, Taiwan）
Seminar
Poster： ╱ Post date：2015-04-01NCU IHOS Seminar Announcemnet
Speaker：Researcher Chunghao Lee
Place：S-325, Science Building 1
Abstract：
Title：Experimental Investigation of Impacts of Fluid Properties and Fracture Orientation on Imbibition Front Evolution in Fractured Permeable Media
Speaker：Researcher Chunghao Lee
Exploration and Development Research Institute, CPC Corporation, Taiwan
Time：04/07（Tue.）14：00
Place：S-325, Science Building 1
Abstract：
Capillarity, gravity and viscous forces are the three major driving forces control the fluids migration in geologic formations. However, experimental working addressing the simultaneous action of these forces under fracturing condition is limited. Understanding how these variables affect fracture-matrix transfer mechanisms and invasion front evolution are of crucial importance to production evaluation and remediation operation. The present work is one component of a multi-variable, experimental analysis of fracture-matrix flow including the effects of flowing conditions, rock and fluid properties, and fracture orientation. In this study, we monitor and analyze transfer mechanisms through three different fluid pairs with different viscosity ratio using medical X-ray computed tomography. These experiments are then extended to include five different fracture configurations in the case of water displacing air to evaluate the impact of fracture orientations. A detailed delineation of the impact of viscosity ratio as well as fracture orientation on the dynamics of fracture-matrix transport is presented. Co-current and counter-current flow mechanisms are evident from experimental observation at different fluid pairs where co-current flow dominates in the case of water displacing air, while countercurrent flow dominates in the case of water displacing kerosene. The influence of fracture orientation on the shape of the imbibing front, and ultimate recovery, was minimal for the time- and length-scales considered in this investigation. However, the varying relevance of gravity at different fracture inclinations still causes changes in water saturation distribution behind the imbibing front, and breakthrough time. Results from this investigation not only strengthen fundamental understanding of multiphase flow in fractured permeable media, but also provide reference background to qualify the migration and trapping of leak-off fracturing fluids in hydraulic fracture under shut-in conditions.
Last modification time：2015-04-01 PM 2:56
