Introduction

Based on the mixed coupling theory, a multi-field coupling mathematical model of underground migration of shale gas fracturing pollutants is established. The multi-field coupling numerical calculation model of underground migration of shale gas fracturing pollutants is constructed. The migration process of target pollutants under the action of complex multi-physical fields during fracturing is quantified, and the migration range of pollutants and the impact of groundwater environment are predicted.

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Related research can be divided into：

Part 1. Multi-physics modelling of groundwater contamination in shale gas reservoirs