Volume 57

Numerical Simulation of CO2 Plume Migration in the Tiaohu Formation Saline Aquifer, Santanghu Basin, China Danhe Fu, Yu Liu

Abstract

Deep saline aquifers remain a critical option for large-scale CO2 storage to mitigate global climate change. The Permian saline aquifer in the Tiaohu Formation of the Santanghu Basin has emerged as an ideal target for CO2 geological sequestration due to its superior storage conditions. This study employs the ECO2N module within the TOUGH2-PetraSim software to establish a numerical model of multiphase flow in a basalt-tuff reservoir system. The research reveals the fluid migration characteristics following CO2 injection into the saline aquifer, with a focus on analyzing the influence of well orientation on CO2 plume migration, including the variation patterns of CO2 gas saturation and solubility. Research demonstrates that horizontal wells enable more uniform spatial distribution of CO2.

Keywords CO2 geological sequestration, Santanghu Basin, numerical simulation