AN INTEGRATED NUMERICAL TRANSPORT MODELING APPROACH FOR RISK ASSESSMENT OF GEOLOGICAL SEQUESTRATIONPROJECTS

摘要

Large scale implementation of geological sequestration requires integrtaed tools for risk and consequence assessment at field scale, design of technologies for monitoring and verification, as well as permitting. In this paper, we have extended a reservoir-scale numerical model to develop an integrated framework which can assess the risk and consequences, monitoring networks design and permitting needs. The approach is 'integrated' as it seeks to model the entire geosystem, including the host formation, overburden, air, soil and water environments which are the ultimate risk receptors, and uses the same underlying modelling framework to assess the fate and transport of injected CO_2 and tracers, risk and consequences and sensor-based monitoring network design. The method was used to simulate sequestration of CO_2 in moderate quantities at the Ohio River Valley CO_2 Storage Project, Mountaineer Power Plant in West Virginia, USA.