Abstract:

It’s difficult to deal with complex geological conditions in TOUGH2 simulator, therefore, the method of a complex 3D geological model and coupling pattern numerical simulation were put forward, and the authors developed the corresponding program on the Windows platform. It can be used to the geological modeling created by GMS or Petrel software coupling TOUGH2 numerical model. Through the instance of carbon dioxide (CO₂) geological storage, it can be seen that the stratigraphic structure plays a controlling role of CO₂ space migration, the simulation results show that CO₂ can spread along the back slope formation. Therefore, the coupled method,which provides a new approach and methodology to improve the efficiency of this simulator to deal with complex geological structure, such as ups  and  downs stratum, fault, fold and geological attribute of geological body chang according to the space.

Key words: geologic model, TOUGH2, numerical modeling, CO₂ geological storage