At AES, reservoir enginereing studies are done into two parts. The "basic reservoir engineering analysis"  and "dynamic simulation model".

The subsurface department has a vast number of pre-defined studies and reports, relying on their own experience and knowledge in NCS, Middle East, MENA, Canada, South America, and South East Asia. Some of them are designed to fit right into specific chapters of the Middle Eastren carbonate reservoirs which demanding the high knowledg of the Zagros area.