The demand for natural gas is rapidly increasing in Turkey as it is in the rest of the world. However, natural gas reserves and production are rather limited in Turkey. The bulk of the Turkish gets demand is met by imports. Russia currently accounts for 69% of Turkey's gas supplies. Physical shortages might occur; supplies for industrial production and household consumption could temporarily run short. Also, fluctuations in consumption might occur due to climatic reasons or peak daily industrial energy demand Underground gas storage is a necessity in order to regulate these seasonal, daily and hourly fluctuations. In order to effectively design and utilize underground gas storage, it is necessary to identify the market requirements.