Environmental Monitoring of Underground Gas Storages

Operation of underground gas storage (UGS) due to cyclical (seasonal) injection and withdrawal of gas. In the thermobaric loads deteriorating technical condition of the wells have production casing leaks, deteriorating the quality of adhesion of the cement stone with string and rock. As a result, leakage of gas from the wellbore, behind-the-casing flows. Formed anthropogenic accumulations of gas in the voids of the cement stone and reservoirs located above the storage reservoir. All this leads to environmental pollution.

Therefore, the development of integrated technologies of monitoring wells, underground gas storage is an important problem. This problem is solved by well logging methods. One of the most informative method is thermometry. The variety of factors affecting the temperature distribution in the well is substantially complicates the solution of tasks in the control UGS, therefore, to assure accurate interpretation of borehole thermometry requires the use of mathematical models and information technology. The use of mathematical models and information technologies allows to determine the sites of wells with casing flows, leakage casing.

Mathematical models and examples of using mathematical models and information technology in solving problems of control over the operation of the UGS.