Math modelling of undeground water infiltration dynamics in exhausted gas deposit

The studying goal is the state of groundwater flow, what is changing during the development of gas field, as well as basing of possibility for reserves assessment of related mineral water. Asthe main settlement in the hydrogeological scheme showing the dynamic of ground water flow approximation adopted single-layer aquifer, located under the Cenomanian horizon roof, taken as impenetrable border (top). The lower boundary of the aquifer thickness, as a part of regional water system is in the prop. During exhausting gas deposit the gas pressure in the gas cap, lying above the aquifer thickness, falls and in formedunload pore space with a very high porosity parameters (less pore space occupied by gas non exhausting) comes up a surface watered thickness. There are two models, both processing simultaneously showing changes of hydrodynamic flow state. Two processes are represented with math models - gas-water contact raise and the process of pressure decrease in watered thickness as ground water fills the pore space that is being freed. The modelling results are: the surface map of gas-water contact, map of Cenomanian groundwater pressures head and graph of changes in time - the value of influx from below and the appropriate value of outflow into capacity.
Materials and methods
Math modelling of hydrodynamic process.
Results
A model of a real object with reproducing of hydrodynamic process in underground water flow is worked out.
Сonclusions
The technique can be used to estimate groundwater resources in developing gas fields.