The maximum effective hole diameter mathematical model describing flow of slightly compressible fluid through a two layer reservoir with crossflow is solved rigorously with consideration of wellbore storage and different skin factors.

The principal factor influence the diffusion of atomized-flow is the over-dam-flow, and the serious zone of the atomized rain is in the vortex zone behind the dam, so, it is significant to study the motion of over-dam-flow and acc.

Based on the principle of grey association analysis,the present paper has put forward a fairly practical and readily programmed cluster method—grey association cluster method,and employed this method to demarcate coal beds and gas beds,discriminate between coal-produced gas bed,oil bed and water bed ,and make lithostratigraphic classification.

A numerical solution for non-Darcian flow toward a well in a leaky aquifer

A mathematical model for groundwater pollution in a leaky aquifer system,which involves the adsorption of semipervious layer,is presented.

The ground water resource in the leaky aquifer is evaluated by the Galerkin s finite element method on condition that the water table of the above recharge aquifer changes with pumping.