ANSDIMAT

ANSDIMAT is a new software package for the analytical and numerical processing of the direct and inverse flow probes.

The program is intended for processing of pilot-filtration samples by analytical and graph-analytical methods practically on all widespread in hydrogeological practice calculation schemes. The complex includes non-stationary and stationary analytical solutions for the pressure reservoir, depressurized reservoir, planar inhomogeneous reservoir, aquifer complexes with overflow and layered (multi-reservoir) systems.

The software package includes analytical solutions describing drawdown in fractured-porous media of various structures, solutions for profile- and formation-anisotropic reservoirs, for inclined reservoirs and reservoirs of variable thickness. Filtration parameters are determined based on level changes both in the main reservoir and in adjacent well and low-permeability layers. Pilot and observation wells can be both perfect and imperfect in terms of the degree of penetration. Additionally, the test and observation well capacity, skin effect, and the effect of the aeration zone on level change are taken into account. In addition, solutions are presented for deviated and horizontal wells, for express-testing and pumping with constant drawdown, carried out in different conditions. Most of the schemes take into account the influence of plan and profile boundaries. It is possible to process pumping both with one test well and with several test wells. The flow rate of each well can change arbitrarily in time. The processing is carried out both by drawdown period and by level recovery.

Numerical codes for solving axisymmetric filtration problems are integrated into the program, as well as a program for solving inverse problems adapted for analytical and numerical units.