Patent ID: 7013724

Claim:
A method of well, well bottom zone and bed characteristics determination including installing on an injection line in front of a wellhead a measuring section in the form of a calibrated pipe of a length allowing fixing pressure drops when liquids with minimum hydraulic friction flow, the section being provided with assembled flow sensors and pressure sensors and a differential manometer with impulsive pipes connected with a beginning and an end of the measuring section; impulsive non-stationary injection of a reagent; measuring at the wellhead pressure, consumption and pressure drops during injection of a working agent into the well; after which, recalculating measurement data to bottom hole conditions; determining a stored flow rate and work required for a non-steady state flow of an agent consumption unit in the well bottom zone; calculating skin effect co-efficient by these figures taking into account of current conductivity of the bed, the latter being determined by the results of a short-term impulsive non-stationary well intake capacity testing with a bed fluid; changing agent injection mode, when the well bottom zone filtration characteristics required and determined by the skin effect calculated by the stored flow rate and the agent flow consumption unit work in the well bottom zone are achieved, taking into account of the current conductivity of the bed, wherein, for each measurement under conditions of impulsive non-stationary injection of the bed fluid during each injection mode, the repression function is determined, said function characterizing non-steady state flow in the well bottom zone during a fluid injection mode, plotting for each mode a graph of repression function vs. injection time logarithm in this mode, highlighting initial sloping straights, finding parameters of said highlighted straights by the least-squares method, by which it is possible to determine water permeability and piezoconductivity of polluted bottom hole formation zone as well as its radius and skin-effect co-efficient.