Features of Determining Hydrodynamic Parameters in Production Wells with Overflow after Level Recovery

Abstract

The article deals with methods of assessing the hydrodynamic parameters of the bottomhole formation zone (reservoir pressure, productivity factor, hydraulic conductivity, piezoelectric conductivity) when developing and testing the wells in non-standard conditions (overflow after the level recovery). Theoretical aspects of the Horner method and its modifications for the pseudo-steady state (closed-hole recovery) and the Masket-Yakovlev method that is based on the assumption of an infinite value of the piezoconductivity coefficient (rigid reservoir model, open-hole recovery) are considered. The results of experimental approbation of the optimal method of hydrodynamic studies are presented when selecting the time range, the dependence of the pressure recovery in the well on time, for processing the results of the studies when developing wells with a compressor or swab, if the wellhead level is reached in the process of recovery and subsequent overflow. The bottomhole pressure and compressor pressure dependences on time have been built, as well as an indicator diagram based on the results of studying a well in the Kumkol oil and gas field, and the relationship between the well flow rate and bottomhole pressure has been analyzed.