NONLINEAR EFFECTS OF FILTRATION IN TRANSIENT OPERATING REGIMES OF WELLS

A model problem on the recovery and redistribution of pressure fields in the stratum on reduction in the fl ow rate of wells has been solved on the basis of the law of filtration with a limiting gradient proposed earlier. The possibility of judging the fi ltration properties of the stratum from the form of the pressure recovery curve has been shown. It has been established that an analysis of this curve enables one to reveal a deviation of the fi ltration law from Darcy′s linear law in low-permeability strata.
   
Author:  V. Sh. Shagapov and O. V. Dudareva
Keywords:  nonlinear filtration, ultralow permeability, limiting pressure gradient, pressure recovery, finite difference method
Page:  291