Published December 2009

Research of pressure reallocation in flat radial micro crack in noncondensable fluid flow

M.A.Mamedova

Current article is devoted to experimental research of pressure reallocation in flat radial micro crack at noncondensable fluid with first gradient pressure show. Research of pressure reallocation in bed carried out in two series. In first series liquid flow was simulated from well to external boundary of reservoir (injection process), and in second series from external boundary of reservoir to well (flow process). Both cases of experiments were made at stationary regime of fluid flow. Experiments were made in radial crack size of 10, 15, 20 and 30 microns. On base of experiments were build curves of dimensionless quantity of pressure change from nondimensional parameter of distance of any point from center of radial micro crack. Equation of line is determine the dependence of pressure decrease in any point of bed from distance r between these points and located well in center of radial bed. For detection of pressure level impact to character of pressure differential p from distance r were build curves of dependences p = f (r), at injection and at flow process at different values of crack size. On base of experimental results of flat radial fluid flow in micro crack it is able to make next concludes: сhoice right parameters and injection direction, which characterize efficiency of process at flooding with viscous liquids purely cracked layers; for gathering higher oil recovery coefficients and having necessary rate of recovery from cracked layers it is passable to determine pressure value in any point of bed on distance r from well, located in center of circle bed; at bed pressure simulation it is able to select efficacious method of pressure keeping.