АНАЛИЗ КВАЗИСТАЦИОНАРНОГО ПОДХОДА ПРИ ФИЛЬТРАЦИИ ОДНОРОДНЫХ ЖИДКОСТЕЙ В ТРЕЩИНОВАТО-ПОРИСТЫХ СРЕДАХ

Аннотация

Subject of investigations: fractured porous media, saturated by homogeneous liquid. Aim of investigations: arguing the quasi-stcady approach at the modeling of liquids filtration processes in fractured porous media (FPM), estimation some non-stcady approaches. Methods of investigations: to set filtration equations of homogeneous liquids in FPM by using basic principles of mechanics (balance laws) as well as phenomenological approaches, widely using in subterrian hydro-gas-mcchanics, numerical solving of these equations by checking stability and convergence of methods, physical interpretation of results and its comparison with existing results. Results achieved and their novelty: in the work a character of the solutions jumps spreading is firstly investigated for the “truncated” and simplified systems of filtration equations in FPM. With accounting the non-steady correction in the massexchange flow from porous blocks into fractures a system of filtration equations of homogeneous liquids in FPM is derived. Ranges of correct works of these equations with respect the characteristic time of the non-steady correction arc estimated. To investigate a dynamics of the mass-exchange flow equations of filtration in an element consisting of an fracture and a surrounding porous block were derived. The results of the work allow us in some sense to determine a mechanism of the massexchange process in FPM and to estimate the ability of the classic quasi-stcady approach. The results of the work allow us also to make important conclusions about dynamics of mass-exchange flow and ability of quasi-stcady approach. Practical value: results achieved can interpret oil, gas, water and condensate flows in oil-gas-condensate reservoirs. Degree of embed and economic effectively: the work has an theoretical character, achieved results allow us to make a more deep insight into the mechanism of liquids in FPM. Fields of application: results of the work can be used at hydrodynamical test of fractured porous oil reservoirs, at oil and gas recovery processes.