Open AccessExchange flow numerical method of dual-porosity model for different matrix size in 2D oil-water imbibition
Author(s) -
Huan Zheng,
Min Wang,
Xiaohong Wang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/3/032026
Subject(s) - imbibition , porosity , scaling , wetting , mechanics , porous medium , permeability (electromagnetism) , materials science , geotechnical engineering , saturation (graph theory) , capillary action , multiphase flow , capillary pressure , geology , petroleum engineering , mathematics , geometry , composite material , physics , chemistry , germination , biology , biochemistry , botany , combinatorics , membrane
Spontaneous imbibition is a common natural phenomenon in porous media. For natural fractured reservoir with a large number of hydrophilic and oleo-phobic rock blocks, the imbibition displacement of non-wetting phase by wetting phase with the dominant effect of capillary force is an important mechanism in exchange flow between matrix block and fracture in reservoir recovery. Scientists have concluded a scaling model which includes the permeability, porosity, boundary conditions, fluid-solid interaction and other factors though lots of experiments. In this study, after proposing appropriate characteristic scale in different periods of imbibition, the approximate saturation solution in one-dimensional imbibition obtained on the basis of scaling model is extended to two-dimensional process. Then, the exchange flow numerical method of dual-porosity model for two-dimensional multiphase imbibition is obtained. The results of simulation example show that the numerical method of exchange flow in this paper is more accurate than that of traditional dual-porosity model under different matrix rock size.