What is dual permeability?
Dual-permeability models assume that the complete porous media system can be represented by two different interacting subsystems: the matrix and the fracture pore domain. For some soils like fractured clays, the fracture domain may be empty, which makes its physical behavior differ significantly from capillary flow.
What is dual porosity?
1. n. [Well Testing] A rock characterized by primary porosity from original deposition and secondary porosity from some other mechanism, and in which all flow to the well effectively occurs in one porosity system, and most of the fluid is stored in the other.
What is the difference between dual permeability and single permeability?
(one is dual permeability flow behavior, and another is single permeability flow behavior). in calculated results of the pressure and the pressure derivative can be discerned. While in calculated results of the pressure and the pressure derivative can be noticed from the table.
What is the difference between single-permeability and dual-permability models of hydraulic fractures?
It indicates that the single-permeability modeling ignores the direct fluid supply from the matrix to the wellbore, resulting in an obvious difference between the dual-permeability and single-permeability models. And there are also some numerical DPDP models used for the simulation of hydraulic fractures and natural fractured reservoirs [15–20].
Can absolute permeability curves be resolved separately in horizontal wells?
The relative permeability curves are constructed assuming a power law parametrization. In the horizontal well case, we show that the absolute permeabilities in the three principal directions can be resolved separately, provided the duration of the test is sufficiently long.
How can we generate estimates of absolute and relative permeability?
We demonstrate that we can generate estimates of absolute permeabilities, the well skin factor, the length of the well and relative premeabilities by matching data to analytical solutions by minimization of a weighted least squares objective function. The relative permeability curves are constructed assuming a power law parametrization.
https://www.youtube.com/watch?v=zgkGdmZtHZg