TY - JOUR

T1 - Experimental Determination of Poroperm Properties of Fractured Porous Geomaterials within the Framework of Dual-Permeability Model

AU - Nazarov, L. A.

AU - Golikov, N. A.

AU - Skulkin, A. A.

AU - Nazarova, L. A.

N1 - The study was supported by the Russian Science Foundation, grant no. 23-27-00339. Публикация для корректировки.

PY - 2023/8

Y1 - 2023/8

N2 - The experimental procedure is developed and tested on a laboratory scale and using layered samples of manmade geomaterials. Within the dual-permeability model, the procedure enables determining parameters that govern fluid flow and poroelastic deformation in fractured porous rock masses, namely, fracture permeability K1 and mass transfer coefficient β , as well as their dependence on stresses σ . The testing procedure is proposed and implemented. In the procedure, under the stepwise increasing normal stress σ , the stationary flow rates Q1(σ) and Q2(σ) are measured in a quasiregular fractured porous sample at the preset pressure difference: using a standard setup (Q1) and in closed end-face fractures Q2(σ). The mathematical model of the experiment is constructed, and the analytical solution of the problem on stationary flow is obtained: pressure patterns in fractures, and stress-dependence of flow rates. The experimental data interpretation algorithm enables calculating K1 and β by the recorded flow rates Q1 and Q2 . It is shown that the permeability K1 is proportional to σ-2 , and β remains almost unchanged.

AB - The experimental procedure is developed and tested on a laboratory scale and using layered samples of manmade geomaterials. Within the dual-permeability model, the procedure enables determining parameters that govern fluid flow and poroelastic deformation in fractured porous rock masses, namely, fracture permeability K1 and mass transfer coefficient β , as well as their dependence on stresses σ . The testing procedure is proposed and implemented. In the procedure, under the stepwise increasing normal stress σ , the stationary flow rates Q1(σ) and Q2(σ) are measured in a quasiregular fractured porous sample at the preset pressure difference: using a standard setup (Q1) and in closed end-face fractures Q2(σ). The mathematical model of the experiment is constructed, and the analytical solution of the problem on stationary flow is obtained: pressure patterns in fractures, and stress-dependence of flow rates. The experimental data interpretation algorithm enables calculating K1 and β by the recorded flow rates Q1 and Q2 . It is shown that the permeability K1 is proportional to σ-2 , and β remains almost unchanged.

KW - fractured porous rock mass

KW - fractures

KW - laboratory experiment

KW - manmade geomaterial

KW - mass transfer coefficient

KW - matrix

KW - permeability

KW - regular layered sample

KW - stress

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85178245029&origin=inward&txGid=53ac08e71145a16066090adcc8a19772

UR - https://www.mendeley.com/catalogue/27f24e46-6e75-39d8-bf1b-f71919ed8b9d/

U2 - 10.1134/S1062739123040026

DO - 10.1134/S1062739123040026

M3 - Article

VL - 59

SP - 536

EP - 547

JO - Journal of Mining Science

JF - Journal of Mining Science

SN - 1062-7391

IS - 4

ER -