Page 8 - Percolation Models for Transport in Porous Media With

vii

9.3 Research on Irreversible Change of Conductivities for Sandy-Argillaceous
Media after Electric 'freatment . . . . . . . . . . . . . . . . . . . . 164

10 Changing Well Production with Electric Treatment 167
10.1 Calculation of Change in Well Production after Electric 'freatment 167
10.2 Reversible Change of Permeability. Determination of Optimal Regime
for Electric 'freatment . 171
10.3 Results of Field Studies . . . . . . . . . . . . . . . . . . . . . . . . 176

11 Gas Colmatation Effect during Electric Action on Saturated Porous
Media 181
11.1 Temperature Effects in Capillaries Caused by Electric Current 182
11.2 Movement and Growth of Bubbles in Capillaries 184
11.3 Permeability Change under Electric Field . . . . . . . . . . . . 192
12 Effects of Acoustic Waves on Irreversible Change of Permeability
of a Saturated Porous Medium 199
12.1 Dissipation of Energy in Viscous Poiseuille Flow . . . . . . . . . . 200
12.2 Destruction of Surface Layer in Pore Channels under Tangential
Stress . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
12.3 Cavitation in Pore Channels under Acoustic Action . . . . . 203
12.4 Dissipation of Acoustic Energy Due to Thermal Slide . . . . 208
12.5 Gas Colmatation During Acoustic Action on Porous Media 210

13 Effect of Acoustic Action on Well ,Production 215
13.1 Laboratory Research on Permeability of Media after Acoustic 'freat-
ment ................................... 216
13.2 Determination of Size for the Acoustic Action Zone. . . . . . . . . 220
13.3 Calculation of Well Rate after Acoustic Action and Results of Field
Experiments . . . . . . . . . . . . . . . . . . . . . . . . 223
13.4 Optimization of Acoustic 'freatment of Porous Media . 225

Bibliography 229

Index 239