Mechanism of Forming Low Resistivity in Shale Reservoirs

Figure 7

Effect of lamination length on rock resistivity. In the low-resistivity lamination, when the semipenetration area only accounts for 0.38%, the rock resistivity at the matrix resistivity of 100 Ω·m drops to 53.2% of the origin matrix resistivity, which is 53.2 Ω·m. Moreover in this lamination, when the full penetration area accounts for 0.5%, the rock resistivity at the matrix resistivity of 100 Ω·m drops to 16.68 Ω·m. The simulation verifies that the lamination greatly affects the resistivity even if the penetration area is extremely small.