Geofluids / 2019 / Article / Tab 8

Research Article

Damage Mechanism of Oil-Based Drilling Fluid Flow in Seepage Channels for Fractured Tight Sandstone Gas Reservoirs

Table 8

Evaluation of water-phase alkali sensitivity.

Core numberPermeability at different pH values (10-3 μm2)Permeability recovery rate (%)Damage degree
7.09.011.013.0

12544.0330.3113.878.9220.25Serious
13365.3051.3131.296.8510.49Serious

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