ABSTRACT:

We experimentally investigate the effect of the pore fluid on AE in four sandstone plugs cored from a homogeneous slab. These plugs were fully saturated with brine, mineral oil, and hexane, while one of them remained dry. AE level was highest in the hexane-saturated sample, smaller in the oil-saturated sample, and even smaller in the brine-saturated sample. It was even smaller in the dry sample. It appears that in the liquid-saturated plugs, the AE level is monotonically related to the acoustic impedance of the pore fluid – the smaller the impedance the higher the AE. It does not appear to be related to the viscosity of the pore fluid.

Keywords:
acoustic emission experiment, hexane-saturated sample, relation, axial stress, Upstream Oil & Gas, mineral oil, ae level, sandstone, hexane, dry sample
Subjects:
Reservoir Characterization
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2019. American Rock Mechanics Association
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