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Studies on Dispersion of Reservoir Rocks Using Multi-band Direct Laboratory Measurement Methodology With µ-CT Scanning
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Many theories have been developed to predict and interpret the seismic wave dispersion in fluid-saturated reservoir rocks. These theoretical models play important roles in understanding the dispersion mechanism on seismic wave propagation, however, still remain unconstrained by experimental data due to the scarcity of laboratory measurements, especially at low seismic frequency range. To obtain the direct laboratory-scale dispersion measurements, especially at the low seismic frequency range, we laboratory have developed systematic measurement techniques to investigate the elastic properties of partially fluid-saturated rock, which cover frequency bands from seismic frequency range to ultrasonic range. The multiband measurement techniques provide great potential to clarify the features of wave dispersion and attenuation in the reservoir rocks from seismic to ultrasonic frequency range, especially due to the presence of fluid. Two devices involved in the direct low-frequency measurement techniques are differential acoustic resonance spectroscopy (DARS) and stress-strain measurement system based on the forced oscillation method, respectively. It proves that the two measurement techniques, in conjunction with traditional ultrasonic method, form the Multi-band direct laboratory measurement methodology relative to dispersion studies on reservoir rocks. Meanwhile, µ-CT scanning-based digital rock technique makes possible to investigate the influence of pore structures and shapes on the seismic wave dispersion.