Min. freq. (Hz) Max. freq. (Hz) Type of data acquisition Type of device used Type of reservoir Sensitivity Analysis 1.5 4 Seismoacoustic background Narrowband, low frequency tremors [1 ] Highly sensitive ground motion velocity receivers; gas reservoir 1-s or 2-s <1000 V/m/s The signals weaken at the rim of the reservoirs and are not observed outside the reservoir area. Seismic-acoustic background noise differs widely. 1 6 Passive seismic low frequency Low frequency microtremors [4 ] Tight gas reservoir and an adjacent exploration area 1500 V/m/s Requiring careful data analysis using microtremors around reservoirs with considerable noise (e.g., production noise) because (a) anomalies caused by noise can be misinterpreted as being caused by the reservoir or (b) such a high-noise environment can overwhelm the signal. 2.5 7 Microseismic Long-period microtremor [3 ] Sedimentary basin Not specified Nature of the soil showing variation in resonance properties. 1 10 Passive seismic low frequency Microtremor [24 ] Basement rock with oil bearing capability Not specified Variation in the field of microseisms due to the level of anthropogenic noise. 1.9 3 Passive seismic low frequency 3-C broadband seismometer [29 ] Giant oil field Not specified Identifying low energy attribute showing low potential. Required improvement in data acquisition and processing methods. 2 13 Passive seismic Microtremor [17 ] Sedimentary basin of the lower cretaceous 1600 V/m/s Identified wide variation in the data resolution in depth. 1 4 Passive seismic low frequency 3-C broadband seismometer [18 ] Appraisal well with partially saturated oil reservoir 0.025 to 5 Hz Acquired data unable to distinguish between a purely elastic and a viscoelastic scattering process. 1 6 Low frequency passive seismic 3-C broadband seismometer [3 ] Stacked reservoirs of lower cretaceous (carbonate reservoir) 2000 V/m/s Microtremor signal has no clear correlation with the microseism signals. 0.0125 62.5 Microseismic Hewlett-Packard (HP) Microelectromechanical Systems (MEMS) seismic accelerometer (capacitive sensor) [30 ] Not specified counts/V– counts/VThe analysis of self-noise level signifies 9.8 ng/ at periods below 0.2 s (frequencies above 5 Hz).