Publications

Microtremor data recorded at proven hydrocarbon reservoirs display characteristic spectral anomaly at low frequencies between 1–6 Hz. This spectral anomaly is called Hydrocarbon Microtremor (HM) signal. Analysis of this characteristic spectral anomaly has been used as a technique to provide information about the presence of hydrocarbon reservoir or Direct Hydrocarbon Indicator (DHI). This study is the application of passive seismic method for ‘ATA’ field development. Several techniques are used to extract the information about the presence of hydrocarbon reservoir based on spectral and polarization attributes. All attribute values extracted from spectral and polarization analyses were mapped and interpretated. However, spectral and polarization analysis without noise analysis can lead to misinterpretation. Thus, noise identification must be performed to estimate and analyze noise contribution to the HM signal. The results obtained from this study provide spatial distribution of attribute values, extent of potential hydrocarbon reservoir, and how much the noise contributes to the spectrum and attribute values.