| 摘要 |
A method for stratigraphic analysis of seismic data, known as GeoLeaf, comprises: selecting a seismic data volume comprising a plurality of samples; selecting a number of horizons (TH, BH, TPH, BPH, SMH) within the seismic data volume; selecting a scale of interest within the seismic data volume, which ranges from 500 m up to the size of the entire seismic data volume; applying an attribute function to at least one of the selected number of horizons (TH, BH, TPH, BPH, SMH) at the selected scale of interest; and displaying a stratigraphic attribute, which represents a geologic feature, such as a seismic facies attribute (FM), an unconformity attribute (Zmax/Z) and/or a thinning attribute (Z1/Z2) that highlights a rate of thickness change of a formation layer between adjacent horizons, as a result of applying the attribute function at the selected scale of interest. This novel class of attributes assists a seismic interpreter to recognise, analyse, and capture moderate to large-scale seismic geometries (typically 500 m to 50 Km) and to better understand the basin development over geologic time and therefore the spatial distribution of reservoir-, seal- and source rocks. |
