ATTRIBUTES

Attributes is designed to create and extract a collection of advanced, multi-trace seismic attributes to enhance the seismic interpreter’s ability to analyse frequency content, reduce noise, detect fractures and other discontinuous features in seismic volumes. Single trace attributes are available in other HampsonRussell products.

Seismic Attribute Extraction

Benefits of Attributes Include:

• Extract and display subtle features within seismic data, such as fault discontinuities and structural curvature and frequency content
• Seamless integration with the rest of the tools in HampsonRussell, allowing easy data input and display Computational efficiency greatly enhanced through the use of multi-threading

Attributes Features

• Full integration with the HampsonRussell software package
• Can be applied to 2D, 3D and multi-2D datasets
• Multi-threaded

  Includes a collection of advanced industry-standard and new multi-trace algorithms The attributes extracted in the package include a variety of curvature attributes, the phase congruency and energy-ratio attributes, and both peak and constant frequency analysis using empirical mode decomposition (EMD) and its extensions. The Attributes package contains a complete range of multi-trace edge-preserving filters, such as the Kuwahara and alpha trimmed mean filters for an optimal pre-conditioning of the seismic data.

  Additional single trace attributes such as instantaneous envelope, phase and frequency, trace integration and differencing, and frequency slices are available in other parts of the HampsonRussell suite of programs.

Curvature

Curvature is defined as the rate of change of the direction of a curve in two dimensions. It can be extended to a 3D surface as shown in the figure. The two curves shown here are the maximum curvature, Kmax, and the minimum curvature, Kmin. Both are available within Attributes.

Other curvature attributes include:

• Km = (Kmax+ Kmin)/2, mean curvature
• Kg = KmaKmin, Gaussian curvature
• Kpositive and Knegative, the most positive and negative curvatures
• Kc contour curvature, the curvature of the map contours along the surface
• Kd dip curvature, curvature in dip direction
• Ks strike curvature, curvature in strike direction
• Kn curvedness, the magnitude of the curvature independent of shape

Associated with the dip and strike curvature attributes, the dip and azimuth angles can also be computed.*