Application of three-dimensional volumetric curvature attributes to fault identification
Curvature attribute is based on the curvature changes of geologic bodies to delineate structures effectively, such as faults, fractures, flexures and folds. This article introduces the theory of curvature attributes, analyses the limitation of two-dimensional surface curvature attributes, and proposes a new approach to calculate three-dimensional volumetric curvature attributes. According to the theory of complex seismic traces we calculated the instantaneous frequency and instantaneous wave number of a point in the seismic data volume to obtain its apparent dip, and then we got the curvature of the point through the surface fitting by its neighboring traces and samples. We applied the threedimensional volumetric curvature attributes to practical seismic data and compared with two-dimensional surface curvature attributes. The results of the application proved that three-dimensional volumetric curvature attributes have good effect on structure identification especially in the identification of faulted structures such as faults and fractures, unfaulted structures such as flexures and folds and geometry description of geologic bodies.
NETL
NSTL
万方数据
维普
