Publications

Fault damage zones have been previously investigated in relation to various fault parameters. However, most of the previous research is outcrop-based studies, and only a few of them have sought to investigate the fault damage zone in seismic data. The focus of this study is to investigate fault damage zone width in relation to fault throw from seismic data utilising seismic attributes. Seismic attributes are primarily used to provide a measurable width of damage zone. The workflow applied in this study is first finding the appropriate attributes that capture the fault damage zone and then growing a 3D geobody using the attributes which represents the fault damage zone morphology. The study is undertaken on time-migrated seismic data in Indian field which is located in the Exmouth Sub-basin, a part of the Northern Carnarvon Basin. The data used is a subset of a full 3D volume and is 12.5 x 3.8 km in size. Using the combination of Structurally Oriented Semblance, Dip and Tensor attributes, a number of faults trending NE-SW, were successfully mapped out and used to analyse the size of fault damage zone and fault throws. The maximum fault throw attained from Fault-2 and Fault-37 are 34ms and 24ms respectively while the maximum damage zone widths are 204m and 192m respectively. Despite the geobody limitation due to resolution issue, a positive nonlinear relationship following power-law distribution is found to be an appropriate scaling of fault damage zone with fault throw. The relationship is followed with a certain amount of error estimation which is presumed to result from a large variation and scattering of data.