Research on 3D Seismic Feature Enhancement Processing and Description of Strike Slip Fault Zone

Due to the small longitudinal fault displacement and weak ultra-deep seismic signal of strike slip fault zone, the conventional pre-stack depth migration seismic data cannot meet the requirements of fine description of ultra-deep fault zone. In order to improve the imaging accuracy of the fault zone and guide the interpretation, description, evaluation and deployment of the strike slip fault zone, taking the three-dimensional seismic data of the development area of the strike slip fault zone in Shunbei area as an example, a set of seismic feature enhancement processing and description technology of the strike slip fault zone is established, which is mainly based on the fidelity and amplitude preserving optimization processing, spectrum restoration and resolution improvement processing, spectrum decomposition processing, and frequency domain multi-scale fault detection processing technology, This technology combination effectively widens the frequency band of seismic data, improves the resolution of seismic data, improves the imaging accuracy of ultra-deep strike slip fault zone, and provides a high-quality data foundation for the fine interpretation, description and evaluation, and three-dimensional carving of ultra-deep strike slip fault zone. Combined with the previous research results in Shunbei area, the comprehensive use of spectrum recovery to improve the resolution processing, spectrum decomposition processing, frequency domain fault detection data, the prediction effect of fault zone characteristics and fault reservoir relationship at different scales is better, which provides technical support for further evaluation of fault zones and deployment of well locations.