Three Dimensional Fault Enhancement Technique Based on Multi-directional Recognition

1. Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083; 2. Geoscience Research Institute of Shengli Oilfield, Sinopec, Dongying 257015; † E-mail: asp2562@yafco.com

Abstract In order to apply the fault enhancement method to improve the accuracy of fault identification, a threedimensional fault enhancement method based on multi-directional recognition is developed. This method applies directional filtering to enhance the continuity of the seismic events and suppress the background noise, and applies edge-preserving filtering to preserve the fault information in seismic profiles. This method is further improved in two aspects. 1) Multi-directional fault recognition is designed to adapt to the presence of inclined formations. 2) The two-dimensional fault enhancement method is extended to the three-dimensional one which achieves the effect of three-dimensional fault enhancement with a lower amount of calculation. The applications on synthetic data and the three-dimensional post-stacked actual data show that the proposed method can effectively suppress the background noise, enhance the continuity of the seismic events, and improve the resolution of the fault image, which is conducive to the subsequent structural interpretation. Key words fault enhancement; three dimensional seismic data; orientation filter; edge-preserving filtering

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