High-resolution seismic processing based on generalized S transform
Huang Hong1,2, Feng Na2,3, Wang Yanchao1, Cai Yanjie4
1. College of Enhance Oil Recovery, China University of Petroleum (Beijing), Beijing 102249, China;
2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China;
3. CNOOC Research Institute, Beijing 100027, China;
4. Gudao Oil Production Plant, Shengli Oilfield Branch Co., SINOPEC, Dongying, Shandong 257231, China
Abstract:Generalized S transform (GST) can flexibly adjust the change trend of the fundamental window function according to the frequency distribution characteristics and the time-frequency emphasis of seismic data. This transform can also quicken or slow the time-bandwidth change along with the frequency to make the amplitude of the fundamental window function present various nonlinear changes. This will be very helpful for adapting to signal analysis and processing. We introduce window function database, sin (cosin) function database and IFFT in the GST method, the calculation of which is simple, convenient and effective. Then we redistribute the energy of the time-frequency spectrum, and reconstruct signals to obtain the high-resolution seismic data. Test results on model and real seismic data indicate that this method can availably improve seismic signal resolution both in time and frequency domain, and make structural and the lithologic characteristics on seismic sections much clearer.