Study Of High Resolution Horizontal Stacking Method

With the rapid development of country economic, more and more energy sources were demanded, especially oil and natural gas. In view of this kind of situation, the high resolution seismic exploration came to be very important research direction of seismic exploration technology. The same as, high resolution seismic data processing is one of multitude technology, and it is on the basis of the stacking method. Only exist better stacking section, will many posterior processing meant to advance resolution and signal-noise ratio. At present , we know many stacking methods, but with the more detailed study those methods had been found to appear some limitations. Therefore, they could hardly satisfy requirement of high resolution processing precision, it is very necessary to research an advanced stacking methods.On basis of high resolution seismic prospecting theory and elder research, we studied deeply stacking methods. First, we performed residual moveout correction in seismic gathers to get good stacked seismic sections, thus it could provide favorable foundation with stacking in phase. There are still some residual moveout on the moveout-corrected data due to the limitations of various moveout correction methods when they are used on real data. This paper presents a method of moveout correction on the theoretical basis that the arrival times of signals lie within the phase spectrum of seismic trace. We may get their moveout and phase difference through selecting appropriate reference trace and comparing between it and CDP gather of NMO, static corrections, thereby perform appropriate correction to those errors. Next, seismic data errors corrected was processed with high resolution methods to progress the seismic data signal-noise, especially high frequency signal. We analyses used stacking methods, and concludes their merit, weakness and applicability. The paper presents a frequency division stacking in frequency domain that divides CDP gather into several windows in temporal space , then processes amplitude spectrum stacking and phase spectrum stacking of each gather. Therefore, the method will obtain preferable stacking portion with high resolution.By the means of processing artificial seismic data and real seismic data, we obtain some contrast of resolution and signal-noise ratio between common stacking and new method, which would confirm the rationality of new method. Studied residual moveout correction and frequency division stacking method will improve greatly seismic data signal-noise ratio and resolution, that will realize high resolution seismic data processing in deed.