坡折带区立体震源与平面震源资料对比分析OACSTPCD

Deep-water areas have gradually become the exploration targets of offshore oil and gas resources.Due to the intricate geolog-ical conditions of these areas,seismic imaging of moderately deep reservoirs suffers low signal-to-noise ratios and resolution,inevitably affecting the exploration and exploitation of oil and gas resources.To improve the quality of seismic data of moderately deep reservoirs in deep-water areas,this study first acquired seismic data at the same location in a slope break using stereo and planar sources under the same acquisition parameters.Then,after being processed using the same workflow,the seismic data were subjected to comparative analy-sis from the perspective of wavelets,shot gather spectra,near-trace spectra,superimposed profile spectra,and final imaging.The results indicate that the wavelets of a stereo source outperformed those of a planar source in terms of energy intensity and ghost reflection inter-ference.Moreover,for moderately deep reservoirs of the deep-water area,a stereo source exhibited broader frequency bands and especial-ly rich frequencies within 30～80 Hz.These features enhanced the resolution of seismic profiles and the imaging quality of seismic data.Thus,compared to planar sources,stereo sources enjoy more advantages in improving seismic imaging of moderately deep reservoirs in deep-water areas.Therefore,stereo sources can be employed to acquire seismic data of moderately deep reservoirs with complex geolog-ical conditions in deep-water areas,and the purpose is to improve the imaging quality of seismic data.