【摘要】 南黄海盆地中部隆起发育巨厚的中、古生界海相地层,油气勘探前景良好,但该地区地震地质条件复杂,地震资料品质差、信噪比低。通过地震波场数值模拟分析认为,浅部强屏蔽层,中、古生界内部地层弱反射系数及多次波干扰等几方面因素是影响地震反射成像品质的主要原因。针对这一难题开展了中、古生界老地层的地震资料精细处理关键技术研究,形成了多次波组合压制、多域噪音衰减、提高信噪比等几项关键技术系列。实际资料处理实践表明,针对性的处理技术系列有效地提高了中、古生界资料的信噪比,地震成像品质较以往大大提高,处理效果良好。更多还原

【Abstract】 It is believed that thick Mesozoic-Paleozoic marine strata are widely distributed in the central uplift region of the South Yellow Sea Basin.There is enormous hydrocarbon potential.However,the geophysical and geological conditionsare extremely complicated in this region.The quality of seismic profiles is low,and the S/N of seismic data very high.Upon seismic wave field numerical simulation,it is discovered that the low quality of seismic sections comes from various reasons,such as the strong shielding layer in shallow part,weak reflectance of the Mesozoic-Paleozoic strata,and intense multiple energy.To resolve the problems,the authors made a series of researches to improve the key techniques for seismic data processing aiming at the Mesozoic-Paleozoic.Several key technique series are proved effective,which include combined multiple suppression,noise attenuation in disparate domain,improving S/N.The S/N of the Mesozoic-Paleozoic seismic data is effectively improved,and the seismic imaging quality becomes better.更多还原