CAJ | 학술논문

北部湾盆地福山凹陷火成岩分布广泛,与浅表层围岩形成很强的纵波和横波波阻抗界面,对有效地震波的下传与上返形成了很强的屏蔽,致使来自深部的反射信息能量大幅衰减,严重影响了该区地震资料品质,因此火成岩多次波干扰是该地区地震资料处理所面临的首要难题.通过分析研究火成岩分布特征、火成岩与多次波之间的关系,在波动方程模型正演理论指导下,探索压制多次波干扰的处理技术与方法,提出了对近炮检距多次波压制、对远炮检距多次波不予压制的交互减去法压制多次波技术并将这一技术应用到实际地震资料处理中,取得了很好的应用效果,既对多次波给予了有效压制,又使一次波、断面波等有用信号得到保护并最终成像,同时地震资料的品质大大改善.图8参11
북부만분지복산요함화성암분포엄범,여천표층위암형성흔강적종파화횡파파조항계면,대유효지진파적하전여상반형성료흔강적병폐,치사래자심부적반사신식능량대폭쇠감,엄중영향료해구지진자료품질,인차화성암다차파간우시해지구지진자료처리소면림적수요난제.통과분석연구화성암분포특정、화성암여다차파지간적관계,재파동방정모형정연이론지도하,탐색압제다차파간우적처리기술여방법,제출료대근포검거다차파압제、대원포검거다차파불여압제적교호감거법압제다차파기술병장저일기술응용도실제지진자료처리중,취득료흔호적응용효과,기대다차파급여료유효압제,우사일차파、단면파등유용신호득도보호병최종성상,동시지진자료적품질대대개선.도8삼11
Volcanic rocks are widely developed in the Fushan Sag in Beibuwan Basin,and they create strong impedance interfaces with the shallow surrounding rocks,forming shields for seismic signals thus causing the attenuation of reflection energy at depth and affecting the quality of seismic data badly.So,multiples with volcanic are the prime problem of the seismic data processing in the area.By studying the developing features of the volcanics and the relationships between the volcanics and the multiples,and using the theories of the wave equations,we provide the technique of interactive subtraction multiple elimination,The feature of this technique is to eliminate the near offset multiples,and not to eliminate far offset multiples,which are eliminated by multiple stacking.The interactive subtraction multiple elimination technique has been used to process seismic data.Results show that it can eliminate multiples,protect useful signals and image,as well as improve the seismic data quality.