摘要
地震波速度对地震资料偏移成像、岩性和岩相解释以及储层预测,均起着非常重要的作用.在储层预测中,需要获得横波层速度信息,以减少仅用纵波速度在区分岩性和孔隙中流体类型以及含气饱和度方面的不确定性.基于Zoeppritz方程组,提出了数值求解和速度扫描方法,对叠前转换波资料求取横波层速度.理论模型和实际转换波资料的反演结果,均表明该方法的效果较好.
Seismic velocity is important to migration of seismic data, interpretation of lithology and lithofacies as well as prediction of reservoir. The information of shear wave velocity is required to reduce the uncertainty for discriminating lithology, identifying fluid type in porous material and calculating gas saturation in reservoir prediction. Based on Zoeppritz equations, a numeral and scanning method was proposed in this paper. Shear wave velocity can be calculated with prestack converted wave data. The effects were demonstrated by inversion of theoretical and real seismic data.
出处
《地震学报》
CSCD
北大核心
2007年第2期173-180,共8页
Acta Seismologica Sinica
基金
国家重点基础研究发展(973)项目(2005CB422104)
中国石油化工股份有限公司科技开发项目(P05063)联合资助.
关键词
转换波
叠前反演
横波速度
converted wave
prestack inversion
shear-wave velocity
