纵波和转换波联合反演技术在松辽盆地北部LMD地区的应用  

Application of P-wave and PS-wave jointed inversion in LMD area of northern Songliao Basin

作　　者：付雷[1] 王建民[1] 许红[2] 田晓冬[1] 陈少峰[1] 

机构地区：[1]中国石油天然气集团公司大庆钻探工程公司地球物理勘探一公司,黑龙江大庆163357 [2]中国石油天然气股份有限公司大庆油田有限责任公司采气分公司,黑龙江大庆163357

出　　处：《石油物探》2009年第6期563-567,共5页Geophysical Prospecting For Petroleum

摘　　要：常规纵波反演技术基于纵波地震资料,反演结果具有多解性。纵波和转换波联合反演技术基于纵波和转换波地震资料,由于增加了转换波地震资料这一约束条件,大大降低了反演结果的多解性,从而提高了储层预测的精度。纵波和转换波联合反演方法的基本原理是,通过建立纵波和转换波的反射系数线性方程,基于三维三分量地震资料,计算地层的纵波阻抗、横波阻抗和密度的反射率。首先基于正演模型,讨论了反演方法的精度;然后基于松辽盆地北部LMD地区的三维三分量地震资料,针对某气顶型油藏进行了反演,反演结果与实际地质特征吻合。Conventional P-wave inversion is based on PP-wave seismic data,maybe have multi solutions.P-wave and PS-wave jointed inversion is based on PP-wave and PS-wave seismic data,which largely reduces the multi-solution because of the constraint of PS data, and eventually improves the precision of reservoir prediction.The basic principles of P-wave and PS-wave jointed inversion is,by building reflectivity linear equation of P-wave and S-wave,P-wave impedance,S-wave impedance and density reflectance can be computed based on 3D3C data.Firstly,the precision of inversion is discussed based on the forward modeling.Then,the jointed inversion is carried out on the gas-cap reservoir based on 3D3C seismic data in LMD area of northern Songliao Basin.The inversion result is consistent with the reservoir geologic characteristics.

关 键 词：多波多分量 转换波 联合反演 时间校正 反射率 

分 类 号：P631.4[天文地球—地质矿产勘探]