【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。更多还原

【Abstract】 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.更多还原