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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
石油物探
2009年 48卷 第No. 6期
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Title
Application of P-wave and PS-wave jointed inversion in LMD area of northern Songliao Basin
单位
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
Organization
Geophysical Exploration Branch of Daqing Drilling & Exploration Engineering Company,CNPC,Daqing 163357,China
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。
Abstract
Application of P-wave and PS-wave jointed inversion in LMD area of northern Songliao Basin, Fu Lei,Wang Jianmin,Xu Hong,Tian Xiaodong,Chen Shaofeng.GPP,2009,48(6):563~567
Conventional P-wave inversion is based on PP-wave seismic data,maybe have multi solutions.P-wave and PSwave 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 Pwave and PSwave jointed inversion is,by building reflectivity linear equation of Pwave 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 gascap 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;
Keywords:
multiwave &
multicomponent;
PS-wave;
jointed inversion;
time calibration;
reflectivity;
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