| 基于Fatti近似的弹性阻抗方程及反演 |
| |
| 引用本文： | 王保丽,印兴耀,张繁昌,李爱山.基于Fatti近似的弹性阻抗方程及反演[J].地球物理学进展,2008,23(1):192-197. |
| |
| 作者姓名： | 王保丽 印兴耀 张繁昌 李爱山 |
| |
| 作者单位： | 1. 中国石油大学(华东)地球资源与信息学院,东营,257061
2. 中海石油研究中心国际研究部,北京,100027 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| |
| 摘 要： | 用Connolly的弹性阻抗(EI,elastic impedance)公式进行反演只能直接得到纵、横波速度和密度的信息,然后才可间接计算得到纵横波阻抗等其它的参数数据体,这样便增加了一步误差使数据的准确性降低.本文首先针对该方法的这些缺点和不足,提出了以Zoeppritz方程的Fatti近似为基础一种新的弹性阻抗公式,由该公式可得到比用Fatti近似更准确的反射系数,然后对这个公式进行了标准化以实现不同角度的弹性阻抗间量纲的统一,最后用标准化后的公式进行了反演,从反演得到的不同角度的弹性阻抗数据体中可直接提取得到纵横波阻抗数据体.应用实例表明用这种方法提取得到的纵横波阻抗更加稳定、准确,而且能很好地反映储层信息.这种新的方法是对以Connolly公式为基础的传统方法的改进.
|
| 关 键 词： | Fatti近似 弹性阻抗反演 标准化 岩性参数 |
| 文章编号： | 1004-2903(2008)02-0192-06 |
| 收稿时间： | 2007-2-10 |
| 修稿时间： | 2007年2月10日 |
Elastic impedance equation based on Fatti approximation and inversion |
| |
| WANG Bao-li,YIN Xing-yao,ZHANG Fan-chang,Li Ai-shan.Elastic impedance equation based on Fatti approximation and inversion[J].Progress in Geophysics,2008,23(1):192-197. |
| |
| Authors: | WANG Bao-li YIN Xing-yao ZHANG Fan-chang Li Ai-shan |
| |
| Institution: | (1.DepartmentofGeo-resourcesandInformation,ChinaUniversityofPetroleum(EastChina),DongYing257061,China;2.InternationalResearchDept.CNOOCResearchCenter,Beijing100027,China) |
| |
| Abstract: | Using Connolly's Elastic Impedance equation for inversion,only P-wave velocity,S-wave velocity and Density information can be obtained directly,then other parameters data such as P-Impedance and S-Impedance can be calculated indirectly, so this conventional inversion method increases one step error which reduces accuracy of the data.We propose a new elastic impedance equation based on the Fatti Zoeppritz approximation to address the conventional inversion method's deficiencies,using this new equation can obtain more accurate reflectivity than Fatti approximation.This equation has been normalized to unify the elastic impedance dimensions at different angles and used for inversion.P-and S-Impedance can be extracted directly from the elastic impedance data of different angles obtained from inversion using the linear relation between P-and S-Impedance and elastic impedance.The application example shows that the P-and S-Impedance extracted using this new method are more stable and correct and can recover the reservoir information very well.The new method is an improvement on the conventional method based on Connolly's equation. |
| |
| Keywords: | Fatti approximation elastic impedance inversion normalization lithologic parameter |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学进展》浏览原始摘要信息 |
| 点击此处可从《地球物理学进展》下载免费的PDF全文 |
|
