宋建国^1,2,,
郭毓¹,
冉然¹
1. 中国石油大学(华东)地球科学与技术学院, 山东青岛 266580
2. 海洋国家实验室海洋矿产资源评价与探测技术功能实验室, 山东青岛 266071

基金项目: 国家自然科学基金项目（41674125），国家自然科学基金委员会-中国石油化工股份有限公司石油化工联合基金项目（U1663207），国家十三五重大专项（2017ZX05049002）和国家重点基础研究发展计划项目（973计划项目）（2014CB239104）联合资助


详细信息

作者简介: 宋建国, 男, 1971年生, 副教授, 硕士生导师, 1993年毕业于中国石油大学(华东)物探专业, 获学士学位, 分别于1996年、1999年获中国石油大学(华东)应用地球物理专业硕士和博士学位, 现在中国石油大学(华东)地球科学与技术学院从事地震资料高分辨率处理与解释理论、方法研究和教学工作.E-mail:jianguosong@163.com

中图分类号: P631

收稿日期:2017-01-05
修回日期:2018-03-15
上线日期:2018-04-05

Pre-stack inversion method of Young's modulus based on the root mean square ratio

SONG JianGuo^1,2,,
GUO Yu¹,
RAN Ran¹
1. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China
2. Laboratory of Marin Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Shandong Qingdao 266071, China


MSC: P631

--> Received Date: 05 January 2017
Revised Date: 15 March 2018
Available Online: 05 April 2018


摘要
摘要:杨氏模量和泊松比是表征岩石脆性、评价储层可压性以及描述储层流体特征的重要参数，叠前地震反演是从地震数据中得到此类参数的有效手段.常规的叠前地震反演方法多使用Zeopppritz方程的近似式计算反射系数，近似式的误差影响了反演结果的精度.针对这个问题，推导了比值均方根形式的杨氏模量、泊松比和密度的Zoeppritz方程，并基于广义线性反演构建了杨氏模量和泊松比直接反演方法，有效地避免了使用近似式的局限性，提高了反演的精度.模型测试和实际资料试算结果表明：采用比值均方根形式构建的反演流程稳定，能够从叠前地震数据中获得可信的杨氏模量、泊松比和密度，提供了一种可靠的杨氏模量和泊松比直接反演方法.
关键词: 杨氏模量/
泊松比/
密度/
叠前反演/
Zoeppritz方程

Abstract:Young's modulus and Poisson's ratio are two important rock parameters to characterize reservoir properties. Pre-stack seismic inversion is an effective tool to deterime such parameters from seismic data. Conventional seismic pre-stack inversion methods are mostly based on approximate expressions of the Zoeppritz equation. The error caused by this approximation would affect the accuracy of inversion results. To address this issue, we deduce the Zoeppritz equation in the form of the root mean square ratio of Young's modulus, Poisson's ratio and density. With this equation we develop the direct inversion method for Young' modulus based on a generalized linear inversion algorithm, effectively avoiding the limitation of approximate equation and enhancing the accuracy of inversion. Tests on a model and real data show that this inversion method based on the root mean square ratios is able to obtain credible Young's modulus, Poisson's ratio and density from pre-stack seismic data, which offers a reasonable direct inversion method for Young's modulus and Poisson's ratio.
Key words:Young's modulus/
Poisson's ratio/
Density/
Pre-stack inversion/
Zoeppritz equation



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