摘要
本文基于基追踪理论利用叠前地震反演方法直接反演杨氏模量和泊松比。首先从Zoeppritz方程的Gray近似公式出发,根据弹性参数间的关系推导出包含杨氏模量、泊松比和密度的地震反射系数线性近似公式;然后基于基追踪反演理论建立了叠前地震反演方法,直接反演杨氏模量和泊松比,并在基追踪反演的目标函数中加入模型约束项,以提高反演方法的稳定性;最后,利用模型试验和实际数据证明该方法可以从地震数据中稳定估算杨氏模量和泊松比。
Based on the basis pursuit theory,this paper develops an approach to directly invert Young’s modulus and Poisson’s ratio with the prestack seismic data.First based on the approximate equation of Zoeppritz equation and the relationship between elastic parameters,a linear approximate equation of seismic reflection coefficient is derived,which contains Young’s modulus,Poisson’s ratio,and density.Thereafter,Young’s modulus and Poisson’s ratio are directly inverted with the prestack seismic data based on the basis pursuit.In order to improve the stability,model constraints are added to objective functions of the basis pursuit inversion.Both model tests and real data applications show that the proposed approach can stably estimate Young’s modulus and Poisson’s ratio from seismic data.
作者
刘畅
李超
朱振宇
陈国俊
LIU Chang;LI Chao;ZHU Zhenyu;CHEN Guojun(Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou,Gansu 730000,China;China United Coalbed Methane Corporation Ltd.,Beijing 100011,China;Unconventional Oil Gas Branch,CNOOC,Beijing 100011,China;University of Chinese Academy of Sciences,Beijing 100049,China;Research Institute,CNOOC,Beijing 100028,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2019年第6期1310-1315,I0011,共7页
Oil Geophysical Prospecting
基金
国家科技重大专项“南海北部深水区关键成藏期优质储层形成机理及预测技术”(2016ZX05026-007-05)资助
关键词
杨氏模量
泊松比
叠前反演
基追踪
Young’s modulus
Poisson ratio
prestack inversion
basis pursuit
