Three term AVO approximation of Kf-fm-ρ and prestack seismic inversion for deep reservoirs

被引：0
|
作者：
Yin X. [1 ]
Wang H. [1 ,2 ]
Cao D. [1 ]
Zhou Q. [1 ]
Guo S. [3 ]
机构：
[1] School of Geosciences, China University of Petroleum (East China), Qingdao, 266580, Shandong
[2] Institute of Exploration and Development, SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai
[3] Research Institute of Exploration and Development, Dagang Oilfield,PetroChina, Tianjin
来源：
Yin, Xingyao (yinxingyao62@163.com) | 2018年 / Science Press卷 / 53期
关键词：
Deep reservoir; Fluid identification; Three term AVO approximation;
D O I：
10.13810/j.cnki.issn.1000-7210.2018.01.016
中图分类号：
学科分类号：
摘要：
With deeply buried targets,information of large incident angles is deficient.Conventional fluid factors are not sensitive enough to discriminate fluid in reservoirs due to the deep compaction.So a more sensitive fluid indicator aiming at small incident angle is needed to be built for deep reservoir.With the characteristics of rock physics,we derive a new three term AVO approximation in terms of pore-fluid bulk modulus Kf,which is more sensitive to hydrocarbon,dry rock matrix term fm,and density ρ.The accuracy of the new approximation is almost equivalent to exact Zoeppritz equation.Consequently the new approximation can meet the requirements of inversion.In addition,tests on synthetic data show that the pore-fluid bulk modulus Kf can be reliably estimated from the prestack seismic data.We built a flow path of extracting pore-fluid bulk modulus Kf by elastic impedance inversion for deep reservoirs with small incident angles.And the proposed method is proved to be accuracy,reliable and feasible after real data tests. © 2018, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：129 / 135
页数：6
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