3D AVO analysis for identifying thin continental sandstone interbeds and deep volcanic rocks

Fu, Lei; Wang, Jianmin; Cui, Fenglin; Xu, Jianjun; Zhang, Xiangjun; Kong, Xiangbo

doi:10.1007/s11770-005-0006-8

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…It is a common reservoir prediction method to determine thickness and physical properties in practical seismic interpretation using seismic attributes (Ling, 2004;Fu et al, 2005). The statistical relation between seismic attributes and reservoir properties is established by the multivariate statistical regression analysis method.…”

Section: Introductionmentioning

confidence: 99%

Seismic reflection characteristics of fluvial sand and shale interbedded layers

Xiong²,

Zhou

et al. 2008

Appl. Geophys.

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A sedimentary geological model is established in order to study the seismic refl ection characteristics of channel sand bodies. Synthetic seismic shot gathers are simulated using the acoustic wave equation and then are prestack time migrated. On the imaged data, the refl ection characteristics and instantaneous attributes are analyzed and log-constrained impedance inversion is tested. Because of wave fi eld interference, the experimental results show that seismic events do not defi nitely correspond to the channel sand bodies and that seismic modes of occurrence do not represent the actual ones. The seismic events formed by wave interference may lead to errors and pitfalls in sand body interpretation. The corresponding relations between instantaneous seismic attributes and sedimentary sands are not well established. Log-constrained impedance inversion improves the resolution of channel sands. However, if the inverted resolution is forced to be too high, artifacts related to the initial model may occur.

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Section: Introductionmentioning

confidence: 99%

Seismic reflection characteristics of fluvial sand and shale interbedded layers

Xiong²,

Zhou

et al. 2008

Appl. Geophys.

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Improving seismic interpretation: a high-contrast approximation to the reflection coefficient of a plane longitudinal wave

Yin

Zong

2013

Pet. Sci.

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amplitude versus offset (AVO) analysis and inversion in exploration geophysics. However, the weak properties contrast hypothesis of those linearized approximate equations leads to big errors when the two media across the interface vary dramatically. To extend the application of AVO analysis and inversion to high contrast between the properties of the two layers, we derive a novel nonlinearized high-contrast (A PP wave is a reflected compressional wave from an incident compressional wave (P-wave).) This novel approximation is derived from the exact reflection coefficient equation with Taylor expansion for the incident angle. Model tests demonstrate that, compared with the reflection coefficients of the linearized approximations, the reflection coefficients of the novel nonlinearized approximate equation agree with those of the exact PP equation better for a high contrast interface with a moderate incident angle. Furthermore, we introduce a nonlinear direct inversion method utilizing the novel reflection P-wave velocities, S-wave velocities, and densities in the upper and lower layers across the interface. This nonlinear inversion algorithm is able to estimate the inverse of the nonlinear function in terms of model and suitability of this novel approximation for a high contrast interface, and we still could estimate the six parameters across the interface reasonably when the parameters in both media across the interface vary

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3D AVO analysis for identifying thin continental sandstone interbeds and deep volcanic rocks

Cited by 2 publications

References 4 publications

Seismic reflection characteristics of fluvial sand and shale interbedded layers

Seismic reflection characteristics of fluvial sand and shale interbedded layers

Improving seismic interpretation: a high-contrast approximation to the reflection coefficient of a plane longitudinal wave

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