Processing/integration of simultaneously acquired 3D surface seismic and 3D VSP data

Chopra, Satinder; Alexeev, Vladimir; Manerikar, Abhi; Kryzan, Andrew

doi:10.1190/1.1729227

Cited by 10 publications

(3 citation statements)

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“…The estimate of the absorption coefficient or factor Q using seismic data reveals useful information, such as: lithology, degree of saturation of the rock and presence of fluids in the pores, porosity, permeability (Carcione & Picotti, 2006;Picotti et al, 2007), and indicate porosity and saturation heterogeneity as the most severe mechanism of decaying amplitude. That justifies the importance of incorporating the attenuation effects in the evaluation of reflection coefficients to improve the resolution of images and minimize the impact on the amplitude variation offset (AVO), which substantially affects the post-critical reflections (Chopra et al, 2004).…”

Section: Methodsmentioning

confidence: 99%

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Q Factor Estimation From Surface and VSP Seismic Data: A Numerical Modeling Study

Silva¹,

Misságia²,

Ceia³

2013

Rev. Bras. Geof.

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ABSTRACT. Seismic acquisition is used by the petroleum industry to identify subsurface structures that meet pre-established requirements for hydrocarbon accumulation. In mature fields, such surveys are important to monitor the reserves, the producing wells and to aid the development of projects for new wells location. This work proposes a processing workflow that seeks to improve the high frequency content of the seismic signal, which is the most attenuated part of the frequency spectrum of such kind of signal, especially in surface seismic data. The method is based on the calculation of Q factor from VSP data which allows defining an inverse Q ef filter to be applied in surface seismic data. This processing flow was tested in two datasets derived from numerical models: one with plain-parallel layers and another representing the wedge type reservoir. Such numerical modeling aimed to simulate the attenuation of the seismic signal concerning the geometry and saturation effects in those two reservoir models, which allows testing the efficiency of the inverse Q ef filter that was designed to mitigate energy loss effects in seismic waves used for reservoir characterization.Keywords: attenuation coefficient, quality factor, seismic characterization, petroleum reservoir. RESUMO.A aquisição sísmicaé utilizada pela indústria do petróleo com a finalidade de identificar em subsuperfície estruturas que satisfaçam os requisitos pré-estabelecidos para acumulação de hidrocarbonetos. Em campos maduros, tais levantamentos são importantes para monitorar reservas, poços produtores e desenvolver novos projetos de poço. Nesse artigo propõe-se um fluxo de processamento voltado para o melhoramento das altas frequências atenuadas nos dados sísmicos de superfície. Isto será feito a partir do cálculo do fator Q utilizando dados sísmicos de poço para definir um filtro inverso Q ef e realizar a filtragem de dados sísmicos de superfície. Este fluxo foi testado em dois conjuntos de dados provenientes de simulações numéricas: com camadas planas e paralelas, e outro com camadas inclinadas simulando a borda acunhada (wedge) de um reservatório delgado. A modelagem numérica teve como propósito simular a atenuação do sinal sísmico associado aos efeitos da geometria e saturação nos dois tipos de reservatórios, possibilitando testar a eficácia do filtro inverso Q ef proposto para mitigar os efeitos da perda de energia da onda sísmica na caracterização de reservatórios de hidrocarbonetos.

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Section: Methodsmentioning

confidence: 99%

“…It can restore the high frequency range of seismic reflection data aiming at improving the resolution of seismic data (Raji & Rietbrock, 2011), identifying important attributes and interpreting small-scale seismic stratigraphic features (Chopra et al, 2004) and work as a direct indicator of hydrocarbons (Castagna et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Q Factor Estimation From Surface and VSP Seismic Data: A Numerical Modeling Study

Silva¹,

Misságia²,

Ceia³

2013

Rev. Bras. Geof.

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show abstract

“…Blias (2005) proposed the wave-by-wave approach for VSP wavefield separation, in which events are stripped from the data one at a time. Chopra et al (2004) realized the separation of wavefields by using the differences in apparent velocity and frequency spectrum of waves. Similar to the waveequation methods, these methods require knowledge of the wave velocity to estimate emergence angle.…”

Section: Introductionmentioning

confidence: 99%

The separation of P- and S-wave components from three-component crosswell seismic data

Liu¹,

Zeng²,

Xia³

et al. 2012

Journal of Applied Geophysics

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A new approach to determine geomechanical parameters of Vertical Transverse Isotropic media using VSP data

Gholami

Moradzadeh

Rasouli

et al. 2014

Journal of Applied Geophysics

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Processing/integration of simultaneously acquired 3D surface seismic and 3D VSP data

Cited by 10 publications

References 0 publications

Q Factor Estimation From Surface and VSP Seismic Data: A Numerical Modeling Study

Q Factor Estimation From Surface and VSP Seismic Data: A Numerical Modeling Study

The separation of P- and S-wave components from three-component crosswell seismic data

A new approach to determine geomechanical parameters of Vertical Transverse Isotropic media using VSP data

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