基于非平稳褶积模型的泊松阻抗及裂缝参数叠前地震各向异性高分辨率直接反演方法

doi:10.11720/wtyht.2025.1432

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Abstract

Since no targeted seismic inversion techniques are available for the prediction of complex sandstone-mudstone reservoirs, conventional inversion methods struggle to provide accurate sand body predictions in the presence of sandstone-mudstone interbeds or horizontal fractures. Hence, this study selected Poisson's impedance as the sensitive parameter for reservoir prediction based on the petrophysical parameter cross plots using log data from the study area. Considering the characteristics of fracture development in the reservoirs, this study derived the equation of anisotropic reflection coefficients in vertical transverse isotropy (VTI) media, incorporating Poisson's impedance. Furthermore, this study designed a forward modeling operator using a non-stationary convolution model to improve the strong attenuation characteristics of seismic waves generated by sandstone-mudstone interbeds and protect the reflection characteristics of deep thin reservoirs. Finally, this study proposed a high-resolution direct inversion of Poisson's impedance and fracture parameters using prestack seismic anisotropy data, providing a novel approach for high-resolution characterization of the distribution of sandstone-mudstone reservoirs and the assessment of fracture-bearing properties. Both model and field data tests validate the feasibility and adaptability of the proposed method.

Key words： Poisson's impedance fracture parameter direct inversion non-stationary anisotropy reservoir prediction

Received: 30 October 2024 Published: 22 July 2025

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	Articles by authors
	Shu WANG
	Rui WANG
	Jia-Yi YANG
	Wei-Sheng ZHAO
	Jian LIAO

Cite this article:

Shu WANG,Rui WANG,Jia-Yi YANG, et al. High-resolution direct inversion of Poisson's impedance and fracture parameters using prestack seismic anisotropy data based on the non-stationary convolution model[J]. Geophysical and Geochemical Exploration, 2025, 49(3): 642-652.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.1432 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I3/642

Petrophysical cross plots of sandstone sensitive parameter logging in complex sand and mudstone sedimentary area

The parameters of sand and mudstone reservoir two-layer model

The precision analysis of reflection coefficient equations

The petrophysical models

The forward synthesized seismogram based on non-stationary convolution model with different signal-to-noise ratios

The pre-stack seismic inversion results of the synthesized seismogram with different signal-to-noise ratios

Comparison of absolute error between inversion results and actual models with different parameters

Post stack well-cross seismic profile of actual working area

High resolution direct inversion results of non-stationary pre-stack anisotropy method in actual data

Direct inversion results of conventional prestack anisotropy method in actual data

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