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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摘要

目前利用地震反演方法对复杂砂、泥岩储层的预测缺乏有针对性的研究,在砂、泥岩互层或存在水平裂缝发育的情况下,常规的反演方法难以给出准确的砂体预测结果。为此,结合实际工区的测井岩石物理交会,优选了泊松阻抗作为储层预测的敏感参数,同时考虑储层存在裂缝发育的特征,推导了含泊松阻抗的VTI各向异性反射系数方程。在此基础上,采用非平稳褶积模型设计了正演算子改善砂、泥岩互层产生的地震波强衰减特性,保护深层薄储层的反射特征,提出了一种叠前地震各向异性高分辨率直接反演泊松阻抗及裂缝参数的方法,为砂、泥岩储层高分辨率展布、刻画以及含裂缝性评价开辟了新的思路。模型测试与实际资料测试结果证明了本方法的可行性和适应性。

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	汪舒
	王锐
	杨家义
	赵卫升
	廖建

关键词 ：泊松阻抗, 裂缝参数, 直接反演, 非平稳, 各向异性, 储层预测

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

收稿日期: 2024-10-30 修回日期: 2024-12-27 出版日期: 2025-06-20

ZTFLH:

P631.4

基金资助:中国石油天然气股份有限公司重大专项“超深层油气藏开发关键技术研究与应用”(2023ZZ14YJ03)

通讯作者: 廖建(1997-),男,主要从事开发地质方面的研究工作。Email:1061347029@qq.com

作者简介: 汪舒(1994-),男,硕士学位,工程师,从事开发地质方面的研究工作。Email:wangshu-txn@petrochina.com.cn

引用本文:

汪舒, 王锐, 杨家义, 赵卫升, 廖建. 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[J]. 物探与化探, 2025, 49(3): 642-652.
WANG Shu, WANG Rui, YANG Jia-Yi, ZHAO Wei-Sheng, LIAO Jian. High-resolution direct inversion of Poisson's impedance and fracture parameters using prestack seismic anisotropy data based on the non-stationary convolution model. Geophysical and Geochemical Exploration, 2025, 49(3): 642-652.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2025.1432 或 https://www.wutanyuhuatan.com/CN/Y2025/V49/I3/642

Fig.1 复杂砂、泥岩沉积区砂岩敏感参数测井岩石物理交会图

Table 1 砂、泥岩储层双层模型参数

Fig.2 反射系数方程精度分析

Fig.3 岩石物理参数模型

Fig.4 不同信噪比下基于非平稳褶积模型的正演合成地震记录

Fig.5-1 不同信噪比合成地震记录的叠前地震反演结果

Fig.5-2 不同信噪比合成地震记录的叠前地震反演结果

Fig.6 不同参数的反演结果与真实模型的误差绝对值对比

Fig.7 实际工区叠后过井地震剖面

Fig.8 实际资料非平稳叠前各向异性高分辨率直接反演结果

Fig.9 实际资料常规叠前各向异性直接反演结果

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