Key technologies to improve post-stack seismic inversion accuracy

doi:10.3969/j.issn.1006-6535.2025.03.007

Abstract

Abstract: To address the issues of low resolution, suboptimal continuity and limited reliability in conventional post-stack seismic inversion processes,this study systematically analyzes the importance of each inversion step from the perspective of the inversion workflow. By employing various methods and techniques, the resolution, continuity, and authenticity of the inversion results are improved, and a new high-accuracy post-stack seismic inversion workflow is established. The study shows that improving the vertical resolution of inversion results can be achieved through four methods: high-resolution inversion techniques, resolution-enhancing preprocessing of seismic data, wavelet adjustment, and high-frequency merging of inversion results with models. Improving the lateral continuity of the inversion results can be achieved through two methods: inversion stability adjustment and low-frequency merging of inversion results with models. The enhancement of inversion effectiveness must adhere to the authentic characteristics of reservoirs and should be achieved under the constraints of well-cross-section validation, planar validation, inversion residual validation, and well-point validation. Additionally, four key applicability considerations for the new inversion workflow are proposed: improvement methods should be selected based on the geological context and specific prediction objectives; it is challenging for inversion results to simultaneously meet the requirements of vertical resolution and lateral continuity, necessitating a trade-off between the two; excessive enhancement of inversion effectiveness may compromise the reliability of the results; and the time-depth relationship of wells must be ensured to be accurate. Future reservoir predictions will become more refined and complex, and the aforementioned methods and techniques may have promising applications, potentially serving as a reference for detailed inversions in other regions.

Key words: post-stack seismic inversion, accuracy enhancement, validation methods, vertical resolution, lateral continuity, applicability

CLC Number:

P631

ZHANG Xichen, ZHANG Jianwei, LUO Ya′neng, LI Jingye, GU Xiaodong, FU Hui, WANG Zixin, DING Yan. Key technologies to improve post-stack seismic inversion accuracy[J]. Special Oil & Gas Reservoirs, 2025, 32(3): 57-65.

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