OBN seismic data PP- and PS-waves joint inversion and reservoir characterization

作者：Lihua Fang, Shiyou Liu, Rui Wang, Y. Tang, Shuangquan Chen · 发表于：Frontiers in Earth Science · 年份：2025 · DOI：10.3389/feart.2025.1651562 · 被引用次数：2 · 研究领域：Seismic Imaging and Inversion Techniques、Drilling and Well Engineering、Hydraulic Fracturing and Reservoir Analysis

The use of seismic exploration data to invert shear (S-) wave information plays a very important role in oil and gas exploration, especially in reservoir prediction with increasingly complex lithology and deeper target layers. Combining longitudinal (P-) and S-waves information can help us better describe reservoirs. In theory, to obtain accurate shear wave information through inversion, we will need shear or converted wave (PS-wave) data to be used in a joint inversion. The propagation of S-wave in underground media is different from that of P-wave, as S-wave are mainly influenced by the rock skeleton and less affected by pore fluids. As a result, we propose a joint prestack seismic inversion method for PP- and PS-waves data based on L 1-2 -norm constraints. Firstly, a joint coefficient matrix is constructed using linear approximation equations for the reflection coefficients of PP- and PS-wave. Next, the L 1-2 -norm constraint is introduced to construct the inversion objective function, and a two-steps iterative strategy is applied for optimization, achieving a three-parameter prestack inversion. In the synthetic data testing, different models are used for inversion comparison. The synthetic data inversion results show that compared with traditional norm constrained methods or PP-wave inversion alone, the proposed joint inversion method can invert results with higher correlation coefficients and lower errors, confirming the accuracy and stability of the proposed method. Fin...