Application of Scholte Wave Inversion Modeling Method for Marine OBN Multi-component Oil and Gas Exploration
Zhang Hua,*, Wang Guang-yin, Zhang Jian-lei, Chen Hai-feng
1. Geophysical Exploration Technology Research Center of BGPInc., China National Petroleum Corporation, He Bei 072751
2. National Engineering Research Center of Oil&Gas Exploration Computer Software, Bei Jing, 100080
Abstract：
In multi-component oil and gas exploration using ocean bottom nodes, converted wave data is rich in lithological and fracture information. One of the urgent problems to be solved is how to construct an accurate shear wave velocity model of the shallow sea bottom by leveraging the seismic wave information at the fluid-solid interface in the ocean, and improve the lateral resolution of marine converted wave data. Given that the dispersion characteristics of surface waves are sensitive to the S-wave velocity of subsurface media, and that Scholte surface waves, which propagate at the interface between liquid and solid media, exist in the data of marine oil and gas exploration, this paper proposes a Scholte wave inversion and modeling method based on oil and gas exploration using ocean bottom nodes. By using the method for calculating the Scholte wave dispersion spectrum based on the Bessel kernel function, the accuracy of dispersion spectrum analysis is improved, and more accurate dispersion curves are picked up. Through the adaptive weighted least squares Scholte wave dispersion inversion algorithm, the Scholte wave dispersion equation for liquid-solid media is solved, and the shear wave velocity model of the shallow sea bottom is calculated. Theoretical tests and applications of realdata have proven that this method can significantly improve the lateral resolution of converted wave data, provide high-quality data for subsequent inversion of marine multi-component oil and gas exploration data and reservoir reflection information, and contribute to the development of marine oil and gas exploration technology.
基金资助:This work was financially supported by the Scientific Research and Technology Development Project of China National Petroleum Corporation (No. 2021ZG02) titled "Development of Seismic Data Processing Software for Ocean Nodes (OBN)".
作者简介: Zhang Hua, a senior engineer, obtained a master's degree in the earth exploration and information technology from China University of Petroleum (Huadong) in 2008. In 2018, he received a doctoral degreeinear the xploration and information technology from Chengdu University of Technology. Currently, he is employed at the Geophysical Exploration Technology Research Center of BGP Inc. of CNPC, and is dedicated to research in areas such as the separation of signal and noise in seismic data, surface wave inversion modeling, wavefi eld separation of blend data, and high-resolution seismic data processing.
2025, Vol. 22 
