Abstract
In crosswell seismic exploration, the imaging section produced by migration based on a wave equation has a serious arc phenomenon at its edge and a small effective range because of geometrical restrictions. Another imaging section produced by the VSP-CDP stack imaging method employed with ray-tracing theory is amplitude-preserved. However, imaging 3D complex lithological structures accurately with this method is difficult. Therefore, this study proposes inverse Gaussian beam stack imaging in the 3D crosswell seismic exploration of deviated wells on the basis of Gaussian beam ray-tracing theory. By employing Gaussian beam ray-tracing theory in 3D crosswell seismic exploration, we analyzed the energy relationship between seismic wave fields and their effective rays. In imaging, the single-channel seismic wave field data in the common shot point gather are converted into multiple effective wave fields in the common reflection point gather by the inverse Gaussian beam. The process produces a large fold number of intensive reflection points. Selected from the horizontal and vertical directions of the 2D measuring line, the wave fields of the effective reflection points in the same stack bin are projected onto the 2D measuring line, chosen according to the distribution characteristics of the reflection points, and stacked into an imaging section. The method is applied to X oilfield to identify the internal structure of the offshore gas cloud area. The results provided positive support for the inverse Gaussian beam stack imaging of 3D complex lithological structures and proved that technology is a powerful imaging tool for 3D crosswell seismic data processing.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Reference
Červený, V., 1983, Synthetic body wave seismograms for laterally varying layered structures by the Gaussian beam method: Geophysical Journal International, 73(2), 389–426.
Červený, V., 1985, Gaussian beam synthetic seismograms: J. Geophys., 58(1-3), 44–72.
Jiang, Z. W., Wu L., 1995, DLCDP method for the stacking and imaging of cross-borehole seismic reflection waves: Oil Geophysical Prospecting, 30(4), 495–504.
Lazaratos, S. K., Rector, J. W., Harris, J. M., and Van Schaack, M., 1993, High-resolution, cross-well reflection imaging: Potential and technical difficulties: Geophysics, 58(9), 1270–1280.
Robert R. S. and Giovanni M., 1991, Cross-well seismic imaging using reflections: SEG Technical Program Expanded Abstracts, 375–378.
Smalley N. and Harris J. M., 1992, CDP stacking and imaging of cross-well reflectors: SEG Technical Program Expanded Abstracts, 87–90.
Song, J. G., 1999, Scanning technology of crosshole seismic migration velocity and ultra stacking of reflection wave: Journal of the University of Petroleum, 23(1), 23–26.
Sun H, Gao C, Zhang Z, et al., 2019, High-resolution anisotropic prestack Kirchhoff dynamic focused beam migration. IEEE Sensors Journal, DOI: 10.1109/JSEN.2019.2933200
Wei, Z. R., Yang, F. L., Li, Q., Liu, X. Y., 2017, 3D XSP-CDP stack imaging of deviated well: Progress in Geophysics, 32(3), 1266–1272.
Wei, Z. R., Yang, F. L., Liu, B. H., Pei, Y. L., 2019, Inverse Gaussian-beam common-reflection-point-stack imaging in crosswell seismic tomography: Applied Geophysics, 16(3), 1–9.
Wyatt K. D., 1981, Synthetic vertical seismic profile: Geophysics, 46(6):880–891.
Yan, Y. S., Yi M. L., Wei X., Wang, W M., 2000, The imaging and interpretation of reflection waves in crosshole seismic data: OGP, 35(1), 36–41.
Yang, F. L., Zhang, X., Luo, H., Zhao, C, Zhao, C., 2019, The inverse Gaussian beam stack imaging in crosswell seismic: Proceedings of Geophysical Technology Seminar, 767–770.
Yang, F. L., Sun, H., 2019, Application of Gaussian beam migration to VSP imaging. Acta Geophys, 1–8.
Yang, F. L., Sun, Y, Lu, J., Ma, D., Jing, Y. Q., Pei, D., 2015, The Gaussian beam stack imaging method of VSP: Geophysical and Geochemical Exploration, 39(3),627-632
Zhang, Z. B., Wang, J. H., Li, X. X., Li, H. F., Fan, T. E., Sun, Y., 2013, A method of XSP-CDP crosswell seismic stack imaging and its trial effect: China Offshore Oil and Gas, 25(01):24–27.
Acknowledgments
We express our deepest gratitude to every member of our research group for their valuable guidance at every research stage. We also thank the reviewers and editors of Applied Geophysics.
Author information
Authors and Affiliations
Corresponding author
Additional information
This research work is funded by the Scientific Research Program of Shaanxi Provincial Education Department (No. 19JK0668) and the Natural Science Basic Research Plan in Shaanxi Province of China (No. 2021JQ-588).
Yang Fei-Long is a lecturer at the School of Earth Sciences and Engineering at Xi’an Shiyou University. He completed his Doctor of Engineering in Geophysical Prospecting from Chang’an University in 2016. His research interests include borehole seismic data processing, seismic wave field modeling, and migration.
Rights and permissions
About this article
Cite this article
Yang, FL., Zhao, C., Wei, ZR. et al. Inverse gaussian beam stack imaging in 3D crosswell seismic exploration of deviated wells and Its application. Appl. Geophys. 17, 629–638 (2020). https://doi.org/10.1007/s11770-019-0830-x
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11770-019-0830-x