The Design Method of Cross-well Seismic Geometry Driven by Reverse Time Migration
Cao Xiao-yong, Yang Fei-long,*, Hui Wei-jing, Ruan Shao-hua, Yu Dai, Fang Wen-zhen, Guo Xin-yue
1. Gansu Coal Geology Bureau Comprehensive Survey Team, Tianshui 741000, China
2. School of Earth Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China
3. Optical Science and Technology (Chengdu) Ltd., Chengdu 610041, China
Abstract：
Reasonable field acquisition geometry can not only guide seismic exploration to obtain suffi cient geological information of target body, but also reduce acquisition cost to the maximum. In this study, building on conventional ray-based geometry design methods, we incorporate imaging results as a constraint to optimize the geometry design and evaluate its effectiveness. Firstly, the geological model of the target layer is established based on the geological data of the study area and surface seismic data combined with exploration tasks. Then, the ray-tracing method is employed to simulate and assess the proposed geometry design, verifying whether its parameters meet the exploration requirements. Finally, the imaging effect of the designed geometry on the target layer is tested by the cross-well seismic reverse time migration method. This methodology was applied to design the cross-well seismic acquisition geometry for offshore deviated wells in the X Oilfi eld. The simulation results demonstrate that the imaging-driven geometry design approach effectively guides fi eld operations, enhances the imaging quality of the target layer, and reduces acquisition costs.
基金资助:This research work is funded by the Young Scientists Fund of the National Natural Science Foundation of China (42304135) and the scientifi c research project of Gansu Coal Geology Bureau (2023-07).
2025, Vol. 22 
