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3D Reverse-Time Migration Imaging for Multiple Cross-Hole Research and Multiple Sensor Settings of Cross-Hole Seismic
Fei Cheng1, Daicheng Peng2, Sansheng Yang3
1Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan 430074, China.
Sensors (Basel, Switzerland)
|February 10, 2024
Summary
This study introduces a 3D cross-hole acoustic wave reverse-time migration imaging method for enhanced geological exploration. It overcomes 2D limitations, providing more accurate 3D underground structure data for seismic surveys.
Area of Science:
- Geophysics
- Seismic Imaging
- Exploration Geology
Background:
- Two-dimensional (2D) cross-hole seismic computed tomography (CT) offers optimal target zone characterization but is limited to 2D velocity profiling.
- Existing 2D methods cannot capture 3D geological structures outside the profile, leading to distorted imaging and interpretation due to out-of-profile geological bodies.
- Cross-hole seismic exploration data are influenced by 3D geological bodies, impacting the accuracy of subsurface imaging.
Purpose of the Study:
- To propose and validate a novel 3D cross-hole acoustic wave reverse-time migration imaging method.
- To address the limitations of 2D cross-hole seismic methods in capturing comprehensive 3D geological information.
- To optimize sensor settings for cost-efficient 3D underground structure distribution obtainment.
Main Methods:
- Development of a 3D cross-hole acoustic wave reverse-time migration imaging technique.
- Utilizing multi-cross-hole seismic research sensor settings for data acquisition.
- Conducting numerical simulations on four distinct geological models (layers, high-velocity zones, large dip angles, faults).
Main Results:
- The proposed 3D method successfully captures 3D cross-hole geological structures.
- Analysis of 3D images under varying sensor settings indicates that optimizing the observation system improves cost-efficiency.
- Numerical simulations confirmed the method's superiority in providing reliable and accurate 3D geological information.
Conclusions:
- The 3D cross-hole acoustic wave reverse-time migration imaging method significantly enhances the accuracy and reliability of subsurface geological information.
- Optimizing the observation system is crucial for cost-effective 3D underground structure imaging.
- This research provides a theoretical foundation for improved processing and interpretation of cross-hole seismic data.
