Application of OVT Domain Processing Technology in 3D Seismic Exploration of Coalbed Methane in Heshun Hengling Block

Zhicheng Yao

doi:10.62051/ijnres.v3n3.08

Authors

Zhicheng Yao

DOI:

https://doi.org/10.62051/ijnres.v3n3.08

Keywords:

Offset Vector Tile; Seismic Exploration; Data Processing; Azimuthal Anisotropy Correction.

Abstract

This study introduces the OVT (Offset Vector Tile) domain processing technology to improve the accuracy of small structure detection in 3D seismic exploration of coalbed methane in the Heshun-Hengling block in China. The OVT technology optimizes wide azimuth seismic data processing through steps such as facet division, five-dimensional regularization, pre-stack time migration, and azimuthal anisotropy correction. The results show that OVT processing retains azimuth information, enhancing the ability to reflect stratum changes with azimuth; azimuthal anisotropy correction improves the resolution of the profile. The profile after OVT processing has a natural waveform, good continuity of the phase axis, and a wide frequency band, meeting the requirements of the “Coalbed Methane Seismic Exploration Specification”. It demonstrates the advantages of OVT technology in imaging complex geological structures, providing a new perspective for seismic exploration.

References

[1] Cai, W. R. Application of OVT domain pre-stack time offset in high-density 3D seismic exploration of coal fields[J]. Energy and Environmental Protection,2021,43(10): 142-148. DOI:10.19389/j.cnki.1003-0506.2021.10.025.

[2] Dong Ruijing. Application of OVT domain dominant channel set in fine detection of seismic anomaly structure in coal field[J]. China Coal Geology,2023,35(12):68-71+46.

[3] QIAO HUI, LUO RENZHI, HUANG HEFEI, et al.Application of OVT domain processing technology in 3D seismic exploration of loess plateau coalfields[J]. Shaanxi Coal,2022, 41(04): 72-76+94.

[4] Cai, W. R. The application of five-dimensional regularisation of OVT domains in high-density data processing in coalfields[J]. Coal Technology,2021,40(12): 86-90. DOI:10.13301/j.cnki.ct.2021.12.021.

[5] YIN Xingyao, ZHANG Hongxue, ZONG Zhaoyun. Research status and progress of five-dimensional seismic data interpretation technology in OVT data domain[J]. Petroleum Physical Exploration, 2018, 57(02): 155-178.

[6] GONG Mingping, ZHANG Junhua, WANG Yanguang, et al. Current status and progress of research on subazimuthal seismic exploration[J]. Petroleum Geophysical Exploration, 2018, 53(03): 642-658+8. DOI:10.13810/j.cnki.issn.1000-7210.2018.03.025.

[7] Zhan Shifan, Chen Maoshan, Li Lei, et al. A method for analysing seismic attributes of wide-azimuth pre-stack seismic attributes in OVT domain[J]. Petroleum Geophysical Exploration, 2015, 50(05): 956-966+806. DOI:10.13810/j.cnki.issn.1000-7210.2015.05.020.

[8] ZHOU Lu, ZHOU Jianghui, Dai Ruixue, et al. Application of five-dimensional seismic attributes in OVT domain in fracture prediction of Qixia Formation in the Shuangyuishi area[J]. Geological Frontiers, 2023, 30(01): 213-228. DOI:10.13745/j.esf.sf.2022.8.37.

[9] LI Ang, ZHANG Liyan, YANG Jianguo, et al. Wide-azimuth seismic OVT domain azimuthal anisotropy correction technique[J]. Petroleum Geophysical Exploration, 2021, 56(01): 62-68+6. DOI:10.13810/j.cnki.issn.1000-7210.2021.01.007.

[10] LI Juan, TIAN Zhongbin, SHEN Youyi, et al. Application of OVT-domain pre-stack fracture prediction technology in coalbed methane exploration in Qinshui Basin[J]. China Coal Geology, 2021, 33(09):67-72.

[11] Lu Y, Cao J, Liu Z, et al. Adaptive fault enhancement in OVT domain based on anisotropy theory[J]. Journal of Applied Geophysics, 2024, 223105347-.

[12] Zeng H, Su Q, Meng H, et al. Wide azimuth seismic data processing technology and application: a case study of tight gas reservoirs in western China[J]. Frontiers in Earth Science, 2023, 11

[13] Liu G. Special Issue on Technological Advances in Seismic Data Processing and Imaging[J].Applied Sciences, 2023, 13(21):

[14] Leonid K, Alexander K, Elena R, et al. Enhancing confidence in fracture prediction through advanced seismic data processing and analysis techniques[J]. First Break, 2017, 35(2149)

[15] Liu B. Applying an Adaptive Principal-Component Extraction Algorithm in Seismic Data Processing[J]. Journal of Environmental and Engineering Geophysics, 2016, 21(3)