A new method for shots and OBSs' relocation applying in three-dimensional seismic survey
文献类型：期刊论文
| 作者 | Yang FuDong2,4; Zhang JiaZheng4; Du Feng1; Wang Qiang2,4; Pang XinMing2,4; Zhao MingHui2,4; Qiu XueLin2,4 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020 |
| 卷号 | 63期号:2页码:766 |
| 关键词 | OBS relocation Shot relocation Quasi-crossline relocation method 3D Seismic velocity structure Error analysis |
| DOI | 10.6038/cjg2020N0150 |
| 英文摘要 | The position correction of shots and OBSs is the basic procedure of three-dimensional (3D) seismic data processing, and also a key step in acquiring high-precision 3D velocity structure. Based on the deep seismic data of the ocean bottom seismometer (OBS) experiment carried out in the IODP 367/368 drilling area on the Continental-Oceanic-Transition zone (COT) of South China Sea (SCS) , this paper improved the previous shots and OBSs' relocation program mainly with three aspects. (1) The position of the intermediate shot is corrected by the average heading angle of three consecutive shots, which more realistically reflects the soft connection between the air gun array and the hull. (2) According to the Sliding Window idea, the water wave velocity threshold was divided into N equal parts, and the global optimal OBS position correction result could be obtained through the loop test, which solved the problem that the previous method could only obtain the local optimal solution; (3) To improve the accuracy of single line OBS relocation, travel-times were picked from in-line shots and nearest off-line shots, where a quasi-crossline model was built to improve the correction accuracy. 49 OBSs' positions were finally relocated. Except that the three OBSs corrected by single line method had large uncertainty in the vertical line direction, the remaining semi-major axis of error ellipses of all the OBSs were about 35 m. This approach not only makes better use of the high-quality data of the 3D OBS experiment in the IODP drilling area, but also provides accurate data base for the subsequent acquisition of the 3D velocity structure, and can provide solution to shots and OBS relocation of air-gun OBS survey in the future. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18581]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510301, Peoples R China 2.Hubei Earthquake Agcy, Hubei Key Lab Earthquake Early Warning, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang FuDong,Zhang JiaZheng,Du Feng,et al. A new method for shots and OBSs' relocation applying in three-dimensional seismic survey[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(2):766, 777. |
| APA | Yang FuDong.,Zhang JiaZheng.,Du Feng.,Wang Qiang.,Pang XinMing.,...&Qiu XueLin.(2020).A new method for shots and OBSs' relocation applying in three-dimensional seismic survey.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(2),766. |
| MLA | Yang FuDong,et al."A new method for shots and OBSs' relocation applying in three-dimensional seismic survey".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.2(2020):766. |
入库方式： OAI收割
来源：南海海洋研究所
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