Coal seismic surveying over near-surface basalts: Experience from Central Queensland, Australia
文献类型：期刊论文
| 作者 | Zhou, Binzhong1; Hatherly, Peter2; Peters, Troy3; Sun, Weijia4 |
| 刊名 | GEOPHYSICS
 |
| 出版日期 | 2014-03-01 |
| 卷号 | 79期号:2页码:B109-B122 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/GEO2013-0259.1 |
| 文献子类 | Article |
| 英文摘要 | Seismic reflection surveying in basalt-covered areas often fails to image underlying reflectors. To gain insights into the nature of the problem and obtain potential solutions, we have conducted experimental 2D seismic reflection and offset VSP surveys at two coal mines in the Bowen Basin of Australia. At the first mine, the basalt is relatively deep (114 m) and relatively thin (20 m). Conventional seismic acquisition and processing of a 2D seismic line provide poor results. However, upgoing reflections from layers below the basalt are clearly evident in the VSP survey and prestack depth migration is able to improve the continuity of the reflectors beneath the basalt. At the second mine, the 360 m wide basalt is at a depth of 40 m and has a thickness of about 40 m. It is fresh and unweathered and consists of multiple flows which are interlayered with unconsolidated sediments. Long-offset data acquisition combined with prestack depth migration was expected to produce satisfactory results but this is not the case. The associated VSP survey suggests that the problems at this mine are due to (1) the generation of complex downgoing and upgoing wave-fields within the basalt and (2) significant scattering of surface waves from outside the basalt at the margins of the basalt. Another problem is that the target coal seams are at about 300 m depth and the muting required to remove refraction events limited the effectiveness of the prestack depth migration. Reducing the strength of the surface waves through selection of an appropriate source and placement of shots at the base of the low-velocity zone (as had been the case at the first mine) will therefore improve the chances for a successful outcome. A Vibroseis survey subsequently undertaken at the second mine, which produced shot records with reduced surface waves, shows this to be the case. |
| WOS关键词 | WIDE-ANGLE ; SHETLAND ; SUBBASALT ; EXPLORATION ; APERTURE ; MARGIN ; FAROES ; NORTH ; ROCKS ; BASIN |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000336918700008 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| 资助机构 | Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86094]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhou, Binzhong |
| 作者单位 | 1.CSIRO Earth Sci & Resource Engn, Kenmore, Qld, Australia 2.Coalbed Geosci Pty Ltd, Mcmahons Point, NSW, Australia 3.Velseis Pty Ltd, Sumner Pk, Qld, Australia 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Binzhong,Hatherly, Peter,Peters, Troy,et al. Coal seismic surveying over near-surface basalts: Experience from Central Queensland, Australia[J]. GEOPHYSICS,2014,79(2):B109-B122. |
| APA | Zhou, Binzhong,Hatherly, Peter,Peters, Troy,&Sun, Weijia.(2014).Coal seismic surveying over near-surface basalts: Experience from Central Queensland, Australia.GEOPHYSICS,79(2),B109-B122. |
| MLA | Zhou, Binzhong,et al."Coal seismic surveying over near-surface basalts: Experience from Central Queensland, Australia".GEOPHYSICS 79.2(2014):B109-B122. |
入库方式： OAI收割
来源：地质与地球物理研究所
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