The Application of Chromatography Technology to Near-surface Structure Investigation of the Loess Area

详细信息   

• 责任者：Wen Xuekang (Engineering Supervision Center ; Southwest Bureau of Petroleum ; SlNOPEC ; Deyang 618000 ; China) ; Liu Sheng
• 刊名：Geophysical and Geochemical Exploration
• 出版年：2012
• 卷期：36(5)
• 关键词：黄土塬 ; loess tableland ; 折射波法 ; refraction methods ; 层析技术 ; tomography ; 陕西 ; Shaanxi Province
• 页码：p.766-771
• 图表：2 illus., 3 tables, 15 refs.
• 分类号：1600
• issnNo：ISSN1000-8918
• isbnNo：CN11-1906/P

摘要

In western China＇s loess area, the static correction problem is very prominent. Fine, accurate near-surface structure survey is very important for solving the problems of excitation well depth design and static correction. However, on the one hand, the terrain is very complex, resulting in extremely low conventional rolling refraction interpretation accuracy; On the other hand, it＇s very difficultto trace the high-speed layer through the micro logging because of the thick loess coverage. Therefore, the problem as to how to take good shot records and how to do well in the static correction processing has become a major difficulty in seismic exploration of these re- gions. The authors proposed a new method for near-surface structure survey on the basis of full test, i.e. , the chromatography method, which can effectively solve the difficulty. A comparison with the conventional refraction method shows that this method can obtain richer information and depict more finely the near-surface structure. Therefore, it can be used fairly well in such aspects as the well depth de- sign and the establishment of the initial model for static correction processing.