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| THE APPLICATION OF CHROMATOGRAPHY TECHNOLOGY TO NEAR-SURFACE STRUCTURE INVESTIGATION OF THE LOESS AREA |
| WEN Xue-kang1, LIU Sheng2, LI Shi-qiong3, ZHONG Jia-jun2 |
1. Engineering Supervision Center, Southwest Bureau of Petroleum, SINOPEC, Deyang 618000, China;
2. No. 2 Geophysical Party, Southwest Bureau of Petroleum, SINOPEC, Deyang 618000, China;
3. Deyang Branch Institute, Exploration and Production Research Institute, Southwest Bureau of Petroleum, SINOPEC, Deyang 618000, China |
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Abstract 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 difficult to 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 regions. 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 design and the establishment of the initial model for static correction processing.
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Received: 23 March 2011
Published: 10 October 2012
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