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| The optimization of the excitation technique for the gravel-bearing piedmont zone |
| ZHANG Jian, LIU Meng-Hua, SU Teng-Fei, CAO Rui-Shan, LIANG Liang |
| Shengli Branch, SINOPEC Geophysical Corporation, Dongying 257100, China |
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Abstract The complex piedmont zone with good reservoir conditions is an important field of oil and gas exploration. However, the seismic data have a low signal-to-noise ratio and poor imaging accuracy because of the complex surface and near-surface and subsurface structure. Based on the shooting characteristics which exist in the gravel area of piedmont zone the authors consider that we could conduct points design with the aid of Google Earth platform during the process of selecting piedmont shooting points. The principle of selecting low areas instead of high areas, gravels instead of rocks and flattened places instead of steep places should be adopted during the selection of shooting points. Tomographic inversion technique goes for the investigation of the piedmont surface layer. The well depth design should be shot in the areas with high speed, strong shooting energy and high excitation frequency. The data acquisition of ZD district indicates that the shooting way of the piedmont gravel area adopted in this paper can improve the quality of seismic data.
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Received: 08 February 2014
Published: 10 December 2014
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