Abstract：
The complex geological conditions in doubly complex areas tend to result in difficult surface survey operations and poor target layer imaging in the subsurface which has a great impact on seismic data quality. In this paper, we propose an optimal crooked line survey method for decreasing the surface survey operational diffi culties and improving the sub-layer event continuity. The method concentrates on the surface shooting conditions, first, selecting the proper shot positions based on the specifi c surface topographic features to reduce the shot difficulties and then optimizing the receiver positioning to meet the prerequisite that the subsurface refl ection points remain in a straight line. Using this method cannot only lower the shooting diffi culty of rough surface condition areas but also overcome the subsurface reflection point bending problem appearing in the traditional crooked line survey method. On the other hand, we use local infill shooting rather than conventional overall infill shooting to improve sublayer event continuity and uniformity with lower survey operation cost. A model has been calculated and processed with the proposed optimal crooked line survey and local infi ll shooting design method workfl ow and the results show that this new method can work for seismic surveys in double complex areas.
ZHAO Hu,YIN Cheng,WU Ming-Sheng et al. Research on seismic survey design for doubly complex areas[J]. APPLIED GEOPHYSICS, 2012, 9(3): 279-285.
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2012, Vol. 9 
