Abstract: Songyuan City has high rise towers and the Songhua River crosses the city. It is surrounded by dunes, woodland, and farmland, Fuyu oil pipelines and facilities are construed throughout the city. Seismic acquisition is difficult to be launched in the city because it has complicated surface conditions, shallow target layers, and too many complicated faults. Through repeated demonstration, two major techniques are adopted for seismic acquisition, one is launched in the city including the design of shot points and receiver points, the combination of vibroseis with explosives, the multi-way surface investigation, and modeling all based on satellite photos, the other is high-resolution acquisition of small face, point-by-point depth design, and high-resolution static correction. They ensure the integrity and accuracy of the information of target layers. The techniques of denoising before stack, high-fidelity processing and residual static correction are used for seismic processing to improve the accuracy of information. Guided by the phase mode, the techniques of well seismic calibration and full 3-D seismic interpretation are used for interpretation, describing the faults, structures, and sand bodies accurately. Good results have been obtained by using the above methods, laying solid basis for the adjustment of the programs of exploration and development in Fuyu old oilfields, providing sufficient basis to prove and use Yangdachengzi reservoir. Hence the purpose of finding oilfields below oilfields and continuous production of old oilfields is fulfilled.

Key words: Songyuan City, Fuyu Oilfield, fault, 3D seismic, acquisition, processing, interpretation