Seismic acquisition techniques in complex mountainous areas: Case study in Kuqa Foreland Basin, western China

How to raise the signal to noise (S/N) ratio of the data is the most important task in the seismic exploration in complex mountainous areas of Kuqa foreland basin, western China. Because of the complex surface and subsurface conditions encountered in these areas, the seismic data acquired are in low S/N ratio and difficult in imaging the geological targets underground, therefore influencing the knowledge of the geological structure and the oil-gas resources assessment of the region. In order to raise the S/N ratio of the seismic data and further develop the oil-gas exploration, the long geophone array length receiving technique and the wide line seismic acquisition technique were applied in these areas and proved to be very successful. The two techniques can raise the S/N ratio of seismic records, raise the CMP fold considerably and finally improve the quality of the seismic stack section effectively.