Abstract：Many near surface scattering sources in piedmont fault zones, Western China cause low S/N seismic data and non-uniform reflection energy on target interfaces. So we propose a solution of infill shot point design for target illumination uniformity improvement. First we simulate seismic illumination of a regular geometry with two-way wave equation. Then, we simulate seismic shooting at shadow areas of target illumination. When first breaks arrive at the surface, we calculate the surface propagation direction with Poynting vector and the surface illumination energy. The main beam direction of source is determined by direction statistics. And infill source locations are determined by energy statistics. Models test show that our proposed method can greatly improve illumination energy of the shadow zones and target illumination uniformity, which may be very helpful for acquisition geometry optimization in complex subsurface areas.
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