Abstract：The reservoir type in Yongxing area belongs to complex fault-block reservoir, which is characterized by complex structure, multiple reservoir types and abundant oil/gas-bearing bed set. The main problem of seismic exploration in the area is lower imaging precision of low-sequence faults. In order to solve this problem, the high-precision seismic acquisition was deployed in the area, including following technical links: ①geometry design, designing bin size-fractionized high-precision acquisition geometry that is characters of high density, uniform spatial acquisition, high folds and multiple channels; ②near-surface structure survey, adopting near-surface structure surveying methods such as near-surface coring, shallow refraction, uphole survey of single hole, uphole survey of double holes and geologic radar et al, which determined the thickness, velocity and lithology of weathered and sub-weathered zone, created isopachous map of high-velocity layer in the area, providing foundation for selection of shooting conditions; ③receiving techniques, the main parameters selected in geophone array are geophone interval,group interval,array pattern and connecting pattern;④shooting techniques, which highlights the control of shooting-hole depth, elevation control and shooting charge size control. The total S/N ratio of single-shot record acquired by high-precision seismic acquisition is very high, the imaging quality and S/N ratio of fault on the section are very high; the smaller the bin size, the higher the resolution of geologic body, and the higher the precision of positioning of lateral migration as well.
