Application of High-Precision Imaging Methods in the Drilling of Tight Oil Horizontal Wells in Block a of the Sanzhao Area

The Tight oil resource potential of Fuyu oil layer in Sanzhao area of Songliao Basin is huge, which is the key direction of current exploration work in Daqing. The tight oil reservoir in Block A shows significant lateral heterogeneity. The single-layer thickness is thin, and the thin interbedded structure is widely distributed. The high-precision imaging of thin interbedded targets is difficult. In this paper, the surface wave simulation attenuation technology based on wave equation is used to protect the low frequency denoising. The high-precision velocity field is constructed by the integrated modeling of the first arrival wave and the reflected wave. Combined with VSP data, high-precision equivalent Q field is established. The time-space-varying migration dip angle aperture field based on Fresnel zone is constructed to compensate the attenuation and dispersion of seismic wave amplitude caused by the viscosity of propagation medium in the migration process, restore high-frequency information, and realize broadband and high-precision imaging in the target area. The frequency band of seismic processing results is broadened by more than 15 Hz, which effectively improves the seismic recognition ability and reservoir prediction accuracy of thin interbedded sand bodies. The drilling results of horizontal well well1 in Block A show that the horizontal section is 1050 m long, the drilling rate of sandstone is 96.2%, the drilling rate of oil layer is 96.0%, and the daily production of oil test is 15.64 t. It is proved that the high-precision broadband imaging technology has good effect on seismic imaging support and reservoir characterization of tight oil horizontal wells in Block A of Sanzhao area.