Application of Phase-Stabilization Q Migration Technology in Horizontal Well Deployment

The oil and gas resources of Fuyu formation is huge in X area on the northern Songliao Basin. However, due to the thin single sand body, rapid lateral variation and complex multi-layer superimposed assemblage relationship, the ability of seismic resolution of thin sand body is seriously restricted in the Fuyu formation in the north of Songliao Basin. It is urgent to explore effective seismic processing methods to support the deployment of horizontal wells. In order to meet the requirement of high resolution seismic processing in Daqing Oilfield, the absorption attenuation during seismic wave propagation is considered in this paper, and the migration from fully elastic medium to viscous acoustic medium is advanced from phase stabilization pre-stack Q migration technology (QPSTM). The equivalent Q model of seismic data is determined by Q scanning technique, and the stability problem of mid-deep absorption compensation and the problem of noise suppression are solved by introducing gain limiting function. The phase stabilization pre-stack Q migration method with absorption medium can recover the deep high frequency information during the process of migration, widen the frequency band, and improve the resolution of seismic data. QPSTM plays an important role in horizontal well deployment in X area of Daqing Oilfield. The sand body of viscoelastic migration processing data is identified accurately, the ZP20 well is successfully deployed according to the results of QPSTM. This technology will effectively improve the seismic resolution of middle and shallow layers in Daqing oilfield and support the deployment demand of horizontal wells in Fuyu reservoir.