Abstract: With exploration continually unfolding in Liaohe Oilfield, the demand for 3D seismic data, high-resolution 3D seismic data in particular, is higher and higher during the stage of reservoir-aimed oilfield development while its application is more and more extensive. Therefore, it is a realistic task at the 3D seismic data processing stage to use high-resolution processing technology for further improvement of seismic data quality and tap the potential for application of seismic data for reservoir development. The study is aimed to solve some actual problems, such as inadequate resolution of seismic data for the main targets in Ma-19 Block-- Es1, Es2 and Es3, unclear distribution of micro faults, and difficulty in deployment of horizontal well. Based on geological research of the targets and analysis of well data, the study of reservoir-aimed high-resolution processing technology covers five areas, such as amplitude-preserving, expansion of CRP trace gather frequency band, and pre-stack inversion. The processing method sees significant changes as compared to seismic data processing in the previous exploration stage. The study is focused on seismic processing technology for reservoir development of the oil fields for the first time, effectively helping the processing technology extend into the development field. Meanwhile, the study has accumulated precious experience for Liaohe Oilfield to promote fine pre-stack inversion at the next stage.