Abstract：Time-lapse (TL) seismic exploration has seen some successful real cases in oil development fields and there are also many articles that discussed the feasibility proof of TL seismic exploration. But there are still often some problems need to be solved for feasibility proof of TL seismic exploration and data processing in such conditions as land thin interlayer (thickness of reservoir is less than 10 m),strong ground absorbtion,poorer signal-to-noise ratio and effect of shot and receiver factors with severe special changes. Starting from analysis of real seismic data probiems (such as 50 Hz industrial interference,formation absorption,special change in shot energy and frequency,near-surface reverberation interference and receiver effects etc.),the paper discovered that these problems are often difficult to be solved if using conventional processing methods and cross-equalization process. For this reason,the paper presented special processing methods and flow scheme aimed at above-mentioned problems,better diminished influences of these interference and obtained difference information on TL seismic reservoir in a condition of without using cross-equalization process.
