Abstract: Considering the geomorphic feature of the loess area in eastern Ordos Basin where the reservoir is relatively thin, seismic exploration was conducted to suit local conditions in recent years. The straight line method and the crooked line method in valleys were applied, and some exploration results were achieved. To further characterize the distribution of sand bodies, forecast the effective reservoir, and to carry out effective lithological stratigraphic traps, full digital seismic research was launched in loess area of eastern Ordos Basin in 2007 and 2008. First is the seismic acquisition technology characterized by small group, long arrangement, high density, high coverage, and digital geophone single-point reception. Second is the seismic data processing technology characterized by high fidelity and high signal-to-noise ratio to maintain dynamic characteristics. Third is prestack and poststack seismic attribute analysis and reservoir predicting technology which is guided by high-precision stratigraphic sequence. The combination of the three technologies improves the accuracy of reservoir prediction and provides technological support for natural gas exploration and development in the east of the basin.

Key words: Ordos Basin, loess area, full digital, digital geophone