Abstract：Sanhu area inQaidam Basin is the fourth largent land gas field inChina. Gas reservoirsareburied in shallow Quaternary strata，and are characterized by unconsolidated medium and weak diagenests.SeismicSeismic data obtained by the traditionalacqutstttonLow signal-to-noisehas some disadvantages:①ratio and low resolution datacannot meet the requirements of natural gas explo-ration;②Because of the shallow target formation, itis difficult to recognize abnormality caused by near-sur-face or gas-bearing layers. This paper introduces a se-ries of high-density seismic acquisition methods, inclu-ding high-density geometry design, optimized shoot-ing, digital geophone receiving, accurate near-surfacestructure survey，and high-precision refractionstatic correction in this area.Application resultsshow that seismic data with the characteristics ofhigh signal-to-noise ratio，high resolution and highfidelity can be obtained using the proposed seismicacquisition technologies.As a result of decreasingthe near-surface abnormality，seismic data inter-pretation precision is significantly improved.
