Abstract: The 3D seismic exploration is the key technologies to support lithologic gas reservoir prediction and well
deployment in west Sichuan. Through the research of seismic acquisition， processing， interpretation， reservoir and
fluid prediction of Jurassic lithologic gas reservoir exploration in west Sichuan depression， a suit of key technology
is summed up， that is， in seismic data acquisition， the key is good design and quality control； in processing， the key
is to preserve amplitude processing； in interpretation， the key is to insist“whole， automatically， fine” three basic
criteria； the reservoir prediction relies on the amplitude information， and flow forecast makes full use of parameters
of frequency and absorption. These technologies are carried out in 10 districts， deploying more than 60 exploration
anddevelopmentwells， andsubmittingprovenreservesofabout500billioncubic. Furthermore， thesetechnologies
arealsoanimportantreferencefortheexplorationofdenseclasticrockgasreservoirthatwidelydistributedinChina.

Key words: Western Sichuan, lithologic gas reservoir, seismic exploration, key technology