Abstract: Abstract：Reservoir of the fourth member of Xujiahe Formation of Tongnanba structure is more dense in east Sichuan. Com-
bining methods of such as geophysical inversion，seismic attribute analysis，gas-bearing reservoir seismic response analysis，
we make sand body prediction first. Then，on the basis of knowing the distribution of sand body clearly，we make porosity
prediction，looking for parts of relatively high porosity of sand body. At the same time，we predict gas-bearing reservoir on
the basis of studying geophysical response model of gas-bearing reservoir，and finally，we make predictions about plane dis-
tribution of high-quality reservoir of the fourth member of Xujiahe Formation. This method，making use of various geological
and geophysical information，and combining many methods of reservoir prediction，from sand body prediction and high poros-
ity sand body prediction to petroleum sand body prediction，works well in looking for high-quality reservoir and pointing out
favorable target area of exploration，and thus provides effective scheme for tight clastic rock reservoir exploration.

Key words: Key words：Eastern Shichuan, Tongnanba Structure, tight sandstone, high-quality reservoir, reservoir prediction