Besides the faults developed in the rock mass, deferent kinds of erosion,weathering and unloading are widely spread,producing the complicated rockmass conditions in the right bank.

Mesozoic Era complex plutonic masses from Shangyong area are composed of the plutones that are formed by Indosinian and Yanshanian cycle of structural magma and have different combination types.

These case examples include: Reservoir characterization and productivity evaluation by using NMR logging, determination of reservoir porosity in complex lithology, identification of oil, water and gas zones under complex reservoir conditions where resistivity log data give poor indication, guiding the.

The kinetic mechanism of the rock with acid and the fracturing methods of complex lithology,on which people have little knowledge,have much different from common carbonate formations.

Based on complex lithology reservoir eveluations and combined with reservoir structure and geology characteristics,analyzed are log responses in the abnormal compressional belts,and hense the purposeful or corresponding log interpretations are made.