It is difficult to understand the internal structure

the reservoir space distribution

pore types

the relation between reservoir development zones and the localities of structures of fractured reservoirs only using seismic and well log data.But imaging and nuclear magnetic resonancelog can help us to get good results.Based on the data of drilling

log

well log

well test and core

core calibration and graduation log data were used to set up log response and make rock discrimination

then use acoustic image to identify fractures

pores and cavities as well as their efficiency

finally use nuclear magnetic resonancelog data to set up well log interpretation model

quantify reservoir parameters and identify the fluids in reservoirs. This method was used in the assessment of carbonate resevoirs of Chengbei 30 buried hill

the results are satisfactory.