Logging evaluation method of tight sandstone reservoir in Sichuan basin

The continental clastic rock formation of Sichuan basin is of deep buried depth and dense lithology,and it is a typical low porosity and low permeability reservoir.In view of the problems such as complex lithology,multiple influencing factors of logging environment,difficulty in reservoir evaluation and etc,by use of core experiment,property analysis,thin section identification,FMI imaging and nuclear magnetic resonance(NMR)data,combined with the test data and logging information conversion relationship,the calculation method of tight sandstone reservoir parameters has been studied.By using nuclear magnetic logging,the comprehensive evaluation of reservoir quality has been made,and it has played a good role in the process of effectiveness evaluation of tight sandstone reservoir and the aperture analysis.Therefore,a continental tight sandstone reservoir logging evaluation method has been established.With this method,the interpretation result is consistent with the field test results.