Core

thin section

logging and drilling data were integrated to study and identify sedimentary facies

diagenetic facies and pressure facies of the reservoir rocks in the Toutunhe Formation of Fudong slope area

Junggar Basin.On this basis

we divided petrophysical facies

performed comprehensive evaluation of the reservoirs

and predicted favorable reservoir development areas.A total of 15 petrophysical facies were identified according to the sedimentary faices

diagenetic facies and pressure facies.Quantitative discriminant functions were built for each of the 15 types of petrophysical facies by using GR

acoustic

density

compensated neutron and deep resistivity logs

and in combination with Fisher typical discriminant

and the correctness of the identification result was tested.The petrophysical facies of the three members in this Formation were mapped based on thin section observation.The reservoirs in the Toutunhe Formation were comprehensively evaluated and classified into four types in combination with production test results

realizing prediction of favorable reservoirs of the Toutunhe Formation.