The reservoir diagenesis of Bazhou Depression

Minhe Basin was intense.The major diagenesis of clastic rocks in the Hekou Formation and the upper section of the Datonghe Formation was mechanical compaction and calcite cementation.The major diagenesis of the lower section of the Datonghe Formation and the Yiaojie Formtion was authigenic clay and quartz mineral cementation and fracturing.The primary pore texture of the reservoirs was destroied by diagensis.The fracturing transformed the reservoirs of the lower section of Datonghe Formgtion and the Yiaojie Formation into dense fracture reserviors.