Diagenesis of Xiaohaizi Formation in Bamai Region of Tarim Basin
By means of core observation,casting thin sections and cathodoluminescence,the rock type and diagenesis of Xiaohaizi formation in Bamai region were sufficiently researched. The results shows that the physical properties of residual grain of gray matter dolomite and crystal dolomite are better than those of limestone in Xiaohaizi formation;The influence of diagenesis on reservoir physical property is larger,the constructive diagenesis is dolomitization,dissolution and fracture,the destructive diagenesis is mud crystallization,compaction and cementation filling; recrystallization and pressolution diagenesis have not obvious effect on reservoir physical property. The research has some significances for the reservoir diagenesis of Xiaohaizi formation,also can provide the basis for later exploration.