Main diagenesis of middle-lower Ordovician of Yubei Area in Tarim Basin

摘要

According to analysis of cores, rock sections, casting sections, logging data of Ordovician carbonate reservoirs in the Yubei area, reservoir rock in the study area include 4 types: mud micrite limestone, grain limestone, biological limestone and dolomitic limestone. In combination with core photos and imaging logging analysis, reservoir can be divided into pores and cracks. Diagenesis mainly includes compaction, pressolution, cementation, filling, recrystallization, dolomitization, dissolution. To sum up, the main constructive diagenesis include recrystallization, dolomitization, dissolution, otherwise the main destructive diagenesis include compaction, pressolution, cementation, filling.