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研究区白云岩成因类型可划分出准同生白云石化、回流渗透白云石化、混合水白云石化、压溶白云石化和埋藏白云石化。本文详细研了各成因类型的白云岩矿物岩石学特征和地球化学特征，重点探讨了埋藏白云石化Ｍｇ２＋来源及其搬运机理。认为埋藏白云石化Ｍｇ２＋来自粒间残留古海水，迁移机制与地下异常高压孔隙流体的驱动和襄樊－广济同沉积断裂的活动有关。五类白云岩中以混合水白云石化和埋藏白云石化的岩石类型储集性能最好。
The dolomite genetic types of the study area can be divided into quasi-syngenetic dolomitization, reflux infiltration dolomitization, mixed water dolomitization, pressured dolomitization and burial dolomitization. In this paper, the mineralogical and geochemical characteristics of dolomite of various genetic types are studied in detail, and the sources and transport mechanism of buried dolomitized Mg2 + are discussed. It is considered that the burial dolomitization of Mg2 + is caused by the residual seawater between grains, and the migration mechanism is related to the driving of abnormally high-pressure pore fluid and the Xiangfan-Guangji sedimentary fracture. Among the five types of dolomite, the reservoir type with mixed dolomitization and burial dolomitization is the best.