The main diagenesis includes compaction, cementation, corrosion and dissolution, etc. which belongs to stage a of middle diagenesis phase.
典型的成岩作用类型包括压实作用，胶结作用和溶蚀、溶解作用等。成岩阶段属中成岩a期。
Middle diagenesis facies can be diveded into three subfacies, dissolution, dissolution- cementation and compaction, while dissolution can be divided into four microfacies.
中成岩相分为溶蚀、溶蚀—胶结、紧密压实三个亚相，溶蚀—胶结又分四个微相。
Deep formations: including those deposits Ed to diagenesis after middle stage and basic rocks, and these formations are brittle in nature.
深部成岩作用深于晚成岩中期阶段的沉积岩及基岩，为脆性地层。
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