塔中隆起石炭系C_Ⅰ油组储集层成岩模式与储集性能的关系

DIAGENETIC MODE AND ITS RELATION TO QUALITY OF CⅠ OIL GROUP RESERVOIR OF CARBONIFEROUS SYSTEM IN TAZHONG UPLIFT.

总结了塔中隆起石炭系ＣⅠ油组石英砂岩储集层的压实、压溶、胶结、溶解、交代作用等成岩特征，划分出准同生期、早成岩Ａ期和Ｂ期、晚成岩Ａ期和Ｂ期五个成岩阶段，通过成岩机理的分析，提出本区成岩环境是一个半封闭到封闭的系统，建立了成岩模式，并讨论了成岩作用的影响因素及其与储集性能的关系。

This paper summarized the diagenetic features of CⅠ oil group quartzose sandstone reservoir of Carboniferous system in Tazhong uplift, such as compaction and pressure solution, cementation, dissolution, alteration and replacement. Five stages of diagenesis were classified, including penecontemporaneous, early diagenetic stage A and B, late diagenetic stage A and telodiagenetic stage B. By analysis of the diagenetic mechanisms, furthermore, diagenetic mode is established. For the first time, it is pointed out that the diagenetic environment in this region was a semi sealed to sealed system. Factors affecting the diagenesis and their relations to reservoir quality of CⅠ oil group are discussed.