【摘要】 黔东南地区寒武系地层是典型的碳酸盐岩地层。分布广泛且有较好的储层。为了更好地了解该地层的岩性、孔隙状况等地质特征,以贵州东部三都—丹寨剖面寒武系地层为例,分析了各组段的岩石学特征,确定了其沉积环境,在此基础上对形成现有岩石孔隙等特征的相应的成岩作用进行了分析。指出白云化作用是该区的主要成岩作用,主要表现在中寒武统都柳江组—在准同生白云化作用下形成大套厚层的白云岩。埋藏溶解作用形成的次生溶孔是该区中上寒武统的典型特征,有利于改善碳酸盐岩的储层物性。重结晶作用、压溶作用等对储层孔隙的形成也起到重要作用,并列出了黔东南地区寒武系地层各层组的成岩演化史。更多还原

【Abstract】 The Cambrian in the southeast of Qian is composed of typical carbonate rocks, which are widespread and better reservoirs. In order to understand the lithology, porosity and so on, in this paper, we took the Cambian in Sandu Danzhai to analyze petrographic feature in each layer and concluded the diagenetic environment of every formation of the Carbonate. Based on these study, we obtain the corresponding diagenesis which is responsible for producing the porosity of the rock, point out dolomitization is the main diagenesis in Duliujiang Formation of the mid Cambrian froming the larger and thicker carbonate rock, and dissolution pores produced by the burial dissolution is typical characters of the mid and upper Cambrian in the study area, burial dissolution is favorable for improving the reservoir physical properties. Recrystallization and compaction dissolution have also positive effect in producing porosity within the reservoir. This paper shows clearly the diagenetic evolution history of each formation within the Cambrian in the southeast of Guizhou province.更多还原