【摘要】 在湖南大庸四都坪一带上震旦统陡山沱组中,发育有类型较多的重力再沉积碳酸盐岩,即(1) 重力流沉积中的碎屑流沉积和浊流沉积;(2) 滑塌沉积,陡二段中滑塌沉积尤为突出。陡山沱组的沉积相划分为开阔陆棚相和斜坡相两个相带,斜坡相带又分为上部斜坡亚相和下部斜坡亚相两个亚相带。建立起了四都坪一带的沉积相模式。陡山沱组的储集空间有晶间孔隙和裂隙缝洞空间。晶间孔隙主要发育在陡一段下部的粗粉晶含灰云岩中,白云石晶体为自形晶和半自形晶。裂隙缝洞在陡二段上部的细-中晶白云岩中最为发育,位于斜坡带上,沿斜坡带广泛分布。上述两种类型的储集空间都不同程度地被沥青充填。更多还原

【Abstract】 In Siduping area of Dayong, Hunan, resedimented carbonate rocks are derived from various types of gravity flow, including 1) debris flow deposits and turbidites, and 2) slump deposits which are especially distinctive in thesecond member of the Doushantuo Formation. The sedimentary facies of the Douhantuo Formation can be divided into two main facies: open shelf and slopefacies; and the latter canbe subdivided into upper slope subfacies and lower slope subfacies. A model of sedimentary facies in Siduping area has been established. The reservoir spaces of the Doushantuo Formation consist of inter crystalline pores and fracture voids. The former are mainly developed in the coarsesilt grained, euhedral and semi-euhedral crystalline calcitic dolomites occurring in the lower part of the first member of the Doushantuo Formation. The latter are developed mostly in the fine-medium grained dolomites of the upper part of the second member which is distributed widely along the slope. Both of the two types of reservoir space are now filled with asphalts in different extent.更多还原