【摘要】 本文通过运用沉积学的分析方法,对饶阳凹陷大王庄地区沙三段碳酸盐岩的沉积特征及含油性进行了研究。研究表明,该区湖相碳酸盐沉积可以划分为3个沉积区——滨湖区、浅湖区和较深湖区,4种亚相——生物滩亚相、鲕粒滩亚相、湖湾亚相、泥晶碳酸盐岩亚相以及若干种微相。这些亚相和微相明显受到古构造和古地形控制,进而建立起缓坡型与陡坡型两种碳酸盐沉积模式。缓坡型模式的特点是地形平缓,沉降慢,相类型多,相带宽,储集性好;陡坡型模式则以地形较陡,沉降快,相类型单调,相带窄,储集性较差为特征。讨论了沉积环境对碳酸盐岩分布及储集性的控制。更多还原

【Abstract】 In this paper carbonate deposition characteristic and hydrocarbon distribution are studied by using the sedimentology analysis method. The results show that the carbonate deposits can be divided into three depositional belts, four kinds of subfacics and several kinds of microfacies at Shahejie formation of Dawangzhuang district in Raoyang depression. These subfacies and microfacies are controled by the palaeostructure and palaeotopography. Two different types of facies models-gentle slope patten and steep slope patten are given. Gentle slope is characterized by the gentle topography, slow subsidence, more types of facies, wide facied-belt and good reservoir quality, and steep slope is characterized by steep topography fast subsidence, monotonous types of facies, narrow facies-belt and bad reservoir quality. Depositional environment control of the reservoir quality and oil-bearing characteristic has been discussed.更多还原