论文部分内容阅读
针对苏里格庙地区盒8段砂岩强烈的成岩作用是造成储层非均质性强的主要原因,不同的沉积微相其胶结类型不同,从而导致酸性水溶蚀次生孔隙发育的程度迥异。通过沉积微相分析以及大量岩石显微薄片的观察,总结出7种苏里格庙地区中二叠统石盒子组盒8段砂岩储层成岩相,并分析了5种沉积充填类型(序列)与成岩相的关系。总结出高渗储层发育的有利成岩相带为净砂岩溶蚀相和净砂岩弱压实弱胶结成岩相,它们主要发育在辫状河心滩和三角洲平原分流河道微相中。根据沉积相展布及成岩相发育规律,对苏里格庙及其外围地区的高渗储集层发育带进行了预测。
The strong diagenesis of Box 8 sandstone in Suligemiao area is the main reason for the strong heterogeneity of the reservoirs. Different sedimentary microfacies have different types of cementation, leading to different degrees of development of secondary pores by acid water dissolution. Through the analysis of sedimentary microfacies and the observation of a large number of rock thin slices, the diagenetic facies of sandstone reservoirs in the 8th member of the Middle Permian Shixianzi Formation in the 7 Suligemiao area were summarized. Five types of sedimentary fillings (sequences) And diagenetic facies. It is concluded that the favorable diagenetic facies belonged to the neo-sandstone facies and the weak compacted and weakly cemented diagenetic facies of the net sandstone. They mainly develop in the braided river heartht and delta plain distributary channel microfacies. According to the distribution of sedimentary facies and the law of diagenetic facies development, the development zones of the high permeability reservoir in the Suligemiao and its periphery are predicted.