摘要
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 sandstone reservoirs of He 8 section in Suligemiao Area were formed by vigorous diagenesis.This is the main reason that the reservoir heterogeneity is obvious.Generally,different sedimentary microfacies developed different types of cementation that controlled distribution and intention of secondary pore dissolved by acid water solution.Through studying sedimentary microfacies of He 8 reservoir and analyzing about 800 thin sections,diagenetic facies of He 8 reservoir are classified as seven types.The relationships among diagenetic facies and five types of sedimentary packing sequences are discussed.The result shows that the favorable diagenetic facies are net sandstone dissolvable face and greywacke face,corresponding braided river point bar microface and delta plain distributary channel microface respectively.Based on sedimentary spread and diagenetic facies upgrowth disciplinarian,the distribution of highpermeability reservoirs in Suligemiao and its external areas was predicted.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第6期667-671,共5页
Journal of Northwest University（Natural Science Edition）
