北汉庄油田三垛组一段储层沉积微相研究及其应用

本文结合研究区有限的取芯资料,通过砂体的沉积特征、测井相特征及砂体的空间分布对北汉庄油田三垛组一段进行了系统的沉积微相研究。结果表明,三垛组一段为河流相沉积,主要发育边滩、决口扇、泛滥平原、心滩、河道间5个微相。在此基础之上,通过单井剖面和井间剖面对比分析,研究沉积微相在垂向上和平面上的变化规律,并综合砂体厚度展布特征和地层厚度特征,编制了研究区内不同砂层组沉积时期沉积微相平面展布图。结果表明,三垛组一段底部辫状河河道沉积微相沉积的VIII砂体在研究区是最好的储层。这种对储层的详细解释以及对其沉积微相的精细描述有助于优质储层的鉴别和分布预测。

Study and application on the sedimentary microfacies of member one of the Sanduo Formation, in Beihanzhuang oilfield

This article elaborated on the deposition to the northern Jiangsu Qintong hollow Beihanzhuang oil field goal reservoir's sedimentary microfacies to study and the reservoir evaluation.To divided the sand-body of this area into five kinds of deposition subfacies of the snaking stream,the braided river,crevasse splay,floodplain,overbank.Then,make more delicate division of the deposition sub-facies to sedimentary microfacies.The approaches of the vertical and horizontal changes of the sedimentary microfacies are mostly based on the data on the individual well sections and inter-well sections.Combined with sand-body thickness and distribution character,we made the graph showing the distribution of the sedimentary microfacies during the deposition of different sandstone groups in the study area.And though analysis,we make a evaluation for the reservoir of this oil field.