摘要
鄂尔多斯盆地渭北地区延长组长6油层组主要为灰色细砂岩、粉砂岩沉积。在岩心、测井、单井相及测试资料分析的基础上,对研究区上三叠统长6油层组的沉积微相特征及各小层沉积微相平面展布特征进行了深入系统的研究。结果表明:渭北地区长6油层主要为辫状河三角洲前缘沉积和浊流沉积,辫状河三角洲前缘主要包括水下分流河道、河口坝、远砂坝、席状砂和分流间湾等微相。研究成果为有利储集相带的预测及下一步的勘探奠定了基础。
Chang 6 reservoir of Yanchang Formation in Weibei area is mainly composed of gray fine sandstone and sihstone. Based on core observation, single well facies and logging data analysis, the characteristics of sedimentary microfacies and the distribution of microfacies in each sublayer of Upper Jurassic are systematically studied. The results show that braided river delta front and turbidite are the main deposits in Chang 6 reservoir in Weibei area. The subaqueous distributary channel, mouth bar, distal bar, sand sheet and interdistributary bay are the main sedimentary microfacies of the braided river delta front. The study results settle a strong base for the prediction of favorable reservoir facies belts and the further exploration.
出处
《岩性油气藏》
CSCD
2008年第3期69-73,共5页
Lithologic Reservoirs
关键词
沉积相
辫状河三角洲
浊流沉积
延长组
鄂尔多斯盆地
sedimentary facies
braided river delta
turbidity deposit
Yanchang Formation
Ordos Basin
