文章基本信息

标题：Differentiation of Palaeogene sand by glauconitic and geochemical fingerprinting, Siri Canyon, Danish North Sea
本地全文：下载
作者：Mette Olivarius ; Christian Knudsen ; Johan B. Svendsen 等
期刊名称：Geological Survey of Denmark and Greenland Bulletin
印刷版ISSN：1604-8156
出版年度：2011
卷号：23
页码：17-20
语种：English
出版社：De Nationale Geologiske Undersoegelser for Danmark og Groenland
摘要：The submarine Siri Canyon is NE–SW-oriented and locatedin the Danish North Sea (Fig. 1). It contains a number of oilreservoirs with glauconite-rich sand. The reservoirs of interest in the Nini oil field are the Late Paleocene Tyr Member ofthe Lista Formation and the Kolga Member of the Sele Formation (Schiøler et al. 2007), presumably of Early Eoceneage. These members have previously been known as the Tyand Hermod members (Hamberg et al. 2005; Poulsen et al.2007). The sand shows signs of injection, both in cores andin seismic data. The aim of this work is to chemically characterise and fingerprint the sand in order to reveal the origin ofthe sand found in three horizontal wells, which could havebeen injected from one or both of the Tyr and Kolga members. Core samples were collected from two vertical wells ofknown stratigraphy to make a basis of comparison, whereassamples of the cuttings were collected from the three horizontal wells with ages primarily corresponding to the KolgaMember. The purpose was moreover to evaluate whethercuttings samples can be used for fingerprinting as an alternative to core samples.