@inbook{b730b6300d9c429089d38ec6be6a3833,
title = "Formation temperatures in the Danish Central Graben",
abstract = "The formation temperatures are mapped in the depths of 1, 2, 3, and 4 km in the Central Graben (Danish North Sea). The general trend is increasing temperatures towards the north-eastern fault boundary of the graben. Positive temperature anomalies are found around the Tyra Field in a depth of 1 km. Fluid movements in this area is possible. The observed temperature is high around the top of salt structures. The temperature is high where there is a thick cover of the low conductive, Lower Cretaceous and Jurassic shales. The top Jurassic temperature is mainly a function of the burrial depth with increasing temperatures from about 80°C at the southern part of the Central Graben to about 125°C at the northern part. Locally the temperature is higher than 140°C. The temperature maps reflect the general geological trend and the temperature seems to be of conductive origin, except in the area of the Tyra Field where convection of fluids may occur. Temperature as a function of time is calculated for top and base of the J-4 Un t at some locations. Temperature through time of the J-4 Unit is increasing from the Southern Salt-dome Province towards the northern Tail End Graben. The Eocene rise of surface temperature has heated the subsurface temperature.",
keywords = "Denmark, Denmark",
author = "Jensen, {Peter Klint}",
year = "1983",
month = nov,
day = "30",
doi = "10.22008/gpub/38313",
language = "English",
isbn = "87-421-0735-0",
series = "DGU {\AA}rbog",
publisher = "DGU",
pages = "91--106",
booktitle = "DGU {\AA}rbog 1982",
}