摘要
滨北地区现今为高地温场,全区地温梯度为2.3～4.8 ℃/100m,古地温比现今温度更高.白垩纪末期之前古地温梯度约为5.5 ℃/100m,白垩纪末期之后因持续抬升剥蚀和大地热流值衰减作用,使滨北地区自早第三纪开始降温,第三纪-第四纪古地温梯度变化为5.5～3.2 ℃/100m,因此滨北地区最高古地温是在白垩纪末期达到的.
Binbei area is currently a kind of high geothermal field with the geothermal gradient of 2.3~4.8℃/100m, and the palaeogeothermal temperature is higher than current temperature. The palaeogeothermal gradient was about 5.5℃/100m before the end of Cretaceous, while it varied from 5.5 to 3.2℃/100m between Tertiary and Quaternary period because of the continuous uplift erosion and the decrease of the Terrestrial heat flow, which made the palaeotemperature begin to decrease at early Tertiary. From above all, the palaeotemperature reached the peak at the end of Cretaceous.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2005年第4期8-10,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
滨北地区
中浅层
古地温
演化史
Binbei area
Medium-Shallow layers
palaeotemperature
evolution history
