摘要
本文应用磷灰石裂变径迹、镜质体动力学模型等方法恢复二连盆地侏罗系地层的热演化史。二连盆地图参1井磷灰石退火深度为1600—2774m，对应的退火温度为64-102.7℃，图参1井现今温度小于最高古地温，这是由于二连盆地地温梯度逐渐降低及地层发生抬升和剥蚀所致。根据磷灰石裂变径迹分析和镜质体动力学模型模拟图参1井的热演化史，在晚侏罗世时其经受的最高地温梯度分别为7℃／hm和6℃／hm。侏罗系地层在晚白垩世开始进入生油期，第三纪时进入生油高峰，这时侏罗系地层经受的最高古地温为137℃。
Fission-track analysis, chemical kinetics model of vitrinite have been used to construct the thermal evolution of Jurassic System in Erlian Basin. The annealing depth of apatite from Drill hole Tucan 1 is 1600- 2587m, and the corresponding annealing paleotemperature is 64-102.7℃. The present temperature in the depth of the hole is lower than the highest palaeotemperature, because the palaeotemperature gradient dropped gradually, and the Jurassic System lifted and eroded. The highest temperature gradient which Jurassic System experienced is 7℃/ hm and 6.0℃ / hm,respectively according to simulation of fission-track analysis and chemical kinetics model of vitrinite. Jurassic System entered oil-generating stage in Late Cretaceous Period, and entered oil-generating peak in Tertiary Period.
出处
《地球化学》
CAS
CSCD
北大核心
1998年第6期592-598,共7页
Geochimica
基金
华北石油管理局横向课题!910407
关键词
裂变径迹
热演化史
地层
侏罗系
磷灰石
油气藏
fission-track analysis, chemical kinetics model, paleotemperature,thermal evolution histry
