论文详情
延吉盆地热史分析
石油与天然气地质
1997年 18卷 第No.2期
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Title
THERMAL HISTORY ANALYSIS OF YANJI BASIN
Authors
Chen Zhaonian
Chen Fajing
Dong Yong
摘要
延吉盆地的正演和反演热史分析表明,该盆地裂隙期热流值随伸展程度的提高而增大,在龙井期初时,经历了94mW/m的高热流,进入坳陷期热流呈指数函数衰减,抬升剥蚀期热流逐渐减小。由于龙井组沉积末期盆地处于抬升剥蚀阶段,正处于烃源岩的成熟期,生成的油气因保存条件差而易于逸散和破坏,所以该盆地油气勘探风险程度较高。
Abstract
Thermal history analysis results indicate that the heat flux of Yanji Basin increased with the inerease of extension degree during fracture stage, and the value even reached 94 m W/m during early Longjing stage; the value delayed by index during the subsiding stage of the basin, and it decreased during denudation stage.During late Longjing stage, the basin was uplifted and eroded. This happened to be the maturation stage of the source rocks of the basin,hydrocarbon resources generated might be easily lost due to the poor preservation condition. Thus oil and gas exploration in this basin would run a high risk.
关键词：
镜质体反射率;
磷灰石;
封闭径迹长度;
热史;
延吉盆地;
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