湖相碳酸盐烃源岩热解生烃特征  

Hydrocarbon-generating characteristics of lacustrine carbonate rocks

作　　者：马素萍[1] 罗春树[2] 田春桃[1,3] 杨燕[1,3] 

机构地区：[1]中国科学院地质与地球物理研究所油气资源研究重点实验室,兰州730000 [2]塔里木油田分公司勘探开发研究院,库尔勒841000 [3]中国科学院研究生院,北京100039

出　　处：《成都理工大学学报（自然科学版）》2012年第6期583-587,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中国科学院油气资源研究重点实验室开放基金资助项目(KFJJ2010-05)

摘　　要：湖相碳酸盐岩的生烃研究较为薄弱,但具有重要的勘探与理论意义。选择酒西盆地青西凹陷2种岩性的湖相烃源岩——泥岩和泥质白云岩进行热解模拟实验,对比分析了2种不同岩性湖相烃源岩的生烃过程,并建立了它们各自的生烃模式。实验结果表明,泥质白云岩生烃高峰明显晚于泥岩,即甲烷产量峰值较泥岩后移,液态烃的生烃高峰出现在高温演化阶段,具有晚期生烃的特点。对于湖相碳酸盐岩生油盆地,2套湖相烃源岩的生烃模式不同,生烃高峰期亦不同,门限深度不能一概而论。The study on the hydrocarbon-generating of lacustrine carbonate rocks has very important significance in exploration and theory. Meanwhile, it is very weak compared with the marine carbonate rocks and the muddy source rocks. Through the kinetics simulation experiment by using lacustrine mudstone and argillaceous dolomite, the hydrocarbon-generating process of these two different lithology limnetic source rocks are researched comparatively. Based on this experiment, the hydrocarbon-generating models of these two rocks are established, respectively. The experiment result shows that the hydrocarbon-generating peak of the lacustrine carbonate rocks is later than that of the lacustrine mudstone. The peak gas generation of the lacustrine carbonate rocks is relatively late. Moreover, the hydrocarbon-generating peak of liquid hydrocarbon from the lacustrine carbonate rocks occurs at the stage of high-temperature evolution. This indicates that late hydrocarbon generation is the characteristic of the lacustrine carbonate rocks. It is considerable that the oil threshold depths of these two source rocks are different in the lacustrine carbonate rocks petroleum basin.

关 键 词：生烃特征 烃源岩 湖相碳酸盐岩 

分 类 号：TE122.113[石油与天然气工程—油气勘探]