鹿邑凹陷古生界烃源岩热演化  

THERMAL EVOLUTION OF PALEOZOIC SOURCE ROCKS IN LUYI SAG

作　　者：刘建[1] 刘俊[1] 蒋伟[1] 陈倩岚[1] 高慧娉[1] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023

出　　处：《海洋地质动态》2010年第5期15-19,共5页Marine Geology Letters

基　　金："全国油气资源战略选区调查与评价"专项(XQ-2007-02-3-3)

摘　　要：鹿邑凹陷位于周口坳陷北部凹陷带东端,以Ro为古温标的周参7井和周参8井热史恢复结果表明,鹿邑凹陷古生代为克拉通台地阶段,基底热流值较低（40-50 mW/m^2）,剥蚀厚度小;印支—燕山期构造活动强烈,基底热流值升高到83 mW/m^2,剥蚀厚度1 000-2 000 m左右;喜山期至今基地热流值降低到49 mW/m^2,盆地冷却。鹿邑凹陷主要有中奥陶统和二叠等4套烃源岩,主要生烃期为早中三叠世,印支燕山期生烃停滞,喜山期以生气为主。Luyi sag is located in the east part of Zhoukou depression zone,by taking Ro as palaeotemperature scale of Zhoucan 7 and 8,the results of thermal history reconstruction show that the basal heat flow（40～50 mW/m^2）of Luyi sag was relatively low and the erosion thickness was small,with the sag in the stage of cratonic platform in Paleozoic;The basal heat flow was increased to 83 mW/m^2 with intense tectonic activities from Indo-Chinese epoch to Yanshanian epoch,the erosion thickness was about 1 000-2 000 m then.The heat flow decreased to 49 mW/m^2and the basin was cooled since Himalayan period.There are mainly four sets of source rocks in Luyi sag,such as Middle Ordovician and Permian source rocks.The main generation period is early-middle Triassic,the hydrocarbon generation was sluggish from Indo-Chinese epoch to Yanshanian epoch,the source rocks with high thermal evolution of gas was mostly in Himalayan period.

关 键 词：鹿邑凹陷 烃源岩 剥蚀厚度 热史 成烃史 

分 类 号：P618.130.2[天文地球—矿床学]