西湖凹陷中央背斜带两种热体制下烃源岩的热演化  

THERMAL EVOLUTION OF SOURCE ROCKS UNDER TWO THERMAL SYSTEMS IN THE CENTRAL ANTICLINAL ZONE IN XIHU SAG,EAST CHINA SEA BASIN

作　　者：周瑾 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院，北京100083

出　　处：《中国海上油气（地质）》2003年第1期64-68,共5页China Offshore Oil and Gas(Geology)

摘　　要：通过对东海盆地西湖凹陷中央背斜带不同区带的单井流体包裹体、镜质体反射率以及盆地模拟结果的分析,认为该区烃源岩的热演化存在2种热体制,即正常热传导下的热体制和叠加了异常岩浆热作用的热体制.在正常热传导背景下,西湖凹陷中央背斜带沉积速率、升温速率、成熟速率以及生烃速率等四者之间相辅相成,依次控制;局部岩浆热作用会产生古地温的浅部高温现象,它对加速该区烃源岩层的生烃过程以及提高生烃量和生烃速率具有促进作用.According to analyses of data of fluid inclusions, vitrinite reflectance and basin modeling for single wells, two thermal systems are identified in the central anticlinal zone in Xihu sag, i.e. one with normal thermal conduction and the other superposed by abnormal magmatic thermal effect. Under the normal thermal conduction, the four rates of sedimentation, temperature rise, organic maturation and hydrocarbon generation are successively effective and promotive in central anticlinal zone of Xihu sag. But local magmatic effects have resulted some shallower paleotemperature hights, which have accelerated hydrocarbon generation and increased its yields.

关 键 词：西湖凹陷 中央背斜带 热体制 烃源岩 热演化 流体包裹体 沉积速率 油气藏 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]