库车坳陷侏罗系烃源岩热演化研究

ON THERMAL EVOLUTION OF JURASSIC SOURCE ROCKS IN THE KUQA DEPRESSION, TARIM BASIN

根据烃源岩样品Ro、EasyRo值、天然气成熟度分析 ,库车坳陷侏罗系烃源岩热演化程度较高 ,总体上已达成熟 -高成熟阶段。拜城凹陷烃源岩成熟度高 ,该凹陷及其周围是寻找大中型气田的有利地区。拜城凹陷和阳霞凹陷侏罗系烃源岩分别约在老第三纪和晚白垩世开始进入成熟阶段 ,分别在中新世末和渐新世末进入生气高峰 ,气源岩的热演化具有先慢后快的特点。库车坳陷天然气藏主要在喜山期形成。

Based on Ro analysis of the source rocks, Easy Ro value and gas maturation degree, the Jurassic source rocks of the Kuqa Depression in the Tarim Basin are high in thermal maturation degree, generally reaching the matured to highly\|matured stage. Based on previous study the thermal maturation degree is low. From thermal maturation degree of the source rocks, the Kuqa Depression shows good prospects in natural gas exploration. The Baicheng Sag and its adjacent area are good targets for prospecting of large\|medium\|sized gas fields.\;