吉木萨尔凹陷芦草沟组致密油藏原油性质影响因素  

Influencing Factors of Crude Oil Properties in Lucaogou Tight Reservoir in Jimsar Sag,Eastern Junggar Basin

作　　者：彭永灿[1] 李映艳[1] 马辉树[1] 杨琨[2] 刘建[3] 陈迎晓 

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [2]中国石油新疆油田分公司开发公司,新疆克拉玛依834000 [3]中国石油新疆油田分公司风城作业区,新疆克拉玛依834000 [4]中国石油新疆油田分公司金戈壁公司,新疆克拉玛依834000

出　　处：《新疆石油地质》2015年第6期656-659,共4页Xinjiang Petroleum Geology

基　　金：国家973项目(2015CB250906)

摘　　要：吉木萨尔凹陷芦草沟组致密油藏为源储一体的近源油藏,纵向上发育2套甜点体,相隔约100 m,储集层皆为咸化湖相沉积,但其原油性质差异较大,埋藏深的下甜点体原油比埋藏浅的上甜点体原油稠。针对这种原油性质分布反常的特点,从烃源岩母质类型、油源、烃源岩热演化程度、原油生物降解4个方面进行分析,揭示了研究区原油偏稠以及原油性质差异性分布的原因。The tight reservoir of Lucaogou formation is a near-source oil pool with both source and reservoir in Jimsar sag, where there exist two sweet spots being 100 meters apart in the vertical. They belong to saline lacustrine deposits with big difference of fluid property. The crude oil in the lower sweet spot is much heavier than that in the upper one. Focusing on this feature of unusual distribution in crude oil property, this paper analyzed their kerogen type, oil source, source rocks＇ thermal evolution and oil biodegradation, and reveals the reasons for the partial thick crude oil and differential distribution in this area.

关 键 词：准噶尔盆地 吉木萨尔凹陷 芦草沟组 致密油藏 烃源岩 热演化 生物降解 

分 类 号：TE112.43[石油与天然气工程—油气勘探]