准噶尔盆地车排子凸起轻质油母源及充注方向  

Source and migrating direction of light oil in Chepaizi Uplift,Junggar Basin

作　　者：李政[1,2] 张林晔[2] 沈忠民[1] 郭春清[2] 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《石油实验地质》2011年第4期419-423,436,共6页Petroleum Geology & Experiment

摘　　要：车排子凸起新近系沙湾组轻质油藏的发现是该区油气勘探史上的一个重大突破。通过稳定碳同位素及生物标志物等地球化学指标的分析,认为该原油并非侏罗系与其它层系烃源岩的混源,而是侏罗系烃源岩生成的单源原油。通过侏罗系烃源岩生排烃史、车排子凸起构造发育史以及与独山子原油地化特征的分析与对比,认为该轻质油来自车排子凸起南部的四棵树凹陷东南端及北天山山前断褶带,该区侏罗系烃源岩生成的原油经深部断裂垂向运移至新近系沙湾组地层后,再沿车排子凸起的南倾斜面经沙湾组厚砂层向北或北偏西方向侧向运移至车排子地区,并在合适的圈闭聚集成藏。The discovery of light oil reservoir of Neogene Shawan Formation is a great breakthrough in petroleum exploration history of the Chepaizi Uplift, the Junggar Basin. Studies of geochemical parameters such as stable isotope and biological markers have indicated that the crude oils in the region come from Jurassic hydrocarbon source rocks. Geochemical features of the Dushanzi crude oil are compared with histories of hydrocarbon generation and migration of the Jurassic source rock and tectonic evolution of the Chepaizi Uplift, proving that the light oils mainly come from the Sikeshu Sag and the faulted fold zones of the Northern Tianshan Mountain. The crude oils which sourced from Jurassic migrate vertically through deep fractures into the Neogene Shawan Formation, and then move northward or northwestward along the southern slope of Chepaizi Uplift to the Chepaizi region, and finally accumulate in proper traps.

关 键 词：轻质油 油源对比 充注方向 侏罗系 车排子凸起 准噶尔盆地 

分 类 号：TE122.114[石油与天然气工程—油气勘探]