准噶尔盆地吉木萨尔凹陷陆相页岩油地质特征与聚集机理

doi:10.11743/ogg20190308

石油与天然气地质 ›› 2019, Vol. 40 ›› Issue (3): 524-534.doi: 10.11743/ogg20190308

准噶尔盆地吉木萨尔凹陷陆相页岩油地质特征与聚集机理

支东明¹, 唐勇², 杨智峰^2,3, 郭旭光², 郑孟林², 万敏², 黄立良²

1. 中国石油新疆油田分公司, 新疆克拉玛依 834000;
2. 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;
3. 中国石油新疆油田分公司博士后工作站, 新疆克拉玛依 834000

收稿日期:2018-12-20 修回日期:2019-03-05 出版日期:2019-06-28 发布日期:2019-04-26
作者简介:支东明(1971-),男,教授级高级工程师,石油地质学。E-mail:zhidm@petrochina.com.cn。
基金资助:
国家科技重大专项（2017ZX05001002）；中国石油科技重大专项（2017E-0401）。

Geological characteristics and accumulation mechanism of continental shale oil in Jimusaer sag,Junggar Basin

Zhi Dongming¹, Tang Yong², Yang Zhifeng^2,3, Guo Xuguang², Zheng Menglin², Wan Min², Huang Liliang²

1. Xinjiang Oilfield Branch Company, PetroChina, Karamay, Xinjiang 834000, China;
2. Research Institute of Exploration and Development of Xinjiang Oilfield Branch Company, PetroChina, Karamay, Xinjiang 834000, China;
3. Postdoctoral Workstation of Xinjiang Oilfield Branch Company, PetroChina, Karamay, Xinjiang 834000, China

Received:2018-12-20 Revised:2019-03-05 Online:2019-06-28 Published:2019-04-26

摘要/Abstract

摘要： 综合利用岩心、测井、烃源岩热解、铸体薄片、场发射扫描电镜、激光共聚焦显微镜与高压压汞等分析测试的结果，对准噶尔盆地吉木萨尔凹陷芦草沟组陆相页岩油地质特征与聚集机理进行了研究。结果表明：吉木萨尔凹陷咸化湖盆型沉积地层富含有机质，是烃源岩层也是储层，页岩油藏具有“源储一体”的地质特征，存在粉砂岩类与泥岩类和白云岩类与泥岩类两类岩性组合类型。芦草沟组大面积整体含油、“甜点”富集且原油成熟度较低。页岩油赋存岩石的润湿性为亲油性，生烃增压是页岩油运聚的主要动力。微纳米孔喉、层理缝与构造裂缝形成页岩油的有利储集空间与渗流通道。页岩油整体为源内或近源聚集，并以游离态和吸附态赋存于芦草沟组“甜点”段与泥页岩层段中。

关键词: 生烃增压, 页岩油, 烃源岩, 源储一体, 富集机理, 咸化湖盆, 芦草沟组, 吉木萨尔凹陷, 准噶尔盆地

Abstract: We studied the geological characteristics and accumulation mechanism of continental shale oil in Jimusaer sag,based on the data collected from core and casting thin section observation,well log,Rock-Eval pyrolysis,field emission scanning electron microscopy (FE-SEM),laser-scanning confocal microscopy and high pressure mercury injection.The results show that the Lucaogou Formation in Jimusaer sag is originated from the organic-rich sediments in saline lacustrine basins,which serve as both source rocks and reservoirs,and the shale oil reservoirs herein are geologically characterized by "indigenous accumulation".There are two types of lithologic associations:one is siltstone-mudstone,and the other is dolomite-mudstone.Oil is pervasive in the Lucaogou Formation,enriches in "sweet spots",and has lower maturity.The shale oil reservoir is oil-wet,and pressurization caused by hydrocarbon generation is the main driving force for its shale oil migration and accumulation.The micro-and nano-pore throats,bedding-parallel fractures and tectonic fractures are favorable reservoir space and vadose channels for the Lucaogou shale oil in Jimusaer sag.The shale oil accumulates within or close to the source rocks as a whole,and occurs in the "sweet spots" and shale intervals in free or absorbed phases.

Key words: pressurization caused by hydrocarbon generation, shale oil, hydrocarbon source rock, indigenous accumulation, enrichment mechanism, saline lacustrine basin, Lucaogou Formation, Jimusaer sag, Junggar Basin

中图分类号:

TE122.3

支东明,唐勇,杨智峰,等. 准噶尔盆地吉木萨尔凹陷陆相页岩油地质特征与聚集机理[J]. 石油与天然气地质, 2019, 40(3): 524-534. doi: 10.11743/ogg20190308 Zhi Dongming,Tang Yong,Yang Zhifeng,et al. Geological characteristics and accumulation mechanism of continental shale oil in Jimusaer sag,Junggar Basin[J]. Oil & Gas Geology, 2019, 40(3): 524-534. doi: 10.11743/ogg20190308

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准噶尔盆地吉木萨尔凹陷陆相页岩油地质特征与聚集机理

Geological characteristics and accumulation mechanism of continental shale oil in Jimusaer sag,Junggar Basin

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