新疆石油地质 ›› 2025, Vol. 46 ›› Issue (6): 684-692.doi: 10.7657/XJPG20250604

• 油气勘探 • 上一篇    下一篇

吉木萨尔凹陷芦草沟组页岩油微观赋存特征与开采动态响应

刘金1,2a,3(), 白雷2a,3,4, 张宝真2a, 魏超1, 雷海艳2b, 邓远2a, 曹剑1()   

  1. 1.南京大学 地球科学与工程学院,南京 210023
    2.中国石油 新疆油田分公司 a.勘探开发研究院;b.玛湖勘探开发项目部,新疆克拉玛依 834000
    3.新疆页岩油勘探开发重点实验室,新疆 克拉玛依 834000
    4.中国石油大学(北京) 石油工程学院,北京 102249
  • 收稿日期:2025-04-21 修回日期:2025-07-14 出版日期:2025-12-01 发布日期:2025-12-05
  • 通讯作者: 曹剑 E-mail:liujin2015@petrochina.com.cn;jcao@nju.edu.cn
  • 作者简介:刘金(1989-),男,陕西咸阳人,高级工程师,博士研究生,油气地质,(Tel)0990-6231375(Email)liujin2015@petrochina.com.cn
  • 基金资助:
    国家自然科学基金(42230808)

Microscopic Occurrence and Production Dynamics of Shale Oil in Lucaogou Formation, Jimsar Sag, Junggar Basin

LIU Jin1,2a,3(), BAI Lei2a,3,4, ZHANG Baozhen2a, WEI Chao1, LEI Haiyan2b, DENG Yuan2a, CAO Jian1()   

  1. 1. School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
    2. PetroChina Xinjiang Oilfield Company, a.Research Institute of Exploration and Development; b.Mahu Exploration and Development Project Department, Karamay, Xinjiang 834000, China
    3. Xinjiang Key Laboratory of Shale Oil Exploration and Development, Karamay, Xinjiang 834000, China
    4. School of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China
  • Received:2025-04-21 Revised:2025-07-14 Online:2025-12-01 Published:2025-12-05
  • Contact: CAO Jian E-mail:liujin2015@petrochina.com.cn;jcao@nju.edu.cn

摘要:

陆相咸化湖盆页岩油微观赋存特征复杂,开采动态响应不明,是页岩油富集理论及动用规律研究的难题。以准噶尔盆地吉木萨尔凹陷芦草沟组为例,综合采用核磁共振、激光共聚焦、氩离子抛光、扫描电镜等技术,对页岩油储集层流体赋存状态及可动性进行表征,并结合先导试验区页岩油单井产出液监测结果进行验证。结果表明,页岩油微观赋存具有纳米孔满含油、亚微米—微米孔含油又含水,烃类轻、重组分呈洋葱皮状的特征。页岩油衰竭式动用首先以亚微米—微米孔中的轻质组分油为主,且孔隙中游离水参与了流动。油井开采过程中原油物性及产出水的变化对流体微观赋存状态具有很好的响应,页岩油井生产具有长期含水、轻重组分梯次动用的特征。

关键词: 准噶尔盆地, 吉木萨尔凹陷, 芦草沟组, 页岩油, 微观赋存状态, 动态响应

Abstract:

Complex microscopic occurrence and unclear production dynamics of shale oil in continental saline lacustrine basins challenge the study of shale oil enrichment theory and development law. Taking the Lucaogou formation in the Jimsar sag of Junggar Basin as an example, this paper characterizes the fluid occurrence state and mobility in the shale reservoirs using the techniques such as nuclear magnetic resonance, confocal laser scanning microscopy, argon ion polishing, and scanning electron microscopy, and validates against the monitoring results of produced fluid from individual wells in the pilot test area. The results show that the microscopic occurrence of the shale oil is characterized by oil fully saturating nanopores and both oil and water coexisting in sub-micron to micron-sized pores, with light and heavy components in hydrocarbons arranged in an onionskin pattern. The natural depletion of shale oil prefers the light hydrocarbon components stored in sub-micron to micron-sized pores, where free water is involved in the fluid flow. Changes in crude oil properties and produced water during well production represent effective responses to the microscopic fluid occurrence state. Shale oil well production is featured with by long-term water production and sequential producing of light and heavy components.

Key words: Junggar Basin, Jimsar sag, Lucaogou formation, shale oil, microscopic occurrence state, dynamic response

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