吉木萨尔凹陷芦草沟组页岩油甜点主控因素研究与实践

doi:10.7657/XJPG20250601

新疆石油地质 ›› 2025, Vol. 46 ›› Issue (6): 647-658.doi: 10.7657/XJPG20250601

• 油气勘探 • 下一篇

吉木萨尔凹陷芦草沟组页岩油甜点主控因素研究与实践

金之钧¹^,²(), 曹琰¹^,², 张虹¹^,², 唐勇³, 秦志军^4a, 刘扣其¹^,²(), 梁成钢^4b, 李关访⁵, 何文军^4a

1.北京大学 a.能源研究院；b.地球与空间科学学院，北京 100871
2.页岩油气富集机理与高效开发全国重点实验室，北京 100083
3.怀柔实验室新疆研究院，乌鲁木齐 830000
4.中国石油新疆油田分公司 a.勘探开发研究院，新疆克拉玛依 834000；b.吉庆油田作业区，新疆吉木萨尔 831700
5.中国科学院地质与地球物理研究所深层油气理论与智能勘探开发重点实验室，北京 100029

收稿日期:2025-09-28 修回日期:2025-10-23 出版日期:2025-12-01 发布日期:2025-12-05
通讯作者: 刘扣其 E-mail:jinzj1957@pku.edu.cn;kouqi.liu@pku.edu.cn
作者简介:金之钧（1957-），男，山东胶南人，中国科学院院士，石油天然气地质理论研究及勘探实践，（Email）jinzj1957@pku.edu.cn
基金资助:
国家自然科学基金(42090025);国家自然科学基金(42488101);国家科技重大专项(2025ZD1405004);中国石油科技创新基金(2024DQ02-0113);国家资助博士后研究人员计划(GZB20240007)

Main Controlling Factors and Development Practice of Shale Oil Sweet Spots in the Lucaogou Formation, Jimsar Sag, Junggar Basin

JIN Zhijun¹^,²(), CAO Yan¹^,², ZHANG Hong¹^,², TANG Yong³, QIN Zhijun^4a, LIU Kouqi¹^,²(), LIANG Chenggang^4b, LI Guanfang⁵, HE Wenjun^4a

1. Peking University, a.Institute of Energy; b.School of Earth and Space Sciences, Beijing 100871, China
2. National Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development, Beijing 100083, China
3. Xinjiang Research Institute, Huairou Laboratory, Urumqi, Xinjiang 830000, China
4. PetroChina Xinjiang Oilfield Company, a.Research Institute of Exploration and Development, Karamay, Xinjiang 834000, China; b.Jiqing Oilfield Operation District, Jimsar, Xinjiang 831700, China
5. Key Laboratory of Deep Petroleum Intelligent Exploration and Development, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received:2025-09-28 Revised:2025-10-23 Online:2025-12-01 Published:2025-12-05
Contact: LIU Kouqi E-mail:jinzj1957@pku.edu.cn;kouqi.liu@pku.edu.cn

摘要/Abstract

摘要：

吉木萨尔凹陷二叠系芦草沟组是中国陆相页岩油勘探的重要层系之一，但当前仍存在地质甜点主控因素不明确、甜点评价体系不完善、开发层段分布不连续等问题。厘清甜点段的形成机制与识别标准，对于完善页岩油勘探理论体系、指导高效开发具有重要意义。利用岩心、测井及实验分析资料，从储集性、含油性、可动性和可压性4个维度系统分析了芦草沟组页岩油甜点的主控因素。研究结果表明：芦草沟组可划分为上、中、下3个甜点段，其中，中甜点段尚未大规模开发，潜力显著；粉砂岩和碳酸盐长英质页岩宏孔发育、游离烃含量高、可动性好，是优质甜点岩相；总有机碳含量适中、成熟度适中、脆性矿物含量高的层段更利于形成可压裂甜点。基于“四性”耦合评价，指出中甜点段具备良好开发前景，并通过JHW85-71井的成功实践验证了其高产潜力。该研究为吉木萨尔凹陷芦草沟组页岩油甜点识别与开发部署提供了科学依据。

关键词: 准噶尔盆地, 吉木萨尔凹陷, 芦草沟组, 页岩油, 甜点段, 主控因素, 开发建议

Abstract:

The Permian Lucaogou formation in the Jimsar sag, Junggar Basin, represents one of the most significant continental shale oil plays in China. However, uncertainties remain regarding the primary geological controls of “sweet spots”, incomplete evaluation frameworks, and discontinuous distribution of productive intervals. Clarifying the formation mechanisms and identification criteria of the sweet spots is critical for advancing shale oil exploration theory and guiding efficient development. Based on core, well logging, and experimental data, this study systematically investigates the controlling factors of shale oil sweet spots in the Lucaogou formation from four dimensions (reservoir capacity, oil-bearing capacity, mobility, and fracability). The results indicate that the Lucaogou formation can be divided into upper, middle, and lower sweet-spot intervals, among which the middle interval remains largely undeveloped yet holds substantial potential. Siltstone and calcareous-felsic shale which are characterized by abundant macropores, high free hydrocarbon content, and strong mobility constitute the most favorable lithofacies. Intervals with moderate total organic carbon (TOC) content, moderate maturity, and high brittle-mineral content are more conducive to forming fracable sweet spots. A four-property coupling evaluation highlights the middle interval as a prime development target which is further validated by the high-yield performance of Well JHW85-71. This study provides a scientific foundation for sweet spot identification and development planning of shale oil in the Lucaogou formation in the Jimsar sag.

Key words: Junggar Basin, Jimsar sag, Lucaogou formation, shale oil, sweet-spot interval, controlling factor, development strategy

中图分类号:

P618.12

金之钧, 曹琰, 张虹, 唐勇, 秦志军, 刘扣其, 梁成钢, 李关访, 何文军. 吉木萨尔凹陷芦草沟组页岩油甜点主控因素研究与实践[J]. 新疆石油地质, 2025, 46(6): 647-658.

JIN Zhijun, CAO Yan, ZHANG Hong, TANG Yong, QIN Zhijun, LIU Kouqi, LIANG Chenggang, LI Guanfang, HE Wenjun. Main Controlling Factors and Development Practice of Shale Oil Sweet Spots in the Lucaogou Formation, Jimsar Sag, Junggar Basin[J]. Xinjiang Petroleum Geology, 2025, 46(6): 647-658.

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吉木萨尔凹陷芦草沟组页岩油甜点主控因素研究与实践

Main Controlling Factors and Development Practice of Shale Oil Sweet Spots in the Lucaogou Formation, Jimsar Sag, Junggar Basin

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