新疆石油地质

新疆石油地质 ›› 2025, Vol. 46 ›› Issue (6): 693-702.doi: 10.7657/XJPG20250605

• 油气勘探 • 上一篇    下一篇

玛湖凹陷风城组碱湖页岩油富集和高产主控因素

邹阳1a(), 陈文顺1b, 罗刚1a, 陈绍蓉1a, 陈方文2(), 何文军1a, 刘新龙1a, 朱涛1a   

  1. 1.中国石油 新疆油田分公司 a.勘探开发研究院；b.开发事业部，新疆 克拉玛依 834000
    2.中国石油大学（华东） 地球科学与技术学院，山东 青岛 266580
  • 收稿日期:2025-04-30 修回日期:2025-08-20 出版日期:2025-12-01 发布日期:2025-12-05
  • 通讯作者: 陈方文 E-mail:zou_yang@petrochina.com.cn;chenfw@upc.edu.cn
  • 作者简介:邹阳（1988-），男，湖北荆州人，高级工程师，硕士，油气地质，（Tel）13519901597（Email）zou_yang@petrochina.com.cn
  • 基金资助:
    国家科技重大专项(2025ZD1400301);中国石油科技项目(2023ZZ15);中国石油前瞻性基础性技术攻关项目(2022DJ0108);中国石油前瞻性基础性技术攻关项目(2024XJZD01)

Main Factors Controlling the Enrichment and High Production of Alkaline Lacustrine Shale Oil in Fengcheng Formation, Mahu Sag, Junggar Basin

ZOU Yang1a(), CHEN Wenshun1b, LUO Gang1a, CHEN Shaorong1a, CHEN Fangwen2(), HE Wenjun1a, LIU Xinlong1a, ZHU Tao1a   

  1. 1. PetroChina Xinjiang Oilfield Company, a.Research Institute of Petroleum Exploration and Development; b.Development Division, Karamay, Xinjiang 834000, China
    2. School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266580, China
  • Received:2025-04-30 Revised:2025-08-20 Online:2025-12-01 Published:2025-12-05
  • Contact: CHEN Fangwen E-mail:zou_yang@petrochina.com.cn;chenfw@upc.edu.cn

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摘要： 准噶尔盆地玛湖凹陷二叠系风城组碱湖页岩油富集和高产主控因素不清，其理论认识和勘探开发受到限制。以风城组页岩油储集层岩石学特征、有机地球化学特征和物性特征为基础，分析风城组烃源岩和储集层岩性对页岩油富集的影响，结合重点井产液剖面获得产油量，分析页岩油富集、裂缝和地层超压对页岩油产量的影响。结果表明：风城组页岩油储集层游离烃含量随总有机碳含量的增大而增大，含油饱和度指数随埋深的增加呈增大趋势，有机质丰度、类型和成熟度是决定页岩油富集程度的关键因素；风城组粉砂岩类页岩油储集层储集空间最好，其次为泥岩类和内源岩类储集层，储集层岩性控制储集空间，影响页岩油富集程度；页岩油富集为页岩油高产的基础，风城组页岩油储集层米产油量随总有机碳含量和长英质矿物含量的增大而增大；裂缝走向与现今最大水平主应力方向的关系影响页岩油渗流特征和产量；地层超压具有保孔、增渗、降黏、提高页岩油产量和采收率的作用。研究结果确定了风城组页岩油富集和高产主控因素，为勘探开发部署提供了科学依据。

关键词: 准噶尔盆地, 玛湖凹陷, 风城组, 页岩油, 富集, 高产, 主控因素

Abstract:

The main factors controlling the enrichment and high production of alkaline lacustrine shale oil in the Permian Fengcheng formation in the Mahu sag of Junggar Basin remain unclear, which limits theoretical understanding and efficient development. Based on the petrological, organic geochemical and physical characteristics of the Fengcheng shale oil reservoirs, the effects of source rock and reservoir lithology on shale oil enrichment in the Fengcheng formation were analyzed. Combined with the production profiles obtained from the key wells, the influences of shale oil enrichment, fractures and formation overpressure on the production of shale oil were identified. The findings are obtained in five aspects. First, in the Fengcheng shale oil reservoirs, the free hydrocarbon content increases with the increase of total organic carbon content (TOC), and the oil saturation index increases with the burial depth, indicating that the abundance, type and maturity of organic matter are the key factors determining the enrichment of shale oil. Second, siltstone exhibits the best storage space, followed by mudstone and endogenous rock, suggesting that the reservoir lithology controls the storage space and thus affects the enrichment of shale oil. Third, the enrichment is fundamental to the high production of shale oil. The shale oil production per meter from the Fengcheng reservoirs increases with the increase of TOC and feldspar mineral content. Fourth, the relationship between fracture orientation and present-day maximum horizontal principal stress direction affects the flow and production of the shale oil. Fifth, formation overpressure plays a role in retaining porosity, increasing permeability, reducing viscosity, and enhancing production/recovery of shale oil. The study clarifies the main factors controlling the enrichment and high production of shale oil in the Fengcheng formation, providing a scientific basis for further exploration and development.

Key words: Junggar Basin, Mahu sag, Fengcheng formation, shale oil, enrichment, high production, main controlling factor

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