石油学报 ›› 2023, Vol. 44 ›› Issue (5): 794-808.DOI: 10.7623/syxb202305006

• 地质勘探 • 上一篇    下一篇

塔里木盆地台盆过渡带多相态油气藏成因及差异富集模式——以玉科地区奥陶系为例

李斌1,2, 姜潇俊3, 赵星星4, 邬光辉1,2, 韩剑发5, 刘强6, 汪如军6   

  1. 1. 西南石油大学地球科学与技术学院 四川成都 610500;
    2. 西南石油大学油气藏地质及开发工程国家重点实验室 四川成都 610500;
    3. 中国地质大学(武汉)资源学院 湖北武汉 430074;
    4. 中国石油塔里木油田公司油气田产能建设事业部 新疆库尔勒 841000;
    5. 中国石油塔里木油田公司勘探开发研究院 新疆库尔勒 841000;
    6. 中国石油塔里木油田公司 新疆库尔勒 841000
  • 收稿日期:2022-09-07 修回日期:2023-03-22 出版日期:2023-05-25 发布日期:2023-05-31
  • 通讯作者: 李斌,男,1977年2月生,2006年获中国科学院广州地球化学研究所博士学位,现为西南石油大学副教授,主要从事油气成藏的科研和教学工作。
  • 作者简介:李斌,男,1977年2月生,2006年获中国科学院广州地球化学研究所博士学位,现为西南石油大学副教授,主要从事油气成藏的科研和教学工作。Email:lbin@swpu.edu.cn
  • 基金资助:
    四川省区域创新合作项目"复杂油藏高效开发相关技术研究及推广应用"(21QYCX0050)资助。

Genesis and differential enrichment model of multiphase reservoirs in platform-basin transitional zone of Tarim Basin: a case study of the Ordovician in Yuke area

Li Bin1,2, Jiang Xiaojun3, Zhao Xingxing4, Wu Guanghui1,2, Han Jianfa5, Liu Qiang6, Wang Rujun6   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Sichuan Chengdu 610500, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan Chengdu 610500, China;
    3. School of Resources, China University of Geosciences, Hubei Wuhan 430074, China;
    4. Oil & Gas Field Productivity Construction Department, PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China;
    5. Research Institute of Petroleum Exploration and Development, PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China;
    6. PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China
  • Received:2022-09-07 Revised:2023-03-22 Online:2023-05-25 Published:2023-05-31

摘要: 塔里木盆地台盆过渡带玉科地区的奥陶系获得了较好的油气勘探成果,其多相态油气藏沿斜坡带的有序分布和共存机制是勘探开发亟待探索的问题。基于油气物理性质和地球化学参数的分析认为:玉科地区的奥陶系油气主要来源于下寒武统玉尔吐斯组烃源岩,原油为成熟—高成熟油,天然气为干酪根降解气与古油藏裂解气的混合气。烃源岩的生烃史及油气成熟度特征显示,玉科地区存在多期油气充注。中寒武统膏盐岩层的封堵是控制玉科地区油气差异充注的主要原因。海西晚期是玉科地区轻质油充注的主要时期;喜马拉雅晚期,玉科地区东部因无膏盐岩盖层遮挡,强气侵作用导致凝析气藏和挥发油藏形成,并导致玉科地区中—西部奥陶系轻质油藏具有"早期成藏、垂向充注、膏岩封堵"的成藏特征,而东部凝析气藏具有"多期充注、侧向调整、晚期气侵"的成藏特征。以玉科地区为代表的台盆过渡带的深层油气勘探具有巨大潜力。玉科地区中—西部下奥陶统鹰山组和蓬莱坝组走滑断裂内的油气资源和东部走滑断裂控制的凝析气藏是值得关注的有利勘探目标。

关键词: 多相态油气藏, 差异富集模式, 走滑断裂, 膏盐岩, 奥陶系, 玉科地区

Abstract: Although good achievements have been made during the Ordovician oil-gas exploration of Yuke area in the platform-basin transitional zone of Tarim Basin, it is urgent to explore the problems such as the orderly distribution along the slope zone and coexistence mechanism of multiphase reservoirs during hydrocarbon exploration and development. Based on analyzing the physical properties and geochemical parameters of oil and gas, it is considered that the Ordovician oil and gas in Yuke area mainly originates from source rocks of the Lower Cambrian Yuertusi Formation. Specifically, the mature to highly-mature crude oil are discovered, and the natural gas is a mixture of kerogen degradation gas and paleoreservoir cracking gas. The hydrocarbon generation history and maturity characteristics of source rocks show that there are multi-stage oil and gas charging in Yuke area. The sealing effect of the Middle Cambrian gypsum rock formations is the main reason for controlling the differential hydrocarbon charging in Yuke area. The Late Hercynian was the main period of light oil charging in Yuke area; in the Late Himalayan, due to the absence of gypsum cap rocks in the eastern Yuke area, strong gas invasion led to the formation of condensate gas reservoirs and volatile oil reservoirs, and thus the Ordovician light oil reservoirs in the central and western Yuke area have the accumulation characteristics of "early accumulation, vertical charging, and gypsum rock sealing". By contrast, the condensate gas reservoirs in the east had the characteristics of "multi-stage charging, lateral adjustment, and later gas invasion". The deep oil and gas in the platform-basin transitional zone represented by Yuke area have great exploration potential. In Yuke area, the oil and gas resources of Lower Ordovician Yingshan Formation and Penglaiba Formation along the strike-slip faults in the central and western part and the condensate gas reservoirs controlled by the strike-slip faults in the eastern part are noteworthy favorable exploration targets.

Key words: multiphase reservoir, differential enrichment mode, strike-slip fault, gypsum rock, Ordovician, Yuke area

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